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 picture
Active Publication Date: 2015-12-23
HISENSE VISUAL TECH CO LTD
View PDF4 Cites 24 Cited by
- 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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] 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.
[0024]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 ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More 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; if determining that the subregion backlight value is larger than a second threshold value, multiplying preset backlight valve gain coefficient with the pre-extracted subregion backlight values to obtain gain backlight values of the backlight subregions, and mapping each gain backlight value 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, wherein the preset backlight valve gain coefficient is larger than 1; and if determining that the subregion backlight value is larger than a third threshold value, carrying out gray scale compensation on the gray scale values of image pixel points in the subregion image data blocks according to a preset compensation coefficient respectively to obtain compensated image data for driving a liquid crystal panel, wherein the compensation coefficient is larger than 1. 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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G09G3/36
CPCG09G3/3426G09G2320/064G09G2320/0646G09G2360/16
Inventor 张玉欣黄顺明宋志成
Owner HISENSE VISUAL TECH CO LTD