CN101884048B - Video enhancement and display power management - Google Patents

Video enhancement and display power management Download PDF

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Publication number
CN101884048B
CN101884048B CN200780100434.7A CN200780100434A CN101884048B CN 101884048 B CN101884048 B CN 101884048B CN 200780100434 A CN200780100434 A CN 200780100434A CN 101884048 B CN101884048 B CN 101884048B
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pixel
given
value
pattern
background
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CN101884048A (en
Inventor
艾南斯·圣卡
大卫·若马求罗赛尔
帕芬·杜白
阿努拉格·毕斯特
苏利南·桑德
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Moxair Inc
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Moxair Inc
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0653—Controlling or limiting the speed of brightness adjustment of the illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/066—Adjustment of display parameters for control of contrast
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/16—Determination of a pixel data signal depending on the signal applied in the previous frame
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Abstract

In visual display devices such as LCD devices with backlight illumination, the backlight typically consumes most of device battery power. In the interest of displaying a given pixel pattern at a minimized backlight level, the pattern can be transformed while maintaining image quality, with a transform determined from pixel luminance statistics. Aside from, or in addition to such minimizing, a transform also can be used for image enhancement, for a displayed image better to meet a visual perception quality. In either case, the transform preferably is constrained for enforcing one or several display attributes.

Description

Video signal strengthens and display power management
Technical field
The present invention relates to electrical management and image enhancing in the visual display unit, more particularly, the electrical management and the image that relate in the liquid crystal indicator strengthen.
Background technology
Visual display unit is prevalent in the battery powered portable electronic equipment, for example mobile computer and mobile hand held phone, and it is essentially the maximum consumer of battery electric power.For example, thin film transistor (TFT) (the TFT that the back lighting of utilizing is arranged at device, " Thin-film transistor ") liquid crystal display (LCD, " Liquid-crystal display ") mobile device in, the LCD panel consumes the device electric power more than 30%, and 75% of the LCD electric power that basically consumes backlight.Therefore, in order to save battery electric power, main focusing on minimizes the power consumption of this display device.
One lcd screen consists essentially of the array of a liquid crystal pixel, and it is arranged to several column, and its each row have plural pixel, and arranges and to embark on journey, and its each pixel can show 256 shading values of a GTG and any of these corresponding chromatic values.Each pixel has liquid crystal cells, an exclusive thin film transistor (TFT), and the exclusive capacitor of itself.The direction of these liquid crystal in this unit of the electric field controls of this capacitor determines the optics penetrability of this unit, and determines its luminosity during by a backlighted.This capacitor is via its transistor charging and discharge.The device startup is essentially row one row to be carried out, so that all lines are connected to single row at any time.
In order to save the electric power in the LCD device, can use dynamic backlight control, it involves when using this device, for example when the playback film, dynamically turns down and heighten this backlight illumination.Moreover its benefit is to change accordingly one image to display/pattern by changing these pixel shading values.
Summary of the invention
When this display backlight is set in a particular luminance value, for be minimized in maximum backlight under the image distortion of original non-switched image and institute's perception between the image of this conversion under this specific condition backlight, can determine the better conversion (1) of these pixel numbers.Moreover, can satisfy a quality of image demand for minimum power consumption, can determine the better conversion (2) of these pixel numbers.One better conversion can maximize the luminosity of a given pattern, and specifies each pixel one numerical value that the suitableeest contrast is provided by the numerical value based on the probability density of these pixel shading values of this given pattern by a given pixel value dynamic range.Be preferably when changing, can consider that some display properties comes conversion parameter is applied restriction.
Description of drawings
Fig. 1 is shown as along an exemplary pixels numeric distribution figure of the line of 256 pixel numbers that form for a specific given pattern, and also shows the figure of this identical conversion and an exemplary multistage conversion.
Fig. 2 is shown as the pixel number distribution plan by one section Fig. 1 that difference function was similar to, and shows in addition how to calculate these conversion slopes.
Fig. 3 is shown as the multistage transition diagram that obtains of section difference function of Fig. 2.
Fig. 4 is the expression of an exemplary process of these given pixel numbers of pixel number distribution conversion of this given pattern of use in one preferred embodiment according to the present invention.
Fig. 5 is the expression that another exemplary process of these given pixel numbers is changed in the pixel number distribution of this given pattern of use in another preferred embodiment of representative the present invention.
Fig. 6 is the block schematic diagram of an exemplary specific embodiment of this technology.
Embodiment
The conversion shape
For a kind of switch technology, Fig. 1 is shown as given or input pixel shading value on the x axle, output pixel value on the y axle, and the graph-based of the distribution of these pixel numbers.Straight line by (0,0) to (255,255) represents the identical conversion of not saving electric power and can not cause distortion.For backlight control, conversion needs.Thereby, adjust this backlight after, this maximum perception shading value is u＜255 at the x=255 place.Then, suppose that the perception luminosity of this pixel is the product of the pixel value of this backlight value and this conversion, namely can be with u/255 as this electric power of saving backlight of factor adjustment.
Fig. 1 shows that also the general multistage conversion with 4 stages comes as an example.Generally speaking, for the stage/wisdom of section number and slope thereof selects, and can carry out the conversion of any needs.The present invention includes to help to determine the technology of number and its slope in these stages.
The restriction of conversion shape
One better conversion can be satisfied some and limit to prevent undesired effect.For example, if be 0 at the slope of any this conversion of stage, then all these pixel values will be compressed to a single numerical value in this scope, cause at this place and completely lose contrast.This is the example of some conversion of previously known among the present invention, and it prunes these high pixel values to a critical value, causes the erosion of bright pixels in this image.For example, because the forfeiture of contrast in the zone of this light, erosion will weaken the image of bulb and light.On the contrary, if slope is too large, approximating pixel value separates in this pixel value space to heavens, namely causes the reproduction of a distortion compared to this raw video.For example, when a given pixel value distribution had a spike, the pixel of elongated row had very similarly luminosity, for example in the scene in a ball park.If this conversion has a high slope for these pixel values, the court of this conversion will have the luminosity that extremely changes, and this image will present distortion.
Process these problems, a better technology is that this slope is applied two kinds of restrictions, the m value that namely should change in any stage:
m≤s max，
m≥s min，(1)
S wherein MaxAnd s MinU/255 is determined by the target adjustment factor backlight.Then
s max＝255/u
s min＝s×255/u
Wherein s is a parameter of suitably selecting.
Utilize these restrictions, a kind of better multistage conversion can see through dynamic backlight control, keep brightness, keep necessary place contrast, avoid the contrast distortion in important area, and can minimize the erosion effect compared to known conversion good power saving effect can be provided.
The estimation of multistage conversion
For the present explanation of the preferred technique that is used for estimating that a multistage that needs changes, we suppose that u is given, and namely we know the needed adjustment factor backlight, and the electric power of saving.This technology focuses on finds out a kind of conversion, its can be reaching under the saving electric power that is determined by u minimal distortion.One basic example program description is as follows:
(a) in this histogram numerical value is high zone, the numerical value that namely has several pixels to have this scope, we are by keeping original contrast with maximum slope value as much as possible.
(b) in this histogram numerical value is low zone, namely when a few pixels had numerical value in this scope, we used a lower slope.Contrast reduces in these zones, but because it only affects some pixels, this reduction can't be perceived to so much.
By this x axle is distinguished into B groove, wherein B is between 0 and 255 during beginning.The representative value of B can be between 5 and 30.Then in these grooves this original histogram of integration to obtain a fragment uniform density function as shown in Figure 2.The numerical value of U (i) representative this uniform density in groove i..
Fig. 2 is also shown in this uniform density in the whole dynamic range to compare.The numerical tabular of this density is shown as U.If U (i)＞U, then the number of pixel is namely advised by keeping original contrast with a suitable slope greater than mean value in groove i.If U (i)＜U then points out the pixel less than average number in groove i, so by using a lower slope some contrasts that can stand a loss.For example, as shown in Figure 2, can select an applicable slope to be used for conversion becomes another uniform density with numerical value U in the uniform density that groove i has numerical value U (i).This slope is given as follows:
s ( i ) = U ( i ) U - - - ( 2 )
Consider the restriction that formula 1 is given, we obtain the slope that following formula decides groove i:
If s (i)＞s Max, s (i)=s then Max
If s (i)＜s Min, s (i)=s then Min
Fig. 3 is shown as the pattern of this conversion after this step.At this moment, this conversion does not need to satisfy required maximum perception shading value u.Use this target adjustment factor backlight u/255, the luminosity of the required conversion of this maximum can be calculated to be
y f＝min(255，x f×255/u)
X wherein fMaximum input luminosity for this frame.
Basically, x fTherefore＞u, y basically f=255.Fig. 3 shows y in this example f=255 is the luminosity of maximum conversion, and it allows should be backlight with the factor adjustment of u/255, with the brightness of the maximum demonstration that causes u.Fig. 3 also shows that u is the numerical value of this maximum perception luminosity.Want now to revise the conversion of this computing, so that it has maximal value=y fIn Fig. 3, y fWe are higher than by given this maximal value t (255) of present conversion, so that can heighten this conversion by a suitable factor.If y fLess than t (255), then we namely turn down this conversion.In arbitrary example, we respect these given restrictions of formula 1.
Fig. 4 is shown as an exemplary algorithm, and it is denoted as MULTISTAGE (multistage), is used for determining this conversion t (p), 0≤p＜256.It can be used for work (1), described in above summary of the invention.
For work (2), we seek to satisfy the maximum perceived brightness of a regulation in addition after adjustment backlight.Fig. 5 is shown as an exemplary algorithm, and it is denoted as SCALING (ratio), can be used for work (2).In conjunction with program MULTISTAGE and SCALING the time, two work can be carried out simultaneously.I notice that some such two kinds of algorithms typical case indivedual and combination uses, as following:
1. use separately MULTISTAGE.Use maximal value t (255) to decide this adjustment factor t backlight (255)/255.This is to seek will to satisfy under any particular sections electric power saving target not attempting, and best as far as possible image is provided.
2. use MULTISTAGE.Based on required setting backlight, determine this adjustment factor u backlight.It is given by u/255 that this adjusts the factor, then uses SCALING.This can produce the suitableeest video signal or an image, and also can reach required saving electric power target.
3. utilize by 0 and use a conversion to the fixed slope of certain contiguous pixels value.After this critical value, use MULTISTAGE.This is to seek to keep high-high brightness, and still can reach contrast at these high pixel value places.
4. carry out above-mentioned application 3, then be applied in the SCALING that uses in 2.
5. carry out above-mentioned application 4, but when using SCALING, only adjusting this fixed slope conversion in the time of can't satisfying when this minimum slope restriction.
6. when being used for video signal, in time using a low-pass filter and come smoothing by each this conversion that determines for each frame of a scene in the above application 1-5 item.This can minimize because the flicker that very fast frame causes to the conversion variation of frame.
7. using a Hi-pass filter comes sharpening by the edge of each handled this video signal in 1 to 6 of the above-mentioned application.
8. by adjusting chroma pixel, use a color and be pressurized to the color scheme that this shading value is improved the image of processing.For example, in the preferred embodiment in this yuv space, each of these U and V composition can be heightened by a fixing factor out of the ordinary.In addition, the luminosity adjustment can involve the general utility functions conversion of this luminosity composition.
Interaction with environment
For we technology typical implementation generally speaking, Fig. 6 is shown as different types of input 1 and produces the video signal frame output 3 of having processed to processor 2, and backlight value 4, is used for showing video signal frames output 3 in client terminals display device 5.As illustrated in, for example input 1 can comprise following each/all: the numerical value of the pixel of an input video signal frame and statistics, in the video signal frame of a sequence one in the past the numerical value of video signal frame with the LCD panel characteristics of statistics, display device 5, therein produce this input the video signal frame environment arround light condition, reach the user and input.The input data are used by processor 2 and are decided conversion parameter, determine a backlight value and change pixel number.In display device 5, the pixel value of this conversion can be used the backlight upper demonstration that is determined by processor 2, or shows in the background of certain other supply.For demonstration, one video signal/image can be following each or its combination as target: (i) minimum power consumption on the display device 5, and (ii) be input as best as far as possible enhancing compared to this.
Technology of the present invention can be applicable to the static backlight of an other display and sets, or this backlightly dynamically changes into another frame by a frame of a video signal sequence in the scheme.In arbitrary example, when processing a frame, processor 2 can be with reference to the frame of at least one first pre-treatment.Also can use a previous frame to be used for smoothing, for example the suitable fraction α of these pixel values of a previous frame be joined the part (1-α) of the present frame of a scene.
Technological merit and use
Technology of the present invention can produce the screen picture of high-quality video signal, static image, figure and other multimedia application, application programs such as Microsoftt Power Point and Word, its all can be at minimized display backlight electric power or under any specific display backlight electric power.Moreover these technology can help strengthen and show, even only have a little or do not consider electric power backlight.But our technology implementation for example is used for notes type personal computer (PC, " Personal Computer "), for example Video CD (DVD, " Digital Video Disk ") electrical management and/or image in the middle of media player, hand held consumer electronic device, portable type media player, personal digital assistant (PDA) device, LCD TV (TV, " Television ") and the mobile phone etc. of playback reproducer strengthen.

Claims (30)

1. computer approach from the given pattern generating pixel of pixel display pattern, wherein the given pattern of pixel uses non-linear continuous conversion, given pixel value is converted to the pixel value of generation, and the method comprises:
(a) at least one display properties, determine that in the given pixel value each is restricted to the upper limit of the slope that is included in conversion at each place of these given pixel values and the restriction of lower limit, wherein each lower limit is greater than 0, and wherein at least one restriction of given pixel value is different from least another the restriction of given pixel value; And
(b) for having the background shading value and being subject to a) background of described restriction of above-mentioned steps, determine this conversion, if so that this pixel display pattern when being displayed on this background, can the minimal visual distortion compared to the given pattern of this pixel.
2. method as claimed in claim 1, wherein this at least one display properties is the erosion that minimizes in this pixel display pattern.
3. method as claimed in claim 1, wherein this at least one display properties is the image contrast who keeps in this pixel display pattern.
4. method as claimed in claim 1, wherein this conversion is determined by the statistics of the given numerical value of pixel luminosity of the given pattern of this pixel.
5. method as claimed in claim 4, wherein this statistics comprises histogram information.
6. method as claimed in claim 1, wherein this background shading value is prescribed.
7. method as claimed in claim 1, wherein essence homogeneous background shading value is determined by the information that the given numerical value of pixel luminosity of the given pattern of this pixel certainly obtains.
8. method as claimed in claim 7, wherein this information obtains from the histogram of the given numerical value of these pixel luminosity.
9. method as claimed in claim 1 also comprises the background shading value that determines reduction.
10. method as claimed in claim 9 determines that wherein this minimized background shading value comprises the statistics of the given numerical value of pixel luminosity that uses the given pattern of this pixel.
11. method as claimed in claim 9, wherein step 1 (b) is to carry out for a plurality of different background shading values.
12. method as claimed in claim 1, wherein this convert packets contains the fragment linear function.
13. such as the method for claim 12, wherein each in the linear fragment of this fragment linear function is crossed at least one groove of histogram of the pixel luminosity set-point of the given pattern of this pixel.
14. such as the method for claim 13, wherein at least one has by the slope to make decision in the linear fragment of this fragment linear function:
By the statistics of the part of these pixel luminosity set-points in this at least one histogram groove of crossing in these linear fragments, and
The statistics of integral body on all histogram grooves.
15. such as the method for claim 12, wherein this at least one restriction comprises the restriction for a slope of the linear fragment of this fragment linear function.
16. such as the method for claim 15, wherein at the low pixel shading value place of vicinity of the given pattern of this pixel, this slope is fixed.
17. such as the method for claim 15, wherein at the high pixel shading value of the vicinity place of the given pattern of this pixel, this slope is fixed.
18. method as claimed in claim 1 also comprises the spatiality high-pass filtering of this pixel display pattern.
19. method as claimed in claim 1, wherein the given pattern of this pixel is one of video signal sequence.
20. such as the method for claim 19, also comprise the timeliness low-pass filtering of the display pattern of order conversion.
21. method as claimed in claim 1, wherein the given pattern of this pixel has colourity, and the method also comprises the factor that determines to adjust this colourity.
22. method as claimed in claim 9, wherein the given pattern of this pixel is the given pattern of current pixel of video signal sequence, it comprises the given pattern of pixel of before having processed, determined thus previous background shading value, and wherein in step 1 (b) decision be different from this previous background shading value for the background shading value of the given pattern of this current pixel.
23. method as claimed in claim 1 also comprises the following input of acceptance: the pixel luminosity set-point of the given pattern of this pixel, and at least one item in following: (i) the video signal sequence is historical, light condition arround (ii) the LCD panel characteristics reaches (iii).
24. method as claimed in claim 1 also comprises this pixel display pattern of transmission and is presented on the display device.
25. such as the method for claim 24, also comprise and transmit essence homogeneous background shading value to this display device.
26. such as the method for claim 25, also be included in this pixel display pattern of demonstration on the background with this essence homogeneous background luminosity.
27. such as the method for claim 24, also be included in this pixel display pattern of demonstration on the background except the background with essence homogeneous background luminosity.
28. such as the method for claim 24, wherein this display device is included in following one: notes type personal computer, dvd playback device, hand held consumer electronic device, portable type media player, PDA device, LCD TV and mobile phone.
29. the device from the given pattern generating pixel of pixel display pattern, wherein the given pattern of pixel uses non-linear continuous conversion, given pixel value is converted to the pixel value of generation, and this device comprises:
(a) first device section, for at least one display properties, be used for by first device section, determine that in the given pixel value each is restricted to the upper limit of the slope that is included in conversion at each place of these given pixel values and the restriction of lower limit, wherein each lower limit is greater than 0, and wherein at least one restriction of given pixel value is different from least another the restriction of given pixel value; And
(b) the second device section, it is for the background that has the background shading value and be subject to the described restriction of first device section, determine this conversion by this second device section, if so that this pixel display pattern when being displayed on this background, can the minimal visual distortion compared to the given pattern of this pixel.
30. the treating apparatus from the given pattern generating pixel of pixel display pattern, wherein the given pattern of pixel uses non-linear continuous conversion, given pixel value is converted to the pixel value of generation, and this treating apparatus comprises:
(a) first processor module, for at least one display properties, be used for by the first processing module, determine that in the given pixel value each is restricted to the upper limit of the slope that is included in conversion at each place of these given pixel values and the restriction of lower limit, wherein each lower limit is greater than 0, and wherein at least one restriction of these given pixel values is different from least another the restriction of given pixel value; And
(b) the second processor module, it is for the background that has the background shading value and be subject to the described restriction of first processor module, determine this conversion by this second processor module, so that if this pixel display pattern is when being displayed on this background, can the minimal visual distortion compared to the given pattern of this pixel.
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