# US 2021/0242289 A1 · Electroluminescent display apparatus

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

- Number: US 2021/0242289 A1
- Document ID: US20210242289A1
- Status: Published application
- Kind: A1
- Application number: 17/239,259
- Filed: 2021-04-23
- Published: 2021-08-05
- Earliest claimed: 2018-11-29
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Daehee KIM; JiYoung PARK; Hyeju CHOI
- Web page: https://patentgrep.com/patent/US20210242289A1

## CPC

- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 50/13: comprising stacked EL layers within one EL unit
- H10K 50/17: Carrier injection layers
- H10K 59/353: {characterised by the geometrical arrangement of the RGB subpixels}
- H10K 59/876: {comprising a resonant cavity structure, e.g. Bragg reflector pair}
- H10K 59/1201: {Manufacture or treatment}
- H10K 59/35: comprising red-green-blue [RGB] subpixels
- H10K 59/873: {Encapsulations}
- H10K 2102/00: Constructional details relating to the organic devices covered by this subclass
- H10K 2102/351: {Thickness}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

The present disclosure provides an electroluminescent display apparatus including a substrate including a first subpixel, a second subpixel, and a third subpixel, a first electrode in each of the first subpixel, the second subpixel, and the third subpixel on the substrate, a bank provided in a boundary between any two of the first subpixel, the second subpixel, and the third subpixel to cover an edge of the first electrode, a protection layer on the first electrode and the bank, a light emitting layer on the protection layer, and a second electrode on the light emitting layer.

## Claims

### Claim 1

An electroluminescent display apparatus comprising:
a first pixel including a first subpixel emitting light of a first color, a second subpixel emitting light of a second color, and a third subpixel emitting light of a third color, the first pixel being provided in a substrate;
a second pixel including a first subpixel emitting light of the first color, a second subpixel emitting light of the second color, and a third subpixel emitting light of the third color, the second pixel being provided in the substrate;
a first electrode in each of the first subpixel, the second subpixel, and the third subpixel in each of the first pixel and the second pixel;
a protection layer on the first electrode;
a light emitting layer on the protection layer; and
a second electrode on the light emitting layer,
wherein the protection layer comprises a first portion overlapping the first subpixel, a second portion overlapping the second subpixel, a third portion overlapping the third subpixel, a fourth portion overlapping a boundary between any two of the first subpixel, the second subpixel, and the third subpixel, and a fifth portion overlapping a boundary between the first pixel and the second pixel.

### Claim 2 (depends on 1)

The electroluminescent display apparatus of claim 1, wherein a thickness of the first portion is thicker than a thickness of the second portion, a thickness of the second portion is thicker than a thickness of the third portion, and a thickness of the third portion is thicker than a thickness of the fourth portion.

### Claim 3 (depends on 1)

The electroluminescent display apparatus of claim 1, wherein a thickness of the fifth portion is the same as a thickness of the fourth portion.

### Claim 4 (depends on 1)

The electroluminescent display apparatus of claim 1, wherein a thickness of the fifth portion is thicker than a thickness of the fourth portion.

### Claim 5 (depends on 4)

The electroluminescent display apparatus of claim 4, wherein a thickness of the fifth portion overlapping a boundary region between the first subpixel of the first pixel and the first subpixel of the second pixel is the same as a thickness of the first portion.

### Claim 6 (depends on 4)

The electroluminescent display apparatus of claim 4, wherein a thickness of the fifth portion overlapping a boundary region between the second subpixel of the first pixel and the second subpixel of the second pixel is the same as a thickness of the second portion, and
a thickness of the fifth portion overlapping a boundary region between the third subpixel of the first pixel and the third subpixel of the second pixel is the same as a thickness of the third portion.

### Claim 7 (depends on 1)

The electroluminescent display apparatus of claim 1, wherein the light emitting layer comprises a lower layer and an upper layer provided on the lower layer,
the lower layer includes a plurality of lower layers that are respectively patterned in the first subpixel, the second subpixel, and the third subpixel and are spaced apart from one another,
the upper layer is provided in a region of the first subpixel, a region of the second subpixel, a region of the third subpixel, and in a boundary region between any two of the first subpixel, the second subpixel, and the third subpixel.

### Claim 8 (depends on 7)

The electroluminescent display apparatus of claim 7, wherein the lower layer provided in the first subpixel has a same pattern as the first portion of the protection layer, the lower layer provided in the second subpixel is provided to have the same pattern as a pattern of the second portion of the protection layer, and the lower layer provided in the third subpixel has a same pattern as the third portion of the protection layer.

### Claim 9 (depends on 8)

The electroluminescent display apparatus of claim 8, wherein the lower layer provided in the first subpixel comprises a plurality of organic layers including a red light emitting layer, the lower layer provided in the second subpixel comprises a plurality of organic layers including a green light emitting layer, and the lower layer provided in the third subpixel comprises a plurality of organic layers including a blue light emitting layer.

### Claim 10 (depends on 1)

The electroluminescent display apparatus of claim 1, wherein the light emitting layer includes a plurality of light emitting layers that are respectively patterned in the first subpixel, the second subpixel, and the third subpixel and are spaced apart from one another.

### Claim 11 (depends on 10)

The electroluminescent display apparatus of claim 10, wherein the light emitting layer provided in the first subpixel has a same pattern as the first portion of the protection layer, the light emitting layer provided in the second subpixel has a same pattern as the second portion of the protection layer, and the light emitting layer provided in the third subpixel has a same pattern as the third portion of the protection layer.

### Claim 12 (depends on 1)

The electroluminescent display apparatus of claim 1, further comprising a bank disposed between two adjacent subpixels among the first subpixel, the second subpixel and the third subpixel and covering a respective edge of the first electrode of each of the first, second, and third subpixels.

### Claim 13 (depends on 12)

The electroluminescent display apparatus of claim 12, wherein the first portion extends to an upper surface of the first electrode of the first subpixel and a portion of an upper surface of the bank along a side surface of the bank adjacent to the first subpixel,
the second portion extends to an upper surface of the first electrode of the second subpixel and a portion of an upper surface of the bank along a side surface of the bank adjacent to the second subpixel,
the third portion extends to an upper surface of the first electrode of the third subpixel and a portion of an upper surface of the bank along a side surface of the bank adjacent to the third subpixel, and
the fourth portion is provided on an upper surface of the bank between the first subpixel and the second subpixel and an upper surface of the bank between the second subpixel and the third subpixel.

### Claim 14 (depends on 13)

The electroluminescent display apparatus of claim 13, wherein the fourth portion is connected to the first portion and the second portion between the first portion and the second portion and is connected to the second portion and the third portion between the second portion and the third portion.

### Claim 15 (depends on 1)

The electroluminescent display apparatus of claim 1, wherein the protection layer has a thickness of 0.3 μm or less.

### Claim 16 (depends on 1)

The electroluminescent display apparatus of claim 1, further comprising a lens array spaced apart from the substrate and an accommodating case accommodating the substrate and the lens array.