# US 10,770,682 B2 · Display panel and method for fabricating the same

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- Number: US 10,770,682 B2
- Document ID: US10770682B2
- Status: Granted
- Kind: B2
- Application number: 16/222,732
- Filed: 2018-12-17
- Published: 2019-06-27
- Granted: 2020-09-08
- Earliest claimed: 2017-12-21
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Dohyung Kim; Seungwon Yoo; Jonghyeok Im; Jaesung Lee
- Web page: https://patentgrep.com/patent/US10770682B2

## CPC

- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/124: Insulating layers formed between TFT elements and OLED elements
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 59/873: {Encapsulations}
- H10K 59/80522: {combined with auxiliary electrodes}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A display panel comprises: a planarization layer that lies on a substrate and compensates for irregularities; an electrode pattern that lies on the planarization layer in a non-display area of the substrate and exposes at least part of the planarization layer; and a moisture-impermeable layer that covers the planarization layer exposed by the electrode pattern.

## Claims

### Claim 1

A display panel, comprising:
a planarization layer that lies on a substrate and forms a planar upper surface;
an electrode pattern having electrode members positioned at first locations on the planarization layer in a non-display area of the substrate, and no electrode members at second locations;
a moisture-impermeable layer that covers the planarization layer, the moisture-impermeable layer being in contact with the electrode members at the first locations and in contact with the planarization layer at the second locations; and
an organic light-emitting diode that lies on the planarization layer in a display area, wherein a cathode of the organic light-emitting diode is in contact with the moisture-impermeable layer,
wherein the moisture-impermeable layer is made of a conductive metal material, and the electrode pattern receives a low-level voltage and applies the same to the cathode.

### Claim 2 (depends on 1)

The display panel of claim 1, further comprising a bank layer that lies on the planarization layer and divides the substrate into the display area and the non-display area.

### Claim 3 (depends on 1)

The display panel of claim 1, wherein the moisture-impermeable layer is made of aluminum.

### Claim 4 (depends on 1)

The display panel of claim 1, wherein the cathode partially overlies the moisture-impermeable layer.

### Claim 5

A display panel, comprising:
a planarization layer that lies on a substrate and forms a planar upper surface;
an organic emissive layer overlying the planarization layer;
an electrode pattern having electrode members positioned at first locations on the planarization layer in a non-display area of the substrate, and no electrode members at second locations;
a moisture-impermeable layer that covers the planarization layer, the moisture-impermeable layer being in contact with a part of the organic emissive layer, in contact with the electrode members at the first locations, and in contact with the planarization layer at the second locations; and
a cathode that overlies the organic emissive layer and the moisture-impermeable layer,
wherein the moisture-impermeable layer is composed of an electrically conductive metallic aluminum.

### Claim 6 (depends on 5)

The display panel of claim 5, wherein the cathode overlies the electrode members of the electrode pattern at the first locations and not overlies at the second locations for aging the moisture-impermeable layer.