CN1781137A - Liquid crystal television receiver, liquid crystal display control method, program thereof, and recording medium - Google Patents

Liquid crystal television receiver, liquid crystal display control method, program thereof, and recording medium Download PDF

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CN1781137A
CN1781137A CN 200480011738 CN200480011738A CN1781137A CN 1781137 A CN1781137 A CN 1781137A CN 200480011738 CN200480011738 CN 200480011738 CN 200480011738 A CN200480011738 A CN 200480011738A CN 1781137 A CN1781137 A CN 1781137A
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emphasizing
view data
input image
data
temperature
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CN100466052C (en
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藤根俊之
长田俊彦
菊地雄二
吉井隆司
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Sharp Corp
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Sharp Corp
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Abstract

When a video signal type detection section detects a video signal of the PAL method or the SECAM method (50Hz), it subjects the input image data to emphasis conversion processing with a smaller emphasis conversion degree than the NTSC method (60Hz), thereby improving the liquid crystal response speed, preventing generation of a video noise by excessive emphasis, and suppressing the image deterioration. As a result, it is possible to perform emphasis conversion for the input image data so as to compensate the optical response characteristic of the liquid crystal display panel and to prevent generation of a video noise by an excessive emphasis conversion for the image data of the PAL method or the SECAM method (50 Hz), thereby displaying a high-quality image.

Description

Liquid crystal TV set, liquid crystal display control method and program thereof and recording medium
Technical field
The present invention relates to use the liquid crystal TV set of display panels display image, particularly can improve the liquid crystal TV set of the optical response of display panels.
Background technology
In recent years, because lightweight, the slimming of products such as personal computer and televisor, display device also is required lightweight, slimming, has developed the such flat display of liquid crystal indicator (LCD) of alternative cathode ray tube (CRT) according to such requirement.
LCD applies electric field on the liquid crystal layer with anisotropic specific inductive capacity that injects between 2 substrates, regulate the intensity of this electric field, by regulating the light quantity that sees through substrate, obtains the display device of desirable vision signal.Such LCD is the mainstream product in the flat display easy to carry, the wherein main TFT LCD that uses as on-off element with thin film transistor (TFT) (TFT) that uses.
Recently, LCD is not only as the display equipment of computing machine, and is widely used as the display equipment of televisor, therefore increased the necessity that realizes dynamic image.But existing LCD exists owing to answering slow the causing of speed to realize the such shortcoming of dynamic image difficulty.
For improving such response speed of liquid crystal, known method has, according to the combination of the incoming video signal of incoming video signal before 1 frame and present frame, (overshoot) driving voltage that the grayscale voltage of incoming video signal that is compared to the present frame that is predetermined is high or offer the LCD drive method (for example Japanese kokai publication hei 4-365094 communique) of display panels than its low (dashing down) driving voltage.Below in this manual this type of drive being defined as overshoot (OS) drives.
In addition, as everyone knows, the relation of response speed of liquid crystal and temperature is very close, often the response speed with grey scale change is controlled in optimum condition, even the temperature of display panels changes, also therefore do not damage display quality, such Liquid crystal display board driving mchanism is documented in for example Japanese kokai publication hei 4-318516 communique.
Figure 15～Figure 19 just to carry out the situation that overshoot drives and describes in order according to the environment for use temperature optical response of display panels to be compensated like this.Here, Figure 15 is the block scheme of the key structure of existing liquid crystal indicator, Figure 16 is the key diagram of the content example of expression OS table memory, Figure 17 is the functional-block diagram of the schematic configuration of expression control CPU, Figure 18 is the temperature and key diagram with reference to the relation of table memory in the indication device, and Figure 19 is the key diagram of the relation of the expression response that puts on the voltage of liquid crystal and liquid crystal.
Among Figure 15,1a～1d is the OS table memory (ROM) that will be stored corresponding to the OS parameter (emphasizing transformation parameter) of the grey scale change before and after 1 image duration of input image data according to the temperature in each device, the 15th, the frame memory (FM) that 1 frame input image data is stored, 14H compares the M frame input image data (Current Data) that after this shows with the M-1 frame input image data (Previous Data) that is stored in frame memory 15, to determine the M two field picture to show the needed transformation component of emphasizing of emphasizing transform data (writing gradation data) according to this OS parameter corresponding to reading in some from OS table memory (ROM) 1a～1d of the OS parameter of this comparative result (grey scale change).
In addition, the 16th, basis is from emphasizing the transform data of emphasizing of transformation component 14H, liquid crystal driving signal is outputed to the gate drivers 18 of display panels 17 and the liquid-crystal controller of source electrode driver 19, the 20th, detect the temperature sensor that the temperature in this device is used, 12H is according to the temperature of using in the temperature sensor 20 detected devices, select some among OS table memory (ROM) 1a～1d to carry out reference, switching is used in the switch-over control signal that the OS parameter of emphasizing conversion of view data is used, is transferred to the control CPU that emphasizes transformation component 14H.
Here, the OS parameter L EVEL1～LEVEL4 that is stored in OS table memory (ROM) 1a～1d is at each reference temperature T1, T2, T3, T4 (under the environment of T1＜T2＜T3＜T4), according to the parameter that the measured value of the optical response of display panels 17 obtains in advance, emphasize that respectively the conversion degree has the relation of LEVEL1＞LEVEL2＞LEVEL3＞LEVEL4.
In addition, at for example shows signal level number, be that the video data number is under 8 the situation of 256 gray shade scales, in OS table memory (ROM) 1a～1d, also can have OS parameter (measured value) for whole 256 gray shade scales, but for example as shown in Figure 16, only store 9 * 9 OS parameters (measured value) in advance for 9 representative gray scales of per 32 gray shade scales, the transform data of emphasizing in addition gray scale, can utilize computings such as linear interpolation to try to achieve, can suppress the memory capacity of OS table memory (ROM) with such formation from above-mentioned measured value.
In addition, as shown in figure 17, control CPU12H has the temperature detection data that temperature sensor 20 is obtained and the defined threshold temperature data Th1 that is predetermined, threshold value judegment part 12a that Th2, Th3 compare and according to the comparative result that is obtained by threshold value judegment part 12a, select some among OS table memory (ROM) 1a～1d, generate and switch the control signal efferent 12b that switch-over control signal that OS parameter L EVEL1～LEVEL4 uses is exported.
For example as shown in figure 18,, the temperature in the temperature sensor 20 detected devices emphasizes that transformation component 14H selects OS table memory (ROM) 1a to carry out reference here, if below switching threshold Th1 (=15 ℃), then controlling the CPU12H indication.By means of this, emphasize that transformation component 14H uses the OS parameter L EVEL1 that is stored in OS table memory (ROM) 1a, carries out the conversion process of emphasizing of input image data.
In addition, if the temperature in the detected device of temperature sensor is bigger and below switching threshold temperature T h2 (=25 ℃), then control device CPU12H indication emphasizes that transformation component 14H selection OS table memory (ROM) 1b carries out reference than switching threshold temperature T h1 (=15 ℃).By means of this, emphasize that transformation component 14H uses the transformation parameter LEVEL2 that emphasizes that is stored in OS table memory (ROM) 1b to carry out the conversion process of emphasizing of input image data.
Also have, if the temperature in the temperature sensor 20 detected devices is bigger and below switching threshold temperature T h3 (=35 ℃), then control device CPU12H indication emphasizes that transformation component 14H selection OS table memory (ROM) 1c carries out reference than switching threshold temperature T h2 (=25 ℃).By means of this, emphasize that transformation component 14H uses the transformation parameter LEVEL3 that emphasizes that is stored in OS table memory (ROM) 1c to carry out the conversion process of emphasizing of input image data.
And if the temperature in the temperature sensor 20 detected devices is bigger than switching threshold temperature T h3 (=35 ℃), then control device CPU12H indication emphasizes that transformation component 14H selects OS table memory (ROM) 1d to carry out reference.By means of this, emphasize that transformation component 14H uses the OS parameter L EVEL4 that is stored in OS table memory (ROM) 1d to carry out the conversion process of emphasizing of input image data.
Usually in display panels, owing to the time that changes to another middle gray from some middle gray is long, and the tracing property to input signal becomes very poor during low temperature, increased the response time, therefore middle gray can not be shown in 1 image duration (being 16.7msec when for example 60Hz lines by line scan), image retention not only takes place, the problem that can not correctly show middle gray in addition, use above-mentioned overshoot driving circuit, by the grey level of input image data is emphasized to transform to the grey scale change direction, after during showing, make display panels 17 reach the target gray scale intensities of input image data regulation through 1 frame that is predetermined, as shown in Figure 19, like this can display-object middle gray of enough short time (in 1 image duration).
In above-mentioned overshoot driving method, the grey level of input image data is emphasized to transform to the grey scale change direction, make that the back display panels reaches the target gray scale intensities that input image data determines during 1 vertical demonstration that process is predetermined, even under the same terms, the different input image data of standard is play in input, the vertical frequency of input image data (vertical display cycle) is not simultaneously, the gray scale intensities that reaches through back liquid crystal during 1 vertical demonstration is also different, overshoot is driven correctly work.
For example, in current television broadcasting, it is that TSC-system formula and the vertical frequency of 60Hz (525 of sweep traces) is the pal mode of 50Hz (625 of sweep traces) that vertical frequency is arranged, the SECAM-system formula, developed the multi-system television machine that these TV signal of playing standard also can show that receives, but above-mentioned existing liquid crystal indicator is being used under the situation of such multi-system television machine, overshoot is driven correctly works, enlarged the error of interframe data, be formed on the image noise that does not have in original input image data, the problem of the image quality deterioration that makes display image is arranged.
The object of the present invention is to provide a kind of liquid crystal TV set, although the standard of televising (video format) difference of this televisor input image data, in case this input image data is implemented the identical conversion process of emphasizing, the error that can suppress interframe data enlarges, and suppresses because of producing the image quality deterioration that video noise caused that does not have in original input image data.
Summary of the invention
In order to achieve the above object, liquid crystal TV set of the present invention, be according at least 1 vertical during before view data and current view data during vertical, by the view data of emphasizing that the transfer pair display panels provides, compensate the liquid crystal TV set of the optical response of described display panels, wherein, described liquid crystal TV set can show the view data of multiple broadcast standard, and possess: detecting input image data is the vision signal of the 1st broadcast standard, other signal classification detection means of class signal of the vision signal of the 2nd still different broadcast standards with the vision signal vertical frequency of the 1st broadcast standard, and the conversion of emphasizing of carrying out described view data, make described display panels reach the shift means of emphasizing of described view data regulation transmitance in during regulation; According to the testing result of described signal classification detection means, the described conversion degree of emphasizing of the described view data of shift means of emphasizing is carried out variable control.In addition, be equivalent to during vertical 1 frame (1 コ マ) during, write in 1 image duration of view data (1 コ マ) under the situation of a whole two field picture of scan image data, 1 vertical during with 1 vertical demonstration during consistent.In addition, the conversion of emphasizing of above-mentioned view data is implemented with pixel unit.
Liquid crystal TV set of the present invention possesses: storage is the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1 by current view data during vertical; The described shift means of emphasizing has the described transformation parameter of emphasizing of use, described view data is implemented to emphasize the operational part of computing and according to the testing result of described signal classification detection means, the multiplying portion of the output data of described operational part be multiply by different coefficients.
Liquid crystal TV set of the present invention, the coefficient settings of described multiplying portion be, is that the 2nd the described input image data of coefficient ratio when playing the vision signal of standard is that the 1st coefficient when playing the vision signal of standard is little at described input image data.
Liquid crystal TV set of the present invention, possess: described input image data is the 1st to play reference under the situation of vision signal of standard, storage according to current view data during vertical vertical with 1 during before the table memory of emphasizing transformation parameter of view data appointment and described input image data be the 2nd to play reference under the situation of vision signal of standard, storage is the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1 according to current view data during vertically; The described shift means of emphasizing has the testing result that obtains according to described signal classification detection means, uses the described transformation parameter of reading from described table memory of emphasizing, described view data is implemented to emphasize the operational part of computing.
Liquid crystal TV set of the present invention, the described value of emphasizing the parameter parameter and is that the 1st parameter of reading when playing the vision signal of standard is compared at described input image data, is that the 2nd parameter of reading when playing the vision signal of standard is less at described input image data.
Liquid crystal TV set of the present invention also possesses the temperature detection means of the temperature in the pick-up unit; The described testing result of emphasizing that shift means obtains according to described temperature detection means changes the conversion degree of emphasizing to described view data.
Liquid crystal TV set of the present invention, also possess storage according to current view data during vertical the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1; The described shift means of emphasizing has: use the described transformation parameter of emphasizing, described view data is implemented to emphasize the operational part of computing and detected the testing result that the testing result that obtains and described temperature detection means obtain, the multiplying portion of the output data of described operational part be multiply by different coefficients according to described signal classification detection means.
Liquid crystal TV set of the present invention, possess: described input image data is the 1st to play reference under the situation of standard, storage according to current view data during vertical vertical with 1 during before the table memory of emphasizing transformation parameter of view data appointment and described input image data be the 2nd to play reference under the situation of standard, storage is the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1 according to current view data during vertically; The described shift means of emphasizing has: the testing result that obtains according to described signal classification detection means, the described parameter parameter of emphasizing that use is read from described table memory, to described view data implement to emphasize computing operational part and, detect the testing result that obtains, the multiplying portion of the output data of described operational part be multiply by different coefficients according to described signal classification detection means.
Liquid crystal TV set of the present invention, possess: described input image data is the 1st to play reference under the situation of vision signal of standard, storage corresponding to each temperature in the multiple arrangement and according to the temperature of device and according to current view data during vertical the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1, and described input image data is the 2nd to play reference under the situation of vision signal of standard, storage corresponding to each temperature in the multiple arrangement and according to the temperature of device and according to current view data during vertical the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1; The described shift means of emphasizing has the testing result that the testing result that obtains according to described signal classification detection means and described temperature detection means obtain, the described transformation parameter of emphasizing that use is read from described table memory is implemented to emphasize the operational part of computing to described view data.
Liquid crystal TV set of the present invention, possess storage corresponding in the multiple arrangement each temperature and according to current view data during vertical the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1, the described shift means of emphasizing has the result who compares with the testing result that described temperature detection means obtain according to the switching temperature of the testing result regulation of utilizing described signal classification detection means to obtain, the described transformation parameter of emphasizing that use is read from described table memory is implemented to emphasize the operational part of computing to described view data.
Liquid crystal TV set of the present invention possesses the control device controlled is selected in the described switching of emphasizing transformation parameter; Described control device has: implement threshold value judegment part that the operational part to the regulation computing of the signal classification decision of each described input image data, the temperature data that will utilize described operational part to calculate compare with the defined threshold temperature data that is predetermined and the comparative result that obtains according to described threshold value judegment part for the detected temperature data of described temperature inspection means, generation is carried out the control signal efferent of the switch-over control signal of switching controls to the described transformation parameter of emphasizing.
Liquid crystal TV set of the present invention possesses the control device controlled is selected in the described switching of emphasizing transformation parameter; Described control device has: with the detected temperature data of described temperature detection means and threshold value judegment part that the threshold temperature data of the classification of each described input image data signal regulation are compared and the comparative result that obtains according to described threshold value judegment part, generate the described transformation parameter of emphasizing is carried out the control signal efferent of the switch-over control signal of switching controls.
Liquid crystal display control method of the present invention, be have according at least 1 vertical during before view data and current view data during vertical, by the view data that offers display panels is emphasized conversion, compensate the liquid crystal display control method of the optical response of described display panels, wherein, described display panels can show the view data of multiple broadcast standard, have: the view data that detects input is the vision signal of the 1st broadcast standard, still the 2nd different with the vision signal vertical frequency of the 1st broadcast standard signal classifications of playing the vision signal of standard detect operation, and the conversion of emphasizing of carrying out described view data, make described display panels reach the operation of the transmitance of described view data regulation in during regulation; According to other testing result of described class signal, the described conversion degree of emphasizing of the described view data of conversion of emphasizing is carried out variable control.
Liquid crystal display control method of the present invention, possess: with reference to storage according to current view data during vertical vertical with 1 during before the described transformation parameter of emphasizing of operation, use of the table memory of emphasizing transformation parameter of view data appointment described image parameter enforcement is emphasized the operation of computing and according to described signal classification testing result, the output data of described operational part be multiply by the operation of different coefficients.
Liquid crystal display control method of the present invention, possess: described input image data is the 1st to play reference under the situation of vision signal of standard, storage according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation, described input image data is the 2nd to play reference under the situation of vision signal of standard, storage according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation, and according to described signal classification testing result, the described transformation parameter of emphasizing that use is read from described table memory is implemented to emphasize the operation of computing to described view data.
Liquid crystal display control method of the present invention has: the operation of the temperature in the pick-up unit and according to the testing result of the temperature in the described device changes the operation of emphasizing the conversion degree of described view data.
Liquid crystal display control method of the present invention, have: with reference to operation, use described the emphasize transformation parameter of storage by the table memory of emphasizing transformation parameter of view data appointment preceding during vertical according to current view data during vertical with 1, described view data is implemented to emphasize the operation of computing and the testing result that detects according to described signal classification and the testing result of the temperature in the described device, and the output data that described computing is obtained multiply by the operation of different coefficients.
Liquid crystal display control method of the present invention, have: described input image data is the 1st to play reference under the situation of vision signal of standard, storage according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation, described input image data is the 2nd to play reference under the situation of vision signal of standard, storage according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation, according to described signal classification testing result, the described transformation parameter of emphasizing that use is read from described table memory, described view data is implemented to emphasize the operation of computing, and according to the testing result of the temperature in the described device, the output data that described computing is obtained multiply by the operation of different coefficients.
Liquid crystal display control method of the present invention, have: described input image data is the 1st to play reference under the situation of vision signal of standard, storage corresponding to each temperature of the temperature in the multiple arrangement and according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation, described input image data is the 2nd to play reference under the situation of vision signal of standard, storage corresponding to each temperature of the temperature in the multiple arrangement and according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation, and according to the testing result of temperature in other testing result of described class signal and the described device, the described transformation parameter of emphasizing that use is read from described table memory is implemented to emphasize the operation of computing to described view data.
Liquid crystal display control method of the present invention, have: with reference to storage corresponding to each temperature of the temperature in the multiple arrangement and according to current view data during vertical the operation of the table memory of emphasizing transformation parameter of preceding view data appointment and according to the comparative result of the testing result of the switching temperature of utilizing other testing result of described class signal to determine and the temperature in the described device during vertical with 1, the described transformation parameter of emphasizing that use is read from described table memory is emphasized the operation of computing to described view data.
Liquid crystal display control method of the present invention, have: to temperature data as the testing result of the temperature in the described device, carry out the operation to the regulation computing of the signal classification of each described input image data decision, operation that the temperature data that will implement described computing and the defined threshold temperature data that is predetermined are compared and according to described comparative result, the described operation of emphasizing the switch-over control signal of transformation parameter of generation switching controls.
Liquid crystal display control method of the present invention, have: the operation that will be compared as the temperature data of the testing result of the temperature in the described device and defined threshold temperature data to the signal classification decision of each described input image data and according to described comparative result generates the described operation of emphasizing the switch-over control signal of transformation parameter of switching controls.
But above-mentioned liquid crystal TV set also can be realized with hardware, also can realize by making executive program.Specifically, program of the present invention, the view data that can show multiple broadcast standard, and according at least 1 vertical during before view data and current view data during vertical, the view data that offers display panels is emphasized conversion, make described display panels in specified time limit, reach the transmitance of described view data regulation, control with this liquid crystal TV set to the optical response that compensates described display panels; Wherein, described program is to make described computing machine carry out the program of the following stated operation: according to detecting the vision signal that the input characteristics data are the 1st broadcast standards, still the signal classification testing result that the 2nd different with the vision signal vertical frequency of the 1st broadcast standard vision signals of playing standard obtains is carried out the operation of variable control to the conversion degree of emphasizing of described view data.In addition, recording medium of the present invention is the recording medium of storage said procedure.
Liquid crystal TV set of the present invention, utilizing signal classification detection means to detect input image data is the signal classification that the 1st vision signal or the 2nd of playing standard (video format) is play the vision signal of standard (video format), carries out the conversion of emphasizing of input image data according to this detected signal classification.At this moment, according to signal classification testing result the conversion degree of emphasizing of the input image data of emphasizing shift means is carried out variable control, with input image data is that the 1st situation of playing the vision signal of standard (video format) is compared, make to the frame period long the 2nd play standard (video format) vision signal input image data emphasize that the conversion degree is little.Thereby input image data to any broadcast standard (video format), also can carry out the conversion of emphasizing of this input image data, often to make display panels that the transmitance of this input image data regulation is arranged, can realize that like this image of high-quality screen shows in specified time limit (pixel is rewritten the cycle).
Like this, liquid crystal TV set of the present invention, can often obtain the suitable transform data of emphasizing to the input image data of the variant standard of televising (video format) and offer display panels, the view data that no matter shows any broadcast standard (video format) can both realize that the image of high-quality screen shows.
Other purposes of the present invention, feature and advantage can be known in record as described below and recognize.Advantage of the present invention can be recognized by the following explanation that the reference accompanying drawing carries out.
Description of drawings
Fig. 1 is the key diagram that is used to illustrate the example 1 of liquid crystal indicator of the present invention.
Fig. 2 is that OS parameter that the OS table memory (ROM) with reference to Fig. 1 obtains and the key diagram of trying to achieve the situation of emphasizing transform data that display panels is provided according to the multiplying coefficient that the signal categorical data is endowed are used in explanation.
Fig. 3 is the reference when being the vision signal of pal mode or SECAM-system formula (50Hz) of OS table memory (ROM) and the input image data of expression storage OS parameter of reference when to be respectively equipped with input image data be the vision signal of TSC-system formula (60Hz), the figure of the example 2 during the OS table memory (ROM) of storage OS parameter.
Fig. 4 is illustrated in the structure of Fig. 1 to increase temperature sensor, the OS parameter that use obtains with reference to OS table memory (ROM) and corresponding to the multiplying coefficient of the signal classification and the temperature in the device of input image data is carried out the figure to the example 3 of emphasizing situation about handling of view data.
Fig. 5 is the reference when adopting the OS table memory (ROM) of the storage OS parameter of reference when to be respectively equipped with input image data be the vision signal of TSC-system formula (60Hz) and vision signal that input image data is pal mode or SECAM-system formula (50Hz) of the OS table memory (ROM) of presentation graphs 4, the structure of the OS table memory (ROM) of storage OS parameter, use changes the figure to the example 4 under the situation of emphasizing the conversion degree of view data corresponding to the multiplying coefficient of temperature in the device.
Fig. 6 is used to illustrate OS parameter that use obtains with reference to the OS table memory (ROM) of Fig. 5 and tries to achieve the key diagram of the situation of emphasizing transform data with the corresponding multiplying coefficient of temperature detection data that temperature sensor obtains.
Fig. 7 is that reference when to be respectively equipped with input image data be the vision signal of TSC-system formula (60Hz) is adopted in expression, respectively reference when the OS table memory (ROM) of the OS parameter of corresponding each temperature range and vision signal that input image data is PLA standard or SECAM-system formula (50Hz) of storage, storage correspond respectively to the figure of the example 5 under the situation of structure of OS table memory (ROM) of OS parameter of each temperature range.
Fig. 8 is the figure of details that is used for the control CUP of key diagram 7.
Fig. 9 is used to illustrate according to the signal classification of input image data and the temperature in the device switch the key diagram of the action of the OS table memory (ROM) of selecting Fig. 7.
Figure 10 is illustrated under the situation of vision signal that input image data is a TSC-system formula (60Hz) and the figure of the example 6 during the common OS of use parameter under the situation of the vision signal of pal mode or SECAM-system formula (50Hz).
Figure 11 represents the details of the control CPU of Figure 10.
Figure 12 is used to illustrate according to the signal classification of input image data and the temperature in the device switch the key diagram of the action of the OS table memory (ROM) of selecting Figure 10.
Figure 13 is the figure that the control CPU as Figure 10 possesses the example 7 under the situation of other structures.
Figure 14 be illustrated in input image data be TSC-system formula (60Hz) vision signal situation and only use the figure of example 8 of the situation of a part of OS parameter when being the situation of vision signal of pal mode or SECAM-system formula (50Hz) jointly.
Figure 15 represents a configuration example of existing liquid crystal indicator.
Figure 16 represents to be stored in the example of OS parameter of the OS table memory (ROM) of Figure 15.
Figure 17 represents the configuration example of the control CPU of Figure 15.
Figure 18 is used to illustrate the key diagram that switches the action of the table memory (ROM) of selecting Figure 15 according to the temperature in the device.
Figure 19 is the key diagram that is used to illustrate that the overshoot of the liquid crystal indicator of Figure 15 drives.
Embodiment
For improving response speed of liquid crystal, in the liquid crystal indicator of the present invention (liquid crystal TV set), utilize above-mentioned overshoot to drive input image data is emphasized conversion process, but the vision signal of pal mode or SECAM-system formula (50Hz) at this moment, compare with the vision signal of TSC-system formula (60Hz), frame period is longer, in case these view data are implemented the same conversion process of emphasizing, can prevent from the gray scale intensities that reaches, to produce error the image quality deterioration of display image through the display panels after 1 image duration.At this moment, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), be that the vision signal of TSC-system formula (60Hz) is compared with input image data, make view data emphasized that the conversion degree is littler.By means of this, view data for any broadcast standard (video format), all the optical response to display panels compensates, suppress the incomplete and tail shadow of image, can prevent simultaneously because the image demonstration of high-quality screen is carried out in the generation of excessively emphasizing the video noise that conversion causes of view data.Here, be the 1st to play the vision signal of standard (video format) with the vision signal of TSC-system formula (60Hz), be the 2nd to play the vision signal of standard (video format) with the vision signal of pal mode or SECAM-system formula (50Hz).Below the present invention will be described in more detail with these embodiment, but the present invention is not limited to this.
Example 1
Fig. 1 is the figure that is used to illustrate the example 1 of liquid crystal indicator of the present invention.Fig. 2 is that explanation is used OS parameter that the OS table memory (ROM) with reference to Fig. 1 obtains and according to because of playing the multiplying coefficient that the different signal categorical data of standard (video format) is given, the key diagram that the situation of emphasizing transform data that trying to achieve provides display panels is used.In addition, in the following figure that describes, give identical label with the part that Figure 15 is common.Also have, in the following description since each example emphasize that transformation component carries out emphasize the conversion difference, in each example, give any one among label 14A～Figure 14 F.Equally, also because the control difference that the control CPU of each example carries out is given any one among label 12A～12F in each example.
In order to improve the optic response speed of display panels, the liquid crystal indicator of example 1 shown in Figure 1 is implemented the conversion process of emphasizing to view data, at this moment, making input image data is that the conversion degree of emphasizing of the input image data under the situation of pal mode or SECAM-system formula is little under the situation of TSC-system formula (60Hz) than input image data, possesses video signal detection portion 10, controls CPU12A, emphasizes transformation component 14A, frame memory 15, liquid-crystal controller 16, display panels 17.
As the vision signal classification test section 10 of signal classification detection means, detecting input image data is the vision signal of TSC-system formula (60Hz) or the signal classification of the vision signal of the standard of pal mode or SECAM (50Hz).
As an example, vision signal classification test section 10 is arranged on the TV signal that receives above-mentioned multiple broadcast standard, the TV signal that receives is decoded as the tuning decoding part of input image data, if the vision signal of SECAM-system formula, then vision signal classification test section 10 just judges whether the SECAM ID that is comprised is included in the vision signal of input, can judge whether the vision signal of input is the SECAM-system formula.In addition, pal mode is for the burst phase reversal of (R-Y) of each horizontal line (line), and the TSC-system formula is nonreversible for the burst phase place of (R-Y) of per 1 horizontal line, therefore whether the phase place of burst (R-Y) of the vision signal of vision signal classification test section 10 identification inputs reverses for per 1 horizontal line, if counter-rotating, pal mode can be judged to be,, the TSC-system formula can be judged to be if nonreversible.In addition, in the vision signal of pal mode, having subcarrier is the vision signal of 3.58MHz and the vision signal of 4.43MHz, but vision signal classification test section 10 can judge it is among both which according to the frequency of subcarrier of the vision signal of input.In addition, because the frequency of the subcarrier of the vision signal of TSC-system formula is 3.58MHz, therefore vision signal classification test section 10 judges whether be that subcarrier is the vision signal pal mode of 4.43MHz according to the frequency of subcarrier, then, whether also can reverse for per 1 horizontal line according to the phase place of above-mentioned bursting (R-Y), judgement is that the vision signal or the subcarrier of TSC-system formula is the pal mode of the vision signal of 3.58MHz.In addition, described vision signal classification test section 10 also can be according to the identification signal of for example the playing standard signal classification of seeking knowledge.In addition, described video signal detection portion 10 is as long as the judgement input image data is the vision signal of the 1st broadcast standard or the signal classification of the vision signal of the 2nd broadcast standard different with the vision signal vertical frequency of the 1st broadcast standard, for example, also can directly detect its frequency according to the vertical synchronizing signal of input image data, the decision signal classification.
On the other hand, according to vision signal classification test section 10 detected signal classifications, utilization is emphasized that the conversion process of emphasizing that transformation component 14A carries out controls as the control CPU12A of control device.
Emphasize transformation component 14 as what emphasize shift means, utilization compares the view data before the view data of the present frame that after this shows (current vertical during view data) and 1 frame that is stored in frame memory 15 (1 vertical during preceding view data) by the control carried out of control CPU, read corresponding to OS parameter (emphasizing transformation parameter) from OS table memory (ROM) 13 as the grey scale change pattern of its comparative result, according to this OS parameter of reading, the image of trying to achieve the present frame that after this shows shows the needed transform data (writing gradation data) of emphasizing, outputs to liquid-crystal controller 16.
In this case, as shown in Figure 2, the multiplying coefficient that the OS parameter that use obtains with reference to OS table memory (ROM) 13 and signal classification (broadcast format) according to input image data are endowed can be tried to achieve with this and to be emphasized transform data to what display panels 17 provided.Promptly utilize the input image data (Current Data) of the M frame that after this operational part 14d will show to compare with the input image data (Previous Data) of the M-1 frame that is stored in frame memory 15, to from OS table memory (ROM) 13, read corresponding to (promptly utilizing this comparative result appointment) OS parameter of this comparative result (grey scale change), and utilize output such as the computing of implementing linear interpolation to emphasize operational data.
And, utilize subtraction device 14a to carry out deducting this subtraction of emphasizing operational data and ask differential data from the view data of present frame, utilize multiplicative operator 14b that this differential data be multiply by multiplying factor alpha 1 or the β 1 that utilization is switched from the next coefficient switch-over control signal of control CPU12A, utilize adder calculator 14c to add that on the view data of present frame this multiplying coefficient and differential data are long-pending, the data that this additive operation is obtained are as emphasizing that transform data gives liquid-crystal controller 16.By means of this, the input image data of unlike signal classification is driven demonstration, make its liquid crystal pixel reach the transmitance of input image data regulation in during regulation.Here, be meant during the so-called regulation (pixel is rewritten the cycle) during the demonstration of 1 two field picture, under the situation that common maintenance (ホ-Le De) type shows be 1 image duration (for example being 20.0msec under the situation of lining by line scan for 16.7msec, for example 50Hz under the situation that 60Hz lines by line scan), for example adopt 1 image duration 50% during carry out under the situation that the analog pulse type of black display shows, image becomes 1/2 image duration (being 8.3msec when for example 60Hz lines by line scan, is 10.0msec when 50Hz lines by line scan) during showing.
In addition, the multiplying coefficient when input image data is the vision signal of TSC-system formula (60Hz) is α 1=1, and the multiplying coefficient when input image data is the vision signal of pal mode or SECAM-system formula (50Hz) is β 1＜1.Therefore, be under the situation of vision signal of TSC-system formula (60Hz) at input image data, select multiplying factor alpha 1 (=1), carry out the conversion of emphasizing of view data, make liquid crystal pixel in specified time limit, reach the transmitance of input image data regulation, show with this image of realizing not taking place the high-quality screen of image retention and tail shadow.
On the other hand, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), select multiplying factor beta 1 (＜1), can make and emphasize that the conversion degree is littler.So, the vision signal of pal mode or SECAM-system formula (50Hz) is compared with the vision signal of TSC-system formula (60Hz), frame period is longer, by emphasizing conversion, make liquid crystal pixel in specified time limit, reach the transmitance of input image data regulation, show with this image of realizing not taking place the high-quality screen of image retention and tail shadow.Promptly can prevent to occur in unexistent video noise in the original input image data owing to the liquid crystal that conversion causes of excessively emphasizing to view data excessively responds.
In addition, be under 8 the situation of 256 gray shade scales at the video data number, in OS table memory (ROM) 13, also can have OS parameter (measured value) to whole 256 gray scales, for example as shown in figure 16, only store 9 * 9 OS parameters (measured value) for 9 representative gray scales of per 32 gray scales, the transform data of emphasizing for other gray scales, therefore its structure can suppress the memory capacity of OS table memory (ROM) 13 for to be tried to achieve by computings such as linear interpolations by above-mentioned measured value.
Frame memory 15 is the storeies that can store the view data of 1 frame sign, the view data of storage before for 1 frame of the view data of the present frame that after this shows.Liquid-crystal controller 16 is according to the transform data of emphasizing of emphasizing transformation component 14, driving grid driver 18 and source electrode driver 19 carry out image to display panels and show.Display panels 17 has (the ThinFilm Transistor as the TFT of above-mentioned nonlinear element (on-off element); Thin film transistor (TFT)), utilize the driving of gate drivers 18 and source electrode driver 19 to carry out the image demonstration.
Then, the liquid crystal display control method that conversion is carried out of emphasizing by the input image data in the above-mentioned example 1 is described.
At first, when input image data is arranged, utilize vision signal classification testing circuit 10, detection is the vision signal of TSC-system formula (60Hz) or the signal classification of the vision signal of pal mode or SECAM-system formula (50Hz).
When detecting the vision signal of TSC-system formula (60Hz) for example, detect the vision signal of TSC-system formula (60Hz) by 10 pairs of control of vision signal classification test section CPU12 notice here.
At this moment, utilize control CPU12A to indicate, make it that input image data is emphasized conversion process emphasizing transformation component 14A.In this case, as mentioned above, the M frame input image data (Current Data) that utilizes operational part 14d after this to show is compared with the M-1 frame input image data (Previous Data) that is stored in frame memory 15, to from OS table memory (ROM) 13, read corresponding to the OS parameter of this comparative result (grey scale change), and try to achieve and emphasize operational data.In addition, this emphasizes that operational data is the view data for the TSC-system formula, and display panels 17 can reach the data of the transmitance of the M frame input image data defined of back demonstration thus in specified time limit.Utilize subtraction device 14a to ask this to emphasize the differential data of the M frame input image data that operational data and back thus show.
Here, because control CPU12A is chosen in the multiplying factor alpha 1 (=1) under the situation of vision signal of TSC-system formula (60Hz), multiplicative operator 14b will be multiply by multiplying factor alpha 1 (=1) (promptly exporting differential data) by the differential data that subtraction device 14a obtains with remaining unchanged, utilize adder calculator 14c with this multiplying data that obtain and the M frame input image data addition that after this shows, this additive operation data as emphasize transform data offer liquid-crystal controller 16 (thereby, in this case, the transform data of emphasizing that display panels 17 is provided equates with the operational data of emphasizing that obtains by operational part 14).By means of this, be under the situation of vision signal of TSC-system formula (60Hz) at input image data, drive liquid crystal pixel, make it in specified time limit, reach the transmitance of the regulation of input image data, therefore can the optical response of display panels 17 be compensated, show with the image of carrying out the high-quality screen that image retention and tail shadow do not take place.
Relative with it, when utilizing vision signal classification test section 10 to detect the vision signal of pal mode or SECAM-system formula (50Hz), send the indication of the input image data of pal mode or SECAM-system formula (50Hz) being emphasized conversion process to emphasizing transformation component 14A with regard to utilizing control CPU12A.In this case, as mentioned above, utilize the input image data (Previous Data) of operational part 14d M frame input image data (CurrentData) that will after this show and the M-1 frame that is stored in frame memory 15 to compare, OS parameter corresponding to this comparative result (grey scale change) is read from OS table memory (ROM) 13, try to achieve and emphasize operational data.In addition, this emphasizes that operational data is the view data for the TSC-system formula, the data of the transmitance of the M frame input image data regulation that shows after display panels 17 can reach thus in specified time limit.Utilize subtraction device 14 to try to achieve the differential data that this emphasizes operational data and the M frame input image data that after this shows.
Here, multiplying factor beta 1 (＜1) under the situation of the vision signal of utilization control CPU12A selection pal mode or SECAM-system formula (50Hz), therefore, utilize multiplicative operator 14b multiply by to calculate multiplying factor beta 1 (be differential data successively decrease output) by the differential data that subtraction device 14a obtains, utilize adder calculator 14c with this multiplying data that obtain and the M frame input image data addition that after this shows, data that this additive operation obtains as emphasize transform data be provided for liquid-crystal controller 16 (thereby, in this case to display panels 17 provide emphasize transform data and emphasizing of obtaining by operational part 14d operational data compared emphasize that the conversion degree is little).By means of this, at input image data is under the situation of pal mode or SECAM-system formula (50Hz), also can drive liquid crystal pixel, make it in specified time limit, reach the transmitance of input image data regulation, therefore the optical response to display panels 17 compensates, and the image that can realize not taking place the high-quality screen of image retention and tail shadow shows.
As mentioned above, in example 1, detect at vision signal classification test section 10 under the situation of vision signal of TSC-system formula (60Hz), utilization emphasizes that transformation component 14A reads the OS parameter corresponding to the comparative result (grey scale change) of the input image data of present frame and the input image data before 1 frame from OS table memory (ROM) 13, operational data is as emphasizing that transform data outputs to liquid-crystal controller 16 will to read emphasizing that the OS parameter obtains according to this, therefore can drive liquid crystal pixel, make its transmitance that in specified time limit, reaches the input image data regulation, make the image demonstration of the high-quality screen that does not have image retention and tail shadow become possibility.
Relative with it, utilizing vision signal classification test section 10 to detect under the situation of vision signal of pal mode or SECAM-system formula (50Hz), utilization emphasizes that transformation component 14A reads the OS parameter corresponding to the comparative result (grey scale change) of the input image data before the input image data of present frame and 1 frame from OS table memory (ROM) 13, make and emphasize that conversion degree beguine emphasizes that according to what this OS parameter of reading obtained operational data is little, as emphasizing that transform data outputs to liquid-crystal controller 16, therefore can prevent the generation that causes picture noise of overemphasizing owing to input image data, and can carry out display driver to liquid crystal pixel, make its transmitance that in specified time limit, reaches the input image data regulation, make the image demonstration of the high-quality screen that does not have image retention and tail shadow become possibility.
In addition, the liquid crystal indicator of this example is, the view data of view data before at least 1 frame and present frame is compared, according to this comparative result, to emphasize conversion to the view data that display panels provides, compensate the liquid crystal indicator of the optical response of described display panels with this; Possess that to detect input image data be that the 1st view data of playing standard (video format) still the 2nd is play other signal classification detection means of class signal of view data of standard (video format) and the conversion of emphasizing of carrying out described view data, make described display panels in specified time limit, reach the shift means of emphasizing of transmitance that described view data stipulates; According to the testing result that obtains by described signal classification detection means, the described conversion degree of emphasizing of the described view data of shift means of emphasizing is carried out variable control.
Therefore, can try to achieve the transform data of emphasizing that often is fit to for the input image data of multiple different broadcast standard (video format), offer display panels, show that no matter which kind of plays under the situation of view data of standard, can both realize that the image of high-quality screen shows.In addition, this liquid crystal indicator is so long as use display panels to carry out the liquid crystal indicator that image shows, be not limited to carry the equipment at one's side such as personal computer, televisor of such display device, also go for surveying instrument, medicine equipment, commercial unit etc.
Example 2
Fig. 3 be expression when storage is used in the OS table memory (ROM) of the OS parameter of emphasizing conversion of view data and vision signal that input image data is pal mode or SECAM-system formula (50Hz) when to be respectively equipped with input image data be the vision signal of TSC-system formula (60Hz) storage be used in the figure of the example 2 under the situation of OS table memory (ROM) of the OS parameter of emphasizing conversion of view data.In addition, in the following figure that describes, give identical label with the common part of Fig. 1 and the repetitive description thereof will be omitted.
In the liquid crystal indicator shown in Figure 3, possess input image data and be OS table memory (ROM) 13a of reference under the situation of vision signal of TSC-system formula (60Hz), and input image data is OS table memory (ROM) 13b of reference under the situation of vision signal of pal mode or SECAM-system formula (50Hz); According to the signal classification (broadcast format) of vision signal classification test section 10 detected input image datas, switch, with reference to OS table memory (ROM) 13a, 13b any one, carry out the conversion process of emphasizing of view data.
In addition, the OS parameter in the OS table memory (ROM) 13 is than the little value of OS parameter in OS table memory (ROM) 13a.As mentioned above, this is that to compare the frame period long for the vision signal that prevents pal mode or SECAM-system formula (50Hz) and TSC-system formula (60Hz), excessive emphasizes that conversion causes taking place the generation of the situation of video noise.
In addition, also can form such formation here, be about to each OS parameter and be stored in OS table memory (ROM) 13a, the 13b that is provided with respectively, and in the different table areas of single OS table memory (ROM) storage each OS parameter, according to switch-over control signal from control CPU12B, table area to reference suitably switches, and switches with this and selects the OS parameter, tries to achieve and emphasizes transform data.
In such structure, as mentioned above, in case vision signal classification test section 10 detects for example vision signal of TSC-system formula (60Hz), just give notice by 10 pairs of control of vision signal classification test section CPU12B, inform that the vision signal to TSC-system formula (60Hz) detects.
At this moment, utilize control CPU12B that conduct is emphasized that the transformation component 14B that emphasizes of shift means sends the indication of input image data being emphasized conversion process.In this case, emphasize that transformation component 14B is (promptly utilizing this comparative result appointment) OS parameter that OS table memory (ROM) 13a of reference reads the M frame input image data (Current Data) that shows corresponding to back thus and the comparative result (grey scale change) of the M-1 frame input image data (Previous Data) that is stored in frame memory 15 under the situation of vision signal of TSC-system formula (60Hz) from input image data, use this OS parameter to implement computings such as linear interpolation, try to achieve the transform data of emphasizing that outputs to liquid-crystal controller 16 with this.In addition, this emphasizes that transform data is the data of the transmitance that the M frame input image data of demonstration was stipulated after display panels 17 can reach thus in specified time limit.
Like this, be under the situation of vision signal of TSC-system formula (60Hz) at input image data, carry out display driver to liquid crystal pixel, make liquid crystal pixel in specified time limit, reach the transmitance of input image data regulation, therefore compensate the optical response of display panels 17, can not have the image of the high-quality screen of image retention and tail shadow to show.
And when vision signal classification test section 10 detects the vision signal of pal mode or SECM standard (50Hz), utilize control CPU12B to send the indication of the input image data of pal mode or SECAM-system formula (50Hz) being emphasized conversion process to emphasizing transformation component 14B.In this case, emphasize that OS table memory (ROM) 13b of reference when transformation component 14B is the vision signal of pal mode or SECAM-system formula (50Hz) from input image data reads (according to its comparative result appointment) the OS parameter corresponding to the comparative result (grey scale change) of the M frame input image data (CurrentData) that after this shows and the M-1 frame input image data (Previous Data) that is stored in frame memory 15, use this OS parameter to implement computings such as linear interpolation, try to achieve the transform data of emphasizing that outputs to liquid-crystal controller 16 with this.In addition, the transform data of emphasizing of trying to achieve with reference to OS table memory (ROM) 13a when this emphasizes that transform data and input image data are the vision signal of TSC-system formula is compared, and it emphasizes that the conversion degree diminishes.
By means of this, the optical response of compensation display panels 17 when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), suppress the image retention of image and the generation of tail shadow, and can suppress this situation, promptly unexistent video noise is strengthened and becomes significantly and cause the situation of image quality deterioration in original input image data.
Like this, in example 2, OS table memory (ROM) 13b that possesses OS table memory (ROM) 13a that is used in the storage OS parameter under the situation of vision signal that input image data is a TSC-system formula (60Hz) and be used in the storage OS parameter under the situation of vision signal that input image data is pal mode or SECAM-system formula (50Hz); Make the OS parameter in OS table memory (ROM) 13b be the OS parameter little value interior than OS table memory (ROM) 13a, use to try to achieve according to detected signal classification and emphasize transform data, therefore can implement corresponding to other suitable conversion process of emphasizing of the class signal of input image data view data from any one OS parameter of reading of OS table memory (ROM) 13a, 13b.
Example 3
Fig. 4 is illustrated in the structure of Fig. 1 to increase temperature sensor, the signal classification (broadcast format) of the OS parameter that use obtains with reference to OS table memory (ROM) 13, input image data and corresponding to the multiplying coefficient of temperature in the device is carried out the figure to the example 3 of emphasizing situation about handling of view data.
In liquid crystal indicator shown in Figure 4, as mentioned above, storage is suitable for the OS parameter (emphasizing transformation parameter) of situation that input image data is the vision signal of TSC-system formula (60Hz) most in OS table memory (ROM) 13, use is carried out the conversion of emphasizing to input image data corresponding to following multiplying factor alpha 1～α 4, the β 1～β 4 of signal classification detection data that obtained by the vision signal classification test section 10 as signal classification detection means and the temperature detection data that obtained by the temperature sensor 20 as the temperature detection means.
Here, in OS table memory (ROM) 13, as mentioned above, be under 8 the situation of 256 gray scales at the video data number, also can have OS parameter (measured value) to whole 256 grades of gray scales, but for example as shown in Figure 16, only store 9 * 9 OS parameters (measured value) in advance for 9 representative gray scales of per 32 gray scales, the transform data of emphasizing in addition other gray scales, by forming the formation that computings such as can utilizing linear interpolation is tried to achieve from above-mentioned measured value, suppress the memory capacity of OS table memory (ROM) 13.
The structure that transformation component 14C utilizes and Fig. 2 is same of emphasizing of this example realizes, the OS parameter that use is read from OS table memory (ROM) 13 reaches multiplying factor alpha 1～α 4, the β 1～β 4 corresponding to the temperature of signal classification and display panels 17, can try to achieve be used in compensation comprise display panels 17 temperature characterisitic optical response emphasize transform data, output to liquid-crystal controller 16.Here, the multiplying coefficient when input image data is the vision signal of TSC-system formula (60Hz) is α 1～α 4, and the multiplying coefficient when input image data is the vision signal of pal mode or SECAM-system formula (50Hz) is β 1～β 4.But β 1＜α 1, β 2＜α 2, β 3＜α 3, β 4＜α 4.
That is to say, to be divided into for example below 15 ℃ by the temperature detection data of temperature sensor 20, greater than 15 ℃ but below 25 ℃, greater than 25 ℃ but below 35 ℃, greater than 35 ℃ of 4 such other temperature ranges of level, in the input data when being the vision signal of TSC-system formula (60Hz), for example temperature is that the multiplying coefficient is α 1 (＞α 2) below 15 ℃ the time in the device, the multiplying coefficient is α 2 (＞α 3) greater than 15 ℃ but below 25 ℃ the time, the multiplying coefficient is α 3 (＞α 4) greater than 25 ℃ but below 35 ℃ the time, the multiplying coefficient is α 4 (=1) greater than 35 ℃ the time; When the input data are the vision signal of pal mode or SECAM-system formula (50Hz), for example temperature is that the multiplying coefficient is β 1 (＞β 2) below 15 ℃ the time in the device, the multiplying coefficient is β 2 (＞β 3) greater than 15 ℃ but below 25 ℃ the time, the multiplying coefficient is β 3 (＞β 4) greater than 25 ℃ but below 35 ℃ the time, the multiplying coefficient is β 4 (＜1) greater than 35 ℃ the time, though this is illustrated, can certainly adopt multiplying factor alpha 1～α 4, β 1～β 4 is corresponding to 3 stages or 3 below the stage, or the method for above temperature range coefficient of 5 stages or 5 stages.
In addition, these multiplying factor alpha 1～α 4, β 1～β 4 are coefficients that the measured value from the optical response of display panels 17 obtains in advance.Therefore, be can be under the situation of vision signal of pal mode or SECAM-system formula (50Hz) at input image data to carry out the conversion of emphasizing of view data than the little conversion degree of emphasizing under the situation of the vision signal of TSC-system formula (60Hz), optical response (comprising the characteristic with temperature correlation) to display panels 17 compensates, suppress the generation of image image retention and tail shadow, and can suppress owing to excessively emphasizing to cause generating the image quality deterioration that video noise causes.
In addition, temperature sensor 20 preferably is arranged in the display panels 17 according to its original purpose, but this structurally is difficult, therefore be arranged on can as close as possible display panels 17 the place get final product.In addition, temperature sensor 20 is not limited to one, also can be provided with a plurality of corresponding to each position of display panels 17.When being provided with a plurality of temperature sensor 20, also result's that can each temperature sensor 20 is detected mean value uses as the temperature detection data, the testing result that changes big a certain temperature sensor 20 can also be used as the temperature detection data.
In such structure, as mentioned above, when vision signal classification test section 10 detects the vision signal of TSC-system formula (60Hz) for example, send notice about the vision signal that detects TSC-system formula (60Hz) from 10 pairs of control of vision signal classification test section CPU12C.
At this moment, utilize control CPU12C that conduct is emphasized that the transformation component 14C that emphasizes of shift means sends the indication of emphasizing conversion process to input image data.In this case, as mentioned above, utilize operational part 14d to read corresponding to (promptly utilizing this comparative result appointment) the OS parameter that will magnetize comparative result (grey scale change) that the M frame input image data (Current Data) that shows compares with the M-1 frame input image data (Previous Data) that is stored in frame memory, obtain and emphasize operational data from OS table memory (ROM) 13.And, utilize subtraction device 14a to try to achieve the differential data that this emphasizes operational data and the M frame input image data that after this shows.
At this moment, control CPU12C is taken into the temperature detection data from temperature sensor 20, utilizes control CPU12C to switch to select some corresponding among the multiplying factor alpha 1～α 4 of these temperature detection data.Here, temperature detection data multiplying coefficient for example below 15 ℃ the time is α 1 (＞α 2), at multiplying coefficient greater than 15 ℃ but below 25 ℃ the time is α 2 (＞α 3), greater than 25 ℃ but the multiplying coefficient is α 3 (＞α 4) below 35 ℃ the time, the multiplying coefficient is α 4 (=1) greater than 35 ℃ the time.
According to the temperature detection data, when utilizing control CPU12C to switch among these multiplying factor alpha 1～α 4 any one, utilize multiplicative operator 14b that described differential data be multiply by some among multiplying factor alpha 1～α 4, utilize adder calculator 14c with these data that multiply each other and the M frame input image data addition that after this shows, the data that this addition obtains are as emphasizing that transform data gives liquid-crystal controller 16.Therefore, when input image data is the vision signal of TSC-system formula (60Hz), even the temperature of display panels changes, the optical response of display panels 17 is compensated, can there be the image of the high-quality screen of image retention and tail shadow to show yet.
And when utilizing video signal detection portion 10 to detect the vision signal of pal mode or SECAM-system formula (50Hz), utilize control CPU12 to send the indication of the input image data of pal mode or SECAM-system formula (50Hz) being emphasized conversion process to emphasizing transformation component 14C.In this case, as mentioned above, utilize operational part 14d, read (promptly according to this comparative result appointment) OS parameter of the comparative result (grey scale change) that obtains corresponding to M frame input image data (Current Data) that more after this shows and the M-1 frame input image data (Previous Data) that is stored in frame memory 15 from OS table memory (ROM) 13, try to achieve and emphasize operational data.Utilize subtraction device 14a to try to achieve the differential data that this emphasizes operational data and the M frame input image data that after this shows then.
At this moment, control CPU12C is taken into the temperature detection data from temperature sensor 20, utilizes control CPU12C to switch to select corresponding among the multiplying factor beta 1～β 4 of these temperature detection data any one.Here, temperature detection data instance multiplying coefficient as below 15 ℃ the time is β 1 (＞β 2), the multiplying coefficient is β 2 (＞β 3) greater than 15 ℃ but below 25 ℃ the time, the multiplying coefficient is β 3 (＞β 4) greater than 25 ℃ but below 35 ℃ the time, and the multiplying coefficient is β 4 (＜1) greater than 35 ℃ the time.
According to the temperature detection data, when utilizing control CPU12C to switch among these multiplying factor beta 1～β 4 any one, utilize multiplicative operator 14b that described differential data be multiply by some among multiplying factor beta 1～β 4, data of utilizing adder calculator 14c to multiply each other to obtain and the M frame input image data addition that after this shows, the data that this additive operation obtains are as emphasizing that transform data is provided for liquid-crystal controller 16.
Here, be under the situation of vision signal of pal mode or SECAM-system formula (50Hz) at input image data, β 1＜α 1, β 2＜α 2, β 3＜α 3, β 4＜α 4, even therefore the temperature of display panels changes, also can the optical response (comprising the characteristic with temperature correlation) of display panels 17 be compensated, can prevent owing to the excessive generation of emphasizing the video noise that conversion causes, show to carry out high-quality image to view data.
Like this, in example 3, use is corresponding to the temperature detection data that obtained by temperature sensor 20, multiplying factor beta 1～β 4 during vision signal that multiplying factor alpha 1～α 4 when input image data is the vision signal of TSC-system formula (60Hz) and input image data are pal mode or SECAM-system formula (50Hz), carry out variable control to the conversion degree of emphasizing of view data, therefore can implement the suitable conversion process of emphasizing corresponding to the signal classification of input image data and the temperature in the device to view data, the image that makes it possible to carry out high-quality screen shows.
Example 4
Fig. 5 is that the OS table memory (ROM) of presentation graphs 4 adopts reference when input image data is set respectively is the vision signal of TSC-system formula (60Hz), the reference during as the vision signal of pal mode or SECAM-system formula (50Hz) of the OS table memory (ROM) of emphasizing the OS parameter that conversion is used of storing image data and input image data, the structure of the OS table memory (ROM) of emphasizing the OS parameter that conversion is used of storing image data, use changes the figure to the example 4 under the situation of emphasizing the conversion degree of view data corresponding to the multiplying coefficient of the temperature in the device.Fig. 6 is used to illustrate that the OS parameter that use obtains with reference to the OS table memory (ROM) of Fig. 5 and the multiplying coefficient of the temperature detection data that obtain corresponding to temperature sensor try to achieve the key diagram of the situation of emphasizing transform data.
In liquid crystal indicator shown in Figure 5, OS table memory (ROM) 13a of reference when possessing input image data and be the vision signal of TSC-system formula (60Hz), and OS table memory (ROM) 13b of input image data reference when being the vision signal of pal mode or SECAM-system formula (50Hz); Vision signal according to vision signal, pal mode or the SECAM-system formula (50Hz) of detected TSC-system formula (60Hz), switching some with reference among OS table memory (ROM) 13a, the 13b uses following multiplying factor alpha 1～α 4 corresponding to the temperature detection data that obtained by temperature sensor 20 to carry out the conversion of emphasizing to input image data simultaneously.
In addition, the OS parameter in OS table memory (ROM) 13b is than the little value of OS parameter in OS table memory (ROM) 13a.As mentioned above, this be because, the vision signal of pal mode or SECAM-system formula (50Hz) is longer than the vision signal frame period of TSC-system formula (60Hz), in order to prevent owing to the excessive generation of emphasizing the video noise that conversion causes, when input image data was the vision signal of pal mode or SECAM-system formula (50Hz), being necessary to make the degree of emphasizing conversion to view data was little under the situation of vision signal of TSC-system formula (60Hz) than input image data.
In addition, here also can as described belowly constitute, just each OS parameter is stored in OS table memory (ROM) 13a, the 13b that are provided with respectively respectively, but also each OS parameter can be stored in the different form field of single OS storer (ROM), according to switch-over control signal from control CPU12D, suitably switch the form field of reference, select, try to achieve and emphasize transform data with this switching of carrying out the OS parameter.
In addition, at OS table memory (ROM) 13a, among the 13b, as mentioned above, when the data presented number is 256 gray scales of 8, also can have OS parameter (measured value) to whole 256 gray shade scales, but for example as shown in Figure 16, a storage is for 9 * 9 OS parameters (measured value) of 9 representative gray scales of the gray scale of per 32 grades in advance, the transform data of emphasizing in addition other gray scales, can utilize computings such as linear interpolation to try to achieve from above-mentioned measured value, utilize such formation, can suppress the memory capacity of OS table memory (ROM) 13.
The transformation component 14D that emphasizes of this example utilizes the structure identical with Fig. 2 to realize, use according to input signal classification (broadcast format) from OS table memory (ROM) 13a, 13b some OS parameters of reading and corresponding to the multiplying factor alpha 1～α 4 of the temperature of display panels 17, can try to achieve and be used to compensate comprising and the transform data of emphasizing of the optical response of the correlativity of temperature of display panels 17, output to liquid-crystal controller 16.
That is to say, for example will be divided into below 15 ℃ from the temperature detection data of temperature sensor 20, greater than 15 ℃ but below 25 ℃, greater than 25 ℃ but below 35 ℃, greater than 35 ℃ four sections temperature ranges, the temperature in device for example be below 15 ℃ the time multiplying coefficient be α 1 (＞α 2), greater than 15 ℃ but below 25 ℃ the time multiplying coefficient be α 2 (＞α 3), greater than 25 ℃ but the multiplying coefficient is α 3 (＞α 4) below 35 ℃ the time, the multiplying coefficient is α 4 (=1) greater than 35 ℃ the time; More than such situation is described, but can certainly adopt the multiplying coefficient and below 3 sections or 3 sections, or the coefficient of the temperature range correspondence more than 5 sections or 5 sections.
In addition, these multiplying factor alpha 1～α 4 is coefficients that the measured value from the optical response of display panels 17 obtains in advance.Therefore, when being the vision signal of pal mode or SECAM-system formula (50Hz), input image data can the little conversion degree of emphasizing carry out the conversion of emphasizing of view data with than the vision signal of TSC-system formula (60Hz) time, prevent because the excessive generation of emphasizing the video noise that conversion causes, and the optical response (comprising the characteristic with temperature correlation) of display panels 17 compensated, show with the high-quality image that does not have image retention and tail shadow.
In addition, temperature sensor 20 preferably is arranged in the display panels 17 according to its original purpose, but this structurally is difficult, and therefore being arranged on to greatest extent, the place of close display panels 17 gets final product.In addition, temperature sensor 20 also can be provided with a plurality of corresponding to each position of display panels 17, and is not limited to one.When being provided with a plurality of temperature sensor 20, also the mean value of temperature that can each temperature sensor 20 is detected uses as the temperature detection data, the testing result that changes big some temperature sensors 20 can also be used as the temperature detection data.
In such structure, as mentioned above, when vision signal classification test section 10 detects the vision signal of TSC-system formula (60Hz) for example, send notice about the vision signal that detects TSC-system formula (60Hz) from 10 pairs of control of vision signal classification test section CPU12D.At this moment, utilize control CPU12 that conduct is emphasized that the transformation component 14D that emphasizes of shift means sends the indication of input image data being emphasized conversion.In this case, as shown in Figure 6, control CPU12D utilizes the parameter switch-over control signal to send indication with reference to OS table memory (ROM) 13a.And, (promptly according to this comparative result appointment) OS parameter of the comparative result (grey scale change) that utilizes operational part 14d to read from OS table memory (ROM) 13a to compare with the M-1 frame input image data (Previous Data) that is stored in frame memory 15 corresponding to the M frame input image data (Current Data) that will after this show is obtained and is emphasized operational data.And, utilize subtraction device 14a to try to achieve the differential data that this emphasizes operational data and the M frame input image data that after this shows.
At this moment, control CPU12D is taken into the temperature detection data from temperature sensor 20, utilizes control CPU12D will switch selection and offers corresponding to the coefficient switch-over control signal of the some usefulness among the multiplying factor alpha 1～α 4 of these temperature detection data and emphasize transformation component 14D.Here, temperature detection data instance multiplying coefficient as below 15 ℃ the time is α 1 (＞α 2), the multiplying coefficient is α 2 (＞α 3) greater than 15 ℃ but below 25 ℃ the time, and the multiplying coefficient is α 3 (＞α 4) greater than 25 ℃ but below 35 ℃ the time, the multiplying coefficient is α 4 (=1) during greater than 35 ℃.
According to the temperature detection data, be used to when the handoff factor control signal of controlling CPU12D is switched among these multiplying factor alpha 1～α 4 any one, utilize multiplicative operator 14b that described differential data be multiply by some among multiplying factor alpha 1～α 4, utilize adder calculator 14c with this multiplying data that obtain and the M frame input image data addition that after this shows, the data that this additive operation obtains are as emphasizing that transform data is provided for liquid-crystal controller 16.Therefore, when input image data is the vision signal of TSC-system formula (60Hz), even the temperature of display panels 17 changes, also can the optical response (comprising the characteristic with temperature correlation) of display panels 17 be compensated, show with the image of the high-quality screen that do not have image retention and tail shadow.
And when detecting the vision signal of pal mode or SECAM-system formula (50Hz), utilize control CPU12D to send the indication of the input image data of pal mode or SECAM-system formula (50Hz) being emphasized conversion process to emphasizing transformation component 14D in video signal detection portion 10.In this case, be used to send indication about reference OS table memory (ROM) 13b from the parameter switch-over control signal of controlling CPU12D.And utilize operational part 14d, read corresponding (promptly according to this comparative result appointment) the OS parameter of comparative result (grey scale change) with the M frame input image data (Current Data) that more after this shows and the M-1 frame input image data (Previous Data) that is stored in frame memory 15 from OS parameter storage (ROM) 13, try to achieve and emphasize operational data.And, utilize subtraction device 14a to try to achieve the differential data that this emphasizes operational data and the M frame input image data that after this shows.
At this moment, control CPU12D is taken into the temperature detection data from temperature sensor 20, will be used for switching selection by control CPU12D and offer corresponding to the switch-over control signal of some coefficients of the multiplying factor beta 1～β 4 of these temperature detection data and emphasize transformation component 14D.Here, temperature detection data instance multiplying coefficient as below 15 ℃ the time is α 1 (＞α 2), the multiplying coefficient is α 2 (＞α 3) greater than 15 ℃ but below 25 ℃ the time, the multiplying coefficient is α 3 (＞α 4) greater than 25 ℃ but below 35 ℃ the time, the multiplying coefficient is α 4 (=1) during greater than 35 ℃.
When the coefficient switch-over control signal that comes according to temperature detection data utilization control CPU12D switches some among these multiplying factor alpha 1～α 4, utilize multiplicative operator 14b that described differential data be multiply by some among multiplying factor alpha 1～α 4, long-pending and the M frame input image data addition that after this shows that utilizes adder calculator 14c that this multiplying is obtained, the data that this additive operation obtains are as emphasizing that transform data is provided for liquid-crystal controller 16.
Here, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), as mentioned above, OS parameter in OS table memory (ROM) 13b is than the little value of OS parameter in OS table memory (ROM) 13a, even therefore the temperature of display panels 17 changes, optical response (characteristic of change and temperature correlation) to display panels 17 compensates, just can suppress the generation of image retention and tail shadow, and can prevent that owing to the conversion of excessively emphasizing to view data causes the generation of video noise, the image that can carry out high-quality screen shows.
Like this, in example 4, OS table memory (ROM) 13b of reference when OS table memory (ROM) 13a of reference and vision signal that input image data is pal mode or SECAM-system formula (50Hz) when possessing input image data and be the vision signal of TSC-system formula (60Hz); Vision signal according to described detected TSC-system formula (60Hz), the vision signal of pal mode or SECAM-system formula (50Hz), use is from OS table memory (ROM) 13a, the OS parameter of reading in 13b some, use the 4 pairs of input image datas of the corresponding multiplying factor alpha of temperature detection data 1～α that obtain with temperature sensor 20 to emphasize the variable control of conversion degree simultaneously, therefore can implement the suitable conversion process of emphasizing corresponding to the signal classification of input image data and the temperature in the device to view data, the image that can carry out high-quality screen shows.
Example 5
Fig. 7 is that reference when to be respectively equipped with input image data be the vision signal of TSC-system formula (60Hz) is adopted in expression, the figure of the example 5 when reference when storage corresponds respectively to the OS table memory (ROM) of OS parameter of each temperature range and vision signal that input image data is PLA standard or SECAM-system formula (50Hz), the structure of the OS table memory (ROM) of the OS parameter of respectively corresponding each temperature range of storage; Fig. 8 is the figure of details that is used for the control CUP of key diagram 7; Fig. 9 is used to illustrate the signal classification (part form) according to input image data and installs the key diagram that interior temperature is switched the action of the OS table memory (ROM) of selecting Fig. 7.
As shown in Figure 7, in example 5, the OS table memory (ROM) 135～138 of reference when OS table memory (ROM) 131～134 of reference and vision signal that input image data is PAL or SECAM-system formula (50Hz) when being provided with input image data and being the vision signal of TSC-system formula (60Hz).And the detection input image data is the vision signal of TSC-system formula (60Hz) or the signal classification of the vision signal of pal mode (50Hz) or SECAM-system formula (50Hz), according to this signal classification be used to temperature in the device that the temperature detection data from temperature sensor 20 obtain, switching some with reference in the OS table memory (ROM) 131～138 carries out the conversion process of emphasizing to view data.
Here, OS parameter in the OS table memory (ROM) 135～138 of reference when input image data is the vision signal of pal mode or SECAM-system formula (50Hz) is the little value of OS parameter in the OS table memory (ROM) 131～134 of reference when being the vision signal of TSC-system formula (60Hz) than input image data.As mentioned above, this is because the vision signal of pal mode or SECAM-system formula (50Hz) is longer than the vision signal frame period of TSC-system formula (60Hz), in order to prevent owing to the excessive generation of emphasizing the video noise that conversion causes, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), little when to be necessary to make to the degree of emphasizing conversion of view data be the vision signal of TSC-system formula (60Hz) than input image data.
In addition, can adopt formation as described below again here, be about to each OS parameter and be stored in the OS table memory (ROM) 131～138 that is provided with respectively respectively, but also each OS parameter can be stored in the different forms field of single OS table memory (ROM), according to switch-over control signal from control CPU12E, utilization is suitably switched reference form field, carries out the switching of OS parameter and selects, and tries to achieve and emphasizes transform data.
In addition, in OS table memory (ROM) 131～138, as mentioned above, when the list data number is 256 gray scales of 8, can have OS parameter (measured value) to whole 256 gray shade scales, but also can be for example as shown in Figure 16, only store 9 * 9 OS parameters (measured value) of 9 representative gray scales of the gray scale of per 32 grades in advance, to the transform data of emphasizing in addition, can utilize computings such as linear interpolation to try to achieve from above-mentioned measured value, with such formation, can suppress the memory capacity of OS table memory (ROM) 131～138.
And temperature sensor 20 preferably is arranged in the display panels 17 according to its original purpose, but this structurally is difficult, therefore also can be arranged on the place of close display panels 17 to greatest extent.In addition, temperature sensor 20 also can be provided with a plurality of corresponding to each position of display panels 17 and be not limited to one.When being provided with a plurality of temperature sensor 20, also result's that can average each temperature sensor 20 is detected mean value uses as the temperature detection data, the testing result that changes any one big temperature sensor 20 can also be used as the temperature detection data.
Here, each OS table memory (ROM) 131～138 as shown in Figure 9, according to the temperature detection data of temperature sensor 20 switch, reference.Form such structure here, promptly corresponding to the temperature in the device be for example below 15 ℃, greater than 15 ℃ but below 25 ℃, greater than 25 ℃ but below 35 ℃, greater than the temperature range of 35 ℃ of four-stages, each OS table memory (ROM) 131～138 is set, but can certainly prepare, or the OS parameter of 5 stages or above temperature range corresponding to 3 stages or following.
Illustrate that with Fig. 8 temperature detection data that indication obtains corresponding to such temperature sensor 20 switch the structure of the control CPU12E that selects each OS table memory (ROM) 131～138 below.Promptly the control CUP12E as control device has threshold value judegment part 12a, control signal efferent 12c.
In a single day threshold value judegment part 12a accepts the temperature detection data from temperature sensor, just its switching temperature (threshold temperature) Th1, Th2, Th3 with the regulation that for example is predetermined is compared.Here, switching temperature (threshold temperature) Th1, Th2, Th3 are for example 15 ℃, 25 ℃, 35 ℃, with the temperature in the device be below 15 ℃, than 15 ℃ big but below 25 ℃, than 25 ℃ big but export in the differentiation result below 35 ℃ or more than 35 ℃.
The 12c of control signal portion will be corresponding to the switch-over control signal output of other testing result of any class signal in the vision signal of vision signal, pal mode or the SECAM-system formula (50Hz) of the TSC-system formula (60Hz) that is obtained by vision signal classification test section 10 with the differentiation result who is obtained by threshold value judegment part 12a.Promptly in case receive the differentiation result that signal classification testing result and threshold value judegment part 12a from vision signal classification test section 10 obtain, just with switch-over control signal indication according to this signal classification and temperature detection data, with reference to which the indication in the OS table memory (ROM) 131～138.
In this case, control signal efferent 12c can by will be for example input image data be that the situation of TSC-system formula (60Hz) is identified as " 0 ", be identified as the recognition data of " 1 " for the situation of pal mode or SECAM-system formula (50Hz), with be that situation below 15 ℃ is identified as " 00 " for example from the temperature detection data of temperature sensor 20, greater than 15 ℃ but be identified as " 01 " in the situation below 25 ℃, greater than 25 ℃ but be identified as " 10 " in the situation below 35 ℃, the recognition data that situation greater than 35 ℃ is identified as " 11 " is made up, with 3 switch-over control signal indications any one, carry out the conversion of emphasizing of view data with reference to 8 OS table memories (ROM) 131～138.
In such structure, as mentioned above, in case vision signal classification test section 10 detects for example vision signal of TSC-system formula (60Hz), just send the vision signal notice that detects TSC-system formula (60Hz) by 10 pairs of control of vision signal classification test section CPU12E.At this moment, utilize control CPU12E that conduct is emphasized that the transformation component 14E that emphasizes of shift means sends the indication of input image data being emphasized conversion process.In this case, according to the temperature detection data from threshold value judegment part 12a is below 15 ℃, greater than 15 ℃ but below 25 ℃, greater than 25 ℃ but below 35 ℃, or greater than 35 ℃ differentiation result, some switch-over control signals of the OS table memory (ROM) 131～134 of reference when utilizing control signal efferent 12c output to be used for selecting the indication input image data for the vision signal of TSC-system formula (60Hz).
Here, at the temperature detection data instance that obtains from temperature sensor 20 as below 15 ℃ the time, send indication with reference to OS table memory (ROM) 131, greater than 15 ℃ but below 25 ℃ the time, send indication, greater than 25 ℃ but below 35 ℃ the time, send indication with reference to OS table memory (ROM) 133 with reference to OS table memory (ROM) 132, greater than below 35 ℃ the time, send indication with reference to OS table memory (ROM) 134.
And, what this indication was accepted in utilization emphasizes transformation component 14E, from the OS table memory (ROM) 131～134 of described selection indication some, read (promptly by this comparative result appointment) OS parameter corresponding to the comparative result (grey scale change) of the M frame input image data (Current Data) that after this shows and the M-1 frame input image data (Previous Data) that is stored in frame memory 15, try to achieve according to this OS parameter of reading and to emphasize transform data, offer liquid-crystal controller 16.Therefore when input image data is the vision signal of TSC-system formula (60Hz), even the temperature of display panels 17 changes, compensate by optical response (comprising characteristic), can not have the image of the high-quality screen of image retention and tail shadow to show with temperature correlation to display panels 17.
In case horizontal signal classification test section 10 detects the vision signal of pal mode or SECAM-system formula (50Hz), send the indication of the input data of pal mode or SECAM-system formula (50Hz) being emphasized conversion process with regard to utilizing control CPU12E.In this case, as mentioned above, according to the temperature detection data from threshold value judegment part 12a is below 15 ℃, greater than 15 ℃ but below 25 ℃, greater than 25 ℃ but at 35 ℃ or greater than 35 ℃ differentiation result, some switch-over control signals of the OS table memory (ROM) 135～138 of reference when utilizing control signal efferent 12c output to be used for selecting the indication input image data for the vision signal of pal mode or SECAM-system formula (50Hz).
Here, from the temperature detection data instance of temperature sensor 20 as below 15 ℃ the time, indicate it with reference to OS table memory (ROM) 135, but below 25 ℃ the time greater than 15 ℃, indicate it with reference to OS table memory (ROM) 136, greater than 25 ℃ but below 35 ℃ the time, indicate it with reference to OS table memory (ROM) 137, greater than below 35 ℃ the time, indicate it with reference to OS table memory (ROM) 138.
And, the transformation component 14E that emphasizes that this indication is accepted in utilization reads (promptly according to this comparative result appointment) the OS parameter corresponding to the comparative result (grey scale change) of the M frame input image data (Current Data) that after this shows and the M-1 frame input image data (Previous Data) that is stored in frame memory 15 from the OS table memory (ROM) 135～138 of selected indication some, try to achieve according to this OS parameter of reading and to emphasize transform data, offer liquid-crystal controller 16.
Here, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), as mentioned above, OS parameter in the OS table memory (ROM) 135～138 is than the little value of OS parameter in the OS table memory (ROM) 131～134 of correspondence, even therefore the temperature of display panels 17 changes, also owing to the optical response (comprising the characteristic with temperature correlation) to display panels 17 compensates, suppressed the generation of image retention and tail shadow, and can prevent that the image that carries out high-quality screen shows owing to view data excessive emphasized the video noise that conversion produces.
Like this, in example 5, reference when being provided with input image data and being the vision signal of TSC-system formula (60H), corresponding to a plurality of OS table memories (ROM) 131～134 from the temperature detection data of temperature sensor 20, and input image data reference when being the vision signal of pal mode or SECAM-system formula (50H), corresponding to a plurality of OS table memories (ROM) 135～138 from the temperature detection data of temperature sensor 20, according to input image data is that the vision signal or the input image data of TSC-system formula (60Hz) is the signal classification of the vision signal of pal mode or SECAM-system formula, and be used to temperature in the device that the temperature detection data from temperature sensor 20 obtain, switching is some with reference to OS table memory (ROM) 131～138, carry out the conversion of emphasizing to view data, therefore make view data is implemented to become possibility corresponding to the suitable conversion process of emphasizing of the temperature in signal classification and the device, thereby the image that can carry out high-quality screen shows.
Example 6
Figure 10 is when to be illustrated in input image data be the vision signal of TSC-system formula (60Hz) and the figure of input image data example 6 under the common OS of the use parameter situation when being the vision signal of pal mode or SECAM-system formula (50Hz), Figure 11 is the figure of details of the control CPU of expression Figure 10, and Figure 12 is used to illustrate according to the signal classification of input image data and the temperature in the device switch the key diagram of the action of the OS table memory (ROM) of selecting Figure 10.
As shown in figure 10, in example 6, in the OS table memory (ROM) 131～138 shown in Figure 7, also can reference example when input image data is the vision signal of pal mode or SECAM-system formula (50Hz) such as 4 OS table memories (ROM) 131～134 of view data reference when being the vision signal of TSC-system formula (60Hz), temperature in the device that obtains according to the signal classification that obtains by vision signal classification test section 10 and by temperature sensor 20, switching is some with reference to OS table memory (ROM) 131～134, carries out the conversion process of emphasizing to view data.
Like this,, the OS table memory (ROM) 131～134 of reference is carried out the CPU12F of switching controls, form structure shown in Figure 11 according to the detection data of the temperature in the signal classification of input image data and the device.Be that CPU12F has threshold value judegment part 12a, control signal efferent 12b, signal classification operational formula storage part 12e, operational part 12f.
Threshold value judegment part 12a utilizes switching temperature (threshold temperature) Th1, Th2, the Th3 of operational part 12f temperature data that obtains that calculates and the regulation that is predetermined to compare.Here, Th1, Th2, Th3 are for example 15 ℃, 25 ℃, 35 ℃.The comparative result that control signal efferent 12b obtains according to threshold value judegment part 12a, generation makes it select some switch-over control signals that carries out with reference to usefulness of OS table memory (ROM) 131～134 to as emphasizing that the transformation component 14F that emphasizes of shift means indicates.
In signal classification operational formula storage part 12e, storage is to the operational formula of the temperature detection data that obtain from temperature sensor 20 plus-minus to the computings such as setting of the signal classification decision of each input image data.Operational part 12f uses the temperature detection data enforcement interpolation operation of operational formula to being obtained by temperature sensor 20 of reading from signal classification computing storage part 12e according to utilizing vision signal classification test section 10 detected signal categorical datas.
In such structure, for example shown in Figure 12, when input image data is the vision signal of TSC-system formula (60Hz), if below switching temperature Th1 (=15 ℃), then control CPU12F and select OS table memory (ROM) 131 to carry out the indication of reference to emphasizing that transformation component 14F sends by the temperature in the temperature sensor 20 detected devices.By means of this, emphasize that transformation component 14F uses the OS parameter be stored in OS table memory (ROM) 131 to carry out the conversion process of emphasizing to input image data.
In addition, if by the temperature in the temperature sensor 20 detected devices is greater than Th1 (=15 ℃) and below switching temperature Th2 (=25 ℃), control CPU12F selects OS table memory (ROM) 132 to carry out the indication of reference to emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 132, carries out the conversion process of emphasizing to input image data.
Also have, if by the temperature in the temperature sensor 20 detected devices is greater than Th2 (=25 ℃) and below switching temperature Th3 (=35 ℃), control CPU12F selects OS table memory (ROM) 133 to carry out the indication of reference to emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 133, carries out the conversion process of emphasizing to input image data.
And if the temperature in the temperature sensor 20 detected devices is controlled CPU12F and is just selected OS table memory (ROM) 133 to carry out the indication of reference to emphasizing that transformation component 14F sends greater than Th3 (=35 ℃).By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 133, carries out the conversion process of emphasizing to input image data.
On the other hand, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), as mentioned above, in order to prevent because of the excessive generation of emphasizing the video noise that conversion causes, little when the conversion degree of emphasizing of the view data when to be necessary to make input image data be the vision signal of pal mode or SECAM-system formula (50Hz) is the vision signal of TSC-system formula (60Hz) than input image data.Therefore, in order to revise the degree that this emphasizes conversion, at operational part 12f, the operational formula that use is read by signal classification operational formula storage part 12e, the temperature detection data that temperature sensor 20 is obtained are implemented the computing (for example adding 5 ℃ here) of regulation, output to threshold value judegment part 12a thereafter.In addition, here be not limited to add 5 ℃, also can be below 4 ℃ or more than 6 ℃, be to set arbitrarily according to the optical response of display panels 17.
Therefore, when the input characteristics data are the vision signal of pal mode or SECAM-system formula (50Hz), if temperature is below 10 ℃ in the temperature sensor 20 detected devices, then controls CPU12F and select OS form stores portion (ROM) 131 to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory 131, carries out the conversion process of emphasizing to input image data.
In addition, if temperature is greater than 10 ℃ and below 20 ℃ in the temperature sensor 20 detected devices, then controls CPU12F and select OS form stores portion (ROM) 132 to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory 132, carries out the conversion process of emphasizing to input image data.
Also have, if temperature is greater than 20 ℃ and below 30 ℃ in the temperature sensor 20 detected devices, control CPU12F just selects OS form stores portion (ROM) 133 to carry out the indication of reference to emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory 133, carries out the conversion process of emphasizing to input image data.
Then, if temperature is greater than 30 ℃ in the temperature sensor 20 detected devices, control CPU12F just selects OS form stores portion (ROM) 134 to carry out the indication of reference to emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory 134, carries out the conversion process of emphasizing to input image data.
Like this, in example 6, the temperature detection data that temperature sensor 20 is obtained are implemented the computing of regulation, then it are compared with predetermined regulation switching temperature Th1, Th2, Th3, generate to be used to switch OS parameter control signal.Be under the situation of vision signal of TSC-system formula (60Hz) and input image data is under the situation of pal mode or SECAM-system formula (50Hz) promptly at input image data, to the OS table memory (ROM) 131～134 of reference carry out with reference to the time switching temperature (temperature in the device) suitably change, therefore can implement to emphasize conversion process by shared OS table memory (ROM) 131～134 to the input image data of any signal classification (broadcast format), input image data is the vision signal of TSC-system formula (60Hz), during in the vision signal of pal mode or SECAM-system formula (50Hz) any one, compare with the be arranged situation of OS table memory (ROM) of branch, can suppress the memory capacity of storer.
In addition, under identical temperature conditions, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), the little OS parameter value of using when using than input image data of OS parameter to the vision signal of TSC-system formula (60Hz), make carry out view data emphasize to be for conversion into possibility, therefore, under the situation of the vision signal of pal mode or SECAM-system formula (50Hz), can prevent owing to the deterioration of excessively emphasizing the image quality that video noise that conversion causes produces to view data.
In addition, can certainly form such structure, to be stored in corresponding to a plurality of OS parameters of each temperature range exactly in the OS table memory (ROM) 131～134 that is provided with respectively, but also can be stored in the different forms field of an OS table memory (ROM), according to the switch-over control signal that comes from control CPU12F, suitably switch the form field of reference, switch with this and select the OS parameter, try to achieve and emphasize transform data.
In addition, in OS table memory (ROM) 131～134, as mentioned above, when the video data number is 256 gray scales of 8, also can have OS parameter (measured value) to whole 256 gray scales, but also can be as shown in Figure 16, only store 9 * 9 OS parameters (measured value) for 9 representative gray scales of per 32 gray scales, the transform data of emphasizing in addition other gray scales, can utilize computings such as linear interpolation to try to achieve from above-mentioned measured value, utilize such formation, can suppress the memory capacity of OS table memory (ROM) 131～134.
Example 7
Figure 13 is the figure of the example 7 of expression when possessing other structures as the control CPU of Figure 10.
The control CPU12G of example 7, as shown in figure 13, have the signal classification threshold temperature data store 12i of storage for regulation switching temperature (threshold temperature) data of the signal classification decision of each input image data, signal classification according to input picture, the switching temperature Th1 that reads from signal classification threshold temperature data store 12i, Th2, Th3, with itself and the temperature detection data that obtain by temperature sensor 20 threshold value judegment part 12j relatively, and, generate and make the some control signal efferent 12b that carries out with reference to the switch-over control signal of usefulness that emphasize in the transformation component selection OS table memory (ROM) 131～134 according to the comparative result that obtains by this threshold value judegment part 12j.
In such structure, when input image data is the vision signal of TSC-system formula (60Hz), if the temperature in the temperature sensor 20 detected devices is below the switching temperature Th1 (=15 ℃), then controls CPU12G and select OS table memory (ROM) 131 to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 131, carries out the conversion process of emphasizing to input image data.
In addition, if temperature is greater than switching temperature Th1 (=15 ℃) and below switching temperature Th2 (=25 ℃) in the temperature sensor 20 detected devices, then controls CPU12G and select OS table memory (ROM) 132 to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 132, carries out the conversion process of emphasizing to input image data.
In addition, if temperature is greater than switching temperature Th2 (=25 ℃) and below switching temperature Th3 (=35 ℃) in the temperature sensor 20 detected devices, then controls CPU12G and select OS table memory (ROM) 133 to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 133, carries out the conversion process of emphasizing to input image data.
In addition, if temperature is greater than switching temperature Th3 (=35 ℃) in the temperature sensor 20 detected devices, then controls CPU12G and select OS table memory (ROM) 134 to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 134, carries out the conversion process of emphasizing to input image data.
On the other hand, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), as mentioned above, in order to prevent that owing to the excessive generation of emphasizing the video noise that conversion causes the conversion degree of emphasizing that is necessary to make the view data under the same terms is than little when input image data is the vision signal of TSC-system formula (60Hz).Therefore, in order to revise the degree that this emphasizes conversion, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), threshold value judegment part 12j use the switching temperature Th ' 1 that reads from signal classification threshold temperature data store 12i (＜Th1), Th ' 2 (＜Th2), Th ' 3 (＜Th3), the temperature detection data that temperature sensor 20 is obtained compare differentiation, and its result is outputed to control signal efferent 12b.
By means of this, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), if temperature is below the Th ' 1 (=10 ℃) in the temperature sensor 20 detected devices, then controls CPU12G and select OS table memory (ROM) 131 to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 131, carries out the conversion process of emphasizing to input image data.
In addition, if temperature is greater than Th ' 1 (=10 ℃) and below switching temperature Th ' 2 (=20 ℃) in the temperature sensor 20 detected devices, then controls CPU12G and select OS table memory (ROM) 132 to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 132, carries out the conversion process of emphasizing to input image data.
In addition, if temperature is greater than Th ' 2 (=20 ℃) and below switching temperature Th ' 3 (=30 ℃) in the temperature sensor 20 detected devices, then controls CPU12G and select OS table memory (ROM) 133 to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 133, carries out the conversion process of emphasizing to input image data.
If temperature is greater than Th ' 3 (=30 ℃) in the temperature sensor 20 detected devices, then controls CPU12G and select OS table memory (ROM) 134 to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 134, carries out the conversion process of emphasizing to input image data.
Like this, in example 7, use is to the switching temperature (threshold temperature) of the signal classification regulation of each input image data, the temperature detection data that temperature sensor 20 is obtained compare differentiation, generate the switch-over control signal that is used to select OS table memory (ROM) 131～134 that should reference with this.Promptly owing to be under the situation of vision signal of TSC-system formula (60Hz) at input image data and input image data is under the situation of vision signal of pal mode or SECAM-system formula (50Hz), can suitably change switching the switching temperature (temperature in the device) of selecting OS table memory (ROM) 131～134, therefore can use OS table memory (ROM) 131～134 to implement to emphasize conversion process jointly to other input image data of any class signal, at input image data is TSC-system formula (60Hz) vision signal, during any in the vision signal of pal mode or SECAM-system formula (50Hz), compare with the situation that OS table memory (ROM) is set respectively, can suppress the memory capacity of storer.
In addition, under identical temperature conditions, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), can use the little OS parameter of numerical value than the OS parameter of using under the situation of input image data as the vision signal of TSC-system formula (60Hz), carry out the conversion of emphasizing of view data, therefore can prevent owing to the conversion of excessively emphasizing to view data causes taking place the deterioration that video noise causes image quality.
Example 8
Figure 14 is illustrated under the situation of vision signal that input image data is a TSC-system formula (60Hz) and the only common figure that uses the example 8 under a part of OS parameter situation under the situation of the vision signal of pal mode or SECAM-system formula (50Hz).
As shown in figure 14, in example 8, adopt structure as described below, be that the situation of vision signal of TSC-system formula (60Hz) and situation that input image data is the vision signal of pal mode or SECAM-system formula (50Hz) are when blocking arbitrary situation promptly at input image data, OS table memory (ROM) 13b of reference when OS table memory (ROM) 13a of reference and vision signal that input image data is pal mode or SECAM-system formula (60Hz) when input image data all also being set being the vision signal of TSC-system formula (60Hz) outside shared OS table memory (ROM) 13c～13e, these OS table memories (ROM) 13a～13e according to the switching temperature of each input signal classification regulation is switched reference, is implemented to emphasize the structure of conversion to view data.
Here, at each special-purpose OS table memory (ROM) 13a, 13b, than normal temperature under the high situation, storage is used in the OS parameter of emphasizing conversion of view data for example.In addition, to OS table memory (ROM) 13a～13e according to the switching temperature of each signal classification regulation is switched with reference to the time, can carry out according to the switch-over control signal of the control CPU12F (or 12G) that illustrates from Figure 11 (or Figure 13).
In such structure, when input image data is the vision signal of TSC-system formula (60Hz), if temperature is below 15 ℃ in the temperature sensor 20 detected devices, control CPU12F just selects OS table memory (ROM) 13c to carry out the indication of reference to emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 13c, carries out the conversion process of emphasizing to input image data.
In addition, if temperature is greater than 15 ℃ and below 25 ℃ in the temperature sensor 20 detected devices, then controls CPU12F and select OS table memory (ROM) 132 to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 13d, carries out the conversion process of emphasizing to input image data.
In addition, if temperature is greater than 25 ℃ and below 35 ℃ in the temperature sensor 20 detected devices, then controls CPU12F and select OS table memory (ROM) 13e to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 13e, carries out the conversion process of emphasizing to input image data.
In addition, if temperature is greater than 35 ℃ in the temperature sensor 20 detected devices, then controls CPU12F and select OS table memory (ROM) 13a to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory (ROM) 13a, carries out the conversion process of emphasizing to input image data.
On the other hand, when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), if temperature is below 10 ℃ the time in the temperature sensor 20 detected devices, control CPU12F is just to emphasizing that transformation component 14F sends the indication that the selection 13c of OS form stores portion (ROM) carries out reference.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory 13c, carries out the conversion process of emphasizing to input image data.
In addition, if temperature is greater than 10 ℃ and below 20 ℃ in the temperature sensor 20 detected devices, then controls CPU12F and select the 13d of OS form stores portion (ROM) to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory 13d, carries out the conversion process of emphasizing to input image data.
Also have,, then control CPU12F and select the 13e of OS form stores portion (ROM) to carry out the indication of reference emphasizing that transformation component 14F sends if temperature is greater than 20 ℃ and below 30 ℃ in the temperature sensor 20 detected devices.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory 13e, carries out the conversion process of emphasizing to input image data.
And, if temperature is greater than 30 ℃ in the temperature sensor 20 detected devices, then controls CPU12F and select the 13b of OS form stores portion (ROM) to carry out the indication of reference emphasizing that transformation component 14F sends.By means of this, emphasize that transformation component 14F uses the OS parameter that is stored in OS table memory 13b, carries out the conversion process of emphasizing to input image data.
Like this, in example 8, form structure as described below, promptly input image data be TSC-system formula (60Hz) vision signal situation and be outside common OS table memory (ROM) 13c～134e that uses of situation of vision signal of pal mode or SECAM-system formula (50Hz) to input image data, also be provided with OS table memory (ROM) 13a of the special use of reference when input image data is the vision signal of TSC-system formula (60Hz), and OS table memory (ROM) 13b of special use when input image data is the vision signal of pal mode or SECAM-system formula (50Hz), switch with reference to these OS table memories (ROM) 13a～13e according to switching temperature (temperature in the device) each input signal classification regulation, therefore enforcement can use OS table memory (ROM) 13c～13e to carry out the suitable conversion process of emphasizing to the structure of emphasizing conversion of these view data jointly.
In addition, though a plurality of OS parameters corresponding to each signal classification and each temperature range can be stored among OS table memory (ROM) 13a～13e that is provided with respectively, but also can form such structure, be about to it and be stored in the different forms field of independent OS table memory (ROM), according to the switch-over control signal that comes from control CPU12F (12G), by the form field of suitable switching reference, switch and select the OS parameter, try to achieve the structure of emphasizing transform data.
In addition, in OS table memory (ROM) 13a～13e, as mentioned above under the video data number is 8 the situation of 256 gray shade scales, also can have OS parameter (measured value) to whole 256 gray shade scales, but for example as shown in Figure 16, only store 9 * 9 OS parameters (measured value) in advance for 9 representative gray scales of per 32 gray shade scales, the transform data of emphasizing in addition gray scale, can utilize computings such as linear interpolation to try to achieve, can suppress the memory capacity of OS table memory (ROM) 13a～13e with such structure from above-mentioned measured value.
In addition, in above-mentioned each example, the situation that vision signal classification test section 10 is differentiated the broadcast standard (video format) of this vision signal automatically according to the vision signal of input describes, but be not limited thereto, also can be that vision signal classification test section 10 receives the vision signal that users utilize for example remote control dress device etc. to send and selects indication, select indication according to this, detect the broadcast standard of vision signal.No matter under any situation,, just can access same effect as long as can detect the broadcast standard (video format) of vision signal.But the structure of differentiating automatically as above-mentioned each example is compared with the each structure of all oneself operating of user, has alleviated burden for users.
In addition, in above-mentioned each example, the structure that can often change the broadcast standard that shows in liquid crystal TV set is illustrated, but is not limited to this.For example, also can be only can change in the scheduled period when dispatching from the factory.Under the situation of this structure, by the broadcast standard of the demonstration of change liquid crystal TV set in during this period, the liquid crystal TV set that shows the vision signal that certain plays standard after making during above-mentioned with during above-mentioned after show that liquid crystal TV sets of the vision signal of other broadcast standards can be general.In addition, after during above-mentioned, even import under the situation of input image data of any broadcast standard (video format), also can carry out the conversion of emphasizing of this input image data, often to make display panels in specified time limit, reach the transmitance of this input image data regulation, realize that high-quality image shows.Like this, even the time period that the broadcast standard that shows on liquid crystal TV set can change is when restricted, liquid crystal TV set also can show the view data of multiple broadcast standard, and, corresponding to input image data is the vision signal of the 1st broadcast standard or the vision signal of the 2nd broadcast standard different with the vision signal vertical frequency of the 1st broadcast standard, if can carry out variable control to the conversion degree of emphasizing of described view data, just can obtain identical effect.But,, just can offer the user with having multi-purpose liquid crystal TV set if as above-mentioned each example, can often change.
Also have, in above-mentioned example, can receive the television broadcasting signal of multiple broadcast standard and the liquid crystal TV set that shows illustrates as an example with liquid crystal TV set, but above-mentioned liquid crystal TV set can video signal displayed also can be the vision signal that can come from the replay device of the recording medium playback of video signal of storage television broadcasting signal, also can be can be from the reset vision signal of replay device of this vision signal of the recording medium of the vision signal of for example DVD etc., the storage video format identical with television broadcast video signal.In addition, in this case, in recording medium, vision signal classification test section 10 also can detect the broadcast standard (video format) of vision signal according to this information of reading from this recording medium with the information stores of broadcast standard (video format) of expression vision signal.Under any circumstance, all be not limited to the signal source of outputting video signal, liquid crystal TV set can video signal displayed video format (broadcast standard) also be various, if can be the vision signal of the 1st broadcast standard or the vision signal of the 2nd broadcast standard different according to input image data with the vision signal vertical frequency of the 1st broadcast standard, the conversion degree of emphasizing to described view data is carried out variable control, just can obtain identical effect.
In addition, in above-mentioned example, as an example, for example to all images of 1 frame (1 コ マ) of view data 1 image duration of view data write the driving method of scanning, just with 1 vertical during corresponding to driving method during (1 image duration) vertical demonstration with 1, situation about adopting with liquid crystal TV set is that example describes, but is not limited to this.For example liquid crystal TV set also can adopt be divided into for 1 image duration display image during (image show during) with show slinkingly show (for example blank screen demonstration) during driving method.
In addition, in above-mentioned each example, will describe as an example corresponding to the situation that transform data outputs to liquid-crystal controller 16 of emphasizing of the combination of the input image data of input image data before 1 frame and present frame, but be not limited to this.For example be not only the input image data before 1 frame, also can be with reference to than the 1 frame input image data of front (for example the input image data before 2 frames etc.) more, transform data is emphasized in decision.Under any circumstance, if decision is emphasized just can access same effect by transform data with reference to the input image data before at least 1 frame.But transform data is emphasized in former in order to reference input image data decision, needs the more frame memory of large storage capacity.Thereby, requiring to cut down under the situation of memory capacity, as above-mentioned each example, preferably in the input image data of above-mentioned each frame, only with reference to 1 frame before input image data and the input image data of present frame, transform data is emphasized in decision.
Also have, in above-mentioned each example, to emphasize that with reference to the input image data before 1 frame transform data outputs in the liquid-crystal controller 16, but also can replace actual input, input image data before 1 frame, by writing the input image data before 1 frame, the actual grey level who reaches of prediction liquid crystal display pixel carries out reference with the view data (Previous Data) of this predicted value before as above-mentioned 1 frame.In addition, in this case, in order to predict the gray scale that reaches, also with reference to the input image data before 1 frame.In either case, if according to the input image data of input image data before at least 1 frame and present frame, decision is emphasized can obtain same effect by transform data.
In addition, in above-mentioned each example, to emphasize that (14A～14F) emphasizes that with reference to the OS parameter (emphasizing transformation parameter) that is stored in OS table memory (ROM13～13e131～138) situation of conversion describes as an example to transformation component, but is not limited to this.For example, emphasize transformation component also can utilize with the input image data (Current Data) of M frame be stored in the quadratic function f function calculation such as (Current Data, Previous Datas) of the M-1 frame input image data (Previous Data) of frame memory 15 and go out the transform data of emphasizing that optical response to display panels (17) compensates as parameter.
In above-mentioned each example, (12A～12G), emphasize that (14A～14F), frame memory (15) all are that the situation of hardware is illustrated as an example to transformation component with vision signal classification test section (10), control CPU, carry out same work but also can utilize computing machine computing means such as (CPU) to carry out the program that is stored in not shown memory storage (storer etc.), realize the function of these parts with this.This program is by this program recording medium of memory allocated, or wired or wireless transfer path etc., transmit to distribute by all paths, on the aforementioned calculation machine, implement.
Also have, the concrete example or the embodiment that are implemented in the best example that enforcement the present invention uses make more clearly example of technology contents of the present invention, only be defined in so concrete example, should not carry out narrow definition to it, spirit of the present invention and below various changes can be arranged in the claim scope put down in writing.
Industrial practicality
Adopt the present invention, then can suitably improve the liquid crystal of the view data that can show various broadcast modes Therefore the optical response that shows panel can be applicable to well and use display panels to show image Liquid crystal TV set.

Claims (24)

1. liquid crystal TV set, according at least 1 vertical during before view data and current view data during vertical, the view data that offers display panels is emphasized conversion, compensate the optical response of described display panels with this, it is characterized in that
Described liquid crystal TV set can show the view data of multiple broadcast standard, and possesses
Detect input image data and be the 1st play standard vision signal or with the 1st play the vision signal vertical frequency of standard different the 2nd play standard vision signal other signal classification detection means of class signal and
Carry out the conversion of emphasizing of described view data, make described display panels reach the shift means of emphasizing of described view data regulation transmitance in during regulation;
According to the testing result of described signal classification detection means, the described conversion degree of emphasizing of the described view data of shift means of emphasizing is carried out variable control.
2. according to the described liquid crystal TV set of claim 1, it is characterized in that,
Possess storage by current view data during vertical the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1;
The described shift means of emphasizing has
Use the described transformation parameter of emphasizing, to described view data implement to emphasize computing operational part and
According to the testing result of described signal classification detection means, the output data of described operational part be multiply by the multiplying portion of different coefficients.
3. liquid crystal TV set according to claim 2 is characterized in that,
The coefficient settings of described multiplying portion is, is that the 2nd the described input image data of coefficient ratio when playing the vision signal of standard is that the 1st coefficient when playing the vision signal of standard is little at described input image data.
4. liquid crystal TV set according to claim 1, it is characterized in that, possess described input image data and be the 1st and play reference under the situation of vision signal of standard, storage according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment and
Described input image data is the 2nd to play reference under the situation of vision signal of standard, and storage is the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1 according to current view data during vertical;
The described shift means of emphasizing has the testing result that obtains according to described signal classification detection means, uses the described transformation parameter of reading from described table memory of emphasizing, described view data is implemented to emphasize the operational part of computing.
5. liquid crystal TV set according to claim 4 is characterized in that,
The described value of emphasizing the parameter parameter and is that the 1st parameter of reading when playing the vision signal of standard is compared at described input image data, is that the 2nd parameter of reading when playing the vision signal of standard is less at described input image data.
6. liquid crystal TV set according to claim 1 is characterized in that,
The temperature detection means that also possess the temperature in the pick-up unit;
The described testing result of emphasizing that shift means obtains according to described temperature detection means changes the conversion degree of emphasizing to described view data.
7. liquid crystal TV set according to claim 6 is characterized in that,
Also possess storage according to current view data during vertical the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1;
The described shift means of emphasizing has
Use the described transformation parameter of emphasizing, to described view data implement to emphasize computing operational part and
Detect the testing result that the testing result that obtains and described temperature detection means obtain, the multiplying portion of the output data of described operational part be multiply by different coefficients according to described signal classification detection means.
8. liquid crystal TV set according to claim 6 is characterized in that possessing
Described input image data is the 1st to play reference under the situation of standard, storage according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment and
Described input image data is the 2nd to play reference under the situation of standard, and storage is the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1 according to current view data during vertical;
The described shift means of emphasizing has
The testing result that obtains according to described signal classification detection means is used the described transformation parameter of reading from described table memory of emphasizing, to described view data implement to emphasize computing operational part and
Detect the testing result that obtains, the multiplying portion of the output data of described operational part be multiply by different coefficients according to described signal classification detection means.
9. liquid crystal TV set according to claim 6 is characterized in that possessing
Described input image data is the 1st to play reference under the situation of vision signal of standard, storage corresponding to each temperature in the multiple arrangement and according to the temperature of device and according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment and
Described input image data is the 2nd to play reference under the situation of vision signal of standard, storage corresponding to each temperature in the multiple arrangement and according to the temperature of device and according to current view data during vertical the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1;
The described shift means of emphasizing has the testing result that the testing result that obtains according to described signal classification detection means and described temperature detection means obtain, the described transformation parameter of emphasizing that use is read from described table memory is implemented to emphasize the operational part of computing to described view data.
10. liquid crystal TV set according to claim 6 is characterized in that,
Possess storage corresponding in the multiple arrangement each temperature and according to current view data during vertical the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1,
The described shift means of emphasizing has the result who compares with the testing result that described temperature detection means obtain according to the switching temperature of the testing result regulation of utilizing described signal classification detection means to obtain, the described transformation parameter of emphasizing that use is read from described table memory is implemented to emphasize the operational part of computing to described view data.
11. liquid crystal TV set according to claim 10 is characterized in that,
Possess the control device controlled is selected in the described switching of emphasizing transformation parameter;
Described control device has
For the detected temperature data of described temperature inspection means, implement to the regulation computing of the signal classification decision of each described input image data operational part,
The threshold value judegment part that the temperature data that utilizes described operational part to calculate is compared with the defined threshold temperature data that is predetermined and
According to the comparative result that described threshold value judegment part obtains, generate the described transformation parameter of emphasizing is carried out the control signal efferent of the switch-over control signal of switching controls.
12. the described liquid crystal TV set of claim 10 is characterized in that,
Possess the control device controlled is selected in the described switching of emphasizing transformation parameter;
Described control device has
With the detected temperature data of described temperature detection means and the threshold value judegment part that the threshold temperature data of the classification of each described input image data signal regulation are compared and
According to the comparative result that described threshold value judegment part obtains, generate the described transformation parameter of emphasizing is carried out the control signal efferent of the switch-over control signal of switching controls.
13. liquid crystal display control method, have according at least 1 vertical during before view data and current view data during vertical, by the view data that offers display panels is emphasized conversion, compensate the liquid crystal display control method of the optical response of described display panels, it is characterized in that
Described display panels can show the view data of multiple broadcast standard, has following operation:
The view data that detects input is the 1st to play the vision signal of standard, still with the 1st play the 2nd different signal classification of playing the vision signal of standard of the vision signal vertical frequency of standard detect operation and
Carry out the conversion of emphasizing of described view data, make described display panels reach the operation of the transmitance of described view data regulation in during regulation;
According to other testing result of described class signal, the described conversion degree of emphasizing of the described view data of conversion of emphasizing is carried out variable control.
14. liquid crystal display control method according to claim 13 is characterized in that, possesses following operation:
With reference to storage according to current view data during vertical the operation of the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1,
Use described emphasize transformation parameter to described image parameter implement to emphasize computing operation and
According to described signal classification testing result, the output data of described operational part be multiply by the operation of different coefficients.
15. liquid crystal display control method according to claim 13 is characterized in that, possesses following operation:
Described input image data is the 1st to play reference under the situation of vision signal of standard, storage according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation,
Described input image data is the 2nd to play reference under the situation of vision signal of standard, storage according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation and
According to described signal classification testing result, use the described transformation parameter of reading from described table memory of emphasizing, described view data is implemented to emphasize the operation of computing.
16. liquid crystal display control method according to claim 13 is characterized in that, has following operation:
The operation of the temperature in the pick-up unit and
According to the testing result of the temperature in the described device, change the operation of emphasizing the conversion degree of described view data.
17. the described liquid crystal display control method of claim 16 is characterized in that, has following operation:
With reference to storage according to current view data during vertical the operation of the table memory of emphasizing transformation parameter of preceding view data appointment during vertical with 1,
Use the described transformation parameter of emphasizing, to described view data implement to emphasize computing operation and
The testing result that detects according to described signal classification and the testing result of the temperature in the described device, the output data that described computing is obtained multiply by the operation of different coefficients.
18. liquid crystal display control method according to claim 16 is characterized in that, has following operation:
Described input image data is the 1st to play reference under the situation of vision signal of standard, storage according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation,
Described input image data is the 2nd to play reference under the situation of vision signal of standard, storage according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation,
According to described signal classification testing result, use the described transformation parameter of reading from described table memory of emphasizing, to described view data implement to emphasize computing operation and
According to the testing result of the temperature in the described device, the output data that described computing is obtained multiply by the operation of different coefficients.
19. the described liquid crystal display control method of claim 16 is characterized in that, has following operation:
Described input image data is the 1st to play reference under the situation of vision signal of standard, storage corresponding to each temperature of the temperature in the multiple arrangement and according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation,
Described input image data is the 2nd to play reference under the situation of vision signal of standard, storage corresponding to each temperature of the temperature in the multiple arrangement and according to current view data during vertical during vertical with 1 the table memory of emphasizing transformation parameter of preceding view data appointment with reference to operation and
According to the testing result of temperature in other testing result of described class signal and the described device, use the described transformation parameter of reading from described table memory of emphasizing, described view data is implemented to emphasize the operation of computing.
20. liquid crystal display control method according to claim 16 is characterized in that, has following operation:
With reference to storage corresponding to each temperature of the temperature in the multiple arrangement and according to current view data during vertical during vertical with 1 the operation of the table memory of emphasizing transformation parameter of preceding view data appointment and
Comparative result according to the testing result of the switching temperature of utilizing the decision of other testing result of described class signal and the temperature in the described device, the described transformation parameter of emphasizing that use is read from described table memory is emphasized the operation of computing to described view data.
21. the described liquid crystal display control method of claim 20 is characterized in that, has following operation:
To temperature data as the testing result of the temperature in the described device, carry out to the regulation computing of the signal classification decision of each described input image data operation,
The operation that the temperature data of implementing described computing and the defined threshold temperature data that is predetermined are compared and
According to described comparative result, generate the described operation of emphasizing the switch-over control signal of transformation parameter of switching controls.
22. liquid crystal display control method according to claim 21 is characterized in that, has following operation:
The operation that will be compared as the temperature data of the testing result of the temperature in the described device and defined threshold temperature data to the signal classification decision of each described input image data and
According to described comparative result, generate the described operation of emphasizing the switch-over control signal of transformation parameter of switching controls.
23. computer program, it is the view data that can show multiple broadcast standard, and according at least 1 vertical during before view data and current view data during vertical, the view data that offers display panels is emphasized conversion, make described display panels in specified time limit, reach the transmitance of described view data regulation,, it is characterized in that the computer program that the liquid crystal TV set of the optical response that compensates described display panels is controlled with this
Described program is to make described computing machine carry out the program of following operation: promptly
According to detecting the vision signal that the input characteristics data are the 1st broadcast standards, still the signal classification testing result that the 2nd different with the vision signal vertical frequency of the 1st broadcast standard vision signals of playing standard obtains is carried out the operation of variable control to the conversion degree of emphasizing of described view data.
24. recording medium, storage can show the view data of multiple broadcast standard, and according at least 1 vertical during before view data and current view data during vertical, the view data that offers display panels is emphasized conversion, make described display panels in specified time limit, reach the transmitance of described view data regulation, with the program of this computing machine that liquid crystal TV set of the optical response that compensates described display panels is controlled; It is characterized in that,
Described program makes described computing machine carry out following operation: promptly
According to detecting the vision signal that input image data is the 1st broadcast standard, the signal classification testing result of the vision signal of the 2nd still different with the vision signal vertical frequency of the 1st broadcast standard broadcast standards is carried out the operation of variable control to the conversion degree of emphasizing of described view data.
CNB2004800117382A 2003-03-26 2004-03-23 Liquid crystal television receiver, liquid crystal display control method, program thereof, and recording medium Expired - Fee Related CN100466052C (en)

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CN107222704B (en) * 2017-06-21 2019-09-17 浙江大华技术股份有限公司 A kind of video formats switching method and device
CN111965860A (en) * 2020-08-12 2020-11-20 Tcl华星光电技术有限公司 System and method for measuring response time of liquid crystal display
CN111965860B (en) * 2020-08-12 2023-11-28 Tcl华星光电技术有限公司 System and method for measuring response time of liquid crystal display

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