US 12,461,027 B2
Detection method and detection device for display screen
Can Huang, Beijing (CN); Hongcheng Gao, Beijing (CN); Jiandong Bao, Beijing (CN); Dawei Shi, Beijing (CN); Lu Yang, Beijing (CN); Wentao Wang, Beijing (CN); and Weitao Ma, Beijing (CN)
Assigned to Chongqing BOE Display Technology Co., Ltd., Chongqing (CN); and Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 18/042,857
Filed by Chongqing BOE Display Technology Co., Ltd., Chongqing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Aug. 24, 2021, PCT No. PCT/CN2021/114229
§ 371(c)(1), (2) Date Feb. 24, 2023,
PCT Pub. No. WO2022/042521, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 202010900699.2 (CN), filed on Aug. 31, 2020.
Prior Publication US 2024/0027343 A1, Jan. 25, 2024
Int. Cl. G01N 21/47 (2006.01); H10K 71/70 (2023.01)
CPC G01N 21/4738 (2013.01) [H10K 71/70 (2023.02)] 20 Claims
OG exemplary drawing
 
19. A device for detecting a display screen, comprising:
a light source configured to emit light onto a surface of a display screen to form a diffuse reflection, wherein the light source comprises an initial first color channel value a1 and an initial second color channel value b1;
a detector configured to measure a first color channel value a and a second color channel value b of the reflected light; and
a processor configured to:
calculate a color breakup value lab of the reflected light by: lab=√(a−a1)2+(b−b1)2;
calculate, in response to (a+b) being not equal to 0, a hue value ε by: ε=|a+b|/(a+b);
calculate a color breakup and hue quantization value φ of the reflected light by: φ=lab×ε=|a+b|√(a−a1)2+(b−b1)2/(a+b); and
determine whether the display screen is qualified based on determining whether the color breakup and hue quantization value φ is within a predetermined quantization value range.