US 11,818,911 B2
Display substrate and manufacturing method thereof, display panel and display apparatus
Feng Liao, Beijing (CN); Yunsik Im, Beijing (CN); Yoonsung Um, Beijing (CN); Shunhang Zhang, Beijing (CN); Liwei Liu, Beijing (CN); Hongrun Wang, Beijing (CN); Hui Zhang, Beijing (CN); Yue Jia, Beijing (CN); and Kai Hou, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 16/973,161
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Mar. 4, 2020, PCT No. PCT/CN2020/077749
§ 371(c)(1), (2) Date Dec. 8, 2020,
PCT Pub. No. WO2020/177711, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 201910168089.5 (CN), filed on Mar. 6, 2019.
Prior Publication US 2021/0257580 A1, Aug. 19, 2021
Int. Cl. H10K 50/822 (2023.01); H01L 25/18 (2023.01); H01L 25/16 (2023.01); H10K 50/826 (2023.01); H10K 59/13 (2023.01); H10K 59/60 (2023.01); H01L 27/144 (2006.01); H10K 59/122 (2023.01); H10K 59/12 (2023.01)
CPC H10K 50/822 (2023.02) [H01L 25/167 (2013.01); H01L 25/18 (2013.01); H10K 50/826 (2023.02); H10K 59/13 (2023.02); H10K 59/60 (2023.02); H01L 27/1443 (2013.01); H10K 59/1201 (2023.02); H10K 59/122 (2023.02)] 16 Claims
OG exemplary drawing
 
1. A display substrate, comprising a substrate and a plurality of electroluminescent layers on the substrate, wherein
the display substrate further comprises a first reflective electrode layer, a buffer layer and a second reflective electrode layer in direct contact with the buffer layer on a side of at least one of the plurality of electroluminescent layers distal to the substrate;
the buffer layer is provided with a first opening extending along a thickness direction of the buffer layer as a first hollow region, the second reflective electrode layer is provided with a second opening extending along a thickness direction of the second reflective electrode layer as a second hollow region, the first opening is communicated with the second opening, and an overlapping region between the first hollow region and the second hollow region is configured to transmit light emitted by the electroluminescent layer, and
an orthographic projection of the at least one of the plurality of electroluminescent layers on the substrate covers an orthographic projection of the overlapping region on the substrate;
wherein the first reflective electrode layer has a thickness of 200 Å-1000 Å:
wherein a material of the first reflective electrode layer comprises one of ITO-Cs, Li3PO3/Al, MgAg, LiAl, Ca/Ag, Ag/Al, and Ba/Al/ITO; and
wherein an area of the orthographic projection of the overlapping region on the substrate is 5% to 30% of an area of the orthographic projection of the electroluminescent layer on the substrate.