US 12,219,824 B2
Display panel with grooves for reducing bending stress
Shuyuan Zhang, Wuhan (CN); and Jianfeng Chen, Wuhan (CN)
Assigned to Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Wuhan (CN)
Appl. No. 17/602,792
Filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Wuhan (CN)
PCT Filed Sep. 2, 2021, PCT No. PCT/CN2021/116192
§ 371(c)(1), (2) Date Oct. 11, 2021,
PCT Pub. No. WO2023/004928, PCT Pub. Date Feb. 2, 2023.
Claims priority of application No. 202110866483.3 (CN), filed on Jul. 29, 2021.
Prior Publication US 2024/0172489 A1, May 23, 2024
Int. Cl. H10K 59/124 (2023.01); H10K 59/131 (2023.01); H10K 102/00 (2023.01)
CPC H10K 59/124 (2023.02) [H10K 59/131 (2023.02); H10K 2102/311 (2023.02)] 14 Claims
OG exemplary drawing
 
1. A display panel comprising:
a base; and
a pixel driving circuit layer disposed on the base and comprising a plurality of pixel driving circuits;
wherein the pixel driving circuit layer comprises: a first semiconductor layer, a first insulating layer, and a second semiconductor layer stacked on the base; and
wherein the pixel driving circuit layer comprises first grooves located between the pixel driving circuits and opened in the first insulating layer, and a first organic spacer layer disposed in the first grooves;
wherein the display panel comprises a display area, and the first grooves comprise a plurality of first sub-grooves located in the display area and a plurality of second sub-grooves intersecting with the first sub-grooves, the plurality of the first sub-grooves and the plurality of the second sub-grooves divide the display area into a plurality of sub-areas, and at least one of the pixel driving circuits is disposed in each of the sub-areas;
wherein the display panel further comprises a bending wire area located at a side of the display area, a second insulating layer is disposed on the second semiconductor layer, and a first metal layer is disposed on the second insulating layer; and the pixel driving circuit layer comprises second grooves located in the bending wire area and penetrating at least the first insulating layer and the second insulating layer, and a second organic spacer layer disposed in the second grooves; and
wherein the display area and the bending wire area are arranged side by side along a first direction, and a plurality of third grooves are opened in the second organic spacer layer; and in the first direction, two adjacent third grooves are arranged in a wave shape, and the third grooves are filled with an inorganic spacer layer.