A method and system for correcting brightness and chromaticity of an LED cabinet

Abstract

The invention relates to the technical field of brightness and chromaticity correction of LED cabinets, in particular to a brightness and chromaticity correction method and correction system of an LED cabinet. The method for calibrating the brightness and chromaticity of an LED box of the present invention includes (1) extracting a reference box, (2) calibrating a single box of the reference box, (3) splicing the LED display screen, (4) importing the correction coefficient of the reference box, (5) Photo analysis generates an entire screen correction coefficient. In the LED box brightness and chromaticity correction method of the present invention, the reference box is selected as the benchmark, and then the entire screen corresponding to the corrected box is generated according to the imported reference box calibration coefficient file analysis. Correction coefficient file, thus eliminating the difference in brightness and chromaticity between any batch of LED cabinets and realizing the mixed use of any batch of LED cabinets. The LED cabinet brightness and chromaticity correction system of the present invention includes a reference cabinet, a calibrated cabinet, a brightness and chromaticity acquisition terminal, and a control processing terminal, and realizes the brightness and chromaticity correction between the LED cabinets.

Description

technical field [0001] The invention relates to the technical field of brightness and chromaticity correction of LED cabinets, in particular to a method and system for correcting brightness and chromaticity of LED cabinets. Background technique [0002] Due to the discreteness and attenuation of LED light-emitting tubes and the discreteness of circuit components, LED displays have inconsistent brightness and chromaticity, which will seriously affect the display quality. In order to overcome the problem of non-uniformity of brightness and chromaticity of LED display screen, point-by-point correction technology came into being and developed rapidly, which can significantly improve the uniformity of LED display screen and improve the display quality. According to the different application occasions, the existing calibration technology can be roughly divided into two types: one is box-by-box calibration on the production line, that is, box calibration; the other is on-site large...

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Problems solved by technology

[0003] There is a common situation in the LED display industry that multiple batches of cabinets with bright color differences are mixed. The current single-box calibration can only solve the problem of bright color difference inside the cabinet, and the difference in bright colors between cabinets cannot be solved; for example: the application number is 201410292607.1, Chinese invention patents titled LED Display Brightness and Chromaticity Correction Method and LED Cabinet Brightness and Chromaticity Correction Method;

[0004] The single-box correction in the prior art, no matter whether it uses an industrial camera or a SLR camera to collect brightness and chromaticity information, the collection accuracy cannot meet the production requirements, and a third-party device is required to calibrate the accuracy of the camera data, or a calibration light source is used to calibrate the camera. However, this method When performing a single cabinet calibration, there is still an exposure difference for each photo, resulting in environmental errors in the brightness and chromaticity information between the LED cabinets collected each time; for example: the application number is 201610077983.8, and the name is LED Display Module Uniformity Calibration Method in China Patent

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