Liquid crystal display brightness control method and device, and liquid crystal display equipment
A technology of brightness control and liquid crystal display, which is applied to static indicators, cathode ray tube indicators, instruments, etc., and can solve the problem of limited space for image contrast effect improvement
Active Publication Date: 2015-12-09
HISENSE VISUAL TECH CO LTD
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[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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[0027] 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.
[0028] 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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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 the gray value of an image in a partitioned image data block according to a received image signal and a preset rule, and extracting the backlight value of a partitioned region corresponding to the partitioned image data according to the gray value of the image; obtaining a gain backlight value of the backlight partitioned region according to the product of a preset backlight value gain coefficient with a pre-extracted partitioned region backlight value if the backlight value of the partitioned region is determined to be greater than a second threshold value; enabling the gain backlight value to be mapped to a backlight source driving circuit in a corresponding backlight partitioned region, so as to drive and control the backlight source brightness of the corresponding backlight partitioned region, wherein the preset backlight value gain coefficient is greater than one; carrying out the gray value compensation of the gray value of each image pixel in the partitioned image data block according to the preset backlight value gain coefficient if the partitioned region backlight value is determined to be less than a third threshold value, so as to obtain compensation image data for driving a liquid crystal panel, wherein the compensation coefficient is greater than one. The method improves the contrast and quality of a liquid crystal 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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Login to View More IPC IPC(8): G09G3/34G09G3/36G09G5/10
CPCG09G3/3426G09G2320/064G09G2360/16
Inventor 张玉欣黄顺明宋志成
Owner HISENSE VISUAL TECH CO LTD