# US 10,374,176 B2 · Flexible organic electro-luminescence element

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- Number: US 10,374,176 B2
- Document ID: US10374176B2
- Status: Granted
- Kind: B2
- Application number: 14/772,762
- Filed: 2013-03-08
- Published: 2016-01-28
- Granted: 2019-08-06
- Earliest claimed: 2013-03-08
- Assignees: Pioneer Corporation
- Applicants: Pioneer Corporation
- Inventors: Takeru Okada
- Web page: https://patentgrep.com/patent/US10374176B2

## CPC

- H10K 77/111: {Flexible substrates}
- H10K 50/844: Encapsulations
- H10K 2102/311: {Flexible OLED}
- H10K 2102/351: {Thickness}
- Y02E 10/549: Organic PV cells
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A light emitting element includes a flexible plate-like portion having a glass substrate, and an organic functional layer formed on one surface side of the glass substrate. The organic functional layer includes a light emitting layer. When the plate-like portion is curved in a prescribed curving direction, and one surface of the plate-like portion is a concave surface, and the other surface thereof is a convex surface, a surface which is positioned on the concave surface side among both surfaces of the glass substrate is referred to as a first surface. When the plate-like portion is curved in a curving direction, and the one surface of the plate-like portion is a concave surface, and the other surface thereof is a convex surface, a compressive stress is applied to a portion whose distance from the first surface of the glass substrate is less than or equal to L (L>T/2).

## Claims

### Claim 1

A light emitting element, comprising:
a glass substrate, the glass substrate comprising one surface and another surface,
an organic functional layer which includes a light emitting layer, and is on the glass substrate,
a sealing layer on the organic functional layer, the sealing layer comprising an inorganic solid, and
a resin layer which is arranged toward the another surface side of the glass substrate,
wherein a thickness of the resin layer is thicker than the thickness of the glass substrate,
wherein a center of a thickness direction of the glass substrate is positioned on the one surface side of the light emitting element with respect to a center of the thickness direction of the light emitting element, and
wherein the organic functional layer is on a concave surface side of the glass substrate when the light emitting element is curved in a curving direction such that the one surface side of the glass substrate is a concave surface, and
wherein the center of the thickness direction of the light emitting element is in the resin layer.

### Claim 2 (depends on 1)

The light emitting element of claim 1, further comprising an electrode positioned between the sealing layer and the organic functional layer.

### Claim 3 (depends on 2)

The light emitting element of claim 2, further comprising another electrode positioned between the substrate and the organic functional layer.

### Claim 4 (depends on 1)

The light emitting element of claim 1, wherein the glass substrate is flexible.

### Claim 5 (depends on 1)

The light emitting element of claim 1, wherein the glass substrate has a thickness in a range of 10 microns to 200 microns.

### Claim 6

A light emitting element, comprising:
a glass substrate, the glass substrate comprising one surface and another surface,
an organic functional layer which includes a light emitting layer, and is on the glass substrate,
a sealing layer on the organic functional layer, the sealing layer comprising an inorganic solid, and
a resin layer which is arranged toward the another surface side of the glass substrate,
wherein a thickness of the resin layer is thicker than the thickness of the glass substrate,
wherein a center of a thickness direction of the glass substrate is positioned on the one surface side of the light emitting element with respect to a center of the thickness direction of the light emitting element, and
wherein the organic functional layer is on a concave surface side of the glass substrate when the light emitting element is curved in a curving direction such that the one surface side of the glass substrate is a concave surface, and
wherein the center of the thickness direction of the light emitting element is in the glass substrate.

### Claim 7 (depends on 6)

The light emitting element of claim 6, further comprising an electrode positioned between the sealing layer and the organic functional layer.

### Claim 8 (depends on 7)

The light emitting element of claim 7, further comprising another electrode positioned between the substrate and the organic functional layer.

### Claim 9 (depends on 6)

The light emitting element of claim 6, wherein the glass substrate is flexible.

### Claim 10 (depends on 6)

The light emitting element of claim 6, wherein the glass substrate has a thickness in a range of 10 microns to 200 microns.