Mura phenomenon compensation method

Abstract

The invention provides a Mura phenomenon compensation method. An LCD display panel is divided into multiple display subareas comprising M rows and N columns of pixel points, pixel points at the first row and the first column and pixel points at the (M / 2+1)th row and the (N / 2+1)th column are selected respectively in each display subarea to serve as first pre-selected pixel points and second pre-selected pixel points; according to gray compensation values of four nearest first pre-selected pixel points around the position where a solved pixel point is and gray compensation values of the second pre-selected pixel points in the display subarea where the solved pixel point is, the gray compensation value of the solved pixel point in the display subarea is calculated. Through the gray compensation values of the second pre-selected pixel points, whether tiny Mura exists in the display subareas can be accurately judged, better compensation effects can be provided for tiny Mura falling in the display subareas, that is, compressed pixel areas, Mura compensation effects are ensured while consumption of hardware storage space is reduced, the product quality is enhanced, and the operation is simple and quick.

Description

Technical field [0001] The present invention relates to the field of display technology, and in particular to a Mura phenomenon compensation method. Background technique [0002] With the development of Liquid Crystal Display (LCD) towards lighter, thinner and larger, due to some uncontrollable factors in the actual manufacturing process, there are differences in the physical characteristics of the LCD display panel, resulting in more than one pixel. Within the range of, the phenomenon of uneven brightness when displaying pure grayscale images, which is called the Mura phenomenon in the industry. [0003] The Mura phenomenon has become a bottleneck restricting the development of LCD. The probability of occurrence of Mura phenomenon can be reduced by improving the process level or improving the purity of raw materials. For the LCD panel that has been manufactured, its physical characteristics have been finalized. In order to compensate for the Mura phenomenon caused by the defects...

AI Technical Summary

Problems solved by technology

[0006] If the compensation values ​​of the four vertices with Mura compensation values ​​A, B, C, and D have little difference (the mutual difference is less than 1 gray value), then the difference in the compensation data calculated in the entire 8×8 pixel area is very small , that is, there is no significant difference in brightness and darkness compensation in this area; image 3 As shown, if there is actually a small mura and it is just inside the 8×8 pixel area, after the compensation is calculated according to the values ​​of A, B, C, and D, the difference between the position of the mura and the surrounding light and darkness still exists, and no effective compensation is obtained.

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