US 12,457,866 B2
Display assembly, display apparatus, and fingerprint recognition method
Yang Zhao, Shenzhen (CN); Xinkai Wu, Shanghai (CN); CHunyen Liu, Dongguan (CN); Xiaojun Guo, Shanghai (CN); Hu He, Dongguan (CN); Xiaokuan Yin, Shanghai (CN); and Xiao Hou, Shanghai (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Appl. No. 17/915,909
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
PCT Filed Mar. 23, 2021, PCT No. PCT/CN2021/082248
§ 371(c)(1), (2) Date Sep. 29, 2022,
PCT Pub. No. WO2021/197118, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 202010246037.8 (CN), filed on Mar. 31, 2020.
Prior Publication US 2023/0144932 A1, May 11, 2023
Int. Cl. G06V 40/13 (2022.01); G02F 1/1333 (2006.01); H10K 39/34 (2023.01); H10K 59/131 (2023.01); H10K 59/65 (2023.01); H10K 59/12 (2023.01)
CPC H10K 59/131 (2023.02) [G02F 1/13338 (2013.01); G06V 40/1318 (2022.01); H10K 39/34 (2023.02); H10K 59/65 (2023.02); H10K 59/12 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A display assembly, comprising:
a display panel including a first surface and a second surface opposite to the first surface, wherein the first surface is a light-emitting surface;
a protective cover; and
a fingerprint recognition module located on the light-emitting surface of the display panel and between the display panel and the protective cover, wherein:
the fingerprint recognition module comprises a plurality of fingerprint recognition units, and each fingerprint recognition unit comprises at least one phototransistor and one switch transistor;
the phototransistor comprises a first active layer, a first gate, a first source, and a first drain, a material for making the first active layer comprises an organic semiconductor material, in a direction perpendicular to the display assembly, the first drain and the first gate partially overlap to form a first capacitor, and the first source is connected to the first gate through a via in a first insulation layer of the fingerprint recognition module;
the switch transistor comprises a second active layer, a second gate, a second source, and a second drain; and
the fingerprint recognition module comprises a first metal layer, wherein the first metal layer is patterned to form the first source, the first drain, the second source, and the second drain, and the first drain is connected to the second source.