CN105259687B - A kind of the picture uniformity adjusting method and system of liquid crystal display - Google Patents
A kind of the picture uniformity adjusting method and system of liquid crystal display Download PDFInfo
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- G—PHYSICS
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- 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
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- 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
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Abstract
The invention discloses the picture uniformity adjusting methods and system of a kind of liquid crystal display to calculate the corresponding GAMMA curves in each region by the way that liquid crystal display is divided into multiple regions；The picture element signal of each region is corrected with the corresponding GAMMA curves in each region, obtains corresponding RGB data after the correction of each region；Corresponding GAMMA voltages are adjusted according to the corresponding RGB data in each region, so that each region of liquid crystal display exports same grayscale signal in the case where same picture inputs；Improve the consistency of picture colour；And current television frame structure is used, hardware cost will not be increased, bring to user and greatly facilitate.
Description
Technical field
The present invention relates to a kind of adjustings of the picture uniformity of technical field of liquid crystal display more particularly to liquid crystal display
Method and system.
Background technology
It is the colored filter due to liquid crystal display that liquid crystal display, which has abundant colour,.R, G of colored filter,
B three primary colours（Or tetra- colors of RGBW）It arranges according to certain pattern, and is corresponded with the TFT subpixel of TFT substrate.Backlight
The white light sent out becomes corresponding R, G, B coloured light after optical filtering diaphragm.The electricity for being added in each subpixel is adjusted by tft array
Pressure value, to change the intensity in transmission of white light.The RGB color light of varying strength mixes, and is achieved that colored display.
In the case of designing identical production technology and same parameter, ideal liquid crystal display should be in the picture for providing same color
When, each region of screen color should be the same, i.e. human eye sense organ should be same color.But in practical application, same color
There is differences for the color in each region of picture, screen, and here it is liquid crystal display solid colour sex chromosome mosaicisms.Show that can screen color
Being consistent property is for same screen, to need identical LED parameters, accurately liquid crystal caused by many factors
Molecular drive voltage, the consistency etc. of color filer.Due to liquid crystal screen characteristics, the error and colored filter of various parameters
Thickness, there is always the deviations of color between liquid crystal display each region on television set on the same stage, for the consumer of Color-sensitive
And for pursuing the perfect television provider of design, it is sorry that this is undoubtedly kind.Such as to reach consistency of colour, then need screen body
Colour temperature consistency it is good.
In current scheme, the application of GAMMA corrections is exactly to solve a kind of measure of problems.GAMMA is corrected, i.e.,
Relationship between the signal of brightness, colour and input that correction display device is shown, to reach human eye to brightness, color sensitive
Uniformity.But such scheme is for a kind of color correction measure shielded whole colour cast and used.When the different zones of same screen
When colour cast, then it can make the subregion of screen is more serious to deviate original color, reduce product specification.
Therefore, the existing technology needs to be improved and developed.
Invention content
The technical problem to be solved in the present invention is, provides a kind of picture uniformity adjusting method of liquid crystal display and is
System, it is intended to solve existing due to shielding body production technology, backlight driving voltage parameter error leads to same each region of TV screen body
The inconsistent problem of colour cast, color.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of picture uniformity adjusting method of liquid crystal display, wherein including：
A, liquid crystal display is divided into multiple regions, calculates the corresponding GAMMA curves in each region；
B, the picture element signal of each region is corrected with the corresponding GAMMA curves in each region, obtains each area
Corresponding RGB data after the correction of domain；
C, corresponding GAMMA voltages are adjusted according to the corresponding RGB data in each region, so that each area of liquid crystal display
Domain exports same grayscale signal in the case where same picture inputs.
The picture uniformity adjusting method of the liquid crystal display, wherein the step A is specifically included：
A1, the display area of liquid crystal display is divided into multiple regions；
A2, that each region is tested by colored measuring instrument is corresponding when to the picture of each grayscale same color of 0-255 ranks
GAMMA data, and the corresponding GAMMA curves in each region are calculated according to GAMMA data.
The picture uniformity adjusting method of the liquid crystal display, wherein in the GAMMA curves, when some picture
For vegetarian refreshments in maximum brightness, adjusting corresponding GAMMA maximum values makes it be less than or equal to 255 grayscale.
The picture uniformity adjusting method of the liquid crystal display, wherein the step C is specifically included：
C1, the corresponding RGB data of display picture for each region apply corresponding GAMMA controls voltage, make difference
Region shows same color under the input condition of the picture of same color.
A kind of picture uniformity regulating system of liquid crystal display, wherein including：
It is corresponding to calculate each region for liquid crystal display to be divided into multiple regions for correction parameter acquisition module
GAMMA curves；
Correction module is corrected for the picture element signal to each region with the corresponding GAMMA curves in each region,
Obtain corresponding RGB data after each region corrects；
Picture adjustment module, for adjusting corresponding GAMMA voltages according to the corresponding RGB data in each region, so that liquid
Each region of crystal display screen exports same grayscale signal in the case where same picture inputs.
The picture uniformity regulating system of the liquid crystal display, wherein the correction parameter acquisition module includes：
Area division unit, for the display area of liquid crystal display to be divided into multiple regions；
Parameter calculation unit is giving 0-255 ranks each grayscale same color for testing each region by colored measuring instrument
Picture when corresponding GAMMA data, and the corresponding GAMMA curves in each region are calculated according to GAMMA data.
The picture uniformity regulating system of the liquid crystal display, wherein the correction parameter acquisition module includes：
Numerical value adjusts unit, in the GAMMA curves, when some pixel is in maximum brightness, adjusting and corresponding to
GAMMA maximum values make its be less than or equal to 255 grayscale.
The picture uniformity regulating system of the liquid crystal display, wherein the picture adjustment module includes：
Picture uniformity adjusts unit, for the corresponding RGB data of display picture for each region, applies corresponding
GAMMA controls voltage, and different zones is made to show same color under the input condition of the picture of same color.
The picture uniformity adjusting method and system of a kind of liquid crystal display provided by the present invention efficiently solve existing
Have due to shielding body production technology, backlight driving voltage parameter error causes each region colour cast of same TV screen body, color inconsistent
The problem of, by the way that liquid crystal display is divided into multiple regions, calculate the corresponding GAMMA curves in each region；To each region
Picture element signal be corrected with the corresponding GAMMA curves in each region, obtain each region correction after corresponding RGB numbers
According to；Corresponding GAMMA voltages are adjusted according to the corresponding RGB data in each region, so that each region of liquid crystal display is same
In the case of a kind of input of picture, same grayscale signal is exported；Improve the consistency of picture colour；And use current TV
Frame structure will not increase hardware cost, bring to user and greatly facilitate.
Description of the drawings
Fig. 1 is the flow chart of the picture uniformity adjusting method preferred embodiment of liquid crystal display provided by the invention.
Fig. 2 is the structure diagram of the picture uniformity regulating system preferred embodiment of liquid crystal display provided by the invention.
Specific implementation mode
The present invention provides a kind of the picture uniformity adjusting method and system of liquid crystal display, for make the purpose of the present invention,
Technical solution and advantage are clearer, clear, and the present invention is described in more detail for the embodiment that develops simultaneously referring to the drawings.It should
Understand, the specific embodiments described herein are merely illustrative of the present invention, is not intended to limit the present invention.
Referring to Fig. 1, Fig. 1 is the picture uniformity adjusting method preferred embodiment of liquid crystal display provided by the invention
Flow chart, as shown, the described method comprises the following steps：
Step S100, liquid crystal display is divided into multiple regions, calculates the corresponding GAMMA curves in each region；
Step S200, the picture element signal of each region is corrected with the corresponding GAMMA curves in each region, is obtained
Corresponding RGB data after the correction of each region；
Step S300, corresponding GAMMA voltages are adjusted according to the corresponding RGB data in each region, so that liquid crystal display
Each region in the case where same picture inputs, export same grayscale signal.
Above-mentioned steps are described in detail with reference to specific embodiment.
In the step s 100, liquid crystal display is divided into multiple regions, calculates the corresponding GAMMA curves in each region.
Specifically, the display area of liquid crystal display is first divided into multiple regions.Then, each area is tested by colored measuring instrument
Domain corresponding GAMMA data when to the picture of each grayscale same color of 0-255 ranks, and be calculated respectively according to GAMMA data
The corresponding GAMMA curves in a region.
In practical application, brightness curves of the GAMMA in addition to that can correct screen body, can also correct screen body colour temperature, it is comprehensive
The feature of GAMMA, the present invention to each region on television set mainly by carrying out individual GAMMA controls correction.The back of the body of liquid crystal display
Light LED light emitting diodes are due to its temperature characterisitic, with the aging of television boot-strap, the variation of environment temperature, each primary colours
Certain offset can occur compared with brightness of LED luminance when room temperature, and its offset differs, result in the mistake of the white field of image
Very.In order to be corrected to it, the GAMMA compensated curves under a kind of varying environment problem are proposed for each primary-color LED, are made
RGB three-primary color LEDs intensity deviation amount having the same in variation of ambient temperature, to ensure white field balance.Under i.e. white field picture
The colour temperature in each region of television set is consistent.
Furthermore GAMMA curves can lead to previously according to each region when to the picture of each grayscale same color of 0-255 ranks
Colored measuring instrument test is crossed, and is calculated.Then N number of region is divided into according to advance design scheme, such as video screen（N is
Positive integer）, then N groups GAMMA has been needed.In the case of current existing television frame, the picture in each region of television set is made respectively
With corresponding GAMMA curves.Picture corresponding for every group of region applies with corresponding GAMMA curves and control voltage, thus
So that region shows same color with the picture of same color between region, the color one of current TV generally existing is compensated for
The insufficient defect of cause property.
Preferably, in the GAMMA curves, when some pixel is in maximum brightness, it is maximum to adjust corresponding GAMMA
Value makes it be less than or equal to 255 grayscale, that is, makes corresponding GAMMA maximum values below 255 grayscale.Specifically, due to
Various products have desired value to the colour temperature of various grayscale, when the colour temperature of maximum brightness differs larger with desired value, need to drop
The maximum value of low GAMMA is controlled in maximum brightness, GAMMA maximum values are below 255 grayscale.In practical application, ought be most
When the colour temperature of big brightness and the difference of desired value are more than difference threshold, then it represents that difference is larger, needs the maximum for reducing GAMMA.
The difference threshold can be 200K, 300K, 400K or 500K etc., and the unit of colour temperature is K（Kelvin）, this is the prior art.Difference
The value of threshold value can be set as needed.
In step s 200, the picture element signal of each region is corrected with the corresponding GAMMA curves in each region,
Obtain corresponding RGB data after each region corrects.Specifically, to every subregional picture element signal with respective region
GAMMA curves are corrected, and the RGB data after being corrected is exported.
In step S300, corresponding GAMMA voltages are adjusted according to the corresponding RGB data in each region, so that liquid crystal
Each region of display screen exports same grayscale signal in the case where same picture inputs.Specifically, shield body T-CON roots
According to each region RGB data and adjust corresponding GAMMA voltages, finally so that in the case of the input of same picture, output
Same grayscale signal ensure that the consistency of each field color.In practical application, the display picture for each region corresponds to
RGB data, apply corresponding GAMMA control voltage, different zones made to be shown under the input condition of the picture of same color
Same color.
With specific Application Example, that the present invention is described in detail is as follows below.
For television set, original image signal passes through the input terminal of television set（Such as HDMI）After input, television set
CPU image processing modules carry out it image information conversion, and the technical finesses such as image intensification are final to carry out at RGB color domain enhancing
Reason, television set GAMMA curves input to the T-CON of screen body after being corrected to it.
By taking two region of the left and right of plane has different colour temperatures because of screen bulk properties as an example.Picture signal is with grayscale signal
Example.Assuming that raw frames are the grayscale signal that RGB is 255（I.e. pure white picture）, but because screen body factor shows colour cast, performance
The grayscale signal for being 240 for left area actual displayed, the grayscale signal that right area actual displayed is 240, due to whole inclined
Same color is corrected it according to one group of GAMMA.
And since the factors such as parameter or fabrication error cause color partially different respectively at left and right sides of screen body, same grayscale
After 255 white field information input, corresponding left side actual displayed color is 240 close to left area actual displayed is shown as
Grayscale signal, the grayscale signal that right area actual displayed is 230.If corrected to it according to above-mentioned list GAMMA, such as with left side
On the basis of, after calibration, the picture on right side still reach to less than really close to 255 grayscale value.Screen body part colour cast is caused to ask
Topic still has.
About step S100, in practical operation, measuring instrument CA210 colored first（Or other testing tools such as CA310）
It is connected with computer by USB interface, computer follows the serial ports in intermediate concatenation MSTAR debug tool with television set by USB port
It is connected, colored measuring instrument CA210 optics receiving transducer Detector measure the colour signal for shielding the central point of body.This example
In, by taking required colour temperature is 9K-12K as an example.
Gamma curve, the Gamma measure pages, test condition are tested automatically with Mstar Tool：
Under the channels HDMI, turns off DLC/WLE/BLE, luminance contrast value is arranged to median, by RGB Gain/
Offset values are arranged to median.Setting：GL Step are gray scale step-length, default setting 8；Interval is interval time, is write from memory
Recognize 300ms；CA210 Channel are the channel used of CA210, which channel specifically just selects which channel；CA210
Speed gives tacit consent to Auto；Gamma Value selections 2.2, click Measure and start to test.The original Gamma of display screen is tested
After data, the corresponding x of filling target colour temperature, y values（Such as colour temperature 9780, x=0.282, y=0.290, uv<0.0005）, calculate
Software is written after preservation in the gamma curve of target colour temperature, and the x of different grey-scale, y values, and if aim colour are tested with CA210
The corresponding x of temperature, y values are close, then this group of gamma curve is just relatively more accurate；If x corresponding with target colour temperature, y values have partially
Difference, then also needing to carry out manual Gamma adjustment to gray level devious.
The RGB of gray level region pixel devious in image is read using the Data report functions of Mstar Tool
Value Data chooses Report Data to Gamma, clicks G icons thereafter, jumps to the Gamma pages, and the left side is Gamma songs
Line, the data on the right are the rgb values of every single order, and corresponding point is having partially for Data report feedbacks in the gamma curve of the left side
The gray level of difference constantly finely tunes the value of RB, and software is written, tests x, the y of this gray scale, towards the corresponding x of target colour temperature, y is close.
Gray level devious is debugged in repetition, and until the x of all gray levels, y values all meet the requirements, and is preserved, and Gamma debugging is completed.
The way of different main control chips slightly has difference, by taking Mstar main control chips as an example, Mstar main control chips subregion institute
There is signal input to share a gamma（In the application example, i.e., the signal input totally one first inside left area
Gamma, signal input inside right half area totally one the second gamma）, be written after software in the case where each channel is seen
The white balance effect of grayscale, if also deviation can adjust the RGB gain/offset amendments inside factory menu.It is former to shield body
Beginning GAMMA value measuring process is in the manner described above.
By liquid crystal display using center line as line of demarcation, correspondence is divided into left area and right half area, chooses left half respectively
The central point of region and right half area is measurement point, and left area is respectively obtained according to the GAMMA acquisition patterns after the above correction
With the original GAMMA curves of right half area.
Further, for GAMMA corrections are respectively adopted at left and right sides of screen.It is stored in terms of principle, by GAMMA parameters
In the screen ginseng file of TV, there are corresponding file first place, respectively Gamma Table -1 and Gamma in screen joins file
Table -2, corresponding each Gamma Table -1 or Gamma Table -2 stores the left region of correspondence and right region respectively
GAMMA curve values.Every group of parameter_r, parameter_g, parameter_b included below, i.e. R, G, B are corresponding
GAMMA correction data information.
To reach higher Adjustment precision, further, RGB Gain/Offset, that is, R, G, B offset need to be arranged two
Group corresponds to the micro adjustment of Gamma Table -1 and Gamma Table -2 respectively.It is adopted simultaneously for RGB Gain/Offset
With the mode of addressing of address, i.e., special reserved space, to meet the algorithm requirement of RGB Gain/Offset, i.e. RGB Gain/
Offset 1, RGB Gain/Offset 2 ... .RGB Gain/Offset N.In this example, due to there was only two groups of GAMMMA
RGB Gain/Offset 1 and RGB Gain/Offset are arranged in Gamma Table -1 and Table -2 Gamma, i.e. system
2 come into force.And RGB Gain/Offset 1 and 2 options of RGB Gain/Offset are written inside the ADC in factory menu,
Respective RGB option values are corresponded to below each option：
R-GAIN 128（According to 28For=256,128 be median, is more refined to adjust, can be by 210=256, at this time in
Between value be 512）
G-GAIN 128（According to 28For=256,128 be median, is more refined to adjust, can be by 210=256, at this time in
Between value be 512）
B-GAIN 128（According to 28For=256,128 be median, is more refined to adjust, can be by 210=256, at this time in
Between value be 512）
R-OFFSET 128（According to 28For=256,128 be median, is more refined to adjust, can be by 210=256, at this time
Median is 512）
G-OFFSET 128（According to 28For=256,128 be median, is more refined to adjust, can be by 210=256, at this time
Median is 512）
B-OFFSET 128（According to 28For=256,128 be median, is more refined to adjust, can be by 210=256, at this time
Median is 512）
Meanwhile its adjustment function is called to complete the correction of the adjusting to the GAMMA in each region.
For the original signal of each pixel, each pixel is stored with the luminance signal of original signal, colour gamut rgb value
Deng each region includes several pixels, and the coordinate in corresponding each region can use Block（i,j）It indicates, is from left to right expressed as
Line number Line（i）（The line number in i.e. detachable region, this can by menu input change）, the last one region is expressed as Block（m,
n）.M*n region is also divided into picture signal accordingly.In every piece the number of pixel then available resolution be multiplied after divided by
M*n, wherein m and n are not more than the positive integer of screen lines field pixel number respectively, by taking the screen of 3840*2160 resolution ratio as an example,
Then m is not more than 2160 no more than 3840, n.On corresponding software flow, GAMMA tables are initialized first.Obtain GAMMA
Quantity N（GAMMA is Gamma Table -1, Gamma Table -2 ... Gamma Table-N）, while obtaining screen and drawing
The line number Line divided（i）, detect Line（i）Whether it is virtual value, if being not virtual value, continues to obtain line number；As being to have
Valid value, then by picture pixel according to Line（i）Row, is divided into N equal portions, to every subregional picture element signal with respective region
GAMMA curves are corrected, and the RGB data after being corrected is exported.
Such as with N=2, Line（i）=1, that is, the entire display area of liquid crystal display is symmetrically divided into the left and right areas Liang Ge
Domain first initializes GAMMA tables.GAMMA quantity N=2 are obtained, while obtaining the line number Line of screen division（i）=1,
Detect Line（i）Whether it is virtual value, detects as virtual value, then picture pixel is divided into two equal portions, to every according to a line
Subregional picture element signal is corrected with the GAMMA curves in respective region, and the RGB data after being corrected is exported.
Shield body T-CON according to the RGB data of each region and adjust corresponding GAMMA voltages, finally so that same picture inputted
In the case of, same grayscale signal is exported, ensure that the consistency of each field color.
In practical application, also needing to be adjusted brightness.Rearmost ends of the Gamma as entire signal processing, Gamma
Adjustment can influence the whole of last brightness and embody, so needing that Gamma is first decided to the adjustment in terms of doing brightness again；
In YUV color spaces, brightness adjustment needs the requirement for meeting ITU-R BT.601/BT.709, i.e. Y level ranges are 16-235,
It just can guarantee the contrast requirement of signal in this way.Simultaneously because subarea processing, therefore need to ensure that liquid crystal display divides each
Brightness between a region is uniform with transition when grayscale.
The picture uniformity adjusting method of liquid crystal display provided by the invention, according to the quantity of screen ginseng file, to liquid crystal
The display area of display screen carries out region division, is divided into multiple regions, GAMMA is individually carried out to each region and is corrected place
Reason.For current scheme, in the case where not promoting hardware cost, to the domain test of GAMMA subregions and subregion school
Just, it solves the problems, such as the TV part colour cast because of caused by screen body consistency problem currently on the market, brings greatly side
Just.
Picture uniformity adjusting method based on above-mentioned liquid crystal display, the embodiment of the present invention additionally provide a kind of liquid crystal
The picture uniformity regulating system of display screen, as shown in Fig. 2, including：
It is corresponding to calculate each region for liquid crystal display to be divided into multiple regions for correction parameter acquisition module 10
GAMMA curves；Specifically as described in step S100；
Correction module 20 carries out school for the picture element signal to each region with the corresponding GAMMA curves in each region
Just, corresponding RGB data after each region corrects is obtained；Specifically as described in step S200；
Picture adjustment module 30, for adjusting corresponding GAMMA voltages according to the corresponding RGB data in each region, so that
Each region of liquid crystal display exports same grayscale signal in the case where same picture inputs；Specific such as step S300
It is described.
Further, the correction parameter acquisition module 10 includes：
Area division unit, for the display area of liquid crystal display to be divided into multiple regions；
Parameter calculation unit is giving 0-255 ranks each grayscale same color for testing each region by colored measuring instrument
Picture when corresponding GAMMA data, and the corresponding GAMMA curves in each region are calculated according to GAMMA data.
Further, the correction parameter acquisition module 10 includes：
Numerical value adjusts unit, in the GAMMA curves, when some pixel is in maximum brightness, adjusting and corresponding to
GAMMA maximum values make its be less than or equal to 255 grayscale.
Further, the picture adjustment module 30 includes：
Picture uniformity adjusts unit, for the corresponding RGB data of display picture for each region, applies corresponding
GAMMA controls voltage, and different zones is made to show same color under the input condition of the picture of same color.
In conclusion the picture uniformity adjusting method and system of a kind of liquid crystal display provided by the invention, pass through by
Liquid crystal display is divided into multiple regions, calculates the corresponding GAMMA curves in each region；The picture element signal of each region is used
The corresponding GAMMA curves in each region are corrected, and obtain corresponding RGB data after the correction of each region；According to each region
Corresponding RGB data adjusts corresponding GAMMA voltages, so that the feelings that each region of liquid crystal display is inputted in same picture
Under condition, same grayscale signal is exported；Improve the consistency of picture colour；And use current television frame structure, Bu Huizeng
Add hardware cost, brings to user and greatly facilitate.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect range.
Claims (6)
1. a kind of picture uniformity adjusting method of liquid crystal display, which is characterized in that including：
A, liquid crystal display is divided into multiple regions, calculates the corresponding GAMMA curves in each region；
B, the picture element signal of each region is corrected with the corresponding GAMMA curves in each region, obtains each region school
Corresponding RGB data after just；
C, corresponding GAMMA voltages are adjusted according to the corresponding RGB data in each region, so that each region of liquid crystal display exists
In the case of same picture input, same grayscale signal is exported；
In the GAMMA curves, when some pixel is in maximum brightness, adjusting corresponding GAMMA maximum values makes it be less than
Or it is equal to 255 grayscale；
When the difference of the colour temperature of maximum brightness and desired value is more than difference threshold, the maximum value for reducing GAMMA, control is needed to exist
When maximum brightness, GAMMA maximum values are below 255 grayscale.
2. the picture uniformity adjusting method of liquid crystal display according to claim 1, which is characterized in that the step A
It specifically includes：
A1, the display area of liquid crystal display is divided into multiple regions；
A2, each region corresponding GAMMA when to the picture of each grayscale same color of 0-255 ranks is tested by colored measuring instrument
Data, and the corresponding GAMMA curves in each region are calculated according to GAMMA data.
3. the picture uniformity adjusting method of liquid crystal display according to claim 1, which is characterized in that the step C
It specifically includes：
C1, the corresponding RGB data of display picture for each region apply corresponding GAMMA controls voltage, make different zones
Same color is shown under the input condition of the picture of same color.
4. a kind of picture uniformity regulating system of liquid crystal display, which is characterized in that including：
It is bent to calculate the corresponding GAMMA in each region for liquid crystal display to be divided into multiple regions for correction parameter acquisition module
Line；
Correction module is corrected with the corresponding GAMMA curves in each region for the picture element signal to each region, obtains
Corresponding RGB data after the correction of each region；
Picture adjustment module, for adjusting corresponding GAMMA voltages according to the corresponding RGB data in each region, so that liquid crystal
Each region of display screen exports same grayscale signal in the case where same picture inputs；
The correction parameter acquisition module includes：
Numerical value adjusts unit, in the GAMMA curves, when some pixel is in maximum brightness, adjusting corresponding
GAMMA maximum values make it be less than or equal to 255 grayscale；
When the difference of the colour temperature of maximum brightness and desired value is more than difference threshold, the maximum value for reducing GAMMA, control is needed to exist
When maximum brightness, GAMMA maximum values are below 255 grayscale.
5. the picture uniformity regulating system of liquid crystal display according to claim 4, which is characterized in that the correction ginseng
Counting acquisition module includes：
Area division unit, for the display area of liquid crystal display to be divided into multiple regions；
Parameter calculation unit, for testing each region in the picture to each grayscale same color of 0-255 ranks by colored measuring instrument
Corresponding GAMMA data when face, and the corresponding GAMMA curves in each region are calculated according to GAMMA data.
6. the picture uniformity regulating system of liquid crystal display according to claim 4, which is characterized in that the picture tune
Saving module includes：
Picture uniformity adjusts unit, for the corresponding RGB data of display picture for each region, applies corresponding
GAMMA controls voltage, and different zones is made to show same color under the input condition of the picture of same color.
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| KR102197270B1 (en) * | 2014-01-03 | 2021-01-04 | 삼성디스플레이 주식회사 | Method of compensating image of display panel, method of driving display panel including the same and display apparatus for performing the same |
| CN104809974B (en) * | 2015-04-22 | 2017-11-14 | 信利（惠州）智能显示有限公司 | The gamma and correct automatically white balance method and device of a kind of display device |
| CN104867455B (en) * | 2015-06-16 | 2017-05-03 | 深圳市华星光电技术有限公司 | System and method for compensating AMOLED voltage drop |
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