US 12,170,042 B2
Detection circuit for detecting luminance of ambient light, display panel, and detection method
Lianghao Zhang, Beijing (CN); Xinle Wang, Beijing (CN); Yifan Song, Beijing (CN); Wenchao Han, Beijing (CN); Zhaohui Meng, Beijing (CN); Wanzhi Chen, Beijing (CN); and Jing Liu, Beijing (CN)
Assigned to Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/778,489
Filed by Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed May 18, 2021, PCT No. PCT/CN2021/094266
§ 371(c)(1), (2) Date May 20, 2022,
PCT Pub. No. WO2022/241631, PCT Pub. Date Nov. 24, 2022.
Prior Publication US 2024/0153423 A1, May 9, 2024
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/20 (2013.01) [G09G 2310/0286 (2013.01); G09G 2310/0297 (2013.01); G09G 2320/0626 (2013.01); G09G 2360/144 (2013.01); G09G 2360/16 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A detection circuit, comprising:
a conversion circuit configured to acquire a photoelectric sensing signal in real time and convert the acquired photoelectric sensing signal into a luminance value;
a storage circuit connected to the conversion circuit and configured to store N luminance values from the conversion circuit on a first input first output basis;
a discrimination circuit connected to the storage circuit and configured to determine whether at least two luminance values of the N luminance values meet a preset condition; and
an output circuit connected to the discrimination circuit and the storage circuit, and configured to output a preset default luminance value in response to the at least two luminance values meeting the preset condition and output at least one of the N luminance values in response to the at least two luminance values not meeting the preset condition;
wherein the discrimination circuit comprises: a first discrimination sub-circuit connected to the storage circuit and configured to determine whether at least one luminance value of the N luminance values is less than a preset reference luminance value; and a second discrimination sub-circuit connected to the storage circuit and configured to determine whether a difference between the at least two luminance values of the N luminance values exceeds a preset reference luminance difference.