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

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

Active Publication Date: 2017-11-24
HISENSE VISUAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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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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Embodiment Construction

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0034] In order to improve the image quality effect of the dynamic contrast ratio of the liquid crystal display device, the partition dynamic backlight modulation technology is adopted, and the entire backlight matrix is ​​divided into multiple backlight partitions in the row direction and the column direction, and the backlight sources contained in each backlight partition can be The brightness is driven and controlled independently. It should be noted that, ideally, each backlight partition can illuminate its backlight area independently, but in practice, the brightness of adjacent backlights will have a certain impact. Collect the image gray scale brightness...

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Abstract

An apparatus for controlling liquid crystal display brightness includes: a subarea image grayscale determining section configured to determine image grayscale values of subarea image data blocks corresponding to backlight subareas according to a received image signal; a subarea backlight value pre-obtaining section configured to pre-obtain subarea backlight values corresponding to the subarea image data blocks according to the image grayscale values of the subarea image data blocks; a subarea backlight value gain section configured to multiply the pre-obtained subarea backlight values with a preset backlight value gain coefficient to obtain gained backlight values of the backlight subareas, wherein the preset backlight value gain coefficient is more than 1; and a subarea backlight value outputting section configured to output the respective gained subarea backlight values to driver circuits of backlight sources in the corresponding backlight subareas to control the brightness of the backlight sources in the corresponding backlight subareas as a result of driving.

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 Patents(China)
IPC IPC(8): G09G3/34G09G5/10
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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