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Method for correcting chrominance LED whole colorful display screen based on space vector

A technology of LED display and space vector, applied in the direction of static indicators, instruments, etc., can solve the problems of blurred screen and uneven brightness of the whole LED screen, to correct the difference of chromaticity and brightness, overcome the uneven brightness of the whole screen, Improve the effect of color purity and uniformity

Active Publication Date: 2009-08-19
YAHAM OPTOELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, with the development of LED display technology, its inherent defects have also been exposed
Due to the limitations of LED production technology, there is a 20% difference in the brightness of LED lights, that is, the red, green, and blue lights have a 20% difference in each channel, resulting in uneven brightness of the entire LED screen. And the result of Huaping

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  • Method for correcting chrominance LED whole colorful display screen based on space vector
  • Method for correcting chrominance LED whole colorful display screen based on space vector
  • Method for correcting chrominance LED whole colorful display screen based on space vector

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Embodiment Construction

[0037] The correction method of the chromaticity LED full-color display screen based on the space vector of the present invention is as follows: figure 1 As shown, the method includes: LED display screen to be corrected (step 1), CCD imaging (step 2), image recognition (step 3), color space correction (step 4), color characteristic input (step 5), FPGA (Field Programmable Gate Array, field programmable gate array) (step 6), LED display screen control system (step 7).

[0038] like figure 1 As shown, in step 1, the LED display screen includes a display screen composed of an array of LED devices such as a giant display screen for an outdoor sports field, a stage, an outdoor advertisement, or a large indoor display.

[0039] In step 2, the CCD imaging is an image acquisition step of the LED display screen, where CCD refers to a charge-coupled device, which is a semiconductor device capable of converting optical images into digital signals. In this embodiment, at first the image o...

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Abstract

The invention relates to a calibration method of a chromaticity LED all-color display screen based on space vector. The method comprises the following steps of: a. collecting images of the LED display screen, testing the brightness and chromaticity of each pixel of the LED display screen and obtaining the data of the chromaticity coordinates and the brightness of the single LED lamp in the pixel on the LED display screen; b. taking image fields of red, green and blue passages formed by the collected initial data as the initial data of vector calibration, importing BMP bitmap into a computer, and differentiating each pixel to obtain a pixel layout chart; c. respectively calibrating the values of the red, the green and the blue passages of each pixel to obtain calibration data of each LED; d. resynthesizing the fundamental colors of pure red, green and blue and representing colors by the three fundamental colors; and e. when the data of the images is obtained by a calibration module in an LED display controller through DVI signal decoding, carrying out calibration and calculation point by point aiming at the calibration values of each specific coordinate point, and obtaining calibrated images at the LED display screen. The method can effectively increase the purity and uniformity of the colors of the LED display screen.

Description

【Technical field】 [0001] The invention relates to an LED full-color display screen, in particular to a method for calibrating a chromaticity LED full-color display screen based on a space vector. 【Background technique】 [0002] LED display is a large-scale display system integrating microelectronics technology, optoelectronics technology, computer technology and information processing technology. It is widely used in advertising, securities, information dissemination, news release, etc. due to its bright colors, wide dynamic range, high brightness, long life, and stable performance. It has become the most important display media in the world. The LED display screen is a display screen composed of an array of devices used to display various information such as text, graphics, images, animations, market prices, videos, and video signals through a certain control method. In recent years, due to the gradual maturity and improvement of the manufacturing and processing technology...

Claims

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Application Information

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IPC IPC(8): G09G3/32
Inventor 王占明钟涛
Owner YAHAM OPTOELECTRONICS CO LTD
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