P-GAMMA automatic adjusting method and device based on large and medium-size modules

Abstract

The invention discloses a P-GAMMA automatic adjusting method and an automatic adjusting device based on large and medium-size modules. The method comprises the following steps: configuring Flicker parameters and P-Gamma adjusting parameters; configuring each binding point of the modules as well as corresponding register addresses; adjusting a VCOM register until searching out a VCOM value corresponding to the minimum Flicker value; sequentially adjusting Gamma adjusting on each binding point of the modules, in a Gamma adjusting process, adjusting corresponding positive voltage value V+ and negative voltage value V- corresponding to the binding point under a precondition of keeping symmetry of positive pressure and negative pressure, and implementing in a circulating mode until bright values of the modules are within a target brightness error range; implementing backward reading and verifying; and implementing OTP burning. The device comprises a PC, an adjusting PG, a picture check PG,an optical measuring instrument and modules. According to the method and device provided by the invention, a passing rate of quantitative grayscale brightness is guaranteed, namely brightness meets apassing rate of 255 greyscale brightness of a Gamma2.2 curve and under a condition that errors are within 0.2. Based upon experimental results, it is indicated that the device has the characteristicsof being high in adjusting speed and high in brightness passing rate.

Description

technical field [0001] The invention relates to the field of display and testing of liquid crystal modules, in particular to a P-GAMMA automatic adjustment method and device based on medium and large size modules. Background technique [0002] During the production process of medium and large size LVDS and VBYONE modules, the factory often needs to adjust the flicker, white balance and gamma curve of the module in order to better restore the color and improve the image quality. Due to the differences between different modules, if all the modules use the same adjustment data, it is easy to produce flicker, color cast, and affect the image quality. [0003] At present, the adjustment method adopted by the industry is: (1) Engineers manually adjust a set of empirical data on the sample module, and then burn it into all modules during the production process. Due to actual differences, some screens are prone to flicker and color cast; (2) Adjust each screen. However, due to the...

AI Technical Summary

Problems solved by technology

In this way, the Flicker of the module can be adjusted very well, but because Gamma uses fixed data, due to the actual difference of the screen itself, some screens still have image quality problems such as color cast

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