CN107680526A - A kind of brightness Mura compensation methodes - Google Patents

A kind of brightness Mura compensation methodes Download PDF

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Publication number
CN107680526A
CN107680526A CN201710954087.XA CN201710954087A CN107680526A CN 107680526 A CN107680526 A CN 107680526A CN 201710954087 A CN201710954087 A CN 201710954087A CN 107680526 A CN107680526 A CN 107680526A
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image
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田琪
钟钢
李方武
白华
肖本懿
李奎兵
姚飞
谢青青
张玉飞
孙丽娜
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Shenzhen Kyrgyzstan Meredith Electronic Technology Co Ltd
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Shenzhen Kyrgyzstan Meredith Electronic Technology Co Ltd
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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

Present invention is disclosed a kind of brightness Mura compensation methodes, the gray scale image shown including the use of shooting resolver shooting display panel under each GTG；Image resolver and obtain the gray level information of each pixel cell in each gray scale image, and generate the luminance compensation image corresponding with each gray scale image；Luminance compensation formula is generated according to each luminance compensation image；Object brightness compensation image is generated according to luminance compensation formula；Object brightness compensation image is mixed into final image with original image.The present invention can according to original image information it is instant luminance compensation is carried out to each pixel cell, make color displays more gorgeous, effectively improve the Mura phenomenons of display panel, improve the yields of panel, and luminance compensation formula is only stored in the storage medium of driving chip, reduce the capacity of storage medium, reduce production cost.

Description

A kind of brightness Mura compensation methodes
Technical field
The present invention relates to a kind of display technology field, more particularly, to a kind of brightness Mura compensation methodes.
Background technology
Mura phenomenons refer to because some uncontrollable factors in production process cause each pixel cell on display panel Physical characteristic have differences so that the brightness irregularities phenomenon that occurs when display panel shows gray level image.
In order to avoid the generation of Mura phenomenons, the general of Mura phenomenons occurs to reduce display panel by improving production technology Rate, but can still produce the display panel that Mura phenomenons be present.
In the existing technology for improving display panel Mura phenomenons, it is common practice to divide in basic, normal, high grey-scale range Do not sample, shoot the gray scale image in the case where sampling GTG respectively, deposit is aobvious after calculating brightness offset value according to luminance compensation image Show in the storage medium of panel, the capacity of storage medium is increased by way of accessing picture, and sample few, the effect of display Fruit is bad.
In addition, the brightness of each pixel cell is different and different according to the image of display, traditional luminance compensation method is not Dynamic regulation can be realized according to the difference of image so that final display effect is undesirable.
The content of the invention
The defects of it is an object of the invention to overcome prior art, there is provided a kind of brightness Mura compensation methodes, can improve The Mura phenomenons of display panel, and the capacity of storage medium on display panel can be reduced.
To achieve the above object, the present invention proposes following technical scheme：A kind of brightness Mura compensation methodes, including following step Suddenly：
Step S1, the gray scale image shown using shooting resolver shooting display panel under each GTG；
Step S2, the shooting resolver obtain the gray level information of each pixel cell in each gray scale image, and raw Into the luminance compensation image corresponding with each gray scale image；
Step S3, the luminance compensation formula of each luminance compensation image generation corresponding thereto, each luminance compensation is public Formula is as follows：
Wherein, x represents the abscissa of pixel cell, and y represents the ordinate of pixel cell, and z represents brightness offset value, g ashes Exponent number amount, m represent display panel width pixel count, and n represents display panel length pixel count, and m, n are the integer more than 1；
Step S4, object brightness compensation image is generated according to the luminance compensation formula；
Step S5, the object brightness is compensated into image and is mixed into final image with original image.
Preferably, in step sl, grey-scale range is selected from 0~2^8, 0~2^10, 0~2^12, 0~2^16In one kind.
Preferably, the shooting resolver includes video camera and computer, and the video camera is used to obtain each GTG The monochrome information of all pixels unit in image, and the resolution ratio of the video camera is more than or equal to the resolution ratio of display panel；
The computer is used to generate luminance compensation image according to the monochrome information of each pixel cell, and is mended according to brightness Repay image generation luminance compensation formula.
Preferably, luminance compensation image is generated luminance compensation formula by the computer by Fourier transformation.
Preferably, the luminance compensation formula is stored in the storage medium of driving chip on a display panel.
Preferably, the generation of the luminance compensation image comprises the following steps：
Step 201, the M luminance compensations for including P row Q list lattice are established according to the resolution ratio of grey-scale range and display panel It is worth table, wherein, M represents GTG quantity, and P represents display panel length pixel count, and Q represents display panel width pixel count, M, P, Q It is the integer more than 1；
Step 202, the gray level information of each pixel cell in each gray scale image and shooting current gray image are used Grey decision-making compare, obtain the brightness offset value of each pixel cell in each gray scale image, and inserted luminance compensation It is worth in table；
Step 203, luminance compensation image is generated according to the brightness offset value of each pixel cell in each gray scale image.
Preferably, it is additionally included in step 201 in brightness offset value table and establishes direct coordinate system, the luminance compensation figure Each pixel cell includes coordinate information and luminance compensation value information as in.
Preferably, in step s 4, the generation of the object brightness compensation image includes：
Step 401, the gray level information and coordinate information of each pixel cell in original image are obtained；
Step 402, object brightness offset is obtained according to the gray level information and coordinate information；
Step 403, object brightness compensation image is generated according to the object brightness offset.
Preferably, in step 402, the object brightness offset is included：By the coordinate information substitute into Object brightness offset is calculated in the luminance compensation formula that gray level information matches.
Preferably, in step s 5, the monochrome information of each pixel cell of original image and object brightness are compensated into image The monochrome information of each pixel cell is corresponding to be added the intrinsic brilliance value for obtaining each pixel cell in original image.
The beneficial effects of the invention are as follows：
(1) present invention can according to original image information it is instant luminance compensation is carried out to each pixel cell, effectively change It has been apt to the Mura phenomenons of display panel；
(2) luminance compensation formula is only accessed on display panel in the storage medium of driving chip, reduces storage medium Capacity, reduce production cost；
(3) by generating the luminance compensation formula under all GTGs so that each pixel cell can obtain under each GTG To compensation, the accuracy that display panel is shown is improved.
Brief description of the drawings
Fig. 1 is the brightness Mura compensation method flow chart schematic diagrames of the present invention；
Fig. 2 is generation luminance compensation image method flow chart schematic diagram in Fig. 1；
Fig. 3 is the luminance compensation image schematic diagram of the present invention；
Fig. 4 is that object brightness compensation image method flow chart schematic diagram is generated in Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme of the embodiment of the present invention.
A kind of disclosed brightness Mura compensation methodes, can be according to the ash of each pixel cell on original image Rank information flexibly carries out luminance compensation to each pixel cell on display panel, improves the Mura phenomenons of display panel.
As shown in figure 1, a kind of method of brightness Mura compensation, comprises the following steps：
Step S1, the gray scale image shown using shooting resolver shooting display panel under each GTG；
Step S2, shooting resolver obtain the gray level information of each pixel cell in each gray scale image, and generate with The corresponding luminance compensation image of each gray scale image；
Specifically, because display panel has a Mura phenomenons, each pixel cell is shown on display panel under same GTG Brightness can have difference, the brightness normal value that shows or brightness under current gray be less than to brightness be higher than under current gray and show The pixel cell of the normal value shown carries out luminance compensation, to cause the brightness that each pixel cell is shown under same GTG homogeneous Together, therefore, it is necessary to luminance compensation is carried out to each pixel cell on display panel under each GTG.In the present embodiment, GTG model 0~2^ can be chosen by enclosing8, 0~2^10, 0~2^12, 0~2^16In one kind, a certain segment therein can also be chosen, or Choose several discrete grey decision-makings.
Shooting resolver includes video camera and computer.Shooting resolver first has to set video camera before shooting Resolution ratio, be larger than or the resolution ratio equal to display panel, it is ensured that video camera can obtain display during taking pictures The monochrome information of all pixels unit on panel.Computer is used to analyze monochrome information, is generated according to monochrome information bright Degree compensation image, luminance compensation formula etc., and luminance compensation formula is write to the storage medium of driving chip on display panel In.In the present embodiment, luminance compensation image is generated luminance compensation formula by computer by Fourier transformation.
Display panel is lighted according to the grey-scale range of setting successively, video camera, which can be captured in each gray scale image, to be owned The gray level information of pixel cell, and the gray level information of all pixels unit in each gray scale image is stored into computer, count Calculation machine generates luminance compensation image according to the gray level information of all pixels unit in each gray scale image.Wherein, as shown in Fig. 2 The generation of luminance compensation image comprises the following steps：
Step 201, the M luminance compensations for including P row Q list lattice are established according to the resolution ratio of grey-scale range and display panel It is worth table, wherein, M represents GTG quantity, and P represents display panel length pixel count, and Q represents display panel width pixel count, M, P, Q It is the integer more than 1；
Step 202, the gray level information of each pixel cell in each gray scale image and shooting current gray image are used Grey decision-making compare, obtain the brightness offset value of each pixel cell in each gray scale image, and inserted luminance compensation It is worth in table；
Step 203, the generation of brightness offset value table is corresponding with each gray scale image according to corresponding to each gray scale image Luminance compensation image.
Further, it is additionally included in step 201 in brightness offset value table and establishes direct coordinate system so that ultimately generates Luminance compensation image in each pixel cell include coordinate information and luminance compensation value information.
Specifically, as shown in figure 3, enter by taking the display panel that resolution ratio is 1920x1080, grey-scale range is 0~255 as an example Row detailed description：
First, 256 brightness offset value tables are established according to grey-scale range 0~255, will be every according to resolution ratio 1920x1080 Open brightness offset value table and be divided into 1920 rows and 1080 list lattice.Rectangular coordinate system is established in every brightness offset value table, then Each pixel cell has a coordinate (x, y), if the coordinate of the A pixel cells in figure is (1,1), the coordinate of B pixel cells For (1920,1080).
Secondly, the brightness value that each pixel cell needs to compensate is calculated.Exemplified by the gray scale image shot when 0 GTG.0 During GTG, by the brightness value of each pixel cell compared with 0 relatively after, brightness offset value is sequentially stored into first brightness offset value In table, as cameras capture in pixel cell A brightness value be 1, then brightness offset value 1 is inserted into first brightness offset value table Pixel cell A in.Similarly calculated under other GTGs.Eventually form 256 brightness offset value tables.
Finally, 256 luminance compensation images are formed according to 256 brightness offset value tables.
Step S3, luminance compensation formula is generated according to each luminance compensation image respectively；
Specifically, introducing variable z represents brightness offset value, contained in each luminance compensation image of above-mentioned generation every The coordinate information and intensity compensation information of individual pixel cell, can be each gray-scale figure according to coordinate information, intensity compensation information As establishing luminance compensation formula.
Luminance compensation formula is as follows：
Wherein, x represents the abscissa of pixel cell, and y represents the ordinate of pixel cell, and z represents brightness offset value, g ashes Exponent number amount, m represent display panel width pixel count, and n represents display panel length pixel count, and m, n, g are the integer more than 1.
Certainly, above-mentioned formula can also be expressed using a function formula, as follows：
Wherein, x represents the abscissa of pixel cell, and y represents the ordinate of pixel cell, and z represents brightness offset value, g ashes Exponent number amount, m represent display panel width pixel count, and n represents display panel length pixel count, and m, n, g are the integer more than 1.
In above-mentioned each formula, input coordinate value is only needed, you can obtain the brightness offset value of the pixel cell.Display surface Plate is during display image, and the brightness value of same pixel cell is according to the different and different of display target image, such as picture Plain unit A, when showing the first width target image, it is necessary to brightness value be 60, when showing the second width target image, it is necessary to Brightness value is 40.When brightness value is 60, need to only substitute into the coordinate of the point in the luminance compensation formula that GTG is 60 to obtain Obtain brightness offset value；When brightness is 40, need to only substitute into the coordinate of the point in the luminance compensation formula that GTG is 40 to obtain Obtain brightness offset value.
Finally, computer writes luminance compensation formula into the storage medium of driving chip on display panel, is driving Formula is stored in the storage medium of chip can reduce the capacity of storage medium for storage photo, further reduce life Produce cost.
Step S4, object brightness compensation image is generated according to the luminance compensation formula；
Step S5, the object brightness is compensated into image and is mixed into final image with original image.
Specifically, display panel includes MCU (Micro Control Unit, micro-control unit), driving chip, core is driven Piece is provided with the storage medium for being used for storing luminance compensation formula.As shown in figure 4, when MCU receives original image, to original Image is analyzed, and obtains the gray level information and coordinate information of each pixel cell, call in storage medium with gray level information phase The luminance compensation formula of matching, coordinate information, which is substituted into luminance compensation formula, can calculate object brightness offset, finally may be used When obtaining the display original image, each pixel cell needs the brightness value compensated, and bright according to brightness offset value generation target Degree compensation image.The object brightness offset of each pixel cell and each pixel in original image in object brightness compensation image The grey decision-making of unit is corresponding to be added, and obtains the actual gray value of each pixel cell in final image.Such as, when being sat in original image The grey decision-making for being designated as the pixel cell of (1,1) is 60, and coordinate value is substituted into formula f60Obtaining brightness offset value after in (x, y, z) is + 2, i.e. the pixel cell of coordinate (1,1) needs to compensate two brightness values；And for example, coordinate is the pixel cell of (1920,1080) Grey decision-making is 30, and coordinate value is substituted into formula f by this30Brightness offset value is obtained after in (x, y, z) as -2, i.e., brightness it is too high, it is necessary to Brightness is reduced, now, the luma unit needs to reduce by two brightness on display panel.If the z values obtained are 0, then it represents that the picture Plain unit need not carry out luminance compensation.
Display panel drives corresponding pixel cell to show corresponding brightness by the way that brightness offset value is converted into electric current.
Object brightness compensation image is mixed into final image with target image.
The present invention can according to target image information it is instant luminance compensation is carried out to each pixel cell, effectively improve The Mura phenomenons of display panel.
The technology contents and technical characteristic of the present invention have revealed that as above, but those skilled in the art still may base Make a variety of replacements and modification without departing substantially from spirit of the present invention, therefore, the scope of the present invention in teachings of the present invention and announcement The content disclosed in embodiment should be not limited to, and various replacements and modification without departing substantially from the present invention should be included, and is this patent Shen Please claim covered.

Claims (10)

1. a kind of brightness Mura compensation methodes, it is characterised in that comprise the following steps：
Step S1, the gray scale image shown using shooting resolver shooting display panel under each GTG；
Step S2, shooting resolver obtain the gray level information of each pixel cell in each gray scale image, and generate with it is each The corresponding luminance compensation image of gray scale image；
Step S3, by the luminance compensation formula of each luminance compensation image generation corresponding thereto, each luminance compensation formula is such as Under：
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Wherein, x represents the abscissa of pixel cell, and y represents the ordinate of pixel cell, and z represents brightness offset value, and g is GTG Quantity, m represent display panel width pixel count, and n represents display panel length pixel count, and m, n are the integer more than 1；
Step S4, object brightness compensation image is generated according to the luminance compensation formula；
Step S5, the object brightness is compensated into image and is mixed into final image with original image.
2. according to the method for claim 1, it is characterised in that in step sl, grey-scale range is selected from 0~2^8, 0~2 ^10, 0~2^12, 0~2^16In one kind.
3. according to the method for claim 1, it is characterised in that the shooting resolver includes video camera and computer, The video camera is used for the monochrome information for obtaining all pixels unit in each gray scale image, and the resolution ratio of the video camera is big In or equal to display panel resolution ratio；
The computer is used to generate luminance compensation image according to the monochrome information of each pixel cell, and according to luminance compensation figure As generation luminance compensation formula.
4. according to the method for claim 3, it is characterised in that the computer is by Fourier transformation by luminance compensation figure As generation luminance compensation formula.
5. the method according to claim 3 or 4, it is characterised in that the luminance compensation formula storage is on a display panel In the storage medium of driving chip.
6. according to the method for claim 3, it is characterised in that the generation of the luminance compensation image comprises the following steps：
Step 201, the M brightness offset values for including P row Q list lattice are established according to the resolution ratio of grey-scale range and display panel Table, wherein, M represents GTG quantity, and P represents display panel length pixel count, and Q represents display panel width pixel count, and M, P, Q are equal For the integer more than 1；
Step 202, the ash gray level information of each pixel cell in each gray scale image used with shooting current gray image Rank value compares, and obtains the brightness offset value of each pixel cell in each gray scale image, and is inserted brightness offset value table In；
Step 203, brightness offset value table generates the brightness corresponding with each gray scale image according to corresponding to each gray scale image Compensate image.
7. according to the method for claim 5, it is characterised in that be additionally included in brightness offset value table and build in step 201 Direct coordinate system is found, each pixel cell includes coordinate information and luminance compensation value information in the luminance compensation image.
8. according to the method for claim 6, it is characterised in that in the step S4, the object brightness compensation image Generation includes：
Step 401, the gray level information and coordinate information of each pixel cell in original image are obtained；
Step 402, object brightness offset is obtained according to the gray level information and coordinate information；
Step 403, object brightness compensation image is generated according to the object brightness offset.
9. according to the method for claim 8, it is characterised in that in step 402, the acquisition of the object brightness offset Including：The coordinate information is substituted into object brightness offset is calculated in the luminance compensation formula to match with gray level information.
10. according to the method for claim 8, it is characterised in that in step s 5, every in the object brightness compensation image The object brightness offset of individual pixel cell is corresponding with the grey decision-making of each pixel cell in original image to be added, and obtains final figure The actual gray value of each pixel cell as in.
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CN111583863A (en) * 2020-05-25 2020-08-25 昆山国显光电有限公司 Mura compensation method and device and display panel
CN111883058A (en) * 2020-08-17 2020-11-03 武汉天马微电子有限公司 Display panel brightness compensation method and device and display device
CN112985767A (en) * 2021-02-06 2021-06-18 深圳精智达技术股份有限公司 Method for shooting pixel brightness of display panel and related device
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CN108492776A (en) * 2018-03-29 2018-09-04 苏州佳智彩光电科技有限公司 A kind of AMOLED screens brightness disproportionation intelligent external optical compensation method
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CN108877736A (en) * 2018-05-31 2018-11-23 昆山国显光电有限公司 Eliminate compensation method and the device of screen body brightness disproportionation
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CN111883058A (en) * 2020-08-17 2020-11-03 武汉天马微电子有限公司 Display panel brightness compensation method and device and display device
CN112985767B (en) * 2021-02-06 2022-01-25 深圳精智达技术股份有限公司 Method and related device for shooting pixel brightness of display panel
CN112985767A (en) * 2021-02-06 2021-06-18 深圳精智达技术股份有限公司 Method for shooting pixel brightness of display panel and related device
CN113674719A (en) * 2021-08-17 2021-11-19 晟合微电子(肇庆)有限公司 Mura compensation information generation method, device, equipment, medium and Mura compensation method
CN114242013A (en) * 2021-12-17 2022-03-25 海宁奕斯伟集成电路设计有限公司 Method and device for eliminating brightness mura defect of liquid crystal display
CN114242013B (en) * 2021-12-17 2022-12-02 海宁奕斯伟集成电路设计有限公司 Method and device for eliminating brightness mura defect of liquid crystal display
CN114299881A (en) * 2021-12-23 2022-04-08 豪威触控与显示科技(深圳)有限公司 Compensation method and compensation device of pixel circuit
CN114299881B (en) * 2021-12-23 2023-05-26 豪威触控与显示科技(深圳)有限公司 Compensation method and compensation device for pixel circuit

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