Liquid crystal display television image quality adjustment method based on RGB three-primary-color LED backlight

Abstract

The invention relates to a liquid crystal display television display technology and solves the problem that brightness variation is caused by existing liquid crystal display television color temperature adjustment. The technical scheme is summarized as follows: after a target color temperature value and a target brightness value are set, an output image is analyzed, an image backlight color temperature is obtained, then RGB three-primary-color luminous flux corresponding to the color temperature is matched by utilizing a color mixture database based on an RGB three-primary-color mixture algorithm, then obtaining drive currents for RGB three primary colors according to a changing curve between the luminous flux and the drive currents, respectively driving a red light chip, a green light chip and a blue light chip of the LED backlight to obtain the target color temperature, and adjusting the drive currents for the RGB three primary colors for achieving the target brightness value under the condition that the ratio of the RGB three-primary-color luminous flux is maintained to be constant. The method provided by the invention has the beneficial effects that brightness does not change after the color temperature is adjusted, and color temperature consistency of different televisions is good by virtue of white balance adjustment. The method provided by the invention is especially applicable to a liquid crystal display television based on an RGB three-primary-color LED backlight.

Description

technical field [0001] The invention relates to liquid crystal television display technology, in particular to liquid crystal television image quality adjustment technology. Background technique [0002] With the development of existing LED backlight and packaging technology, the three chips of red light, green light and blue light with mature technology are packaged in the same bracket body, and they are applied to LCD TVs to achieve ultra-high color gamut coverage and better colors. display effect. Brightness and color temperature are the two most important indicators of optical performance indicators, and they are related to a certain extent. Under any backlight, adjusting the color temperature of LCD TVs will have an impact on brightness. The color temperature adjustment of existing LCD TVs is mainly realized by adjusting the signal amplitude. When adjusting the color temperature, it will cause changes in brightness, and the color temperature standards of different LCD ...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of brightness change caused by color temperature adjustment of existing LCD TVs