US 12,245,471 B2
Display substrate and display device
Ying Han, Beijing (CN); Yicheng Lin, Beijing (CN); Ling Wang, Beijing (CN); Guoying Wang, Beijing (CN); Xing Zhang, Beijing (CN); Zhan Gao, Beijing (CN); and Pan Xu, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/788,387
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Aug. 4, 2021, PCT No. PCT/CN2021/110600
§ 371(c)(1), (2) Date Jun. 23, 2022,
PCT Pub. No. WO2022/062695, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 202011018998.X (CN), filed on Sep. 24, 2020.
Prior Publication US 2023/0031110 A1, Feb. 2, 2023
Int. Cl. H01L 27/14 (2006.01); H01L 27/12 (2006.01); H10K 50/86 (2023.01); H10K 59/121 (2023.01); H10K 59/13 (2023.01); H10K 59/131 (2023.01)
CPC H10K 59/13 (2023.02) [H01L 27/124 (2013.01); H01L 27/1255 (2013.01); H10K 50/865 (2023.02); H10K 59/1213 (2023.02); H10K 59/1216 (2023.02); H10K 59/131 (2023.02)] 18 Claims
OG exemplary drawing
 
1. A display substrate, comprising:
a substrate;
a plurality of pixel units disposed on the substrate, wherein each of the pixel units comprises a plurality of sub-pixels, and each of the sub-pixels comprises a light-emitting element and a pixel drive circuit for driving the light-emitting element;
a photosensitive circuit disposed on the substrate, wherein the photosensitive circuit is configured to seuse light emitted by at least one of the pixel units; and
a first conductive film layer disposed on the substrate,
wherein the pixel drive circuit at least comprises a drive transistor, the drive transistor is electrically connected to the light-emitting element, the drive transistor at least comprises a drive active layer and a gate electrode, the gate electrode of the drive transistor is located in a side of the drive source layer away from the substrate, and an orthographic projection of the gate electrode of the drive transistor on the substrate at least partially overlaps with an orthographic projection of the drive active layer on the substrate;
wherein the first conductive film layer at least comprises a first light shielding portion, the first light shielding portion is located between the substrate and the drive active layer, and an orthographic projection of the first light shielding portion on the substrate at least partially overlaps with the orthographic projection of the drive active layer on the substrate; and
wherein the first light shielding portion is electrically connected to the gate electrode of the drive transistor; wherein the photosensitive circuit at least comprises a photosensitive element and a control transistor, the control transistor is electrically connected to the photosensitive element, the control transistor at least comprises a control active layer and a gate electrode, the gate electrode of the control transistor is located on a side of the control active layer away from the substrate, and an orthographic projection of the gate electrode of the control transistor on the substrate at least partially overlaps with an orthographic projection of the control active layer on the substrate; the first conductive film layer further comprises a second light shielding portion, the second light shielding portion is located between the substrate and the control active layer, and an orthographic projection of the second light shielding portion on the substrate at least partially overlaps with the orthographic projection of the control active layer on the substrate; and the second light shielding portion is electrically connected to the gate electrode of the control transistor; wherein the control active layer and the drive active layer are both located in a same semiconductor film layer, and the gate electrode of the control transistor and the gate electrode of the drive transistor are both located in a same second conductive film layer; the display substrate further comprises a third conductive film layer disposed on a side of the second conductive film layer away from the substrate, the third conductive film layer at least comprises a first power supply signal line, a first reference signal line, a data line and a first body portion, the first reference signal line is located between the first power supply signal line and the data line, and the first body portion is located between the first reference signal line and the data line; and the first light shielding portion is electrically connected to the first body portion, and the gate electrode of the drive transistor is electrically connected to the first body portion, so that the first light shielding portion is electrically connected to the gate electrode of the drive transistor.