Optical camera brightness detection value and chromaticity detection value calibration method and device
An optical camera and brightness detection technology, which is applied in the field of manufacturing, can solve the problems of large errors between the detection value and the actual value of the chromaticity and brightness of the liquid crystal display
Active Publication Date: 2019-04-26
HUAWEI TECH CO LTD
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[0005] The embodiment of the present invention provides a method and device for calibrating the luminance detection value and the chromaticity detection value of the optical camera to solve the problem of the detection value detected by the optical camera and the chromaticity of the liquid crystal display when the optical camera is used to detect the chromaticity and brightness of the liquid crystal display. The problem of large error in the actual value of brightness and brightness
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[0022] The applicant found that among the various detection equipment used for the detection of chromaticity and brightness of the display screen, the detection efficiency of the point-type color analyzer is low, but the detection accuracy is relatively high. The error between the detected value obtained by detecting the chromaticity and brightness of the LCD screen and the actual value of the chromaticity and brightness of the liquid crystal display is relatively small. Therefore, before using the optical camera to detect the chromaticity and brightness of the LCD screen, the point type color analyzer can be used as the benchmark detection equipment. Based on the error between the detection values obtained by the instrument, the detection value obtained by the optical camera is corrected, thereby improving the accuracy of the detection value when the optical camera is used for detection. It should be noted here that, in addition to the point-type color analyzer, other devic...
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A calibration method and apparatus for a brightness detection value and a chrominance detection value of an optical camera. The calibration method comprises: dividing a brightness range of a reference display screen into a predetermined number of screen brightness levels; calculating a brightness correction factor; calculating a chrominance correction factor at various screen brightness levels; and using the brightness correction factor and the chrominance correction factor to calibrate a brightness value to be calibrated and a chrominance value to be calibrated which are obtained by an optical camera detecting a display screen to be calibrated, so as to obtain a brightness calibration value and a chrominance calibration value. In this calibration method, a brightness detection value and a chrominance detection value which are obtained through the detection by the optical camera may be corrected as a brightness detection value and a chrominance detection value which are obtained through detection by a reference detection device, so as to reduce errors between a brightness detection value and an actual brightness value and between a chrominance detection value and an actual chrominance value when an optical camera is used to perform brightness and chrominance detections of a display screen.
Description
technical field [0001] The invention relates to the field of manufacturing, in particular to a method and device for calibrating the brightness detection value and chromaticity detection value of an optical camera. Background technique [0002] With the increasing popularity of intelligent terminal equipment, the application range of various display screens is becoming wider and wider. Due to the production process and other reasons, after the display screen is produced, there may be color cast or abnormal brightness. Therefore, before putting the display screen into use, it is necessary to calibrate its chromaticity and brightness to eliminate the problem of color cast or abnormal brightness, and avoid the use of defective display screens. [0003] When calibrating the chromaticity and brightness of the display screen, it is necessary to obtain the actual values of the chromaticity and brightness of the display screen first, and then judge whether the actual value is wit...
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Login to View More IPC IPC(8): G01J1/10G01J3/50
CPCG01J1/10G01J3/50
Inventor 钱永义
Owner HUAWEI TECH CO LTD