# US 11,910,634 B2 · Display device and manufacturing method thereof

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,910,634 B2
- Document ID: US11910634B2
- Status: Granted
- Kind: B2
- Application number: 17/535,117
- Filed: 2021-11-24
- Published: 2022-06-30
- Granted: 2024-02-20
- Earliest claimed: 2020-12-31
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Daeil Kang; Joungwon Woo; Soojin Kim; Samjong Lee; Dojoong Kim
- Web page: https://patentgrep.com/patent/US11910634B2

## CPC

- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 50/16: Electron transporting layers
- H10K 59/80522: {combined with auxiliary electrodes}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display device can include a substrate having a light emitting area and a non-light emitting area; an anode electrode disposed in the light emitting area; a metal layer disposed in the non-light emitting area and connected to a first driving power; an auxiliary electrode disposed on the metal layer and including at least one electrode hole exposing the metal layer; a bank disposed on an edge region of the anode electrode and an edge region of the auxiliary electrode; a light emitting layer disposed on a region of the anode electrode exposed by the bank; an electron transport layer disposed on the light emitting layer and the auxiliary electrode; and a cathode electrode disposed on the electron transport layer, in which the electron transport layer is in direct contact with the metal layer through the at least one electrode hole.

## Claims

### Claim 1

A display device comprising:
a substrate including a light emitting area and a non-light emitting area;
an anode electrode disposed in the light emitting area;
a metal layer disposed in the non-light emitting area and connected to a first driving power;
an auxiliary electrode disposed on the metal layer and including at least one electrode hole exposing the metal layer;
a bank disposed on an edge region of the anode electrode and an edge region of the auxiliary electrode;
a light emitting layer disposed on a region of the anode electrode exposed by the bank;
an electron transport layer disposed on the light emitting layer and the auxiliary electrode; and
a cathode electrode disposed on the electron transport layer,
wherein the electron transport layer is in direct contact with the metal layer through the at least one electrode hole.

### Claim 2 (depends on 1)

The display device of claim 1, wherein a surface of an edge region of the light emitting layer that is adjacent to the bank is higher than a surface of a central region of the light emitting layer.

### Claim 3 (depends on 1)

The display device of claim 1, wherein the bank covers the edge region of the auxiliary electrode and exposes a central region of the auxiliary electrode.

### Claim 4 (depends on 3)

The display device of claim 3, wherein the bank does not overlap with all or some regions of the at least one electrode hole.

### Claim 5 (depends on 3)

The display device of claim 3, wherein the electron transport layer covers the central region of the auxiliary electrode and the bank.

### Claim 6 (depends on 5)

The display device of claim 5, wherein a first portion of the electron transport layer overlapping with the auxiliary electrode has a first thickness, and
wherein a second portion of the electron transport layer overlapping with the bank has a second thickness greater than the first thickness.

### Claim 7 (depends on 5)

The display device of claim 5, wherein a third portion of the electron transport layer overlapping with the at least one electrode hole has a first height, and
wherein a fourth portion of the electron transport layer adjacent to the third portion in an area not overlapping with the at least one electrode hole has a second height greater than the first height.

### Claim 8 (depends on 1)

The display device of claim 1, wherein the metal layer includes molybdenum titanium.

### Claim 9 (depends on 1)

The display device of claim 1, wherein the at least one electrode hole has a curved shape on a plane, and opposite ends of the at least one electrode hole are disposed adjacent to other electrode holes, respectively.

### Claim 10 (depends on 1)

The display device of claim 1, wherein the at least one electrode hole has a circular shape, an elliptical shape or polygonal shapes, and opposite sides of the at least one electrode hole are disposed adjacent to other electrode holes.

### Claim 11 (depends on 1)

The display device of claim 1, wherein the auxiliary electrode comprises:
a first layer including a transparent conductive material;
a second layer including a metal oxide; and
a third layer including the transparent conductive material.

### Claim 12 (depends on 11)

The display device of claim 11, wherein the electron transport layer is in direct contact with a portion of the second layer exposed through a sidewall of the at least one electrode hole.