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Liquid crystal display brightness control method and device, and liquid crystal display equipment

A technology of liquid crystal display and brightness control, used in static indicators, cathode ray tube indicators, instruments, etc., can solve the problem of limited space for improving the contrast effect of the picture

Active Publication Date: 2015-12-23
HISENSE VISUAL TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a liquid crystal display brightness control method, device and liquid crystal display equipment, which are used to solve the problem of limited space for improving the effect of picture contrast in the prior art

Method used

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  • Liquid crystal display brightness control method and device, and liquid crystal display equipment
  • Liquid crystal display brightness control method and device, and liquid crystal display equipment
  • Liquid crystal display brightness control method and device, and liquid crystal display equipment

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no. 1 approach

[0051] Such as Figure 6a Embodiment 1 of the present invention provides a schematic flow chart of a method of obtaining preset backlight gain coefficients, specifically:

[0052] S401. Obtain an average gray scale value of the global image according to the gray scale value of the image.

[0053] example, such as Figure 5a Embodiment 1 of the present invention provides a schematic diagram of partitioning image data blocks in a display area, combining figure 2 with Figure 5a As shown, according to the division rule of the backlight partition, the display panel is also divided into 144 virtual partitions, the global image displayed at the corresponding position on the display panel is divided into 144 partition image data blocks, and each partition image data block is extracted separately contains the grayscale values ​​of all pixels, and then obtains the average grayscale value through a preset algorithm. Among them, the predetermined algorithm can be the gray scale aver...

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Abstract

The invention provides a liquid crystal display brightness control method and device, and liquid crystal display equipment, and belongs to the technical field of liquid crystal display. The method comprises the steps: determining an image gray scale value of a partitioned image data block according to a received image signal and a preset rule, and pre-extracting a partitioned backlight value corresponding to the partitioned image data block according to the image gray scale value; obtaining a partitioned backlight value of a backlight partitioned region after gain according to the product of a preset backlight value gain coefficient and a pre-extracted partitioned backlight value, wherein the preset backlight value gain coefficient is greater than one; enabling each partitioned backlight value after gain to be mapped to a drive circuit of a backlight source in the corresponding backlight partitioned region, so as to drive and control the brightness of the backlight source of the corresponding backlight partitioned region. The method improves the contrast image quality of a display image.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display, and in particular relates to a liquid crystal display brightness control method and device and liquid crystal display equipment. Background technique [0002] A Liquid Crystal Display (LCD for short) usually uses a dynamic backlight modulation technology to control the brightness of the backlight, which can achieve image quality effects such as energy saving and improved display contrast. Such as figure 1 It is a schematic structural diagram of dynamic backlight modulation technology in liquid crystal display in the prior art. The liquid crystal display device includes an image processing unit that receives an input image signal and acquires backlight data according to the grayscale brightness of the image signal. On the one hand, according to the specifications of the predetermined display panel The format of the image signal is converted and output to the timing controller (TCON...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G5/10G09G3/36
CPCG09G3/3426G09G3/2018G09G2320/0646G09G2320/066G09G2330/021G09G2360/144G09G3/3406G09G3/36G09G2310/08
Inventor 张玉欣黄顺明宋志成
Owner HISENSE VISUAL TECH CO LTD
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