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: 2018-06-12
HISENSE VISUAL TECH CO LTD
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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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An apparatus for controlling liquid crystal display brightness includes: a zone image grayscale determining section configured to determine grayscale values of pixels in a zone image data block under a predetermined rule according to a received image signal; a zone backlight value pre-obtaining section configured to pre-obtain a zone backlight value corresponding to the zone image data block according to the grayscale values; a zone backlight value gain section configured, when it is determined that the zone backlight value is above a first threshold, to multiply the zone backlight value with a backlight value gain coefficient to obtain a backlight value to which a gain is applied, corresponding to the zone image data block, and to output the backlight value to which the gain is applied, to a driver circuit of backlight source in a backlight zone corresponding to the zone image data block, to control brightness of the backlight source in the corresponding backlight zone as a result of driving, where the backlight value gain coefficient is more than 1; and a zone image grayscale compensating section configured, when it is determined that the zone backlight value is below a second threshold, to compensate for the grayscale values of pixels in the zone image data block using compensation coefficients respectively to obtain compensated image data for driving the liquid crystal panel, wherein the compensation coefficient is more than 1.
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...
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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