Light-emitting device

Inventors: Yoshiharu Hirakata (Kanagawa, JP); Akio Endo (Kanagawa, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

F21V15/012 H04W72/1242 H04W72/1289 H04W72/14 F21Y2105/00 F21Y2115/20 H01L27/323 H01L27/3262 H01L2227/323 H01L2251/5338

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Quick Facts

Patent No.: US 11,639,785
App. No.: 17/752,919
Granted: May 2, 2023
Kind: B2

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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.

Claims (65)

1. A light-emitting device comprising:

a light-emitting panel having a light-emitting surface and configured to be bent so that the light-emitting surface is placed inward of a resulting bend;

a first protective layer provided under the light-emitting panel, the first protective layer being configured to protect the light-emitting panel;

a second protective layer provided over the light-emitting panel, the second protective layer being configured to protect the light-emitting panel;

a first support body provided under the first protective layer, the first support body being configured to support the light-emitting panel; and

a second support body provided under the first protective layer, the second support body being configured to support the light-emitting panel,

wherein the light-emitting panel comprises a light-emitting region and a non-light-emitting region surrounding the light-emitting region,

wherein flexibility of the first protective layer is lower than flexibility of the light-emitting panel,

wherein flexibility of each of the first support body and the second support body is lower than the flexibility of the first protective layer,

wherein the light-emitting panel comprises a first portion overlapping with the first support body, a second portion overlapping with the second support body, and a bent portion between the first portion and the second portion,

wherein the bent portion comprises a curved surface with a curvature radius in a state where the light-emitting panel is bent,

wherein the first support body and the second support body are separated from each other with a gap in the state where the light-emitting panel is bent,

wherein the bent portion, the first portion, and the second portion overlap with the first protective layer, and

wherein the second protective layer overlaps with the first protective layer through the bent portion and does not overlap with the light-emitting region.

2. The light-emitting device according to claim 1 ,

wherein flexibility of the second protective layer is lower than the flexibility of the light-emitting panel.

3. The light-emitting device according to claim 1 ,

wherein the first support body and the second support body comprise a metal.

4. The light-emitting device according to claim 1 ,

wherein the first protective layer comprises a metal.

5. The light-emitting device according to claim 1 ,

wherein the second protective layer comprises rubber.

6. The light-emitting device according to claim 1 ,

wherein the light-emitting panel comprises a transistor comprising a polycrystalline semiconductor in a channel formation region.

7. The light-emitting device according to claim 1 ,

wherein the light-emitting panel comprises a light-emitting element comprising a low molecular compound.

8. The light-emitting device according to claim 1 ,

wherein the light-emitting device is configured to put the light-emitting panel in a non-light-emitting state when the light-emitting device is bent.

9. The light-emitting device according to claim 1 ,

wherein a minimum curvature radius of the bent portion is greater than or equal to 1 mm and less than or equal to 10 mm.

10. The light-emitting device according to claim 1 ,

wherein the light-emitting panel comprises a driver circuit portion in the non-light-emitting region.

11. A light-emitting device comprising: