US 12,324,343 B2
Top emitting display panels and display devices
Wenbin Jia, Beijing (CN); Feifei Zhu, Beijing (CN); and Xiang Wan, Beijing (CN)
Assigned to Hefei BOE Joint Technology Co., Ltd., Anhui (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/915,742
Filed by Hefei BOE Joint Technology Co., Ltd., Anhui (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Oct. 27, 2021, PCT No. PCT/CN2021/126749
§ 371(c)(1), (2) Date Sep. 29, 2022,
PCT Pub. No. WO2022/227452, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 202110467080.1 (CN), filed on Apr. 28, 2021.
Prior Publication US 2024/0215403 A1, Jun. 27, 2024
Int. Cl. H10K 59/80 (2023.01); H10K 59/35 (2023.01)
CPC H10K 59/876 (2023.02) [H10K 59/35 (2023.02); H10K 59/873 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A top emitting display panel, comprising:
a substrate;
a light-emitting structure located on the substrate, the light-emitting structure comprising:
a first light-emitting structure which has a first wavelength as a light emitting wavelength thereof,
a second light-emitting structure which has a second wavelength as a light emitting wavelength thereof, and
a third light-emitting structure which has a third wavelength as a light emitting wavelength thereof,
wherein the first wavelength is greater than the second wavelength, and the second wavelength is greater than the third wavelength;
a cover layer located on a side of the light-emitting structure away from the substrate and comprising at least two of a first region located on the first light-emitting structure, a second region located on the second light-emitting structure, and a third region located on the third light-emitting structure, wherein
the first region has a thickness such that twice of a length of an equivalent optical path in the first region along a thickness direction is an integer multiple of the first wavelength;
the second region has a thickness such that twice of the length of an equivalent optical path in the second region along the thickness direction is an integer multiple of the second wavelength; and
the third region has a thickness such that twice of a length of an equivalent optical path in the third region along the thickness direction is an integer multiple of the third wavelength.