US 12,278,228 B2
Flexible display panel and sliding and rolling display apparatus
Hong Zhu, Beijing (CN); and Lu Liu, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/927,609
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Nov. 2, 2021, PCT No. PCT/CN2021/128238
§ 371(c)(1), (2) Date Nov. 23, 2022,
PCT Pub. No. WO2022/252493, PCT Pub. Date Dec. 8, 2022.
Claims priority of application No. 202110605564.8 (CN), filed on May 31, 2021.
Prior Publication US 2024/0258289 A1, Aug. 1, 2024
Int. Cl. H01L 25/16 (2023.01); H01L 27/15 (2006.01); H01L 33/52 (2010.01); H01L 33/58 (2010.01)
CPC H01L 25/167 (2013.01) [H01L 27/156 (2013.01); H01L 33/52 (2013.01); H01L 33/58 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A flexible display panel, having a display area, a bezel area disposed around the display area and a sliding and rolling connection area connected to a first border of the bezel area away from the display area;
the flexible display panel comprising:
a base substrate covering at least the display area and the bezel area;
one or more inorganic insulating layers located on a side of the base substrate, wherein a total thickness of a portion of the one or more inorganic insulating layers located in the sliding and rolling connection area is less than a total thickness of a portion of the one or more inorganic insulating layers located in the display area;
a display functional layer located on the side of the base substrate; and
an encapsulation layer located on a side of the display functional layer away from the base substrate, the encapsulation layer being configured to encapsulate the display functional layer on the base substrate;
wherein the display functional layer and the encapsulation layer include at least one inorganic insulating layer of the one or more inorganic insulating layers, and the at least one inorganic insulating layer is located only on a side of the first border proximate to the display area; and
the base substrate covers the display area and the bezel area without covering the sliding and rolling connection area; and the flexible display panel further comprises:
a level difference filling layer contiguous with both of the base substrate and the encapsulation layer, wherein the level difference filling layer covers the sliding and rolling connection area.