AMOLED screen GAMMA correction method and system

Abstract

The invention discloses an AMOLED screen GAMMA correction method and system, and relates to the technical field of AMOLED display. The method comprises the steps: calculating an initial target tristimulus value of each gray scale; measuring an actual tristimulus value under the setting of the initial voltage, and fitting a conversion curve; calculating target voltage setting according to the target tristimulus value and the conversion curve; measuring the actual tristimulus value of each gray scale under the setting of the target voltage; judging whether an error between the actual tristimulusvalue and the initial target tristimulus value is smaller than a precision requirement or not; if requirements are met, outputting the current target voltage setting as a correction result; if not, correcting the target tristimulus value of each gray scale according to the error with the initial target tristimulus value, and recalculating the target voltage setting until the precision requirementis met. According to the method, the problem that the luminance of the AMOLED display cannot be accurately estimated due to ELVDD voltage drop can be effectively solved, and the voltage setting conforming to the GAMMA luminance characteristic can be rapidly and accurately obtained in an iterative mode.

Description

technical field [0001] The invention relates to the technical field of AMOLED display technology, in particular to an AMOLED screen GAMMA correction method and system. Background technique [0002] GAMMA calibration measures the display characteristics of the screen to construct the target voltage setting for each gray scale, so that the display characteristics of each gray scale conform to the expected GAMMA curve. Due to differences in electrical parameters such as threshold voltage and mobility and the severity of the IRDrop phenomenon caused by ELVDD voltage changes on AMOLED screens, the original GAMMA characteristics of different screens will not be exactly the same. In order to make the display characteristics of different screens conform to the standard GAMMA curve, GAMMA calibration is a necessary process in the mass production of AMOLED screens. [0003] Considering the influence of the IR drop phenomenon caused by the unique ELVDD voltage change of the AMOLED scr...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides an AMOLED screen GAMMA correction method and system, which solves the problem that the traditional AMOLED screen GAMMA correction method is often time-consuming and labor-intensive, requiring a large amount of data to be measured to find the closest target voltage setting , high precision but takes a long time, which greatly affects the mass production efficiency

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