Flexible display substrate and manufacturing method therefor, and display device

Patent metadata

Field	Value
Publication number	US-12464930-B2
Application number	US-202117763919-A
Country	US
Kind code	B2
Filing date	May 12, 2021
Priority date	Jun 15, 2020
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

Disclosed is a flexible display substrate, including: a substrate base layer, peripheral side edges of the substrate base layer having a first stepped structure having a process performance, the first stepped structure being configured to enable a film layer covering the first stepped structure to be easily broken at the stepped structure when a force is applied; a functional layer provided on the substrate base layer and exposed to the outside of the first stepped structure; and an inorganic encapsulation layer covering side edges of the functional layer and extending to the first stepped structure of the side edges of the substrate base layer.

First claim

What is claimed is:

1 . A flexible display substrate, comprising:
a substrate base layer, peripheral side edges of the substrate base layer having a first stepped structure with a process performance, and the first stepped structure being configured to enable a film layer covering the first stepped structure to be easily broken at the first stepped structure; a functional layer, located on the substrate base layer and exposing the first stepped structure; and an inorganic encapsulation layer, covering side edges of the functional layer and extending to the first stepped structure of the side edges of the substrate base layer, wherein the substrate base layer comprises a first-layer flexible substrate, a barrier layer, a second-layer flexible substrate, a buffer layer and an interlayer insulating layer which are sequentially provided; and the first stepped structure comprises first steps formed on edges of the barrier layer and the second-layer flexible substrate.

2 . The flexible display substrate according to claim 1 , wherein
the first stepped structure further comprises second steps formed on edges of the interlayer insulating layer and the buffer layer.

3 . A flexible display substrate comprising:
a substrate base layer, peripheral side edges of the substrate base layer having a first stepped structure with a process performance, and the first stepped structure being configured to enable a film layer covering the first stepped structure to be easily broken at the first stepped structure; a functional layer, located on the substrate base layer and exposing the first stepped structure; and an inorganic encapsulation layer, covering side edges of the functional layer and extending to the first stepped structure of the side edges of the substrate base layer; wherein the flexible display substrate is a stretchable flexible display substrate; the substrate base layer comprises a plurality of island parts, bridge parts connecting the plurality of island parts and hollowed-out parts located between the island parts and the bridge parts; a third stepped structure with a process performance is provided on side edges, at the hollowed-out parts, of the substrate base layer, and the third stepped structure is configured to enable a film layer covering the third stepped structure to be easily broken at the third stepped structure; the functional layer comprises pixel structures corresponding to the island parts, and each of the pixel structures is located on a corresponding island part; and the inorganic encapsulation layer covers a side edge of the each pixel structure and extends to the third stepped structure of the hollowed-out parts of the substrate base layer; wherein the substrate base layer comprises a flexible substrate, a barrier layer and a buffer layer which are sequentially provided; and the first stepped structure and the third stepped structure comprise first steps formed on edges of the barrier layer and the buffer layer.

4 . A display apparatus, comprising the flexible display substrate according to claim 1 .

5 . The flexible display substrate according to claim 1 , wherein the substrate base layer is provided with an opening hole, a second stepped structure with a process performance is provided on a side edge, at the opening hole, of the substrate base layer, and the second stepped structure is configured to enable a film layer covering the second stepped structure to be easily broken at the second stepped structure; and
the inorganic encapsulation layer covers a side edge, at the opening hole, of the functional layer, and extends to the second stepped structure at the opening hole of the substrate base layer.

6 . The flexible display substrate according to claim 5 , wherein the first stepped structure comprises one or more steps, and a step surface width of each of the one or more steps ranges from 5 μm to 25 μm.

7 . A flexible display substrate, comprising:
a substrate base layer, peripheral side edges of the substrate base layer having a first stepped structure with a process performance, and the first stepped structure being configured to enable a film layer covering the first stepped structure to be easily broken at the first stepped structure; a functional layer, located on the substrate base layer and exposing the first stepped structure; and an inorganic encapsulation layer, covering side edges of the functional layer and extending to the first stepped structure of the side edges of the substrate base layer; wherein the substrate base layer is of a plurality of layers of structures comprising a flexible substrate and an inorganic insulating layer; and the first stepped structure comprises steps formed by staggering edges of adjacent layers of structures in the plurality of layers of structures and/or steps formed on edges of at least one layer in the plurality of layers of structures; wherein the flexible display substrate is a stretchable flexible display substrate; the substrate base layer comprises a plurality of island parts, bridge parts connecting the plurality of island parts and hollowed-out parts located between the island parts and the bridge parts; a third stepped structure with a process performance is provided on side edges, at the hollowed-out parts, of the substrate base layer, and the third stepped structure is configured to enable a film layer covering the third stepped structure to be easily broken at the third stepped structure; the functional layer comprises pixel structures corresponding to the island parts, and each of the pixel structures is located on a corresponding island part; and the inorganic encapsulation layer covers a side edge of the each pixel structure and extends to the third stepped structure of the hollowed-out parts of the substrate base layer.

8 . The flexible display substrate according to claim 7 , wherein the first stepped structure comprises one or more steps, and a step surface width of each of the one or more steps ranges from 5 μm to 25 μm.

9 . The flexible display substrate according to claim 3 , wherein the third stepped structure at the hollowed-out parts is located on side edges of the island parts of the substrate base layer.

10 . The flexible display substrate according to claim 7 , wherein the third stepped structure at the hollowed-out parts is located on side edges of the island parts of the substrate base layer.

11 . A display apparatus, comprising the flexible display substrate according to claim 3 .

12 . A display apparatus, comprising the flexible display substrate according to claim 7 .

Assignees

• Boe Technology Group Co Ltd

Inventors

• Xue Jinxiang
• Zhang Xiaolei
• Sun Zhongyuan
• Liu Wenqi
• Sui Kai
• Ni Jingkai
• Zhou Xiang
• An Che
• Wang Guoqiang

Classifications

• H10K50/844

  Encapsulations · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K50/80

  Constructional details · CPC title

• H10K2102/311

  Flexible OLED · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title