LED screen brightness correction method and device

Abstract

The invention relates to an LED screen brightness correction method and device. The method comprises the steps of obtaining three photos when an LED screen displays three colors of red, green and blueunder preset brightness; respectively determining the measurement brightness of all lamp points on each of the three photos; determining the measurement relative brightness of the lamp points according to the measurement brightness of all the lamp points on each picture; and according to the preset relation curves corresponding to the three colors and the measured relative brightness of the lamppoints, obtaining the target relative brightness of each lamp point in each picture, and taking the target relative brightness of the lamp points as a correction coefficient of the lamp points, so that the LED screen performs brightness correction according to the correction coefficient. Thus, the LED screen correction process is greatly simplified under the condition that the correction accuracyis improved, the cost is reduced, and the LED screen correction method is more convenient for users to use.

Description

technical field [0001] The present disclosure relates to the field of LED screen calibration, and in particular, to a method and device for LED screen brightness calibration. Background technique [0002] For the full-color LED screen that is currently used most, it is composed of a color LED array, and the color of each color LED includes red, green and blue three-color LED lights. According to the principle of addition of three primary colors, various complex colors can be displayed by controlling the pulse width modulation signals of RGB three-color lights. [0003] According to the above LED color rendering principle, in fact, before the LED screen leaves the factory, if the RGB three-color color matching of a single light point is inconsistent, it will cause the screen "snowflakes" or "pitting" phenomenon. And with the long-term use of the LED screen, the degree of attenuation of the RGB three-color lights is different, which will also cause deviations in brightness or...

AI Technical Summary

Problems solved by technology

At present, the correction technology of full-color LED screens is mainly concentrated in a few developed countries abroad, and the correction equipment is expensive

When using general shooting equipment such as cameras for calibration, due to the difference between the spectral response of the camera and the CIE-XYZ standard, there is a large error between it and the brightness and chromaticity values ​​measured by the photometer, so it cannot be directly used for calibration purposes

Therefore, the calibration process of the brightness of the LED screen in the prior art is not only cumbersome but also expensive, and the calibration accuracy cannot be guaranteed, which is inconvenient for users

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