Light-emitting device

Patent metadata

Field	Value
Publication number	US-10119683-B2
Application number	US-201815949471-A
Country	US
Kind code	B2
Filing date	Apr 10, 2018
Priority date	Jul 12, 2013
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

A light-emitting device includes a strip-like high flexibility region and a strip-like low flexibility region arranged alternately in a direction. The high flexibility region includes a flexible light-emitting panel. The low flexibility region includes the light-emitting panel and a support panel having a lower flexibility than that of the light-emitting panel and overlapping with the light-emitting panel. It is preferable that the light-emitting panel include an external connection electrode and that a length in the direction of a low flexibility region A that overlaps with the external connection electrode be longer than a length in the direction of a low flexibility region B that is closest to the region A.

First claim

The invention claimed is:

1. A light-emitting device comprising:
a flexible light-emitting panel,
wherein the flexible light-emitting panel comprises a region capable of being bent inward or outward so that a gap of the flexible light-emitting panel decreases as a distance from the region increases.

2. The light-emitting device according to claim 1 , wherein the flexible light-emitting panel comprises an electroluminescence element.

3. The light-emitting device according to claim 1 , further comprising:
a plurality of support panels each having a lower flexibility than the flexible light-emitting panel so as to prevent the light-emitting device from being bent at an undesired portion.

4. A light-emitting device comprising:
a flexible light-emitting panel,
wherein the flexible light-emitting panel comprises a region capable of being bent inward or outward with a curvature radius and a first flat region and a second flat region each connected to the region so that a distance between the first flat region and the second flat region is less than twice the curvature radius.

5. The light-emitting device according to claim 4 , wherein the curvature radius is greater than or equal to 1 mm and less than or equal to 10 mm.

6. The light-emitting device according to claim 4 , wherein the flexible light-emitting panel comprises an electroluminescence element.

7. The light-emitting device according to claim 4 , further comprising:
a plurality of support panels each having a lower flexibility than the flexible light-emitting panel so as to prevent the light-emitting device from being bent at an undesired portion.

8. A light-emitting device comprising:
a flexible light-emitting panel,
wherein the flexible light-emitting panel includes a first surface on one side of the flexible light-emitting panel and a second surface on the other side of the flexible light-emitting panel,
wherein the flexible light-emitting panel is foldable so that a first portion of the first surface and a second portion of the first surface face each other so as to be bent inward with a first curvature radius and a first portion of the second surface and a second portion of the second surface face each other so as to be bent outward with a second curvature radius, and a shortest distance between the first portion of the first surface and the first portion of the second surface is less than twice the sum of the first curvature radius and the second curvature radius, and
wherein the second portion of the first surface is opposite to the second portion of the second surface.

9. The light-emitting device according to claim 8 , wherein each of the first curvature radius and the second curvature radius is greater than or equal to 1 mm and less than or equal to 10 mm.

10. The light-emitting device according to claim 8 , wherein the flexible light-emitting panel comprises an electroluminescence element.

11. The light-emitting device according to claim 8 , further comprising:
a plurality of support panels each having a lower flexibility than the flexible light-emitting panel so as to prevent the light-emitting device from being bent at an undesired portion.

Assignees

• Semiconductor Energy Lab

Inventors

• Hirakata Yoshiharu
• Endo Akio

Classifications

• H04W72/569

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• H04W72/23

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• F21Y2115/20

  Electroluminescent [EL] light sources · CPC title

• F21Y2105/00

  Planar light sources · CPC title

• F21V15/012 Primary

  Housings with variable shape or dimensions, e.g. by means of elastically deformable materials or by movement of parts forming telescopic extensions of the housing body · CPC title