Display device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-10355067-B2
Application number	US-201815894117-A
Country	US
Kind code	B2
Filing date	Feb 12, 2018
Priority date	Dec 2, 2013
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

A first organic resin layer is formed over a first substrate; a first insulating film is formed over the first organic resin layer; a first element layer is formed over the first insulating film; a second organic resin layer is formed over a second substrate; a second insulating film is formed over the second organic resin layer; a second element layer is formed over the second insulating film; the first substrate and the second substrate are bonded; a first separation step in which adhesion between the first organic resin layer and the first substrate is reduced; the first organic resin layer and a first flexible substrate are bonded with a first bonding layer; a second separation step in which adhesion between the second organic resin layer and the second substrate is reduced; and the second organic resin layer and a second flexible substrate are bonded with a second bonding layer.

First claim

What is claimed is:

1. A portable information terminal comprising:
a first flexible substrate;
a first bonding layer over the first flexible substrate;
a first organic resin layer over the first bonding layer;
an insulating layer over the first organic resin layer;
a transistor over the insulating layer; and
an EL element electrically connected to the transistor,
wherein a thickness of the first organic resin layer is less than or equal to 20 μm, and
wherein at least a part of a display portion of the portable information terminal comprises a curved surface.

2. The portable information terminal according to claim 1 , wherein the first organic resin layer comprises at least one of an epoxy resin, an aramid resin, an acrylic resin, a polyimide resin, a polyamide resin, and a polyamide-imide resin.

3. The portable information terminal according to claim 1 , wherein the first bonding layer comprises at least one of an epoxy resin, an acrylic resin, a silicone resin, and a phenol resin.

4. The portable information terminal according to claim 1 , further comprising a color filter over the EL element.

5. The portable information terminal according to claim 1 , further comprising:
a second organic resin layer over the EL element;
a second bonding layer over the second organic resin layer; and
a second flexible substrate over the second bonding layer.

6. The portable information terminal according to claim 1 , further comprising a band configured to be worn on a wrist.

7. The portable information terminal according to claim 1 , further comprising a cylindrical housing,
wherein the cylindrical housing is configured to include the display portion by rolling the display portion.

8. The portable information terminal according to claim 1 , further comprising an operation system and an operation button,
wherein the portable information terminal is configured to set functions of the operation button by the operation system.

9. A portable information terminal comprising:
a first flexible substrate;
a first bonding layer over the first flexible substrate;
a first organic resin layer over the first bonding layer;
an insulating layer over the first organic resin layer;
a transistor over the insulating layer;
an EL element electrically connected to the transistor; and
a touch sensor over the EL element,
wherein a thickness of the first organic resin layer is less than or equal to 20 μm,
wherein at least a part of a display portion of the portable information terminal comprises a curved surface, and
wherein the portable information terminal is configured to perform charging operation by wireless power feeding.

10. The portable information terminal according to claim 9 , wherein the first organic resin layer comprises at least one of an epoxy resin, an aramid resin, an acrylic resin, a polyimide resin, a polyamide resin, and a polyamide-imide resin.

11. The portable information terminal according to claim 9 , wherein the first bonding layer comprises at least one of an epoxy resin, an acrylic resin, a silicone resin, and a phenol resin.

12. The portable information terminal according to claim 9 , further comprising a color filter over the EL element.

13. The portable information terminal according to claim 9 , further comprising:
a second organic resin layer over the EL element;
a second bonding layer over the second organic resin layer; and
a second flexible substrate over the second bonding layer.

14. The portable information terminal according to claim 9 , further comprising a band configured to be worn on a wrist.

15. The portable information terminal according to claim 9 , further comprising a cylindrical housing,
wherein the cylindrical housing is configured to include the display portion by rolling the display portion.

16. The portable information terminal according to claim 9 , further comprising an operation system and an operation button,
wherein the portable information terminal is configured to set functions of the operation button by the operation system.

17. A portable information terminal comprising:
a first flexible substrate;
a first bonding layer over the first flexible substrate;
a first organic resin layer over the first bonding layer;
an insulating layer over the first organic resin layer;
a transistor over the insulating layer; and
an EL element electrically connected to the transistor,
wherein a thickness of the first organic resin layer is less than or equal to 20 μm,
wherein the transistor comprises an oxide semiconductor in a channel formation region, and
wherein at least a part of a display portion of the portable information terminal comprises a curved surface.

18. The portable information terminal according to claim 17 , wherein the oxide semiconductor comprises indium and zinc.

19. The portable information terminal according to claim 17 , wherein the first organic resin layer comprises at least one of an epoxy resin, an aramid resin, an acrylic resin, a polyimide resin, a polyamide resin, and a polyamide-imide resin.

20. The portable information terminal according to claim 17 , wherein the first bonding layer comprises at least one of an epoxy resin, an acrylic resin, a silicone resin, and a phenol resin.

21. The portable information terminal according to claim 17 , further comprising a color filter over the EL element.

22. The portable information terminal according to claim 17 , further comprising:
a second organic resin layer over the EL element;
a second bonding layer over the second organic resin layer; and
a second flexible substrate over the second bonding layer.

23. The portable information terminal according to claim 17 , further comprising a band configured to be worn on a wrist.

24. The portable information terminal according to claim 17 , further comprising a cylindrical housing,
wherein the cylindrical housing is configured to include the display portion by rolling the display portion.

25. The portable information terminal according to claim 17 , further comprising an operation system and an operation button,
wherein the portable information terminal is configured to set functions of the operation button by the operation system.

Assignees

• Semiconductor Energy Lab

Inventors

• Yamazaki Shunpei
• Ohno Masakatsu
• Adachi Hiroki
• Idojiri Satoru
• Takeshima Koichi

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• B23K26/0622

  by shaping pulses · CPC title

• G09F9/33

  being semiconductor devices, e.g. diodes · CPC title

• B23K26/04

  Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light · CPC title

• B23K26/0648

  comprising lenses · CPC title