# US 11,309,519 B2 · Display panel, manufacturing method thereof, and display apparatus

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- Number: US 11,309,519 B2
- Document ID: US11309519B2
- Status: Granted
- Kind: B2
- Application number: 16/611,246
- Filed: 2019-03-22
- Published: 2021-10-28
- Granted: 2022-04-19
- Earliest claimed: 2018-11-16
- Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Applicants: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd.
- Inventors: Xiangdan Dong; Youngyik Ko; Ming Hu; Weiyun Huang
- Web page: https://patentgrep.com/patent/US11309519B2

## CPC

- H10K 77/111: {Flexible substrates}
- H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers}
- H10K 59/1201: {Manufacture or treatment}
- H10K 2102/311: {Flexible OLED}
- Y02E 10/549: Organic PV cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present disclosure relates to a display panel comprising a display area. The display area may include a substrate having a third opening, a thin film transistor layer on a side of the substrate, a light emitting layer on a side of the thin film transistor layer opposite from the substrate, and an encapsulation layer on a side of the light emitting layer opposite from the substrate. The thin film transistor layer may have a first opening to expose the third opening and the encapsulation layer may have a second opening to expose the third opening. Orthographic projection of the second opening on the substrate may cover orthographic projection of the third opening on the substrate.

## Claims

### Claim 1

A display panel comprising a display area, the display area comprising:
a substrate having a third opening;
a thin film transistor layer on a side of the substrate, the thin film transistor layer having a first opening to expose the third opening;
a light emitting layer on a side of the thin film transistor layer opposite from the substrate; and
an encapsulation layer on a side of the light emitting layer opposite from the substrate, the encapsulation layer having a second opening to expose the third opening,
wherein the encapsulation layer covers side surfaces of the thin film transistor layer facing the second opening;
orthographic projection of the first opening on the substrate covers the orthographic projection of the second opening on the substrate, and an area of the orthographic projection of the first opening on the substrate is greater than an area of the orthographic projection of the second opening on the substrate; and
the orthographic projection of the second opening on the substrate covers orthographic projection of the third opening on the substrate and an area of the orthographic projection of the second opening on the substrate is greater than an area of the orthographic projection of the third opening on the substrate.

### Claim 2 (depends on 1)

The display panel of claim 1, wherein the encapsulation layer further covers side surfaces of the light emitting layer facing the second opening and the first opening formed in the light emitting layer and the thin film transistor layer has a same diameter.

### Claim 3 (depends on 1)

The display panel of claim 1, wherein at least one dam surrounding the third opening is provided on a side of the thin film transistor layer opposite from the substrate; and
at least a portion of the light emitting layer is located on a side of the at least one dam opposite from the third opening.

### Claim 4 (depends on 3)

The display panel of claim 3, wherein the at least one dam includes a first dam and a second dam located on a side of the first dam opposite from the third opening.

### Claim 5 (depends on 4)

The display panel of claim 4, wherein a height of the first dam is greater than a height of the second dam.

### Claim 6 (depends on 5)

The display panel of claim 5, wherein the light emitting layer comprises a first portion covering a side surface of the second dam opposite from the third opening and a surface of a portion of the thin film transistor layer on a side of the second dam opposite from the third opening.

### Claim 7 (depends on 5)

The display panel of claim 5, wherein the light emitting layer comprises a first portion covering a surface of a portion of the thin film transistor layer on a side of the second dam opposite from the third opening.

### Claim 8 (depends on 6)

The display panel of claim 6, wherein the light emitting layer further comprises a second portion covering at least a portion of surfaces of the first dam and the second dam.

### Claim 9 (depends on 8)

The display panel of claim 8, wherein the second portion further covers a surface of a portion of the thin film transistor layer on a side of the first dam facing the third opening.

### Claim 10 (depends on 6)

The display panel of claim 6, wherein the second portion is contiguous with the first portion.

### Claim 11 (depends on 1)

A display apparatus, comprising the display panel according to claim 1.

### Claim 12 (depends on 11)

The display apparatus of claim 11, further comprising a camera disposed in the third opening.

### Claim 13

A method of manufacturing a display panel, comprising forming a display area, the forming the display area comprising:
providing a substrate;
forming a thin film transistor layer on a side of the substrate, the thin film transistor layer having a first opening exposing a portion of the substrate;
forming a light emitting layer on a side of the thin film transistor layer opposite from the substrate;
forming an encapsulation layer covering the light emitting layer and the thin film transistor layer, the encapsulation layer having a second opening exposing at least a portion of the exposed portion of the substrate; and
forming a third opening penetrating the exposed portion of the substrate,
wherein orthographic projection of the second opening on the substrate covers orthographic projection of the third opening on the substrate.

### Claim 14 (depends on 13)

The method of manufacturing a display panel of claim 13, wherein orthographic projection of the first opening on the substrate covers the orthographic projection of the second opening on the substrate, and an area of the orthographic projection of the first opening on the substrate is greater than an area of the orthographic projection of the second opening on the substrate.

### Claim 15 (depends on 13)

The method of manufacturing a display panel of claim 13, before forming the light emitting layer and the encapsulation layer, further comprising:
forming at least one dam located on a side of the thin film transistor layer opposite from the substrate;
wherein at least a portion of the light emitting layer is located on a side of the at least one dam opposite from the first opening.

### Claim 16 (depends on 15)

The method of manufacturing a display panel of claim 15, wherein the forming the light emitting layer and the encapsulation layer comprises:
depositing a layer of light emitting material after forming the at least one dam;
forming a first inorganic material layer on a side of the layer of the light emitting material opposite from the substrate;
performing an etching process to remove portions of the layer of the light emitting material and the first inorganic material layer in the first opening;
forming an organic material layer on a side of the at least one dam opposite from the first opening and on a side of the remaining portion of the first inorganic material layer opposite from the substrate; and
forming a second inorganic material layer covering the organic material layer, the layer of the light emitting material, and the at least one dam,
wherein the second inorganic material layer has an opening the same as the second opening.

### Claim 17 (depends on 16)

The method of manufacturing a display panel of claim 16, wherein the etching process is performed to further remove portions of the layer of the light emitting material and the first inorganic material layer except those located at a side of the second dam opposite from the first opening.

### Claim 18 (depends on 15)

The method of manufacturing a display panel of claim 15, wherein the at least one dam comprises a first dam and a second dam located on a side of the first dam opposite from the first opening.

### Claim 19 (depends on 18)

The method of manufacturing a display panel of claim 18, wherein a height of the first dam is greater than a height of the second dam.

### Claim 20 (depends on 1)

The display panel of claim 1, wherein the encapsulation layer includes a first inorganic material layer, an organic material layer on the first inorganic material layer, and a second inorganic material layer on the organic material layer; and
a height of the organic material layer is lower than a height of the at least one dam.