A display brightness measurement method, system and terminal

Abstract

The invention discloses a method, system and terminal for measuring brightness of a display screen. The method includes the following steps: S1: Acquiring photographed images when the display screen displays different grayscale images at different working distances, and calculating the brightness of each photographed image Brightness information; S2: Establish a correction model between the display screen at different working distances and different gray scales and the corresponding brightness according to the brightness information of different captured images; S3: Obtain when the display screen displays any gray scale picture at any working distance and calculate the first luminance value of the captured picture; S4: calibrate the first luminance value of the display screen according to the working distance, the grayscale value of the grayscale picture, and the calibration model to obtain the corrected luminance value; the present invention eliminates the deviation of camera acquisition data caused by the working distance of the display screen and the gray scale value, improves the accuracy of camera imaging, thereby improving the accuracy of display screen brightness and chromaticity measurement.

Description

technical field [0001] The invention belongs to the field of display technology, and more specifically relates to a method, system and terminal for measuring brightness of a display screen. Background technique [0002] Due to differences in technology, process and raw materials, differences in luminance and chromaticity inevitably occur in the production process of flat panel displays. In order to control the quality, panel manufacturers will measure the brightness and chromaticity of the produced displays. The traditional method of measuring chromaticity and brightness is: use equipment that conforms to the CIE standard response curve, such as a luminance meter, to integrate the spectrum of the panel to be tested to obtain chromaticity and luminance values; this special equipment has high measurement accuracy for luminance and chromaticity , but the special equipment can only measure the luminance value of one or several pixels at a time, which is inconvenient to use. In ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at at least one defect or improvement requirement of the prior art, the present invention provides a method, system and terminal for measuring brightness of a display screen. Firstly, a correction model between the display screen at different working distances and different gray scales and the corresponding brightness is established. The correction model is used to correct the brightness of the camera shooting, eliminate the influence of the working distance of the display screen and the gray scale value, and improve the accuracy of the brightness measurement of the display screen; The mapping relationship model between brightness; then according to the mapping relationship model, the brightness value of the display screen captured by the camera is converted into a higher-precision brightness value measured by a special detection device; through this method, not only The luminance value of all pixels can also be converted into a luminance value with higher precision measured by special detection equipment, which further improves the measurement accuracy under the premise of ensuring detection efficiency; its purpose is to solve the problems in the prior art The brightness and chromaticity detection method of the display screen cannot take into account the problem of detection efficiency and measurement accuracy

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