# US 11,444,134 B2 · Light-emitting device, and electronic apparatus

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- Number: US 11,444,134 B2
- Document ID: US11444134B2
- Status: Granted
- Kind: B2
- Application number: 16/936,591
- Filed: 2020-07-23
- Published: 2021-01-28
- Granted: 2022-09-13
- Earliest claimed: 2019-07-24
- Assignees: Seiko Epson Corporation
- Applicants: Seiko Epson Corporation
- Inventors: Takeshi Koshihara; Jun Irobe
- Web page: https://patentgrep.com/patent/US11444134B2

## CPC

- H10K 59/12: Active-matrix OLED [AMOLED] displays
- H10K 59/353: {characterised by the geometrical arrangement of the RGB subpixels}
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/876: {comprising a resonant cavity structure, e.g. Bragg reflector pair}
- H10K 59/80518: {Reflective anodes, e.g. ITO combined with thick metallic layers}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A light-emitting device includes a semi-transmissive reflection layer, a first reflection layer that is disposed in a first sub-pixel, a first pixel electrode that is disposed in the first sub-pixel, a first color filer that is disposed in the first sub-pixel, a second reflection layer that is disposed in a second sub-pixel, a second pixel electrode that is disposed in the second sub-pixel, a second color filter that is disposed in the second sub-pixel, the second color filter that is same color as the first color filter, a light-emitting functional layer, and an insulating layer that is disposed between the first reflection layer and the first pixel electrode, the light-emitting functional layer that is disposed between the second reflection layer and the second pixel electrode. A thickness of the insulating layer in the second sub-pixel is thicker than a thickness of the insulating layer in the first sub-pixel.

## Claims

### Claim 1

A light-emitting device comprising:
a semi-transmissive reflection layer;
a first reflection layer that is disposed in a first sub-pixel;
a first pixel electrode that is disposed in the first sub-pixel;
a first color filter that is disposed in the first sub-pixel, and that is disposed on an opposite-side of the semi-transmissive reflection layer from the first reflection layer;
a second reflection layer that is disposed in a second sub-pixel;
a second pixel electrode that is disposed in the second sub-pixel;
a second color filter that is disposed in the second sub-pixel, and that is disposed on an opposite-side of the semi-transmissive reflection layer from the second reflection layer, and that is same color as the first color filter;
a light-emitting functional layer that is disposed between the first reflection layer and the semi-transmissive reflection layer, and that is disposed between the second reflection layer and the semi-transmissive reflection layer; and
an insulating layer that is disposed between the first reflection layer and the first pixel electrode, and that is disposed between the second reflection layer and the second pixel electrode, wherein
the first pixel electrode is disposed between the first reflection layer and the light-emitting functional layer,
the second pixel electrode is disposed between the second reflection layer and the light-emitting functional layer,
a thickness of the insulating layer in the second sub-pixel is thicker than a thickness of the insulating layer in the first sub-pixel,
the insulating layer having a first layer including a first material and a second layer including a second material which is different from the first material, and
a thickness of the first layer in the second sub-pixel is thicker than a thickness of the first layer in the first sub-pixel.

### Claim 2 (depends on 1)

The light-emitting device according to claim 1, wherein
the first sub-pixel is arranged in a center of a display region more than the second sub-pixel.

### Claim 3 (depends on 1)

An electronic apparatus comprising the light-emitting device of claim 1.

### Claim 4

A light-emitting device comprising:
a semi-transmissive reflection layer;
a first reflection layer that is disposed in a first sub-pixel;
a first pixel electrode that is disposed in the first sub-pixel;
a second reflection layer that is disposed in a second sub-pixel, the second sub-pixel that emits same color light as the first sub-pixel;
a second pixel electrode that is disposed in the second sub-pixel;
light-emitting functional layer that is disposed between the first reflection layer and the semi-transmissive reflection layer, and that is disposed between the second reflection layer and the semi-transmissive reflection layer; and
an insulating layer that is disposed between the first reflection layer and the first pixel electrode, and that is disposed between the second reflection layer and the second pixel electrode, wherein
the first pixel electrode is disposed between the first reflection layer and the light-emitting functional layer,
the second pixel electrode is disposed between the second reflection layer and the light-emitting functional layer,
a thickness of the insulating layer in the second sub-pixel is thicker than a thickness of the insulating layer in the first sub-pixel,
the insulating layer having a first layer including a first material and a second layer including a second material which is different from the first material, and
a thickness of the first layer in the second sub-pixel is thicker than a thickness of the first layer in the first sub-pixel.

### Claim 5 (depends on 4)

The light-emitting device according to claim 4, wherein
the first sub-pixel is arranged in a center of a display region more than the second sub-pixel.

### Claim 6

A light-emitting device comprising:
a semi-transmissive reflection layer;
a first reflection layer that is disposed in a first sub-pixel;
a first pixel electrode that is disposed in the first sub-pixel;
a second reflection layer that is disposed in a second sub-pixel, the second sub-pixel that emits same color light as the first sub-pixel;
a second pixel electrode that is disposed in the second sub-pixel;
a light-emitting functional layer that is disposed between the first reflection layer and the semi-transmissive reflection layer, and that is disposed between the second reflection layer and the semi-transmissive reflection layer; and
an insulating layer that is disposed between the first reflection layer and the first pixel electrode, and that is disposed between the second reflection layer and the second pixel electrode, wherein
the first pixel electrode is disposed between the first reflection layer and the light-emitting functional layer,
the second pixel electrode is disposed between the second reflection layer and the light-emitting functional layer,
the first sub-pixel is disposed closer to a center of a display region than the second sub-pixel,
the insulating layer has a first layer including silicon nitride and a second layer including silicon nitride, and
a thickness of the first layer in the second sub-pixel is thicker than a thickness of the first layer in the first sub-pixel.

### Claim 7 (depends on 6)

The light-emitting device according to claim 6, wherein
a first surface of the insulating layer that faces the first reflection layer is planar and a second surface of the insulating layer that faces the light-emitting functional layer has a step shape.