US 11,956,986 B2
Flexible display screen including encapsulation protection layer, flexible display device, and manufacturing method thereof
Yaming Wang, Beijing (CN); Liqiang Chen, Beijing (CN); Yanxin Wang, Beijing (CN); Chuntong Jiang, Beijing (CN); Jiali Wang, Beijing (CN); Xu Li, Beijing (CN); Rui Hou, Beijing (CN); and Le Chang, Beijing (CN)
Assigned to Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/427,618
Filed by Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Jan. 6, 2021, PCT No. PCT/CN2021/070488
§ 371(c)(1), (2) Date Jul. 30, 2021,
PCT Pub. No. WO2021/147675, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 202010075004.1 (CN), filed on Jan. 22, 2020.
Prior Publication US 2022/0102674 A1, Mar. 31, 2022
Int. Cl. H10K 50/84 (2023.01); H10K 50/80 (2023.01); H10K 59/38 (2023.01); H10K 59/40 (2023.01); H10K 71/00 (2023.01); H10K 77/10 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/84 (2023.02) [H10K 50/868 (2023.02); H10K 59/38 (2023.02); H10K 59/40 (2023.02); H10K 71/00 (2023.02); H10K 77/111 (2023.02); H10K 2102/311 (2023.02)] 17 Claims
OG exemplary drawing
 
1. A flexible display screen comprising: a flexible substrate; an OLED device layer disposed on the flexible substrate; an encapsulation layer, disposed on the OLED device layer and encapsulating the OLED device layer; and an encapsulation protection layer formed on the encapsulation layer, wherein the encapsulation protection layer is made of polyimide (PI), the encapsulation protection layer has a thickness of 10-25 um, and the encapsulation protection layer has an elastic modulus of 4000 MPa-14000 MPa, a ratio of a thickness of the encapsulation protection layer to a thickness of the flexible substrate is 1:2 to 1.25:1, the flexible substrate has a thickness of 20 um and an elastic modulus of 7000 MPa.