# US 11,309,362 B2 · Display panel, display apparatus, and manufacturing method thereof

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- Number: US 11,309,362 B2
- Document ID: US11309362B2
- Status: Granted
- Kind: B2
- Application number: 16/346,229
- Filed: 2018-10-19
- Published: 2021-11-18
- Granted: 2022-04-19
- Earliest claimed: 2018-04-17
- Assignees: Boe Technology Group Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.
- Inventors: Youwei Wang; Song Zhang; Peng Cai; Chunyan Xie; Huan Liu
- Web page: https://patentgrep.com/patent/US11309362B2

## CPC

- H10K 59/88: Dummy elements, i.e. elements having non-functional features
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 77/10: Substrates, e.g. flexible substrates
- H10K 59/1201: {Manufacture or treatment}
- H10K 71/851: {Division of substrate}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

The present disclosure relates to a display panel. The display panel may include a substrate. The substrate may include a display area, a dummy area inside the display area, and a boundary area between the dummy area and the display area on the substrate. The display substrate may further include an isolation protrusion on the substrate at the boundary area. The isolation protrusion may be configured to isolate a functional layer in the display area from the functional layer in the dummy area, and at least a side surface of the isolation protrusion facing the dummy area may be covered by an isolation inorganic layer.

## Claims

### Claim 1

A display substrate, comprising:
a substrate, including
a display area, a dummy area inside the display area, and a boundary area between the dummy area and the display area on the substrate; and
an isolation protrusion on the substrate at the boundary area;
wherein the isolation protrusion is configured to isolate a functional layer in the display area from the functional layer in the dummy area, and
at least a side surface of the isolation protrusion facing the dummy area is covered by an isolation inorganic layer.

### Claim 2 (depends on 1)

The display substrate of claim 1, wherein the functional layer comprises at least one of a light-emitting layer, a cathode, or a capping layer.

### Claim 3 (depends on 1)

The display substrate of claim 1, wherein the isolation inorganic layer is formed by atomic layer deposition.

### Claim 4 (depends on 1)

The display substrate of claim 1, wherein the isolation protrusion comprises a wall structure surrounding the dummy area.

### Claim 5 (depends on 1)

The display substrate of claim 1, wherein the isolation protrusion comprises a plurality of isolation columns surrounding the dummy area and a distance between two adjacent isolation columns is in a range of about 30 μm to about 100 μm.

### Claim 6 (depends on 1)

The display substrate of claim 1, wherein an orthographic projection of the lower half of the isolation protrusion on the substrate falls within an orthographic projection of the upper half of the isolation protrusion on the substrate.

### Claim 7 (depends on 1)

The display substrate of claim 1, wherein an area of a cross-section of the isolation protrusion in a plane parallel to the substrate increases along a direction away from the substrate.

### Claim 8 (depends on 1)

The display substrate of claim 1, wherein a cross-section of the isolation protrusion in a plane perpendicular to the substrate has an inverted trapezoidal structure.

### Claim 9 (depends on 1)

The display substrate of claim 1, wherein the isolation inorganic layer comprises silicon oxide or aluminum oxide and the isolation protrusion comprises a polyimide material.

### Claim 10 (depends on 1)

The display substrate of claim 1, wherein the isolation inorganic layer has a thickness in a range of about 10 nm to about 50 nm.

### Claim 11 (depends on 1)

The display substrate of claim 1, wherein the isolation inorganic layer extends into at least a part of the display area.

### Claim 12 (depends on 1)

The display substrate of claim 1, further comprising an encapsulation layer covering at least the display area and the boundary area, the encapsulation layer comprises a first inorganic layer, an organic layer, and a second inorganic layer, the first inorganic layer covers at least the display area and the boundary area, the organic layer covers at least the display area, and the second inorganic layer covers at least the display area and the boundary area, and an orthographic projection of the organic layer falls within an orthographic projection of the first inorganic layer and an orthographic projection of the second inorganic layer.

### Claim 13 (depends on 1)

The display substrate according to claim 1, wherein the dummy area includes a hole, and a shortest distance from an edge of the hole to an edge of the display area is in a range of about 0.5 mm to about 2 mm.

### Claim 14 (depends on 1)

A display apparatus, comprising the display substrate according to claim 1, wherein the dummy area is configured to install at least one selected from a group consisting of a camera, a sensor, and a physical button.

### Claim 15

A method of manufacturing a display apparatus, comprising:
forming an isolation protrusion on a substrate of the display apparatus, the isolation protrusion being configured to isolate a display area from a dummy area inside the display area of the display apparatus;
forming an isolation inorganic layer on a surface of the isolation protrusion facing the dummy area; and
forming a functional layer in the display area and the dummy area respectively,
wherein the isolation protrusion isolates the functional layer in the display area from the functional layer in the dummy area.

### Claim 16 (depends on 15)

The method of claim 15, further comprising forming an encapsulation layer on the functional layer of the display area and the functional layer of the non-display area, the encapsulation layer comprising a first inorganic layer, an organic layer, and a second inorganic layer,
wherein the first inorganic layer covers at least the display area and the boundary area, the organic layer covers at least the display area, and the second inorganic layer covers at least the display area and the boundary area, and an orthographic projection of the organic layer falls within an orthographic projection of the first inorganic layer and an orthographic projection of the second inorganic layer.

### Claim 17 (depends on 16)

The method of claim 16, wherein the first inorganic layer is formed by a chemical vapor deposition technique, the organic layer is formed by an ink-jet printing technique, and the second inorganic layer is formed by a chemical vapor deposition technique.

### Claim 18 (depends on 15)

The method of claim 15, further comprising forming a hole in the dummy area by laser or mechanical force.

### Claim 19 (depends on 18)

The method of claim 18, further comprising installing a sensor, a camera, or a physical button in the hole.

### Claim 20 (depends on 15)

The method of claim 15, wherein the functional layer is formed in the display area and the dummy area respectively by an evaporation deposition technique.