Automatic measurement and correction method and system for LCD GAMMA curve and color temperature

Abstract

The invention provides a GAMMA curvature correction and color-temperature automatic regulating method for liquid crystal display and the system. The said system consists of a system host-machine, a detector, a color analyzer, a video standard signal source, a data interface,and a system measure and correction software, which can perform GAMMA curvature correction and white balance adjustment for multi-purpose TV and computer display including LCD and high-resolution back projection and multi-structure liquid crystal display including TN, STN, DSTN and TFT to improve the videograph display quality of the liquid crystal display. The system host-machine connects multiple video signal sources, automatic measurement and correction software for GAMMA curvature and color-temperature and data interface together, the system parameter can be set manually or automatically, the system configuration is simple, GAMMA curvature correction and white balance adjustment software can be conveniently transferred, and can rapidly finish automatic measurement and correction for GAMMA curvature and color-temperature and can visually inspect the effect. The invention can be used in departments including scientific research, production, quality inspection and maintenance and can visually finish the GAMMA curvature correction and white balance adjustment for the LCD products with high accuracy and quick-speed.

Description

[0001] Field [0002] The patent of the present invention relates to the measurement and correction technology of video display equipment, especially suitable for TVs, computer monitors, TN (twisted nematic), STN ( Super Twisted Nematic), DSTN (Dual Layer Super Twisted Nematic), TFT (Thin Film Transistor) and other liquid crystal displays, used for automatic GAMMA curve and color temperature in the process of production, testing and maintenance of the above products Methods and systems for measurement and calibration. Background technique [0003] At present, liquid crystal displays have a wide range of applications and have entered various fields of society and thousands of households. The types of displays include desktop and notebook computer monitors, industrial electronic screens, desktop TVs, rear projection and plasma TVs, etc. Taking the imaging principle of matrix LCD liquid crystal display as an example, it is based on placing the liquid crystal between two pieces o...

AI Technical Summary

Problems solved by technology

[0007] (1) The human eye evaluates the brightness and color of each gray scale of a liquid crystal display, which is restricted by factors such as the level, experience, and environment of the operator. Manually correcting the GAMMA curve and white balance of the liquid crystal display cannot guarantee the gray scale reproduction and accuracy of the product. The performance of white balance adjustment;

[0008] (2) The system for correcting the grayscale characteristics of liquid crystal displays uses a luminance meter, which cannot measure and correct the GAMMA curves of red, green and blue at the same time. The efficiency of GAMMA correction is low, and the correction effect is poor

[0009] (3) Using the GAMMA correction system without white balance measurement and adjustment function, it is impossible to perform white balance measurement and adjustment after correcting the gray scale characteristics of the liquid crystal display, so it is impossible to further visually test the correction effect of the GAMMA curve;

[0010] (4) With the continuous development of liquid crystal display technology, the GAMMA curve correction system of the prior art requires more specifications of the video signal source, and the hardware system using a separate video signal source is complicated in configuration and not easy to operate

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