# US 2021/0343984 A1 · Display panel

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- Number: US 2021/0343984 A1
- Document ID: US20210343984A1
- Status: Published application
- Kind: A1
- Application number: 16/624,126
- Filed: 2019-09-24
- Published: 2021-11-04
- Earliest claimed: 2019-06-26
- Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Inventors: Kun Wang
- Web page: https://patentgrep.com/patent/US20210343984A1

## CPC

- H10K 59/124: Insulating layers formed between TFT elements and OLED elements
- H10K 59/873: {Encapsulations}
- H10K 2102/311: {Flexible OLED}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display panel is provided. A side surface of an interlayer insulating layer away from the substrate is partially recessed to a substrate so as to form a first groove. A crack preventing member is filled in the first groove and is connected to the substrate, so a connection of the organic layer to the organic layer is achieved, thereby increasing a bending resistance of the display panel and reducing the risk of film peeling. In addition, a side surface of the interlayer insulating layer disposed between the first groove and the banks away from the substrate is partially recessed to form a second groove, and the first inorganic packaging layer is filled in the second groove. An inorganic layer of the packaging layer is connected to an inorganic layer of an array substrate, thereby increasing a bending resistance of the display panel and reducing the risk of film peeling.

## Claims

### Claim 1

A display panel, comprising:
a substrate;
a buffer layer, wherein the buffer layer is disposed on the substrate;
an insulating layer, wherein the insulating layer is disposed on the buffer layer;
an interlayer insulating layer, wherein the interlayer insulating layer is disposed on the insulating layer, and a side surface of the interlayer insulating layer away from the substrate is partially recessed to form a first groove;
a crack preventing member, wherein the crack preventing member is filled in the first groove and covers the interlayer insulating layer;
banks, wherein the banks are spaced apart from each other on the interlayer insulating layer between two first grooves;
a first inorganic packaging layer, wherein the first inorganic packaging layer covers the interlayer insulating layer;
a second inorganic packaging layer, wherein the second inorganic packaging layer covers the first inorganic packaging layer; and
an organic layer, wherein the organic layer covers the second inorganic packaging layer.

### Claim 2 (depends on 1)

The display panel according to claim 1, wherein a side surface of the interlayer insulating layer disposed between the first groove and the banks away from the substrate is partially recessed to form a second groove, and the first inorganic packaging layer is filled in the second groove and covers the interlayer insulating layer.

### Claim 3 (depends on 1)

The display panel according to claim 1, wherein a side of the first inorganic packaging layer away from the substrate is partially recessed to form a third groove, and the second inorganic packaging layer is filled in the third groove and covers the first inorganic packaging layer.

### Claim 4 (depends on 1)

The display panel according to claim 1, wherein the first groove is recessed to penetrate through the insulating layer and the buffer layer up to the substrate.

### Claim 5 (depends on 1)

The display panel according to claim 1, wherein the first groove comprises a plurality of first sub-grooves spaced apart from each other, a distance between the first sub-grooves ranges from 1 to 10 μm, and a width of the first sub-groove ranges from 1 to 1-10 μm.

### Claim 6 (depends on 5)

The display panel according to claim 5, wherein a depth of the first sub-groove is less than the width of the first sub-groove.

### Claim 7 (depends on 2)

The display panel according to claim 2, wherein a bottom of the second groove is disposed on a side surface of the buffer layer facing the substrate.

### Claim 8 (depends on 2)

The display panel according to claim 2, wherein the second groove comprises a plurality of second sub-grooves spaced apart from each other, a distance between the second sub-grooves ranges from 1 to 20 μm, and a width of the second sub-groove ranges from 1 to 1-20 μm.

### Claim 9 (depends on 8)

The display panel according to claim 8, wherein a depth of the second sub-groove is less than the width of the second sub-groove.

### Claim 10 (depends on 2)

The display panel according to claim 2, wherein the crack preventing member is connected to the bank, and a side surface of the crack preventing member away from the substrate is partially recessed to form the second groove.