# US 2018/0026233 A1 · Light-Emitting Panel, Light-Emitting Device, and Method for Manufacturing the Light-Emitting Panel

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- Number: US 2018/0026233 A1
- Document ID: US20180026233A1
- Status: Published application
- Kind: A1
- Application number: 15/676,089
- Filed: 2017-08-14
- Published: 2018-01-25
- Earliest claimed: 2011-03-25
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Nobuharu Ohsawa; Toshiki Sasaki; Satoshi Seo
- Web page: https://patentgrep.com/patent/US20180026233A1

## CPC

- H10K 59/30: Devices specially adapted for multicolour light emission
- H10K 59/32: Stacked devices having two or more layers, each emitting at different wavelengths
- H10K 59/876: {comprising a resonant cavity structure, e.g. Bragg reflector pair}
- H10K 59/35: comprising red-green-blue [RGB] subpixels
- H10K 59/351: {comprising more than three subpixels, e.g. red-green-blue-white [RGBW]}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A light-emitting panel can be manufactured in which a first light-emitting element emits light having high brightness and a pale color and causing less eyestrain even in the case of long time, a second light-emitting element emits light of a bright red color, a third light-emitting element emits green light, and a fourth light-emitting element emits blue light. Further, a layer transmitting light of a specific color (e.g., a color filter) is not provided in all the light-emitting elements except the second light-emitting element; thus, light emitted from the layer containing a light-emitting organic compound can be efficiently used. As a result, a light-emitting panel which is capable of bright, full-color light emission and whose power consumption is reduced can be provided.

## Claims

### Claim 1

A light-emitting panel comprising:
a first light-emitting element:
a second light-emitting element; and
a third light-emitting element,
wherein the first light-emitting element, the second light-emitting element, and the third light-emitting element each comprises, between a pair of a reflective film and a semi-transmissive and semi-reflective film, a layer containing a light-emitting organic compound interposed between a pair of electrodes and an optical adjustment layer,
wherein the layer containing a light-emitting organic compound in each of the first light-emitting element, the second light-emitting element, and the third light-emitting element emits light comprising light with a wavelength greater than or equal to 600 nm and less than 800 nm and light with a wavelength greater than or equal to 400 nm and less than 600 nm,
wherein the first light-emitting element and the second light-emitting element have an equal optical path length between the pair of the reflective film and the semi-transmissive and semi-reflective film of N/2 (N is a natural number) of a length greater than or equal to 600 nm and less than 800 nm,
wherein a layer transmitting red light is provided over the semi-transmissive and semi-reflective film in the second light-emitting element, and
wherein an optical path length between the pair of the reflective film and the semi-transmissive and semi-reflective film in the third light-emitting element is N/2 (N is a natural number) of a length greater than or equal to 400 nm and less than 600 nm.