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LED display screen picture contrast improving method and device

A LED display and contrast technology, applied in static indicators, instruments, etc., can solve the problems of LED display, such as difficulty in repairing low-gray-scale gray-jumping, high brightness of screen graying, and insufficient gray-scale accuracy, etc., so as to improve the picture Display effect, solve the effect of excessive color bar and uniform color bar transition

Active Publication Date: 2021-08-31
SHENZHEN LIDING PHOTOELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing technology, due to the influence of the characteristics of the light-emitting chip on the LED display screen, the graying brightness of the screen is too high, usually at 0.2cd / m2, which cannot meet customer needs
In addition, due to the insufficient grayscale accuracy of the current LED display screen, it is difficult to repair the low-grayscale grayscale of the LED display screen. After the accuracy, the LED display will have excessively poor color bars, jitter, gray jumping and other phenomena, resulting in poor display effect of the LED display

Method used

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  • LED display screen picture contrast improving method and device
  • LED display screen picture contrast improving method and device

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Embodiment Construction

[0068] The specific implementation manners disclosed by the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0069] figure 1 It is a flow chart of a method for improving the contrast of an LED display screen according to an exemplary embodiment, as shown in figure 1 As shown, the method includes:

[0070] In step 101, the gray value to be displayed of each light point in the i-th frame to be displayed on the LED display screen is obtained.

[0071] For example, as figure 2 As shown, the LED display screen contains a preset number of block areas (blocks), each block area is composed of 4×4 light points, and each block area contains 4 grid areas (grid), each The grid area is composed of 2×2 light points, and the light points in each grid p...

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Abstract

The invention discloses an LED display screen picture contrast improving method and device, and the method comprises the steps: obtaining a to-be-displayed gray value of each lamp point in an ith frame of to-be-displayed picture, carrying out the expansion processing and assignment processing on the to-be-displayed gray value, and obtaining a second integer part and a second decimal part; according to the second decimal parts of lamp points in each grid area in a square area and the corresponding complementation information in the (i-1) th frame of to-be-displayed picture, lightening part of the lamp points in each grid area, and traversing all the square areas on the LED display screen, so that the contrast ratio of display pictures of all the square areas is improved. According to the technical scheme, the effect of improving the contrast ratio of picture display can be achieved by lightening part of lamp points for each frame of picture, the color bar transition of the display picture is more uniform and fine, the situation of low-gray-scale gray jumping is repaired, the problems of poor color bar transition, shaking, gray jumping and the like of an LED display screen are effectively solved, and the picture display effect of the LED display screen is improved.

Description

technical field [0001] The disclosure of the present invention relates to the technical field of display effects of LED display screens, in particular to a method and device for improving the contrast of LED display screen images. Background technique [0002] As a large-scale display device, LED display has the advantages of high brightness, long life, easy use and maintenance, etc., and is widely used in stations, ports, outdoor advertisements, large-scale cultural and sports activities, and government because of its rich display effects. announcements etc. At present, with the continuous development of display technology, people have higher and higher requirements for the display effect of LED display screens, and there are many factors that affect the display effect of LED display screens, one of which is very important. The color depth capability (gray level) that can be displayed, usually the darker the color depth (higher the gray level), the richer the color of the ...

Claims

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Application Information

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IPC IPC(8): G09G3/32
CPCG09G3/32G09G2320/066
Inventor 何志民王利文
Owner SHENZHEN LIDING PHOTOELECTRIC TECH