Light-emitting device, electronic device, and lighting device

Patent metadata

Field	Value
Publication number	US-2016226019-A1
Application number	US-201615046753-A
Country	US
Kind code	A1
Filing date	Feb 18, 2016
Priority date	Aug 1, 2013
Publication date	Aug 4, 2016
Grant date	—

Abstract

A lightweight flexible light-emitting device that is less likely to be broken is provided. The light-emitting device includes a first flexible substrate, a second flexible substrate, an element layer, a first bonding layer, and a second bonding layer. The element layer includes a light-emitting element. The element layer is provided between the first flexible substrate and the second flexible substrate. The first bonding layer is provided between the first flexible substrate and the element layer. The second bonding layer is provided between the second flexible substrate and the element layer. The first and second bonding layers are in contact with each other on the outer side of an end portion of the element layer. The first and second flexible substrates are in contact with each other on the outer side of the end portions of the element layer, the first bonding layer, and the second bonding layer.

First claim

1 . (canceled)

2 . A light-emitting device comprising:
a first flexible substrate; a first bonding layer over the first flexible substrate; a first insulating layer over the first bonding layer; a transistor over the first insulating layer; a second insulating layer over the transistor; a light-emitting element over the second insulating layer, the light-emitting element being electrically connected to the transistor, wherein the light-emitting element comprises:
a first electrode over the second insulating layer;
a third insulating layer over the first electrode;
a fourth insulating layer over the third insulating layer;
a light-emitting layer over the third insulating layer and the fourth insulating layer; and
a second electrode over the light-emitting layer;
a first conductive layer over the first insulating layer; a first connector over the first conductive layer; a first FPC electrically connected to the first conductive layer through the first connector; a second flexible substrate over the light-emitting element; a touch sensor over the second flexible substrate, wherein the touch sensor comprises:
a second conductive layer over the second flexible substrate;
a third conductive layer over the second conductive layer; and
an insulating layer between the second conductive layer and the third conductive layer,
a fourth conductive layer over the second flexible substrate; a second connector over the fourth conductive layer; and a second FPC electrically connected to the fourth conductive layer through the second connector, wherein the first conductive layer and one of a source electrode and a drain electrode of the transistor comprise a same material, wherein each of the third insulating layer and the fourth insulating layer overlaps with the first electrode, and wherein the second electrode is capable of transmitting visible light.

3 . The light-emitting device according to claim 2 , wherein one of the second conductive layer and the third conductive layer overlaps with the second electrode.

4 . The light-emitting device according to claim 2 , wherein one of the second conductive layer and the third conductive layer overlaps with the first electrode.

5 . The light-emitting device according to claim 2 , further comprising:
a second bonding layer between the light-emitting element and the second flexible substrate.

6 . The light-emitting device according to claim 2 , wherein the first insulating layer comprises an inorganic insulating material.

7 . The light-emitting device according to claim 2 , wherein the first flexible substrate comprises one of glass, quartz, ceramics, sapphire, and organic resin.

8 . The light-emitting device according to claim 2 , wherein the first FPC overlaps with the first flexible substrate.

9 . The light-emitting device according to claim 2 , wherein the touch sensor is a capacitive touch sensor.

10 . The light-emitting device according to claim 2 , wherein the first flexible substrate and the second flexible substrate comprise a same material.

11 . A light-emitting device comprising:
a first flexible substrate; a first bonding layer over the first flexible substrate; a first insulating layer over the first bonding layer; a transistor over the first insulating layer; a second insulating layer over the transistor; a light-emitting element over the second insulating layer, the light-emitting element being electrically connected to the transistor, wherein the light-emitting element comprises:
a first electrode over the second insulating layer;
a third insulating layer over the first electrode;
a fourth insulating layer over the third insulating layer;
a light-emitting layer over the third insulating layer and the fourth insulating layer; and
a second electrode over the light-emitting layer;
a first conductive layer over the first insulating layer; a first connector over the first conductive layer; a first FPC electrically connected to the first conductive layer through the first connector; a second flexible substrate over the light-emitting element; a fifth insulating layer over the second flexible substrate; a touch sensor over the fifth insulating layer, wherein the touch sensor comprises:
a second conductive layer over the fifth insulating layer;
a third conductive layer over the second conductive layer; and
an insulating layer between the second conductive layer and the third conductive layer,
a fourth conductive layer over the fifth insulating layer; a second connector over the fourth conductive layer; and a second FPC electrically connected to the fourth conductive layer through the second connector, wherein the first conductive layer and one of a source electrode and a drain electrode of the transistor comprise a same material, wherein each of the third insulating layer and the fourth insulating layer overlaps with the first electrode, and wherein the second electrode is capable of transmitting visible light.

12 . The light-emitting device according to claim 11 , wherein one of the second conductive layer and the third conductive layer overlaps with the second electrode.

13 . The light-emitting device according to claim 11 , wherein one of the second conductive layer and the third conductive layer overlaps with the first electrode.

14 . The light-emitting device according to claim 11 , further comprising:
a second bonding layer between the light-emitting element and the second flexible substrate.

15 . The light-emitting device according to claim 11 , wherein the first insulating layer comprises an inorganic insulating material.

16 . The light-emitting device according to claim 11 , wherein the first flexible substrate comprises one of glass, quartz, ceramics, sapphire, and organic resin.

17 . The light-emitting device according to claim 11 , wherein the first FPC overlaps with the first flexible substrate.

18 . The light-emitting device according to claim 11 , wherein the touch sensor is a capacitive touch sensor.

19 . The light-emitting device according to claim 11 , wherein the first flexible substrate and the second flexible substrate comprise a same material.

Assignees

• Semiconductor Energy Lab

Inventors

• Yamazaki Shunpei
• Jinbo Yasuhiro
• Eguchi Shingo

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• H10K77/111

  Flexible substrates · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title