US 12,342,713 B2
Flexible display panel having a bending area located between a display area and a bonding area and manufacturing method therefor, and display device
Longhui Xue, Beijing (CN); Weiyun Huang, Beijing (CN); Wei Zhang, Beijing (CN); Mingqiang Wang, Beijing (CN); and Quan Shi, Beijing (CN)
Assigned to CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Sichuan (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/779,385
Filed by CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Sichuan (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed May 28, 2021, PCT No. PCT/CN2021/096873
§ 371(c)(1), (2) Date May 24, 2022,
PCT Pub. No. WO2021/239127, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 202010473799.1 (CN), filed on May 29, 2020.
Prior Publication US 2022/0406880 A1, Dec. 22, 2022
Int. Cl. H10K 77/10 (2023.01); H10K 50/844 (2023.01); H10K 59/121 (2023.01); H10K 59/131 (2023.01); H10K 59/80 (2023.01); H10K 59/12 (2023.01); H10K 71/00 (2023.01); H10K 102/00 (2023.01)
CPC H10K 77/111 (2023.02) [H10K 50/844 (2023.02); H10K 59/1213 (2023.02); H10K 59/131 (2023.02); H10K 59/1315 (2023.02); H10K 59/873 (2023.02); H10K 59/1201 (2023.02); H10K 71/00 (2023.02); H10K 2102/311 (2023.02)] 17 Claims
OG exemplary drawing
 
1. A flexible display panel having a display area, a bonding area and a bending area located between the display area and the bonding area; wherein
the flexible display panel comprises:
a flexible substrate including a first surface and a second surface arranged opposite to each other;
pixel driving circuits located on the first surface, wherein signal leads electrically connected to the pixel driving circuits pass through the bending area from the display area and extend to the bonding area, and in the pixel driving circuits, at least one pattern layer made of an inorganic material and located between the signal leads and the flexible substrate passes through the bending area from the display area and extends to the bonding area;
a first organic material layer including at least one of a first planarization layer, a second planarization layer, a pixel defining layer or an organic encapsulation film that are sequentially away from the first surface of the flexible substrate;
a second organic material layer disposed on a side of the signal leads away from the first surface and located at the bending area, the second organic material layer including a cover layer; and
a groove disposed in a film layer away from the signal leads and located on a side where the second surface is located, the groove being located between the display area and the bonding area; wherein
a ratio of a thickness of the second organic material layer to a distance between a bottom of the groove and the first surface of the flexible substrate is in a range of 1:1 to 7:1, inclusive;
the second organic material layer further includes an anti-bending layer located on a side of the cover layer away from the flexible substrate; and an included angle between a side surface of the anti-bending layer and a surface of the anti-bending layer proximate to the flexible substrate is greater than or equal to 20 degrees and less than 90 degrees; the first organic material layer is separated from the second organic material layer; an orthographic projection of the second organic material layer on the flexible substrate is located within an orthographic projection of the signal leads on the flexible substrate.