CN107203056B - Mura processing method for ultrahigh-resolution panel - Google Patents
Mura processing method for ultrahigh-resolution panel Download PDFInfo
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- CN107203056B CN107203056B CN201710365546.0A CN201710365546A CN107203056B CN 107203056 B CN107203056 B CN 107203056B CN 201710365546 A CN201710365546 A CN 201710365546A CN 107203056 B CN107203056 B CN 107203056B
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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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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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
Abstract
The invention relates to a mura processing method for an ultrahigh-resolution panel. The method comprises the following steps: step 10, shooting the actual mura state of the whole panel in different areas by using an industrial camera according to the resolution of the industrial camera, and displaying 0 gray scale in the rest areas of the panel when the gray scale of a certain area of the shot panel is displayed; step 20, respectively obtaining a mura compensation data matrix of each area of the panel according to the pre-obtained corresponding relation between the gray scale and the brightness of the panel and the actual mura state of each area of the panel; and step 30, combining the mura compensation data matrixes of each area of the panel to obtain a mura compensation data matrix corresponding to the whole panel, and selecting corresponding mura compensation data according to the set compensation data reference value position. The mura processing method for the ultra-high resolution panel reasonably utilizes the industrial camera specification of the existing mura compensation system, realizes the accurate mura compensation of the ultra-high resolution panel, and reduces the high cost brought by the specification replacement of the industrial camera in the mura compensation system.
Description
Technical Field
The invention relates to the field of liquid crystal displays, in particular to a mura processing method for an ultrahigh-resolution panel.
Background
Flat panel display devices such as Liquid Crystal Displays (LCDs) have advantages such as high image quality, power saving, thin body, and wide application range, and thus are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and are becoming the mainstream of display devices.
As shown in fig. 1A, it is a block diagram of a conventional luminance/dark unevenness compensation apparatus. In order to solve the mura caused by the defects in the LCD process/device, the conventional mura compensation method stores the gray scale compensation data in a flash memory (flash)11 collocated with a panel (panel), then a timing control chip (TCON IC)12 reads the mura compensation data stored in the flash memory, the gray scale data is input to the timing control chip 12, a De-mura compensation module 13 performs an operation according to the mura compensation data and the gray scale data to adjust the gray scale value, and then the timing control chip 12 outputs the gray scale data after mura compensation to change the brightness of the pixels to achieve the mura repairing effect. FIG. 1B is a diagram illustrating the original panel shading and shading compensation data. In order to solve the brightness and darkness unevenness (mura) generated on the LCD panel, the prior mura compensation system shoots the actual mura distribution condition of the panel by an external camera, then calculates the gray level value required to be compensated in other areas by comparing the brightness of the central position of the panel, and calculates the area which is brighter than the central position of the panel, wherein the compensation value is a negative number, reduces the gray level value and becomes dark; in the area darker than the central position of the panel, the compensation value is positive, the gray scale value is increased, and the brightness is increased. The reverse gray scale compensation value of the position with uneven brightness, namely De-mura compensation data, is stored in the flash memory.
As shown in fig. 2, which is a schematic diagram of a photosensitive element of a camera corresponding to a pixel on a panel. For example, for a panel with 3840 × 2160 resolution, it is most desirable that each photosensitive element of the camera is capable of corresponding to each pixel on the panel, so that the brightness value of each pixel on the panel can be obtained, which is beneficial to mura compensation effect, and the camera needs to reach at least over 830 ten thousand pixels.
With the advent of ultra-high resolution panels, cameras corresponding to mura compensation systems also need to be updated correspondingly, otherwise, each photosensitive element of a camera needs to correspond to multiple panel pixels at the same time, which affects the accuracy of compensation data, but the cost for frequently updating industrial cameras is very high.
Disclosure of Invention
The invention aims to provide a mura processing method for an ultrahigh-resolution panel, which utilizes the industrial camera specification of the existing mura compensation system to realize the mura compensation processing of the ultrahigh-resolution panel.
In order to achieve the above object, the present invention provides a mura processing method for an ultra-high resolution panel, comprising:
step 10, shooting the actual mura state of the whole panel in different areas by using an industrial camera according to the resolution of the industrial camera, and displaying 0 gray scale in the rest areas of the panel when the gray scale of a certain area of the shot panel is displayed;
step 20, respectively obtaining a mura compensation data matrix of each area of the panel according to the pre-obtained corresponding relation between the gray scale and the brightness of the panel and the actual mura state of each area of the panel;
and step 30, combining the mura compensation data matrixes of each area of the panel to obtain a mura compensation data matrix corresponding to the whole panel, and selecting corresponding mura compensation data according to the set compensation data reference value position.
Wherein the method further comprises:
step S40, obtaining the corresponding relationship between the gray scale and the brightness of the panel in advance.
The pre-obtaining of the corresponding relationship between the gray scale and the brightness of the panel comprises: taking the area of the center of the panel corresponding to the resolution of the industrial camera as a display area, and displaying the rest area of the panel by 0 gray scale;
selecting a panel with a display area without mura, shooting the display of the display area under a specific gray scale by using an industrial camera, and fitting and calculating the corresponding relation between the gray scale and the brightness of the panel according to the brightness of the display area with the highest gray scale and the brightness of the shot display area with each specific gray scale.
Wherein the highest gray scale is 255.
Wherein the specific gray levels include 64, 128 and 192.
Wherein the panel resolution is 8K 4K.
Wherein the industrial camera resolution is 4K 2K.
In step 10, the 8K4K resolution panel is divided into four equal parts to form 4K2K resolution areas at the top left, top right, bottom right and bottom left.
And storing the selected corresponding mura compensation data in a flash memory.
In step 10, when the panel cannot be equally divided into regions according to the resolution of the industrial camera, the adjacent regions of the panel are allowed to overlap.
In summary, the mura processing method for the ultra-high resolution panel reasonably utilizes the industrial camera specification of the existing mura compensation system, realizes the accurate mura compensation of the ultra-high resolution panel, and reduces the high cost brought by the specification replacement of the industrial camera in the mura compensation system.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
In the drawings, there is shown in the drawings,
FIG. 1A is a block diagram of a conventional device for compensating for uneven brightness;
FIG. 1B is a diagram of the original luminance and dark non-uniformity compensation data of the panel;
FIG. 2 is a schematic diagram of a photosensitive element of a camera corresponding to a pixel on a panel;
FIG. 3 is a schematic view of a gamma curve of a panel obtained by the mura processing method for an ultra-high resolution panel according to a preferred embodiment of the present invention;
FIG. 4 is a schematic view of gamma curves of a panel in a preferred embodiment of the mura processing method for an ultra-high resolution panel according to the present invention;
FIG. 5 is a schematic view of a mura processing procedure in a preferred embodiment of the mura processing method for an ultra-high resolution panel according to the present invention;
FIG. 6 is a flow chart of a mura processing method for an ultra-high resolution panel according to the present invention.
Detailed Description
Referring to fig. 6, it is a flow chart of the mura processing method for the ultra-high resolution panel according to the present invention. The method mainly comprises the following steps:
step 10, shooting the actual mura state of the whole panel in different areas by using an industrial camera according to the resolution of the industrial camera, and displaying 0 gray scale in the rest areas of the panel when the gray scale of a certain area of the shot panel is displayed;
taking an industrial camera supporting only a 4K2K resolution (3840 × 2160 pixel) panel to photograph an 8K4K resolution (7680 × 4320 pixel) panel as an example, a 4K2K resolution area is displayed only in the center area of the 8K4K resolution panel, and the rest 3/4 areas are all displayed as a black screen (0 gray scale);
step 20, respectively obtaining a mura compensation data matrix of each area of the panel according to the pre-obtained corresponding relation between the gray scale and the brightness of the panel and the actual mura state of each area of the panel;
fitting and calculating a gamma curve (one-to-one correspondence between gray scale and brightness) of the 8K4K resolution panel in advance; dividing a panel with 8K4K resolution into four equal parts to form 4 display areas with 4K2K resolution, wherein when one area has gray scale display, the other three areas all display black pictures (0 gray scale); shooting the set gray scale mura states of 4K2K resolution display areas respectively, calculating the central brightness value of each set gray scale according to the central brightness of the highest gray scale and a gamma curve obtained by fitting, and calculating the mura compensation data matrix A, B, C, D of each 4K2K resolution display area in a contrast manner;
step 30, combining the mura compensation data matrixes of each area of the panel to obtain a mura compensation data matrix corresponding to the whole panel, and selecting corresponding mura compensation data according to the set compensation data reference value position;
and combining the mura compensation data matrixes A, B, C, D, selecting corresponding mura compensation data according to the set compensation data reference value position, and storing the corresponding mura compensation data in a flash memory to complete the mura processing of the 8K4K resolution panel.
The method comprises the steps of shooting actual mura states of the high-resolution display panel in different areas, calculating compensation gray scales, combining the compensation gray scale data matrixes of the areas, and selecting corresponding mura compensation data according to the set compensation gray scale data reference value position to realize mura compensation of the high-resolution display panel. In step 10, when the panel cannot be partitioned according to the resolution of the industrial camera, the adjacent regions of the panel are allowed to overlap, and repeated data can be eliminated when the compensation data matrix is subsequently combined.
The present invention will be described below by taking as an example the actual mura requirement of an industrial camera supporting only a 4K2K resolution (3840 × 2160 pixels) panel to capture an 8K4K resolution (7680 × 4320 pixels) panel.
Firstly, obtaining a corresponding relation between a gray scale and a brightness of a panel in advance, specifically comprising:
a. fig. 3 is a schematic diagram illustrating a process of obtaining a gamma curve of a panel according to a preferred embodiment of the mura processing method for an ultra-high resolution panel of the present invention. The center of the 8K4K resolution panel is taken as the center, the area with the resolution of 4K2K is displayed only in the center area of the panel, and the rest 3/4 area is displayed by a black picture (0 gray scale);
b. fig. 4 is a schematic gamma curve diagram of a panel according to a preferred embodiment of the mura processing method for an ultra-high resolution panel of the present invention. And (3) shooting a plurality of specific gray scales (non-mura shooting set gray scales) in the step (a) by using the existing industrial camera, and fitting and calculating a gamma curve (one-to-one correspondence relationship between the gray scales and the brightness) of the 8K4K resolution panel according to the brightness of the central area of the highest gray scale (255 gray scales) and the central brightness of each shot gray scale.
Wherein the specific gray levels include 64, 128 and 192.
Mura compensation data are next acquired:
c. FIG. 5 is a schematic view of a mura processing procedure in a preferred embodiment of the mura processing method for an ultra-high resolution panel according to the present invention; dividing a panel with 8K4K resolution into four equal parts to form 4 display areas with 4K2K resolutions of upper left, upper right, lower right and lower left, wherein when one area has gray scale display, the rest three areas all display black pictures (0 gray scale);
d. respectively shooting the set gray scale mura states of 4K2K resolution display areas in the step c, calculating the central brightness value of each set gray scale according to the central brightness of the highest gray scale and a gamma curve obtained by fitting, and calculating the mura compensation data matrix A, B, C, D of each 4K2K resolution display area in a contrast manner;
e. and combining the mura compensation data matrixes A, B, C, D, selecting corresponding mura compensation data according to the set compensation data reference value position, and storing the corresponding mura compensation data in a flash memory to complete the mura processing of the 8K4K resolution panel.
The invention aims at the ultrahigh resolution panel, carries out the shooting of the actual mura state in different areas and calculates the compensation value, and then combines and processes the compensation data of each area to realize the mura compensation of the whole area of the ultrahigh resolution panel. For higher resolution panels, mura processing can be implemented similarly.
In summary, the mura processing method for the ultra-high resolution panel reasonably utilizes the industrial camera specification of the existing mura compensation system, realizes the accurate mura compensation of the ultra-high resolution panel, and reduces the high cost brought by the specification replacement of the industrial camera in the mura compensation system.
As described above, it will be apparent to those skilled in the art that various other changes and modifications can be made based on the technical solution and the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the appended claims.
Claims (10)
1. A mura processing method for an ultra-high resolution panel, comprising:
step 10, shooting the actual mura state of the whole panel in different areas by using an industrial camera according to the resolution of the industrial camera, and displaying 0 gray scale in the rest areas of the panel when the gray scale of a certain area of the shot panel is displayed;
step 20, respectively obtaining a mura compensation data matrix of each area of the panel according to the pre-obtained corresponding relation between the gray scale and the brightness of the panel and the actual mura state of each area of the panel;
step 30, combining the mura compensation data matrixes of each area of the panel to obtain a mura compensation data matrix corresponding to the whole panel, and selecting corresponding mura compensation data according to the set compensation data reference value position;
the industrial camera resolution is less than the panel resolution.
2. The mura processing method for an ultra-high resolution panel as recited in claim 1, further comprising:
and step 40, obtaining the corresponding relation between the gray scale and the brightness of the panel in advance.
3. The mura processing method for an ultra-high resolution panel as recited in claim 2, wherein said obtaining gray scale to luminance correspondence of the panel in advance comprises:
taking the area of the center of the panel corresponding to the resolution of the industrial camera as a display area, and displaying the rest area of the panel by 0 gray scale;
selecting a panel with a display area without mura, shooting the display of the display area under a specific gray scale by using an industrial camera, and fitting and calculating the corresponding relation between the gray scale and the brightness of the panel according to the brightness of the display area with the highest gray scale and the brightness of the shot display area with each specific gray scale.
4. The mura processing method for an ultra-high resolution panel as recited in claim 3, wherein the highest gray scale is 255.
5. The mura processing method for an ultra-high resolution panel as recited in claim 3, wherein said specific gray levels include 64, 128 and 192.
6. The mura processing method for an ultra-high resolution panel as recited in claim 1, wherein the panel resolution is 8K 4K.
7. The mura processing method for an ultra-high resolution panel according to claim 6, wherein the industrial camera resolution is 4K 2K.
8. The mura processing method for an ultra-high resolution panel as claimed in claim 7, wherein the panel of 8K4K resolution is divided into four equal parts in step 10 to form 4 regions of 4K2K resolution at upper left, upper right, lower right and lower left.
9. The mura processing method for an ultra-high resolution panel as recited in claim 1, wherein said selected corresponding mura compensation data is stored in a flash memory.
10. The mura processing method for an ultra-high resolution panel as claimed in claim 1, wherein in the step 10, when the panel cannot be equally divided into regions according to the resolution of the industrial camera, overlapping between adjacent regions of the panel is allowed.
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| CN107945727B (en) * | 2017-11-23 | 2020-06-05 | 深圳市华星光电半导体显示技术有限公司 | Mura phenomenon compensation method and device |
| CN107863080A (en) * | 2017-11-29 | 2018-03-30 | 深圳市华星光电技术有限公司 | A kind of LCDs mura compensation methodes |
| CN109946858B (en) * | 2017-12-20 | 2022-03-11 | 咸阳彩虹光电科技有限公司 | Mura defect detection method and device |
| CN108281120B (en) * | 2018-01-27 | 2020-04-10 | 深圳市华星光电半导体显示技术有限公司 | Mura repairing method of display panel |
| CN108694912B (en) * | 2018-05-03 | 2019-07-02 | 深圳市华星光电技术有限公司 | The method for eliminating backlight Mura |
| CN108831393B (en) * | 2018-06-27 | 2020-12-22 | 深圳市华星光电半导体显示技术有限公司 | Mura compensation optimization method and system for liquid crystal display panel |
| CN111124344B (en) * | 2018-11-01 | 2024-03-12 | 合肥欣奕华智能机器股份有限公司 | Screen particle brightness extraction method and device |
| CN110148375B (en) * | 2019-06-28 | 2022-07-19 | 云谷（固安）科技有限公司 | Mura compensation method and device of display panel |
| CN110428762B (en) * | 2019-07-10 | 2023-05-16 | 武汉精立电子技术有限公司 | OLED panel aging test luminescence characteristic detection method based on pixel brightness |
| CN112304421B (en) * | 2019-07-26 | 2022-03-11 | 深圳Tcl数字技术有限公司 | Processing method of gray scale intensity data, storage medium and terminal equipment |
| CN110956639B (en) * | 2019-12-17 | 2023-08-29 | 易诚高科（大连）科技有限公司 | Analysis method for OLED screen pixel acquisition |
| CN115116381A (en) * | 2021-03-19 | 2022-09-27 | 北京芯海视界三维科技有限公司 | Optical compensation method and device of light-emitting device and compensation equipment |
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| JP3431075B2 (en) * | 2001-08-27 | 2003-07-28 | 科学技術振興事業団 | Liquid crystal display panel unevenness classification processing method, apparatus and program |
| KR101374989B1 (en) * | 2006-12-27 | 2014-03-17 | 엘지디스플레이 주식회사 | Mura detecting device and method driving of the same |
| CN103198801B (en) * | 2013-03-11 | 2015-02-04 | 深圳市华星光电技术有限公司 | Compensation method for flat display panel large-viewing-angle Mura area |
| CN103558229B (en) * | 2013-11-25 | 2016-03-30 | 苏州富鑫林光电科技有限公司 | A kind of MURA vision automatic testing method of TFT-LCD processing procedure and device |
| CN105158942B (en) * | 2015-09-24 | 2018-07-06 | 昆山龙腾光电有限公司 | A kind of Mura automatic testing methods and system |
| CN105206239B (en) * | 2015-10-16 | 2018-03-30 | 深圳市华星光电技术有限公司 | Mura phenomenon compensation methodes |
| CN106646939B (en) * | 2016-11-17 | 2019-11-19 | 南京华东电子信息科技股份有限公司 | A kind of Mura defects method for detecting |
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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. |