Method and system for correcting brightness and chromaticity of LED display device based on human vision

Abstract

The invention relates to a method and system for correcting brightness and chromaticity of an LED display device based on human vision. Wherein, the correction method includes the steps of: (a) calculating the average value of the initial brightness and chromaticity correction coefficients of the area to be corrected; (b) controlling the area to be corrected and the observation reference area to display the first correction picture of the same color for human eyes to observe; (c) responding Due to the multiple component values ​​in the color model input by the component adjustment operation of the first correction picture displayed in the area to be corrected, the average value of the corrected brightness and chromaticity correction coefficients in the area to be corrected is calculated; (d) using the initial average value of the brightness and chromaticity correction coefficients calculating an adjustment matrix with the average value of the corrected brightness and chromaticity correction coefficient; and (e) applying the adjustment matrix to multiple LED pixels in the area to be corrected to obtain the corrected brightness and chromaticity correction coefficient of the area to be corrected. The present invention eliminates differences in brightness and chromaticity between regions based on human eye visual adjustment, which can make LEDs achieve a high degree of consistency in human visual brightness and chromaticity.

Description

technical field [0001] The invention relates to the technical field of LED display correction, in particular to a method for correcting brightness and chromaticity of an LED display device based on human vision and a system for correcting brightness and chromaticity of an LED display device based on human vision. Background technique [0002] LED display screens have been widely used in city squares, commercial centers and other places due to their bright colors, high visibility, low power consumption, environmental protection and energy saving. Visual inconsistencies. The root cause of this problem of inconsistency in brightness and chromaticity lies in the LED itself. For example, the brightness of LED lights in the same production batch may vary by 50%, and the wavelength (chromaticity) may vary by 15-20nm. Visually it is very noticeable. [0003] In order to cope with the current situation that the consistency of LED production cannot be strictly controlled, LED manufa...

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Problems solved by technology

[0010] In addition, the LED display using splicing method 2 can also be adjusted based on human vision. The traditional adjustment of different batches of internal LED single points one by one is obviously the most inefficient, and it is basically no longer used; The more commonly used method is to set different target values ​​multiple times through the qualitative judgment of human eyes, and use similar correction methods to regenerate the correction coefficients of all LED light points in each area. This method has also been proven in practical applications. Its efficiency is relatively low

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