Patent ID: 11956988
Assignee: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A display substrate, comprising:
a base substrate with an encapsulation region and an edge region on a periphery of the encapsulation region, wherein the encapsulation region comprises a display region and a peripheral region surrounding the display region, and the edge region comprises a bonding region on at least one side of the base substrate;
a plurality of stacked inorganic film layers on a side of the base substrate;
a plurality of first grooves, at the edge region, spaced apart from each other in a direction distal from the encapsulation region, and extending along a periphery of the base substrate, wherein the plurality of first grooves run through at least one inorganic film layer of the plurality of stacked inorganic film layers, and orthographic projections of the plurality of first grooves on the base substrate have a non-overlapping region with the bonding region, and distances between the plurality of first grooves and the display region are larger than distances between the plurality of first grooves and an edge of the base substrate; and
an organic layer, covering the plurality of first grooves; wherein the at least one inorganic film layer between each two of adjacent first grooves forms a barrier portion; the plurality of stacked inorganic film layers further comprise a buffer layer comprising a first buffer pattern and a second buffer pattern;
wherein an orthographic projection of the first buffer pattern on the base substrate covers the encapsulation region and a part of the edge region, the second buffer pattern is in the edge region, a thickness of the first buffer pattern is greater than a thickness of the second buffer pattern, and a direction of the thickness of the first buffer pattern and a direction of the thickness of the second buffer pattern are both vertical to a bearing surface of the base substrate; and
wherein an orthographic projection of the organic layer on the buffer layer partially overlaps the second buffer pattern, and an orthographic projection of a side, distal from the encapsulation region, of the barrier portion, most distal from the encapsulation region, on the buffer layer overlaps a border line of the first buffer pattern and the second buffer pattern.