Backlight brightness control method, backlight brightness control device and display terminal

Abstract

The invention provides a backlight brightness control method, a backlight brightness control device and a display terminal. The backlight brightness control method provided by the invention includes the following steps that: brightness information of pixel points of a current image is acquired; the global brightness information of the image and the regional brightness information of subregions of the image are acquired respectively; the backlight brightness control value of each subregion is obtained according to the global brightness information and the regional brightness information of each subregion; and the backlight brightness of the image is controlled according to the backlight brightness control value of each subregion. With the backlight brightness control method, the backlight brightness control device and the display terminal of the invention adopted, the backlight brightness of the current image can be dynamically adjusted according to the global brightness information of the image and the regional brightness information of each subregion of the image, and therefore, high dynamic contrast and color saturation can be realized, and at the same time, phenomena of image flicker and uneven brightness when low gray-scale images appear can be avoided.

Description

technical field [0001] The invention relates to the field of image display, in particular to a backlight brightness control method, a backlight brightness control device and a display terminal. Background technique [0002] A liquid crystal display is usually composed of a liquid crystal panel and a backlight unit. The backlight unit emits constant and uniform light and transmits it to the liquid crystal panel. The liquid crystal panel then adjusts the light transmittance of the pixels to display different images. [0003] Because the image displayed by the liquid crystal panel has light and dark changes, if the backlight unit always emits light at the same brightness, the saturation and contrast of the picture will be reduced due to the light leakage of the liquid crystal panel, which will affect the display effect. Therefore, dynamic backlight control technology can now be used to adjust the brightness of the backlight unit according to the image content displayed on the d...

AI Technical Summary

Problems solved by technology

[0004] However, when dynamically adjusting and controlling the brightness of a low-gray-scale image, the brightness of the screen in a certain area may be significantly different from the brightness of other areas due to the different backgrounds of the screen in different areas, and when the background of the screen moves , and there will be regional brightness changes, which will cause obvious flickering and jittering in the image screen

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