CCD-type optical quality measurement device

Abstract

The invention discloses a CCD-type optical quality measurement device; in the device, a digital visual device transmits a video signal to a computer, and the read pixel value of the video is converted into a read luminance value within a luminous intensity unit and the read x and y values of CIE1931 through the conversion of a characterization factor. The data of the CCD-type optical quality measurement device can be compared with that of any one brightness photometer and colorimeter after being modified by the characterization comparison factor, is a measurement device which judges whether the optical quality of the luminance, the chromaticity and the uniformity of a white light plane luminous source meet relevant standards, is applicable to the product development labs and the on-line production of research and development units, can quickly detect the whole-picture optical performance and quality degree, shorten the product design cycle and reduce the risks of randomness and bad batch.

Description

technical field [0001] The invention relates to an optical quality measuring device, in particular to a CCD type optical quality measuring device. Background technique [0002] LCD (Liquid Crystal Display, liquid crystal display) uses BLU (Back Light Unit, backlight module) as the light source and uses LCM (Liquid Crystal Module, liquid crystal module) to display images. The optical quality of the light source (such as: luminance, chromaticity, Uniformity, MURA) directly affects the performance of the LCD. Ordinary luminance and colorimeters can only measure at a single point, or with an X-Y table for point-by-point measurement. This measurement method takes time and does not meet the benefits of mass production, and it is impossible to comprehensively control the quality of the light source. [0003] The material and structure of each component of the LCD determine the luminance, chromaticity and uniformity of the LCD. Efficient and comprehensive detection of the optical q...

AI Technical Summary

Problems solved by technology

Taking the BLU light source in the LCD as an example, at present most of them use single-point measurement luminance and colorimeters together with an X-Y table as an optical quality detection device. The number of measurement points and positions specified by the Video Electronics Standards Association) are used to measure the BLU point by point. This detection method is time-consuming and has doubts about whether the repeatability and reproducibility of the measured points are consistent due to the need for manual positioning.

Due to the long detection time and the inability to measure the entire light source, although random sampling can be performed, there is still the risk that the problematic area does not fall at the position of the VESA measurement point, and the quality cannot be checked efficiently and reduce the risk of poor batch or randomness

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