US 12,203,809 B2
Chromaticity measurement method and device for calibration of tiled LED display screen
Changdong Ou, Wuhan (CN); Zengqiang Zheng, Wuhan (CN); Shiwen Luo, Wuhan (CN); Zhikun Hong, Wuhan (CN); Zhou Wang, Wuhan (CN); Fan Zhong, Wuhan (CN); Luning Liu, Hubei (CN); Xiaofan Feng, Wuhan (CN); Ronghua Liu, Hubei (CN); Yafei Shen, Wuhan (CN); and Kai Chen, Wuhan (CN)
Assigned to Wuhan Jingce Electronic Group Co., LTD, Wuhan (CN); and Wuhan Jingli Electronic Technology Co., LTD, Wuhan (CN)
Appl. No. 17/997,205
Filed by WUHAN JINGCE ELECTRONIC GROUP CO., LTD, Hubei (CN); and WUHAN JINGLI ELECTRONIC TECHNOLOGY CO., LTD, Hubei (CN)
PCT Filed Mar. 31, 2021, PCT No. PCT/CN2021/084397
§ 371(c)(1), (2) Date Oct. 26, 2022,
PCT Pub. No. WO2022/141881, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 202011580421.8 (CN), filed on Dec. 28, 2020.
Prior Publication US 2023/0314223 A1, Oct. 5, 2023
Int. Cl. G09G 3/32 (2016.01); G01J 3/02 (2006.01); G01J 3/28 (2006.01); G01J 3/50 (2006.01)
CPC G01J 3/506 (2013.01) [G01J 3/0208 (2013.01); G01J 3/0218 (2013.01); G01J 3/2823 (2013.01); G09G 3/32 (2013.01); G01J 2003/2866 (2013.01); G09G 2300/026 (2013.01); G09G 2320/0693 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A chromaticity measurement method for calibration of a tiled LED display screen, the method comprising:
performing imaging on emergent light from a tiled LED display screen with an objective lens (1);
receiving a light beam from the objective lens (1) and performing beam splitting with a transflective lens (2) to obtain a first light beam and a second light beam;
receiving the first light beam with an imaging sensor (3) to obtain an original image;
receiving the second light beam in a two-dimensional lattice form with a movable optical fiber array coupling device (4), and converting the received 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 according to the one-dimensional lattice light with a spectrum acquisition device (5).