Wuhan Jingce Electronic Group Co., Ltd.

Wuhan Jingli Electronic Technology Co., Ltd

Xiaofan Feng

Yafei Shen

Zengqiang Zheng

Ronghua Liu

Zhou Wang

Changdong Ou

Zhao Liu

Kai Chen

Shiwen Luo

Fan Zhong

Zhikun Hong

Erwei Ma

Luning Liu

Hongjun Wu

A chromaticity measurement method and device for calibration of a tiled LED display screen (A) having the advantages of convenience in operation and accurate measurement. The chromaticity measurement method includes: imaging emergent light from the tiled LED display screen (A) with an objective lens (); receiving a light beam from the objective lens () with a transflective lens () and performing beam splitting to obtain a first light beam and a second light beam; receiving the first light beam with an imaging sensor () to obtain an original image; receiving the second light beam in a two-dimensional lattice form with a movable optical fiber array coupling device (), and converting the second light beam into one-dimensional lattice light; and obtaining chromaticity information and spectrum information of a plurality of regions on the tiled LED display screen (A) according to the one-dimensional lattice light with a spectrum acquisition device (). The emergent light is split, analysis is performed with the imaging sensor (), chromaticity measurement and spectrum measurement are performed with a spectrometer (), and calibration and correction are performed on the imaging sensor () on the basis of measurement results of the spectrometer ().

Chromaticity measurement method and device for calibration of tiled LED display screen

The invention discloses a method for evaluating a brightness measurement accuracy of a Demura equipment by generating a noise-added image by adding a random number to an original grayscale image and obtaining a measurement value corresponding to the added random number via the noise-added image displayed by the Demura equipment. The brightness measurement accuracy of the Demura equipment is evaluated based on a correlation between the measured value and the originally added random number to measure a brightness extraction performance of the Demura equipment. The method provided by the invention provides a quantitative and measurable determining method that may better reflect the actual performance of the Demura equipment.

Method for evaluating brightness measurement accuracy of Demura equipment

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Wuhan, China

Xiaofan Feng