US 12,324,315 B2
Display panel and manufacturing method therefor, and display apparatus
Qingyu Huang, Beijing (CN); Zhiqiang Jiao, Beijing (CN); Huajie Yan, Beijing (CN); Fudong Chen, Beijing (CN); and Xiaohu Li, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/763,215
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed May 8, 2021, PCT No. PCT/CN2021/092387
§ 371(c)(1), (2) Date Mar. 24, 2022,
PCT Pub. No. WO2021/238621, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 202010460215.7 (CN), filed on May 27, 2020.
Prior Publication US 2024/0016006 A1, Jan. 11, 2024
Int. Cl. H10K 59/122 (2023.01); H10K 59/12 (2023.01); H10K 59/35 (2023.01); H10K 59/80 (2023.01)
CPC H10K 59/122 (2023.02) [H10K 59/1201 (2023.02); H10K 59/351 (2023.02); H10K 59/8791 (2023.02)] 14 Claims
OG exemplary drawing
 
1. A display panel having a plurality of sub-pixels wherein the display panel comprises:
a substrate;
a pixel defining layer, disposed on the substrate and comprising an opening area corresponding to each sub-pixel, wherein the pixel defining layer comprises M layers and among the M layers of pixel defining layer, an m-th layer of pixel defining layer encapsulates upper and side surfaces of an (m−1)-th layer of pixel defining layer, and a refractive index nm−1 of the (m−1)-th layer of pixel defining layer is greater than a refractive index nm of the m-th layer of pixel defining layer, and wherein M is a positive integer equal to or greater than 2 and 2≤m≤M;
a light emitting layer, disposed in the opening area, wherein the light emitting layer is in contact with a sidewall of an M-th layer of pixel defining layer, and light emitted from the light emitting layer comprises a first light incident into the pixel defining layer, and the first light is able to be totally reflected in the (m−1)-th layer of pixel defining layer, when the first light propagating in the (m−1)-th layer of pixel defining layer has an angle of incidence at the interface between the (m−1)-th layer of pixel defining layer and the m-th layer of pixel defining layer greater than a critical angle; and
a color film layer, disposed at a side of the light emitting layer away from the substrate,
wherein M=3, and a first layer of the pixel defining layer has a first refractive index n1, a second layer of the pixel defining layer has a second refractive index n2, and a third layer of the pixel defining layer has a third refractive index n3, wherein n1>n2>n3.