CN101620821B - Image display apparatus, electronic apparatus, liquid crystal TV, liquid crystal monitoring apparatus - Google Patents

Image display apparatus, electronic apparatus, liquid crystal TV, liquid crystal monitoring apparatus Download PDF

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CN101620821B
CN101620821B CN 200910160537 CN200910160537A CN101620821B CN 101620821 B CN101620821 B CN 101620821B CN 200910160537 CN200910160537 CN 200910160537 CN 200910160537 A CN200910160537 A CN 200910160537A CN 101620821 B CN101620821 B CN 101620821B
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frame
period
sub
gray level
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CN101620821A (en
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石原朋幸
井上明彦
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Sharp Corp
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Abstract

An image display apparatus is provided for performing image display by dividing one frame period into a plurality of sub-frame periods, determining a gradation level of each of the sub-frame periods in accordance with a gradation level of an input image signal and supplying the determined gradation level to an image display section. The image display apparatus comprises a display control section, wherein the display control section supplies a relatively largest gradation level in a relatively central sub-frame period which is at a time-wise center or closest to the time-wise center of one frame period, and supplies a sequentially lowered gradation level in a sub-frame period which is sequentially farther from the relatively central sub-frame period.

Description

Image display device and method, electronic installation, liquid crystal TV, liquid crystal monitoring apparatus medium
The application is that priority number is that JP2003-387269 and JP2004-332509, priority date are that November 17, China national application number in 2003 are 200410103368.7, are entitled as dividing an application of " image display device and method, electronic installation, liquid crystal TV, liquid crystal monitoring apparatus medium " and application.
This non-provisional application require 35U.S.C. 119 (a) lower take on November 17th, 2003 Japan's submission, number of patent application is as the right of priority of No.2003-387269, and on November 16th, 2004 submit in Japan, number of patent application is the right of priority of No.2004-332509, by reference its full content is included in herein at this.
Background of invention
1. invention field:
The present invention relates to use the image display device of handheld display device, this handheld display device such as, liquid crystal display or EL (electroluminescence) display device for example; Electronic installation, liquid crystal TV, liquid crystal monitoring apparatus medium, they have used image display device to be used as the display part; Method for displaying image uses this image display device to realize that image shows; Display control program is used for allowing computing machine to carry out this method for displaying image; And computer readable recording medium storing program for performing, record this display control program on it.
2. the explanation of correlation technique:
Traditional image display device is divided into impulse type display device such as CRT (cathode-ray tube (CRT)), film projector etc. haply; And the handheld display device of using handheld display device, this handheld display device such as liquid crystal display, EL display device and similar above-mentioned equipment.
In the impulse type display device, show the light period of image and do not have the shown dark period of image to be alternately repeated.Consider that human eye is perceived as gray scale with brightness, this brightness is the brightness of image to be changed carry out time integral and obtain, during large approximate number frame in this image in fact be displayed on this screen.Therefore, human eye can be observed the image that is presented on the image display device under the sensation of nature, and in the image display device such such as the impulse type display device, brightness changed within a frame or shorter period.Figure 46 show when an object in traditional impulse-type image display apparatus during along with a static background horizontal ground motion brightness according to time of a horizontal line in the screen change.In Figure 46, transverse axis is illustrated in the luminance state of the horizontal direction (position of pixel portion in the horizontal direction) of this screen, and the longitudinal axis represents the time.Figure 46 shows with 3 frames and is presented at image on the screen.
In Figure 46, each frame period T101 is the one-period of update image.In impulse-type image display apparatus shown in Figure 46, light period T102 is the place that begins at each frame period T101.Dark period T103 follows in the back of light period T102, until image is updated in next frame.In dark period T103, brightness is minimum.
For the show state of a horizontal line, the display part A of Moving Objects is sandwiched between the display part B of static background.When the frame by frame update image, display part A is to the right motion just.
Noticing that the observer's of display part A eyes are following display part A, thereby moving in the direction that oblique bold arrow represents.By being changed, the brightness on the direction of object motion carries out the value that time integral obtains, as the brightness of human eye perceives.
Figure 47 shows the Luminance Distribution by the image shown in the viewed Figure 46 of the observer's who is noting Moving Objects eyes.
In the situation of impulse-type image display apparatus, the cycle between image update and the next image update is mainly dark period T103.In dark period T103, brightness is enough low to the brightness that can not offer time integral (value of the longitudinal axis).As a result, observer's eyes are clear that the difference in brightness of the boundary between static background and Moving Objects.Therefore, observer's eyes can clearly be distinguished background and object.
Consider that aspect the quality of moving image, handheld image display device is poorer than impulse-type image display apparatus.This will be described in detail below.
Figure 48 shows the brightness that changes along with time of the horizontal line in the screen during along with the static background horizontal ground motion when object in general traditional handheld image display device changes.In Figure 48, transverse axis is illustrated in the luminance state (position of pixel portion in the horizontal direction) on the horizontal direction of screen, and the longitudinal axis represents the time.Figure 48 shows with 3 frames and is presented at image on the screen.
In Figure 48, from different among Figure 46, each frame period T101 is whole to be light period T102.Dark period is not provided.
Figure 49 shows the Luminance Distribution by the image shown in viewed Figure 48 of eyes of the observer who notes Moving Objects.
Because a frame period T101 is whole to be light period T102, so the object that shows remains on identical position from image update to next image update the time.As a result, the value that the time integral that is changed by brightness on the direction of motion of object obtains can not reflect that static background and Moving Objects are in the difference in brightness of edge.Therefore, observer's eyes are regarded this edge as motion blur.This is a reason of the poor image quality of general traditional handheld image display device.
A solution of this problem of handheld image display device is the duration with light period to reduce to only about half of, and one-period is provided, and in this cycle, it is to realize in minimum brightness level (minimum brightness cycle) that image shows.Hereinafter, this system will be known as " minimum (brightness) insertion system ".
Figure 50 shows when an object is being suitable in traditional handheld image display device of minimum (brightness) insertion system with a static background horizontal ground motion brightness that the time with the horizontal line of screen changes to be changed.In Figure 50, transverse axis is illustrated in the luminance state on the horizontal direction (position of pixel portion in the horizontal direction) of screen, and the longitudinal axis represents the time.Figure 50 shows with 3 frames and is presented at image on the screen.
In Figure 50, from different in Figure 48, each frame period T101 comprises 1/2-frame dark period (perhaps minimum brightness cycle or minimum (brightness) insertion cycle) T103.
Figure 51 shows the viewed Luminance Distribution at image shown in Figure 50 of eyes by the observer who notes Moving Objects.
Compare with the general traditional handheld image display device shown in Figure 49, the motion blur shown in Figure 51 has been alleviated.
Yet, in the traditional handheld image display device that is suitable for minimum (brightness) insertion system, even be when realizing with maximum gray scale when image shows, each frame period comprises the minimum brightness cycle (perhaps minimum (brightness) insertion cycle or dark period).Therefore, the high-high brightness of being felt by observer's eyes is half in the general traditional handheld image display device that is unsuitable for this minimum (brightness) insertion system.
Especially ought launch by the light of nature the display device of bright dipping, such as the EL display device, when being used to this handheld image display device, compare with the general traditional handheld image display device that is unsuitable for minimum (brightness) insertion system, the minimizing of high-high brightness aspect is inevitable.
Another solution to this problem of motion blur has been proposed to be used in transmissible display device, such as transmissible liquid crystal display etc.According to the method for advising, identical approx with the maximum brightness level of the general traditional handheld image display device that is unsuitable for minimum (brightness) insertion system in order to guarantee, increase the brightness of this background illumination.
This solution of advising has following shortcoming.The first, improved the power consumption of background illumination.The second, even when realizing that with minimum brightness (black cycle) this image shows, can transmit by this display device from the light of background illumination.Therefore, minimum brightness level can not be identical approx with the minimum brightness level of the handheld image display device that is unsuitable for this minimum (brightness) insertion system.As a result, reduced contrast.
In order for example to guarantee by the problem that solves motion blur and be unsuitable for minimum (brightness) thereby the maximum brightness level of general traditional handheld image display device of the insertion system quality of identical improvement moving image approx that the open No.2001-296841 of Japan's special permission has proposed following method for displaying image with claim 27 to 41.In the example 7 of the open No.2001-296841 of Japan special permission, describe in detail a kind of for driving this display device and the ad hoc approach of the picture signal of certain gray level being provided.This with the open No.2001-296841 of Japan special permission all in conjunction with as a reference.
Method for displaying image according to being advised by the open No.2001-296841 of Japan's special permission uses two period of sub-frame, and namely the first period of sub-frame and the second period of sub-frame realize that the image of a frame shows.When the gray level of received image signal is 0% or larger and less than 50% the time, the picture signal of 0% to 100% gray level is provided in the first period of sub-frame, and the picture signal of 0% gray level is provided in the second period of sub-frame.When the gray level of received image signal is 50% or larger and less than 100% the time, the picture signal of 0% to 100% gray level is provided in the first period of sub-frame, and the picture signal of 100% gray level is provided in the second period of sub-frame.
Figure 52 show when an object in the open handheld image display device of the disclosed tradition of No.2001-296841 by Japan special permission during along with a static background horizontal ground motion, along with time of the horizontal line in the screen changes and changes brightness and change.In Figure 52, transverse axis is illustrated in the luminance state on the horizontal direction (position of pixel portion in the horizontal direction) of screen, and the longitudinal axis represents the time.Figure 52 shows with 3 frames and is presented at image on this screen.
In Figure 52, from different among Figure 48, each frame period T101 comprises two period of sub-frame T201 and T202.
This is with for a more detailed description.As shown in Figure 52, for the display part B of this static background, the gray level of received image signal is very low.Therefore, display part B only is in luminance in the first period of sub-frame T201, and is to be in not luminance (0%) in the second period of sub-frame T202.For the display part A of this Moving Objects, the gray level of received image signal is enough high.Therefore, display part A is in luminance in high-high brightness (100%) in the second period of sub-frame T202, and is in luminance with the picture signal of 0% to 100% gray level in 20% brightness in the first period of sub-frame T201.With the numeral of " % " intensity level with respect to the image of 100% maximum display capabilities.For example, be used for the brightness of the numeral 40% of being surrounded by dotted line of B1.
This method for displaying image can guarantee the approximately uniform maximum brightness level of maximum brightness level with the traditional handheld image display device that is unsuitable for minimum (brightness) insertion system, and can improve the quality of moving image, in this moving image, the gray level of received image signal is sufficiently low.
The open No.2001-296841 of Japan special permission discloses the another kind of method of minimizing of the brightness aspect of the handheld image display device that is used for suppressing being suitable for minimum (brightness) insertion system.According to by the open disclosed method of No.2001-296841 of Japan special permission, a frame period comprises a plurality of period of sub-frame, and according to the brightness of received image signal, the brightness of the frame in the frame of back is weakened with the ratio of defined.Therefore, can prevent the motion blur in general traditional handheld image display device, felt truly.Therefore because one brightness as mentioned above in the period of sub-frame of back is weakened and be not 0%, so compare with the traditional handheld image display device that is suitable for minimum (brightness) insertion system shown in 51 with Figure 50, can suppress the minimizing of brightness.
For the image that shows with the object of a static background tangential movement, as long as the gray level of received image signal is enough low, just can provide the effect identical in fact with the traditional handheld image display device that is suitable for minimum (brightness) insertion system shown in Figure 50 and 51 by the open disclosed traditional images display device of No.2001-296841 of Japan's special permission.Yet, when the gray level of received image signal was very high, following problem can appear.
Figure 53 shows by the observer's who notes Moving Objects eyes viewed in the distribution aspect the brightness of the image shown in Figure 52.
As shown in Figure 53, the part of this image is brighter than original image, and another part of this image is darker than original image.As a result, observer's eyes are seen singularly bright and dark part singularly in the front end of Moving Objects or end, and these parts be can't see in still image.This has reduced the quality of moving image.
Thisly see that reason bright and singularly dark part is singularly, the time state of the center of gravity of light period (time-wise) center be when the gray level of received image signal less than 50% and between the gray level of received image signal is more than or equal to 50% than big difference.For example, when the gray level of input signal image less than 50% the time, the time state center of the center of gravity of brightness is the first period of sub-frame T201 in light period, because the picture signal of 0% gray level is provided in the second period of sub-frame T202.When the gray level of received image signal more than or equal to 50% the time, the time state center of the center of gravity of light period (display brightness) is the second period of sub-frame T202, because the picture signal of 100% gray level is provided in the second period of sub-frame T202.For this reason, the value that obtains according to the time integral that changes by the brightness on the direction of motion of this object is at the front end of Moving Objects with terminally seen singularly bright and dark part singularly.
Current, consider gamma (gamma) light characteristic of CRT (cathode-ray tube (CRT)) mainly to produce and exported general picture signal, for example TV broadcast singal, rabbit signal and PC (personal computer) picture signal.For consistent with general picture signal, use the display board of handheld display device usually to have the gamma light characteristic identical in fact with CRT, this handheld display device is such as liquid crystal display and EL display device.
Figure 54 is the curve map of the relation between the gray level of explanation received image signal and the display brightness of display board with this gamma light characteristic.As shown in Figure 54, this relation represents to the curve than low-light level with general recessed.Thus, be appreciated that the point of 50% brightness and the point of 50% gray level do not mate mutually.
Figure 55 shows when realizing such as the demonstration control described in the example 7 of the open No.2001-296841 of Japan special permission with the handheld image display with gamma light characteristic, the gray level of input signal and corresponding to the relation between the time integral brightness of the brightness of being felt by observer's eyes.
In the example 7 of the open No.2001-296841 of Japan special permission, when the gray level of received image signal more than or equal to 50% the time, in two period of sub-frame (the first and second period of sub-frame), provide picture signal.On the contrary, when the gray level of received image signal less than 50% the time, only (only in the first period of sub-frame) provides picture signal in a period of sub-frame.Therefore, have two curves on the point of therein 50% brightness of the heart of luminosity response.Adopt this luminosity response, can not realize the reproducibility between suitable color and the general received image signal.
This image is placed at the luminance among of period of sub-frame of back in each frame period by the open disclosed method of No.2001-296841 of Japan special permission, and therefore compare with the general handheld image display device that is suitable for minimum (brightness) insertion type shown in 51 with Figure 50, can be suppressed at the minimizing of brightness and contrast aspect.Yet this method can't provide a kind of useful effect be used to preventing motion blur.In addition, the contrast that obtains by this method is lower than the contrast of general traditional handheld image display device.
Summary of the invention
According to a first aspect of the present invention, a kind of image display device is provided, be used for realizing that by being divided into a plurality of period of sub-frame a frame period, determining the gray level of each period of sub-frame and determined gray level is offered image displaying part according to the gray level of received image signal image shows.This image display device comprises:
Display control section, wherein display control section offers the relatively maximum gray level in the relatively central period of sub-frame at the time state center in one frame period, this relatively central period of sub-frame is at the time state center or the most nearby, and constantly relatively provides the gray level that is lowered continuously in the period of sub-frame away from the period of sub-frame of central authorities at one.
In an embodiment of a first aspect of the present invention, when the gray scale of received image signal relatively hour, display control section offers all period of sub-frame with relatively minimum gray level; And
When the gray scale of received image signal was relatively maximum, display control section offered all period of sub-frame with relatively maximum gray level.
In an embodiment of a first aspect of the present invention, by be provided to the gray level in each period of sub-frame by image displaying part control, display control section realizes that image shows, so that the light characteristic of feeling corresponding to the time integral value representation of the brightness of received image signal.
According to a second aspect of the present invention, an image display device is provided, be used for by ask in n period of sub-frame (wherein n is integer 2 or larger integer) time integral value that is displayed on the brightness in the image displaying part with, realize the image demonstration of a frame.This image display device comprises:
The image control part is used for realizing that in image displaying part the image of n period of sub-frame shows control in each frame period, wherein:
In relatively central period of sub-frame, namely in the time state center or the time of closest approach state center that are used for the frame period that image shows, display control section be provided to image displaying part n the brightness in the period of sub-frame integrated value with do not have above the picture signal corresponding to a relative maximum gray scale in the scope of the intensity level of the gray level of received image signal;
When the time integral value of the brightness in the period of sub-frame in relative central authorities and when not reaching intensity level corresponding to the gray level of received image signal, in the period of sub-frame of each front before central period of sub-frame and the period of sub-frame afterwards after central period of sub-frame, display control section be provided to image displaying part n the brightness in the period of sub-frame time integral value with the picture signal that does not have to surpass corresponding to the relative maximum gray scale in the scope of the intensity level of the gray level of received image signal;
When the time integral value of brightness in the period of sub-frame of relatively period of sub-frame, the front of central authorities and period of sub-frame afterwards and when not reaching yet intensity level corresponding to the gray level of input picture, in the period of sub-frame of each front before central period of sub-frame and the period of sub-frame afterwards after central period of sub-frame, display control section be provided to image displaying part the brightness in this n period of sub-frame time integral value with the picture signal that does not have to surpass corresponding to one in the scope of the intensity level of the gray level of received image signal relative maximum gray level;
Display control section repeats this operation, until the time integral value of the brightness in all period of sub-frame of this picture signal are provided and reach intensity level corresponding to the gray level of received image signal; And
When this with when reaching intensity level corresponding to the gray level of received image signal, display control section provides the picture signal of relatively minimum gray level or is lower than the picture signal of the gray level of the value of defined in the residue period of sub-frame to image displaying part.
According to a third aspect of the present invention, a kind of image display device is provided, be used for by ask n period of sub-frame (wherein n is the odd number more than or equal to 3) be displayed on the brightness in the image displaying part time integral value and, realize the image demonstration of a frame.This image display device comprises:
Display control section is used for realizing that in image displaying part the image of n period of sub-frame shows control in each frame period, wherein:
This period of sub-frame be known as since upper nearest period of sub-frame of time or since the time the latest period of sub-frame the first period of sub-frame, the second period of sub-frame ..., the n period of sub-frame; And the supercentral period of sub-frame of time state that is used for a frame period of image demonstration is known as the m period of sub-frame, wherein m=(n+1)/2;
(n+1)/2 a threshold level is provided for the gray level of received image signal, and from the Minimum Threshold level, this threshold level be known as T1, T2 ..., T[(N+1)/2];
When the gray level of received image signal is equal to or less than T1, display control section provides the picture signal of a gray level to image displaying part, and in other period of sub-frame the relative picture signal of minimal gray level or less than the picture signal of the value of defined, this gray level increases or reduces according to the gray level of the received image signal in the m period of sub-frame;
When the gray level of received image signal greater than T1 and when being equal to or less than T2, display control section is provided in the m period of sub-frame picture signal of relative maximum gray scale or greater than the picture signal of the gray level of the value of defined to image displaying part, the picture signal of the gray level that in each of (m-1) period of sub-frame and (m+1) period of sub-frame, is reduced according to the gray level of received image signal or increases, and in other period of sub-frame the relative picture signal of minimal gray level or be lower than the picture signal of gray level of the value of defined;
When the gray level of received image signal greater than T2 and when being equal to or less than T3, display control section is provided at the m period of sub-frame to image displaying part, the picture signal of relative maximum gray scale or greater than the picture signal of the gray level of the value of defined in each of (m-1) period of sub-frame and (m+1) period of sub-frame, the picture signal of the gray level that in each of (m-2) period of sub-frame and (m+2) period of sub-frame, is reduced according to the gray level of received image signal or increases, and in other period of sub-frame the relative picture signal of maximum gray scale or be lower than the picture signal of gray level of the value of defined; And by this way, when the gray level of received image signal greater than Tx-1 (x is the integer more than or equal to 4) and when being equal to or less than Tx, display control section is provided in each of [m-(x-2)] period of sub-frame to the [m+ (x-2)] period of sub-frame the relative picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to image displaying part, the picture signal of the gray level that in each of [m-(x-1)] period of sub-frame to the [m+ (x-1)] period of sub-frame, is reduced according to the gray level of received image signal or increases, and in other period of sub-frame the relative picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined.
According to a fourth aspect of the present invention, a kind of image display device is provided, it be used for by ask in n period of sub-frame (wherein n is the even number more than or equal to 2) time integral value that is displayed on the brightness in the image displaying part with, realize the image demonstration of a frame.This image display device comprises:
Display control section is used for realizing that in image displaying part the image of n period of sub-frame shows control in each frame period, wherein:
This period of sub-frame be known as since upper nearest period of sub-frame of time or since the time the latest period of sub-frame the first period of sub-frame, the second period of sub-frame ..., the n period of sub-frame; And what be used for that image shows is known as m1 period of sub-frame and m2 period of sub-frame, wherein m1=n/2, and m2=n/2+1 near two period of sub-frame at the time state center in a frame period;
N/2-threshold level is provided for the gray level of received image signal, and from the Minimum Threshold level, this threshold level be known as T1, T2 ..., T[N/2];
When the gray level of received image signal is equal to or less than T1, display control section is provided in each of m1 period of sub-frame and m2 period of sub-frame the picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part, the relative picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined in other period of sub-frame;
When the gray level of received image signal greater than T1 and when being equal to or less than T2, display control section is provided at the picture signal of relative maximum gray level in each of m1 period of sub-frame and m2 period of sub-frame or greater than the picture signal of the gray level of the value of defined to image displaying part, the picture signal of the gray level that in each of (m1-1) period of sub-frame and (m2+1) period of sub-frame, is increased according to the gray level of received image signal or reduces, and in other period of sub-frame the relative picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined;
When the gray level of received image signal greater than T2 and when being equal to or less than T3, display control section is provided at the m1 period of sub-frame to image displaying part, the m2 period of sub-frame, the picture signal of relative maximum gray scale or greater than the picture signal of the gray level of the value of defined in each of (m1-1) period of sub-frame and (m2+1) period of sub-frame, the picture signal of the gray level that in each of (m1-2) period of sub-frame and (m2+2) period of sub-frame, is increased according to the gray level of received image signal or reduces, and in other period of sub-frame the relative picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined; And by this way,
When the gray level of received image signal greater than Tx-1 (x is the integer more than or equal to 4) and when being equal to or less than Tx, display control section is provided in each of [m1-(x-2)] period of sub-frame to the [m2+ (x-2)] period of sub-frame the relative picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to image displaying part, in the picture signal of the gray level that in each of [m1-(x-1)] period of sub-frame to the [m2+ (x-1)] period of sub-frame, is increased according to the gray level of received image signal or reduces, and in other period of sub-frame the relative picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined.
According to a fifth aspect of the present invention, a kind of image display device is provided, be used for by ask two period of sub-frame the time integral value that is displayed on the brightness in the image displaying part and, realize that the image of a frame shows.This image display device comprises:
Display control section is used for realizing that in image displaying part the image of two period of sub-frame shows control in each frame period, wherein:
A period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β;
When the gray level of received image signal is equal to or less than by well-determined threshold level, display control section is provided among the period of sub-frame α to image displaying part that gray level according to received image signal is increased or the picture signal of the gray level that reduces, and in period of sub-frame β the relative picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined; And
When the gray level of received image signal during greater than this threshold level, display control section is provided in period of sub-frame α the picture signal of relative maximum gray scale or greater than the picture signal of the value of defined to image displaying part, and is increased according to the gray level of received image signal in period of sub-frame β or the picture signal of the gray level that reduces.
According to a sixth aspect of the present invention, a kind of image display device is provided, be used for by ask two period of sub-frame the time integral value that is displayed on the brightness in the image displaying part and, realize that the image of a frame shows.This image display device comprises:
Display control section is used for realizing that in image displaying part the image of two period of sub-frame shows control in each frame period, wherein:
A period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β; And the threshold level T1 and the T2 that have stipulated gray level in these two period of sub-frame, and threshold level T2 is greater than threshold level T1;
When the gray level of received image signal is equal to or less than threshold level T1, display control section is provided among the period of sub-frame α picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part, and in period of sub-frame β the relative picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined;
When the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, display control section is provided among the period of sub-frame α picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part, and in period of sub-frame β less than being provided at the gray level among the period of sub-frame α and being increased according to the gray level of received image signal or the picture signal of the gray level that reduces; And
When the gray level of received image signal during greater than threshold level T2, display control section is provided at the picture signal of relatively maximum period of sub-frame gray level among the period of sub-frame α or greater than the picture signal of the gray level of the value of defined to image displaying part, and is increased according to the gray level of received image signal in period of sub-frame β or the picture signal of the gray level that reduces.
According to a seventh aspect of the present invention, a kind of image display device is provided, be used for by ask two period of sub-frame the time integral value that is displayed on the brightness in the image displaying part and, realize that the image of a frame shows.This image display device comprises:
Display control section is used for realizing that in image displaying part the image of two period of sub-frame shows control in each frame period, wherein:
A period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β; Threshold level T1 and the T2 of gray level in two period of sub-frame, have been stipulated; And threshold level L is determined by unique;
When the gray level of received image signal is equal to or less than threshold level T1, display control section is provided among the period of sub-frame α picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part, and in period of sub-frame β the relative picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined;
When the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, display control section is provided at the picture signal of the gray level L among the period of sub-frame α to image displaying part, and is increased according to the gray level of received image signal in period of sub-frame β or the picture signal of the gray level that reduces; And
When the gray level of received image signal during greater than threshold level T2, display control section is provided among the period of sub-frame α picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part, and in period of sub-frame β the relative picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined.
According to a eighth aspect of the present invention, a kind of image display device is provided, be used for two period of sub-frame by ask the time integral value that is displayed on the brightness in the image displaying part and, realize that the image of a frame shows.This image display device comprises:
Display control section is used for realizing that in image displaying part the image of two period of sub-frame shows control in each frame period, wherein:
Display control section is by the estimation based on two two field pictures of being inputted continuously, produces one according to the mediate image of state of time;
A period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β;
In period of sub-frame α, when the gray level of received image signal was equal to or less than by well-determined threshold level, display control section provided the picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part; And when the gray level of received image signal during greater than this threshold level, display control section provides the picture signal of relative maximum gray scale or greater than the picture signal of the gray level of the value of defined to image displaying part; And
In period of sub-frame β, when the gray level of the received image signal of the state of mediating was equal to or less than this threshold level, display control section provided the picture signal of relative minimal gray level or less than the picture signal of the gray level of the value of defined to image displaying part; And when the gray level of the picture signal of the state of mediating during greater than this threshold level, display control section provides according to the gray level of the picture signal of the state of mediating to image displaying part and is increased or the picture signal of the gray level that reduces.
According to a ninth aspect of the present invention, a kind of image display device is provided, be used for by ask two period of sub-frame the time integral value that is displayed on the brightness in the image displaying part and, realize that the image of a frame shows.This image display device comprises:
Display control section is used for realizing that in image displaying part the image of two period of sub-frame shows control in each frame period, wherein:
A period of sub-frame is known as period of sub-frame α, and other period of sub-frame is known as period of sub-frame β;
In period of sub-frame α, when the gray level of received image signal was equal to or less than by well-determined threshold level, display control section provided the picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part; And when the gray level of received image signal during greater than the threshold level, display control section provides the picture signal of relative maximum gray scale or greater than the picture signal of the gray level of the value of defined to image displaying part; And
In period of sub-frame β, when before the gray level of the picture signal in current frame period and the frame or after the frame and the mean value of the gray level of the picture signal that is transfused to when being equal to or less than the threshold level, display control section provides the picture signal of relative minimal gray level or less than the picture signal of the gray level of the value of defined to image displaying part; And when this mean value during greater than this threshold level, display control section provides the picture signal of the gray level that is increased according to this mean value or reduces to image displaying part.
In an embodiment of a first aspect of the present invention, period of sub-frame has to each other equal length or is different from each other length.
In an embodiment of a first aspect of the present invention, the display control section setting is provided at the upper limit of the gray level of the picture signal in each frame period.
In an embodiment of a first aspect of the present invention, wherein be provided at first, second ..., the picture signal in the n period of sub-frame the upper limit of gray level be known as respectively L1, L2 ..., Ln; And be in the period of sub-frame time state center or time of closest approach state center in the frame period and be known as the j period of sub-frame, display control section arranges this upper limit, in order to realize:
L[j-i]≥L[j-(i+1)]；
L[j+i]≥L[j+(i+1)]
Wherein i is equal to, or greater than 0 and less than the integer of j.
In an embodiment of a first aspect of the present invention, after being increased according to the gray level of received image signal or reducing, the image displaying part setting is provided at the gray level of the picture signal in each period of sub-frame, so that the relation between the time integral value of the gray level of received image signal and brightness represents suitable gamma light characteristic in a frame period.
In an embodiment of a first aspect of the present invention, this image display device comprises that also the gamma light characteristic arranges part, is used for from outer setting gamma light characteristic, wherein:
Display control section can change by the gamma light characteristic and part is set from the gamma light characteristic of outer setting.
In an embodiment of a first aspect of the present invention, image display device also comprises a temperature detection part, and it is for detection of display board or near the temperature it, wherein:
According to the temperature that is detected by temperature detection part, after being increased according to the gray level of received image signal or reducing, the display control section setting is provided at the gray level of the picture signal in each frame period.
In an embodiment of a first aspect of the present invention, wherein received image signal has a plurality of colour components, the display control section setting is provided at the gray level of the picture signal in each frame period, so as to be displayed in each frame period of color rather than have ratio between the intensity level of color of high grade grey level of received image signal equal to have received image signal high grade grey level color be displayed on ratio between the intensity level in each period of sub-frame.
In an embodiment of a first aspect of the present invention, wherein these a plurality of period of sub-frame are three or more period of sub-frame, and the gray level that is assigned to central period of sub-frame in a frame period is higher than the gray level that is assigned to other period of sub-frame at the place, end in a frame period.
In an embodiment of a first aspect of the present invention, wherein these a plurality of period of sub-frame are three or more period of sub-frame, and the intensity level that is assigned to the picture signal of central period of sub-frame in a frame period is higher than the intensity level that is assigned to the picture signal of other period of sub-frame at the place, end in a frame period.
In an embodiment of a first aspect of the present invention, move in a period of sub-frame in the time state center of the center of gravity of the time integral value of the brightness in these a plurality of period of sub-frame.
In an embodiment of a first aspect of the present invention, display control section has been realized the demonstration control on each of a plurality of pixel portion on the display screen.
In an embodiment of this invention, each pixel portion comprises the pixel of a pixel or specified quantity.
In an embodiment of a first aspect of the present invention, the gray level of the picture signal that in nearlyer period of sub-frame, is assigned be the picture signal that in the period of sub-frame of back, is assigned with gray level half or still less.
In an embodiment of a second aspect of the present invention, this period of sub-frame has mutually the same length or is different from each other length.
In an embodiment of a second aspect of the present invention, this display control section setting is provided at the upper limit of the gray level of the picture signal in each period of sub-frame.
In an embodiment of a second aspect of the present invention, wherein be provided at first, second ..., the picture signal in the n period of sub-frame the upper limit of gray level be known as respectively L1, L2 ..., Ln; And in the frame period in the time state center or the period of sub-frame at time of closest approach state center be known as the j period of sub-frame,
This display control section arranges this upper limit, in order to realize:
L[j-i]≥L[j-(i+1)]；
L[j+i]≥L[j+(i+1)]
Wherein i is equal to or greater than 0 and less than the integer of j.
In an embodiment of a second aspect of the present invention, after being increased according to the gray level of received image signal or reducing, the image displaying part setting is provided at the gray level of the picture signal in each period of sub-frame, so that the relation between the time integral value of the gray level of received image signal and the brightness in a frame period represents suitable gamma light characteristic.
In an embodiment of a second aspect of the present invention, this image display device comprises that also the gamma light characteristic arranges part, and it is used for from outer setting gamma light characteristic, wherein:
Display control section can change by the gamma light characteristic and part is set from the gamma light characteristic of outer setting.
In an embodiment of a second aspect of the present invention, image display device also comprises temperature detection part, and it is for detection of display board or near the temperature it, wherein:
According to the temperature that is detected by temperature detection part, after being increased according to the gray level of received image signal or reducing, the display control section setting is provided at the gray level of the picture signal in each period of sub-frame.
In an embodiment of a second aspect of the present invention, received image signal has a plurality of colour components, the display control section setting is provided at the gray level of the picture signal in each period of sub-frame, in order to be displayed on the ratio between the intensity level in each period of sub-frame of the color except the color of the high grade grey level of received image signal, equal to be displayed on the ratio of the intensity level in each period of sub-frame of color of the high grade grey level with received image signal.
In an embodiment of a second aspect of the present invention, gray level greater than 90% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 10% less than the gray level of the value of defined, and wherein minimum gray level is 0%.
In an embodiment of a second aspect of the present invention, corresponding to the gray level greater than 90% intensity level greater than the gray level of the value of defined, wherein relatively maximum intensity level is 100%, and be that wherein relatively minimum intensity level is 0% corresponding to the gray level less than 10% intensity level less than the gray level of the value of defined.
In an embodiment of a second aspect of the present invention, gray level greater than 98% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 2% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of a second aspect of the present invention, corresponding to the gray level greater than 98% intensity level greater than the gray level of the value of defined, wherein relatively maximum intensity level is 100%, and be that wherein relatively minimum gray level is 0% corresponding to the gray level less than 2% intensity level less than the gray level of the value of defined.
In an embodiment of a second aspect of the present invention, wherein these a plurality of period of sub-frame are three or more period of sub-frame, and the gray level that is assigned in a frame period in the central period of sub-frame is higher than the gray level that is assigned to other period of sub-frame at the place, end in a frame period.
In an embodiment of a second aspect of the present invention, move in a period of sub-frame in the time state center of the center of gravity of the time integral value of the brightness in a plurality of period of sub-frame.
In an embodiment of a second aspect of the present invention, display control section is realizing showing control in each of a plurality of pixel portion on the display screen.
In an embodiment of this invention, each pixel portion comprises the pixel of a pixel or specified quantity.
In an embodiment of a third aspect of the present invention, this period of sub-frame has mutually the same length or is different from each other length.
In an embodiment of a third aspect of the present invention, the m period of sub-frame has the length longer than other period of sub-frame.
In an embodiment of a third aspect of the present invention, the display control section setting is provided at the upper limit of the gray level of the picture signal in each period of sub-frame.
In an embodiment of a third aspect of the present invention, wherein be provided at first, second ..., the picture signal in the n period of sub-frame the upper limit of gray level be known as respectively L1, L2 ..., Ln; And the period of sub-frame that is in time state center or time of closest approach state center in the frame period is known as the j period of sub-frame,
This display control section arranges this upper limit, in order to realize:
L[j-i]≥L[j-(i+1)]；
L[j+i]≥L[j+(i+1)]
Wherein i is equal to or greater than 0 and less than the integer of j.
In an embodiment of a third aspect of the present invention, display control section arranges with threshold level for referencial use, this reference is for the gray level of the picture signal that is provided at each period of sub-frame, and be provided with the gray level that is provided at the picture signal in each period of sub-frame so as in the gray level of received image signal and the relation between the time integral value of brightness in during the frame period represent suitable gamma light characteristic.
In an embodiment of a third aspect of the present invention, image display device comprises that also a gamma light characteristic arranges part, and it is used for from this gamma light characteristic of outer setting, wherein:
Display control section can change by the gamma light characteristic and part is set from the gamma light characteristic of outer setting.
In an embodiment of a third aspect of the present invention, image display device also comprises a temperature detection part, and it is for detection of display board or near the temperature it, wherein:
According to the temperature that is detected by temperature detection part, display control section arranges with threshold level for referencial use, this reference is used for being provided at the gray level of the picture signal of each period of sub-frame, and is provided with the gray level that is provided at the picture signal in each period of sub-frame after being increased according to the gray level of received image signal or reducing.
In an embodiment of a third aspect of the present invention, wherein received image signal has a plurality of colour components, the display control section setting is provided at the gray level of the picture signal in each period of sub-frame, in order to be displayed on the ratio between the intensity level in each period of sub-frame of color that ratio between the intensity level in each period of sub-frame of the color except the color of high grade grey level with received image signal equals to be displayed on the high grade grey level with received image signal.
In an embodiment of a third aspect of the present invention, wherein n is 3, and display control section comprises:
The timing controlled part;
Row data memory portion, it is used for receiving and keeping in the picture signal of a horizontal line;
Frame memory data selection part, partly controlled by timing controlled, in order to select (i) to send data to the frame data memory portion from row data memory portion, perhaps 1/4 frame of input and the data of from the frame data memory portion, reading before (ii) output, and 3/4 frame of input before the output and the data of from the frame data memory portion, reading;
Selection part in greyscale transformation source is partly controlled by timing controlled, in order to select (i) output from the data of row data memory portion or (ii) export 3/4 frame of in the past input and the data that provide from frame memory data selection part;
The first gradation conversion part, the gray level that it is used for picture signal is relative greatest level from frame memory data selection Partial Transformation, perhaps greater than the gray level of the value of defined, the gray level that perhaps is increased or reduces according to the gray level of received image signal;
The second gradation conversion part, it is used for selecting part to be transformed to relative minimum level from the greyscale transformation source gray level of picture signal, perhaps less than the gray level of the value of defined, the gray level that perhaps is increased or reduces according to the gray level of received image signal; And
Output data selection part is partly controlled by timing controlled, is used for selecting from the picture signal of the first gradation conversion part or from the second gradation conversion picture signal partly, and the picture signal of selecting is offered image displaying part.
In an embodiment of a third aspect of the present invention, gray level greater than 90% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 10% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of a third aspect of the present invention, corresponding to the gray level greater than 90% intensity level greater than the gray level of the value of defined, wherein maximum brightness level is 100% relatively, and be that wherein minimum brightness level is 0% relatively corresponding to the gray level less than 10% intensity level less than the gray level of the value of defined.
In an embodiment of a third aspect of the present invention, gray level greater than 98% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 2% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of a third aspect of the present invention, corresponding to the gray level greater than 98% intensity level greater than the gray level of the value of defined, wherein maximum brightness level is 100% relatively, and be that wherein minimum brightness level is 0% relatively corresponding to the gray level less than 2% intensity level less than the gray level of the value of defined.
In an embodiment of a third aspect of the present invention, wherein a plurality of period of sub-frame are three or more period of sub-frame, and the gray level that is dispensed on the central period of sub-frame in the frame period is higher than the gray level that is assigned in other period of sub-frame at place, a frame period end.
In an embodiment of a third aspect of the present invention, wherein these a plurality of period of sub-frame are three or more period of sub-frame, and the intensity level that is assigned to the picture signal on the central period of sub-frame in the frame period is higher than the intensity level of the picture signal of other period of sub-frame that is assigned to place, a frame period end.
In an embodiment of a third aspect of the present invention, move in a period of sub-frame in the time state center of the center of gravity of the time integral value of brightness in a plurality of period of sub-frame.
In an embodiment of a third aspect of the present invention, each of a plurality of pixel portion of display control section on display screen realizes showing control.
In an embodiment of this invention, each pixel portion comprises the pixel of a pixel or specified quantity.
In an embodiment of a fourth aspect of the present invention, this period of sub-frame has mutually the same length or is different from each other length.
In an embodiment of a fourth aspect of the present invention, the display control section setting is provided at the upper limit of the gray level of the picture signal in each period of sub-frame.
In an embodiment of a fourth aspect of the present invention, wherein be provided at first, second ..., the picture signal in the n period of sub-frame the upper limit of gray level be known as respectively L1, L2 ..., Ln; And a frame period at the time state center or the period of sub-frame at time of closest approach state center be known as the j period of sub-frame,
Display control section arranges the upper limit, in order to realize:
L[j-i]≥L[j-(i+1)]；
L[j+i]≥L[j+(i+1)]
Wherein i is equal to or greater than 0 and less than the integer of j.
In an embodiment of fourth aspect present invention, display control section arranges with threshold level for referencial use, this reference is for the gray level of the picture signal that is provided at each frame period, and be provided with the gray level that is provided at the picture signal in each period of sub-frame so as the gray level of received image signal and during a frame period in the time integral value of brightness between relation represent suitable gamma light characteristic.
In an embodiment of a fourth aspect of the present invention, image display device also comprises a gamma light characteristic, and it is used for from outer setting gamma light characteristic, wherein:
Display control section can change by the gamma light characteristic and part is set from the gamma light characteristic of outer setting.
In an embodiment of a fourth aspect of the present invention, image display device also comprises a temperature detection part, and it is for detection of display board or near the temperature it, wherein:
According to the temperature that is detected by temperature detection part, display control section arranges with threshold level for referencial use, this reference is used for being provided at the gray level of the picture signal of each period of sub-frame, and be arranged on be increased according to the gray level of received image signal or reduce after be provided at the gray level of the picture signal in each period of sub-frame.
In an embodiment of a fourth aspect of the present invention, wherein received image signal has a plurality of colour components, the display control section setting is provided at the gray level of the picture signal in each period of sub-frame, in order to be displayed on the ratio between the intensity level in each period of sub-frame of the color except the highest color that can pile up with received image signal, equal to be displayed on the ratio between the intensity level in each period of sub-frame of color of the high grade grey level with received image signal.
In an embodiment of a fourth aspect of the present invention, gray level greater than 90% greater than the gray level of the value of defined, wherein relatively maximum gray scale is 100%, and is gray level less than 10% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of a fourth aspect of the present invention, corresponding to the gray level greater than 90% intensity level greater than the gray level of the value of defined, wherein maximum brightness level is 100%, and be that wherein minimum brightness level is 0% relatively corresponding to the gray level less than 10% intensity level less than the gray level of the value of defined.
In an embodiment of a fourth aspect of the present invention, gray level greater than 98% greater than the gray level of the value of defined, wherein relatively maximum gray scale is 100%, and is gray level less than 2% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of a fourth aspect of the present invention, corresponding to the gray level greater than 98% intensity level greater than the gray level of the value of defined, wherein maximum brightness level is 100%, and be that wherein minimum brightness level is 0% relatively corresponding to the gray level less than 2% intensity level less than the gray level of the value of defined.
In an embodiment of a fourth aspect of the present invention, wherein these a plurality of period of sub-frame are three or more period of sub-frame, and the gray level that is dispensed on the central period of sub-frame in the frame period is higher than the gray level that is provided on other period of sub-frame of locating at a frame period end.
In an embodiment of a fourth aspect of the present invention, wherein these a plurality of period of sub-frame are three or more period of sub-frame, and the intensity level that is assigned to the picture signal on the central period of sub-frame in the frame period is higher than the intensity level of the picture signal on other period of sub-frame that is dispensed on place, a frame period end.
In an embodiment of a fourth aspect of the present invention, move in a period of sub-frame in the time state center of the center of gravity of the time integral value of brightness in a plurality of period of sub-frame.
In an embodiment of a fourth aspect of the present invention, each of a plurality of pixel portion of display control section on display screen realizes showing control.
In an embodiment of this invention, each pixel portion comprises the pixel of a pixel or specified quantity.
In an embodiment of a fifth aspect of the present invention, period of sub-frame has mutually the same length or is different from each other length.
In an embodiment of a fifth aspect of the present invention, be compared to when the response time for the image displaying part of the minimizing of intensity level aspect the intensity level aspect increase image displaying part response time in short-term, period of sub-frame α is configured to the second period of sub-frame in two period of sub-frame; And
Be compared to response time of image displaying part of increase of intensity level aspect when long when the response time for the image displaying part of the minimizing of intensity level aspect, period of sub-frame α is configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of a fifth aspect of the present invention, wherein the relative maximum brightness level of image displaying part is Lmax, and the relative minimum brightness level of image displaying part is Lmin,
When for the response time from the relative maximum brightness level of Lmax to the image displaying part of the brightness transition of the relative minimum brightness level of Lmin than the response time from the relative minimum brightness level of Lmin to the image displaying part of the brightness transition of the relative maximum brightness level of Lmax in short-term, period of sub-frame α is configured to the second period of sub-frame in two period of sub-frame; And
When for the response time from the relative maximum brightness level of Lmax to the image displaying part of the brightness transition of the relative minimum brightness level of Lmin when long to the response time of the image displaying part of the brightness transition of the relative maximum brightness level of Lmax from the relative minimum brightness level of Lmin, period of sub-frame α is configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of fifth aspect present invention, the display control section setting is provided at the upper limit of the gray level of the picture signal in each period of sub-frame.
In an embodiment of fifth aspect present invention, upper limit L1 is the gray level that is provided at the picture signal among of period of sub-frame, and upper limit L2 is the gray level that is provided at the picture signal in other period of sub-frame,
Display control section arranges L1 and L2, so that implementation relation L1 〉=L2.
In an embodiment of a fifth aspect of the present invention, display control section arranges with threshold level for referencial use, this reference is for the gray level of the picture signal that is provided at each period of sub-frame, and be provided with the gray level that is provided at the picture signal in each period of sub-frame so as the gray level of received image signal and during a frame period in the time integral value of brightness between relation represent suitable gamma light characteristic.
In an embodiment of a fifth aspect of the present invention, image display device also comprises a gamma light characteristic, and it is used for from outer setting gamma light characteristic, wherein:
Display control section can change by the gamma light characteristic and part is set from the gamma light characteristic of outer setting.
In an embodiment of fifth aspect present invention, image display device also comprises a temperature detection part, and it is for detection of display board or near the temperature it, wherein:
According to the temperature that is detected by temperature detection part, display control section arranges with threshold level for referencial use, this reference is used for being provided at the gray level of the picture signal of each period of sub-frame, and is provided with the gray level that is provided at the picture signal in each period of sub-frame after being increased according to the gray level of received image signal or reducing.
In an embodiment of a fifth aspect of the present invention, wherein received image signal has a plurality of colour components, the display control section setting is provided at the gray level of the picture signal in each period of sub-frame, in order to be displayed on the ratio between the intensity level in each period of sub-frame of the color except the color of high grade grey level with received image signal, equal to be displayed on the ratio between the intensity level in each period of sub-frame of color of the high grade grey level with received image signal.
In an embodiment of a fifth aspect of the present invention, display control section comprises:
The timing controlled part;
Row data memory portion, it is used for receiving and keeping in the picture signal of a horizontal line;
Frame memory data selection part is partly controlled by timing controlled, in order to select data are sent to the frame data memory portion from the data line memory portion, perhaps input before the frame and data data that read from the frame data memory portion are exported;
The first gradation conversion part, it is used for the gray level of picture signal is transformed into relative maximum level from row data memory portion, perhaps greater than the gray level of the value of defined, the gray level that perhaps is increased or reduces according to the gray level of received image signal;
The second gradation conversion part, it is used for the gray level of picture signal partly is transformed into minimum level from the frame memory data selection, perhaps less than the gray level of the value of defined, the gray level that perhaps is increased or reduces according to the gray level of received image signal; And
Output data selection part is partly controlled by timing controlled, is used for selecting from the picture signal of the first gradation conversion part or from the second gradation conversion picture signal partly, and the picture signal of selecting is offered image displaying part.
In an embodiment of a fifth aspect of the present invention, gray level greater than 90% greater than the gray level of the value of defined, wherein relatively maximum gray scale is 100%, and is gray level less than 10% less than the gray level of the value of defined, and wherein the minimal gray level is 0% relatively.
In first embodiment of a fifth aspect of the present invention, corresponding to the gray level greater than 90% intensity level greater than the gray level of the value of defined, wherein maximum brightness level is 100% relatively, and be that wherein minimum brightness level is 0% relatively corresponding to the gray level less than 10% intensity level less than the gray level of the value of defined.
In an embodiment of a fifth aspect of the present invention, gray level greater than 98% greater than the gray level of the value of defined, wherein relatively maximum gray scale is 100%, and is gray level less than 2% less than the gray level of the value of defined, and wherein the minimal gray level is 0% relatively.
In first embodiment of a fifth aspect of the present invention, corresponding to the gray level greater than 98% intensity level greater than the gray level of the value of defined, wherein maximum brightness level is 100% relatively, and be that wherein minimum brightness level is 0% relatively corresponding to the gray level less than 2% intensity level less than the gray level of the value of defined.
In an embodiment of fifth aspect present invention, each of a plurality of pixel portion of display control section on display screen realizes showing control.
In an embodiment of this invention, each pixel portion comprises the pixel of a pixel or specified quantity.
In an embodiment of sixth aspect present invention, period of sub-frame has mutually the same length or is different from each other length.
In an embodiment of sixth aspect present invention, when the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, setting is provided at the gray level of the picture signal among the period of sub-frame α and is provided at the gray level of the picture signal among the period of sub-frame β, so that the difference between the gray level is a constant, perhaps so that the difference between the intensity level in period of sub-frame α and the intensity level in period of sub-frame β is a constant.
In an embodiment of sixth aspect present invention, be dispensed on one early the gray level of the picture signal in the period of sub-frame be to be dispensed on than half of the gray level of the picture signal in the period of sub-frame of back or still less.
In an embodiment of a sixth aspect of the present invention, when the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, setting is provided at the gray level of the picture signal among the period of sub-frame α and is provided at the gray level of the picture signal among the period of sub-frame β, so that the relation between the gray level arranges with a function, perhaps so that the difference between the intensity level in period of sub-frame α and the intensity level in period of sub-frame β arranges with a function.
In an embodiment of sixth aspect present invention, be compared to when the response time for the image displaying part of the minimizing of intensity level aspect the intensity level aspect increase image displaying part response time in short-term, period of sub-frame α is configured to the second period of sub-frame in two period of sub-frame; And
Be compared to response time of image displaying part of increase of intensity level aspect when long when the response time for the image displaying part of the minimizing of intensity level aspect, period of sub-frame α is configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of sixth aspect present invention, wherein the relative maximum brightness level of image displaying part is Lmax, and the relative minimum brightness level of image displaying part is Lmin,
When be compared to for the response time from the relative maximum brightness level of Lmax to the image displaying part of the brightness transition of the relative minimum brightness level of Lmin from the relative minimum brightness level of Lmin to the image displaying part of the brightness transition of the relative maximum brightness level of Lmax response time in short-term, period of sub-frame α is configured to the second period of sub-frame in two period of sub-frame; And
When being compared to relative minimum brightness level from Lmin for the response time from the relative maximum brightness level of Lmax to the image displaying part of the brightness transition of the relative minimum brightness level of Lmin when long to the response time of the image displaying part of the brightness transition of the relative maximum brightness level of Lmax, period of sub-frame α is configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of sixth aspect present invention, the display control section setting is provided at the upper limit of the gray level of the picture signal in each period of sub-frame.
In an embodiment of sixth aspect present invention, wherein upper limit L1 is the gray level that is provided at a picture signal in the period of sub-frame, and upper limit L2 is the gray level that is provided at the picture signal in another period of sub-frame,
Display control section arranges L2 and L2, so that implementation relation L1 〉=L2.
In an embodiment of sixth aspect present invention, the display control section setting is as the threshold level of a reference, this reference is for the gray level of the picture signal that is provided at each period of sub-frame, and be provided with the gray level that is provided at the picture signal in each period of sub-frame so as the gray level of received image signal and during a frame period in relation between the time integral value of brightness represent suitable gamma light characteristic.
In an embodiment of this invention, image display device comprises that also a gamma light characteristic arranges part, and it is used for from outer setting gamma light characteristic, wherein:
Display control section can change by the gamma light characteristic and part is set from the gamma light characteristic of outer setting.
In an embodiment of sixth aspect present invention, image display device also comprises a temperature detection part, for detection of display board or near the temperature it, wherein:
According to the temperature that is detected by temperature detection part, the display control section setting is as the threshold level of a reference, this reference is used for being provided at the gray level of the picture signal of each period of sub-frame, and is provided with the gray level that is provided at the picture signal in each period of sub-frame after being increased according to the gray level of received image signal or reducing.
In an embodiment of sixth aspect present invention, wherein received image signal has a plurality of colour components, the display control section setting is provided at the gray level of the picture signal in each period of sub-frame, in order to be displayed on the ratio between the intensity level in each period of sub-frame of the color except the color of high grade grey level with received image signal, equal to be displayed on the ratio between the intensity level in each period of sub-frame of color of the high grade grey level with received image signal.
In an embodiment of sixth aspect present invention, display control section comprises:
The timing controlled part;
Row data memory portion, it is used for receiving and keeping in the view data of a horizontal line;
Frame memory data selection part is partly controlled by timing controlled, in order to select the data from the data line memory portion to the frame data memory portion to transmit, perhaps before the frame and data data that read from the frame data memory portion are exported;
The first gradation conversion part, it is used for the gray level of picture signal is transformed into relatively maximum level from row data memory portion, perhaps greater than the gray level of the value of defined, the gray level that perhaps is increased or reduces according to the gray level of received image signal;
The second gradation conversion part, it is used for the gray level of picture signal partly is transformed into relatively minimum level from the frame memory data selection, perhaps less than the gray level of the value of defined, the gray level that perhaps is increased or reduces according to the gray level of received image signal; And
Output data selection part is partly controlled by timing controlled, is used for selecting from the picture signal of the first gradation conversion part or from the second gradation conversion picture signal partly, and the picture signal of selecting is offered image displaying part.
In an embodiment of this invention, each of a plurality of pixel portion of display control section on display screen realizes showing control.
In an embodiment of sixth aspect present invention, gray level greater than 90% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 10% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of this invention, each of a plurality of pixel portion of display control section on display screen realizes showing control.
In an embodiment of sixth aspect present invention, corresponding to the gray level greater than 90% intensity level greater than the gray level of the value of defined, wherein relatively maximum intensity level is 100%, and be that wherein relatively minimum intensity level is 0% corresponding to the gray level less than 10% intensity level less than the gray level of the value of defined.
In an embodiment of sixth aspect present invention, gray level greater than 98% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 2% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of sixth aspect present invention, corresponding to the gray level greater than 98% intensity level greater than the gray level of the value of defined, wherein relatively maximum intensity level is 100%, and be that wherein relatively minimum intensity level is 0% corresponding to the gray level less than 2% intensity level less than the gray level of the value of defined.
In an embodiment of sixth aspect present invention, each of a plurality of pixel portion of display control section on display screen realizes showing control.
In an embodiment of this invention, each pixel portion comprises the pixel of a pixel or specified quantity.
In an embodiment of seventh aspect present invention, period of sub-frame has mutually the same length or is different from each other length.
In an embodiment of seventh aspect present invention, when the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, setting is provided at the gray level of the picture signal among the period of sub-frame α and is provided at the gray level of the picture signal among the period of sub-frame β, so that the difference between the gray level is a constant, perhaps so that the difference between the intensity level among the intensity level among the period of sub-frame α and the period of sub-frame β is a constant.
In an embodiment of this invention, the gray level that is dispensed on the picture signal in the period of sub-frame early is to be dispensed on than half of the gray level of the picture signal in the period of sub-frame of back or still less.
In an embodiment of seventh aspect present invention, when the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, setting is provided at the gray level of the picture signal among the period of sub-frame α and is provided at the gray level of the picture signal among the period of sub-frame β, in order to a function relation between the gray level is set, perhaps in order to a function intensity level among the period of sub-frame α and the relation between the intensity level among the period of sub-frame β are set.
In an embodiment of seventh aspect present invention, be compared to when the response time for the minimizing image displaying part of intensity level aspect the brightness aspect the increase image displaying part response time in short-term, period of sub-frame α is configured to the second period of sub-frame in two period of sub-frame; And
Be compared to response time of increase image displaying part of brightness aspect when long when the response time for the minimizing image displaying part of intensity level aspect, period of sub-frame α is configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of seventh aspect present invention, wherein the relative maximum brightness level of image displaying part is Lmax, and the relative minimum brightness level of image displaying part is Lmin,
When be compared to for the response time from the relative maximum brightness level of Lmax to the image displaying part of the brightness transition of the relative minimum brightness level of Lmin from the relative minimum brightness level of Lmin to the image displaying part of the brightness transition of the relative maximum brightness level of Lmax response time in short-term, period of sub-frame α is configured to the second period of sub-frame in two period of sub-frame; And
When being compared to relative minimum brightness level from Lmin for the response time from the relative maximum brightness level of Lmax to the image displaying part of the brightness transition of the relative minimum brightness level of Lmin when long to the response time of the image displaying part of the brightness transition of the relative maximum brightness level of Lmax, period of sub-frame α is configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of seventh aspect present invention, the display control section setting is provided at the upper limit of the gray level of the picture signal in each period of sub-frame.
In an embodiment of seventh aspect present invention, wherein upper limit L1 is the gray level that is provided at a picture signal in the period of sub-frame, and upper limit L2 is the gray level that is provided at the picture signal in another period of sub-frame,
Display control section arranges L1 and L2, so that implementation relation L1 〉=L2.
In an embodiment of seventh aspect present invention, display control section arranges with threshold level for referencial use, this reference is for the gray level of the picture signal that is provided at each period of sub-frame, and be provided with the gray level that is provided at the picture signal in each period of sub-frame so as the gray level of received image signal and during a frame period in the time integral value of brightness between relation represent a suitable gamma light characteristic.
In an embodiment of this invention, image display device comprises that also a gamma light characteristic arranges part, and it is used for from outer setting gamma light characteristic, wherein:
Display control section can change by the gamma light characteristic and part is set from the gamma light characteristic of outer setting.
In an embodiment of seventh aspect present invention, image display device also comprises a temperature detection part, and it is for detection of display board or near the temperature it, wherein:
According to the temperature that is detected by temperature detection part, display control section is provided with threshold level for referencial use, this reference is used for being provided at the gray level of the picture signal of each period of sub-frame, and is provided with the gray level that is provided at the picture signal in each period of sub-frame after being increased according to the gray level of received image signal or reducing.
In an embodiment of seventh aspect present invention, wherein received image signal has a plurality of colour components, the display control section setting is provided at the gray level of the picture signal in each period of sub-frame, in order to be displayed on the ratio between the intensity level in each period of sub-frame of the color except the color of high grade grey level with received image signal, equal to be displayed on the ratio between the intensity level in each period of sub-frame of color of the high grade grey level with received image signal.
In an embodiment of seventh aspect present invention, display control section comprises:
The timing controlled part;
Row data memory portion, it is used for receiving and keeping in the picture signal of a horizontal line;
Frame memory data selection part is partly controlled by timing controlled, in order to select the data from the data line memory portion to the frame data memory portion to transmit, perhaps input before the frame and data data that read from the frame data memory portion are exported;
The first gradation conversion part is used for the gray level of picture signal is transformed into relatively maximum level from row data memory portion, perhaps greater than the gray level of the value of defined, and the gray level that perhaps is increased or reduces according to the gray level of received image signal;
The second gradation conversion part, be used for the gray level of picture signal partly is transformed into relatively minimum level from the frame memory data selection, perhaps less than the gray level of the value of defined, the gray level that perhaps is increased or reduces according to the gray level of received image signal; And
Output data selection part is partly controlled by timing controlled, is used for selecting from the picture signal of the first gradation conversion part or from the second gradation conversion picture signal partly, and the picture signal of selecting is offered image displaying part.
In an embodiment of seventh aspect present invention, gray level greater than 90% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 10% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of seventh aspect present invention, corresponding to the gray level greater than 90% intensity level greater than the gray level of the value of defined, wherein maximum brightness level is 100% relatively, and be that wherein relatively minimum gray level is 0% corresponding to the gray level less than 10% intensity level less than the gray level of the value of defined.
In an embodiment of seventh aspect present invention, gray level greater than 98% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 2% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of seventh aspect present invention, corresponding to the gray level greater than 98% intensity level greater than the gray level of the value of defined, wherein maximum brightness level is 100% relatively, and be that wherein relatively minimum gray level is 0% corresponding to the gray level less than 2% intensity level less than the gray level of the value of defined.
In an embodiment of seventh aspect present invention, each of a plurality of pixel portion of display control section on display screen realizes showing control.
In an embodiment of seventh aspect present invention, each pixel portion comprises the pixel of a pixel or specified quantity.
In an embodiment of eighth aspect present invention, period of sub-frame has mutually the same length or is different from each other length.
In an embodiment of eighth aspect present invention, when be compared to for the response time in the image displaying part of the minimizing aspect the intensity level response time of the image displaying part of the increase aspect the intensity level in short-term, period of sub-frame α is configured to the second period of sub-frame in two period of sub-frame; And
When the response time of the image displaying part that is compared to the increase aspect intensity level for the response time in the image displaying part of the minimizing aspect the intensity level was long, period of sub-frame α was configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of eighth aspect present invention, wherein the relative maximum brightness level of image displaying part is Lmax, and the relative minimum brightness level of image displaying part is Lmin,
When be compared to for the response time from the relative maximum brightness level of Lmax to the image displaying part of the brightness transition of the relative minimum brightness level of Lmin from the relative minimum brightness level of Lmin to the image displaying part of the brightness transition of the relative maximum brightness level of Lmax response time in short-term, period of sub-frame α is configured to the second period of sub-frame in two period of sub-frame; And
When being compared to relative minimum brightness level from Lmin for the response time from the relative maximum brightness level of Lmax to the image displaying part of the brightness transition of the relative minimum brightness level of Lmin when long to the response time of the image displaying part of the brightness transition of the relative maximum brightness level of Lmax, period of sub-frame α is configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of eighth aspect present invention, the display control section setting is provided at the upper limit of the gray level of the picture signal in each period of sub-frame.
In an embodiment of eighth aspect present invention, wherein upper limit L1 is the gray level that is provided at a picture signal in the period of sub-frame, and upper limit L2 is the gray level that is provided at the picture signal in another period of sub-frame,
Display control section arranges L1 and L2, so that implementation relation L1 〉=L2.
In an embodiment of eighth aspect present invention, display control section arranges with threshold level for referencial use, this reference is for the gray level of the picture signal that is provided at each period of sub-frame, and be provided with the gray level that is provided at the picture signal in each period of sub-frame so as the gray level of received image signal and during a frame period in relation between the time integral value of brightness represent a suitable gamma light characteristic.
In an embodiment of eighth aspect present invention, image display device comprises that also a gamma light characteristic arranges part, and it is used for from outer setting gamma light characteristic, wherein:
Display control section can change by the gamma light characteristic and part is set from the gamma light characteristic of outer setting.
In an embodiment of eighth aspect present invention, image display device also comprises a temperature detection part, and it is for detection of display board or near the temperature it, wherein:
According to the temperature that is detected by temperature detection part, display control section arranges with threshold level for referencial use, this reference is used for being provided at the gray level of the picture signal of each period of sub-frame, and is provided with the gray level that is provided at the picture signal in each period of sub-frame after being increased according to the gray level of received image signal or reducing.
In an embodiment of eighth aspect present invention, wherein received image signal has a plurality of colour components, display control section being provided with is provided at the gray level of the picture signal in each period of sub-frame, in order to be displayed on the ratio between the intensity level in each period of sub-frame of the color except the color of high grade grey level with received image signal, equal to be displayed on the ratio between the intensity level in each period of sub-frame of color of the high grade grey level with received image signal.
In an embodiment of eighth aspect present invention, display control section comprises:
The timing controlled part;
Row data memory portion is for the picture signal that receives and keep in a horizontal line;
Frame memory data selection part is partly controlled by timing controlled, in order to select the data from the data line memory portion to the frame data memory portion to transmit, perhaps input before the frame and data data that read from the frame data memory portion are exported;
The first gradation conversion part is used for the gray level of picture signal is transformed into gray level greater than the value of defined from relatively maximum level, the gray level that perhaps is increased or reduces according to the gray level of received image signal;
The second gradation conversion part is used for the gray level of picture signal partly is transformed into relatively minimum level from the frame memory data selection, perhaps less than the gray level of the value of defined, and the gray level that perhaps is increased or reduces according to the gray level of received image signal; And
Output data selection part is partly controlled by timing controlled, is used for selecting from the picture signal of the first gradation conversion part or from the second gradation conversion picture signal partly, and the picture signal of selecting is offered image displaying part.
In an embodiment of eighth aspect present invention, display control section comprises:
The timing controlled part;
Row data memory portion is for the picture signal that receives and keep in a horizontal line;
The first multirow data-carrier store part and the second multirow data-carrier store part are for the picture signal of temporary a plurality of horizontal line;
Frame memory data selection part, partly controlled by timing controlled, in order to select (i) to transmit data from row data memory portion to the frame data memory portion, perhaps (ii) sends input before the frame and data that read to first multirow data-carrier store part from the frame data memory portion, and sends input before two frames and data that read to second multirow data-carrier store part from the frame data memory portion;
The intermediate image generating portion be used for to be estimated and is created in from the picture signal of the first multirow data-carrier store part with from the image of the state that mediates on the time between the picture signal of the second multirow data-carrier store part;
Temporary storage data selection part is partly controlled by timing controlled, in order to select from the picture signal of the first multirow data-carrier store part or from the second multirow data-carrier store picture signal partly; The first gradation conversion part, be used for the gray level of picture signal partly is transformed into relatively maximum level from the temporary storage data selection, perhaps greater than the gray level of the value of defined, the gray level that perhaps is increased or reduces according to the gray level of received image signal;
The second gradation conversion part is used for the gray level of picture signal is transformed into relatively minimum level from middle image producing part, perhaps less than the gray level of the value of defined, and the gray level that perhaps is increased or reduces according to the gray level of received image signal; And
Output data selection part is partly controlled by timing controlled, is used for selecting from the picture signal of the first gradation conversion part or from the second gradation conversion picture signal partly, and the picture signal of selecting is offered image displaying part.
In an embodiment of eighth aspect present invention, gray level greater than 90% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 10% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of eighth aspect present invention, corresponding to the gray level greater than 90% intensity level greater than the gray level of the value of defined, wherein relatively maximum intensity level is 100%, and be that wherein relatively minimum intensity level is 0% corresponding to the gray level less than 10% intensity level less than the gray level of the value of defined.
In an embodiment of eighth aspect present invention, gray level greater than 98% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 2% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of eighth aspect present invention, corresponding to the gray level greater than 98% intensity level greater than the gray level of the value of defined, wherein relatively maximum intensity level is 100%, and be that wherein relatively minimum intensity level is 0% corresponding to the gray level less than 2% intensity level less than the gray level of the value of defined.
In an embodiment of eighth aspect present invention, display control section is implemented in the demonstration control on each of a plurality of pixel portion on the display screen.
In an embodiment of this invention, each pixel comprises the pixel of a pixel or specified quantity.
In an embodiment of ninth aspect present invention, period of sub-frame has mutually the same length or is different from each other length.
In an embodiment of ninth aspect present invention, be compared to when the response time for the image displaying part of the minimizing of brightness aspect the brightness aspect increase image displaying part response time in short-term, period of sub-frame α is configured to the second period of sub-frame in two period of sub-frame; And
Be compared to response time of image displaying part of increase of brightness aspect when long when the response time for the image displaying part of the minimizing of brightness aspect, period of sub-frame α is configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of ninth aspect present invention, wherein the relatively maximum intensity level of image displaying part is Lmax, and the relatively minimum intensity level of image displaying part is Lmin,
When be compared to for the response time from the relative maximum brightness level of Lmax to the image displaying part of the brightness transition of the relative minimum brightness level of Lmin from the relative minimum brightness level of Lmin to the image displaying part of the brightness transition of the relative maximum brightness level of Lmax response time in short-term, period of sub-frame α is configured to the second period of sub-frame in two period of sub-frame; And
When being compared to relative minimum brightness level from Lmin for the response time from the relative maximum brightness level of Lmax to the image displaying part of the brightness transition of the relative minimum brightness level of Lmin when long to the response time of the image displaying part of the brightness transition of the relative maximum brightness level of Lmax, period of sub-frame α is configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of ninth aspect present invention, the display control section setting is provided at the upper limit of the gray level of the picture signal in each period of sub-frame.
In an embodiment of ninth aspect present invention, upper limit L1 is the gray level that is provided at a picture signal in the period of sub-frame, and upper limit L2 is the gray level that is provided at the picture signal in another period of sub-frame,
Display control section arranges L1 and L2, so that implementation relation L1 〉=L2.
In an embodiment of ninth aspect present invention, display control section arranges with threshold level for referencial use, this reference is for the gray level of the picture signal that is provided at each period of sub-frame, and be provided with the gray level that is provided at the picture signal in each period of sub-frame so as the gray level of received image signal and during a frame period in the time integral value of brightness between relation represent a suitable gamma light characteristic.
In an embodiment of this invention, image display device comprises that also a gamma light characteristic arranges part, and it is used for from outer setting gamma light characteristic, wherein:
Display control section can change by the gamma light characteristic and part is set from the gamma light characteristic of outer setting.
In an embodiment of ninth aspect present invention, image displaying part also comprises a temperature detection part, and it is for detection of display board or near the temperature it, wherein:
According to the temperature that is detected by temperature detection part, display control section arranges with threshold level for referencial use, this reference is used for being provided at the gray level of the picture signal of each period of sub-frame, and is provided with the gray level that is provided at the picture signal in each period of sub-frame after being increased according to the gray level of received image signal or reducing.
In an embodiment of ninth aspect present invention, wherein received image signal has a plurality of colour components, the display control section setting is provided at the gray level of the picture signal in each period of sub-frame, in order to be displayed on the ratio between the intensity level in each period of sub-frame of the color except the color of high grade grey level with received image signal, equal to be displayed on the ratio between the intensity level in each period of sub-frame of color of the high grade grey level with received image signal.
In an embodiment of ninth aspect present invention, display control section comprises:
The timing controlled part;
Row data memory portion is for the picture signal that receives and keep in a horizontal line;
Frame memory data selection part is partly controlled by timing controlled, in order to select the data from the data line memory portion to the frame data memory portion to transmit, perhaps input before the frame and data data that read from the frame data memory portion are exported;
The first gradation conversion part is used for the gray level of picture signal is transformed into relatively maximum level from row data memory portion, perhaps greater than the gray level of the value of defined, and the gray level that perhaps is increased or reduces according to the gray level of received image signal;
The second gradation conversion part is used for the gray level of picture signal partly is transformed into relatively minimum level from the frame memory data selection, perhaps less than the gray level of the value of defined, and the gray level that perhaps is increased or reduces according to the gray level of received image signal; And
Output data selection part is partly controlled by timing controlled, is used for selecting from the picture signal of the first gradation conversion part or from the second gradation conversion picture signal partly, and the picture signal of selecting is offered image displaying part.
In an embodiment of ninth aspect present invention, display control section comprises:
The timing controlled part;
Row data memory portion is for the picture signal that receives and keep in a horizontal line;
The first multirow data-carrier store part and the second multirow data-carrier store part are for the picture signal of temporary a plurality of horizontal line;
Frame memory data selection part, partly controlled by timing controlled, in order to select (i) that data are sent to the frame data memory portion from row data memory portion, perhaps (ii) with input before the frame and be sent to the first multirow data-carrier store part from the data that the frame data memory portion is read, and input before two frames and data that read are sent to the second multirow data-carrier store part from the frame data memory portion;
The gray level part of averaging, be used for to calculate from the gray level of the picture signal of the first multirow data-carrier store part with from the mean value of the gray level of the picture signal of the second multirow data-carrier store part, and this mean value is offered the second gradation conversion part;
Temporary storage data selection part is partly controlled by timing controlled, in order to select from the picture signal of the first multirow data-carrier store part or from the second multirow data-carrier store picture signal partly;
The first gradation conversion part, be used for the gray level of picture signal partly is transformed into relatively maximum level from the temporary storage data selection, perhaps greater than the gray level of the value of defined, the gray level that perhaps is increased or reduces according to the gray level of received image signal;
The second gradation conversion part is used for the gray level of picture signal is transformed into relatively minimum level from the gray level part of averaging, perhaps less than the gray level of the value of defined, and the gray level that perhaps is increased or reduces according to the gray level of received image signal; And
Output data selection part is partly controlled by timing controlled, is used for selecting from the picture signal of the first gradation conversion part or from the second gradation conversion picture signal partly, and the picture signal of selecting is offered image displaying part.
In an embodiment of ninth aspect present invention, gray level greater than 90% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 10% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of ninth aspect present invention, corresponding to the gray level greater than 90% intensity level greater than the gray level of the value of defined, wherein relatively maximum intensity level is 90%, and be that wherein relatively minimum intensity level is 0% corresponding to the gray level less than 10% intensity level less than the gray level of defined.
In an embodiment of ninth aspect present invention, gray level greater than 98% greater than the gray level of the value of defined, wherein relatively maximum gray level is 100%, and is gray level less than 2% less than the gray level of the value of defined, and wherein relatively minimum gray level is 0%.
In an embodiment of ninth aspect present invention, corresponding to the gray level greater than 98% intensity level greater than the gray level of the value of defined, wherein relatively maximum intensity level is 90%, and be that wherein relatively minimum intensity level is 0% corresponding to the gray level less than 2% intensity level less than the gray level of defined.
In an embodiment of ninth aspect present invention, display control section is implemented in the demonstration control on each of a plurality of pixel portion on the display screen.
In an embodiment of this invention, each pixel portion comprises the pixel of a pixel or specified quantity.
Among the embodiment according to tenth aspect present invention, provide a kind of electronic installation, it is used for realization and shows according to the image on the display screen of the image displaying part of the image display device of first aspect present invention.
In the present invention the tenth embodiment on the one hand, a kind of liquid crystal TV is provided, comprising:
Image display device according to first aspect present invention; And
Tuner pack is for the display control section of the TV broadcast singal of selected channel being exported to image display device.
Among the embodiment according to the present invention the 12 aspect, provide a kind of liquid crystal monitoring apparatus medium, having comprised:
Image display device according to first aspect present invention; And
Signal processing is used for exporting to by the monitor image signal of processing the external monitor signal acquisition display control section of image display device.
According to a thirteenth aspect of the present invention, a kind of method for displaying image is provided, be used for by asking the brightness in the image displaying part that is displayed on period of sub-frame time integral value and, realize that the image of a frame shows, wherein n be one more than or equal to 2 integer.The method comprises the steps:
Be used for frame period that image shows be positioned at the time state center or near the relatively period of sub-frame of central authorities at this time state center, this step is provided at the picture signal of a relative maximum gray scale in the scope to image displaying part, the time integral value of the brightness in this scope in n period of sub-frame and be no more than intensity level corresponding to the gray level of a received image signal;
When the time integral value of the brightness in the period of sub-frame in relative central authorities and when not reaching intensity level corresponding to the gray level of received image signal, in each of period of sub-frame afterwards after the period of sub-frame of the front before the period of sub-frame of relative central authorities and the period of sub-frame in relative central authorities, this step is provided at the picture signal of a relative maximum gray scale in the scope to image displaying part, the time integral value of the brightness in this scope in n period of sub-frame and be no more than intensity level corresponding to received image signal;
When relatively central authorities period of sub-frame in brightness time integral value and, when the period of sub-frame of front and period of sub-frame afterwards still do not reach corresponding to the gray level of received image signal, in period of sub-frame before the period of sub-frame of the face of front and each of a period of sub-frame after period of sub-frame afterwards, this step is provided at the picture signal of a relative maximum gray scale in the scope to image displaying part, the time integral value of the brightness in this scope in n period of sub-frame and be no more than intensity level corresponding to the gray level of received image signal;
This step repeats this operation, until the time integral value of the brightness in all period of sub-frame of the picture signal that provides and reach intensity level corresponding to the gray level of received image signal; And
When this with when reaching intensity level corresponding to the gray level of received image signal, this step to image displaying part the picture signal of relative minimal gray level is provided or in the residue period of sub-frame less than the picture signal of the gray level of the value of defined.
According to a fourteenth aspect of the present invention, a kind of method for displaying image is provided, be used for by asking the brightness that is displayed on image displaying part n period of sub-frame time integral value and, realize the image demonstration of a frame, wherein n is equal to or greater than 3 odd number, wherein:
Since upper nearest period of sub-frame of time or since the time the latest period of sub-frame, this period of sub-frame be known as the first period of sub-frame, the second period of sub-frame ..., the n period of sub-frame; And the period of sub-frame that is positioned at the time state center in a frame period that shows for image is known as the m period of sub-frame, wherein m=(n+1)/2; And
Provide (n+1)/2 a threshold level of the gray level that is used for received image signal, and from the threshold level of minimum, these threshold levels be known as T1, T2 ..., T[(n+1)/2];
The method comprises the steps:
When the gray level of received image signal is equal to or less than T1, this step provides the picture signal of the gray level that is increased according to the gray level of the received image signal in the m period of sub-frame or reduces to image displaying part, and in other period of sub-frame the relative picture signal of minimum gray level or less than the picture signal of the value of defined;
When the gray level of received image signal greater than T1 and when being equal to or less than T2, this step is provided in the m period of sub-frame picture signal of relatively maximum gray level or greater than the picture signal of the gray level of the value of defined to image displaying part, the picture signal of the gray level that in each of (m-1) period of sub-frame and (m+1) period of sub-frame, is increased according to the gray level of received image signal or reduces, and in other period of sub-frame the relative picture signal of minimum gray level or less than the picture signal of the gray level of the value of defined;
When the gray level of received image signal greater than T2 and when being equal to or less than T3, this step is provided at the m period of sub-frame to image displaying part, the picture signal of relative maximum gray scale or greater than the picture signal of the gray level of the value of defined in each of (m-1) period of sub-frame and (m+1) period of sub-frame, the picture signal of the gray level that in each of (m-2) period of sub-frame and (m+2) period of sub-frame, is increased according to the gray level of received image signal or reduces, and in other period of sub-frame the relative picture signal of minimum gray level or less than the picture signal of the gray level of the value of defined; And by this way,
When the gray level of received image signal greater than Tx-1 and when being equal to or less than Tx, wherein x is equal to or greater than 4 integer, this step is provided in each of [m-(x-2)] period of sub-frame to the [m+ (x-2)] period of sub-frame the relative picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to image displaying part, the picture signal of the gray level that in each of [m-(x-1)] period of sub-frame to the [m+ (x-1)] period of sub-frame, is increased according to the gray level of received image signal or reduces, and in other period of sub-frame the relative picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined.
According to a fifteenth aspect of the present invention, a kind of method for displaying image is provided, be used for n period of sub-frame by ask the time integral value that is displayed on the brightness in the image displaying part and, realize the image demonstration of a frame, wherein n is equal to or greater than 2 integer, wherein:
Since upper nearest period of sub-frame of time or since the time the latest period of sub-frame, this period of sub-frame be known as the first period of sub-frame, the second period of sub-frame ..., the n period of sub-frame; And two period of sub-frame that are used for a frame period time of closest approach state center of image demonstration are known as m1 period of sub-frame and m2 period of sub-frame, wherein m1=n/2 and m2=n/2+1; And
Provide n/2 threshold level of the gray level that is used for received image signal, and from the threshold level of minimum, this threshold level be known as T1, T2 ..., T[n/2];
The method comprises the steps:
When the gray level of received image signal is equal to or less than T1, this step provides the picture signal of the gray level that is increased according to the gray level of the received image signal in each of m1 period of sub-frame and m2 period of sub-frame or reduces to image displaying part, and in other period of sub-frame the relative picture signal of minimum gray level or less than the picture signal of the value of defined;
When the gray level of received image signal greater than T1 and when being equal to or less than T2, this step is provided at the picture signal of relative maximum gray level in each of m1 period of sub-frame and m2 period of sub-frame or greater than the picture signal of the gray level of the value of defined to image displaying part, the picture signal of the gray level that in each of (m1-1) period of sub-frame and (m2+1) period of sub-frame, is increased according to the gray level of received image signal or reduces, and in other period of sub-frame the relative picture signal of minimum gray level or less than the picture signal of the gray level of the value of defined;
When the gray level of received image signal greater than T2 and when being equal to or less than T3, this step is provided at the m1 period of sub-frame to image displaying part, the m2 period of sub-frame, the picture signal of relative maximum gray scale or greater than the picture signal of the gray level of the value of defined in each of (m1-1) period of sub-frame and (m2+1) period of sub-frame, the picture signal of the gray level that in each of (m1-2) period of sub-frame and (m2+2) period of sub-frame, is increased according to the gray level of received image signal or reduces, and in other period of sub-frame the relative picture signal of minimum gray level or less than the picture signal of the gray level of the value of defined; And by this way,
When the gray level of received image signal greater than Tx-1 and when being equal to or less than Tx, wherein x is equal to or greater than 4 integer, this step is provided in each of [m1-(x-2)] period of sub-frame to the [m2+ (x-2)] period of sub-frame the relative picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to image displaying part, the picture signal of the gray level that in each of [m1-(x-1)] period of sub-frame to the [m2+ (x-1)] period of sub-frame, is increased according to the gray level of received image signal or reduces, and in other period of sub-frame the relative picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined.
According to a sixteenth aspect of the present invention, a kind of method for displaying image is provided, be used for by asking the brightness that is displayed on image displaying part two period of sub-frame time integral value and, realize that the image of a frame shows,
One of them period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β;
The method comprises the steps:
When the gray level of received image signal is equal to or less than by well-determined threshold level, this step is provided among the period of sub-frame α to image displaying part that gray level according to received image signal is increased or the picture signal of the gray level that reduces, and in period of sub-frame β the relative picture signal of minimum gray level or less than the picture signal of the gray level of the value of defined; And
When the gray level of received image signal during greater than this threshold level, this step is provided among the period of sub-frame α picture signal of relatively maximum gray level or greater than the picture signal of the gray level of the value of defined to image displaying part, and is increased according to the gray level of received image signal in period of sub-frame β or the picture signal of the gray level that reduces.
According to a seventeenth aspect of the present invention, a kind of method for displaying image is provided, be used for the time integral value of two period of sub-frame by asking the brightness that is displayed on image displaying part and, realize that the image of a frame shows,
One of them period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β; And the threshold level T1 and the T2 that have stipulated the gray level in two period of sub-frame, and threshold level T2 is greater than threshold level T1;
The method comprises the steps:
When the gray level of received image signal is equal to or less than threshold level T1, this step is provided among the period of sub-frame α to image displaying part that gray level according to received image signal is increased or the picture signal of the gray level that reduces, and in period of sub-frame β the relative picture signal of minimum gray level or less than the picture signal of the gray level of the value of defined;
When the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, this step is provided among the period of sub-frame α picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part, and less than being provided at the gray level among the period of sub-frame α and in period of sub-frame β, being increased according to the gray level of received image signal or the picture signal of the gray level that reduces; And
When the gray level of received image signal during greater than threshold level T2, this step is provided among the period of sub-frame α picture signal greater than the gray level of the value of defined to image displaying part, and piles up according to the meeting of received image signal in period of sub-frame β and be increased or the picture signal of the gray level that reduces.
According to a eighteenth aspect of the present invention, a kind of method for displaying image is provided, be used for the time integral value of two period of sub-frame by asking the brightness that is displayed on image displaying part and, realize that the image of a frame shows,
One of them period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β; Stipulated threshold level T1 and the T2 of the gray level in two period of sub-frame, and threshold level T2 is greater than threshold level T1; And gray level L is determined by unique;
The method comprises the steps:
When the gray level of received image signal is equal to or less than threshold level T1, this step is provided among the period of sub-frame α picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part, and in period of sub-frame β the relative picture signal of minimum gray level or less than the picture signal of the gray level of the value of defined;
When the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, this step is provided at the picture signal of gray level L among the period of sub-frame α to image displaying part, and is increased according to the gray level of received image signal in period of sub-frame β or the picture signal of the gray level that reduces; And
When the gray level of received image signal during greater than threshold level T2, this step is provided among the period of sub-frame α picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part, and in period of sub-frame β the relative picture signal of maximum gray level or greater than the picture signal of the gray level of the value of defined.
According to a nineteenth aspect of the present invention, a kind of method for displaying image is provided, be used for by ask two period of sub-frame the time integral value that is displayed on the brightness in the image displaying part and, realize that the image of a frame shows,
One of them period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β;
The method comprises the steps:
By the estimation based on two frames of the image of continuous input, produce the image of the state that mediates in time;
In period of sub-frame α, when the gray level of received image signal was equal to or less than by a well-determined threshold level, this step provided the picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part; And when the gray level of received image signal during greater than this threshold level, this step provides the picture signal of relatively maximum gray level or greater than the picture signal of the gray level of the value of defined to image displaying part; And
In period of sub-frame β, when the gray level of the picture signal of the state of mediating was equal to or less than this threshold level, this step provided the picture signal of relatively minimum gray level or less than the picture signal of the gray level of the value of defined to image displaying part; And when the gray level of the picture signal of the state of mediating during greater than this threshold level, this step provides according to the gray level of the picture signal of the state of mediating to image displaying part and is increased or the picture signal of the gray level that reduces.
According to a twentieth aspect of the present invention, a kind of method for displaying image is provided, be used for the time integral value of two period of sub-frame by asking the brightness that is displayed on image displaying part and, realize that the image of a frame shows,
One of them period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β;
The method comprises the steps:
In period of sub-frame α, when the gray level of received image signal was equal to or less than by a well-determined threshold level, this step provided the picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part; And when the gray level of received image signal during greater than this threshold level, this step provides the picture signal of relatively maximum gray level or greater than the picture signal of the gray level of the value of defined to image displaying part; And
In period of sub-frame β, when the mean value of gray level of the gray level of the picture signal in current frame period and the picture signal of input before a frame or a frame after was equal to or less than this threshold level, this step provided the picture signal of the relative gray level of minimum or less than the picture signal of the gray level of the value of defined to image displaying part; And when this mean value during greater than this threshold level, this step provides the picture signal of the gray level that is increased according to this mean value or reduces to image displaying part.
According to the 20 one side of the present invention, a kind of computer program is provided, be used for allowing the computing machine execution according to the method for displaying image of the present invention's the tenth three aspects:.
According to the 22 aspect of the present invention, a kind of computer readable recording medium storing program for performing is provided, it has the computer program according to the present invention's the 20 one side that is stored in above it.
According to the 20 three aspects: of the present invention, a kind of method of image of the received image signal that is provided for showing, this received image signal comprises at least one Moving Objects part and a background parts, wherein a frame period is divided into a plurality of period of sub-frame that comprise at least one α period of sub-frame and a β period of sub-frame, and the method comprises:
The gray level of received image signal is provided to image displaying part, wherein when Moving Objects part and background parts all are in the intensity level below 50% of relative high-high brightness, the intensity level of a relative minimum is provided at least β of a plurality of period of sub-frame period of sub-frame so, and wherein, when Moving Objects part and background parts all are at least 50% intensity level of relative high-high brightness, at least α of a plurality of period of sub-frame period of sub-frame, provide so the intensity level of a relative maximum.
In the first embodiment of the present invention's the 20 three aspects:, these a plurality of period of sub-frame are two period of sub-frame.
According to the 24 aspect of the present invention, a kind of display packing is provided, comprise the method for the 20 three aspects:, also comprise:
Show the received image signal that the gray level that provides is provided.
According to the 25 aspect of the present invention, a kind of display packing is provided, comprise according to the method for the first embodiment of the 20 three aspects: of the present invention, also comprise:
Show the received image signal that the gray level that provides is provided.
Among the embodiment aspect the present invention the 25, when be compared to for the response time in the image displaying part of the minimizing aspect the intensity level response time of the image displaying part of the increase aspect the intensity level relatively in short-term, the α period of sub-frame is configured to the second period of sub-frame in two period of sub-frame; And
When the response time of the image displaying part that is compared to the increase aspect intensity level for the response time in the image displaying part of the minimizing aspect the intensity level was long, the α period of sub-frame was configured to the first period of sub-frame in two period of sub-frame.
According to the 26 aspect of the present invention, a kind of equipment of the method for realizing the present invention the 25 aspect, wherein be compared in the response time of the image displaying part of the increase aspect the intensity level relatively shortly for the response time in the image displaying part of the minimizing aspect the intensity level, and the α period of sub-frame is configured to the second period of sub-frame in two period of sub-frame.
According to the 27 aspect of the present invention, a kind of equipment of the method for realizing the present invention the 25 aspect, wherein be compared in the response time of the image displaying part of the increase aspect the intensity level longly for the response time in the image displaying part of the minimizing aspect the intensity level, and the α period of sub-frame is configured to the first period of sub-frame in two period of sub-frame.
According to the 20 eight aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the present invention's the 20 three aspects:.
According to the 29 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the first embodiment of the present invention's the 20 three aspects:.
According to the 30 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the present invention the 24 aspect.
According to the 30 one side of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 25 aspect of the present invention.
According to the 32 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the embodiment of the 22 aspect of the present invention.
According to the 30 three aspects: of the present invention, a kind of computer readable recording medium storing program for performing has the computer program according to the present invention's the 20 eight aspect.
According to the 34 aspect of the present invention, a kind of computer readable recording medium storing program for performing has the computer program according to the present invention the 29 aspect.
According to the 35 aspect of the present invention, a kind of computer readable recording medium storing program for performing has the computer program according to the present invention the 30 aspect.
According to the 36 aspect of the present invention, a kind of computer readable recording medium storing program for performing has the computer program according to the present invention's the 30 three aspects:.
According to the 37 aspect of the present invention, a kind of computer readable recording medium storing program for performing has the computer program according to the present invention the 32 aspect.
According to the 30 eight aspect of the present invention, a kind of method is provided, and the image of the received image signal that the method is provided for showing, this received image signal comprise at least one Moving Objects part and a background parts, wherein a frame period is divided into a plurality of period of sub-frame, and the method comprises:
The gray level of received image signal is provided to image displaying part, wherein the intensity level of Moving Objects is relatively when being provided at the intensity level of the intensity level in the second period of sub-frame in being provided at the first period of sub-frame, the intensity level that is provided at so the background in the first period of sub-frame also is relatively less than the intensity level that is provided at the intensity level in the second period of sub-frame, and wherein the intensity level of Moving Objects is relatively when being provided at the intensity level of the intensity level in the second period of sub-frame in being provided at the first period of sub-frame, and the intensity level that is provided at so the background in the first period of sub-frame also is relatively greater than the intensity level that is provided at the intensity level in the second period of sub-frame.
In an embodiment of the present invention's the 30 eight aspect, these a plurality of period of sub-frame are two period of sub-frame.
According to the 39 aspect of the present invention, a kind of display packing comprises also comprising the method for the 30 eight aspect of the present invention:
Show the received image signal that the gray level that provides is provided.
According to the 40 aspect of the present invention, a kind of display packing comprises also comprising the method for this embodiment of the 30 eight aspect of the present invention:
Show the received image signal that the gray level that provides is provided.
According to the 40 one side of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 30 eight aspect of the present invention.
According to the 42 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for this embodiment of the 30 eight aspect of the present invention.
According to the 40 three aspects: of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 39 aspect of the present invention.
According to the 44 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the present invention the 40 aspect.
According to the 45 aspect of the present invention, a kind of computer program is used for allowing computing machine to carry out the method on the one hand according to the present invention the 40.
According to the 46 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 42 aspect of the present invention.
According to the 47 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 40 three aspects: of the present invention.
According to the 40 eight aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 44 aspect of the present invention.
According to the 49 aspect of the present invention, a kind of device is provided, be used for showing the image of received image signal, this received image signal comprises at least one Moving Objects part and a background parts, wherein a frame period is divided into and comprises at least a plurality of period of sub-frame of α period of sub-frame and β period of sub-frame, and this device comprises:
Device for the gray level that received image signal is provided; And
Be used for showing the device of the picture signal that the gray scale that provides is provided, wherein when Moving Objects part and background parts all are intensity level below 50% in relative high-high brightness, the intensity level of relative minimum is provided at least β of a plurality of period of sub-frame period of sub-frame so, and wherein, when Moving Objects part and background parts all are at least 50% intensity level of relative high-high brightness, at least α of a plurality of period of sub-frame period of sub-frame, provide so the intensity level of relative maximum.
Among the embodiment aspect the of the present invention the 49, these a plurality of period of sub-frame are two period of sub-frame.
In an embodiment of this invention, when for response time of the display device of the minimizing aspect the intensity level than response time of the display device of the increase aspect the intensity level relatively in short-term, this α period of sub-frame is configured to the second period of sub-frame in two period of sub-frame; And
When longer than the response time of the display device of the increase aspect intensity level in the response time of the display device of the minimizing aspect the intensity level, this α period of sub-frame is configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of this invention, when for response time of the display device of the minimizing aspect the intensity level than response time of the display device of the increase aspect the intensity level relatively in short-term, this α period of sub-frame is configured to the second period of sub-frame in two period of sub-frame.
In an embodiment of this invention, when when longer than the response time of the display device of the increase aspect intensity level in the response time of the display device of the minimizing aspect the intensity level, this α period of sub-frame is configured to the first period of sub-frame in two period of sub-frame.
According to the 50 aspect of the present invention, a kind of device is provided, it is used for showing the image of received image signal, and this received image signal comprises at least Moving Objects part and background parts, and wherein a frame period is divided into a plurality of period of sub-frame, and this device comprises:
Device for the gray level that received image signal is provided; And
Be used for showing the received image signal that the gray scale that provides is provided, wherein the intensity level of Moving Objects is relatively when being provided at the intensity level of the intensity level in the second period of sub-frame in being provided at the first period of sub-frame, the intensity level that is provided at so the background in the first period of sub-frame also is relatively less than the intensity level that is provided at the intensity level in the second period of sub-frame, and wherein the intensity level of Moving Objects is relatively when being provided at the intensity level of the intensity level in the second period of sub-frame in being provided at the first period of sub-frame, and the intensity level that is provided at so the background in the first period of sub-frame also is relatively greater than the intensity level that is provided at the intensity level in the second period of sub-frame.
In an embodiment of this invention, these a plurality of period of sub-frame are two period of sub-frame.
According to the of the present invention the 50 on the one hand, a kind of device of the image for showing received image signal, this received image signal comprises at least Moving Objects part and background parts, wherein a frame period is divided into and comprises at least a plurality of period of sub-frame of α period of sub-frame and β period of sub-frame, and this device comprises:
Display control section is suitable for providing the gray level of received image signal; And
Image displaying part, be suitable for showing the picture signal that the gray scale that provides is provided, wherein when Moving Objects part and background parts all are intensity level below 50% in relative high-high brightness, the intensity level of relative minimum is provided at least β of a plurality of period of sub-frame period of sub-frame so, and wherein, when Moving Objects part and background parts all are at least 50% intensity level of relative high-high brightness, at least α of a plurality of period of sub-frame period of sub-frame, provide so the intensity level of relative maximum.
In an embodiment of this invention, these a plurality of period of sub-frame are two period of sub-frame.
In an embodiment of this invention, when be compared to for the response time in the image displaying part of the minimizing aspect the intensity level response time of the image displaying part of the increase aspect the intensity level relatively in short-term, this α period of sub-frame is configured to the second period of sub-frame in two period of sub-frame; And
When the response time of the image displaying part that is compared to the increase aspect intensity level for the response time in the image displaying part of the minimizing aspect the intensity level was long, this α period of sub-frame was configured to the first period of sub-frame in two period of sub-frame.
In an embodiment of this invention, be compared in the response time of the image displaying part of the increase aspect the intensity level relatively shortly for the response time in the image displaying part of the minimizing aspect the intensity level, and this α period of sub-frame is configured to the second period of sub-frame in two period of sub-frame.
In an embodiment of this invention, be compared in the response time of the image displaying part of the increase aspect the intensity level longly for the response time in the image displaying part of the minimizing aspect the intensity level, and this α period of sub-frame is configured to the first period of sub-frame in two period of sub-frame.
According to the 52 aspect of the present invention, a kind of device of the image for showing received image signal is provided, this received image signal comprises at least Moving Objects part and background parts, and wherein a frame period is divided into a plurality of period of sub-frame, and this device comprises:
Display control section is suitable for providing the gray level of received image signal; And
Image displaying part, be suitable for showing the received image signal that the gray scale that provides is provided, wherein the intensity level of the Moving Objects in being provided at the first period of sub-frame is when being provided at the relatively little intensity level of intensity level in the second period of sub-frame, the intensity level that is provided at so the background in the first period of sub-frame also is than the relatively little intensity level of intensity level that is provided in the second period of sub-frame, and wherein the intensity level of Moving Objects is relatively when being provided at the intensity level of the intensity level in the second period of sub-frame in being provided at the first period of sub-frame, and the intensity level that is provided at so the background in the first period of sub-frame also is than the relatively large intensity level of intensity level that is provided in the second period of sub-frame.
In an embodiment of this invention, these a plurality of period of sub-frame are two period of sub-frame.
According to the 50 three aspects: of the present invention, a kind of method that is provided for showing the image of received image signal, wherein a frame period is divided into a plurality of period of sub-frame, and the method comprises:
The gray level of received image signal is provided to image displaying part, wherein with at the relatively minimum brightness value that in the period of sub-frame relatively farthest of the relative central authorities of a plurality of period of sub-frame, provides together, at least one of the relatively central authorities of a plurality of period of sub-frame, provide relatively maximum brightness value.
In the first embodiment of this invention, when this gray level be relative high-high brightness at least 50% the time, so at least one relatively subframe of central authorities the intensity level of relative maximum brightness level is provided.
In the second embodiment of this invention, when this gray level less than relative maximum brightness level 50% the time, so in the intensity level that relative minimum is provided in the period of sub-frame relatively farthest of the relatively central authorities of a plurality of period of sub-frame.
In the 3rd embodiment of this invention, when this gray level less than relative maximum brightness level 50% the time, so in the intensity level that relative minimum is provided in the period of sub-frame relatively farthest of the relatively central authorities of a plurality of period of sub-frame.
In the 4th embodiment of this invention, when these a plurality of period of sub-frame quantitatively are odd number, relatively maximum brightness value is provided at least one central subframe, and when these a plurality of period of sub-frame quantitatively are even number, at least two relatively central subframes, provide relatively maximum brightness value.
According to the 54 aspect of the present invention, a kind of display packing comprises also comprising the method for the 50 three aspects: of the present invention:
Show the received image signal that the gray level that provides is provided.
According to the 55 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 50 three aspects: of the present invention.
According to the 56 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the first embodiment of the 50 three aspects: of the present invention.
According to the 57 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the second embodiment of the 50 three aspects: of the present invention.
According to the 50 eight aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 3rd embodiment of the 50 three aspects: of the present invention.
According to the 59 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 4th embodiment of the 50 three aspects: of the present invention.
According to the 60 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 54 aspect of the present invention.
According to the 60 one side of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 55 aspect of the present invention.
According to the 62 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 56 aspect of the present invention.
According to the 60 three aspects: of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 57 aspect of the present invention.
According to the 64 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 50 eight aspect of the present invention.
According to the 65 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 59 aspect of the present invention.
According to the 66 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 60 aspect of the present invention.
According to the 67 aspect of the present invention, a kind of method that is provided for showing the image of received image signal, wherein a frame period is divided into a plurality of period of sub-frame, and the method comprises:
Provide the gray level of received image signal to image displaying part, wherein with respect to for the beginning subframe relatively outward of the relatively central authorities of a plurality of period of sub-frame, relative reduce the brightness value of this gray level.
In the first embodiment of this invention, when this gray level be relative high-high brightness at least 50% the time, so to a plurality of period of sub-frame relatively central authorities at least one the gray level of relative maximum brightness value is provided.
In the second embodiment of this invention, when this gray level less than relative maximum brightness level 50% the time, so in the intensity level that relative minimum is provided in the period of sub-frame relatively farthest of the relatively central authorities of a plurality of period of sub-frame.
In the 3rd embodiment of this invention, when this gray level less than relative maximum brightness level 50% the time, so in the intensity level that relative minimum is provided in the period of sub-frame relatively farthest of the relatively central authorities of a plurality of period of sub-frame.
In the 4th embodiment of this invention, when these a plurality of period of sub-frame quantitatively are odd number, relatively maximum brightness value is provided at least one central subframe, and when these a plurality of period of sub-frame quantitatively are even number, in the subframe of two central authorities, provide relatively maximum brightness value at least.
According to the 60 eight aspect of the present invention, a kind of display packing comprises also comprising the method for the 67 aspect of the present invention:
Show the received image signal that the gray level that provides is provided.
According to the 69 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 67 aspect of the present invention.
According to the 70 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the first embodiment of the 67 aspect of the present invention.
According to the 70 one side of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the second embodiment of the 67 aspect of the present invention.
According to the 72 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 3rd embodiment of the 67 aspect of the present invention.
According to the 70 three aspects: of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 4th embodiment of the 67 aspect of the present invention.
According to the 74 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 60 eight aspect of the present invention.
According to the 75 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 69 aspect of the present invention.
According to the 76 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 70 aspect of the present invention.
According to the 77 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 70 one side of the present invention.
According to the 70 eight aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 72 aspect of the present invention.
According to the 79 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 70 three aspects: of the present invention.
According to the 80 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for the 74 aspect of the present invention.
According to the 80 one side of the present invention, a kind of device of the image for showing received image signal is provided, wherein a frame period is divided into a plurality of period of sub-frame, and this device comprises:
Device for the gray level that received image signal is provided; And
Be used for showing the device of the received image signal that the gray level that provides is provided, wherein with at the relatively minimum brightness value that in the period of sub-frame relatively farthest of the relative central authorities of a plurality of period of sub-frame, provides together, at least one of the relatively central authorities of a plurality of period of sub-frame, provide relatively maximum brightness value.
In the first embodiment of this invention, when this gray level be relative high-high brightness at least 50% the time, so at least one relatively subframe of central authorities the intensity level of relative maximum brightness level is provided.
In the second embodiment of this invention, when this gray level less than relative maximum brightness level 50% the time, so in the intensity level that relative minimum is provided in the period of sub-frame relatively farthest of the relatively central authorities of a plurality of period of sub-frame.
In the second embodiment of this invention, when this gray level less than relative maximum brightness level 50% the time, so in the intensity level that relative minimum is provided in the period of sub-frame relatively farthest of the relatively central authorities of a plurality of period of sub-frame.
In the 3rd embodiment of this invention, when these a plurality of period of sub-frame quantitatively are odd number, relatively maximum brightness value is provided at least one central subframe, and when these a plurality of period of sub-frame quantitatively are even number, at least two relatively central subframes, provide relatively maximum brightness value.
According to the 82 aspect of the present invention, a kind of device of the image for showing received image signal is provided, wherein a frame period is divided into a plurality of period of sub-frame, and this device also comprises:
Display control section is suitable for providing the gray level of received image signal; And
Image displaying part, be suitable for showing the received image signal that the gray level that provides is provided, wherein with from the relatively minimum brightness value that from the relative central authorities beginning subframe relatively farthest of a plurality of subframes, provides together, at least one of the relatively central authorities of a plurality of subframes, provide relatively maximum brightness value.
In the first embodiment of this invention, when this gray level be relative high-high brightness at least 50% the time, provide the intensity level of relative maximum brightness value at least relative subframe of central authorities so.
In the second embodiment of this invention, when this gray level less than relative maximum brightness value 50% the time, so from the intensity level that relative minimum is provided in subframe week relatively farthest from the relatively central authorities beginning of a plurality of subframes.
In the 3rd embodiment of this invention, when this gray level less than relative maximum brightness value 50% the time, so from the intensity level that relative minimum is provided in subframe week relatively farthest from the relatively central authorities beginning of a plurality of subframes.
In the 4th embodiment of this invention, when these a plurality of subframes quantitatively are odd number, relatively maximum brightness value is provided at least one central subframe, and when these a plurality of subframes quantitatively are even number, at least two relatively central subframes, provides relatively maximum brightness value.
According to the 80 three aspects: of the present invention, a kind of device of the image for showing received image signal is provided, wherein a frame period is divided into a plurality of subframes, and this device comprises:
Be used for providing the gray level of received image signal; And
Be used for to show the received image signal that the gray level that provides is provided, wherein for the relatively relatively outside subframe of central authorities from a plurality of subframes, relative reduce the brightness value of this gray level.
In the first embodiment of this invention, when this gray level be relative high-high brightness at least 50% the time, so to a plurality of subframes at least one relatively central authorities intensity level of relative maximum brightness value is provided.
In the second embodiment of this invention, when this gray level less than relative maximum brightness level 50% the time, when this gray level less than relative maximum brightness value 50% the time, so from the intensity level that relative minimum is provided in subframe week relatively farthest from the relatively central authorities beginning of a plurality of subframes.
In the 3rd embodiment of this invention, when this gray level less than relative maximum brightness value 50% the time, so from the intensity level that relative minimum is provided in subframe week relatively farthest from the relatively central authorities beginning of a plurality of subframes.
In the 4th embodiment of this invention, when these a plurality of subframes quantitatively are odd number, relatively maximum brightness value is provided at least one central subframe, and when these a plurality of subframes quantitatively are even number, at least two relatively central subframes, provides relatively maximum brightness value.
According to the 84 aspect of the present invention, a kind of device of the image for showing received image signal is provided, wherein a frame period is divided into a plurality of period of sub-frame, and this device comprises:
Display control section is suitable for providing the gray level of received image signal; And
Image displaying part is suitable for showing the received image signal that the gray level that provides is provided, wherein for from the relatively outside subframe of the relatively central authorities beginning of a plurality of subframes, relative reduce the brightness value of this gray level.
In the first embodiment of this invention, when this gray level be relative high-high brightness at least 50% the time, so to a plurality of subframes at least one relatively central authorities intensity level of relative maximum brightness value is provided.
In the second embodiment of this invention, when this gray level less than relative maximum brightness level 50% the time, when this gray level less than relative maximum brightness value 50% the time, so from the intensity level that relative minimum is provided in subframe week relatively farthest from the relatively central authorities beginning of a plurality of subframes.
In the 3rd embodiment of this invention, when this gray level less than relative maximum brightness value 50% the time, so from the intensity level that relative minimum is provided in subframe week relatively farthest from the relatively central authorities beginning of a plurality of subframes.
In the 4th embodiment of this invention, when these a plurality of subframes quantitatively are odd number, relatively maximum brightness value is provided at least one central subframe, and when these a plurality of subframes quantitatively are even number, at least two relatively central subframes, provides relatively maximum brightness value.
According to the 85 aspect of the present invention, a kind of computer program is provided, be used for allowing the computing machine execution according to the method for displaying image of the present invention the 14 aspect.
According to the 86 aspect of the present invention, a kind of computer readable recording medium storing program for performing, it has the computer program according to the 85 aspect of the present invention that is stored on it.
According to the 87 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for displaying image of a fifteenth aspect of the present invention.
According to the 80 eight aspect of the present invention, a kind of computer readable recording medium storing program for performing, it has the computer program according to the 87 aspect of the present invention that is stored on it.
According to the 89 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for displaying image of a sixteenth aspect of the present invention.
According to the 90 aspect of the present invention, a kind of computer readable recording medium storing program for performing, it has the computer program according to the 89 aspect of the present invention that is stored on it.
According to the 90 one side of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for displaying image of a seventeenth aspect of the present invention.
According to the 92 aspect of the present invention, a kind of computer readable recording medium storing program for performing, it has the computer program according to the 90 one side of the present invention that is stored on it.
According to the 90 three aspects: of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for displaying image of a eighteenth aspect of the present invention.
According to the 94 aspect of the present invention, a kind of computer readable recording medium storing program for performing, it has the computer program according to the 90 three aspects: of the present invention that is stored on it.
According to the 95 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for displaying image of a nineteenth aspect of the present invention.
According to the 96 aspect of the present invention, a kind of computer readable recording medium storing program for performing, it has the computer program according to the 95 aspect of the present invention that is stored on it.
According to the 97 aspect of the present invention, a kind of computer program is used for allowing the computing machine execution according to the method for displaying image of a twentieth aspect of the present invention.
According to the 90 eight aspect of the present invention, a kind of computer readable recording medium storing program for performing, it has the computer program according to the 97 aspect of the present invention that is stored on it.
According to the 99 aspect of the present invention, a kind of electronic installation is provided, be used for realizing that at the display screen according to the image displaying part of the image display device of a first aspect of the present invention image shows.
According to the 100 aspect of the present invention, a kind of liquid crystal TV is provided, comprising:
Image display device according to a second aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of image display device.
According to the 100 one side of the present invention, a kind of liquid crystal monitoring apparatus medium is provided, comprising:
Image display device according to a second aspect of the present invention; And
Signal processing is used for the monitor image signal that obtains by processing the external monitor signal to the display control section output of image display device.
According to the 102 aspect of the present invention, a kind of electronic installation is used for realizing that at the display screen according to the image displaying part of the image display device of a second aspect of the present invention image shows.
According to the 100 three aspects: of the present invention, a kind of liquid crystal TV is provided, comprising:
Image display device according to a third aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of image display device.
According to the 104 aspect of the present invention, a kind of liquid crystal monitoring apparatus medium is provided, comprising:
Image display device according to a third aspect of the present invention; And
Signal processing is used for the monitor image signal that obtains by processing the external monitor signal to the display control section output of image display device.
According to the 105 aspect of the present invention, a kind of electronic installation is used for realizing that at the display screen according to the image displaying part of the image display device of a third aspect of the present invention image shows.
According to the 106 aspect of the present invention, a kind of liquid crystal TV is provided, comprising:
Image display device according to a fourth aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of image display device.
According to the 107 aspect of the present invention, a kind of liquid crystal monitoring apparatus medium comprises:
Image display device according to a fourth aspect of the present invention; And
Signal processing is used for the monitor image signal that obtains by the external monitor signal to the display control section output of image display device.
According to the 100 eight aspect of the present invention, a kind of electronic installation is used for realizing that at the display screen according to the image display device volume image displaying part of a fourth aspect of the present invention image shows.
According to the 109 aspect of the present invention, a kind of liquid crystal TV is provided, comprising:
Image display device according to a fifth aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of image display device.
According to the 110 aspect of the present invention, a kind of liquid crystal monitoring apparatus medium is provided, comprising:
Image display device according to a fifth aspect of the present invention; And
Signal processing is used for the monitor image signal that obtains by processing the external monitor signal to the display control section output of image display device.
According to the of the present invention the 110 on the one hand, a kind of electronic installation is provided, be used for realizing that at the display screen according to the image displaying part of the image display device of fifth aspect present invention image shows.
According to the 112 aspect of the present invention, a kind of liquid crystal TV is provided, comprising:
Image display device according to a sixth aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of image display device.
According to the 110 three aspects: of the present invention, a kind of liquid crystal monitoring apparatus medium comprises:
Image display device according to a sixth aspect of the present invention; And
Signal processing is used for the monitor image signal that obtains by processing the external monitor signal to the display control section output of image display device.
According to the 114 aspect of the present invention, a kind of electronic installation is used for realizing that at the display screen according to the image displaying part of the image display device of a sixth aspect of the present invention image shows.
According to the 115 aspect of the present invention, a kind of liquid crystal TV comprises:
Image display device according to a seventh aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of image display device.
According to the 116 aspect of the present invention, a kind of liquid crystal monitoring apparatus medium is provided, comprising:
Image display device according to a seventh aspect of the present invention; And
The Graphics Processing part is used for the monitor image signal that obtains by processing the external monitor signal to the display control section output of image display device.
According to the 117 aspect of the present invention, a kind of electronic installation is used for realizing that at the display screen according to the image displaying part of the image display device of a seventh aspect of the present invention image shows.
According to the 110 eight aspect of the present invention, a kind of liquid crystal TV comprises:
Image display device according to a eighth aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of image display device.
According to the 119 aspect of the present invention, a kind of liquid crystal monitoring apparatus medium comprises:
Image display device according to a eighth aspect of the present invention; And
Signal processing is used for the monitor image signal that obtains by processing the external monitor signal to the display control section output of image display device.
According to the 120 aspect of the present invention, a kind of electronic installation is used for realizing that at the display screen according to the image displaying part of the image display device of eighth aspect present invention image shows.
According to the 120 one side of the present invention, a kind of liquid crystal TV comprises:
Image display device according to a ninth aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of image display device.
According to the 122 aspect of the present invention, a kind of liquid crystal monitoring apparatus medium comprises:
Image display device according to a ninth aspect of the present invention; And
Signal processing is used for the monitor image signal that obtains by processing the external monitor signal to the display control section output of image display device.
According to the 120 three aspects: of the present invention, a kind of electronic installation is used for realizing that at the display screen according to the image displaying part of the image display device of a ninth aspect of the present invention image shows.
According to the 124 aspect of the present invention, a kind of liquid crystal TV is provided, comprising:
The device that is used for demonstration according to the 50 one side of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of the device that is used for showing.
According to the 125 aspect of the present invention, a kind of liquid crystal monitoring apparatus medium comprises:
The device that is used for demonstration according to the 50 one side of the present invention; And
Signal processing is used for the monitor image signal that obtains by processing the external monitor signal to the display control section output of the device that is used for showing.
According to the 126 aspect of the present invention, a kind of electronic installation is used for realizing that according to the of the present invention the 50 on the one hand the display screen of the image displaying part that is used for the device that shows image shows.
According to the 127 aspect of the present invention, a kind of liquid crystal TV comprises:
The device that is used for demonstration according to the 52 aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of the device that is used for showing.
According to the 120 eight aspect of the present invention, a kind of liquid crystal monitoring apparatus medium comprises:
The device that is used for demonstration according to the 52 aspect of the present invention; And
Signal processing is used for the monitor image signal that obtains by processing the external monitor signal to the display control section output of the device that is used for showing.
According to the 129 aspect of the present invention, a kind of electronic installation is used for realizing that at the display screen of the image displaying part of the device that shows according to being used for aspect the of the present invention the 52 image shows.
According to the 130 aspect of the present invention, a kind of liquid crystal TV comprises:
The device that is used for demonstration according to the 82 aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of the device that is used for showing.
According to the 130 one side of the present invention, a kind of liquid crystal monitoring apparatus medium comprises:
The device that is used for demonstration according to the 82 aspect of the present invention; And
Signal processing is used for the monitor image signal that obtains by processing the external monitor signal to the display control section output of the device that is used for showing.
According to the 132 aspect of the present invention, a kind of electronic installation is used for realizing that at the display screen of the image displaying part of the device that shows according to being used for aspect the of the present invention the 82 image shows.
According to the 130 three aspects: of the present invention, a kind of liquid crystal TV comprises:
The device that is used for demonstration according to the 84 aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the display control section output of the device that is used for showing.
According to the 134 aspect of the present invention, a kind of liquid crystal monitoring apparatus medium comprises:
The device that is used for demonstration according to the 84 aspect of the present invention; And
Signal processing is used for the monitor image signal that obtains by processing the external monitor signal to the display control section output of the device that is used for showing.
According to the 135 aspect of the present invention, a kind of electronic installation is used for realizing that at the display screen of the image displaying part of the device that shows according to being used for aspect the of the present invention the 84 image shows.
According to the 136 aspect of the present invention, a kind of liquid crystal TV comprises:
The device that is used for demonstration according to the 49 aspect of the present invention; And
Tuner pack is used for to the TV broadcast singal of the selected channel of the device output for providing of the device that is used for showing.
According to the 146 aspect of the present invention, a kind of liquid crystal monitoring apparatus medium comprises:
The device that is used for demonstration according to the 80 three aspects: of the present invention; And
Signal processing is used for the monitor image signal that obtains by processing the external monitor signal to the device output that is used for providing of the device that is used for showing.
According to the 147 aspect of the present invention, a kind of electronic installation is used for realizing the image demonstration at the display screen for the device that shows for the device that shows according to the 80 three aspects: of the present invention.
According to device of the present invention, method and program, when the luminance level that is applied to Moving Objects in the first period of sub-frame is luminance level than the luminance level less that is applied to the second period of sub-frame, the background luminance level of then using in the first period of sub-frame is also than the luminance level less that is applied to the second period of sub-frame, and, when the luminance level that is applied to Moving Objects in the first period of sub-frame is during than the relatively large luminance level of the luminance level that is applied to the second period of sub-frame, the background luminance level of then using in the first period of sub-frame is also relatively large than the luminance level that is applied to the second period of sub-frame.Therefore, can suppress reducing of the picture quality that causes owing to motion blur, this reducing is a problem that usually can exist in the hand-held image display device.In addition, can alleviate because the moving image quality that motion blur causes worsens, this deterioration often can occur in common hand-held image display device.Even when maximum gray scale showed, the high-high brightness that minimum (brightness) insertion system of use (adopting this system each frame period to comprise the minimum brightness cycle) produces and contrast reduce can be suppressed.
Below, with the function of the present invention of describing by being provided by the above structure.
According to the present invention, in a frame period, be provided with in the handheld image display device of a plurality of period of sub-frame, control like this gray level of each period of sub-frame, that is: when the minimizing aspect high-high brightness or contrast is suppressed, do not move according to the gray level of received image signal in the time state center of the center of gravity of this display brightness.Therefore, prevented that the quality of moving image is owing to this motion blur is lowered.
For example, in by the situation of in n period of sub-frame (wherein n is equal to or greater than 2 integer), asking image demonstration time integral value and that realize a frame that is displayed on the brightness in the image displaying part, in the period of sub-frame that is in time state center or time of closest approach state center in a frame period, surpass in the scope of corresponding intensity level in the gray level of received image signal, provide maximum or sufficiently high gray level (than the large gray level of the value of defined).When reaching the gray level of received image signal, provide in the period of sub-frame minimum or enough low gray levels (less than the gray level of the value of defined) in residue.
Be to be equal to or greater than in the situation of 3 odd number at n, in the period of sub-frame that is in time state center (m period of sub-frame, wherein m=(n+1)/2), provide maximum or sufficiently high gray level (greater than the gray level of the value of defined).In the period of sub-frame before or after central period of sub-frame, provide the gray level that is increased or reduces according to the gray level of received image signal.Provide in the period of sub-frame minimum or enough low gray levels (less than the gray level of the value of defined) in residue.Whether the gray level according to received image signal is higher than threshold level T, determines to be provided for the gray level of each period of sub-frame.
To be equal to or greater than in the situation of 2 even number at n, at the time state center or period of sub-frame (m1 period of sub-frame and the m2 period of sub-frame at time of closest approach state center, wherein m1=n/2 and m2=n/2+1) in, maximum or sufficiently high gray level (greater than the gray level of the value of defined) is provided.Before central period of sub-frame and in the period of sub-frame afterwards, provide the gray level that is increased or reduces according to the gray level of received image signal.Provide in the period of sub-frame minimum or enough low gray levels (less than the gray level of the value of defined) in residue.Whether the gray level according to received image signal is higher than this threshold level T, determines to be provided for the gray level of each period of sub-frame.
By this control, the time state center of the center of gravity of display brightness is fixed to the period of sub-frame that is positioned at time state center or time of closest approach state center in the frame period.Therefore, for example having suppressed, Japan speciallys permit the technical matters that open No.2001-296841 has, namely uneven according to the gray scale of received image signal in the heart the brightness of change Anomalies Caused or color in the time state of the center of gravity of display brightness, namely reduced the problem of picture quality.Because the display brightness in a frame period has carried out suitably changing, fade so alleviated in general traditional handheld image display device caused because the qualitative of moving image that motion blur causes.Even when realize this demonstration at maximum gray scale, can suppress with minimum (brightness) insertion system (therein, each frame period comprises the brightness cycle of a minimum) occur together in the minimizing aspect high-high brightness and the contrast.
2 at n, one of them period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as in the situation of period of sub-frame β, in period of sub-frame α, and the gray level that maximum or sufficiently high gray level is provided or is increased or reduces according to the gray level of received image signal.Whether the gray level according to received image signal is higher than this threshold level, determines to be provided at the gray level in the period of sub-frame.
By this control, the motion at the time state center of the center of gravity of brightness can be minimized.Therefore, suppressed the problem that the open No.2001-296841 of Japan's special permission for example possesses skills, namely according to the gray scale of received image signal in the heart the brightness of change Anomalies Caused or the color imbalance problem that namely reduced picture quality in the time state of the center of gravity of display brightness.Because the display brightness in a frame period suitably changes, fade so alleviated the qualitative of moving image that caused because motion blur causes in general traditional handheld image display device.Even when realize this demonstration at maximum gray scale, can suppress with minimum (brightness) insertion system occur in the minimizing aspect high-high brightness and the contrast.
In 2 the situation, based on two two field pictures of being inputted continuously, can be created in a two field picture of time-related intermediateness at n.In this case, whether be higher than this threshold level according to the gray level at the image of intermediateness, can determine to be provided at the gray level among the period of sub-frame β.In this case, by estimating to produce the image of the state that mediates in time.Therefore, the mistake that is caused by the interpolation error that may occur in some pixel portion shows and just is difficult to feel.
In 2 the situation at n, whether can determine to be provided at gray level among the period of sub-frame β greater than a value according to this threshold value, this value is according to asking the gray level of (i) received image signal and (ii) picture signal of input or obtained by the mean value of the gray level of the picture signal of input after the frame before a frame period.
Setting is provided at the upper limit (greatest level) of the gray level in the period of sub-frame, so that for the period of sub-frame that is in time state center or time of closest approach state center, the grade of this upper limit is the highest, and because this period of sub-frame is from the distant minimizing in this center, perhaps so that this upper limit is all identical.By this set, even when the gray scale of received image signal is very high, also can provide wherein brightness very low period of sub-frame.Therefore, even when the gray scale of received image signal is very high, the deterioration that also can alleviate (such as what cause in traditional handheld image display device) the moving image quality aspect that is caused by motion blur.When n=2, the upper limit that can be provided at the gray level among of this period of sub-frame is set to be equal to or higher than the upper limit that is provided at the gray level in another period of sub-frame.
Setting is provided at gray level and the threshold level in this period of sub-frame, so that the relation between the gray level of received image signal and the time integral brightness represents a kind of gamma light characteristic.Therefore, can alleviate the deterioration of (such as what cause in traditional handheld image display device) the moving image quality aspect that is caused by motion blur, the picture signal that guarantees simultaneously to produce with the gamma light characteristic of considering CRT is in the consistance aspect the gradation reproducibility.
A kind of temperature detection part for detection of a plate or near the temperature it can be provided, so that according to detected temperature, can change the gray level or the threshold level that are provided in the period of sub-frame.Therefore, even when using display element such as liquid crystal display cells, also can keep the gray level of received image signal and the relation between the display brightness, wherein adopt this display element, under certain temperature, the response speed that increases for brightness may be different with the response speed that reduces for brightness.
Have at received image signal in the situation of a plurality of color element, this gray level is set, so as to have received image signal high grade grey level color be displayed on the ratio between the intensity level in this period of sub-frame of being displayed on that ratio between the intensity level in this period of sub-frame equals to have color except the color of the high grade grey level of received image signal.
At this moment, even greatly different in different colors when luminance balance, can prevent that also the phenomenon of anomalous trichromatism from appearring in the luminance balance owing to impaired three kinds of colors in the demonstration of moving image.
Below, will describe corresponding to claim and will be assumed to be the whole bag of tricks of distributing to a plurality of period of sub-frame for the intensity level of received image signal.As described in greater detail, adjust this gray level, in order to realize being assumed to be the intensity level for received image signal.
In the following description, for the sake of clarity, distribute the gray level of received image signal, so that this gray level little by little is added to a predetermine level.According to the present invention, this distribution be actually by, for example, thereby utilize look-up table etc. to calculate or the instantaneous realization of conversion based on carry out distribution with upper type according to received image signal ground gray level.
As shown in Figure 67 (a), from the position at the time state center that is in a frame period that shows for image or time of closest approach state center, sequentially distribute the intensity level that is assumed to be for received image signal.Then, realize this period of sub-frame is distributed to the left side or the right of the period of sub-frame that provides intensity level.Each distribution that realizes a period of sub-frame is until fill each period of sub-frame.To remain intensity level and distribute to remaining period of sub-frame, the intensity level of distributing with toilet equals to be assumed to be the intensity level for received image signal.Thereby finish distribution.
As shown in Figure 67 (b), from a period of sub-frame at the time state center that is in a frame period that shows for image, sequentially distribute the intensity level that is assumed to be for received image signal.Then, realize two period of sub-frame are distributed to the left side or the right of the period of sub-frame that provides this intensity level.Each distribution that realizes simultaneously two period of sub-frame is until fill each period of sub-frame.Reference corresponding to the gray level of the intensity level that will be assigned to the ensuing period of sub-frame after filling some period of sub-frame is the threshold level.To remain intensity level and distribute to ensuing two period of sub-frame, the intensity level of distributing with toilet equals to be assumed to be the intensity level for received image signal.Thereby finish distribution.
As shown in Figure 67 (c), from the time state center that is in a frame period that shows for image, sequentially distribute the intensity level that is assumed to be for received image signal.Then, realize two period of sub-frame are distributed the left side or the right of the period of sub-frame that has provided this intensity level.Each distribution that realizes simultaneously two period of sub-frame is until fill each period of sub-frame.Reference corresponding to the gray level of the intensity level that will be assigned to the ensuing period of sub-frame after filling some period of sub-frame is the threshold level.To remain intensity level and distribute to ensuing two period of sub-frame, the intensity level of distributing with toilet equals to be assumed to be the intensity level for received image signal.Thereby finish distribution.
As shown in Figure 67 (d), one (as represented with point) since two period of sub-frame, sequentially distribute the intensity level that is assumed to be for received image signal.When filling this period of sub-frame with this intensity level (as represented with shade; This threshold level T) time, another period of sub-frame is distributed this intensity level (as using point represented).
As shown in Figure 68 (e), since one (as represented with point) of two period of sub-frame, sequentially distribute the intensity level that is assumed to be for received image signal.When being assumed to be that gray level for the intensity level of received image signal reaches the heavy threshold level T1 of this period of sub-frame, also this intensity level is distributed to another period of sub-frame (as represented with point), also distribute to the first period of sub-frame.When the gray level corresponding to this intensity level reaches threshold level T2 in the first period of sub-frame, will remain intensity level and distribute to the second period of sub-frame (as represented with point), and finish distribution.
As shown in Figure 68 (f), since one (as represented with point) of two period of sub-frame, sequentially distribute the intensity level that is assumed to be for received image signal.When being assumed to be that gray level for the intensity level of received image signal reaches the threshold level T1 of this period of sub-frame, the intensity level that is assigned to this period of sub-frame is temporarily fixed (namely suspend distribute), and will be assumed to be for the intensity level of received image signal and distribute to another period of sub-frame (as represented with point).When being assumed to be that gray level for the intensity level of received image signal reaches the threshold level T2 of the second period of sub-frame, discharge from the state that is fixed and to be assigned to the intensity level of the first period of sub-frame, and will remain intensity level and distribute to the first period of sub-frame (as represented with putting).
As shown in Figure 68 (g), since one (as represented with point) of two period of sub-frame, sequentially distribute the intensity level that is assumed to be for received image signal.When the gray level of received image signal reached threshold level T, in a period of sub-frame, this intensity level was the highest.Consider the image state of next frame, an intensity level is distributed to another period of sub-frame.Especially, check the image of current input and whether distinctly then will be transfused between the image of (that is, this motion).When having any different, to remain intensity level and distribute to the second period of sub-frame, so that the intensity level of the second period of sub-frame be in time the current image that is transfused to and the image that then will be transfused between (that is, estimate between two images image) intermediateness be assumed to be intensity level for received image signal.Then, fill the first period of sub-frame with being assumed to be for the intensity level of received image signal.
As shown in Figure 68 (h), since one (as represented with point) of two period of sub-frame, sequentially distribute the intensity level that is assumed to be for received image signal.When the gray level corresponding to the intensity level of distributing reached threshold level T, in a period of sub-frame, this intensity level was the highest.The mean value of the image that calculates the image of current input and then will be transfused to, and will be assumed to be for the residue intensity level of the received image signal of this mean value and distribute to another period of sub-frame.Then, fill the first period of sub-frame with being assumed to be for the intensity level of this received image signal.
As shown in Figure 69 (i) and 69 (j), these period of sub-frame have equal length or different length.
When the Length Ratio of a period of sub-frame more in short-term, obtain higher pulse effects.When this period of sub-frame was long, the center of the center of gravity of brightness was easy to more approaching long period of sub-frame, and is not easy motion.
As shown in Figure 69 (k), sequentially distribute the intensity level that is assumed to be for received image signal since one (as represented with point) of two period of sub-frame.When being assumed to be that gray level for the intensity level of received image signal reaches the threshold level T1 of this period of sub-frame, also this intensity level is distributed to another period of sub-frame (as represented with point).Distribute this intensity level, so that this gray level or the difference that is assigned between the intensity level of two period of sub-frame are constant.
As shown in Figure 69 (l), sequentially distribute the intensity level that is assumed to be for received image signal since one (as represented with point) of two period of sub-frame.When being assumed to be that gray level for the intensity level of received image signal reaches the threshold level T1 of this period of sub-frame, also this intensity level is distributed to another period of sub-frame (as represented with point).Distribute this intensity level, so as this gray level or be assigned to difference between the intensity level of two period of sub-frame and function that one predetermined (value that for example, obtains by this constant and a predetermined multiplication) consistent.
As shown in Figure 70 (m), when for the liquid crystal material of the increase aspect the brightness the response time＞during response time of liquid crystal material of minimizing aspect brightness, distribute intensity level since the second period of sub-frame.When for the liquid crystal material of the increase aspect the brightness the response time＜during response time of liquid crystal material of minimizing aspect brightness, distribute intensity level since the first period of sub-frame.
As shown in Figure 70 (n), when display element for from the response time＞display element of the luminance transformation (brightness is increased) of Lmin to Lmax for from response time of the luminance transformation (brightness is reduced) of Lmax to Lmin the time, distribute intensity level since the second period of sub-frame.When display element for from the response time＜display element of the luminance transformation (brightness is increased) of Lmin to Lmax for from response time of the luminance transformation (brightness is reduced) of Lmax to Lmin the time, distribute intensity level since the first period of sub-frame.
As shown in Figure 70 (o), sequentially distribute the intensity level that is assumed to be for received image signal since one (as represented with point) of two period of sub-frame.When being assumed to be that gray level for the intensity level of received image signal reaches the upper limit L of this period of sub-frame (as represented with shade; Threshold level T), this intensity level is distributed to another period of sub-frame (as using point represented).
As shown in Figure 70 (p), (as represented with point) distributes the intensity level that is assumed to be for received image signal from the period of sub-frame at the time state center that is in a frame period.When the gray level corresponding to the intensity level of middle-jiao yang, function of the spleen and stomach period of sub-frame reaches maximum L1 (as represented with shade; Threshold level T1), this intensity level is distributed to simultaneously period of sub-frame (as represented with point) by the right of central period of sub-frame and the left side.It is (represented such as the usefulness shade when the meeting corresponding to the intensity level in these period of sub-frame reaches the second maximum L2 to note; Threshold level T2), this intensity level is distributed to period of sub-frame by the left side and the right of these period of sub-frame (as represented with point), until reach minimum upper limit L3 corresponding to the gray level of the intensity level in these period of sub-frame.
As shown in Figure 71 (q), sequentially distribute the intensity level that is assumed to be for received image signal since one (as represented with point) of two period of sub-frame.When the gray level corresponding to this intensity level reaches higher upper limit L1 (as represented with shade; Threshold level T), this intensity level is distributed to another period of sub-frame, until this intensity level reaches lower upper limit L2 (as using point represented).
As shown in Figure 71 (r), a beginning from two period of sub-frame at the time state center that is in a frame period (as represented with point) distributes the intensity level that is assumed to be for received image signal.Intensity level in this period of sub-frame is set, so that a suitable gamma light characteristic is reproduced in time integral brightness.When filling this period of sub-frame (as represented with shade), another (as represented with point) of distributing to two period of sub-frame at the time state center that is in a frame period for the intensity level of received image signal will be assumed to be.Intensity level in the period of sub-frame is set, so that a suitable gamma light characteristic is reproduced in time integral brightness.When having filled that period of sub-frame (as represented with shade), will be related to the period of sub-frame (as represented with point) of distributing to contiguous that period of sub-frame for the intensity level of received image signal.Intensity level in the period of sub-frame is set, so that a suitable gamma light characteristic is reproduced in time integral brightness.When having filled that period of sub-frame (as represented with shade), the period of sub-frame (as represented with point) of distributing to contiguous the first central period of sub-frame for the intensity level of received image signal will be assumed to be.Intensity level in the period of sub-frame is set, so that a suitable gamma light characteristic is reproduced in time integral brightness.Repeat such operation.Thereby, at first distribute to the period of sub-frame that is in time state center or time of closest approach state center with being assumed to be for the intensity level of received image signal, and then distribute to the period of sub-frame on the left side and the right of this central authorities' period of sub-frame.
As shown in Figure 71 (s), a beginning from the period of sub-frame at the time state center that is in a frame period (as represented with point) distributes the intensity level that is assumed to be for received image signal.Intensity level in this period of sub-frame is set, so that a suitable gamma light characteristic is reproduced in time integral brightness.(represented such as the usefulness shade when filling this period of sub-frame; Threshold level T1), will be assumed to be simultaneously for the intensity level of received image signal and distribute to period of sub-frame by the left side and the right of middle-jiao yang, function of the spleen and stomach period of sub-frame (as represented with point).Intensity level in this period of sub-frame is set, so that a suitable gamma light characteristic is reproduced in time integral brightness.(represented such as the usefulness shade when filling these period of sub-frame; Threshold level T2), will be assumed to be that intensity level for received image signal offers the period of sub-frame (as represented with point) by the left side and the right of these period of sub-frame simultaneously.Intensity level in this period of sub-frame is set, so that a suitable gamma light characteristic is reproduced in time integral brightness.Repeat this operation.Therefore, will be assumed to be that the intensity level for received image signal at first distributes to the period of sub-frame that is in the time state center, and then distribute to the period of sub-frame by the left side and the right of this central authorities' period of sub-frame.
According to the present invention, in the time integral image display device that shows with the image of realizing a frame period extremely that is used for by asking the brightness that is displayed on a plurality of period of sub-frame, control is provided at the gray level of the picture signal in each period of sub-frame.At this moment, when showing a moving image, can minimize a distance, by this distance, move according to the gray level of received image signal in the time state center of the center of gravity of brightness.This just provides following effect: (i) suppressed the minimizing of high-high brightness or contrast aspect, (ii) suppressed because the deterioration that incorrect brightness and color imbalance cause, this is owing to depend on the time state center of center of gravity of brightness of the gray level of received image signal move significantly viewedly when showing moving image; And (iii) alleviated because the deterioration in the moving image that causes along with the motion blur of the problem of traditional handheld image display device.
According to the present invention, setting is provided at the gray level of the picture signal in each period of sub-frame and with the threshold level of the reference that acts on this gray level, so as the gray level of received image signal and in the frame period relation between the time integral brightness represent a suitable gamma light characteristic.Therefore, can alleviate the qualitative deterioration of the moving image that causes owing to this motion blur, the traditional picture signal that guarantees simultaneously to produce with the gamma light characteristic of considering CRT is in the consistance aspect the gradation reproducibility.
According to the present invention, according to display board or near the temperature it, arrange that machine is lost in the meeting be provided at the picture signal in each period of sub-frame and with the threshold level of the reference that acts on this gray level.Therefore, even when using display element such as liquid crystal display cells, also can keep the relation between received image signal and the display brightness, wherein adopt this display element, under a certain temperature, the response speed that increases for brightness may be different with the response speed that reduces for brightness.
Therefore, invention described herein can access and provide: a kind of advantage of handheld image display device, this handheld device used for image display is in the minimizing that is suppressed at high-high brightness and contrast aspect, minimize since from the deterioration of the quality aspect that causes according to the time state center of the center of gravity of the different display brightness of the gray level of received image signal, and minimize deterioration by the represented moving image quality of afterimage and motion blur, simultaneously with have picture signal that general light characteristic (for example gamma light characteristic) produces for the output of phase images display device consistent aspect representing in gray scale; A kind of electronic installation, a kind of liquid crystal TV, a kind of liquid crystal monitoring apparatus medium, they have used this image display device for the display part; A kind of method for displaying image that utilizes this image display device to realize the image demonstration; A kind of display control program, it is used for allowing computing machine to carry out this method for displaying image; And a kind of computer readable recording medium storing program for performing, have the display control program that is recorded on it.
By read with reference to the accompanying drawings and understand below by the explanation of refinement, to those skilled in the art, these and other advantage of the present invention will become clearly.
Description of drawings
Fig. 1 is that explanation is according to the calcspar of the basic structure of image display device of the present invention.
Fig. 2 is the calcspar of the example arrangement of the LSI of controller shown in Fig. 1.
Fig. 3 is the sequential chart according to the signal in the image display device in the example 1 of the present invention.
How Fig. 4 shows by repeating the demonstration shown in the image restraint device in example 1 and controls to rewrite picture signal on this screen.
Fig. 5 shows when using the display board of regulation in the change aspect the gray level of received image signal.
Fig. 6 show gray level at received image signal be according to situation about changing shown in Fig. 5 under, the brightness when period of sub-frame α is configured to be configured to the second period of sub-frame to the first period of sub-frame and period of sub-frame β in the display board changes.
Fig. 7 show gray level at received image signal be according to situation about changing shown in Fig. 5 under, the brightness when period of sub-frame β is configured to be configured to the second period of sub-frame to the first period of sub-frame and period of sub-frame α in the display board changes.
Fig. 8 has illustrated the target brightness levels in the example 1.
Fig. 9 show the gray level of received image signal and be provided at the first period of sub-frame and the second period of sub-frame in gray level between relation, it satisfies the expression formula (2) in the example 1.
Figure 10 show when an object during along with the static background horizontal ground motion in the image display device in the example 1 brightness according to the time on the horizontal line in a screen change.
Figure 11 shows the distribution of being seen the brightness of image aspect shown in Figure 10 by observer's eyes towards Moving Objects.
Figure 12 shows when the gray level that is provided for the picture signal that is used in the display board in the example 1 is not adjusted according to temperature conditions according to the difference of temperature conditions in brightness.
Figure 13 shows when the gray level that is provided for the picture signal that is used in the display board in the example 1 is adjusted according to temperature conditions according to the difference of temperature conditions in brightness.
Figure 14 shows and changes gradually the brightness that is assumed to be for received image signal in the image display device in example 1.
Figure 15 show when an object with the brightness shown in Figure 14 during along with the static background horizontal ground motion in the image display device in the example 1 brightness according to time of a horizontal line in a screen change.
Figure 16 shows the distribution of the brightness aspect of the image shown in the Figure 15 that is observed by the observer's who notes Moving Objects eyes.
Figure 17 has illustrated according to the target brightness levels in the example 2 of the present invention.
Figure 18 show the gray level of received image signal and be provided at the first period of sub-frame and the second period of sub-frame in gray level between relation, it satisfies the expression formula (2) in the example 2.
Figure 19 show when an object during with the static background horizontal ground motion in the image display device in the example 2 brightness according to time of a horizontal line in the screen change.
Figure 20 shows the distribution of the brightness aspect of the image shown in the Figure 19 that is observed by the observer's who notes Moving Objects eyes.
Figure 21 has illustrated according to the target brightness levels in the example 3 of the present invention.
Figure 22 show the gray level of received image signal and be provided at the first period of sub-frame and the second period of sub-frame in gray level between relation, it satisfies the expression formula (2) in the example 3.
Figure 23 show when an object during along with the static background horizontal ground motion in the image display device in the example 3 brightness according to time of a horizontal line in the screen change.
Figure 24 shows the distribution of the brightness aspect of the image shown in the Figure 23 that is observed by the observer's who notes Moving Objects eyes.
Figure 25 has illustrated according to the target brightness levels in the example 4 of the present invention.
Figure 26 show the gray level of received image signal and be provided at the first period of sub-frame and the second period of sub-frame in gray level between relation, it satisfies the expression formula (2) in the example 4.
Figure 27 show when an object during along with the static background horizontal ground motion in the image display device in the example 4 brightness according to time of a horizontal line in the screen change.
Figure 28 shows the distribution of the brightness of the image shown in the Figure 27 that is observed by the observer's who notes Moving Objects eyes.
Figure 29 shows when being provided at when not adjusting according to temperature conditions for the gray level of the picture signal of the display board of example 4 according to temperature conditions in the difference aspect the brightness.
Figure 30 shows when being provided at when adjusting according to temperature conditions for the gray level of the picture signal of the display board of example 4 according to temperature conditions in the difference aspect the brightness.
Figure 31 show when an object with dark red assembly and light green and blue assembly along with according to the black static background horizontal ground motion in the image display device in the example 5 of the present invention the time according to screen in the brightness of time of a horizontal line change.
Figure 32 show when an object with dark red assembly and light green and blue assembly during along with the black static background horizontal ground motion in another image display device in the example 5 according to screen in the brightness of time of a horizontal line change.
Figure 33 shows the calcspar of the example arrangement of the LSI of controller shown in Fig. 1.
Figure 34 is the sequential chart according to the signal in the image display device in the example 6 of the present invention.
Figure 35 shows the picture signal that rewrites in the image display device in example 6 how on this screen.
Figure 36 show when an object during along with the static background horizontal ground motion of the image display device in the example 6 brightness according to time of a horizontal line in the screen change.
Figure 37 shows the distribution of the brightness of the image shown in the Figure 36 that is observed by the observer's who notes Moving Objects eyes.
Figure 38 is the calcspar according to the example arrangement in the example 7 of the present invention of the LSI of controller shown in Fig. 1.
Figure 39 show when an object during along with the static background horizontal ground motion of the image display device in the example 7 brightness according to time of a horizontal line in the screen change.
Figure 40 shows the distribution of the brightness of the image shown in the Figure 39 that is observed by the observer's who notes Moving Objects eyes.
Figure 41 is the calcspar according to the example arrangement in the example 8 of the present invention of the LSI of controller shown in Fig. 1.
Figure 42 is the sequential chart according to the signal in the image display device in the example 8 of the present invention.
Figure 43 shows the picture signal that how to rewrite on the screen in the image display device of example 8.
Figure 44 show when an object during along with the static background horizontal ground motion of the image display device in the example 8 brightness according to time of a horizontal line in the screen change.
Figure 45 shows the distribution of the brightness of the image shown in the Figure 44 that is observed by the observer's who notes Moving Objects eyes.
Figure 46 show when an object during along with the static background horizontal ground motion of the image display device of traditional impulse type the brightness according to time of a horizontal line in the screen change.
Figure 47 shows the distribution of the brightness of the image shown in the Figure 46 that is observed by the observer's who notes Moving Objects eyes.
Figure 48 show when an object during along with the static background horizontal ground motion of general traditional handheld image display device the brightness according to time of a horizontal line in the screen change.
Figure 49 shows the distribution of the brightness of the image shown in the Figure 48 that is observed by the observer's who notes Moving Objects eyes.
Figure 50 show when an object during along with the static background horizontal ground motion of the handheld image display device that is suitable for minimum (brightness) insertion system the brightness according to time of a horizontal line in the screen change.
Figure 51 shows the distribution of the brightness of the image shown in the Figure 50 that is observed by the observer's who notes Moving Objects eyes.
Figure 52 shows when the brightness according to time of a horizontal line in the screen along with by the static background horizontal ground motion of the open handheld image display device of the disclosed tradition of No.2001-296841 of Japan special permission time of an object and changes.
Figure 53 shows the distribution of the brightness of the image shown in the Figure 52 that is observed by the observer's who notes Moving Objects eyes.
Figure 54 shows the gray level of traditional received image signal that the gamma light characteristic of considering CRT produces and the relation between this display brightness, and the relation between the display brightness in the gray level of a picture signal and the traditional handheld image display device consistent with traditional picture signal.
Figure 55 show the gray level of a picture signal and the image display device of being advised by the open No.2001-296841 of the Japan special permission that comprises traditional handheld display board in display brightness between relation.
Figure 56 show when an object during along with the static background horizontal ground motion of general handheld image display device the brightness according to time of a horizontal line in the screen change.
Figure 57 shows the distribution of the brightness of the image shown in the Figure 56 that is observed by the observer's who notes Moving Objects eyes.
Figure 58 show when an object along with the image display device in the example 1 have the static background horizontal ground motion of certain luminance the time change according to the brightness of time of a horizontal line in the screen.
Figure 59 shows the distribution of the brightness of the image shown in the Figure 58 that is observed by the observer's who notes Moving Objects eyes.
Figure 60 explanation is according to the calcspar of the basic structure of the image display device in the example 9 of the present invention.
Figure 61 is the calcspar of the example arrangement of the LSI of controller shown in Figure 60.
Figure 62 show gray level, the gray level in the first and second period of sub-frame of the received image signal with different target intensity level and the brightness felt between 6 examples of relation.
Figure 63 is the gray level of explanation received image signal when using look-up table A to C and the curve map of the relation between the time integral brightness during the first and second period of sub-frame (brightness of feeling).
Figure 64 is the calcspar of the structure of the image display control section that provided by computing machine in example 10 according to the present invention.
Figure 65 is the calcspar that uses according to the structure of the liquid crystal TV in the example 11 of a kind of image display device of the present invention.
Figure 66 is the calcspar that uses according to the structure of the liquid crystal monitoring apparatus medium in the example 12 of a kind of image display device of the present invention.
Figure 67 (a) is to (d), Figure 68 (e) is to (h), Figure 69 (i) is to (l), Figure 70 (m) to (p) and Figure 71 (q) show the conceptual view of period of sub-frame to (s), they have provided in image display device according to the present invention, are used for being assumed to be the illustrative methods of distributing to described period of sub-frame for the intensity level of received image signal.
The explanation of preferred embodiment
Below with reference to the accompanying drawings, with illustrative example 1 to 12 explanation the present invention.
In this manual, term " gray level " refers to the level of input signal.Term " intensity level " refers to the brightness degree of shown image.
Fig. 1 shows the calcspar according to the basic structure of the image display device 1 of example 1 to 8 of the present invention.
As shown in Figure 1, image display device 1 comprises display board 10 (image displaying part, namely, image display area), temperature sensor IC 20 (temperature detection part), for detection of near the temperature of a part the temperature of display board 10 or the display board 10, be used for the frame memory 30 (frame data memory portion) of storage one two field picture and be used for the controller LSI 40 (display control section) of the various piece of control image display 1.
Display board 10 comprises that display component array 11, TFT substrate 12, source electrode driver 13a are to 13d, gate drivers 14a to 14d.
Array of display 11 comprises a plurality of display element 11a (pixel portion) in the matrix.These a plurality of display element 11a are formed by liquid crystal material or organic EL (electroluminescence) material.
In the viewing area of TFT substrate 12, a plurality of pixel electrode 12a that are used for driving respectively display element 11a and a plurality of TFT12b are provided.Described a plurality of TFT12b is respectively applied to open or close the demonstration voltage supply to pixel electrode 12a.A plurality of pixel electrode 12a and a plurality of TFT12b and display element 11a consistently are arranged in the matrix.In the zone of display component array 11 and TFT substrate 12, provide the first to the 4th source electrode driver 13a to 13d and the first to the 4th gate drivers 14a to 14d.The first to the 4th source electrode driver 13a drives pixel electrode 12a and display element 11a to the TFT12b that 13d is used for passing through separately.The first to the 4th gate drivers 14a is used for drive TFT 12b to 14d.
In the viewing area of TFT substrate 12, provide to be connected to the first to the 4th source electrode driver 13a to 13d in order to a plurality of source voltage lines of source voltage (demonstration voltage) are provided, and be connected to the first to the 4th gate drivers 14a to 14d in order to a plurality of grid voltage lines of grid voltage (scanning voltage signal) are provided.A plurality of source voltage lines and a plurality of grid voltage line are arranged intersected with each otherly, for example, are perpendicular to one another.Each point of crossing at source voltage line and grid voltage line provides pixel electrode 12a and TFT12b.The gate electrode of each TFT12b is connected to grid voltage line (that is, passing the grid voltage line of corresponding tie point) separately.The source electrode of each TFT12b is connected to source voltage line (that is, passing the source voltage line of corresponding tie point) separately.The drain electrode of each TFT12b is connected to pixel electrode 12a separately.
The source voltage line that is connected in the left side of each source electrode driver (source electrode driver 13a is to 13d) is called as the first source voltage line, and the source voltage line adjacent with the first source voltage line is called the second source voltage line.To censure by this way the source voltage line, and the source voltage line that is connected in the rightmost side of each source electrode driver is called as last source voltage line.The grid voltage line that is connected in the topmost of each gate drivers (gate drivers 14a is to 14d) is called as the primary grid voltage line, and the grid voltage line adjacent with the primary grid voltage line is called as the second grid voltage line.To censure by this way the grid voltage line, and the minimum grid voltage line that is connected in each gate drivers is called as last grid voltage line.
For simplicity, Fig. 1 only shows the first source voltage line, the primary grid voltage line that is connected in first grid driver 14a that are connected in the first source electrode driver 13a, is connected thereon TFT12b, is connected in the pixel electrode 12a of TFT12b and corresponding to the display element 11a of pixel electrode 12a.
Near display board 10, temperature sensor IC20 is provided, for detection of near the temperature display board 10 or the display board 10, and be used for exporting this temperature with the temperature levels signal.The frame memory 30 that is used for keeping received image signal also is provided near display board 10.Controller LSI10 also is provided near display board 10, be used for to source electrode driver 13a to 13d and gate drivers 14a to the 14d output signal, be used for access frame memory 30 and store therein data, and be used for reading the temperature levels signal from temperature sensor IC20 output, and according to this temperature correction and control brightness.
Explanation is used the basic display method of the image display device 1 with this structure.
Controller LSI40 sequentially sends picture signal corresponding to the pixel portion of a horizontal line with clock signal synchronization ground to the first source electrode driver 13a.Because the first to the 4th source electrode driver 13a is connected as shown in fig. 1 to 13d, remained on provisionally the first to the 4th source electrode driver 13a corresponding to the picture signal of the pixel portion of a horizontal line in 13d by the clock signal pulse corresponding to the pixel portion of this horizontal line.When controller LSI40 when being in the first to the 4th source electrode driver 13a under this state to 13d output locking pulse signal, each in the 13d of the first to the 4th source electrode driver 13a is to corresponding to the source voltage line output of the pixel portion of this horizontal line demonstration voltage level corresponding to the picture signal of corresponding pixel portion.
Controller LSI40 also the to first to the 4th gate drivers 14a to 14d output enable signal (enable signal), enabling pulse (start pulse) signal and the vertical shift clock signal as control signal.When enable signal was the LOW level, the grid voltage line was in the OFF state.When start dialing signal by in the input of the rising edge of vertical shift clock signal, and enable signal is when being set to the HIGH level, the primary grid voltage line of corresponding gate drivers is set to the ON state.When start dialing signal is not when the rising edge of vertical shift clock signal is transfused to, the grid voltage line that and then is set to the grid voltage line of ON state in the back to back previous moment is set to the ON state.
By a grid voltage line is set to the ON state, to the demonstration voltage of source voltage line output corresponding to the pixel portion of a horizontal line, the TFT12b that is connected in this grid voltage line (corresponding to the pixel portion of a horizontal line) is set to the ON state simultaneously.In this way, electric power (demonstration voltage) is provided for each the pixel electrode 12a corresponding to the pixel of a horizontal line from corresponding source voltage line.Therefore, change has occured in the state of corresponding display element 11a, and carries out image shows.For each horizontal line repeats this demonstration control, thus and carries out image demonstration on whole display screen.
Below, illustrate according to image display device 1 of the present invention and method for displaying image by concrete example 1 to 8.In example 1 to 8, used the image display device that comprises controller LSI 40 described above.
(example 1)
In example 1 of the present invention, by the summation to the time integral value (or voltage) of the brightness in the first and second period of sub-frame, be that each the pixel portion carries out image on the screen shows.In by the one-period in uniquely defined the first and second period of sub-frame (for example, the first period of sub-frame), the picture signal of maximum gray scale is provided, or provides gray level according to received image signal to increase or the picture signal of the gray level that reduces.This period of sub-frame is called as " period of sub-frame α ".In another period of sub-frame (for example, the second period of sub-frame), the picture signal of minimal gray level is provided, or provides gray level according to received image signal to increase or the picture signal of the gray level that reduces.This period of sub-frame is called as " period of sub-frame β ".This control is carried out take single pixel as unit, or carries out take the pixel of defined amount as unit.
The below will illustrate how to confirm is to which period of sub-frame among the first period of sub-frame and the second period of sub-frame distribution period of sub-frame α and the period of sub-frame β.
In example 1, display board 10 uses the liquid crystal material of the high temperature correlativity with response speed as display element.
Fig. 2 is that controller LSI 40 in the example 1 is (as display control section; Shown in Figure 1) the calcspar of structure.In example 1, represent controller LSI 40 with reference number 40A.
As shown in Figure 2, controller LSI 40A comprises line buffer 41 (row data memory portion), timing controller 42 (timing controlled part), frame memory data selector 43 (frame memory data selection part), the first gradation conversion circuit 44 (the first gradation conversion part), the second gradation conversion circuit 45 (the second gradation conversion part) and output data selector 46 (output data selection part).
Line buffer 41 receives received image signal line by line, and the picture signal of interim storage input.Line buffer 41 comprises receiving port and the transmit port that is independent of each other, and therefore can receive simultaneously and transmitted signal.
Timing controller 42 control frame memory data selector switchs 43, so as alternately to select to the data transmission of frame memory 30 and from frame memory 30 read data.Timing controller 42 is also controlled output data selector 46, in order to alternately select the data output from the first gradation conversion circuit 44, or exports from the data of the second gradation conversion circuit 45.That is, describe in detail as following, timing controller 42 is that output data selector 46 is selected the first period of sub-frame or the second period of sub-frame.
By timing controller 42 control frame memory data selector switchs 43, in order to alternately select data transmission or data to read.In data transmission, 43 1 horizontal line of frame memory data selector connect a horizontal line ground and transmit the received image signal that is stored in the line buffer 41 to frame memory 30.In data read, frame memory data selector 43 read line by line the previous frame period and reads and be stored in received image signal in the frame memory 30, and with the data transmission that reads to the second gradation conversion circuit 45.
The grey level transition of the received image signal that the first gradation conversion circuit 44 will provide from line buffer 41 becomes maximum gray scale, or the gray level that increases or reduce according to the gray level of received image signal.
The grey level transition of the picture signal that the second gradation conversion circuit 45 will provide from frame data selector switch 43 becomes the minimal gray level, or the gray level that increases or reduce according to the gray level of received image signal.
The first gradation conversion circuit 44 and the second gradation conversion circuit 45 have the function that changes conversion value according to the temperature levels signal from temperature sensor IC 20 outputs.In example 1, the first gradation conversion circuit 44 comprises the look-up table that stores the output valve corresponding with input value with the second gradation conversion circuit 45.Alternately, can calculate output valve by counting circuit.
Output data selector 46 is by timing controller 42 control, so that alternately a horizontal line connects a horizontal line ground and selects from the picture signal of the first gradation conversion circuit 44 outputs, or from the picture signal of the second gradation conversion circuit 45 outputs.Output data selector 46 with selected picture signal as the panel image signal output.
The below will comprise the operation of the image display device of the controller LSI 40A with said structure in the case illustrated 1.
Fig. 3 is the sequential chart of the signal in the image display device of the example 1 that provides with horizontal cycle.In Fig. 3, be the first horizontal line to the three horizontal line received image signals of N frame.
In Fig. 3, at bracket
Figure G2009101605373D00741
Interior letter representation frame and horizontal line are transfused to the picture signal that is transmitted in this frame and horizontal line.For example, [f, 1] picture signal of being illustrated in input in first horizontal line of f frame will be transmitted.[N, 2] are illustrated in the picture signal of inputting in second horizontal line of N frame and will be transmitted.M is capable to be horizontal line middle on the screen.In example 1, M is capable to be the horizontal line that is driven by the primary grid voltage line of the 3rd gate drivers 14c." C1 " expression will transmit the picture signal that is obtained by 44 pairs of received image signal conversions of the first gradation conversion circuit, this received image signal be subsequently followed by bracket
Figure G2009101605373D00742
In input in the frame that illustrates and the horizontal line." C2 " expression will transmit the picture signal that is obtained by 45 pairs of received image signal conversions of the second gradation conversion circuit, this received image signal be subsequently followed by bracket
Figure G2009101605373D00743
In input in the frame that illustrates and the horizontal line.
In operation, represent such as arrow D1 among Fig. 3, at first receive received image signal by line buffer 41.
Then, D2 represents such as arrow, when receiving a horizontal line of picture signal, this picture signal is write frame memory 30 by frame memory data selector 43 from line buffer 41, and is sent to the first gradation conversion circuit 44 from line buffer 41.Picture signal after the first gradation conversion circuit 44 will be changed is as the panel image signal output.
As represented by arrow D3, horizontal line connects a horizontal line ground, with the picture signal that is written into frame memory 30 ground that alternates, picture signal with horizontal line, that is, with the half frame cycle before the horizontal line of the picture signal that is written into, from frame memory 30, read.Change the picture signal that reads by the second gradation conversion circuit 44 by frame memory data selector 43, and as the panel image signal output.
A horizontal line of panel picture signal is exported from controller LSI 40A, and is sent to the first to the 4th source electrode driver 13a to 13d by a clock signal.Then, when the locking pulse signal is provided, corresponding to the demonstration voltage of the display brightness of each pixel portion by from corresponding source voltage line output.In this, when needed, vertical shift clock signal or grid start dialing signal are provided for the gate drivers corresponding to horizontal line, will on the source voltage line of described gate drivers, provide electric power (demonstration voltage) so that carries out image shows.Therefore, the sweep signal on the corresponding grid voltage line is placed in the ON state.For the gate drivers that is not used to the image demonstration, enable signal is placed in the LOW level, and the sweep signal of therefore corresponding grid voltage line is placed in the OFF state.
In the example shown in Fig. 3, as being represented that by arrow D4 the M of the picture signal of (N-1) frame capable (horizontal line) is sent to source electrode driver.Then, D5 represents such as arrow, is placed in the HIGH level from the enable signal of controller LSI 40A to the three gate drivers 14c.Represent that such as arrow D6 and D7 start dialing signal and vertical shift clock signal are provided on the 3rd gate drivers 14c.As a result, D8 represents such as arrow, and the TFT 12b (with regard to display position, capable corresponding to the M on the screen) that is connected in the primary grid voltage line of the 3rd gate drivers 14c is placed in the ON state.Thereby carries out image shows.In this, the enable signal of first, second on display position and the 4th gate drivers 14a, 14b and 14d is not set to the LOW level, and the TFT 12b that is connected in first, second and the 4th gate drivers 14a, 14b and 14d is in the OFF state.
Next, shown in arrow D9, the first row of the picture signal of N frame (horizontal line) is sent to source electrode driver.Then, D10 represents such as arrow, and the enable signal from controller LSI 40A to first grid driver 14a is set to the HIGH level.Represent that such as arrow D10 and D11 start dialing signal and vertical shift clock signal are provided for first grid driver 14a.As a result, shown in arrow D13, the TFT12b (with regard to display position, corresponding to the first row on the screen) that is connected in the primary grid voltage line of first grid driver 14a is set to the ON state.Thereby carries out image shows.In this, the second to the 4th gate drivers 14b, the 14c on display position and the enable signal of 14d are not set to the LOW level, and the TFT12b that is connected in the second to the 4th gate drivers 14b, 14c and 14d is in the OFF state.
Fig. 4 shows and how to control by repeating the demonstration shown in Fig. 3, rewrites the picture signal on the screen.Especially, how Fig. 4 shows in the time durations that the picture signal at N frame and (N+1) frame is transfused to and rewrites picture signal.
In Fig. 4, the upright position that a horizontal line of oblique arrow presentation video signal is rewritten and timing.Ci[f] represent to show the picture signal of f frame with the picture signal that conversion was obtained by I gradation conversion circuit (first gradation conversion circuit 44 or second gradation conversion circuit 45) execution.Image display information is retained, until be rewritten with the picture signal of delegation.In Fig. 4, the position that white region representation is such, the image display information that the conversion of being carried out by the first gradation conversion circuit 44 in this position obtains is retained, and the shadow region represents such position, and the image display information that the conversion of being carried out by the second gradation conversion circuit 45 in this position obtains is retained.Dotted line represents that driven the first to the 4th driver 14a is to the boundary line of 14d.
Note the upright position of a horizontal line on the screen, be understood that during half frame in, show with the picture signal carries out image that conversion was obtained of being undertaken by the first gradation conversion circuit 44; And in during the lower half frame of this frame, show with the picture signal carries out image that conversion was obtained of being undertaken by the second gradation conversion circuit 45; First half frame of this frame is called as the first period of sub-frame, and second half frame of this frame is called as the second period of sub-frame.
Response speed characteristic by the brightness transition of employed display board is determined period of sub-frame α is distributed to the first period of sub-frame or the second period of sub-frame, and is that period of sub-frame β is distributed to the first period of sub-frame or the second period of sub-frame.
In the situation of the display board that uses in example 1, the response speed of the brightness transition from the minimum brightness level to the maximum brightness level is low (that is, long to the response time of this brightness transition), and this response can not be finished in a period of sub-frame.On the contrary, the response speed of the brightness transition from the maximum brightness level to the minimum brightness level is high, and this luminosity response can be finished in a period of sub-frame basically.
Use this display board, when the gray level of received image signal changed as shown in Figure 5 like that, period of sub-frame α was assigned to the first period of sub-frame, and period of sub-frame β is assigned to the second period of sub-frame.The brightness that Fig. 6 shows in this case changes.
In Fig. 6, D37-1 represents such as arrow, and when the level of received image signal significantly rose, gray level changed in the first period of sub-frame sharp.As mentioned above, for employed display board in the example 1, the response speed of the brightness transition from the minimum brightness level to the maximum brightness level is low, and therefore luminosity response can not be finished in a period of sub-frame.Therefore, in the ending of the first period of sub-frame that is represented by arrow D37-2, luminosity response is not finished fully.As a result, the state of brightness change changes not identical with the brightness of the back to back subsequent frame of the gray level with identical received image signal.This has caused following inconvenience in the image of reality: produced false profile at the edge of mobile object; Perhaps in the situation of color monitor, destroy the color balance between the different colours, and unusual color occurred.
Then, in the situation that the gray level of input picture changes as shown in Figure 5, period of sub-frame α is assigned to the second period of sub-frame, and period of sub-frame β is assigned to the first period of sub-frame.The display brightness that Fig. 7 shows in this case changes.
In Fig. 7, D38-1 represents such as arrow, and when the voltage of received image signal significantly descended, gray level changed in the first period of sub-frame sharp.As mentioned above, for employed display board in the example 1, the response speed of the brightness transition from the minimum brightness level to the maximum brightness level is high, and has therefore basically finished luminosity response in a period of sub-frame.Therefore, in the ending of the first period of sub-frame that is represented by arrow D38-2, finished fully luminosity response.As a result, the state of brightness change is identical with the state that the brightness of the back to back subsequent frame of the gray level with identical received image signal changes.Therefore, can not appear at the inconvenience that the edge of mobile object produces false profile, or in the situation of color monitor, the color balance between different color can be not destroyed, and abnormal color can not occur.For this reason, in example 1, period of sub-frame α is assigned to the second period of sub-frame, and period of sub-frame β is assigned to the first period of sub-frame.
Explanation is used the method for displaying image of the image display device execution in the example 1.
In example 1, as mentioned above, the second period of sub-frame is called as the α period of sub-frame.In the α period of sub-frame, changed by 44 pairs of received image signals of the first grey level transition circuit, thereby when the gray level of received image signal is equal to or less than a well-determined threshold level, the picture signal of the gray level that provides gray level according to received image signal to increase or reduce, and when the gray level of received image signal during greater than this threshold level, provide the picture signal of maximum gray scale.
The first period of sub-frame is called as the β period of sub-frame as mentioned above.In period of sub-frame β, changed by 45 pairs of received image signals of the second grey level transition circuit, thereby when the gray level of received image signal is equal to or less than well-determined threshold level, the picture signal of minimal gray level is provided, and when the gray level of received image signal during greater than this threshold level, provide gray level according to received image signal to increase or the picture signal of the gray level that reduces.
The intensity level of the desired value that is used for the first period of sub-frame and the second period of sub-frame will be described herein.
Fig. 8 has provided the target brightness levels in the example 1.
In Fig. 8, left part shows the intensity level that is assumed to be for received image signal.Center section shows the interior display brightness of each period of sub-frame in the first period of sub-frame and the second period of sub-frame.Right part shows the interior time integral brightness of two period of sub-frame in a frame period.This value be considered to beholder's eyes actual perceived to brightness be complementary.The probable value of the maximum that herein, can obtain by the time integral to the brightness of display board 10 is set to 100%.Fig. 8 shows and has considered 0%, 25%, 50%, 75% and 100% gamma light characteristic, is assumed to be the intensity level for received image signal.
In Fig. 8, the intensity level that is assumed to be for the received image signal of 1/2 (50%) high-high brightness is set to the threshold level, and it is the reference of the intensity level of the picture signal that provides in each period of sub-frame.When the intensity level that is used for received image signal of hypothesis be high-high brightness 1/2 (50%) or more hour, the brightness in the second period of sub-frame is by with following expression.
Brightness for received image signal of brightness in the second period of sub-frame=be assumed to be * 2 (ratio of appointment, that is, and multiple value: 2).
Therefore, the brightness in the second period of sub-frame increases or reduces according to being assumed to be brightness for received image signal.For example, when the brightness that is used for received image signal when hypothesis was 25%, then the brightness in the second period of sub-frame was 25% * 2=50%.
The brightness that is used for received image signal when hypothesis greater than high-high brightness 1/2 (50%) time, the brightness in the second period of sub-frame is high-high brightness (100%).
The brightness that is used for received image signal when hypothesis be high-high brightness 1/2 (50%) or more hour, the brightness in the first period of sub-frame is minimum brightness (0%).
The brightness that is used for received image signal when hypothesis greater than high-high brightness 1/2 (50%) time, the brightness in the first period of sub-frame is expressed as following form.
Brightness * 2-1 for received image signal of brightness in the first period of sub-frame=suppose (ratio of appointment, that is, and multiple value: 2).
Therefore, the brightness in the first period of sub-frame is increased or decreased according to the brightness that hypothesis is used for received image signal.For example, when the brightness that is used for received image signal when hypothesis was 75% (3/4), the brightness in the first period of sub-frame was (3/4) 2-1=50%.
As mentioned above, according to the intensity level of setting, by the first gradation conversion circuit 44 (in the first period of sub-frame) and by the second gradation conversion circuit 45 (in the second period of sub-frame) gray level of received image signal is changed, and the value after the conversion is exported in the first period of sub-frame and the second period of sub-frame respectively.By this way, the gray scale of display brightness center does not in time rely on the gray level of received image signal, and is fixed to the second period of sub-frame.Therefore, for example can suppress the technical matters by the decline of unusual brightness or the uneven picture quality that produces of color among the open No.2001-296841 of Japan's special permission.
Current general picture signal, for example, TV broadcast singal, video dubbing signal and PC (personal computer) picture signal are to have considered the gamma light characteristic of CRT (cathode-ray tube (CRT)) and be produced and export mostly.In this case, the gray level of image display signal and hypothesis do not have linear relationship for the display brightness of this gray level.Therefore, for with display device, realize that such as liquid crystal indicator and EL display device correct gray scale represents that source electrode driver generally includes a circuit, this circuit has the gamma light characteristic substantially the same with the gamma light characteristic of CRT, is used for picture signal is converted to source voltage.
In example 1, the display brightness that the gray level of received image signal and hypothesis are used for this gray level has following relation.
Display brightness=(gray level/maximum gray scale of received image signal) γ(γ=2.2)
Expression formula (1)
(wherein the maximal value of display brightness is " 1 ", and the minimum value of display brightness is " 0 ").
In example 1, the source electrode driver 13a of display board 10 is designed to have the gamma light characteristic identical with expression formula (1) to 13d.Do like this, thereby when a frame of received image signal is copied within a frame period simply, for example, in the handset kind display device of common routine, the relation that the gray level of received image signal and hypothesis are used between the display brightness of this gray level can be replicated.In this case, the gray level of received image signal and hypothesis have the relation shown in Figure 54 for the display brightness of this gray level.
Even in the situation of the frame that carries out image shows in two period of sub-frame in such as example 1, gray level and the hypothesis that can copy received image signal also are preferable for the relation between the display brightness of this gray level.
In order to achieve this end, in example 1, (a) is set as the threshold level of the reference of the gray level of the picture signal in each period of sub-frame, (b) increased according to the gray level of received image signal or reduce after the gray level of the picture signal that in each period of sub-frame, provides, thereby the relation between the time integral value of the brightness in the gray level of received image signal and frame period presents correct gamma light characteristic.
In example 1, provide a right of priority in order to suppress reducing of brightness, rather than solve the motion blur problems of all gray levels.When the gray level of received image signal when being maximum, with possible the brightness carries out image demonstration of the maximum of display board 10.
In this case, the gray level that provides in the gray level that provides in the gray level of received image signal and the first period of sub-frame and the second period of sub-frame has following relation.
(gray level/maximum gray scale of received image signal) γ={ (gray level/maximum gray scale that in the first period of sub-frame, provides) γ+ (gray level/maximum gray scale that in the second period of sub-frame, provides) γ}/2
(γ＝2，2)
Expression formula (2)
Relation between the gray level that provides in the gray level that provides in the gray level of the received image signal that satisfies expression formula (2) and the first period of sub-frame and the second period of sub-frame is provided Fig. 9.
In Fig. 9, left part shows the gray level of received image signal.Center section shows after the gray level of received image signal having been carried out conversion, the gray level that provides in each period of sub-frame in the first period of sub-frame and the second period of sub-frame.Right part shows the time integral value of the interior brightness of two interior period of sub-frame of a frame period.Fig. 9 shows 0%, 25%, 50%, 75% and 100% brightness time integral value.
As shown in Figure 9, suppose the brightness for the received image signal of 1/2 (50%) high-high brightness, that is, 72.97% of the gray level of received image signal is set to the threshold level, and it is the reference for the gray level of the picture signal that provides in each period of sub-frame.When the gray level of received image signal is 72.97% or more hour, the gray level of the picture signal that provides in the second period of sub-frame is used for this received image signal according to hypothesis brightness increases or reduces, in order to satisfy expression formula (2).The gray level of the picture signal that provides in the first period of sub-frame is minimum (0%).
When the gray level of received image signal greater than 72.97% the time, the gray level of the picture signal that provides in the second period of sub-frame is maximum (100%).The gray level of the picture signal that provides in the first period of sub-frame is used for the brightness increase of this received image signal or is reduced according to hypothesis, in order to satisfy expression formula (2).
As be stored in the line buffer 41 temporarily, and output is from line buffer 41, and in controller LSI 40A, by the result of the first gradation conversion circuit 44 to its received image signal of changing, obtain the gray level of the picture signal in the first period of sub-frame, provide.As be stored in the frame memory 30 temporarily, and output is from frame memory 30, and in controller LSI 40A, by the result of the second gradation conversion circuit 45 to its received image signal of changing, obtain the gray level of the picture signal in the second period of sub-frame, provide.
When the gray level after the conversion shown in the middle part that Fig. 9 is provided, in the first and second period of sub-frame, with according to display board 10 source electrode driver was had, and by the gamma light characteristic of the expression formula shown in Figure 54 (1) expression, carries out image shows.
As a result, the first period of sub-frame in the frame period shown in Fig. 9 right part and the viewed person's of time integral brightness in the second period of sub-frame eyes perceive as brightness.This time integral brightness has copied by expression formula (1) expression, and the gamma light characteristic that is assumed to be for received image signal shown in Figure 54.Should be appreciated that by the image display device in the example 1 and method for displaying image and copied correct gamma light characteristic.
In order to use image display device and the method in the example 1, demonstration is with the static background image of mobile object in the horizontal direction, when the gray level of received image signal is enough hanged down, in the second period of sub-frame, provide the image of minimal gray level for the display part of the display part of static background and mobile object.Therefore, as in the situation of the image display device that adopts minimum (brightness) insertion system shown in Figure 50 and 51, alleviated mobile fuzzy, thereby improved the quality of moving images.
In the following description, take static background with high brightness more and mobile, have height as 72.97% or the image of the object of higher gray level (50% or higher display brightness) be imported into the image display device of the handset kind of common routine, and also be input to the image display device in the example 1.
Figure 56 shows when above-mentioned image is imported into normal conventional handset kind image display device, the brightness that changes according to time of a horizontal line on the screen.In Figure 56, similar with Figure 48, each frame period T101 is one fully photoperiod T102.The first period of sub-frame neither is provided, the second period of sub-frame is not provided yet.Figure 57 shows the distribution of the brightness of the image shown in Figure 56 that the beholder's who is noting mobile object eyes watch.
Figure 58 shows when above-mentioned image is imported in the image display device in the example 1, the brightness that changes according to time of a horizontal line on the screen.
As shown in Figure 58, each frame period T101 comprises two period of sub-frame T201 (the first period of sub-frame) and T202 (the second period of sub-frame).Because the gray level of the gray level of mobile object and static background all is higher than 72.97%, second period of sub-frame (A2) of mobile object and second period of sub-frame (B2) of static background are shown with high-high brightness.First period of sub-frame (A1) of mobile object and first period of sub-frame (B1) of static background are shown with different intensity levels.Figure 59 shows the distribution of the brightness of the image shown in the Figure 58 that is watched by the beholder's who is noting mobile object eyes.Should be appreciated that with the situation of the display device (Figure 57) of normal conventional handset kind and compare that mobile fuzzy has been alleviated.As will be appreciated, in example 1, maximum (brightness) insertion method provides improvement with the different principle of operation of principle of operation with minimum (brightness) insertion system.
Figure 10 shows when object flatly moves in the image display device in example 1 with static background, changes according to the brightness of time of a horizontal line on the screen.In the example 7 of the open publication number 2001-296841 of Japan's special permission, the movement (Figure 52 and 53) of object with the static background level has been described.
In Figure 10, transverse axis represents the luminance state (pixel portion position in the horizontal direction) on the horizontal direction of screen, and Z-axis represents the time.Figure 10 has provided the image that is presented on the screen in 3 frames.
In Figure 10, each frame period T101 comprises two period of sub-frame T201 (the first period of sub-frame) and T202 (the second period of sub-frame).For the display part B of static background, the gray level of received image signal is low.Therefore, in the first period of sub-frame T201, when 0% minimum brightness, display part B is in without light state.In the second period of sub-frame T202, display part B increases with the gray level according to received image signal when 40% brightness or the picture signal of the gray level that reduces is in light state is arranged.
For the display part A of mobile object, the gray level of received image signal is higher than the threshold value of regulation.Therefore, in the first period of sub-frame T201, display part A increases with the gray level according to received image signal with 20% brightness or the image of the gray level that reduces is in light state is arranged.In the second period of sub-frame T202, display part A is in 100% high-high brightness light state.With the numeral of " % " gradation of image with respect to 100% maximum display capabilities.For example, for the brightness by the circumjacent numeral 0% of dotted line of B1.
Figure 11 shows the distribution of the brightness of the image shown in Figure 10 that the beholder's who is noting mobile object eyes watch.
Figure 11 is illustrated between the left end and right-hand member of the mobile object that is represented by broken circle, and the shape of the line that expression brightness changes is different.Yet, the shortcoming shown in Figure 53, that is, the part that existence and original image are brighter or darker has been alleviated.
Below, with the temperature correction function of the image display device in the case illustrated 1.
Image display device in the example 1 uses liquid crystal cell as the display element of display board 10.The response speed that generally is well known that liquid crystal material is lower when lower temperature, and is higher when higher temperature.Under certain temperature conditions, the response speed of the raising transmittance that changes with respect to gray level may be different from the response speed that reduces transmittance that changes with respect to gray level.The difference of this response speed according to temperature, and which response speed (that is, increasing or reduce the response speed of transmittance) is higher, depends on the use state of liquid crystal material.
In the situation of the liquid crystal material that uses in example 1, when temperature was high, the response speed that increases transmittance was identical with the response speed that reduces transmittance basically, and when temperature reduces, reduces the response speed step-down of transmittance.With this liquid crystal material, even be provided for the time integral brightness of using two period of sub-frame when carrying out the image display device that a two field picture shows when the same gray level of picture signal, under some temperature conditions, brightness also can be different.
When the gray level that Figure 12 shows in being provided for example 1 picture signal of the display board 10 that uses is not regulated according to temperature conditions, according to the difference of the brightness of temperature conditions.Left part shows the response speed of liquid crystal material when high temperature, and right part shows liquid crystal material response speed at low temperatures.Thick line represents gray level.In high temperature and low temperature situation, the same gray level of received image signal.The shadow region represents the brightness that the response speed according to liquid crystal material changes.
As mentioned above, in the situation of the liquid crystal material that in example 1, uses, when temperature reduces, reduce the response speed decline (that is, brightness descends) of transmittance.Therefore, under the low temperature condition shown in Figure 12 right part, and compare under the high-temperature condition shown in the left part of Figure 12, brightness is not reduced fully in the first period of sub-frame.As a result, the brightness of time integral has increased.Therefore, even the identical gray level of received image signal is provided under high temperature and low temperature condition, the brightness that beholder's eyes perceive also is different.For image display device, depend on temperature conditions, the brightness that beholder's eyes perceive is not both worthless.In order to address this problem, the image display device in the example 1 has temperature correction function as described below.
Be imported into the first gradation conversion circuit 44 and the second gradation conversion circuit 45 from the temperature levels signal that is provided near temperature sensor IC 20 outputs the display board 10.As mentioned above, the first gradation conversion circuit 44 and the second gradation conversion circuit 45 comprise look-up table.More specifically, each in the first gradation conversion circuit 44 and the second gradation conversion circuit 45 comprises a plurality of look-up tables, and according to the look-up table that is used for gradation conversion from the temperature levels signal conversion of temperature sensor IC20.
Figure 13 shows when the gray level of the picture signal that is provided for example 1 employed display board 10 is adjusted according to temperature conditions, according to the difference of the brightness of temperature conditions.Left part shows the response speed of liquid crystal material under the high temperature, and right part shows the response speed of liquid crystal under the low temperature.Thick line represents gray level.The shadow region represents the brightness that the response according to liquid crystal material changes.
Because temperature correction function described above, under the low temperature shown in the right part of Figure 13, and to compare under the high temperature shown in the left part of Figure 13, the lower gray level of picture signal is transfused to.Therefore, so that equated with brightness change under the high-temperature condition in brightness change that the delay of the response speed under the low temperature condition produces by liquid crystal material.By this way, with respect to the same gray level of picture signal, the brightness that is perceived by beholder's eyes can be held, and no matter what kind of temperature conditions is.
As mentioned above, according to example 1 of the present invention, when showing the object that moves with static background, alleviated mobile fuzzy, simultaneously only with the maximal value of time integral brightness, be that the brightness that beholder's eyes perceive has reduced 25%, and can not produce and compare brighter or darker singularly part with original image.Therefore, can improve the quality of the moving images of handset kind image display device.In addition, can represent to show image with the gray scale with the gamma light characteristic that is suitable for received image signal.Even when display board 10 uses liquid crystal material, also can keep the relation between the brightness that the gray level of received image signal and beholder's eyes perceive, no matter and what kind of temperature conditions is.
(example 2)
In example 2 of the present invention, by in first subframe and the second period of sub-frame in each frame period, to the time integral value summation of brightness, carry out the demonstration of a two field picture.Image display device in the example 2 comprises display control section, is used in two period of sub-frame the image displaying part carries out image being shown control.
One in described two period of sub-frame is called as period of sub-frame α, and another period of sub-frame is called as period of sub-frame β.Define threshold level T1 and the T2 of the gray level in described two period of sub-frame.Threshold level T2 is greater than threshold level T1.
When the gray level of received image signal is equal to or less than threshold level T1, increase or the picture signal of the gray level that reduces is offered the image displaying part of image display device in period of sub-frame α according to the gray level of received image signal, and the picture signal of minimal gray level is offered image displaying part at period of sub-frame β.
When the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, increase or the picture signal of the gray level that reduces is offered the image displaying part of image display device in period of sub-frame α according to the gray level of received image signal, and increase or reduce according to the gray level of received image signal, and the picture signal that the gray level of the gray level that provides in the period of sub-frame α is provided is offered image displaying part at period of sub-frame β.
When the gray level of received image signal during greater than threshold level T2, the picture signal of maximum gray scale is offered image displaying part at period of sub-frame α, and increases or the picture signal of the gray level that reduces is offered image displaying part at period of sub-frame β according to the gray level of received image signal.
For example, supposed that the brightness that is used for received image signal is changed as shown in figure 14 gradually.Figure 15 shows when the object with the brightness shown in Figure 14 flatly moves in the image display device of static background in example 1, changes according to the brightness of the time on the horizontal line on the screen.In example 1, the brightness in the first period of sub-frame (T201) is fixed to 0%, reaches 50% until hypothesis is used for the brightness of received image signal.The brightness that is used for received image signal when hypothesis surpasses after 50%, and the brightness in the first period of sub-frame increases according to the brightness that hypothesis is used for received image signal.Brightness in the second period of sub-frame (T202) increases according to the brightness that hypothesis is used for received image signal, reaches 50% until hypothesis is used for the brightness of received image signal.The brightness that is used for received image signal in hypothesis surpasses after 50%, and the brightness in the second period of sub-frame is fixed to 100%.
Figure 16 shows the distribution of the brightness aspect of the image shown in the Figure 15 that is observed by the observer's who notes Moving Objects eyes.
As shown in Figure 16, discontinuous (the with dashed lines circle is represented) to appear at should be during level and smooth brightness changes.This discontinuous eyes that perhaps can the observed person are regarded profile of unusual part such as falseness etc. as.
In example 2, in order to suppress this trouble, with from example 1 in different mode realize intensity profile in the first and second period of sub-frame.Figure 17 has illustrated the target brightness levels in the example 2.
In example 2, threshold level T1 is defined as works as the gray level of the brightness of supposing when being 25%, and threshold level T2 is defined as works as the gray level of the brightness of supposing when being 75%.When being assumed to be that brightness for received image signal is equal to or less than threshold level T1 (25%), in the first period of sub-frame (period of sub-frame β), realize that in minimum brightness level 0% image shows, and in the second period of sub-frame (period of sub-frame α), realize that in the intensity level that is increased according to the gray level of received image signal or reduces image shows.
When being assumed to be brightness for received image signal greater than threshold level T1 (25%) and being equal to or less than threshold level T2 (75%), intensity level 0% to 50% in the first period of sub-frame (period of sub-frame β) realizes that image shows, and the intensity level 50% to 100% realizes that image shows in the second period of sub-frame (period of sub-frame α).Determine intensity level among the period of sub-frame β and the intensity level among the period of sub-frame α according to the gray level of received image signal, and the difference between the intensity level of period of sub-frame β and period of sub-frame α is maintained 50%.About the relation between period of sub-frame β and the period of sub-frame α, can fix its intensity level, poor between the gray level that provides can be provided, the ratio of the gray level that provides perhaps can be provided.Can with the intensity level of certain functions specify period of sub-frame β and period of sub-frame α or be provided at period of sub-frame α and period of sub-frame β in gray level.
When being assumed to be that brightness for received image signal is greater than threshold level T2 (75%), in the first period of sub-frame (period of sub-frame β), realize that in the intensity level that is increased according to the gray level of received image signal or reduces image shows, and in the second period of sub-frame (period of sub-frame α), realize that in maximum brightness level 100% image shows.
In example 1, when being assumed to be that brightness for received image signal is to be equal to or greater than 25% and less than 75% the time, each the target display brightness level that is used for the first period of sub-frame and the second period of sub-frame is little by little increased to the first period of sub-frame from the second period of sub-frame.On the contrary, in example 2, the target display brightness all has been increased in the second period of sub-frame and the first period of sub-frame.When being assumed to be for the brightness of received image signal less than 25 or when being equal to, or greater than 75%, example 2 with example 1 in identical mode work.
As mentioned above, Figure 17 has illustrated the target brightness levels in the example 2.Figure 17 is compared with Fig. 8 of target brightness levels during example 1 has been described, be appreciated that and work as, for example, be assumed to be that the display brightness level in the first period of sub-frame and the second period of sub-frame was different when brightness for received image signal was 50% between example 1 and example 2.In example 1, the target display brightness is added to 100% in the second period of sub-frame, and then increases since 0% in the first period of sub-frame.On the contrary, in example 2, the target display brightness is added to 100% and be added to 50% from 0% the first period of sub-frame from 50% in the second period of sub-frame.
Next, will describe when being assumed to be that brightness for received image signal is equal to or greater than 25% and be provided at the gray level of each period of sub-frame less than 75% the time in order to keep above-described target display brightness.
In example 2, with the same in the example 1, display board has a kind of gamma light characteristic.Received image signal also has the gamma light characteristic of a kind of CRT of considering.For the difference between the intensity level of the intensity level of the first period of sub-frame and the second period of sub-frame is maintained 50%, the relation between the gray level of the gray level of the first period of sub-frame and the second period of sub-frame can be expressed as follows.
(gray level/maximum gray scale of the second period of sub-frame) γ-(gray level/maximum gray scale of the first period of sub-frame) γ=0.5 (γ=2.2) expression formulas (3)
Identical about the relation of the gray level of received image signal and the expression formula (2) described in the example 1.Based on these expression formulas, Figure 18 show received image signal gray level, be provided at the relation between the brightness that gray level in the first period of sub-frame and the second period of sub-frame and time integral brightness namely felt by observer's eyes.In example 1, Fig. 9 illustrated received image signal gray level, be provided at the relation between the brightness that gray level in the first period of sub-frame and the second period of sub-frame and time integral brightness namely felt by observer's eyes.Relatively Figure 18 and Fig. 9, when time integral brightness in example 2 be in example 1 50% the time, be provided at the gray level in the first period of sub-frame and the difference that is provided between the gray level in the second period of sub-frame smaller.
Figure 19 show when an object with the brightness that changes gradually as shown in Figure 14 during along with the static background horizontal ground motion in the image display device in the example 2 brightness according to time of a horizontal line in the screen change.40%) and the part B3 (brightness that is assumed to be: 60%) notes the part B2 (brightness that is assumed to be:, be appreciated that, different among Figure 15 (example 1), the difference between the brightness among the first period of sub-frame T201 and the second period of sub-frame T292 is 50%.
Figure 20 shows the distribution of the brightness aspect of the image shown in the Figure 19 that is observed by the observer's who notes Moving Objects eyes.Be appreciated that discontinuous disappearance the (the with dashed lines circle is represented in such as Figure 20) aspect brightness changes (the with dashed lines circle is represented in such as Figure 16).
As mentioned above, except the effect that example 1 provides, even example 2 of the present invention provides when an object horizontal ground motion that has as shown in Figure 14 the brightness that little by little a changes when static background is shown simultaneously, also can avoid the observer to see the effect of the discontinuous phenomenon aspect the brightness change.
(example 3)
In example 3 of the present invention, by seeking time integrated luminosity value during the first and second period of sub-frame and, realize that the image of a frame shows.In example 3, image display device comprises display control section, and it is used for realizing that an image displaying part image shows control in two period of sub-frame in a frame period.
One in two period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β.Be defined in threshold level T1 and the T2 of two gray levels in the period of sub-frame.Threshold level T2 is greater than threshold level T1.Threshold level (value) L is determined by unique.
When the gray level of received image signal is equal to or less than threshold level T1, in period of sub-frame α, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to the image displaying part of image display device, and in period of sub-frame β, provide the picture signal of minimal gray level to image displaying part.
When the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, in period of sub-frame α, the picture signal of gray level L is provided to image displaying part, and in period of sub-frame β, provide the picture signal of the gray level that is increased according to the gray level of received image signal or reduces to image displaying part.
When the gray level of received image signal during greater than threshold level T2, in period of sub-frame α, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to image displaying part, and in period of sub-frame β, provide the picture signal of maximum gray scale to image displaying part.
In example 3, the brightness among the period of sub-frame α is higher than or is lower than brightness among the period of sub-frame β, is to change according to the gray level of received image signal.Therefore, from different in the example 1, being configured to the period of sub-frame of the first period of sub-frame and being configured to the period of sub-frame of the second period of sub-frame can not be by determining for the response time of the luminance transformation from the minimum brightness level to the maximum brightness level and for the relation between the response time of the luminance transformation from the maximum brightness level to the minimum brightness level.Which period of sub-frame is configured to the first period of sub-frame and which period of sub-frame and is configured to the second period of sub-frame, for example preferably determines according to the characteristic of other characteristic of display board or shown image.In this example, period of sub-frame β is configured to the first period of sub-frame, and period of sub-frame α is configured to the second period of sub-frame.
Figure 21 has illustrated the target brightness levels in the example 3.
In example 3, as shown in Figure 21, threshold level T1 is defined as the gray level when the brightness that is assumed to be is 25%, and threshold level T2 is defined as the gray level when the brightness that is assumed to be is 75%, and the gray level L of defined is defined as the gray level when the brightness that is assumed to be is 50%.
When being assumed to be that brightness for received image signal is equal to or less than threshold level T1, in the first period of sub-frame (period of sub-frame β), realize that in minimum brightness level 0% image shows, and in the second period of sub-frame (period of sub-frame α), realize that in the intensity level that is increased according to the gray level of received image signal or reduces image shows.
When being assumed to be brightness for received image signal greater than threshold level T1 (25%) and being equal to or less than threshold level T2 (75%), in the first period of sub-frame (period of sub-frame β), realize that in the intensity level corresponding to gray level L (50%) image shows, and in the second period of sub-frame (period of sub-frame α), realize that in the intensity level that is increased according to the gray level of received image signal or reduces image shows.
When being assumed to be that brightness for received image signal is greater than threshold level T2 (75%), realize that in the intensity level that is increased according to the gray level of received image signal or reduces image shows, and in the second period of sub-frame (period of sub-frame α), realize that in maximum brightness level 100% image shows.
Figure 22 shows the gray level that is provided at the picture signal in the first period of sub-frame and the second period of sub-frame, in order to realize above-described target display brightness.
In example 3, from different in the example 1, display board has with expression formula (1) represented gamma light characteristic, and received image signal is still considered and produced with the represented gamma light characteristic of expression formula (1).
Figure 23 show when an object during along with the static background horizontal ground motion in the image display device in the example 3 brightness according to time of a horizontal line in screen change.This object is along with the static background horizontal ground motion described in the example 7 of the open No.2001-296841 (Figure 52 and 53) of Japan's special permission.With the identical brightness of Figure 10 (example 1) on, show the part B of example 10 static backgrounds.Therefore consider the part A of Moving Objects, be assumed to be that the brightness for received image signal has surpassed 50%, and the intensity level in the second period of sub-frame (T202) is higher than intensity level in the first period of sub-frame (T201).
Figure 24 is the distribution except the brightness aspect of the image shown in the Figure 23 that is observed by the observer's who notes Moving Objects eyes.Be appreciated that discontinuous (the with dashed lines circle is represented among Figure 16) on brightness changes disappeared (the with dashed lines circle is represented among Figure 20).The shape that Figure 24 shows the point that this brightness of expression changes between such as the left end of the represented Moving Objects of with dashed lines circle and right-hand member is different.Yet, from different in the example 1, having reduced the shortcoming shown in Figure 53, this shortcoming is to have the part bright or darker than original image.
(example 4)
Image display device in the example 4 of the present invention has used has the response characteristic different from the display board in the example 1.For one in two period of sub-frame, the gray level that provides is provided a upper limit, in order to reduce motion blur.For for simplicity, this display board can also represent with reference number 10.
In the situation of employed display board, very low for the response speed of the luminance transformation from the maximum brightness level to the minimum brightness level in example 4 of the present invention, and can not in a period of sub-frame, finish this response.On the contrary, very high for the response speed of the luminance transformation from the minimum brightness level to the maximum brightness level, and in a period of sub-frame, realize in fact this response.Therefore, period of sub-frame α is configured to the first period of sub-frame, and period of sub-frame β is configured to the second period of sub-frame.
To the target brightness levels that be used for the first period of sub-frame and the second period of sub-frame in the example 4 be described.
Figure 25 has illustrated the target brightness levels in the example 4.
In Figure 25, left-hand component shows the brightness that is assumed to be for received image signal.Center section shows the display brightness in each of the first period of sub-frame and the second period of sub-frame.Right-hand component shows the time integral brightness in two period of sub-frame in a frame period.Consider this value, so that coupling is by the brightness of the actual institute of observer's eyes perception.The value of the maximum possible that the time integral of brightness that herein, can be by display board 10 obtains is set to 100%.Figure 25 shows the intensity level for received image signal of being assumed to be of considering 0%, 25%, 50%, 66.67%, 75% and 100% gamma light characteristic.
As shown in Figure 25, be assumed to be that the brightness for 2/3 (66.67%) received image signal of high-high brightness is set to a threshold level, this threshold level is a reference for the gray level of the picture signal that is provided at each period of sub-frame.When be assumed to be brightness for received image signal be high-high brightness 2/3 (66.67%) or still less the time, the brightness in the first period of sub-frame is expressed as follows.
Brightness for received image signal of brightness in the first period of sub-frame=be assumed to be * 1.5 (ratio of defined, i.e. multiples: 1.5).
Therefore, the brightness in the first period of sub-frame is to be increased for the brightness of received image signal or to reduce according to being assumed to be.For example, when being assumed to be that brightness for received image signal is 25%, the brightness in the first period of sub-frame is 25% * 1.5=37.5%.
When be assumed to be for the brightness of received image signal greater than high-high brightness 2/3 (66.67%) time, the brightness in the first period of sub-frame maximum (100%).This maximal value 100% is to multiply by 1.5 by threshold level 66.67% to obtain.
When be assumed to be brightness for received image signal be high-high brightness 2/3 (66.67%) or still less the time, the brightness in the second period of sub-frame minimum (0%).
When be assumed to be for the brightness of received image signal greater than high-high brightness 2/3 (66.67%) time, the brightness in the second period of sub-frame is expressed as follows.
Brightness in the second period of sub-frame=(being assumed to be the brightness-2/3 for received image signal) * 1.5 (ratio of defined, i.e. multiple: 1.5).
Therefore, the brightness in the second period of sub-frame is to be increased for the brightness of received image signal or to reduce according to being assumed to be.For example, when being assumed to be that brightness for received image signal is 75% (3/4), the brightness in the second period of sub-frame is (3/4-2/3) * 1.5=12.5%.
In example 4, in order to improve the quality of moving image, the upper limit L1 and the upper limit L2 that is provided at the gray level of the picture signal in the second period of sub-frame of the gray level that is provided at the picture signal in the first period of sub-frame is set, concern L1 〉=L2 in order to satisfy.In this example, the upper limit L1 that is used for the first period of sub-frame is 100%, and the upper limit L2 that is used for the second period of sub-frame is 50%.
Be set to 50% because be used for the upper limit L2 of the second period of sub-frame, so the maximal value of the brightness of being felt by observer's eyes has been reduced 25%.Yet, even when the brightness that is used for received image signal maximum (100%), in brightness, also have difference between the first period of sub-frame and the second period of sub-frame.Therefore, alleviated motion blur.
In example 4, from different in the example 1, display board and brightness have by the represented gamma light characteristic of expression formula (1), and consider by the represented gamma light characteristic of expression formula (1), have also produced received image signal.The gray level of received image signal and be assumed to be that display brightness for this gray level has as by the represented relation of expression formula (1).
In example 4, (a) threshold level in each period of sub-frame is set, this threshold level is a reference that is used for the gray level of picture signal, and the gray level that (b) after being increased according to the gray level of received image signal or reducing, is provided at the picture signal in each period of sub-frame so as the gray level of received image signal and in a frame period relation between the time integral brightness show a kind of suitable gamma light characteristic.
In example 4, consider time integral brightness in two period of sub-frame, so that the brightness that in fact coupling is felt by observer's eyes.Especially in example 4, even when the gray level of received image signal is very high, in order to alleviate motion blur, the intensity level in the second period of sub-frame is restricted to display board the maximum possible value half or still less.In the following description, will be described as the maximum brightness level that can be provided by the image display device in the example 4 to 75% intensity level (time integral brightness in a frame period) of the maximum possible value of display board.
In this case, the gray level of received image signal and be provided at the gray level in the first period of sub-frame and the gray level that is provided in the second period of sub-frame has following relation.
(gray level/maximum gray scale of received image signal) γ={ (being provided at the gray level/maximum gray scale in the first period of sub-frame) γ+ (being provided at the gray level/maximum gray scale in the second period of sub-frame) γ}/2 * (1/0.75) (γ=2.2) expression formulas (4)
Figure 26 show received image signal gray level, be provided at the gray level in the first period of sub-frame and be provided at relation between the gray level in the second period of sub-frame, it satisfies expression formula (4).
In Figure 26, left-hand component shows the gray level of received image signal.Center section shows the gray level each that is provided at the first period of sub-frame and the second period of sub-frame after the gray level from received image signal is converted.Right-hand component shows time integral brightness in two period of sub-frame in a frame period.
Figure 26 shows the time integral value of 0%, 25%, 50%, 75%, 83.2% and 100% brightness.
As shown in Figure 26, be assumed to be that the brightness for 83.2% received image signal is set to a threshold level, this threshold level is the reference for the gray level of the picture signal that is provided at each period of sub-frame.When the gray level of received image signal is 83.2% or still less the time, the gray level that is provided at the picture signal in the first period of sub-frame is increased for the brightness of received image signal or reduces according to being assumed to be, in order to satisfy expression formula (4).Be provided at the gray level minimum (0%) of the picture signal in the second period of sub-frame.
When the gray level of received image signal greater than 83.2% the time, be provided at the gray level maximum (100%) of the picture signal in the first period of sub-frame.The gray level that is provided at the picture signal in the second period of sub-frame is increased for the brightness of received image signal or reduces according to being assumed to be, in order to satisfy expression formula (4).
Acquisition is provided at the gray level of the picture signal in the first period of sub-frame, result as received image signal is temporarily stored in the line buffer 41, and from line buffer 41, export, and changed by the first gradation conversion circuit 44 among the control LSI 40A.Acquisition is provided at the gray level of the picture signal in the second period of sub-frame, result as received image signal is temporarily stored in the frame memory 30, and from frame memory 30, export, and changed by the second gradation conversion circuit 45 among the control LSI 40A.
When the gray level that is converted that provides shown in the center section of Figure 26, on according to the brightness of gamma light characteristic, realize that in the first and second period of sub-frame image shows, this gamma light characteristic is processed by the source electrode driver of display board 10, and shown in expression formula (1), and as shown in Figure 54.
As a result, observer's eyes are perceived as brightness with the time integral brightness in first and second period of sub-frame in a frame period, as shown in the right of Figure 26.This gamma light characteristic is reproduced in this time integral brightness, and this gamma light characteristic is assumed to be for received image signal, as by expression formula (1) represented and as shown in Figure 54.Be appreciated that a suitable gamma light characteristic can be reproduced by the image display device in the example 4 and method for displaying image.
In order to utilize image display device in the example 4 and method to show the image of the object that moves in the horizontal direction with a static background, when the gray level of received image signal is enough hanged down, the second period of sub-frame in the display part of the display part that is used for static background and Moving Objects provides the minimal gray level.Therefore, as in the situation of the image display device that is suitable for minimum (brightness) insertion system shown in Figure 52 and 53, alleviated motion blur, and strengthened contrast, in order to improve the quality of moving image.
Figure 27 show when an object along with example 4 in during static background horizontal ground motion in the image display device brightness according to time of a horizontal line in the screen change.As described in the example 7 of the open No.2001-296841 (Figure 52 and 53) of Japan special permission, this object is along with this static background horizontal ground motion.
In Figure 27, transverse axis is illustrated in the luminance state (position of pixel portion in the horizontal direction) on the horizontal direction of screen, and the longitudinal axis represents this time.Figure 27 shows the image that is displayed on this screen in three frames.
In Figure 27, each frame period T101 comprises two period of sub-frame T201 (the first period of sub-frame) and T202 (the second period of sub-frame).For the display part B of static background, the gray level of received image signal is very low.Therefore, in the first period of sub-frame T201, the picture signal that display part B uses the gray level that is increased according to the gray level of received image signal or reduces is in luminance with 40% brightness.In the second period of sub-frame T202, display part B is in not luminance with minimum brightness 0%.For the display part B of this moving image, the gray level of received image signal is higher than the threshold value of defined.Therefore, in the first period of sub-frame T201, display part A is in luminance with 100% high-high brightness.In the second period of sub-frame T202, the picture signal that display part A uses the gray level that is increased according to the gray level of received image signal or reduces is in luminance with 20% brightness.With the numeral of " % " intensity level with respect to the image of 100% maximum display capabilities.For example, be used for the brightness of the numeral 40% that the with dashed lines of B1 surrounds.
Figure 28 shows the distribution of the brightness aspect of the image shown in the Figure 27 that is observed by the observer's who notes Moving Objects eyes.
The shape that Figure 28 shows the point of expression brightness change is the left end of Moving Objects and the difference between the right-hand member, and is represented such as the with dashed lines circle.
Figure 30 shows when being provided for the gray level of the picture signal of employed display board 10 in the example 4 according to the temperature conditions adjustment according to the difference of temperature conditions in brightness.Left-hand component shows the at high temperature response speed of liquid crystal material, and left-hand component shows the at low temperatures response speed of liquid crystal material.Thick line represents this gray level.The brightness that the region representation of being drawn shade changes with the response speed of liquid crystal material.
Because above-described temperature correction function, in the right-hand component of Figure 30, at low temperatures, provide than the gray level of lower picture signal at high temperature in the left side of Figure 30, especially in the second period of sub-frame.Therefore, so that the brightness that causes by the delay in the response of liquid crystal material at low temperatures changes with at high temperature brightness change equates.By this way, do not consider temperature conditions, for the same grey level of picture signal, can keep the brightness of being felt by observer's eyes.
As mentioned above, according to example 4 of the present invention, when showing the image of the object that moves together along with a static background, alleviated motion blur, reduced simultaneously the maximal value of time integral brightness, it is the brightness of being felt by observer's eyes, only is 25%, and does not produce than the unusual bright or unusual dark part of original image.Therefore, can improve the quality of the moving image of handheld image display device.In addition, can show this image with the gray level expressing with the gamma light characteristic that is suitable for received image signal.
(example 5)
In example 5 of the present invention, the picture signal of the separately gray level by the three primary colors red, green and blue is provided, image display device display color.
Figure 31 show when an object during along with the static background horizontal ground motion of the image display device in the example 5 brightness according to the time of a horizontal line in screen change, wherein the image display device in this example 5 has in fact the identical structure with example 1.With the grade of separately brightness, show the three primary colors red, green and blue.For static background, institute's the colorful one intensity level is 0%.For Moving Objects, be assumed to be that the brightness for red received image signal is 75%, and be assumed to be that each the brightness for green received image signal and blue received image signal is 50%.
As shown in Figure 31, in the red, green and blue each, be assumed to be to have above with reference to figure 8 described relations for the brightness of received image signal and the intensity level of first and second period of sub-frame.Therefore, in the first period of sub-frame, for redness, the brightness with 50% shows the part A of Moving Objects, and in the second period of sub-frame, for red, green and blue, the brightness with 100% shows the part A of Moving Objects.
The dotted arrow of the observer's of attention expression accompany movement object eyes is appreciated that in the core of object, as in the still image, observe a kind of suitable color, but only observe redness at the right-hand member of this object, and the left end of this object is then red not enough.Owing to damaged the luminance balance of three kinds of colors, so can observe unusual color.
Reason is, red received image signal has very high gray level, and is displayed in the first and second period of sub-frame, yet green and blue received image signal has very low gray level, and only is displayed in the first period of sub-frame.This just causes in the time state of center of gravity having any different between red and other two kinds of colors in the heart.
For fear of this phenomenon, in example 5, consider two kinds of colors except the color of high grade grey level with received image signal, control is provided at the meeting of the picture signal in the first period of sub-frame and the second period of sub-frame and loses machine.
This is according to following mode specific implementation.Consider the color of the high grade grey level that in three kinds of colors, has received image signal, picture signal with maximum gray scale is provided in the second period of sub-frame, perhaps is increased according to the gray level of received image signal or the picture signal of the gray level that reduces.In the first period of sub-frame, as in example 1, provide the picture signal with minimal gray level, perhaps be increased according to the gray level of received image signal or the picture signal of the gray level that reduces.Consider each in other two kinds of colors, this gray level is set, in order to be displayed on the intensity level in the first period of sub-frame and be displayed on ratio between the intensity level in the second period of sub-frame, equate with the ratio that is displayed on the intensity level in the first period of sub-frame and is displayed between the intensity level in the second period of sub-frame of the color of the high grade grey level with received image signal.
In example 5, the time of picture signal stream and the method that is used for driving display board 10 are in fact identical with example 1, and will not do repeat specification.Hereinafter, different from method in the example 1, a kind of be used to utilizing the first grey level transition circuit 44 and the second grey level transition circuit 45 to change the method for the gray level of the color except the color of high grade grey level with received image signal with describing.
Employed display board 10 has following gamma light characteristic in the example 5, described in example 1.
Display brightness=(gray level/maximum brightness level of received image signal) γ(γ=2.2)
Expression formula (1)
(wherein the maximal value of display brightness is " 1 ", and the minimum value of display brightness is " 0 ").
For the pixel portion in the frame, gray level and the ratio between the maximum gray scale of picture signal that is provided at the color of the high grade grey level with received image signal in the first period of sub-frame is X 1The gray level and the ratio between the maximum gray scale that are provided at the picture signal of the color in the second period of sub-frame are X 2
X 1Gray level/maximum gray scale in the=the first period of sub-frame
X 2Gray level/maximum gray scale in the=the second period of sub-frame
Because this gamma light characteristic, the display brightness in each period of sub-frame is as follows.
Display brightness=X in the first period of sub-frame 1 γ
Display brightness=X in the first period of sub-frame 2 γ
Similarly, the gray level and the ratio between the maximum gray scale that are provided at the picture signal of the color except the color of high grade grey level with received image signal in the first period of sub-frame are Y 1The gray level and the ratio between the maximum gray scale that are provided at the picture signal of that color in the second period of sub-frame are Y 2
Y 1Gray level/maximum gray scale in the=the first period of sub-frame
Y 2Gray level/maximum gray scale in the=the second period of sub-frame
Because this gamma light characteristic, the display brightness in each period of sub-frame is as follows.
Display brightness=Y in the first period of sub-frame 1 γ
Display brightness=Y in the first period of sub-frame 2 γ
In example 5, as mentioned above, be displayed on the intensity level in the first period of sub-frame and be displayed on ratio between the intensity level in the first period of sub-frame of the color except the color of high grade grey level with received image signal, be displayed on the second period of sub-frame in intensity level and the ratio that is displayed between the intensity level in second period of sub-frame of color of the high grade grey level with received image signal equate.
Therefore, obtain lower relation of plane.
Y 1 γ: Y 2 γ=X 1 γ: X 2 γExpression formula (5)
Wherein the gray level of the received image signal of the color except the color of maximum gray scale with received image signal is Y, for a suitable gamma light characteristic being offered the gray level of received image signal and the relational expression between the time integral brightness in a frame period, described in example 4, the expression formula below needing to satisfy.
Y γ=(Y 1 γ+ Y 2 γ)/2 ... expression formula (6)
According to expression formula (5) and (6),
Y 1=Y{2X 1 γ/ (X 1 γ+ X 2 γ) 1/ γExpression formula (7)
Y 2=Y{2X 2 γ/ (X 1 γ+ X 2 γ) 1/ γExpression formula (8)
Therefore, by utilizing the first gradation conversion circuit 44 and the second gradation conversion circuit 45 among the controller LSI 40A, execution is according to the calculating of expression formula (7) and (8), determines the output gray level of the color except the color of high grade grey level with received image signal.
Figure 32 show when an object during along with the static background horizontal ground motion of the image display device in the example 5 brightness according to time of a horizontal line in a screen change.For this static background, institute's the colorful one intensity level is 0%.For Moving Objects, be assumed to be that the brightness for red received image signal is 75%, and be assumed to be that each the brightness for green received image signal and blue received image signal is 50%, as among Figure 31.
As shown in Figure 32, from different among Figure 31, in each period of sub-frame, the brightness ratio between the red, green and blue is maintained a suitable value.Therefore, in the end of Moving Objects owing to the phenomenon that anomalous trichromatism appears in the luminance balance that has destroyed three kinds of colors can not occur.
(example 6)
In example 6 of the present invention, the frame that image shows by the time integral value of the brightness during period of sub-frame (i.e. the first period of sub-frame and the second period of sub-frame) and realization.According to two frames of the image of continuous input, produce by estimating at the image of intermediateness according to the time.When the gray shade scale of received image signal is equal to or less than by well-determined threshold level, increase according to the gray shade scale of the picture signal of input or the picture signal of the gray shade scale that reduces is provided in by a well-determined subframe (for example the first period of sub-frame).When the gray shade scale of picture signal of input during greater than the threshold level, also in the picture signal that maximum gray shade scale is provided by a well-determined period of sub-frame (for example the first period of sub-frame).When the gray-scale value in the picture signal of intermediateness is equal to or less than the threshold level, in other period of sub-frame (for example the second period of sub-frame), provide the picture signal of minimal gray grade.When the gray-scale value in the picture signal of intermediateness is equal to or less than the threshold level, also in other period of sub-frame (for example the second period of sub-frame), provides according to the gray-scale value of the picture signal of intermediateness and increase or the picture signal of the gray-scale value that reduces.
Figure 33 is the block scheme (display control section shown in Figure 1) of the structure of the controller LSI 40 in example 6.In example 6, controller LSI 40 is represented by label 40B.
As shown in figure 33, controller LSI 40B comprises single file impact damper 41a (row data storage area), timing controlled part 42 (timing controlled part), frame memory data selector 43 (frame memory data selection part), the first gradation conversion circuit 44 (the first gradation conversion part), the second gradation conversion circuit 45 (the second gradation conversion part), output data selector 46 (output data selection part), the first multirow impact damper 47 (the first multirow data store is divided), the second multirow impact damper 48 (the second multirow data store is divided), buffered data selector switch 49 (temporarily storing the data selection part) and intermediate image produce circuit 50 (intermediate image generating portion).
Single file impact damper 41a one by one horizontal line ground receives the picture signal of input, and temporarily stores the picture signal of input.Single file impact damper 41a comprises independently receiving port and transmit port, therefore can receive simultaneously and transmitted signal.
Frame storage data selector 43 is timed controller 42 controls, and being used for one by one, horizontal line ground passes to frame memory 30 to the received image signal of storing at single file impact damper 41a.Thereby received image signal is delivered to frame memory 30 within a frame period.Frame memory 30 can not transmit and receive data simultaneously.Therefore, timing controller 42 such converted frames storage data selectors 43 (timing controlled) are so that be read out from frame memory 30 when received image signal does not transmit to frame memory 30.More particularly, read out in to horizontal line one by one with the previous frame period and be read out and be stored in received image signal in the frame memory 30, and be delivered to the first multirow impact damper 47.Meanwhile, and in the mode of timesharing, that two frame periods before reading out in to horizontal line one by one read and be stored in received image signal in the frame buffer 30, and be delivered to the second multirow impact damper 48.
Intermediate image produces circuit 50 and relatively is stored in picture signal in the first multirow impact damper 47 and the second multirow impact damper 48, so as to estimate and produce one between the picture signal of inputting before the frame period and the picture signal inputted before two frame periods in the picture signal of state that mediates aspect the time.
The first multirow impact damper 47 and the second multirow impact damper 48 can be stored the picture signal of tens horizontal line.The scope of the quantity of the pixel portion by in the horizontal direction * tens horizontal line, intermediate image produces circuit 50 more above-mentioned two picture signals, in order to produce the picture signal of the state that mediates in time.Produced such picture signal, for example, as following.From by the picture signal of inputting between two frame periods, pick up a regional area.In this regional area, obtain pixel portion gray level and.The picture signal of before a frame period, inputting, find out and have identical shaped regional area, so as the gray level of the pixel portion in the regional area of the picture signal of (a) before by two frame periods, inputting and and the regional area of the picture signal (b) before by a frame period, inputted in pixel portion gray level and between difference minimum.From being estimated as by the transmission destination of the regional area of the picture signal of input before two frame periods by the regional area of being found out the picture signal of input before the frame period.By the distance that will be transmitted by the regional area motion of the picture signal of input before two frame periods half, obtain a picture signal.By this way, produce the picture signal of the state that mediates in time.Because example 6 is not provided to describe in detail the method for generation of a kind of like this picture signal, thus will be not to the method detailed description of making comparisons.Adopt the method for this picture signal for generation of the state that mediates in time, be not easy to produce an image with insertion of entirely accurate.Therefore, because the error of insertion may cause incorrect demonstration in some pixel portion.
The picture signal that is produced by intermediate image generation circuit 50 is sequentially sent to the second gradation conversion circuit 45.
By input before a frame period and be stored in the picture signal in the first multirow impact damper 47 and also be transmitted to buffer data selector switch 49 by input before two frame periods and picture signal that be maintained in the second multirow impact damper 48.
By timing controller 42 controller buffer data selectors 49, so that according to this Displaying timer, selection is by input before the frame period and picture signal that provide from the first multirow impact damper 47, perhaps by input before two frame periods and picture signal that provide from the second multirow impact damper 48.Selected picture signal is transmitted to the first gradation conversion circuit 44.
With identical in the example 4, the grey level transition of the received image signal that the first gradation conversion circuit 44 will provide from impact damper data selector 49 is maximum gray scale or the gray level that is increased or reduces according to the gray level of received image signal.
With identical in the example 4, the grey level transition that the second gradation conversion circuit 45 will produce the picture signal that provide the circuit 50 from middle image is minimal gray level or the gray level that is increased or reduces according to the gray level of received image signal.
By timing controller 42 control output data selectors 46, in order to select the picture signal of output from the first gradation conversion circuit 44, in order to export this picture signal as the horizontal image signal in the first period of sub-frame, perhaps select the picture signal of output from the second gradation conversion circuit 45, in order to export this picture signal as the horizontal image signal in the second period of sub-frame.
The below comprises description the operation of the image display device in the example 6 of the controller LSI 40B with the above structure.
Figure 34 is the sequential chart by the signal in the image display device of horizontal cycle in example 6.
In Figure 34, a transmission cycle of a frame of each rectangular block presentation video.Letter in the rectangular block, for example which frame of " N " and " N+1 " each presentation video signal will be transmitted.Ci[f in the rectangular block of horizontal image signal] signal of expression, this signal is that i gradation conversion circuit (the first gradation conversion circuit 44 or the second gradation conversion circuit 45) obtains by the received image signal that conversion is used for the f frame.Picture signal with state that mediates between two frames in time of bracket ([,]) expression of comma.For example, C2[N-1, N] signal of expression will be transmitted, and to be the second gradation conversion circuit obtain by mediate the before picture signal of state of conversion (N-1) frame and N state this signal.
For frame memory 30, the region representation one-period of hatching, write signal in this cycle, and white space represents one-period, read signal in this cycle.Because frame memory 30 can not read and data writing simultaneously, write so realize in the mode of timesharing that data read with data.
As shown in Figure 34, in example 6, one-period, the picture signal in a frame period is transfused in this cycle, comprises two period of sub-frame (the first and second period of sub-frame).In the first period of sub-frame, export a picture signal, this picture signal is by utilizing 44 conversions of the first gradation conversion circuit to be obtained by the picture signal of input before two frames.In the second period of sub-frame, export a picture signal, this picture signal is by being obtained by the picture signal of input before the frame period with by the picture signal of the state that mediates in time between the picture signal of input before two frame periods by 45 conversions of the second gradation conversion circuit.
In example 6, by with the diverse ways of the example 1 shown in Fig. 3 and 4, drive display board 10.Example 6 employings begin the general method that a horizontal line one horizontal line ground sequentially transmits this picture signal from the uppermost row on this screen.
How Figure 35 shows and rewrites picture signal at a screen in the image display device in example 6.Especially, Figure 35 shows in the cycle of inputting the picture signal that is used for N frame and N+1 frame how to rewrite this picture signal.
In Figure 35, tiltedly arrow represents lengthwise position and timing, in this timing, rewrites the picture signal of a horizontal line.Ci[f] expression, show picture signal for the f frame by a picture signal utilizing i gradation conversion circuit (the first gradation conversion circuit 44 and the second gradation conversion circuit 45) to change.Picture signal with state that mediates between two frames in time of bracket ([,]) expression of comma.Keep this image display information, until be used for being rewritten with the picture signal of delegation.In Figure 35, white space represents a position, on this position, the image display information that reservation is changed by the first gradation conversion circuit 44, and draw position of region representation of shade, on this position, keep the image display information of being changed by the second gradation conversion circuit 45.Dotted line represents the boundary line between driven first to fourth gate drivers 14a to 14d.
The lengthwise position of attention horizontal line on this screen, the below will understand: during half of a frame, by utilizing the picture signal that the picture signal of input obtains before 44 two frame periods of conversion of the first gradation conversion circuit, realize that image shows; And in next of this frame during half, by the picture signal that the picture signal of being changed the state that mediates in time between the picture signal of inputting before the frame periods and the picture signal of the inputting before two frame periods by the second gradation conversion circuit 45 obtains, the realization image shows.The first half of this frame is known as the first period of sub-frame, and this frame the second half be known as the second period of sub-frame.
Figure 36 show when an object during along with the static background horizontal ground motion in the image display device in the example 6 brightness according to time of a horizontal line in a screen change.Identical among the display brightness level of Moving Objects and static background and Figure 27 (example 4).
In Figure 36, transverse axis represents the luminance state of (position of the pixel portion on the horizontal direction) on the horizontal direction of this screen, and the longitudinal axis represents the time.Figure 36 shows with three frames and is displayed on image on this screen.
In Figure 36, each frame period T101 comprises two period of sub-frame T201 (the first period of sub-frame) and T202 (the second period of sub-frame).For the display part B of this static background, the gray level of received image signal is very low.Therefore, in the first period of sub-frame T201, display part B is increased or 40% brightness of the picture signal of the gray level that reduces is in luminance at the ratio of regulation having according to the gray level of received image signal.In the second period of sub-frame T202, display part B is in not luminance in 0% minimum brightness level.For the display part A of this Moving Objects, the gray level of received image signal is enough high.Therefore, in the first period of sub-frame T201, display part A is in luminance in 100% brightness.On the second period of sub-frame T202, display part A is increased or 20% brightness of the picture signal of the gray level that reduces is in luminance at the ratio of regulation having according to the gray level of (by what estimate to produce) picture signal of the state that mediates in time.With the numeral of " % " intensity level with respect to 100% maximum display capabilities image.For example, be used for the brightness of the numeral 40% that the with dashed lines of B1 surrounds.
Image based on the state that mediates in time between the picture signal of in advance input produces the image that is displayed in the second period of sub-frame.Therefore, on the position on the row of being followed by the observer's who notes this Moving Objects eyes, show this Moving Objects.
Figure 37 shows the distribution by the brightness aspect of the image shown in viewed Figure 36 of eyes of the observer who notes this Moving Objects.
The display part A of this Moving Objects is on the row of being followed by the eyes of the observer in the image that is displayed in the second period of sub-frame.Therefore, for the observer, be easy to distinguish the border between static background and the Moving Objects.As a result, little in the situation of traditional handheld image display device of half shown in Width Figure 49 of motion blur.The width of motion blur even little than in the situation of the image display device in the example 4 shown in Figure 28.The phenomenon of the part that the existence shown in Figure 53 is bright or darker than original image does not occur.
Estimating based on two frame image signals and producing in the situation of picture signal of the state that mediates, because the error of insertion may cause incorrect demonstration on some pixel portion.By the time aspect that this picture signal is configured in the second period of sub-frame state that mediates, in this second period of sub-frame, be implemented to the conversion of relatively low end gray level, and configuration is input to the picture signal of the first period of sub-frame from the outside, in this first period of sub-frame, be implemented to the conversion of relatively high gray level, can be so that this incorrect demonstration be difficult to sensation.
In example 6, as in example 4, be provided at the picture signal among of period of sub-frame gray level upper limit L1 and be provided at the upper limit L2 of the gray level of the picture signal in another period of sub-frame, be set to satisfy relational expression L1 〉=L2.By this set, even also can between the first period of sub-frame and the second period of sub-frame, provide the luminance difference that is equal to or greater than a setting when being assumed to be when maximum for the brightness of received image signal.Therefore, can alleviate motion blur.
In example 6, (a) can be set as the threshold level of the reference of the gray level that in each period of sub-frame, is used for picture signal, and the gray level that (b) after being increased according to the gray level of received image signal or reducing, is provided at the picture signal in each period of sub-frame, so that the relation between the time integral value of the gray level of received image signal and the brightness in a frame period represents a suitable gamma light characteristic.By this set, can show to have the image that gray scale represents, this gray scale shows to have the gamma light characteristic that is suitable for received image signal.
In example 6, can be according to from the temperature level signal setting (a) of the temperature sensor IC 20 threshold level as the reference of the gray level that in each period of sub-frame, is used for picture signal, and the gray level that (b) after being increased according to the gray level of received image signal or reducing, is provided at the picture signal in each period of sub-frame, wherein this temperature sensor IC 20 is for detection of the temperature of display board 10 or near the temperature it.By this set, even when display board 10 uses liquid crystal material, do not consider temperature conditions, also can keep the gray level of received image signal and the brightness felt by observer's eyes between relation.
In example 6, have at received image signal in the situation of a plurality of colour components, the gray level that is provided at the picture signal in each period of sub-frame is set up as follows.Consider except the color of high grade grey level with received image signal (for example, redness) each in two kinds of colors outside, this gray level is set, in order to be displayed on the intensity level in the first period of sub-frame and be displayed on ratio between the intensity level in the second period of sub-frame, be displayed on the first period of sub-frame in intensity level and the ratio that is displayed on the color of the high grade grey level with received image signal between the intensity level in the second period of sub-frame equate.Adopt this set, the brightness ratio between the color is maintained at a suitable value, and can prevent because the deterioration on picture quality that incorrect color balance causes.
(example 7)
In example 7 of the present invention, the time integral value by during two period of sub-frame (that is, the first period of sub-frame and the second period of sub-frame), asking brightness and, realize that the image of a frame shows.
When the gray level of received image signal is equal to or less than by well-determined threshold level, at one of the period of sub-frame of being stipulated by displacement (for example, the first period of sub-frame) in, provides the picture signal of a gray level that is increased according to the gray level of received image signal or reduces.
When the gray level of received image signal during greater than this threshold level, or in by one (for example, the first period of sub-frame) of the period of sub-frame of unique regulation, provide the picture signal of a maximum gray scale.
When before the gray level of the picture signal in current frame period and the frame or the mean value of the gray level of the picture signal that is transfused to after the frame when being equal to or less than this threshold level, in another period of sub-frame (for example, the second period of sub-frame) in, provides the picture signal of a minimal gray level.
When this mean value during greater than this threshold level, or in this another period of sub-frame (for example, the second period of sub-frame), provide the picture signal of a gray level that is increased according to this mean value or reduces.
Figure 38 is that controller LSI 40 in the example 7 is (as display control section; Shown in Fig. 1) the calcspar of structure.In example 7, controller LSI 40 usefulness reference number 40C represent.
As shown in Figure 38, controller LSI 40C comprises the gray level circuit 51 (gray level average part) of averaging, rather than the intermediate image among Figure 33 (example 6) produces circuit 50.Gray level is averaged circuit 51 with being stored in respectively the gray level addition of two picture signals in the first multirow impact damper 47 and the second multirow impact damper 48, in order to calculate the mean value of the gray level of two picture signals.The mean value that obtains is provided for the second gradation conversion circuit 45.
Controller LSI 40C with example 6 in the identical in fact mode of controller LSI 40B operate.
The stream that one frame of the image in the example 7 connects a frame as shown in Figure 34, with identical in the example 6.Yet should be noted that, in example 7, the picture signal that the mean value of bracket ([, the]) expression with comma by the picture signal of two frames obtains.
By this way, in the first period of sub-frame, export a picture signal, it is to obtain by the picture signal input of having been inputted by 44 conversions of the first gradation conversion circuit, and in the second period of sub-frame, the picture signal that mean value obtained of two frame image signals of being inputted is continuously changed in output by the second gradation conversion circuit 45.
Figure 39 show when an object during along with the static background horizontal ground motion in the image display device in the example 7 brightness according to time of a horizontal line in a screen change.Identical among the display brightness level of this Moving Objects and this static background and Figure 27 (example 4).
In Figure 39, transverse axis is illustrated in the luminance state of (position of pixel portion in the horizontal direction) on the horizontal direction of this screen, and the longitudinal axis represents the time.Figure 39 shows the image that is displayed on this screen reward with three frames.
In Figure 39, each frame period T101 comprises two period of sub-frame T201 (the first period of sub-frame) and T202 (the second period of sub-frame).For the display part B of this static background, the gray level of received image signal is very low.Therefore, in the first period of sub-frame T201, display part B is in luminance in 40% brightness of the picture signal with the gray level that is increased according to the gray scale of received image signal or reduces.In the second period of sub-frame T202, display part B is in not luminance in 0% minimum brightness.For the display part A of this Moving Objects, the mean value of the gray level of the gray level of received image signal and two frame image signals is all enough high.Therefore, in the first period of sub-frame T201, display part A is in luminance in 100% brightness.In the second period of sub-frame T202, display part A is 10%, 20% and then have according to the mean value of the gray level of two frame image signals of sequentially being inputted and be increased or the brightness of the picture signal of the gray level that reduces is in luminance.Wherein brightness is to be a kind of like this cycle in 10% cycle, in this cycle, by the gray level of the second gradation conversion circuit 45 conversion according to the mean value of the gray level of the gray level of Moving Objects and static background.With the numeral of " % " intensity level with respect to 100% maximum display capabilities image.For example, be used for the brightness of the numeral 40% of being surrounded by dotted line of C.
According to this set, when the gray level of received image signal is enough low, in both the second period of sub-frame of the display part B of the display part A that is used for Moving Objects and static background, provide the picture signal of minimum brightness level.Therefore, can improve the quality (as in the image display device that adopts minimum (brightness) insertion system as shown in Figure 50 and 51) of moving image.
Figure 40 shows the distribution by the brightness aspect of the image shown in viewed Figure 39 of eyes of the observer who notes this Moving Objects.
The shape that represents the line that this brightness changes is poor between the left end of Moving Objects and the right-hand member, and is represented such as the with dashed lines circle, Figure 28 shown in phenomenon disappeared.Solved the shortcoming shown in Figure 53, this shortcoming is to have the part bright or darker than original image.
In example 7, be provided at the upper limit L1 of gray level of the picture signal among of this period of sub-frame and the upper limit L2 that is provided at the gray level of the picture signal in another period of sub-frame and be set to satisfy relational expression L1 〉=L2.By this set, even also can between the first period of sub-frame and the second period of sub-frame, provide the luminance difference that is equal to or greater than a setting when being assumed to be when maximum for the brightness of received image signal.Therefore, can alleviate this motion blur.
In example 7, (a) can be set as the threshold level of the reference of the gray level that in each period of sub-frame, is used for picture signal, and the gray level that (b) after being increased according to the gray level of received image signal or reducing, is provided at the picture signal in each period of sub-frame, so that the relation between the time integral value of the gray level of received image signal and the display brightness in a frame period represents a suitable gamma light characteristic.By this set, can adopt the gray scale with the gamma light characteristic that is suitable for received image signal to represent to show image.
In example 7, can be according to from the temperature level signal setting (a) of the temperature sensor IC 20 threshold level as the reference of the gray level that is used for picture signal in each period of sub-frame, and the gray level that (b) after being increased according to the gray level of received image signal or reducing, is provided at the picture signal in each period of sub-frame, this temperature sensor IC 20 is for detection of the temperature of display board 10 or near the temperature it.By this set, even when display board 10 uses liquid crystal material, do not consider temperature conditions, also can keep the gray level of received image signal and the brightness felt by observer's eyes between relation.
In example 7, have at received image signal in the situation of a plurality of colour components, the gray level that is provided at the picture signal in each period of sub-frame can be set up as follows.Consider except the color of high grade grey level with received image signal (for example, redness) two kinds of colors outside (for example, green and blue) each in, this gray level is set, in order to be displayed on the intensity level in the first period of sub-frame and be displayed on ratio between the intensity level in the second period of sub-frame, be displayed on the first period of sub-frame in intensity level and the ratio that is displayed on the color of the high grade grey level with received image signal between the intensity level in the second period of sub-frame equate.Adopt this set, the brightness ratio between the color is maintained at a suitable value, and can prevent because the deterioration of the picture quality aspect that incorrect color balance causes.
(example 8)
In example 8 of the present invention, the time integral value by during three period of sub-frame, asking brightness and, realize that the image of a frame shows.Be in time in the period of sub-frame (central period of sub-frame) at the center in a frame period, the picture signal of maximum gray scale is provided, perhaps be increased according to the gray level of received image signal or the picture signal of the gray level that reduces.In each of period of sub-frame after period of sub-frame before central period of sub-frame and the central period of sub-frame, provide the picture signal of minimal gray level, perhaps be increased according to the gray level of received image signal or the picture signal of the gray level that reduces.The center in a frame period is also called " time state " center " in time.
Figure 41 is that controller LSI40 in the example 8 is (as display control section; Shown in Fig. 1) the calcspar of structure.In example 8, controller LSI40 represents with reference number 40D.
As shown in Figure 41, controller LSI 40D comprises line buffer 41 (row data memory portion), timing controller 42 (timing controlled part), frame memory data selector 43 (frame memory data selection part), gradation conversion source selector 52 (part is selected in the gradation conversion source), the first gradation conversion circuit 44 (the first gradation conversion part), the second gradation conversion circuit 45 (the second gradation conversion part) and output data selector 46 (output data selection part).
Line buffer 41 1 horizontal line connect horizontal line ground and receive received image signal, and temporary this received image signal.Line buffer 41 comprises receiving unit and transmitting portion independently, and therefore can receive simultaneously and transmitted signal.
Frame memory data selector 43 is by timing controller control, so that received image signal one horizontal line that will be stored in the device line buffer 42 sends frame buffer 30 to with connecing a horizontal line.Be stored in the line buffer 41 received image signal also be transmitted to gradation conversion source selector 52.
Replacedly, adopt to the data of frame memory 30 and transmit, timing controller 42 1 horizontal line read former stored and be stored in the picture signal from two lengthwise positions on this screen in the frame memory 30 with connecing a horizontal line.Then, this frame memory data selector 43 of timing controller 42 conversion is in order to send the picture signal that reads to the first gradation conversion circuit 44 and gradation conversion source selector 52.At this moment, the picture signal before 1/4 frame is read and is transmitted to the first gradation conversion circuit 44 from frame memory 30, and the picture signal before 3/4 frame is read and is transmitted to gradation conversion source selector 52 from frame memory 30.
By timing controller 42 control gradation conversion source selectors 52, so that according to Displaying timer, select from the picture signal in the line buffer 41, perhaps from the picture signal before 3/4 frame of frame memory data selector 43.Gradation conversion source selector 52 sends selected picture signal to second gradation conversion circuit 45.
The grey level transition of the picture signal before 1/4 frame that the first gradation conversion circuit 44 will provide from frame memory data selector 43 is maximum gray scale or is increased or the picture signal (with identical in the example 4) of the gray level that reduces according to the gray level of received image signal.
The grey level transition of the picture signal before 3/4 frame that the second gradation conversion circuit 45 will provide from gradation conversion source selector 52 is the minimal gray level or is increased or the picture signal (with identical in the example 4) of the gray level that reduces according to the gray level of received image signal.
Output data selector 46 is by timing controller 42 control, so that according to Displaying timer, selects from the picture signal of the first gradation conversion circuit 44 or from the picture signal of the second gradation conversion circuit 45.Output data selector 46 sends to image displaying part with selected picture signal as a horizontal image signal.
The below comprises description the operation of the image display device in the example 8 of controller LSI 40D, and this controller LSI 40D has above-described structure.
Figure 42 is the sequential chart according to the signal in the image display device in the example 8 of horizontal cycle.In Figure 42, it is picture signal of N frame ground the first horizontal line to the three horizontal line input.
In Figure 42, each rectangular block represents a transmission cycle of a two field picture.At bracket
Figure G2009101605373D01061
In this frame of letter representation and this horizontal line, wherein, the input with the picture signal that is transmitted.For example, [f, 1] picture signal of being illustrated in the first horizontal line of f frame will be transmitted.[N, 2] are illustrated in the picture signal of inputting in the second horizontal line of N frame and will be transmitted.M1 is capable to be in the vertical away from the horizontal line of 1/4 screen of the first horizontal line on this screen.In example 8, M1 is capable to be the capable horizontal line that drives of the first gate voltage by second grid driver 14b.M2 is capable to be in the vertical away from the horizontal line of 3/4 screen of the first horizontal line on this screen.In example 8, M2 is capable to be the capable horizontal line that drives of the first gate voltage by the 4th gate drivers 14d.Next comfortable this frame that " C1 " expression is changed by the first gradation conversion circuit 44 and at afterwards bracket immediately
Figure G2009101605373D01062
Shown in horizontal line in the picture signal of the received image signal that is transfused to will be transmitted.Next comfortable this frame that " C2 " expression is changed by the second gradation conversion circuit 45 and at afterwards bracket immediately
Figure G2009101605373D01063
Shown in horizontal line in the picture signal of the received image signal that is transfused to will be transmitted.
In operation, received image signal at first connects horizontal line ground by line buffer 41 1 horizontal line and receives, as among Figure 42 shown in the arrow D1.
Meanwhile, shown in arrow D3, from frame memory 30, read in the vertical from before 1/4 screen, being stored in the picture signal of a horizontal line in the frame memory 30 picture signal of current input, and offer the first gradation conversion circuit 44.By the first gradation conversion circuit 44 these picture signals of conversion, and as a horizontal image signal output.Similarly, from frame memory 30, read in the vertical from before 3/4 screen, being stored in the picture signal of a horizontal line in the frame memory 30 picture signal of current input, and offer the second gradation conversion circuit 45.Change these picture signals by the second gradation conversion circuit 45, and export to image displaying part as a horizontal image signal.The picture signal of a horizontal line that receives by current input and by line buffer 41 is written into frame memory 30, as represented with arrow D2, and is provided for the second gradation conversion circuit 45.By the second gradation conversion circuit 45 these picture signals of conversion, and as a horizontal image signal output.
The horizontal image signal of output one horizontal line from controller LSI 40D, and according to a clock signal, be transmitted to first to fourth source electrode driver 13a to 13d.Then, when a latch pulse signal was provided, output was corresponding to the demonstration voltage of the display brightness of each pixel portion from separately source voltage is capable.At this moment, will be provided with the vertical shift clock signal corresponding to the gate drivers of this horizontal line, perhaps as required door enabling pulse, this gate drivers will be provided with the electric charge on source voltage is capable (demonstration voltage) that shows for image.Therefore, with the capable ON state that places of gate voltage of correspondence.Gate drivers for not being used for image and showing places the LOW level with this enable signal, and therefore with the capable OFF state that places of gate voltage of correspondence.By this way, during the cycle of the picture signal of inputting a horizontal line, the picture signal of three horizontal line is transmitted to this display board and shows to be used for image.Repeat this operation.
In example shown in Figure 42, shown in arrow D4, the picture signal of the M2 of N-1 frame capable (horizontal line) is transmitted to source electrode driver.Then, shown in arrow D5, be placed in the HIGH level from the enable signal of controller LSI 40D to the four gate drivers 14d.Represented such as arrow D6 and D7, a start dialing signal and a vertical shift clock signal all are provided for the 4th gate drivers 14d.As a result, shown in arrow D8, the TFT 12b of the first gate voltage that is connected to the 4th gate drivers 14d capable (corresponding to capable at the M2 on this screen aspect the display part) is placed in the ON state.Therefore, realize that image shows.At this moment, for the first to the 3rd gate drivers 14a, the 14b on the display part and the enable signal of 14c are not in the OFF state.
Then, as represented with arrow D9, send the picture signal of the M1 capable (horizontal line) of N-1 frame to source electrode driver.Then, as represented with arrow D10, the enable signal from controller LSI 40D to second grid driver 14b is placed in the HIGH level.As represented with arrow D10 and D11, start dialing signal and vertical shift clock signal are offered second grid driver 14b.As a result, as represented with arrow D13, the TFT 12b of the second gate voltage that is connected to first grid driver 14b capable (corresponding to capable at the M1 on this screen aspect the display part) is placed in the ON state.Therefore, realize that image shows.At this moment, be placed in the LOW level to not the first, third and fourth gate drivers 14a, the 14c on the display part and the enable signal of 14d, and the TFT 12b that is connected to the first, third and fourth gate drivers 14a, 14c and 14d is in the OFF state.
Then, as represented with arrow D14, send the picture signal of the first row (horizontal line) of N frame to source electrode driver.Then, as represented with arrow D15, the enable signal from controller LSI 40D to first grid driver 14a is placed in the HIGH level.As represented with arrow D16 and D17, start dialing signal and vertical shift clock signal are offered first grid driver 14a.As a result, as represented with arrow D18, the TFT 12b of the first gate voltage that is connected to first grid driver 14a capable (corresponding to capable at the M1 on this screen aspect the display part) is placed in the ON state.Therefore, realize that image shows.At this moment, be placed in the LOW level to not the second to the 4th gate drivers 14b, the 14c on the display part and the enable signal of 14d, and the TFT 12b that is connected to the second to the 4th gate drivers 14b, 14c and 14d is in the OFF state.
Figure 43 shows how to write picture signal by repeating the demonstration control shown in Figure 42 at this screen.Especially, Figure 43 shows in the cycle of inputting the picture signal that is used for N frame and N+1 frame how to write this picture signal.
In Figure 43, tiltedly arrow represents lengthwise position and timing, in this timing, writes the picture signal of a horizontal line.Ci[f] expression shows picture signal for the f frame according to the picture signal of being changed by i gradation conversion circuit (the first gradation conversion circuit 44 and the second gradation conversion circuit 45).Keep this image display information, until write for the picture signal with delegation.In Figure 43, white space represents to keep the position of the image display information of being changed by the first gradation conversion circuit 44, and the region representation of picture shade keeps the position of the image display information of being changed by the second gradation conversion circuit 45.Dotted line represents the boundary line between driven first to fourth gate drivers 14a to 14d.
The lengthwise position of attention horizontal line on this screen will be understood following aspect: during half of a frame, realize that according to the picture signal of being changed by the first gradation conversion circuit 44 image shows; And before the field and a frame afterwards per 1/4 during, realize that according to the picture signal of being changed by the second gradation conversion circuit 45 image shows.First of one frame period 1/4 is known as the first period of sub-frame, and half frame period after this is known as the second period of sub-frame, and a frame period last 1/4 be known as the 3rd period of sub-frame.
As shown in Figure 42, when inputting the picture signal of a frame, (a) cycle that the picture signal of wherein being changed by the first gradation conversion circuit 44 is used to show, and the picture signal of (b) wherein being changed by the second gradation conversion circuit 45 cycle of being used to show, all be half of a frame period.Therefore, the first gradation conversion circuit 44 and the second gradation conversion circuit 45 can be changed this picture signal, so that the gray level that is converted has in fact and the relation identical such as the gray level of the received image signal in the example 4.Therefore, alleviate motion blur, thereby improved the quality of moving image, and obtained a kind of suitable gamma light characteristic.
In order to utilize image display device in the example 8 and method to show the image of an object that moves in the horizontal direction along with static background, when the gray level of received image signal was enough low, the first period of sub-frame and the 3rd period of sub-frame in the display part of the display part that is used for static background and Moving Objects provided the minimal gray level.Therefore, the situation as at the image display device that is suitable for the minimum as shown in Figure 50 and 51 (brightness) insertion system has alleviated motion blur, thereby has improved the quality of moving image.
Figure 44 show when an object during along with the static background horizontal ground motion in the image display device in the example 8 brightness according to time of the horizontal line in a screen change.Identical among the display brightness level of Moving Objects and static background and Figure 27 (example 4).
In Figure 44, transverse axis is illustrated in the luminance state of (position of pixel portion in the horizontal direction) on the horizontal direction of screen, and the longitudinal axis represents the time.Figure 44 shows with three frames and is displayed on image on this screen.
In Figure 44, each frame period T101 comprises three period of sub-frame T301 (the first period of sub-frame), T302 (the second period of sub-frame) and T303 (the 3rd period of sub-frame).For the display part B of static background, the gray level of received image signal is very low.Therefore, in the second period of sub-frame T302, display part B is in luminance in 40% brightness of the picture signal with the gray level that is increased according to the gray level of received image signal or reduces.In the first and the 3rd period of sub-frame T301 and T303, display part B is in not luminance in 0% minimum brightness.For the display part A of Moving Objects, the gray level of received image signal is enough high.Therefore, in the second period of sub-frame T302, display part A is in luminance in 100% brightness.In the first and the 3rd period of sub-frame T301 and T303, display part A is in luminance in 20% brightness of the picture signal with the gray level that is increased according to the gray level of received image signal or reduces.The numeral that adopts " % " is with respect to the intensity level of 100% maximum brightness level image.For example, be used for the brightness of the numeral 0% that the dotted line of C surrounds.
Figure 45 shows the distribution by the brightness aspect of the image shown in viewed Figure 44 of eyes of the observer who notes Moving Objects.
Phenomenon shown in Figure 28 (example 4) has been solved, and the shape of the row that this phenomenon changes for expression brightness is different between such as the left end of the represented Moving Objects of with dashed lines circle and right-hand member.
In example 8 (in example 4), (a) can be set according to the temperature level signal from temperature sensor IC 20 as the threshold level that is used in the reference of the gray level of the picture signal of each period of sub-frame, and the gray level that (b) after being increased according to the gray level of received image signal or reducing, is provided at the picture signal in each period of sub-frame, this temperature sensor IC 20 is for detection of the temperature of display board 10 or near the temperature it.By this set, even when display board 10 uses liquid crystal material, do not consider temperature conditions, also can keep the gray level of received image signal and the brightness felt by observer's eyes between relation.
In example 8, comprise at received image signal in the situation of multicolour composition, the gray level that is provided at the picture signal in each period of sub-frame can be set up as follows.Consider be in the high grade grey level with received image signal color (for example, redness) two kinds of colors outside (for example, green and blue) each in, this gray level is set, in order to be displayed on the intensity level in the first period of sub-frame and be displayed on ratio between the intensity level in the second period of sub-frame, equate with the ratio that is displayed on the intensity level in the first period of sub-frame and is displayed between the intensity level in the second period of sub-frame of the color of the high grade grey level with received image signal.Adopt this set, the brightness ratio between the color is maintained at a suitable value, and can prevent because the deterioration on the picture quality that incorrect color balance causes.
According to the image display device of example 1 to 7 of the present invention, show by image time integral value and that realize a frame of during two period of sub-frame, asking brightness.According to the image display device in the example 8 of the present invention, show by image time integral value and that realize a frame of during three period of sub-frame, asking brightness.The present invention is not limited to these.The present invention can be applied to a kind of image display device, it be used for by during n period of sub-frame (wherein n is equal to or greater than 2 integer) ask brightness time integral value with the image demonstration that realizes a frame.
By during n period of sub-frame (wherein n is equal to or greater than 2 integer) ask brightness time integral value and, realize that the image of a frame shows, for example, in the following manner.Be in time the center (wherein n is odd number) in a frame period or in the period of sub-frame near this center (wherein n is even number), provide the picture signal of following gray level: the maximum brightness level in n period of sub-frame in the scope of the intensity level time integral intensity level and that do not surpass received image signal.(be in time the center (wherein n is odd number) in a frame period or will be known as " central period of sub-frame " near the period of sub-frame of this center (wherein n is even number).) when the intensity level time integral intensity level in central period of sub-frame and that still do not surpass received image signal, before central period of sub-frame and in each of period of sub-frame afterwards, provide the picture signal of following gray level: in n period of sub-frame the time integral intensity level and not above the maximum brightness level in the scope of the intensity level of received image signal.(period of sub-frame before the central period of sub-frame will be known as " period of sub-frame of front ", and the period of sub-frame after the central period of sub-frame will be known as " period of sub-frame afterwards ".) can provide simultaneously this picture signal in period of sub-frame in front and the period of sub-frame afterwards.Replacedly, can be first provide this picture signal in front the period of sub-frame, and then in period of sub-frame afterwards, provide.Also alternatively, this picture signal can be provided in period of sub-frame afterwards first, and then provide in the period of sub-frame in front.When the intensity level time integral intensity level in the period of sub-frame of central period of sub-frame, front and period of sub-frame afterwards and that still do not surpass received image signal, in period of sub-frame before the period of sub-frame in front and each of the period of sub-frame after period of sub-frame afterwards, provide the picture signal of following gray level: the maximum brightness level in n period of sub-frame in the scope of the intensity level time integral intensity level and that do not surpass received image signal.Repeat this operation, until the gray level time integral intensity level and that reach received image signal in all period of sub-frame of picture signal is provided.When this situation occurs, in the residue period of sub-frame, provide the picture signal of minimum brightness level.
To be equal to or greater than in the situation of 3 odd number at " n ", the time integral value by during n period of sub-frame, asking brightness and, realize that the image of a frame shows, for example, as follows.From nearest in time period of sub-frame, perhaps the latest period of sub-frame since the time, this period of sub-frame be known as the first period of sub-frame, the second period of sub-frame ..., the n period of sub-frame.The period of sub-frame that is in time the center is known as " m period of sub-frame " (wherein m=(n+1)/2).Provide (n+1)/2 a threshold level, as the reference of the gray level that is used for received image signal.From the threshold level of minimum, these threshold levels be known as T1, T2 ..., T[(n+1)/2].When the gray level of received image signal is T1 or more hour, in the m period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided, and in other period of sub-frame, provides the picture signal of minimal gray level.When the gray level of received image signal greater than T1 and when being equal to or less than T2, the picture signal of maximum gray scale is provided in the m period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided in each of (m-1) period of sub-frame and (m+1) period of sub-frame, and the picture signal that the minimal gray level is provided in other period of sub-frame.When the gray level of received image signal greater than T2 and when being equal to or less than T3, the picture signal of maximum gray scale is provided in each of m period of sub-frame, (m-1) period of sub-frame and (m+1) period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided in each of (m-2) period of sub-frame and (m+2) period of sub-frame, and the picture signal that the minimal gray level is provided in other period of sub-frame.By this way, when the gray level of received image signal greater than Tx-1 (x is equal to or greater than 4 integer) and when being equal to or less than Tx, the picture signal of maximum gray scale is provided in each of [m-(x-2)] ` period of sub-frame to the [m+ (x-2)] period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided in each of [m-(x-1)] period of sub-frame to the [m+ (x-1)] period of sub-frame, and the picture signal that the minimal gray level is provided in other period of sub-frame.
To be equal to or greater than in the situation of 2 even number at " n ", the time integral value by during n period of sub-frame, asking brightness and, realize that the image of a frame shows, for example, as follows.From nearest in time period of sub-frame, perhaps the latest period of sub-frame since the time, this period of sub-frame be known as the first period of sub-frame, the second period of sub-frame ..., the n period of sub-frame.Two period of sub-frame that are in time the center are known as " m1 period of sub-frame " (wherein m1=n/2) and " m2 period of sub-frame " (wherein m1=n/2+1).Provide n/2 threshold level, as the reference of the gray level that is used for received image signal.From the threshold level of minimum, these threshold levels be known as T1, T2 ..., T[n/2].When the gray level of received image signal is T1 or more hour, in m1 period of sub-frame and m2 period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided, and in other period of sub-frame, provides the picture signal of minimal gray level.When the gray level of received image signal greater than T1 and when being equal to or less than T2, the picture signal of maximum gray scale is provided in m1 period of sub-frame and m2 period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided in each of (m1-1) period of sub-frame and (m2+1) period of sub-frame, and the picture signal that the minimal gray level is provided in other period of sub-frame.When the gray level of received image signal greater than T2 and when being equal to or less than T3, the picture signal of maximum gray scale is provided in each of m1 period of sub-frame, m2 period of sub-frame, (m1-1) period of sub-frame and (m2+1) period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided in each of (m1-2) period of sub-frame and (m2+2) period of sub-frame, and the picture signal that the minimal gray level is provided in other period of sub-frame.By this way, when the gray level of received image signal greater than Tx-1 (x is equal to or greater than 4 integer) and when being equal to or less than Tx, the picture signal of maximum gray scale is provided in each of [m1-(x-2)] ` period of sub-frame to the [m2+ (x-2)] ` period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided in each of [m1-(x-1)] period of sub-frame to the [m2+ (x-1)] period of sub-frame, and the picture signal that the minimal gray level is provided in other period of sub-frame.
The upper limit that is provided at the gray level of the picture signal in each period of sub-frame can be determined as follows.Be provided at first, second ..., the picture signal in the n period of sub-frame the upper limit of gray level be known as respectively L1, L2 ..., Ln.Be in time the center or connect paracentral period of sub-frame most and be known as the j period of sub-frame.Stipulate this upper limit, so that the relational expression below satisfying.
L[j-i]≥L[j-(i+1)]；
L[j+i]≥L[j+(i+1)]
Wherein i is equal to or greater than 0 and less than the integer of j.
The upper limit of so determining can be used as being provided at the maximal value of the gray level in each period of sub-frame.
Adopt this control, the time state center of the center of gravity of display brightness can be fixed on the position at the center that is in time a frame period or connect paracentral position most.Therefore, deterioration on the picture quality that can suppress to be caused by incorrect brightness or color balance, this incorrect brightness or color balance be when the position at the time state center of the center of gravity of display brightness change according to the gray level of received image signal (as, for example, described in the open No.2001-296841 of Japan special permission).Because intensity level is different between period of sub-frame, thus motion blur alleviated, thus improved the quality of moving image.Even when realizing this demonstration with maximum brightness level, also can be suppressed at the minimizing of high-high brightness and contrast aspect, this minimizing is to occur along with minimum (brightness) insertion system (adopt this system, each frame period comprises the minimum brightness cycle).
(example 9)
In example 9 of the present invention, by during two period of sub-frame (i.e. the first period of sub-frame and the second period of sub-frame) ask brightness time integral value and, realize that the image of a frame shows.Utilize the digital message entry system source electrode driver, change the gamma light characteristic.
Or in example 9, when the gray level of received image signal is 50% or more hour, in two period of sub-frame, for example provide the gray level of hundreds of proportions by subtraction rather than the picture signal of minimal gray level (0%).When the gray level of received image signal greater than 50% the time, in of two period of sub-frame, provide for example less than the gray level of 100% several percentage points rather than the picture signal of maximum gray scale (100%).This gray level is distributed to the first period of sub-frame and the second period of sub-frame, so as to be provided at the gray level of the picture signal among of two period of sub-frame be provided at the picture signal in another period of sub-frame gray level half or lack than half.The gray level that is provided at the picture signal among of two period of sub-frame preferably be provided at the picture signal in another period of sub-frame gray level 10% or less, be 2% or less best, in order to effect of the present invention is provided.The gray level of the picture signal in being provided at of two period of sub-frame be provided at the picture signal in another period of sub-frame gray level 2% or more hour, for example, in 256 gray levels, only a gray level is offered in two period of sub-frame one.
Figure 60 is that explanation is according to the calcspar of the basic structure of the image display device of example 9 of the present invention.Will be with same reference number with identity element among Fig. 1, and will omit detailed description.
As shown in Figure 60, the image display device in the example 9 have basically with example 1 in identical structure, and mainly have any different in the following areas.Image display device in the example 9 comprises digital message entry system source electrode driver 13Da to 13Dd, rather than source electrode driver 13a to 13d, and comprise that the gamma light characteristic arranges transducer 21 (the gamma light characteristic arranges part), rather than temperature sensor IC 20.The gamma light characteristic arranges transducer 21 the gamma light characteristic is transformed to " 2.1 ", " 2.2 " or " 2.3 ".Image display device in the example 9 also comprises a controller LSI 40E, and it is used for utilizing the gamma light characteristic that transducer 21 conversion gamma light characteristics are set, thereby realizes showing control.In Figure 60, provide the gamma light characteristic that transducer 21 is set, rather than temperature sensor IC 20.Replacedly, can provide the gamma light characteristic that transducer 21 is set with temperature sensor IC 20.
Each receiving plane picture signal of digital message entry system source electrode driver 13Da to 13Dd is as digital displaying data, selects in the preset voltage one according to the value of each digital displaying data, and exports selected voltage as grayscale voltage.In the situation of for example 8-position input system source electrode driver, preset 256 grayscale voltages that can be output.According to one that is shown by the 8-bit digital of inputting in determined 256 values of data (0 to 255), each digital message entry system source electrode driver is selected by well-determined grayscale voltage.
Figure 61 is the calcspar of the structure of controller LSI 40E (such as display control section, shown in Figure 60).
As shown in Figure 61, controller LSI 40E comprises line buffer 41 (row data memory portion), timing controller 42 (timing controlled part), frame memory data selector 43 (frame memory data selection part), the first gradation conversion circuit 44E (the first gradation conversion part) that is used for receiving gamma light characteristic signalization, the second gradation conversion circuit 45E (the second gradation conversion part) that is used for reception gamma light characteristic signalization and output data selector 46 (output data selection part).
Line buffer 41 receives received image signal line by line, and temporary this received image signal.Line buffer 41 comprises receiving end and transmitting terminal independently, and therefore can receive simultaneously and transmitted signal.
Timing controller 42 control frame memory data selector switchs 43, frame memory 30 ground data transmit or the data from frame memory 30 read in order to alternately choose.Timing controller 42 is also controlled output data selector 46, exports from the data output of the first gradation conversion circuit 44 or from the data of the second gradation conversion circuit 45 in order to alternately select.In other words, timing controller 42 selects the first period of sub-frame or the second period of sub-frame to be used for output data selector 46, describes in detail such as the back.
Frame memory data selector 43 is by timing controller 42 controls, in order to alternately select data transmission or data to read.In data transfer procedure, the received image signal that frame memory data selector 43 will be stored in the line buffer 41 sends frame memory 30 line by line to.In data read process, frame memory data selector 43 is read that read before the frame period and received image signal one horizontal line that be stored in the frame memory 30 with connecing a horizontal line, and sends the data of reading to second gradation conversion circuit 45E.
According to look-up table, the grey level transition of the received image signal that the first gradation conversion circuit 44E will provide from line buffer 41 is for being used for the gray level of the first period of sub-frame.
According to look-up table, the grey level transition of the picture signal that the second gradation conversion circuit 45E will provide from frame data selector switch 43 is for being used for the gray level of the second period of sub-frame.
In example 9, the first gradation conversion circuit 44E and the second gradation conversion circuit 45E operate according to look-up table, and this look-up table is input value storage output valve.Select in the gray level in order to determine output valve according to the three types of look-up table, the type is to determine according to the gamma value that transducer 21 is set from the gamma light characteristic.Replacedly, can be by selecting calculation expression to obtain output valve by counting circuit.
Output data selector 46 is by timing controller 42 controls, in order to alternately select line by line from the picture signal of the first gradation conversion circuit 44E output the picture signal of perhaps exporting from the second gradation conversion circuit 45E.Output data selector 46 is exported selected picture signal as horizontal image signal.
In the operation of the image display device in the example 9 and the example 1 is in fact identical, except being uses digital message entry system source electrode driver 13Da to 13Dd, rather than outside the source electrode driver 13a to 13d, and will not be explained in detail herein.
In the example 9, period of sub-frame α is configured to the second period of sub-frame.Changed the gray level of this picture signal by the second gradation conversion circuit 45E, so that: when the gray level of received image signal is equal to or less than by well-determined threshold level, in period of sub-frame α, provide the picture signal of the gray level that is increased according to the gray level of received image signal or reduces; And when the gray level of received image signal greater than by well-determined threshold level the time, the picture signal of maximum gray scale is provided in period of sub-frame α.When the picture signal of maximum gray scale is provided, the gray level that is provided at the picture signal among of two period of sub-frame is equal to or less than half of the gray level that is provided at the image in another period of sub-frame, preferably be equal to or less than 10%, perhaps best is to be equal to or less than 2%.
Period of sub-frame β is configured to the first period of sub-frame.Change the gray level of this picture signal by the first gradation conversion circuit 44E, so that: when the gray level of received image signal is equal to or less than by well-determined threshold level, in period of sub-frame β, provide the picture signal of minimal gray level; And when the gray level of received image signal greater than by well-determined threshold level the time, the picture signal of maximum gray scale is provided in period of sub-frame α.When the picture signal of minimal gray level is provided, the gray level that is provided at the picture signal among of two period of sub-frame is equal to or less than half of the gray level that is provided at the image in another period of sub-frame, preferably be equal to or less than 10%, perhaps best is to be equal to or less than 2%.
Hereinafter, will describe how these gray levels are distributed to the first period of sub-frame and the second period of sub-frame.
In example 9, for the purpose of explaining, will use 9-bit digital input system source electrode driver, but specifically not limit the figure place of source electrode driver.Generally, use can show 8-position, 256 gray level ground input system source electrode driver.
According to the digital displaying data that is imported into source electrode driver 13Da to 13Dd, according to the relation between the voltage-light transmittance characteristic (V-T characteristic) of output gray level voltage and LCD panel 10, determine the intensity level of display board 10 (LCD panel).In example 9, source electrode driver 13Da to 13Dd is 5-bit digital input system, and this grayscale voltage is set, so that with respect to input digital data, the intensity level of LCD panel 10 is as shown in table 1.In other words, this reference voltage is set, so that the gamma light characteristic of source electrode driver 13Da to 13Dd is 2.2.
Table 1
The gamma light characteristic of source electrode driver
Driver input data (5) The intensity level of liquid crystal board (%)
0 0.00
1 3.80
2 4.45
3 5.15
4 7.80
5 8.85
6 10.00
7 11.00
8 13.30
9 14.65
10 17.70
[1097]
11 20.80
12 26.20
13 31.00
14 34.40
15 39.20
16 44.10
17 48.65
18 53.10
19 57.50
20 62.00
21 66.25
22 70.85
23 75.15
24 79.60
25 84.00
26 88.40
27 93.40
28 97.00
29 98.00
30 99.00
31 100.00
In example 9, utilize digital message entry system source electrode driver 13Da to 13Dd, according to the gray level of appropriate combination for the first period of sub-frame and the second period of sub-frame, change the gamma light characteristic of image display device.Consider the gamma light characteristic that mainly is used as traditionally the CRT of display device, the gamma value with 2.2 is exported most general pattern signal.In example 9, by the gamma light characteristic transducer 21 is set, gamma value (gamma light characteristic) can be elected " 2.1 ", " 2.2 " or " 2.3 " as.Therefore, can select the best gamma light characteristic for this screen, in order to watch easily the image on this screen.
Especially, according to gamma light characteristic signalization, in each of the first gradation conversion circuit 44E and the second gradation conversion circuit 45E, select three kinds of look-up tables (being used for the look-up table A of 2.2 gamma light characteristic, the look-up table C that is used for the look-up table B of 2.1 gamma light characteristic and is used for 2.3 gamma light characteristic) one, this gamma light characteristic signalization arranges the transducer 21 from the gamma light characteristic and sends.
Table 2 shows look-up table A (gamma light characteristic: the following corresponding relation 2.2): the gray level of received image signal, the numerical data of exporting to source electrode driver 13Da to 13Dd in the first and second period of sub-frame, the gray level in the first and second period of sub-frame and the corresponding relation between the time integral value (brightness of feeling) of display brightness during the first and second period of sub-frame.
Table 2
Look-up table A (gamma light characteristic: 2.2)
Represent the relation between the target brightness levels of the gray level of received image signal and image display device with following expression.
The target brightness levels of image display device=(gray level of received image signal) γ
Expression formula (100)
Wherein γ is the gamma light characteristic (by the gamma value of transducer 21 settings) of image display device.
The gray level and the relation between the time integral brightness during the first period of sub-frame and the second period of sub-frame (brightness of feeling) that represent to be provided at the picture signal in the first period of sub-frame and the second period of sub-frame with following expression.
Time integral brightness (brightness of feeling)
={ (gray level in the first period of sub-frame) D γ+(gray level in the second period of sub-frame) D γ}/2 expression formulas (101)
Wherein D γ=2.2 (the gamma light characteristic of source electrode driver).
Figure 62 shows 6 examples of the relation shown in the table 2 with different target brightness levels.
As shown in Figure 62, when the gray level of received image signal less than 50%, for example 25.81 o'clock, according to the gray level (being provided in the second period of sub-frame) of the gray level of received image signal with near the gray level in the minimal gray level (being provided in the first period of sub-frame), determine the brightness of feeling by combination.When the gray level of received image signal is equal to or greater than 50%, for example 74.19% or 83.67% the time, according to the gray level (being provided in the first period of sub-frame) of the gray level of received image signal with near the gray level in the maximum gray scale (being provided in the second period of sub-frame), determine the brightness of feeling by combination.
Table 3 shows above-described corresponding relation among the look-up table B, and table 4 shows above-described corresponding relation among the look-up table C.In these cases, expression formula (100) and (101) have been obtained.In look-up table B, γ=2.1.In look-up table C, γ=2.3.
Table 3
Look-up table A (gamma light characteristic 2.1)
Table 4
Look-up table A (gamma light characteristic 2.3)
Figure G2009101605373D01221
Data in the look-up table that uses in example 9 are selected like this so that with respect to the error of the gamma light characteristic that image display is arranged within ± 1.5%.
Figure 63 represents when using look-up table A to C, in the gray level of received image signal and the relation between the brightness (brightness that is felt) in the time integral during the first and second period of sub-frame.
As mentioned above, in example 9, the gray level of picture signal is changed like this by the first gradation conversion circuit 44E: when the gray level of received image signal is equal to or less than by well-determined threshold level, the picture signal of a gray level is provided, and its gray level according to received image signal increases or reduces; And when the gray level of received image signal during greater than described threshold level, provide near the picture signal of a gray level maximum gray scale.The gray level of picture signal is changed like this by the second gradation conversion circuit 45E: when the gray level of received image signal is equal to or less than by well-determined threshold level, provide near the picture signal of a gray level the minimal gray level.When the gray level of received image signal during greater than described threshold level, the picture signal of a gray level is provided, its gray level according to received image signal increases or reduces.Utilize this set, can change the gamma light characteristic of image display.In other words, gray level in the first and second period of sub-frame is made up suitably, so that can change the gamma light characteristic of image display, alleviate simultaneously motion blur, in order to improve the quality of the moving image of maintenance image display, and do not reduce the maximal value of the time integral brightness in any given frame period.
In example 9, increase or the picture signal of the gray level that reduces by means of respectively two period of sub-frame being provided according to received image signal, perhaps by means of the picture signal that respectively two period of sub-frame is provided near the gray level the maximum gray scale, and increase according to the gray level of received image signal or the picture signal of the gray level that reduces, can change the gamma light characteristic of image display.Thereby, can be controlled at the brightness of feeling during the frame period.Image display in example 9 can also be used for other purpose, for example, is used for the temperature of correcting liquid crystal display screen, perhaps is used for proofreading and correct gray level essential when using different liquid crystal materials to change the V-T characteristic.
(example 10)
In example 9, utilizing hardware is the image display control section that controller LSI provides image display at example 1.In example 10, utilize software that the image display control section of image display is provided.
Figure 64 is the block scheme of the structure of the image display control section that provided by a computing machine.
Shown in Figure 64, image display control section 40F comprises CPU (CPU (central processing unit)) 401 (control section), ROM 402 as computer-readable medium, this ROM402 storage display control program and the data of controlling for demonstration, described program is used for being carried out at example 1 to example 9 described method for displaying image by computing machine, and image display control section 40F also comprises the RAM 403 of the working storage that is used as CPU 401.
Operable computer-readable medium comprises memory storage, various types of IC storeies for example, hard disk (HD), CD (for example CD), and magnetic recording media (for example FD).Display control program and the data of storage are delivered to RAM 403 in ROM 402, and are carried out by CPU 401.
In order to show the image corresponding to a frame period, CPU 401 uses corresponding part to repeat following processing according to display control program of the present invention and data.
Be in the center or in time near the period of sub-frame at the center in a frame period, display screen 10 is provided at the picture signal of the maximum gray scale in the described scope, wherein the brightness value time integral brightness value in n period of sub-frame and that be no more than received image signal.(be in time the center or will be called as " central period of sub-frame " near the period of sub-frame at the center in a frame period.)
When the time integral brightness value of center period of sub-frame and when not reaching the brightness value of received image signal, in each period of sub-frame of the front and back of center period of sub-frame, display screen 10 is provided at maximum gray scale partial image signal in this scope, wherein the brightness value brightness value of the time integral in n period of sub-frame and that be no more than received image signal.(the front period of sub-frame in central period of sub-frame will be called as " period of sub-frame of front ", and the period of sub-frame in central period of sub-frame back will be called as " period of sub-frame afterwards ".)
When brightness value brightness value and that still be no more than received image signal of the time integral in the period of sub-frame of central period of sub-frame, front and period of sub-frame afterwards, each period of sub-frame before the period of sub-frame of front and the period of sub-frame period of sub-frame afterwards after are provided at the picture signal of the maximum gray scale in this scope to display screen 10, wherein the time integral intensity level of n period of sub-frame with the brightness value that is no more than input signal.
This operation is repeated, until be supplied to the brightness value interior time integral intensity level of all period of sub-frame and that reach received image signal of picture signal.At this moment, in remaining period of sub-frame, provide the picture signal of minimal gray level to display screen 10 or less than the picture signal of the gray level of a setting.
Perhaps, for the time integral value that utilizes the brightness value during n period of sub-frame with the image that shows corresponding to a frame period, CPU 401 is according to using corresponding part to repeat following processing according to display control program of the present invention and data.
N period of sub-frame from according to the time be the earliest period of sub-frame or from being the period of sub-frame the latest according to the time, be called as the first period of sub-frame, the second period of sub-frame ..., n period of sub-frame.According on the time two period of sub-frame close to the center be called as " m1 period of sub-frame " and " m2 period of sub-frame ".The m1 period of sub-frame is set to n/2, and the m2 period of sub-frame is set to n/2+1.N/2 threshold level is provided, and from the threshold level of minimum begin to be known as T1, T2 ..., T[n/2].
When the gray level of received image signal is equal to or less than T1, in each of m1 period of sub-frame and m2 period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10, and in other period of sub-frame, provide the picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined to display board 10.
When the gray level of received image signal greater than T1 and when being equal to or less than T2, in each of m1 period of sub-frame and m2 period of sub-frame, provide the picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to display board 10, in each of m1-1 period of sub-frame and m2+1 period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10, and in other period of sub-frame, provide the picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined to display board 10.
When the gray level of received image signal greater than T2 and when being equal to or less than T3, in the m1 period of sub-frame, the m2 period of sub-frame, in each of m1-1 period of sub-frame and m2+1 period of sub-frame, provide the picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to display board 10, in each of m1-2 period of sub-frame and m2+2 period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10, and in other period of sub-frame, provide the picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined to display board 10.
By this way, when the gray level of received image signal greater than Tx-1 (x is equal to or greater than 4 integer) and when being equal to or less than Tx, in each of [m1-(x-2)] period of sub-frame to the [m2+ (x-2)] period of sub-frame, provide the picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to display board 10, in each of [m1-(x-1)] period of sub-frame to the [m2+ (x-1)] period of sub-frame, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10, and in other period of sub-frame, provide the picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined to display board 10.
Replacedly, for the time integral value by asking brightness during two period of sub-frame and show picture signal corresponding to a frame period, CPU 401 utilizes corresponding part, based on display control program of the present invention and data, the process below repeating.
One in two period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β.When the gray level of received image signal is equal to or less than by well-determined threshold level, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10 in period of sub-frame α, and in period of sub-frame β, provides the picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined to display board 10.
When the gray level of received image signal during greater than this threshold level, in period of sub-frame α, provide the picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to display board 10, and the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10 in period of sub-frame β.
Replacedly, for the time integral value by asking brightness during two period of sub-frame and show picture signal corresponding to a frame period, CPU 401 utilizes corresponding part, based on according to display control program of the present invention and data, repeats following process.
One in two period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β.Stipulate threshold level T1 and the T2 of the gray level in two period of sub-frame.Threshold level T2 is greater than threshold level T1.
When the gray level of received image signal is equal to or less than threshold level T1, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10 in period of sub-frame α, and in period of sub-frame β, provides the picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined to display board 10.
When the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10 in period of sub-frame α, and in period of sub-frame β, provides according to the gray level of received image signal to display board 10 and be increased or picture signal that reduce and lower than the gray level that in period of sub-frame α, provides gray level.
When the gray level of received image signal during greater than threshold level T2, in period of sub-frame α, provide the picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to display board 10, and the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10 in period of sub-frame β.
Replacedly, for the time integral value by asking brightness during two period of sub-frame and show picture signal corresponding to a frame period, CPU 401 utilizes corresponding part, based on according to display control program of the present invention and data, repeats following process.
One in two period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β.Stipulate threshold level T1 and the T2 of the gray level in two period of sub-frame.Threshold level T2 is greater than threshold level T1.Threshold level L is determined by unique.
When the gray level of received image signal is equal to or less than threshold level T1, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10 in period of sub-frame α, and in period of sub-frame β, provides the picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined to display board 10.
When the gray level of received image signal greater than threshold level T1 and when being equal to or less than threshold level T2, the picture signal of gray level L is provided to display board 10 in period of sub-frame α, and the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10 in period of sub-frame β.
When the gray level of received image signal during greater than threshold level T2, the picture signal of the gray level that is increased according to the gray level of received image signal or reduces is provided to display board 10 in period of sub-frame α, and in period of sub-frame β, provides the picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to display board 10.
Replacedly, for the time integral value by asking brightness during two period of sub-frame and show picture signal corresponding to a frame period, CPU 401 utilizes corresponding part, based on according to display control program of the present invention and data, repeats following process.
One in two period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β.
Based on two two field pictures of continuous input, by estimating to produce the image of the state that mediates in time.
When the gray level of received image signal is equal to or less than by well-determined threshold level, in period of sub-frame α, provide the picture signal of the gray level that is increased according to the gray level of received image signal or reduces to display board 10.When the gray level of received image signal during greater than this threshold level, in period of sub-frame α, provide the picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to display board 10.
When the gray level of the picture signal of the state of mediating is equal to or less than this threshold level, in period of sub-frame β, provide the picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined to display board 10.When the gray level of the picture signal of the state of mediating during greater than this threshold level, in period of sub-frame β, provide according to the gray level of the picture signal of the state of mediating to display board 10 and be increased or the picture signal of the gray level that reduces.
Replacedly, for the time integral value by asking brightness during two period of sub-frame and show picture signal corresponding to a frame period, CPU 401 utilizes corresponding part, based on according to display control program of the present invention and data, repeats following process.
One in two period of sub-frame is known as period of sub-frame α, and another period of sub-frame is known as period of sub-frame β.
When the gray level of received image signal is equal to or less than by well-determined threshold level, in period of sub-frame α, provide the picture signal of the gray level that is increased according to the gray level of received image signal or reduces to display board 10.When the gray level of received image signal during greater than this threshold level, in period of sub-frame α, provide the picture signal of maximum gray scale or greater than the picture signal of the gray level of the value of defined to display board 10.
When the mean value of the gray level of the picture signal of input is equal to or less than this threshold level before the gray level of the picture signal in the current frame period and the frame or after the frame, in period of sub-frame β, provide the picture signal of minimal gray level or less than the picture signal of the gray level of the value of defined to display board 10.When this mean value during greater than this threshold level, in period of sub-frame β, provide the picture signal of the gray level that is increased according to this mean value or reduces to display board 10.
Adopt above-described implementation, can suppress the motion blur of moving image, be suppressed at simultaneously the minimizing of high-high brightness or contrast aspect.
(example 11)
In example 11 of the present invention, description is utilized the image display device described in any one of example 1 to 10 and the liquid crystal TV of method for displaying image.
Figure 65 is the calcspar of the structure of liquid crystal TV 1000 in the example 11.
As shown in Figure 65, liquid crystal TV 1000 comprises the image display device 1 described in any one of example 1 to 10, and the tuner pack 1001 that is used for selecting the channel of TV broadcast singal.Be input to the controller LSI 40 of image display device 1 as picture signal by the TV broadcast singal of the selected channel of tuner pack 1001.
Adopt this structure, liquid crystal TV 1000 shows that the motion blur with repressed moving image has suppressed the high-quality image of the minimizing aspect high-high brightness or contrast simultaneously.
(example 12)
In example 12 of the present invention, description is utilized the image display device described in any one of example 1 to 10 and the liquid crystal monitoring apparatus medium of method for displaying image.
Figure 66 is the calcspar of the structure of liquid crystal monitoring apparatus medium 2000 in the example 12.
As shown in Figure 66, liquid crystal monitoring apparatus medium 2000 comprises the image display device 1 described in any one of example 1 to 10, and for the treatment of the signal processing 2001 from the monitor signal of personal computer (PC) or other external unit.Be input to the controller LSI 40 of image display device 1 as picture signal from the monitor signal of signal processing 2001.
Adopt this structure, liquid crystal monitoring apparatus medium 2000 shows that the motion blur with repressed moving image has suppressed the high-quality image of the minimizing aspect high-high brightness or contrast simultaneously.
In example 1, on each of the pixel portion on this screen, realize showing control.Also be in example 2 to 9, on each of the pixel portion on this screen, realize showing control.
In example 1 to 12, exist in the situation of three or more period of sub-frame, the gray level that is assigned to the central period of sub-frame in the frame period is higher than the gray level that is assigned to other period of sub-frame.The intensity level that is assigned to the central period of sub-frame in the frame period is higher than the intensity level that is assigned to other period of sub-frame.Moved within a frame period in center in the center of gravity of time integral brightness during a plurality of period of sub-frame.
In example 1 to 12, adopt a frame period that is divided into two or three period of sub-frame, realize showing control.The present invention is not limited to this, but can be used for adopting a frame period that is divided into a plurality of (being equal to or greater than 2 integer) period of sub-frame, realizes showing control.Hereinafter, use description to the several different methods of distributing to a plurality of period of sub-frame for the intensity level of received image signal with being assumed to be.Adjustment is provided at the gray level of this period of sub-frame, in order to realize being assumed to be the intensity level for received image signal.
In the following description, for the sake of clarity, distribute the gray level of received image signal, so that this gray level little by little is increased to the level of defined.According to the present invention, by, for example, utilize look-up table etc. based on calculating or conversion according to the allocation scheme of the gray level of received image signal, realize in fact instantaneously this distribution.
Figure 67 to 71 has illustrated and has been used for will being assumed to be the conceptual view of distributing to the several different methods of a plurality of period of sub-frame for the intensity level of received image signal according to image display device of the present invention.In Figure 67 to 71, a frame comprises a plurality of period of sub-frame.Each bar shaped represents a period of sub-frame.This intensity level will be assigned to the represented period of sub-frame in some zone, and determine to be assigned to the intensity level with the represented period of sub-frame of shade.
In Figure 67 (a), a frame is divided into n period of sub-frame, and wherein " n " is equal to or greater than 2 integer." n " comprises odd number, but in this example, a frame is divided into 6 period of sub-frame.As shown in the Far Left part of Figure 67 (a), the period of sub-frame that is in time state center or time of closest approach state center from a frame period that is used for image demonstration (represented with point) begins, and distributes the gray level that is assumed to be for received image signal.(in this example, from distribution that begins this intensity level in the left side of two period of sub-frame at time of closest approach state center, but also can begin this distribution from one on the right of two period of sub-frame at time of closest approach state center.) as shown in begin from left-hand component second of Figure 67 (a), when adopting this intensity level (as represented with shade) this period of sub-frame of filling, this intensity level is distributed near one on the right of two period of sub-frame of this time state center (represented with point).Shown in the middle body of Figure 67 (a), when adopting this intensity level (as represented with shade) this period of sub-frame of filling, with this intensity level distribute to near the adjacent period of sub-frame in the left side on one on the left side of two period of sub-frame of this time state center (represented with point).As shown in begin from right-hand component second of Figure 67 (a), when adopting this intensity level (as represented with shade) this period of sub-frame of filling, with this intensity level distribute to near the adjacent period of sub-frame in the right on one on the right of two period of sub-frame of this time state center (represented with point).Repeat this operation, distribute to this period of sub-frame in order to will be assumed to be for the intensity level of received image signal.To remain intensity level and distribute to the residue period of sub-frame, the intensity level of distributing with toilet equates with being assumed to be the whole intensity level to received image signal.Therefore, finish this distribution.
In Figure 67 (b), a frame is divided into n period of sub-frame, and wherein " n " is equal to or greater than 3 odd number.In this example, a frame is divided into 5 period of sub-frame.As shown in the left-hand component of Figure 67 (b), from being in period of sub-frame (begin from the left side in this example the 3rd) beginning for the time state center in frame period of picture signal (represented with point), distribute the gray level that is assumed to be for received image signal.Being used for will be corresponding to being assumed to be that the reference value of distributing to the second period of sub-frame for the gray level of the intensity level of received image signal is a threshold level (following detailed description).At this moment, the gray level of received image signal＜threshold level T1.Shown in the middle body of Figure 67 (b), when (represented such as the usefulness shade with this intensity level; When threshold level T1) filling this central authorities period of sub-frame, this intensity level is distributed to simultaneously the period of sub-frame (as represented with point) on the left side of the period of sub-frame on the right of central period of sub-frame and central period of sub-frame.At this moment, the gray level of threshold level T1＜received image signal level＜threshold level T2.As shown in the right-hand component of Figure 67 (b), when adopting this intensity level (as represented with shade; Threshold level T2) when filling these period of sub-frame, this period of sub-frame is distributed to the period of sub-frame adjacent with the left side of these period of sub-frame and the period of sub-frame adjacent with the right of these period of sub-frame (as using point represented).At this moment, the gray level of threshold level T2＜received image signal.Repeat this operation.Especially, be threshold level T1 to fill the gray level corresponding to this intensity level of distributing till the central period of sub-frame with this intensity level.Threshold level T2 to filling the gray level corresponding to this intensity level of distributing till the period of sub-frame adjacent with the right with the left side of central period of sub-frame with this intensity level.Owing to increased several period of sub-frame, so also increased several threshold levels.By threshold level T1 and T2 are provided, consider this control, when distributing this intensity level, can make very soon definite.
In Figure 67 (c), a frame is divided into n period of sub-frame, and wherein " n " is equal to or greater than 2 even number.In this example, a frame is divided into 6 period of sub-frame.As shown in the left-hand component of Figure 67 (c), two period of sub-frame of (begin from the left side in this example the 3rd and the 4th) begin from the time state center that is in a frame period that is used for picture signal simultaneously, distribute the intensity level (as represented with putting) that is assumed to be for received image signal.At this moment, the gray level of received image signal＜threshold level T1.Shown in the middle body of Figure 67 (c), when adopting this intensity level (represented with shade; Threshold level T1) when filling these central period of sub-frame, this intensity level is distributed to the period of sub-frame adjacent with the left side with the right of these central period of sub-frame (in this example second and the 5th simultaneously; Represented with point).At this moment, the gray level of threshold level T1＜received image signal＜threshold level T2.As shown in the right of Figure 67 (c), when adopting this intensity level (represented with shade; Threshold level T2) when filling these period of sub-frame, this intensity level is assigned to the period of sub-frame adjacent with the period of sub-frame on the left side of these period of sub-frame and the right (in this example Far Left and rightmost period of sub-frame; Represented with point).At this moment, the gray level of threshold level T2＜received image signal.Repeat this operation.
In Figure 67 (d), a frame is divided into two period of sub-frame.Being used for will be corresponding to being assumed to be that the reference value of distributing to this period of sub-frame for the gray level of the intensity level of received image signal is threshold level T (following described in detail).As shown in the left-hand component of Figure 67 (d), since (a left side in this example of two period of sub-frame; Represented with point), distribute the intensity level that is assumed to be for received image signal.At this moment, the gray level of received image signal＜threshold level T.As shown in the right-hand component of Figure 67 (d), when adopting this intensity level (represented with shade; When threshold level T) filling this left side period of sub-frame, this intensity level is assigned to this right period of sub-frame (represented with point).At this moment, the gray level of threshold level T＜received image signal.Threshold level T corresponding to the gray level that can be assigned to one intensity level in this period of sub-frame.
In Figure 68 (e), a frame is divided into two period of sub-frame.Being used for will be corresponding to being assumed to be that the reference value of distributing to this period of sub-frame for the gray level of the intensity level of received image signal is threshold level T1 and T2.As shown in the left-hand component of Figure 68 (e), from of two period of sub-frame (on the left side of this example; Represented with point) beginning, distribute the intensity level that is assumed to be for received image signal.At this moment, the gray level of received image signal＜threshold level T1.As shown in the middle body of Figure 68 (e), when when being assumed to be that gray level for the intensity level of received image signal reaches the threshold level T1 of left side period of sub-frame, also this intensity level is distributed to the right period of sub-frame (as represented with point), and distributed to left side period of sub-frame.At this moment, the gray level of threshold level T1＜received image signal＜threshold level T2.As shown in the right-hand component of Figure 68 (e), when when being assumed to be that gray level for the intensity level of received image signal reaches the threshold level T2 of left side period of sub-frame, to remain intensity level and distribute to the right period of sub-frame (as represented with point), and finish this distribution.At this moment, the gray level of threshold level T2＜received image signal.
In Figure 68 (f), a frame is divided into two period of sub-frame.Being used for will be corresponding to being assumed to be that the reference value of distributing to this period of sub-frame for the gray level of the intensity level of received image signal is threshold level T1 and T2.As shown in the left-hand component of Figure 68 (f), from (a left side in this example of two period of sub-frame; As represented with point) beginning, distribute the intensity level that is assumed to be for received image signal.At this moment, the gray level of received image signal＜threshold level T1.As shown in the middle body of Figure 68 (f), when corresponding to being assumed to be that the gray level for the intensity level of received image signal reaches the threshold level T1 of left side period of sub-frame, temporarily fixedly be assigned to the intensity level of left side period of sub-frame (namely, suspend this distribution), and will be assumed to be for the intensity level of received image signal and distribute to other period of sub-frame (the right in this example; As using point represented).At this moment, the gray level of threshold level T1＜received image signal＜threshold level T2.As shown in the right-hand component of Figure 68 (f), when when being assumed to be that gray level for the intensity level of received image signal reaches the threshold level T2 of the right period of sub-frame, discharge from this stationary state and to be assigned to the intensity level of left side period of sub-frame, and will remain intensity level and distribute to left side period of sub-frame (as represented with putting).Therefore, finish this distribution.At this moment, the gray level of threshold level T2＜received image signal.By this way, get the mean value at center of the center of gravity of brightness.
In Figure 68 (g), a frame is divided into two period of sub-frame.Being used for will be corresponding to being assumed to be that the reference value of distributing to this period of sub-frame for the gray level of the intensity level of received image signal is threshold level T.As shown in the left-hand component of Figure 68 (g), (be the left side in this example from of two period of sub-frame; As represented with point) beginning, distribute the intensity level that is assumed to be for received image signal.At this moment, the gray level of received image signal＜threshold level T.As shown in the right-hand component of Figure 68 (g), when when being assumed to be that gray level for the intensity level of received image signal reaches the threshold level T of left side period of sub-frame, make the intensity level of left side period of sub-frame maximum, consider simultaneously the image state of next frame, an intensity level is distributed to the right period of sub-frame.Especially, detect between the image of current input and the image that then will be transfused to whether distinct (that is, motion).When distinct, to remain intensity level and distribute to the right period of sub-frame, so that the intensity level of the right period of sub-frame is the intensity level for received image signal of being assumed to be of (that is, estimating the image between two images) state that mediates in time between the image of current input and the image that then will be transfused to.Then, fill left side period of sub-frame with this intensity level (threshold level T).At this moment, the gray level of threshold level T＜received image signal.By this way, suppress the generation of false profile.
In Figure 68 (h), a frame is divided into two period of sub-frame.Being used for will be corresponding to being assumed to be that the reference value of distributing to this period of sub-frame for the gray level of the intensity level of received image signal is threshold level T.As shown in the left-hand component of Figure 68 (h), from (a left side in this example of two period of sub-frame; As represented with point) beginning, distribute the intensity level that is assumed to be for received image signal.At this moment, the gray level of received image signal＜threshold level T.As shown in the right-hand component of Figure 68 (h), when when being assumed to be that gray level for the intensity level of received image signal reaches the threshold level T of left side period of sub-frame, make the intensity level that is assigned to left side period of sub-frame maximum.Simultaneously, calculate the image of current input and the mean value of the image that then will be transfused to, and, being assumed to be for the residue intensity level of received image signal of this mean value distributed to residue period of sub-frame (being in this example the right).Then, fill left side period of sub-frame with this intensity level (threshold level T).At this moment, the gray level of threshold level T＜received image signal.
Figure 69 (i) shows the situation that period of sub-frame has different length.Figure 69 (j) shows the situation that period of sub-frame has equal length.Because the Length Ratio of period of sub-frame is shorter, so obtained higher pulse effects.When period of sub-frame was long, the center of the center of gravity of brightness was tending towards more approaching long period of sub-frame, and is not easy motion.Because this specific character, so pass through, for example, at assigned position (for example, be in the period of sub-frame at the time state center in a frame period) on increase or reduce a period of sub-frame, can change effect and pulse effects that the center of the center of gravity of brightness provides.Figure 69 (i) can be used for Figure 67 (a) can be used for Figure 67 (b) to 68 (h) Figure 69 (j)
In Figure 69 (k), except following aspect, distribution method is in fact identical with Figure 68's (e).Operation except among Figure 68 (e) also distributes this intensity level, so as to be assigned to gray level or the intensity level of left side period of sub-frame and be assigned to the right period of sub-frame gray level or the difference between the intensity level be constant.This will specifically describe below.
One frame is divided into two subframes.Being used for will be corresponding to being assumed to be that the reference value of distributing to this period of sub-frame for the gray level of the intensity level of received image signal is threshold level T1 and T2.As shown in the left-hand component of Figure 69 (k), from (a left side in this example of two period of sub-frame; As represented with point) beginning, distribute the intensity level that is assumed to be for received image signal.At this moment, the gray level of received image signal＜threshold level T1.As shown in the middle body of Figure 69 (k), when when being assumed to be that gray level for the intensity level of received image signal reaches the threshold level T1 of left side period of sub-frame, also this intensity level is distributed to the right period of sub-frame (as represented with point).In more detail, with identical speed, left side period of sub-frame and the right period of sub-frame being distributed in this brightness simultaneously, is constant in order to be assigned to gray level or the difference between the intensity level of left side period of sub-frame and the right period of sub-frame.At this moment, the gray level of threshold level T1＜received image signal＜threshold level T2.As shown in the right-hand component of Figure 69 (k), when when being assumed to be that gray level for the intensity level of received image signal reaches the threshold level T2 of left side period of sub-frame, to remain intensity level and distribute to the right period of sub-frame (as represented with point), and finish distribution.At this moment, the gray level of threshold level T2＜received image signal＜threshold level T1.
In Figure 69 (l), except following aspect, distribution method is in fact identical with Figure 69's (k).This intensity level is assigned to left side period of sub-frame and the right period of sub-frame, in order to be assigned to gray level or the intensity level of left side period of sub-frame and be assigned to the right gray level of period of sub-frame or the difference between the intensity level is according to the function of defined.This function has the constant value such as the difference in the situation of Figure 69 (k), and has the value that obtains by the multiplication with this constant value and defined, and the coefficient of this regulation has been stipulated the allocation scheme of intensity level.Figure 69 (l) can be used for Figure 68 (e) and Figure 68 (f).
Figure 70 (m) is the figure about the response speed of liquid crystal material.For in response time of the increase of brightness and the liquid crystal material situation different for the response time of the minimizing of brightness, inspection is to distribute since the first period of sub-frame or since the second period of sub-frame, in order to less infringement is provided at liquid crystal material.In this example, when liquid crystal material for the response time＞liquid crystal material of the increase of brightness during for response time of the minimizing of brightness, the distribution of intensity level is since the second period of sub-frame.When liquid crystal material for the response time＜liquid crystal material of the increase of brightness during for response time of the minimizing of brightness, the distribution of intensity level is since the first period of sub-frame.Figure 70 (m) can be applied to Figure 67 (d) to 68 (h).
Here, Figure 70 (m) is applied to Figure 67 (d).When liquid crystal material during for response time of the minimizing of brightness, is assumed to be that the intensity level for received image signal is assigned with (shown in point) since second (right side) period of sub-frame in the middle of two period of sub-frame for the response time＞liquid crystal material of the increase of brightness.At this moment, the gray level of received image signal＜threshold level T.When the second period of sub-frame was filled by intensity level, intensity level was assigned to first (left side) period of sub-frame (the usefulness point is represented).At this moment, the gray level of threshold level T＜received image signal.When liquid crystal material during for response time of the minimizing of brightness, is assumed to be that the intensity level for received image signal is assigned with (shown in point) since first (left side) period of sub-frame in the middle of two period of sub-frame for the response time＜liquid crystal material of the increase of brightness.At this moment, the gray level of received image signal＜threshold level T.When the first period of sub-frame was filled by intensity level, intensity level was assigned to second (right side) period of sub-frame (the usefulness point is represented).At this moment, the gray level of threshold level T＜received image signal.
Figure 70 (n) is the response speed of display element.The maximum brightness level of display element is Lmax, and the minimum brightness level of display element is Lmin.At display element in the response time from Lmax to Lmin and the display element situation different for the response time from Lmin to Lmax, inspection is to distribute since the first period of sub-frame or since the second period of sub-frame, in order to less infringement is provided.In this example, when display element for the response time＞display element of the brightness transition of (brightness increase) from Lmin to Lmax during for response time of the brightness transition of (brightness reduces) from Lmax to Lmin, the distribution of intensity level is since the second period of sub-frame.When display element for the response time＜display element of the brightness transition of (brightness increase) from Lmin to Lmax during for response time of the brightness transition of (brightness reduces) from Lmax to Lmin, the distribution of intensity level is since the first period of sub-frame.Figure 70 (n) can be applicable to Figure 67 (d) to 68 (h).
In Figure 70 (o), the upper limit L corresponding to the gray level of the intensity level that will be assigned to period of sub-frame is set.Figure 70 (o) can be applicable to Figure 67 (a) to Figure 68 (h).
For example, as in the situation of Figure 67 (d), a frame is divided into two period of sub-frame.Be used for distributing to period of sub-frame the reference value of gray level, it is threshold level T corresponding to the intensity level that is assumed to be for received image signal.Be assumed to be for the intensity level of received image signal and be assigned with (shown in point) since of two period of sub-frame.At this moment, the gray level of received image signal＜threshold level T.When (represented with shade when reaching upper limit L corresponding to being assumed to be gray level for the intensity level of received image signal; Threshold level T), intensity level is assigned to another period of sub-frame (the usefulness point is represented).At this moment, the gray level of threshold level T＜received image signal.
In Figure 70 (p), be provided for upper limit L1, L2 and L3 corresponding to the gray level of the intensity level that will be assigned to period of sub-frame.Along with period of sub-frame more near the temporal center in a frame period, make upper limit L1, L2 and L3 higher.Figure 70 (p) can be applicable to Figure 67 (a) to 67 (c).
For example in the situation of Figure 67 (b), a frame is divided into n period of sub-frame, and wherein " n " is 3 or larger odd number.In this example, a frame is divided into 5 period of sub-frame.From the period of sub-frame at the temporal center that is in a frame period (in this example from third left), distribute the intensity level that is assumed to be for received image signal, show (represented with point) in order to carry out image.At this moment, the gray level of received image signal＜threshold level T1.When reaching the highest upper limit L1, the gray level corresponding to the intensity level in the period of sub-frame of center (use shade represented; Threshold level T1) time, intensity level is distributed to the period of sub-frame (represented with point) on the left side of the period of sub-frame on the right of center period of sub-frame and center period of sub-frame simultaneously.At this moment, the gray level of threshold level T1＜received image signal＜threshold level T2.It is (represented with shade when the gray level corresponding to the intensity level in these period of sub-frame reaches the second the highest upper limit L2; Threshold level T2), this intensity level is assigned to the period of sub-frame (represented with point) on the right side of the period of sub-frame on the left side of these period of sub-frame and these period of sub-frame, until reach minimum upper limit L3 corresponding to the gray level of the intensity level of these period of sub-frame.At this moment, the gray level of threshold level T2＜received image signal.Upper limit L3＜upper limit L2＜upper limit L1.
In Figure 71 (q), be provided for upper limit L1 and L2 corresponding to the gray level that will be assigned to period of sub-frame, so that upper limit L1 is greater than upper limit L2.Figure 71 (q) can be applicable to Figure 67 (d) to Figure 68 (h).
For example, in the situation of Figure 67 (d), a frame is divided into two period of sub-frame.Being used for period of sub-frame is distributed the reference value of gray level is threshold level T, and it is corresponding to the intensity level that is assumed to be for received image signal.Be assumed to be for the intensity level of received image signal and be assigned with (shown in point) since of two period of sub-frame.At this moment, the gray level of received image signal＜threshold level T.When (represented with shade when being assumed to be that gray level for the intensity level of received image signal reaches higher upper limit L1; Threshold level T), intensity level is assigned to the period of sub-frame on the right, until intensity level reaches lower upper limit L2 (represented with point).At this moment, the gray level of threshold level T＜received image signal.Lower upper limit L2＞higher upper limit L1.
By the upper limit L to Figure 71 (q) such as Figure 70 (o) is provided, even when the gray level of received image signal is maximum, the intensity level in all period of sub-frame can not become 100%.Thereby, utilize minimum (brightness) insertion system, pulse effects can be provided.In along with the period of sub-frame situation that more center on the time to approach and higher limit are higher, the center that is centered close to of the center of gravity of brightness.
In Figure 71 (r), remove following outside, distribution method is identical with Figure 67 (a) basically.Intensity level in each period of sub-frame is arranged like this, so that be assumed to be that the relation table between the brightness of the intensity level of received image signal and time integral illustrates the gamma light characteristic.
More particularly, distributing to the intensity level of each period of sub-frame is determined like this: the quantity that is assigned to the period of sub-frame of intensity level increases or reduces according to the gray level of received image signal, and the time integral brightness in a frame period is always expressed suitable gamma light characteristic with respect to the gray level of received image signal.
In Figure 71 (s), remove outside the operation of 71 (r), be provided as like this gray level of each period of sub-frame being distributed the reference of intensity level, so that the time integral brightness in a frame period always shows suitable gamma light characteristic with respect to the gray level of received image signal.
According to the present invention, can provide following effect in for example image display field, described image display uses handheld image display, for example liquid crystal display or EL display device: suppress the minimizing of high-high brightness and contrast; By the deteriorated of quality that cause reduces to minimum according to the time state center of the center of gravity of the gray level display brightness of received image signal is different; And the quality deterioration of the moving image that is represented by afterimage and motion blur reduced to minimum, keep simultaneously representing according to gray scale and produced like this so that be output to the compatibility of the picture signal of the image display with common gamma light characteristic.
In situation about not departing from the scope of the present invention with spirit, will understand, those skilled in the art can easily make various changes.Thereby, be not intended to explanation that the circumscription of additional claim is set forth in this place, but claim should be given wide in range explanation.

Claims (6)

1. image display device, be used for by being divided into a plurality of period of sub-frame a frame period, determining the gray level of each period of sub-frame and determined gray level is offered image displaying part according to the gray level of received image signal, the realization image shows that this image display device comprises:
Display control section, wherein display control section offers the relatively maximum gray level in relatively central period of sub-frame at the time state center in one frame period, this relatively central period of sub-frame is at the time state center or the most nearby, and constantly provides the gray level that is lowered continuously in the period of sub-frame away from the relative period of sub-frame of central authorities at one; And
When the gray scale of described received image signal relatively hour, display control section offers all period of sub-frame with relatively minimum gray level.
2. according to the image display device of claim 1, wherein:
When the gray scale of received image signal was relatively maximum, display control section offered all period of sub-frame with relatively maximum gray level.
3. according to the image display device of claim 1, wherein: by be provided to the gray level in each period of sub-frame by image displaying part control, display control section realizes that image shows, so that the light characteristic of feeling corresponding to the time integral value representation of the brightness of received image signal.
4. according to the image display device of claim 2, wherein: by be provided to the gray level in each period of sub-frame by image displaying part control, display control section realizes that image shows, so that the light characteristic of feeling corresponding to the time integral value representation of the brightness of received image signal.
5. image display device, be used for by ask n period of sub-frame the time integral value that is displayed on the brightness in the image displaying part and, realize the image demonstration of a frame, wherein n is the integer more than or equal to 2, this image display device comprises:
The image control part is used for realizing that in image displaying part the image of n period of sub-frame shows control in each frame period, wherein:
In relatively central period of sub-frame, namely in the time state center or the time of closest approach state center that are used for the frame period that image shows, display control section be provided to image displaying part n the brightness in the period of sub-frame integrated value with do not have above the picture signal corresponding to a relative maximum gray scale in the scope of the intensity level of the gray level of received image signal;
When the time integral value of the brightness in the period of sub-frame in relative central authorities and when not reaching intensity level corresponding to the gray level of received image signal, in each of the period of sub-frame of the front before central period of sub-frame and the period of sub-frame afterwards after central period of sub-frame, display control section be provided to image displaying part n the brightness in the period of sub-frame time integral value with the picture signal that does not have to surpass corresponding to the relative maximum gray scale in the scope of the intensity level of the gray level of received image signal;
When the time integral value of brightness in the period of sub-frame of relatively period of sub-frame, the front of central authorities and period of sub-frame afterwards and when not reaching yet intensity level corresponding to the gray level of input picture, in period of sub-frame before the period of sub-frame in front and each of the period of sub-frame period of sub-frame afterwards after, display control section be provided to image displaying part the brightness in this n period of sub-frame time integral value with do not have above the picture signal corresponding to the gray level of a relative maximum in the scope of the intensity level of the gray level of received image signal;
Display control section repeats this operation, until the time integral value of the brightness in all period of sub-frame of this picture signal are provided and reach intensity level corresponding to the gray level of received image signal; And
When this with when reaching intensity level corresponding to the gray level of received image signal, display control section provides the picture signal of relatively minimum gray level or is lower than the picture signal of gray level of the value of defined to image displaying part in the residue period of sub-frame; And
When the gray scale of described received image signal relatively hour, display control section offers all period of sub-frame with relatively minimum gray level.
6. method for displaying image, be used for by asking the brightness in the image displaying part that is displayed on period of sub-frame time integral value and, realize that the image of a frame shows, wherein n be one more than or equal to 2 integer, the method comprises the steps:
Be used for frame period that image shows be positioned at the time state center or near the relatively period of sub-frame of central authorities at this time state center, this step is provided at the picture signal of a relative maximum gray scale in the scope to image displaying part, the time integral value of the brightness in this scope in n period of sub-frame and be no more than intensity level corresponding to the gray level of a received image signal;
When the time integral value of the brightness in the period of sub-frame in relative central authorities and when not reaching intensity level corresponding to the gray level of received image signal, in each of period of sub-frame afterwards after the period of sub-frame of the front before the period of sub-frame of relative central authorities and the period of sub-frame in relative central authorities, this step is provided at the picture signal of a relative maximum gray scale in the scope to image displaying part, the time integral value of the brightness in this scope in n period of sub-frame and be no more than intensity level corresponding to received image signal;
When the time integral value of the period of sub-frame of relatively period of sub-frame, the front of central authorities and the brightness in the period of sub-frame afterwards and when still not reaching gray level corresponding to received image signal, in period of sub-frame before the period of sub-frame in front and each of the period of sub-frame after period of sub-frame afterwards, this step is provided at the picture signal of a relative maximum gray scale in the scope to image displaying part, the time integral value of the brightness in this scope in n period of sub-frame and be no more than intensity level corresponding to the gray level of received image signal;
This step repeats this operation, until the time integral value of the brightness in all period of sub-frame of the picture signal that provides and reach intensity level corresponding to the gray level of received image signal; And
When this with when reaching intensity level corresponding to the gray level of received image signal, this step provides the picture signal of relative minimal gray level or less than the picture signal of the gray level of the value of defined to image displaying part in the residue period of sub-frame; And
When the gray scale of described received image signal relatively hour, display control section offers all period of sub-frame with relatively minimum gray level.
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