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Mura phenomenon compensation method and device thereof

a phenomenon compensation and phenomenon technology, applied in the field of display technologies, can solve problems such as errors in the compensation effect of each timer control integrated circui

Active Publication Date: 2021-06-24
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent is about a method and device to compensate for a visual defect in a display panel, called "Mura". The method can accurately compensate for the defect when multiple timer control integrated circuits are used in parallel. This improves the overall quality of the display.

Problems solved by technology

When a plurality of timer control integrated circuits are used in parallel to drive the display panel, there are some problems when using a compensation technology for brightness differences of the display panel.
When the camera transmits the grayscale compensation data matrix to the parallel timer control integrated circuits at a same time, because one timer control integrated circuit is only responsible for data in one of the display areas of the display panel, the timer control integrated circuits cannot distinguish effective compensation data matrices corresponding to their responsible areas, causing errors in compensation effect of each timer control integrated circuit.

Method used

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  • Mura phenomenon compensation method and device thereof

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Experimental program
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Effect test

first embodiment

[0025]As shown in FIGS. 1 and 2, a Mura phenomenon compensation method provided by the present disclosure is used in a display panel processed by a plurality of parallel timer control integrated circuits (TCON IC). The display panel in the embodiment of the present disclosure is an LCD. The Mura phenomenon compensation method comprises following steps:

[0026]step one: taking an image of entire display areas of the display panel. Specifically, the display panel that displays a certain grayscale image is taken a picture by a camera above a center point of the display panel, and brightness data of the display panel is obtained by captured images.

[0027]Step two: calculating a compensation data matrix a of the entire display areas of the display panel according to the collected brightness data. Specifically, a Mura phenomenon compensation processing chip is configured to be connected to the timer control integrated circuits and to calculate the compensation data matrix a of the entire dis...

second embodiment

[0032]Referring to FIG. 3, the Mura phenomenon compensation method of the present disclosure sets N of the timer control integrated circuits to be equal to 2, that is, there are a timer control integrated circuit 1 (TCON1) and a timer control integrated circuit 2 (TCON2). The resolution of the display panel is set to be 7680*4320, and reference points set at intervals are 16*16, the compensation data matrix a is 481*271, the reference points corresponding to both of the small parts are integers, and each of the small matrices C is 481*136. When dividing the compensation data matrix a of 481*271 into an upper small matrix and a lower small matrix, the compensation data of a 136th row of the compensation data matrix a is copied.

[0033]Specifically, the reference points of the compensation data corresponding to an upper part and a lower part of the display areas in the embodiment are integers. A first row of pixels in the lower part is a position of a reference point of the compensation...

third embodiment

[0034]Referring to FIGS. 4 and 5, the Mura phenomenon compensation method of the present disclosure sets N of the timer control integrated circuits to be equal to 2, that is, there are a timer control integrated circuit 1 (TCON1) and a timer control integrated circuit 2 (TCON2). The resolution of the display panel is set to be 7680*4320, and the reference points set at intervals are 32*32, the compensation data matrix a is 241*136, the reference points corresponding to the display areas of both of the small parts are not integers, and each of the small matrices C is 241*69. When dividing the compensation data matrix a of 241*136 into an upper small matrix and a lower small matrix, the compensation data in a 68th row and a 69th row of the compensation data matrix a is copied.

[0035]Specifically, the reference points of the compensation data corresponding to an upper part and a lower part of the display areas are not integers. The resolution is 7680*4320, the compensation reference poi...

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Abstract

A Mura phenomenon compensation method and a device thereof are provided. By dividing compensation data of all areas of a display panel into areas for which corresponding timer control integrated circuits are responsible and storing them in different positions in a storage area of a flash memory respectively, each of the timer control integrated circuits only reads its corresponding part of the compensation data during operation, which prevents a problem that a plurality of timer control integrated circuits cannot distinguish effective compensation data matrices corresponding to their responsible areas, causing errors in compensation effect of each timer control integrated circuit.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The presentapplication claims priority of the Chinese patent application No. 201711202640.0 filed on Nov. 23, 2017 with the National Intellectual Property Administration, titled “Mura phenomenon compensation method and device thereof”, which is incorporated by reference in the present application in its entirety.FIELD OF INVENTION[0002]The presentdisclosure relates to the field of display technologies, and more particularly, to a Mura phenomenon compensation method and a device thereof.BACKGROUND OF INVENTION[0003]In driving circuits of display panels, data processing ability of timer control integrated circuits (TCON IC) has certain limitations. Taking a timer control integrated circuit having a maximum resolution of 3840*2160 and a refresh rate of 120 Hz as an example, if a display panel having a resolution of 7680*4320 and a refresh rate of 60 Hz is required to be driven, then two timer control integrated circuits are necessary to be u...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G09G3/36
CPCG09G3/36G09G2320/0233G09G3/20G09G3/3208G09G2370/08G09G2310/0221G09G2320/0285
Inventor ZHANG, HUA
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD