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Luminance and chrominance separately-acquiring and hybrid-correction method of LED display screen

A technology of LED display screen and correction method, which is applied in the direction of using solid-state color display device image reproducer, color signal processing circuit, picture duplicator, etc.

Active Publication Date: 2010-11-24
CHANGCHUN CEDAR ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0049] According to the above requirements, the chromaticity parameters of each display module (display pixel) must first be provided. If the chromaticity parameters of the LED display are inconsistent, they are distributed according to the module, which is relatively easy to operate, and the chromaticity parameters are inconsistent. It is basically impossible to deal with the patented method

Method used

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  • Luminance and chrominance separately-acquiring and hybrid-correction method of LED display screen
  • Luminance and chrominance separately-acquiring and hybrid-correction method of LED display screen
  • Luminance and chrominance separately-acquiring and hybrid-correction method of LED display screen

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Embodiment 1

[0125] Set the primary color display function characteristic of the display screen that requires chromaticity space conversion to a linear relationship, and the linear coefficient is 1, and the input display data R, G, and B are the original input display data. The present invention is similar to the chromaticity space correction process described in patent 03127037.9. as attached Figure 4 As shown, the control system for realizing the separation, collection, and mixed correction method of brightness and chromaticity of the LED display screen of the present invention includes a red primary color input display data controller 1, a green primary color input display data controller 2, a blue primary color input display data controller 3, and a general control logic 4. Element C of the chromaticity space transformation parameter matrix of the display pixel currently being calculated [m，n][i，j]_min rr Buffer 5, chromaticity space transformation parameter matrix element C of the ...

Embodiment 2

[0129] Considering that the display characteristics of LED are not completely linear, it needs to be converted into linear data for real-time calculation when performing brightness and chromaticity correction, and sometimes data output is required after the calculation is completed, so an inverse conversion is also required.

[0130] Here, it is assumed that the display function characteristics of each primary color of the LED are:

[0131] R L = Φ R ( R ) G L = Φ G ( G ) ...

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Abstract

The invention relates to a luminance and chrominance separately-acquiring and hybrid-correction method of an LED display screen, which comprises the following steps of: detecting a chrominance parameter of any pixel in each module of the LED display screen to be used as the chrominance coordinate of the module of the pixel; carrying out luminance acquisition on each display pixel on the display screen to obtain the luminance parameter of each display pixel; determining the reference chrominance coordinate of each primary color and the reference luminance of each primary color of the display screen; determining the chrominance space of any pixel; determining a chrominance space transformation parameter matrix of each display pixel; obtaining real-time driving display data of each pixel by using the chrominance space transformation parameter matrix of each display pixel; and driving the display screen by using the real-time driving display data. With the method, the problem on the chrominance uniformity correction of the LED display screen can be effectively solved, and the high chrominance parameter acquiring efficiency is achieved.

Description

technical field [0001] The invention belongs to the technical field of flat-panel video display of light-emitting diodes, and relates to an LED display screen brightness and chromaticity separation acquisition mixing correction method for improving the image display quality, display color and uniformity of the flat-panel display. Background technique [0002] For LED flat panel display, its luminous panel is composed of tens of thousands, even millions of independent full-color light-emitting diodes (hereinafter referred to as LED tubes) or LED display modules formed by LED tubes. Due to the influence of the physical characteristics of the LED semiconductor device itself and its production process, there are inconsistencies in the LED display module and between modules, which makes the brightness and chromaticity distribution of the LED flat panel display uneven. [0003] It is manifested that the distribution positions of each display module on the screen (up to the smalles...

Claims

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Application Information

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IPC IPC(8): H04N9/30H04N9/64
Inventor 丁铁夫王瑞光陈宇郑喜凤
Owner CHANGCHUN CEDAR ELECTRONICS TECH CO LTD