Point-by-point correcting system and point-by-point correcting method for LED display screen

Abstract

The invention discloses a point-by-point correcting system and a point-by-point correcting method for LED display screen. The system comprises an LED display screen, a data acquisition unit, a correcting unit, a revision unit and a video controller; the data acquisition unit is connected with the correcting unit; the correcting unit is connected with the LED display screen through the video controller; and the revision unit is connected with the correcting unit. The method comprises the following steps of: calculating correction coefficient after calculation preparation of correction coefficient, and revising the calculated correction coefficient, then correcting point by point through the revised correction coefficient. The point-by-point correcting system using the point-by-point correcting method, as the system is provided with a revising unit for revising the correction coefficient and correcting point by point through the revised correction coefficient, can not only improve chromaticity uniformity of the LED display screen but also remove the phenomenon of snow point and pock mark.

Description

technical field [0001] The invention relates to the technical field of LED displays, in particular to a point-by-point correction system for an LED display screen and a point-by-point correction method for an LED display screen adopted by the system. Background technique [0002] The problem of chromaticity uniformity of LED display screens has always been a major problem in the industry. It is generally believed that the uneven brightness of LEDs can be corrected at a single point to improve the uniformity of brightness, but the uneven chromaticity cannot be corrected. It can be improved by subdividing and filtering the LED color coordinates. However, as people's requirements for LED display screens are getting higher and higher, only subdividing and screening LED color coordinates can no longer satisfy people's critical eyes. [0003] In the latest technology, the display screen can be corrected by the method of mutual compensation of three primary colors, which can impro...

AI Technical Summary

Problems solved by technology

[0002] The problem of chromaticity uniformity of LED display screens has always been a major problem in the industry. It is generally believed that the uneven brightness of LEDs can be corrected at a single point to improve the uniformity of brightness, but the uneven chromaticity cannot be corrected. Can be improved by subdividing and filtering LED color coordinates

Especially when the wavelength and brightness level of the blue light are scattered, there will inevitably be many blue LEDs that only need to compensate for a small red-green coefficient to reach the target value, and at the same time there will be many blue LEDs that need to compensate for a large red-green coefficient In order to reach the target value, there will be a lot of snowflakes or pockmarks in the blue after correction, so it needs to be improved

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