Method for controlling gray scales, gray scale control device and liquid crystal display

Abstract

The embodiment of the invention provides a method for controlling gray scales, a gray scale control device and a liquid crystal display (LCD). The LCD comprises a plurality of pixels. The method comprises the following steps: acquiring luminance (L0) of the pixels at the end time of a current frame; according to the luminance (L0) at the end time of the current frame, acquiring drive gray scales of the pixels at a target frame, wherein the target frame is the next frame of the current frame; and outputting the drive gray scales out of the target frame, wherein the drive gray scales enable actual luminance of the pixels at the target frame to be equal to target luminance (L1) of the target frame and the target luminance (L1) can reach an expected value of human eyes, and the actual luminance is the luminance generated by integration of gray scale response time curves corresponding to the drive gray scales to times. Within the time of one frame, the gray scales are integrated to obtain the actual luminance of the target frame. Because the feeling of the human eyes for lights during a period is an average effect during the period, namely, the expected value of the human eyes, the actual luminance generated by adjusted drive gray scales can reach the expected value of the human eyes, thus being capable of eliminating smearing happening in the process of switching pictures.

Description

technical field [0001] The present invention relates to display technology, in particular to a gray scale control method, a gray scale control device and a liquid crystal display. Background technique [0002] During the display process of a liquid crystal display (LCD, Liquid Crystal Display), the gray scale represents the level of different brightness levels from the darkest to the brightest. The more levels in the middle, the more delicate the picture effect that can be presented. The slow response of liquid crystals will cause smearing of fast-moving objects. This is because the response of liquid crystals is not complete during the grayscale conversion process, resulting in the actual grayscale being different from the target grayscale. The response time period of liquid crystal displays is usually long, so in the process of displaying images—especially dynamic images, if the response time period for screen switching is too long, the gray scale flip will not be complete...

AI Technical Summary

Problems solved by technology

[0004] The existing technology has the following problems: by increasing the refresh rate of the LCD to achieve accurate image color, the smear cannot be completely eliminated, and the color will also be inaccurate. For example, smear or dynamic color inaccuracy will appear when the screen is displayed

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