US 12,232,404 B2
Display substrate and manufacturing method thereof and display apparatus
Huaisen Ren, Beijing (CN); Ke Yang, Beijing (CN); Tao Gao, Beijing (CN); Zubin Lv, Beijing (CN); Peng Hou, Beijing (CN); Yanqiang Wang, Beijing (CN); and Yongzhan Han, Beijing (CN)
Assigned to Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Filed by Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Filed on May 17, 2023, as Appl. No. 18/319,435.
Application 18/319,435 is a division of application No. 17/210,844, filed on Mar. 24, 2021, granted, now 11,737,342.
Claims priority of application No. 202010735058.6 (CN), filed on Jul. 28, 2020.
Prior Publication US 2023/0292579 A1, Sep. 14, 2023
Int. Cl. H10K 65/00 (2023.01); G06V 40/13 (2022.01); H10K 59/12 (2023.01); H10K 59/122 (2023.01); H10K 59/124 (2023.01); H10K 59/125 (2023.01); H10K 59/40 (2023.01)
CPC H10K 65/00 (2023.02) [G06V 40/1318 (2022.01); H10K 59/122 (2023.02); H10K 59/124 (2023.02); H10K 59/125 (2023.02); H10K 59/1201 (2023.02); H10K 59/40 (2023.02)] 9 Claims
OG exemplary drawing
 
1. A display substrate having a fingerprint identification region, the display substrate comprising:
a base substrate;
a display unit on the base substrate and comprising a display thin film transistor and a light-emitting device, a second electrode of the display thin film transistor being coupled to a first electrode of the light-emitting device;
a fingerprint identification unit at a gap between adjacent display units in the fingerprint identification region and comprising a fingerprint identification transistor and a photosensitive device;
a gate insulating layer on a side of an active layer of the display thin film transistor and an active layer of the fingerprint identification transistor distal to the base substrate;
a pixel defining layer on a side of the display thin film transistor and the fingerprint identification transistor distal to the base substrate; and
an encapsulation layer configured to encapsulate the display unit, located on a side of the pixel defining layer distal to the display thin film transistor and the fingerprint identification transistor, and located in a first via hole penetrating through the pixel defining layer, wherein
the photosensitive device is a vertical PIN photodiode and located on a side of the encapsulation layer away from the pixel defining layer, and a second electrode of the photosensitive device is coupled to a first electrode of the fingerprint identification transistor through a second via hole penetrating through the encapsulation layer in the first via hole.