CN105259687A - Liquid crystal display screen picture consistency adjusting method and system - Google Patents
Liquid crystal display screen picture consistency adjusting method and system Download PDFInfo
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- CN105259687A CN105259687A CN201510679840.XA CN201510679840A CN105259687A CN 105259687 A CN105259687 A CN 105259687A CN 201510679840 A CN201510679840 A CN 201510679840A CN 105259687 A CN105259687 A CN 105259687A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
Abstract
The invention discloses a liquid crystal display screen picture consistency adjusting method and system. The liquid crystal display screen is divided into a plurality of areas and then a Gamma curve corresponding to each area is calculated; a pixel signal of each area is corrected by the corresponding Gamma curve of each area and RGB data of each area after the correction can be achieved; Gamma voltage is correspondingly adjusted according to the RGB data of each area, so each area of the liquid crystal display screen can be input on the same picture and output the same gray scale signal; and picture color consistency can be improved. A present TV framework structure is employed, so hardware cost cannot be increased and great convenience is brought to users.
Description
Technical field
The present invention relates to technical field of liquid crystal display, in particular a kind of picture uniformity control method of LCDs and system.
Background technology
It is colored filter due to LCDs that LCDs has abundant colour.R, G, B three primary colours (or RGBW tetra-look) of colored filter according to the arrangement of certain pattern, and with the TFT subpixel one_to_one corresponding of TFT substrate.The white light that backlight sends, becomes corresponding R, G, B coloured light after optical filtering diaphragm.Regulated the magnitude of voltage being added in each subpixel by tft array, thus change the intensity in transmission of each coloured light.The RGB Colored light mixing of varying strength together, just achieves colored display.Under the identical production technology of design and same parameter situation, desirable LCDs should when providing the picture of same color, the color in each region of screen should be the same, namely human eye sense organ should be same color.But in practical application, the color in each region of the picture of same color, screen also exists difference, Here it is LCDs solid colour sex chromosome mosaicism.Can display screen color keep consistency because many factors causes, and for same screen, needs identical LED parameter, accurately liquid crystal molecule driving voltage, the consistance etc. of color filer.Due to liquid crystal display characteristic, the error of various parameter and the thickness of colored filter, on the same stage televisor always also exists the deviation of color between liquid crystal display regional, for Color-sensitive consumer and pursue for the perfect television provider of design, this is beyond doubt kind sorry.As will consistency of colour be reached, then need the colour temperature consistance of shielding body good.
In current scheme, the application that GAMMA corrects is exactly a kind of measure solving problems.GAMMA corrects, i.e. the brightness of rectification display device display, the relation between colour and the signal of input, to reach human eye to brightness, colored responsive homogeneity.But this kind of scheme is a kind of color correction measure used for the overall colour cast of screen.When the zones of different colour cast of same screen, then can make the subregion of screen more serious depart from original color, reduce product specification.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of picture uniformity control method and system of LCDs are provided, be intended to solution existing due to screen body production technology, the problem that backlight driving voltage parameter error causes same TV screen body each region colour cast, color inconsistent.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A picture uniformity control method for LCDs, wherein, comprising:
A, LCDs is divided into multiple region, calculates the GAMMA curve that regional is corresponding;
B, the GAMMA curve corresponding to the picture element signal utilization regional of regional correct, and obtain regional and correct rear corresponding RGB data;
C, the RGB data corresponding according to regional adjust corresponding GAMMA voltage, to make the regional of LCDs when same picture inputs, export same grayscale signal.
The picture uniformity control method of described LCDs, wherein, described steps A specifically comprises:
A1, the viewing area of LCDs is divided into multiple region;
A2, by the colored measuring instrument test regional GAMMA data corresponding when giving the picture of 0-255 rank each GTG same color, and calculate GAMMA curve corresponding to regional according to GAMMA data.
The picture uniformity control method of described LCDs, wherein, in described GAMMA curve, when certain pixel is in high-high brightness, regulates corresponding GAMMA maximal value to make it be less than or equal to 255 GTGs.
The picture uniformity control method of described LCDs, wherein, described step C specifically comprises:
C1, for RGB data corresponding to the display frame of regional, apply corresponding GAMMA control voltage, make zones of different show same color under the input condition of the picture of same color.
A picture uniformity regulating system for LCDs, wherein, comprising:
Correction parameter acquisition module, for LCDs is divided into multiple region, calculates the GAMMA curve that regional is corresponding;
Correction module, for using GAMMA curve corresponding to regional to correct to the picture element signal of regional, obtaining regional and correcting rear corresponding RGB data;
Picture adjustment module, adjusts corresponding GAMMA voltage for the RGB data corresponding according to regional, to make the regional of LCDs when same picture inputs, exports same grayscale signal.
The picture uniformity regulating system of described LCDs, wherein, described correction parameter acquisition module comprises:
Area division unit, for being divided into multiple region by the viewing area of LCDs;
Parameter calculation unit, for by colored measuring instrument test regional GAMMA data corresponding when giving the picture of 0-255 rank each GTG same color, and calculates GAMMA curve corresponding to regional according to GAMMA data.
The picture uniformity regulating system of described LCDs, wherein, described correction parameter acquisition module comprises:
Numerical value regulon, in described GAMMA curve, when certain pixel is in high-high brightness, regulates corresponding GAMMA maximal value to make it be less than or equal to 255 GTGs.
The picture uniformity regulating system of described LCDs, wherein, described picture adjustment module comprises:
Picture uniformity regulon, for the RGB data that the display frame for regional is corresponding, applies corresponding GAMMA control voltage, makes zones of different show same color under the input condition of the picture of same color.
The picture uniformity control method of a kind of LCDs provided by the present invention and system, efficiently solve existing due to screen body production technology, the problem that backlight driving voltage parameter error causes same TV screen body each region colour cast, color inconsistent, by LCDs is divided into multiple region, calculate the GAMMA curve that regional is corresponding; Use GAMMA curve corresponding to regional to correct to the picture element signal of regional, obtain regional and correct rear corresponding RGB data; The RGB data corresponding according to regional adjusts corresponding GAMMA voltage, to make the regional of LCDs when same picture inputs, exports same grayscale signal; Improve the consistance of picture colour; And adopt current television frame structure, can not hardware cost be increased, bring to user and facilitate greatly.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the picture uniformity control method preferred embodiment of LCDs provided by the invention.
Fig. 2 is the structured flowchart of the picture uniformity regulating system preferred embodiment of LCDs provided by the invention.
Embodiment
The invention provides a kind of picture uniformity control method and system of LCDs, for making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 1, Fig. 1 is the process flow diagram of the picture uniformity control method preferred embodiment of LCDs provided by the invention, as shown in the figure, said method comprising the steps of:
Step S100, LCDs is divided into multiple region, calculates the GAMMA curve that regional is corresponding;
Step S200, the GAMMA curve corresponding to the picture element signal utilization regional of regional correct, and obtain regional and correct rear corresponding RGB data;
Step S300, the RGB data corresponding according to regional adjust corresponding GAMMA voltage, to make the regional of LCDs when same picture inputs, export same grayscale signal.
Below in conjunction with specific embodiment, above-mentioned steps is described in detail.
In the step s 100, LCDs is divided into multiple region, calculates the GAMMA curve that regional is corresponding.Specifically, first the viewing area of LCDs is divided into multiple region.Then, by the GAMMA data that colored measuring instrument test regional is corresponding when giving the picture of 0-255 rank each GTG same color, and GAMMA curve corresponding to regional is calculated according to GAMMA data.
When practical application, GAMMA, except correcting the brightness curve of screen body, can also correct screen body colour temperature, the feature of comprehensive GAMMA, and the present invention controls to correct mainly through carrying out independent GAMMA to region each on televisor.The backlight LED light emitting diode of liquid crystal display is due to its temperature characterisitic, aging along with television boot-strap, the change of environment temperature, certain skew can be there is in the LED luminance of often kind of primary colours compared with brightness during normal temperature, and its side-play amount is not identical, result in the distortion of the white field of image.In order to correct it, propose the GAMMA compensated curve under a kind of varying environment problem for often kind of primary-color LED, make RGB three-primary color LED have identical intensity deviation amount when variation of ambient temperature, to ensure white field balance.Namely under the picture of white field, the colour temperature in each region of televisor is consistent.
Moreover, GAMMA curve can in advance according to regional when giving the picture of each GTG same color in 0-255 rank, tested by colored measuring instrument, and calculate.Then according to design proposal in advance, as TV screen is divided into N number of region (N is positive integer), then N group GAMMA has been needed.When current existing television frame, corresponding GAMMA curve is used respectively to the picture in each region of televisor.For often organizing picture corresponding to region, apply with the GAMMA curve of correspondence and control voltage, thus make region follow the picture of same color between region to show same color, compensate for the defect of the ubiquitous colour consistency deficiency of current TV.
Preferably, in described GAMMA curve, when certain pixel is in high-high brightness, regulate corresponding GAMMA maximal value to make it be less than or equal to 255 GTGs, namely make corresponding GAMMA maximal value below 255 GTGs.Specifically, due to various product, all have desired value to the colour temperature of various GTG, when the colour temperature of high-high brightness differs larger with desired value, need the maximal value reducing GAMMA, namely control when high-high brightness, GAMMA maximal value is below 255 GTGs.When practical application, when the colour temperature of high-high brightness and the difference of desired value are greater than difference threshold, then represent that difference is comparatively large, need to reduce the maximum of GAMMA.This difference threshold can be 200K, 300K, 400K or 500K etc., and the unit of colour temperature is K(Kelvin), this is prior art.The value of difference threshold can set as required.
In step s 200, use GAMMA curve corresponding to regional to correct to the picture element signal of regional, obtain regional and correct rear corresponding RGB data.Specifically, use the GAMMA curve in respective region to correct to every subregional picture element signal, obtain the RGB data after correcting and export.
In step S300, the RGB data corresponding according to regional adjusts corresponding GAMMA voltage, to make the regional of LCDs when same picture inputs, exports same grayscale signal.Specifically, screen body T-CON is according to the RGB data of regional and adjust corresponding GAMMA voltage, when finally making same picture input, exports same grayscale signal, ensure that the consistance of each field color.When practical application, the RGB data that the display frame for regional is corresponding, applies corresponding GAMMA control voltage, makes zones of different show same color under the input condition of the picture of same color.
With concrete Application Example, that the present invention is described in detail is as follows below.
For televisor, original image signal is after input terminal (such as HDMI) input of televisor, televisor CPU image processing module carries out image information conversion to it, the technical finesses such as image enhancement, finally carry out RGB colour gamut and strengthen process, after televisor GAMMA curve corrects it, input to the T-CON of screen body.
For the region, left and right two of plane because screen bulk properties has different colour temperatures.Picture signal is for grayscale signal.Suppose that raw frames is the grayscale signal (i.e. pure white picture) that RGB is 255, but because screen body factor performance colour cast, show as the grayscale signal that left area actual displayed is 240, right area actual displayed is the grayscale signal of 240, due to the inclined same color of entirety, according to one group of GAMMA, it is corrected.
And shield body left and right sides color partially different respectively because the factor such as parameter or fabrication error causes, after the white field information input of same GTG 255, corresponding left side actual displayed color is close to showing as the grayscale signal that left area actual displayed is 240, and right area actual displayed is the grayscale signal of 230.If corrected it according to above-mentioned single GAMMA, as taken left side as benchmark, after calibration, the picture on right side still do not reach real close to 255 grey decision-making.Screen body local colour cast problem is caused still to exist.
About step S100, when practical operation, other testing tools such as first colored measuring instrument CA210(or CA310) connected with computer by USB interface, computer is followed by USB port and is connected with the serial ports of televisor at centre serial connection MSTARdebugtool, and the colour signal of colored measuring instrument CA210 receive optical probe Detector to the central point of screen body is measured.In this example, for required colour temperature for 9K-12K.
Automatically gamma curve is tested, the Gammameasure page, test condition with MstarTool:
Under HDMI passage, turn off DLC/WLE/BLE, luminance contrast value be arranged to intermediate value, RGBGain/Offset value is arranged to intermediate value.Arrange: GLStep is gray scale step-length, and default setting is 8; Interval is interval time, acquiescence 300ms; CA210Channel is the passage used of CA210, and which passage which concrete passage just selects; CA210Speed gives tacit consent to Auto; GammaValue selects 2.2, clicks Measure and starts test.After having tested the original Gamma data of display screen, insert the x that target colour temperature is corresponding, y value (such as colour temperature 9780, x=0.282, y=0.290, uv<0.0005), calculate the gamma curve of target colour temperature, after preservation, write software, test the x of different grey-scale with CA210, y value, if the x corresponding with target colour temperature, y value is close, so this group gamma curve is just more accurate; If the x corresponding with target colour temperature, y value has deviation, so also need to carry out manual Gamma adjustment to gray level devious.
Utilize the rgb value data of gray level region pixel devious in the Datareport function reading images of MstarTool, choose ReportDatatoGamma, click G icon thereafter, jump to the Gamma page, the left side is gamma curve, and the data on the right are the rgb values of every single order, and namely point corresponding in the gamma curve of the left side is the gray level devious of Datareport feedback, the value of continuous fine setting RB, write software, tests the x of this gray scale, y, towards the x that target colour temperature is corresponding, y is close.Repeat to debug gray level devious, until the x of all gray levels, y value all meets the requirements, preserve, Gamma has debugged.
The way slightly difference of different main control chip, for Mstar main control chip, the all signals input of Mstar main control chip subregion shares a gamma curve (should in use-case, namely signal input totally one the gamma curve inside left area, signal input totally one the 2nd gamma curve inside right half area), the white balance effect of lower GTG is seen at each passage, if the RGBgain/offset also having deviation can adjust inside factory menu revises after write software.Screen body original GAMMA value measuring process in the manner described above.
Be separatrix with center line by LCDs, correspondence is divided into left area and right half area, the central point choosing left area and right half area is respectively measurement point, obtains the original GAMMA curve of left area and right half area according to the GAMMA acquisition pattern after above rectification respectively.
Further, the left and right sides for screen adopts GAMMA to correct respectively.Principle aspect, GAMMA parameter is stored in TV screen ginseng file in, corresponding file first place is had in screen ginseng file, be respectively GammaTable-1 and GammaTable-2, corresponding each GammaTable-1 or GammaTable-2 stores the GAMMA curve values in corresponding left region and right region respectively.Often comprise parameter_r below group, parameter_g, parameter_b, the GAMMA correction data information that namely R, G, B are corresponding.
For reaching higher Adjustment precision, further, the side-play amount of RGBGain/Offset and R, G, B need arrange two groups, respectively the trace adjustment of corresponding GammaTable-1 and GammaTable-2.RGBGain/Offset is adopted to the mode of addressing of address, i.e. special headspace simultaneously, to meet the algorithm requirement of RGBGain/Offset, i.e. RGBGain/Offset1, RGBGain/Offset2 ... .RGBGain/OffsetN.In this example, owing to only having two groups of GAMMMAGammaTable-1 and GammaTable-2, namely Operation system setting RGBGain/Offset1 and RGBGain/Offset2 comes into force.And write RGBGain/Offset1 and RGBGain/Offset2 option inside ADC in factory menu, RGB option value corresponding respective below each option:
R-GAIN128(is according to 2
8=256 is example, and 128 is intermediate value, for regulating more refinement, and can by 2
10=256, now intermediate value is 512)
G-GAIN128(is according to 2
8=256 is example, and 128 is intermediate value, for regulating more refinement, and can by 2
10=256, now intermediate value is 512)
B-GAIN128(is according to 2
8=256 is example, and 128 is intermediate value, for regulating more refinement, and can by 2
10=256, now intermediate value is 512)
R-OFFSET128(is according to 2
8=256 is example, and 128 is intermediate value, for regulating more refinement, and can by 2
10=256, now intermediate value is 512)
G-OFFSET128(is according to 2
8=256 is example, and 128 is intermediate value, for regulating more refinement, and can by 2
10=256, now intermediate value is 512)
B-OFFSET128(is according to 2
8=256 is example, and 128 is intermediate value, for regulating more refinement, and can by 2
10=256, now intermediate value is 512)
Meanwhile, call its adjustment function to correct the adjustment of the GAMMA in each region to complete.
For the original signal of each pixel, each pixel stores the luminance signal, colour gamut rgb value etc. of original signal, each region includes some pixels, the coordinate in corresponding each region can use Block(i, j) represent, from left to right be expressed as line number Line(i) (namely detachable region line number, this can by menu input amendment), last region representation is Block(m, n).Accordingly m*n region is also divided into picture signal.In every block the number of pixel then available resolution be multiplied after divided by m*n, wherein m and n is not more than the positive integer of screen lines field pixel number respectively, and for the screen of 3840*2160 resolution, then m is not more than 3840, n and is not more than 2160.On corresponding software flow, first initialization is carried out to GAMMA table.Obtaining GAMMA quantity N(GAMMA is GammaTable-1, GammaTable-2...GammaTable-N), obtain the line number Line(i of screen divider simultaneously), detect Line(i) whether be effective value, if be not effective value, then continue to obtain line number; As being effective value, then by picture pixel according to Line(i) OK, be divided into N equal portions, use the GAMMA curve in respective region to correct to every subregional picture element signal, obtain correct after RGB data export.
As with N=2, Line(i)=1, namely the whole viewing area symmetry of LCDs is divided into two regions, left and right, first initialization is carried out to GAMMA table.Obtain GAMMA quantity N=2, obtain the line number Line(i of screen divider simultaneously)=1, detect Line(i) whether be effective value, detect as effective value, then by picture pixel according to a line, be divided into two equal portions, use the GAMMA curve in respective region to correct to every subregional picture element signal, obtain the RGB data after correcting and export.Screen body T-CON is according to the RGB data of regional and adjust corresponding GAMMA voltage, when finally making same picture input, exports same grayscale signal, ensure that the consistance of each field color.
When practical application, also need to adjust brightness.Gamma is as the rearmost end of whole signal transacting, and the adjustment of Gamma can affect the entirety embodiment of last brightness, so need first Gamma to be decided the adjustment doing brightness aspect again; In YUV color space, the requirement of brightness adjustment demand fulfillment ITU-RBT.601/BT.709, namely Y level range is 16-235, the contrast requirement of such guarantee signal.Simultaneously due to subarea processing, therefore need to ensure that the brightness between the regional of LCDs division is even with transition during GTG.
The picture uniformity control method of LCDs provided by the invention, according to the quantity of screen ginseng file, carries out Region dividing to the viewing area of LCDs, is divided into multiple region, carry out separately GAMMA carry out correction process to each region.For current scheme, when not promoting hardware cost, the test of GAMMA subregion and subregion being corrected, solving the problem of the TV local colour cast caused because of screen body consistency problem in the market, bringing and facilitate greatly.
Based on the picture uniformity control method of above-mentioned LCDs, the embodiment of the present invention additionally provides a kind of picture uniformity regulating system of LCDs, as shown in Figure 2, comprising:
Correction parameter acquisition module 10, for LCDs is divided into multiple region, calculates the GAMMA curve that regional is corresponding; Specifically as described in step S100;
Correction module 20, for using GAMMA curve corresponding to regional to correct to the picture element signal of regional, obtaining regional and correcting rear corresponding RGB data; Specifically as described in step S200;
Picture adjustment module 30, adjusts corresponding GAMMA voltage for the RGB data corresponding according to regional, to make the regional of LCDs when same picture inputs, exports same grayscale signal; Specifically as described in step S300.
Further, described correction parameter acquisition module 10 comprises:
Area division unit, for being divided into multiple region by the viewing area of LCDs;
Parameter calculation unit, for by colored measuring instrument test regional GAMMA data corresponding when giving the picture of 0-255 rank each GTG same color, and calculates GAMMA curve corresponding to regional according to GAMMA data.
Further, described correction parameter acquisition module 10 comprises:
Numerical value regulon, in described GAMMA curve, when certain pixel is in high-high brightness, regulates corresponding GAMMA maximal value to make it be less than or equal to 255 GTGs.
Further, described picture adjustment module 30 comprises:
Picture uniformity regulon, for the RGB data that the display frame for regional is corresponding, applies corresponding GAMMA control voltage, makes zones of different show same color under the input condition of the picture of same color.
In sum, the picture uniformity control method of a kind of LCDs provided by the invention and system, by LCDs is divided into multiple region, calculate the GAMMA curve that regional is corresponding; Use GAMMA curve corresponding to regional to correct to the picture element signal of regional, obtain regional and correct rear corresponding RGB data; The RGB data corresponding according to regional adjusts corresponding GAMMA voltage, to make the regional of LCDs when same picture inputs, exports same grayscale signal; Improve the consistance of picture colour; And adopt current television frame structure, can not hardware cost be increased, bring to user and facilitate greatly.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (8)
1. a picture uniformity control method for LCDs, is characterized in that, comprising:
A, LCDs is divided into multiple region, calculates the GAMMA curve that regional is corresponding;
B, the GAMMA curve corresponding to the picture element signal utilization regional of regional correct, and obtain regional and correct rear corresponding RGB data;
C, the RGB data corresponding according to regional adjust corresponding GAMMA voltage, to make the regional of LCDs when same picture inputs, export same grayscale signal.
2. the picture uniformity control method of LCDs according to claim 1, is characterized in that, described steps A specifically comprises:
A1, the viewing area of LCDs is divided into multiple region;
A2, by the colored measuring instrument test regional GAMMA data corresponding when giving the picture of 0-255 rank each GTG same color, and calculate GAMMA curve corresponding to regional according to GAMMA data.
3. the picture uniformity control method of LCDs according to claim 1, is characterized in that, in described GAMMA curve, when certain pixel is in high-high brightness, regulates corresponding GAMMA maximal value to make it be less than or equal to 255 GTGs.
4. the picture uniformity control method of LCDs according to claim 1, is characterized in that, described step C specifically comprises:
C1, for RGB data corresponding to the display frame of regional, apply corresponding GAMMA control voltage, make zones of different show same color under the input condition of the picture of same color.
5. a picture uniformity regulating system for LCDs, is characterized in that, comprising:
Correction parameter acquisition module, for LCDs is divided into multiple region, calculates the GAMMA curve that regional is corresponding;
Correction module, for using GAMMA curve corresponding to regional to correct to the picture element signal of regional, obtaining regional and correcting rear corresponding RGB data;
Picture adjustment module, adjusts corresponding GAMMA voltage for the RGB data corresponding according to regional, to make the regional of LCDs when same picture inputs, exports same grayscale signal.
6. the picture uniformity regulating system of LCDs according to claim 5, is characterized in that, described correction parameter acquisition module comprises:
Area division unit, for being divided into multiple region by the viewing area of LCDs;
Parameter calculation unit, for by colored measuring instrument test regional GAMMA data corresponding when giving the picture of 0-255 rank each GTG same color, and calculates GAMMA curve corresponding to regional according to GAMMA data.
7. the picture uniformity regulating system of LCDs according to claim 5, is characterized in that, described correction parameter acquisition module comprises:
Numerical value regulon, in described GAMMA curve, when certain pixel is in high-high brightness, regulates corresponding GAMMA maximal value to make it be less than or equal to 255 GTGs.
8. the picture uniformity regulating system of LCDs according to claim 5, is characterized in that, described picture adjustment module comprises:
Picture uniformity regulon, for the RGB data that the display frame for regional is corresponding, applies corresponding GAMMA control voltage, makes zones of different show same color under the input condition of the picture of same color.
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