US 11,785,825 B2
Quantum dot-organic light emitting display panel and display device
Haitao Huang, Beijing (CN); Shi Shu, Beijing (CN); Qi Yao, Beijing (CN); Chuanxiang Xu, Beijing (CN); Zhao Cui, Beijing (CN); Lina Jing, Beijing (CN); Renquan Gu, Beijing (CN); and Yong Yu, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
Filed on Mar. 24, 2021, as Appl. No. 17/210,733.
Claims priority of application No. 202011022085.5 (CN), filed on Sep. 25, 2020.
Prior Publication US 2022/0102431 A1, Mar. 31, 2022
Int. Cl. H10K 59/38 (2023.01); H10K 50/854 (2023.01); H10K 50/856 (2023.01); H10K 50/86 (2023.01); H10K 59/12 (2023.01); H10K 102/00 (2023.01)
CPC H10K 59/38 (2023.02) [H10K 50/854 (2023.02); H10K 50/856 (2023.02); H10K 50/865 (2023.02); H10K 59/12 (2023.02); H10K 2102/331 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A display panel, having a plurality of sub-pixel areas in an array and comprising:
a base substrate;
a light emitting structure, disposed on a side of the base substrate, and comprising a plurality of light emitting devices in one-to-one correspondence with the plurality of sub-pixel areas;
an encapsulating layer, disposed on a side, facing away from the base substrate, of the light emitting structure; and
a pixel defining layer, disposed on a side, facing away from the base substrate, of the encapsulating layer;
wherein the pixel defining layer comprises:
a plurality of openings;
at least two sub-pixel defining layers, wherein each of the sub-pixel defining layers is provided with a pixel separator; wherein the pixel separator fences each of the plurality of openings, and defines the plurality of sub-pixel areas; in the at least two sub-pixel defining layers, a sectional shape of the pixel separator in the sub-pixel defining layer which is farthest away from the encapsulating layer comprises a regular trapezoid; and
a quantum dot color film layer, comprising a plurality of quantum dot color films arranged in corresponding openings;
wherein the at least two sub-pixel defining layers comprise a first sub-pixel defining layer closest to the encapsulating layer, and a second sub-pixel defining layer farthest away from the encapsulating layer; wherein
the first sub-pixel defining layer is provided with a first pixel separator, and a sectional shape of the first pixel separator comprises an inverted trapezoid or a rectangle; and the second sub-pixel defining layer is provided with a second pixel separator, and the sectional shape of the second pixel separator comprises a regular trapezoid;
wherein the display panel further compries:
a first reflective structure covering the first pixel separator, wherein a material of the first reflective structure is metal; and
a second graphene layer covering the first pixel separator, the second pixel separator and the plurality of openings, wherein the second graphene layer is provided with an active functional group which can be tightly anchored to the quantum dot color film layer through hydrogen bonds.