Patent ID: 11963435
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A flexible display panel, comprising:
a flexible base substrate comprising a display region, a non-display region, and a bendable region;
an isolation buffer layer on the flexible base substrate;
a trench penetrating the isolation buffer layer in the bendable region;
a first buffer layer in the trench;
lead wires on the isolation buffer layer of the non-display region and the first buffer layer; and
a second buffer layer disposed on the lead wires and covering at least the bendable region;
wherein the bendable region is located between the display region and the non-display region, the display region is provided with an array of sub-pixels and signal lines, and the non-display region is provided with a driving chip;
the lead wires provide connections between the signal lines and the driving chip;
the trench includes a bottom surface, and a first side surface and a second side surface located on both sides of the bottom surface respectively and connected to the bottom surface;
a thickness of the first buffer layer in a direction perpendicular to the flexible base substrate is lower than a depth of the trench;
each of the first side surface and the second side surface comprises two sloped surfaces and a step surface between the two sloped surfaces, and an angle of each of the two sloped surfaces is less than 90 degrees; and
the first buffer layer covers the two sloped surfaces and the step surface to form a smooth side surface in the trench.