US 12,446,455 B2
Flexible display panel
Zhao Li, Beijing (CN); Pao Ming Tsai, Beijing (CN); and Shiming Shi, Beijing (CN)
Assigned to BEIJING BOE TECHNOLOGY CO., LTD., Beijing (CN)
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Filed on Aug. 18, 2021, as Appl. No. 17/405,873.
Application 17/405,873 is a continuation in part of application No. 15/764,580, granted, now 11,127,319, previously published as PCT/CN2017/097064, filed on Aug. 11, 2017.
Claims priority of application No. 201710094071.6 (CN), filed on Feb. 21, 2017.
Prior Publication US 2021/0376270 A1, Dec. 2, 2021
Int. Cl. H10K 77/10 (2023.01); H10K 50/844 (2023.01); H10K 50/86 (2023.01); H10K 59/40 (2023.01); H10K 59/80 (2023.01); H10K 71/00 (2023.01); H10K 102/00 (2023.01)
CPC H10K 77/111 (2023.02) [H10K 50/844 (2023.02); H10K 50/86 (2023.02); H10K 59/40 (2023.02); H10K 59/873 (2023.02); H10K 59/8791 (2023.02); H10K 71/00 (2023.02); H10K 2102/311 (2023.02)] 17 Claims
OG exemplary drawing
 
1. A flexible display panel, comprising:
a flexible substrate;
a flexible display screen on the flexible substrate;
a protection film disposed at a side of the flexible display screen away from the flexible substrate; and
at least one optical clear adhesive layer between the flexible display screen and the protection film,
wherein the flexible display panel further comprises a circular polarizer, and the circular polarizer is disposed on a side of the flexible display screen away from the flexible substrate,
the flexible display panel is a flexible organic light-emitting display panel,
the circular polarizer is between the flexible display screen and the at least one optical clear adhesive layer, and
the protection film comprises at least one inorganic material film,
wherein a stress neutral layer of the flexible display panel is between the flexible display screen and the circular polarizer, and the stress neutral layer is a plane formed by all positions where internal tangential stress is zero in case of the flexible display panel being bent and deformed.