US 11,837,139 B2
Method for collection and correction of display unit
Xifeng Zheng, Changchun (CN); Xinyue Mao, Changchun (CN); Tiefu Ding, Changchun (CN); Guixin Guo, Changchun (CN); and Yang Wang, Changchun (CN)
Assigned to CHANGCHUN CEDAR ELECTRONICS TECHNOLOGY CO., LTD, Changchun (CN)
Filed by Changchun Cedar Electronics Technology Co., Ltd, Changchun (CN)
Filed on Aug. 25, 2022, as Appl. No. 17/895,271.
Application 17/895,271 is a continuation of application No. PCT/CN2020/086311, filed on Apr. 23, 2020.
Prior Publication US 2022/0415238 A1, Dec. 29, 2022
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/2003 (2013.01) [G09G 2320/0233 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/0693 (2013.01); G09G 2360/145 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for collection and correction of a display unit, comprising the following steps:
step I: placing a camera in front of the display unit to be corrected, such that a center normal of the display unit to be corrected coincides with an optical axis of the camera;
step II: collecting RGB brightness data of the display unit to be corrected to obtain an original brightness matrix; placing a standard brightness plane in front of a lens of the camera, and keeping a center normal of the standard brightness plane coincident with the optical axis of the camera; collecting RGB brightness data of the standard brightness plane, and obtaining a final brightness correction matrix of the camera according to the RGB brightness data of the standard brightness plane;
step III: multiplying the original brightness matrix by the final brightness correction matrix of the camera to obtain a restored real brightness matrix without curved surface distortion of the camera; and
step IV: performing brightness correction on the real brightness matrix to obtain a corrected brightness matrix, thereby completing on-site collection and correction of the display unit.