Method and device for correcting gamma value of LCD screen

Abstract

The invention relates to a method and a device for correcting gamma values of an LCD screen. The method comprises setting different working state values of the LCD screen; sampling the gamma values representing LCD screen display effect and corresponding to the different working state values of the LCD screen to obtain sampled gamma values; fitting the sampled gamma values with a standard gamma curve to obtain the fit gamma values most compliant with the standard gamma curve; saving the corresponding working state values of the LCD screen corresponding to the fit gamma values; according to the corresponding relation between the preset fit gamma values and the LCD screen working state values, and reading the corresponding working state values of the LCD screen corresponding to the fit gamma values and adjusting the working state value of the current LCD screen. Since the device adopts the method of respectively adjusting the gamma values of RGB three colors (i.e. red, green and blue) of the LCD screen, the invention has the advantages that the display effect of the LCD screen is improved and the maintenance cost caused by customer return or repair because of poor LCD screen displayeffect is reduced.

Description

technical field [0001] The invention relates to the field of LCD screen display, in particular to a method and device for correcting the gamma value of the LCD screen. Background technique [0002] LCD (Liquid Crystal Display, liquid crystal display) screens are widely used in many fields that require display, such as mobile phones, computers, televisions, and cameras. The purpose of adjusting the display effect of the LCD screen is usually achieved by adjusting the gamma value (gamma factor) of the LCD screen. [0003] At present, the main defects of LCD screens commonly used in mobile communication terminal products are: poor display effect, mainly reflected in reddish or bluish color cast or color difference on the screen; poor color contrast. The main reason for the above defects is that the currently used LCD screen can only control the gamma value of the LCD screen by adjusting the brightness of the white backlight, so as to balance the brightness, chromaticity and co...

AI Technical Summary

Problems solved by technology

[0003] At present, the main defects of LCD screens commonly used in mobile communication terminal products are: poor display effect, mainly reflected in the reddish or bluish color cast or color difference of the screen; poor color contrast

The main reason for the above defects is that the currently used LCD screen can only control the gamma value of the LCD screen by adjusting the brightness of the white backlight, so as to balance the brightness, chromaticity and contrast of the LCD screen, and this method cannot separately control the LCD screen. The gamma values ​​of the three colors of RGB (red, green, and blue) cause problems of color cast and color difference

At the same time, controlling the gamma value of the LCD screen by adjusting the brightness of the white backlight is only a one-time adjustment at the factory, which cannot deal with problems such as color shift or color difference caused by performance degradation due to device aging

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