US 12,446,427 B2
Display substrate and manufacturing method therefor, display panel, and display device
Li Sun, Beijing (CN); Zhongyuan Wu, Beijing (CN); Pan Xu, Beijing (CN); Hongli Wang, Beijing (CN); Kaihong Ma, Beijing (CN); and Huaiting Shih, Beijing (CN)
Assigned to Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 18/022,525
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Mar. 17, 2022, PCT No. PCT/CN2022/081465
§ 371(c)(1), (2) Date Feb. 22, 2023,
PCT Pub. No. WO2023/273423, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 202110736015.4 (CN), filed on Jun. 30, 2021.
Prior Publication US 2024/0040897 A1, Feb. 1, 2024
Int. Cl. H10K 59/10 (2023.01); H10K 59/12 (2023.01); H10K 59/80 (2023.01); H10K 71/00 (2023.01)
CPC H10K 59/221 (2023.02) [H10K 59/1201 (2023.02); H10K 59/80517 (2023.02); H10K 71/00 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A display substrate, comprising a driving circuit layer provided on a base substrate and a light emitting structure layer provided on a side of the driving circuit layer away from the base substrate, wherein the driving circuit layer comprises a pixel driving circuit, the light emitting structure layer comprises an organic light emitting diode (OLED) device connected with the pixel driving circuit, the OLED device comprises an anode, a light emitting functional layer, and a cathode stacked sequentially, and the light emitting functional layer comprises a plurality of film layers which are stacked;
the light emitting structure layer comprises an anode layer, a first film layer group, and a second film layer group stacked sequentially, wherein the anode layer comprises one or more anodes, the first film layer group comprises at least one film layer of the light emitting functional layer, and the second film layer group comprises at least one film layer of the light emitting functional layer and the cathode;
an orthographic projection of the second film layer group on the base substrate contains an orthographic projection of the first film layer group on the base substrate, an overlapping portion of all film layers in the first film layer group serves as a first portion of the first film layer group, an orthographic projection region of a part of the first portion of the first film layer group covering a surface of the anode and directly contacting the surface of the anode on the base substrate is a light emitting region of the display substrate, and an orthographic projection region of a portion of the second film layer group that is not overlapped with the first portion of the first film layer group on the base substrate is configured not to emit light;
a distance between an edge of the first film layer group and an edge of the second film layer group is different at a plurality of positions.