Granted Patent B2

US 12,507,532 · App. 17/432,416 · Granted Dec 23, 2025

Inventors: Yu Wang (Beijing, CN); Kuanta Huang (Beijing, CN); Qing Wang (Beijing, CN); Yongfa Dong (Beijing, CN); Chao Yang (Beijing, CN); Shipeng Li (Beijing, CN); Hui Tong (Beijing, CN); Shangquan Shi (Beijing, CN); Xiong Yuan (Beijing, CN); Dongsheng Li (Beijing, CN); Xiaobin Shen (Beijing, CN)

Assignee: BOE TECHNOLOGY GROUP CO., LTD.

H10K59/122H10K59/80515H10K59/80521H10K59/1201H10K59/131

Abstract

Claims (20)

1 . A display panel, comprising:

a drive backplane, wherein the drive backplane comprises a planarization layer;

a first electrode layer, arranged on a surface of the drive backplane, and comprising a plurality of first electrodes distributed in an array, wherein the first electrode comprises a flat middle part and an edge part surrounding the middle part, the edge part comprises a horizontal part surrounding the middle part and a climbing part connected between the middle part and the horizontal part, and a thickness of the horizontal part is smaller than that of the middle part;

a leakage cut-off layer;

a light-emitting function layer, at least partially covering the middle part; and

a second electrode, covering the light-emitting function layer, and comprising a separating part and a plurality of flat parts separated by the separating part, wherein orthographic projections of the respective flat parts on the drive backplane are located within orthographic projections of the first electrodes in one-to-one correspondence, the separating part comprises a protruding area and first recessed areas connecting the protruding area and the flat parts, the first recessed areas are recessed toward a side of the flat parts close to the drive backplane, the protruding area protrudes toward a side of the flat parts facing away from the drive backplane, orthographic projections of the first recessed areas on the drive backplane are at least partially located outside orthographic projections of the middle parts of the first electrodes, and the first recessed areas are located above the leakage cut-off layer in a direction facing away from the drive backplane.

2 . The display panel according to claim 1 , wherein, on cross-sections perpendicular to the drive backplane, orthographic projections of lowest points of the first recessed areas on the drive backplane are located outside the orthographic projections of the middle parts of the first electrodes.

3 . The display panel according to claim 2 , wherein the first recessed area comprises a first side surface connected to the flat part and a second side surface connected to the protruding area, and the first side surface and the second side surface shrink along a direction close to the drive backplane.

4 . The display panel according to claim 3 , wherein a slope of the first side surface relative to the middle part is less than or equal to that of the second side surface relative to the middle part.

5 . The display panel according to claim 4 , wherein a minimum thickness of an area of the second electrode corresponding to the first side surface is greater than that of an area corresponding to the second side surface.

6 . The display panel according to claim 2 , wherein the protruding area has a second recessed area recessed toward the drive backplane, and a depth of the second recessed area is smaller than that of the first recessed area.

7 . The display panel according to claim 2 , wherein:

the leakage cut-off layer is provided on a same surface of the drive backplane with the first electrode layer, and the light-emitting function layer covers the leakage cut-off layer;

the leakage cut-off layer comprises a first defining layer and a second defining layer sequentially stacked in the direction facing away from the drive backplane, and both the first defining layer and the second defining layer at least partially expose the middle parts of the first electrodes, and an edge of an orthographic projection of the second defining layer on the drive backplane is located outside the orographic projections of the middle part; and

on a cross-section perpendicular to the drive backplane, the orthographic projection of the lowest point of the first recessed area on the drive backplane is located between orthographic projections of the middle part and the second defining layer on the drive backplane, and the orthographic projection of the second defining layer on the leakage cut-off-layer is located within an orthographic projection of the protruding area on the leakage cut-off layer.

8 . The display panel according to claim 2 , wherein:

the leakage cut-off layer comprises a first defining layer and a second defining layer, wherein the first defining layer and the first electrode layer are provided on a same surface of the drive backplane and have a plurality of openings, the respective first electrodes are arranged in the openings in one-to-one correspondence, and a space area exposing the drive backplane is formed between the edge part of each of the first electrodes and a sidewall of the opening where the first electrode is located;

the second defining layer covers the first defining layer and the drive backplane located in the space area, and at least partially exposes the middle part of the first electrode, the second defining layer is recessed toward the drive backplane in the space area and an area corresponding to the edge part, and a thickness of the second defining layer is smaller than that of the first defining layer; and

the light-emitting function layer covers the second defining layer.

9 . A display device, comprising the display panel according to claim 1 .

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (36)