# US 2025/0160184 A1 · Display device

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- Number: US 2025/0160184 A1
- Document ID: US20250160184A1
- Status: Published application
- Kind: A1
- Application number: 18/915,002
- Filed: 2024-10-14
- Published: 2025-05-15
- Earliest claimed: 2023-11-14
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Howon CHOI
- Web page: https://patentgrep.com/patent/US20250160184A1

## CPC

- H10K 59/879: {comprising refractive means, e.g. lenses}
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/124: Insulating layers formed between TFT elements and OLED elements
- H10K 59/80515: {characterised by their shape}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

Embodiments of the present disclosure relate to a display device. By including a first electrode layer which is disposed on a passivation layer including at least one hole in an emitting area and is located in an area other than the at least one hole or by including a first electrode layer including an upper electrode layer and a lower electrode layer which is located under the upper electrode layer, it is possible to provide a display device capable of improving light extraction efficiency.

## Claims

### Claim 1

A display device, comprising:
a substrate including an emitting area and a non-emitting area;
an overcoat layer disposed on the substrate;
a passivation layer disposed on the overcoat layer, and including at least one hole in the emitting area;
a first electrode layer disposed on an upper surface of the passivation layer, and located in an area other than the at least one hole;
a light emitting layer disposed on the first electrode layer, and covering the overcoat layer and the passivation layer in the at least one hole; and
a second electrode layer disposed on the light emitting layer.

### Claim 2 (depends on 1)

The display device of claim 1, wherein a thickness of the passivation layer is greater than a thickness of the first electrode layer.

### Claim 3 (depends on 1)

The display device of claim 1, further comprising:
a contact part passing through the passivation layer and the overcoat layer; and
a bank layer disposed on the first electrode layer and filling the contact part,
wherein:
a connection pattern is disposed on the substrate; and
the first electrode layer and the connection pattern are for being electrically connected in the contact part.

### Claim 4 (depends on 1)

The display device of claim 1, further comprising:
a contact part passing through the passivation layer and the overcoat layer,
wherein a connection pattern is disposed on the substrate,
wherein the first electrode layer and the connection pattern are for being electrically connected in the contact part, and
wherein the light emitting layer and the second electrode layer are disposed according to a shape of the first electrode layer in the contact part.

### Claim 5 (depends on 4)

The display device of claim 4, wherein the overcoat layer is configured by at least two layers.

### Claim 6 (depends on 1)

The display device of claim 1, wherein
the overcoat layer includes at least one concave part which is configured by a flat portion and a sloped portion surrounding the flat portion, and
the passivation layer covers the sloped portion, and overlaps at least a partial area of the flat portion.

### Claim 7 (depends on 6)

The display device of claim 6, further comprising:
a contact part passing through the passivation layer and the overcoat layer; and
a bank layer disposed on the first electrode layer and filling the contact part,
wherein:
a connection pattern is disposed on the substrate; and
the first electrode layer and the connection pattern are for being electrically connected in the contact part.

### Claim 8

A display device, comprising:
a substrate including an emitting area and a non-emitting area;
an overcoat layer disposed on the substrate;
a first electrode layer disposed on the overcoat layer, having at least one hole in the emitting area, and including an upper electrode layer and a lower electrode layer which is located under the upper electrode layer;
a light emitting layer disposed on the first electrode layer, and covering the overcoat layer and the first electrode layer in the at least one hole; and
a second electrode layer disposed on the light emitting layer.

### Claim 9 (depends on 8)

The display device of claim 8, wherein a thickness of the lower electrode layer is less than a thickness of the upper electrode layer.

### Claim 10 (depends on 8)

The display device of claim 8, wherein an etch rate of the lower electrode layer is higher than an etch rate of the upper electrode layer.

### Claim 11 (depends on 10)

The display device of claim 10, wherein the upper electrode layer comprises indium tin oxide (ITO), and the lower electrode layer comprises at least one selected among transparent conductive oxide or translucent metal with a higher etch rate than the ITO.

### Claim 12 (depends on 10)

The display device of claim 10, further comprising:
a contact part passing through the overcoat layer; and
a bank layer disposed on the first electrode layer and filling the contact part,
wherein:
a connection pattern is disposed on the substrate; and
the first electrode layer and the connection pattern are for being electrically connected in the contact part.

### Claim 13 (depends on 10)

The display device of claim 10, further comprising:
a contact part passing through the overcoat layer,
wherein a connection pattern is disposed on the substrate,
wherein the first electrode layer and the connection pattern are for being electrically connected in the contact part, and
wherein the light emitting layer and the second electrode layer are disposed according to a shape of the first electrode layer in the contact part.

### Claim 14 (depends on 13)

The display device of claim 13, wherein the overcoat layer is configured by at least two layers.

### Claim 15 (depends on 10)

The display device of claim 10, wherein
the overcoat layer includes at least one concave part which is configured by a flat portion and a sloped portion surrounding the flat portion, and
the lower electrode layer covers the sloped portion, and overlaps at least a partial area of the flat portion.

### Claim 16 (depends on 15)

The display device of claim 15, further comprising:
a contact part passing through the overcoat layer; and
a bank layer disposed on the first electrode layer and filling the contact part,
wherein:
a connection pattern is disposed on the substrate; and
the first electrode layer and the connection pattern are for being electrically connected in the contact part.

### Claim 17

A display device, comprising:
a substrate;
an overcoat layer disposed on the substrate;
a passivation layer disposed on the overcoat layer, and including at least one hole exposing a partial upper surface of the overcoat layer;
a first electrode layer disposed on an upper surface of the passivation layer, and exposing the at least one hole;
a light emitting layer disposed on the first electrode layer and in the at least one hole; and
a second electrode layer disposed on the light emitting layer.