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

A technology of liquid crystal display and brightness control, applied in static indicators, instruments, etc., to solve problems such as limited space for improving the contrast effect of the screen

Active Publication Date: 2015-12-23
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • 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 device
  • Liquid crystal display brightness control method and device and liquid crystal display device
  • Liquid crystal display brightness control method and device and liquid crystal display device

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no. 1 approach

[0056] 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:

[0057] S401. Obtain an average gray scale value of the global image according to the gray scale value of the image.

[0058] 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...

specific Embodiment approach

[0086] In the second embodiment, the method of increasing the adjustment coefficient is adopted to lower the brightness of the backlight in the area of ​​the low-brightness picture. For the first specific implementation of obtaining the backlight gain coefficient, the second specific implementation of the adjustment coefficient acquisition includes:

[0087] Before step S50 of Embodiment 1, the liquid crystal display brightness control method further includes:

[0088] S410. Obtain the backlight value adjustment coefficient of the partition, multiply the gain partition backlight value of the partition by the corresponding backlight value adjustment coefficient to obtain the partition backlight value, wherein, when the partition backlight value is smaller than the first threshold, the backlight value adjustment The coefficient is less than 1.

[0089] Specifically, in the second embodiment, the backlight value adjustment coefficient look-up table is pre-stored, and the backligh...

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Abstract

The invention provides a liquid crystal display brightness control method and device and a liquid crystal display device, and belongs to the technical field of liquid crystal display. The method comprises the following steps: determining image gray scale values of subregion image data blocks according to preset rules and according to received image signals, and pre-extracting subregion backlight values corresponding to subregion image data according to the image gray scale values; multiplying preset backlight valve gain coefficient with pre-extracted subregion backlight values to obtain subregion backlight values of the backlight subregions after gain, wherein the preset backlight valve gain coefficient is larger than 1; and mapping each subregion backlight value after gain to a drive circuit of a backlight source of the corresponding backlight subregion so as to drive and control the brightness of the backlight source of the corresponding backlight subregion. Therefore, contrast quality effect of liquid crystal display frame is improved.

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): G09G3/36
CPCG09G3/3426G09G3/3648G09G2320/0238G09G2320/0285G09G2320/064G09G2320/0646G09G2320/066G09G2330/021G09G2360/16
Inventor 张玉欣黄顺明宋志成
Owner HISENSE VISUAL TECH CO LTD
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