CN106952629A - For regular mura repair process method, compensation device and liquid crystal display - Google Patents
For regular mura repair process method, compensation device and liquid crystal display Download PDFInfo
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- CN106952629A CN106952629A CN201710326322.9A CN201710326322A CN106952629A CN 106952629 A CN106952629 A CN 106952629A CN 201710326322 A CN201710326322 A CN 201710326322A CN 106952629 A CN106952629 A CN 106952629A
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- mura
- offset datas
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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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
Abstract
The present invention relates to repair process method, compensation device and the liquid crystal display for regular mura.The repair process method includes：Step 10, calculate mura offset datas needed for each pixel；Step 20, distribution pattern of the mura offset datas in three-dimensional according to needed for each pixel, calculate the mura curved surfaces expression formula of best match and store in a flash memory；Step 30, the mura offset datas for storing some fixed position pixels in a flash memory；Step 40, timing controller read mura offset datas and mura curved surface expression formulas in the flash memory, and corresponding mura offset datas, the luma data after output mura compensation are calculated according to the location of pixels of the luma data of input.Present invention also offers corresponding compensation device and liquid crystal display.The present invention calculates the mura offset datas for completing all pixels position by the mura offset datas of its distribution curve and minimal amount of fixed pixel position for that can use the regular mura of curved surface formula approximate expression, reduces the use of flash capacity.
Description
Technical field
The present invention relates to field of liquid crystal, more particularly to a kind of repair process method for rule mura, compensation
Device and liquid crystal display.
Background technology
The flat display apparatus such as liquid crystal display (LCD) are because thin and have a wide range of application etc. excellent with high image quality, power saving, fuselage
Point, and it is each to be widely used in mobile phone, TV, personal digital assistant, digital camera, notebook computer, desktop computer etc.
Consumption electronic products are planted, as the main flow in display device.
As shown in Figure 1A, its be existing brightness unevenness compensation device structured flowchart.In order to solve on LCD processing procedures/device
Flaw and the brightness unevenness (mura) that produces, existing brightness unevenness compensation method be by gray scale compensation data storage with panel
(panel) in the flash memory (flash) 11 of collocation, then timing controller (TCON IC) 12 reads the mura stored in flash memory
Offset data, luma data input timing control chip 12, De-mura (brightness unevenness compensation) modules 13 compensate number according to mura
Grey decision-making is adjusted according to computing is carried out with luma data, then the luma data after the output of timing controller 12 mura compensation,
Change the brightness of pixel to reach brightness unevenness repair efficiency.As shown in Figure 1B, its be the original brightness unevenness of panel with it is bright it is dark not
The schematic diagram of equal offset data.The reverse gray scale compensation value for brightness unevenness position stored in flash memory, i.e. De-mura compensation numbers
According to：Ratio panels center bright region partially, offset is negative, reduces grey decision-making, dimmed；Ratio panels center is partially dark
Region, offset is positive number, improves grey decision-making, brightens.
Referring to Fig. 2, it is brightness unevenness offset data computational methods schematic diagram in the prior art.In the prior art, flash memory
The brightness unevenness offset data reference value of the middle storage each summit location of pixels in fixed intervals region (is illustrated in figure 2 8*8 fixation
Interval setting) A, B, C, D, brightness unevenness the offset data E, F, G of rest of pixels are by the bright of four summit pixels of 8*8 interval regions
Dark inequality offset data A, B, C, D carry out linear interpolation calculating and obtained.
As shown in figure 3, it sets bright using linear interpolation calculating for the fixed intervals in the prior art to 8*8 and 16*16
The effect diagram of dark inequality offset data.It can be seen that, when calculating brightness unevenness offset data using linear interpolation, 8*8 fixation
The fixed intervals that spaced linear compensation effect is better than 16*16 are set, closer with preferable mura offset datas.It is existing
The defect for having technology is, due to the resolution ratio more and more higher of panel, i.e. pixel is more and more, the brightness unevenness stored in flash memory
Compensating reference data also can be more and more, it is necessary to increase the memory capacity of flash memory；If expanding the setting in fixed intervals region (for example
16*16,32*32 etc.), the offset data computational methods shown in reference picture 2, if each summit in 16*16 or 32*32 fixed intervals region
The brightness unevenness offset data reference value A of location of pixels, B, C, D, brightness unevenness the offset data E, F, G of rest of pixels can be by
Brightness unevenness the offset data A, B, C, D of four summit pixels of 16*16 or 32*32 interval regions carry out linear interpolation and calculated
Arrive.
For 16*16 interval regions：
E=[(16-Y) * A+Y*C]/16；
F=[(16-Y) * B+Y*D]/16；
G=[(16-X) * E+X*F]/16.
For 32*32 interval regions：
E=[(32-Y) * A+Y*C]/32；
F=[(32-Y) * B+Y*D]/32；
G=[(32-X) * E+X*F]/32.
Then the linear interpolation evaluation of each pixel again can inaccurate (brightness unevenness be consolidated setting in fixed intervals region
Determine nonlinear change in interval region).
The content of the invention
It is an object of the invention to for that can use the regular mura of curved surface formula approximate expression, propose a kind of repair process
Method, reduces the use of flash capacity.
A further object of the present invention is for that can use the regular mura of curved surface formula approximate expression, propose a kind of compensation
Device, reduces the use of flash capacity.
Another object of the present invention is for that can use the regular mura of curved surface formula approximate expression, propose a kind of liquid crystal
Display, reduces the use of flash capacity.
To achieve the above object, the invention provides a kind of repair process method for rule mura, including：
Step 10, the bright darkness difference for shooting by camera panel whole viewing area, needed for calculating each pixel
Mura offset datas；
Step 20, distribution pattern of the mura offset datas in three-dimensional according to needed for each pixel, are calculated optimal
The mura curved surfaces expression formula of matching is simultaneously stored it in flash memory；
Step 30, the mura offset datas for storing in the flash memory some fixed position pixels；
Step 40, when carrying out mura repair processes, timing controller read mura offset datas in the flash memory and
Mura curved surface expression formulas, calculate corresponding mura offset datas, then further according to the location of pixels of the luma data of input
Export the luma data after mura compensation.
Wherein, the distribution pattern in three-dimensional be by x-axis of pixel plane coordinates, y-axis, with mura compensate number
Distributed in three dimensions according to size to be presented in the three-dimensional system of coordinate of z-axis.
Wherein, the distributed in three dimensions that the mura offset datas of the regular mura are presented in panel zone and in bright darkness
Can be by simple curved surface formula approximate expression.
Wherein, the distributed in three dimensions that the mura offset datas of the regular mura are presented in panel zone and in bright darkness
Distributed in three dimensions including being approximately cambered surface.
Wherein, the distributed in three dimensions that the mura offset datas of the regular mura are presented in panel zone and in bright darkness
Including being approximately wavy distributed in three dimensions.
Present invention also offers a kind of compensation device for rule mura, including flash memory and timing controller；The sudden strain of a muscle
Store mura curved surfaces expression formula and the mura offset datas of some fixed position pixels；, should when carrying out mura repair processes
Timing controller reads mura offset datas and mura curved surface expression formulas in the flash memory, further according to the luma data of input
Location of pixels calculate corresponding mura offset datas, then export mura compensation after luma data.
Wherein, the distributed in three dimensions that the mura offset datas of the regular mura are presented in panel zone and in bright darkness
Can be by simple curved surface formula approximate expression.
Wherein, the distributed in three dimensions that the mura offset datas of the regular mura are presented in panel zone and in bright darkness
Distributed in three dimensions including being approximately cambered surface.
Wherein, the distributed in three dimensions that the mura offset datas of the regular mura are presented in panel zone and in bright darkness
Including being approximately wavy distributed in three dimensions.
Present invention also offers a kind of liquid crystal display device, the liquid crystal display device is including above-mentioned for rule mura's
Compensation device.
To sum up, the present invention is directed to and can used for rule mura repair process method, compensation device and liquid crystal display
The regular mura of curved surface formula approximate expression, passes through its distribution curve and the mura offset datas of minimal amount of fixed pixel position
To calculate the mura offset datas for completing all pixels position, the use of flash capacity is reduced；Flash memory need to only store minimal amount of
Mura offset datas and mura curved surfaces distribution representation formula, you can obtain the whole face mura repair efficiencies of preferable panel.
Brief description of the drawings
Below in conjunction with the accompanying drawings, it is described in detail by the embodiment to the present invention, technical scheme will be made
And other beneficial effects are apparent.
In accompanying drawing,
Figure 1A is the structured flowchart of existing brightness unevenness compensation device；
Figure 1B is the schematic diagram of the original brightness unevenness of panel and brightness unevenness offset data；
Fig. 2 is brightness unevenness offset data computational methods schematic diagram in the prior art；
Fig. 3 is set using linear interpolation calculating brightness unevenness compensation for the fixed intervals in the prior art to 8*8 and 16*16
The effect diagram of data；
Fig. 4 is principle schematic of the present invention for rule mura repair process method；
Fig. 5 is schematic diagram of the present invention for the rule mura preferred embodiment of repair process method one；
Fig. 6 is structured flowchart of the present invention for the rule mura preferred embodiment of compensation device one；
Fig. 7 is flow chart of the present invention for rule mura repair process method.
Embodiment
Referring to Fig. 4, it is principle schematic of the present invention for rule mura repair process method.Mura is in panel area
A distributed in three dimensions is presented in domain and in bright darkness (can be using pixel point coordinates and compensation GTG numerical values recited as three-dimensional
Coordinate), can be by a fairly simple curved surface for regular mura, that is, when mura distributed in three dimensions has systematicness
During formula approximate expression, such as cambered surface (surrounding is uniformly partially bright or partially dark), wavy (equally spaced bright, dark alternately change), then
The mura offsets of a small amount of fixed pixel position and curved surface expression formula can be stored in a flash memory, greatly reduce storage
Flash capacity needed for mura offset data reference values.It will be understood by those skilled in the art that by the expression formula of curved surface with
And according to the mura offset datas of some previously selected fixed positions of curved surface expression formula, you can to draw other positions
Mura offset datas, set compared to fixed intervals in the prior art and calculate brightness unevenness offset data when institute using linear interpolation
The a large amount of reference datas that need to be stored, it is a small amount of that the present invention, which needs the mura offset datas of the fixed position stored,.
Referring to Fig. 7, it is flow chart of the present invention for rule mura repair process method.This method mainly includes：
Step 10, the bright darkness difference for shooting by camera panel whole viewing area, needed for calculating each pixel
Mura offset datas；Using the camera of mura repair apparatus after the bright darkness difference of the whole viewing area of panel is photographed,
The GTG of compensation needed for calculating each pixel；Step 20, the mura offset datas according to needed for each pixel are in three-dimensional
On distribution pattern, calculate the mura curved surfaces expression formula of best match and store it in flash memory；According in step 10
Distribution of these gray scale compensation data calculated on three-dimensional (x, y are pixel point coordinates, and z is compensation GTG numerical values recited)
Figure, calculates the curved surface expression formula of best match；
Step 30, the mura offset datas for storing in the flash memory some fixed position pixels；
Step 40, when carrying out mura repair processes, timing controller read mura offset datas in the flash memory and
Mura curved surface expression formulas, calculate corresponding mura offset datas, then further according to the location of pixels of the luma data of input
Export the luma data after mura compensation.Timing controller read from flash memory the mura offset datas of fixed position pixel with
And after mura curved surface expression formulas, the mura offset datas of the location of pixels of the luma data of input and fixed position pixel are made
Mura curved surface expression formulas are substituted into for parameter, the mura offset datas of non-fixed position pixel are obtained by NONLINEAR CALCULATION.
Referring to Fig. 5, it is schematic diagram of the present invention for the rule mura preferred embodiment of repair process method one.Pass through
The camera of mura repair apparatus is after the bright darkness difference of the whole viewing area of panel is photographed, needed for calculating each pixel
The luma data of compensation, then according to these gray scale compensation data, in three-dimensional, (x, y are pixel point coordinates, and z is compensation GTG numerical value
Size) on distribution pattern, calculate the expression formula of the curved surface mura forms of best match, those skilled in the art can be with comprehensive
Close and consider the complexity for the compensation precision and expression formula to be reached to choose the expression formula of best match, this expression is public
Formula is stored in flash memory 51, stores the mura offset datas of a small amount of fixed position pixel in flash memory 51 again, and timing controller is read
Get after the offset data and expression formula in flash memory 51, corresponding mura benefits are calculated further according to the location of pixels of input data
Data are repaid, mura repairings are completed.
Referring to Fig. 6, it is structured flowchart of the present invention for the rule mura preferred embodiment of compensation device one.The present invention
Compensation device for regular mura mainly includes flash memory 61 and timing controller 62；The flash memory 61 storage mura curved surface expression
The mura offset datas of formula and some fixed position pixels；When carrying out mura repair processes, the De- of the timing controller 62
Mura modules 63 read the mura offset datas and mura curved surface expression formulas in the flash memory 61, further according to the luma data of input
Location of pixels calculate to calculate corresponding mura offset datas by NONLINEAR CALCULATION rather than linear interpolation, then export
Luma data after mura compensation.Regular mura refers to three that its mura offset data is presented in panel zone and in bright darkness
Tieing up distribution can be by simple curved surface formula approximate expression.Regular mura mura offset datas are in panel zone and bright darkness
On the distributed in three dimensions that is presented can include be approximately cambered surface distributed in three dimensions.Regular mura mura offset datas are in panel area
It is approximately wavy distributed in three dimensions that the distributed in three dimensions presented in domain and in bright darkness, which can also include,.
By applying the above-mentioned compensation device for rule mura, present invention also offers corresponding liquid crystal display device.
To sum up, the present invention is directed to and can used for rule mura repair process method, compensation device and liquid crystal display
The regular mura of curved surface formula approximate expression, passes through its distribution curve and the mura offset datas of minimal amount of fixed pixel position
To calculate the mura offset datas for completing all pixels position, the use of flash capacity is reduced；Flash memory need to only store minimal amount of
Mura offset datas and mura curved surfaces distribution representation formula, you can obtain the whole face mura repair efficiencies of preferable panel.
The above, for the person of ordinary skill of the art, can be with technique according to the invention scheme and technology
Other various corresponding changes and deformation are made in design, and all these changes and deformation should all belong to appended right of the invention
It is required that protection domain.
Claims (10)
1. a kind of repair process method for rule mura, it is characterised in that including：
Step 10, the bright darkness difference for shooting by camera panel whole viewing area, needed for calculating each pixel
Mura offset datas；
Step 20, distribution pattern of the mura offset datas in three-dimensional according to needed for each pixel, calculate best match
Mura curved surfaces expression formula and store it in flash memory；
Step 30, the mura offset datas for storing in the flash memory some fixed position pixels；
When step 40, progress mura repair processes, the mura offset datas and mura that timing controller is read in the flash memory are bent
Face expression formula, calculates corresponding mura offset datas further according to the location of pixels of the luma data of input, then exports
Luma data after mura compensation.
2. rule mura repair process method is directed to as claimed in claim 1, it is characterised in that point in three-dimensional
Cloth figure be by x-axis of pixel plane coordinates, y-axis, using mura offset datas size as the three-dimensional system of coordinate of z-axis in present
Distributed in three dimensions.
3. rule mura repair process method is directed to as claimed in claim 1, it is characterised in that the regular mura's
Mura offset datas can be by the approximate table of simple curved surface formula with the distributed in three dimensions presented in bright darkness in panel zone
Reach.
4. rule mura repair process method is directed to as claimed in claim 3, it is characterised in that the regular mura's
Mura offset datas distributed in three dimensions for being presented in panel zone and in bright darkness include be approximately cambered surface distributed in three dimensions.
5. rule mura repair process method is directed to as claimed in claim 3, it is characterised in that the regular mura's
It is approximately wavy distributed in three dimensions that the distributed in three dimensions that mura offset datas are presented in panel zone and in bright darkness, which includes,.
6. a kind of compensation device for rule mura, it is characterised in that including flash memory and timing controller；The flash memory storage
The mura offset datas of mura curved surfaces expression formula and some fixed position pixels；When carrying out mura repair processes, the sequential control
Coremaking piece reads mura offset datas and mura curved surface expression formulas in the flash memory, further according to the pixel of the luma data of input
Position calculates corresponding mura offset datas, then exports the luma data after mura compensation.
7. rule mura compensation device is directed to as claimed in claim 6, it is characterised in that the mura of the regular mura is mended
Repaying data can be by simple curved surface formula approximate expression with the distributed in three dimensions presented in bright darkness in panel zone.
8. rule mura compensation device is directed to as claimed in claim 7, it is characterised in that the mura of the regular mura is mended
Repay data in panel zone and in bright darkness the distributed in three dimensions that is presented include be approximately cambered surface distributed in three dimensions.
9. rule mura compensation device is directed to as claimed in claim 7, it is characterised in that the mura of the regular mura is mended
Repay data includes being approximately wavy distributed in three dimensions in panel zone with the distributed in three dimensions presented in bright darkness.
10. a kind of liquid crystal display device, it is characterised in that the liquid crystal display device is included as described in any one of claim 6 to 9
The compensation device for rule mura.
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| CN201710326322.9A CN106952629B (en) | 2017-05-10 | 2017-05-10 | Repairing method, compensating device and liquid crystal display aiming at regular mura |
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| CN201710326322.9A CN106952629B (en) | 2017-05-10 | 2017-05-10 | Repairing method, compensating device and liquid crystal display aiming at regular mura |
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| CN107680526A (en) * | 2017-10-13 | 2018-02-09 | 深圳吉迪思电子科技有限公司 | A kind of brightness Mura compensation methodes |
| WO2019037169A1 (en) * | 2017-08-25 | 2019-02-28 | 惠科股份有限公司 | Method for optimizing brightness compensation, and pre-processing apparatus |
| CN109801581A (en) * | 2019-01-31 | 2019-05-24 | 武汉天马微电子有限公司 | Display panel compensation grayscale value determines method and apparatus, display device |
| CN110689843A (en) * | 2019-08-19 | 2020-01-14 | 昆山国显光电有限公司 | Demura system and method and electronic equipment |
| US10540942B2 (en) | 2017-08-25 | 2020-01-21 | HKC Corporation Limited | Optimization method and pre-stage device for brightness compensation |
| CN113393811A (en) * | 2020-03-12 | 2021-09-14 | 咸阳彩虹光电科技有限公司 | Novel brightness unevenness compensation method and device and display panel |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL Huaxing Photoelectric Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |