# US 2014/0191216 A1 · Organic el display device

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- Number: US 2014/0191216 A1
- Document ID: US20140191216A1
- Status: Published application
- Kind: A1
- Application number: 14/146,807
- Filed: 2014-01-03
- Published: 2014-07-10
- Earliest claimed: 2013-01-04
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Yuko MATSUMOTO; Toshihiro SATO; Hiroshi OOOKA
- Web page: https://patentgrep.com/patent/US20140191216A1

## CPC

- H10K 59/805: {Electrodes}
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/876: {comprising a resonant cavity structure, e.g. Bragg reflector pair}
- H10K 59/877: {comprising scattering means}
- H10K 59/12: Active-matrix OLED [AMOLED] displays
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants}
- H10K 59/873: {Encapsulations}
- H10K 59/878: {comprising reflective means}
- H10K 2102/3026: {Top emission}
- H10K 2102/351: {Thickness}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An organic EL display device includes a first substrate, a plurality of organic EL devices arranged on the first substrate, a second substrate arranged above the first substrate, and a filling layer arranged between the first substrate and the second substrate, and displays an image on the second-substrate side. The organic EL display device is characterized in that: the organic EL devices each have a light-emission layer, a reflection electrode formed below the light-emission layer and reflecting light from the light-emission layer upwards, and an upper electrode formed above the light-emission layer and having a light transmission property and reflectivity; a structure for resonating the light emitted by the light-emission layer is formed between the reflection electrode and the upper electrode; and the filling layer includes fine particles for diffusing light exiting from the upper electrode added therein.

## Claims

### Claim 1

An organic EL display device comprising:
a first substrate;
a plurality of organic EL devices arranged on the first substrate;
a second substrate arranged above the first substrate;
a filling layer arranged between the first substrate and the second substrate, wherein
an image is displayed on a second substrate side,
each of the plurality of organic EL devices includes:
a light-emission layer;
a reflection electrode formed below the light-emission layer to reflect light from the light-emission layer upwards; and
an upper electrode formed above the light-emission layer and having a light transmission property and reflectivity,
a structure which resonates the light emitted from the light-emission layer is formed between the reflection electrode and the upper electrode, and
the filling layer includes fine particles added therein which diffuse the light resonated by the structure and exiting from the upper electrode.

### Claim 2 (depends on 1)

An organic EL display device according to claim 1, wherein the fine particles having diameters from 300 nm to 30 μm are included in the filling layer.

### Claim 3 (depends on 1)

An organic EL display device according to claim 1, wherein the second substrate has a color filter layer formed to respectively correspond to the plurality of organic EL devices and a black matrix.

### Claim 4 (depends on 1)

An organic EL display device according to claim 1, wherein the light-emission layers of the plurality of organic EL devices are formed to be painted in a plurality of color, respectively, to emit light of the plurality of colors.