A method and system for obtaining correct mura compensation data

Abstract

The invention discloses a correct Mura compensation data obtaining system which comprises first, second and third circuit boards, a switching board and a host computer. The first circuit board is connected to a liquid crystal panel, and provided with a first memory; the third circuit board obtains test grayscale image data from the host computer; the second circuit board is provided with a sequential controller, and the sequential controller is used to receive the test grayscale image data and present Mura compensation data to obtain corrected test image data, and output the corrected test image data to the liquid crystal panel for display; the switching board comprises a CPLD chip module and a second memory which stores the present Mura compensation data temporarily; and the host computeris used to send a command to the switching board and the third circuit board to control online detection of the present Mura compensation data. The invention also discloses a corresponding method. Thus, the present Mura compensation data can be detected online, the detection precision and efficiency can be improved, and the burning frequency of the first memory can be reduced.

Description

technical field [0001] The invention relates to the display field, in particular to a method and system for obtaining correct Mura compensation data. Background technique [0002] Due to defects in the liquid crystal display (Liquid Crystal Display, LCD) manufacturing process, the brightness of the liquid crystal panel (Panel) of the produced liquid crystal display is often uneven, forming various Mura (Mura refers to the uneven brightness of the display, resulting in various trace phenomena). In order to improve the uniformity of the brightness of the LCD panel, the Mura form of 3 to 5 grayscale images (pure white images with different brightnesses) can be photographed by the camera, and the brightness of the surrounding area and the center position can be calculated by comparing the brightness of the center of the panel. difference to obtain Mura compensation data (grayscale data). Wherein, for an area brighter than the central position, the gray scale data is reduced to...

AI Technical Summary

Problems solved by technology

However, in the existing technology, the above-mentioned determination process is generally determined by manual observation, for example, by observing the effect of the compensated panel in pure grayscale (such as grayscale 60) by human eyes, if the brightness is observed Inhomogeneity, it is considered that the current Mura compensation data is incorrect

However, this method of manual judgment is not accurate enough. At the same time, in order to obtain accurate mura compensation data, it is often necessary to replace new mura compensation data for verification, which requires multiple times of burning the memory, which is very inefficient.

Moreover, it is necessary to repeatedly burn the work of the memory, which makes the whole analysis process too complicated

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