Electronic device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-12052833-B2
Application number	US-201815923392-A
Country	US
Kind code	B2
Filing date	Mar 16, 2018
Priority date	Jun 5, 2017
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

An electronic device includes an electronic panel configured to be folded along a folding axis extending in one direction, a flexible window member on a top surface of the electronic panel, a protective member on a bottom surface of the electronic panel, the protective member including a base layer including a material that has a glass transition temperature higher than a glass transition temperature of polyethylene terephthalate (PET), and a cushion layer contacting a bottom surface of the base layer and having a porous structure, and an adhesive member coupling the electronic panel to the protective member.

First claim

What is claimed is:

1. An electronic device comprising:
an electronic panel configured to be folded along a folding axis extending in one direction and including an active area and a non-active area around the active area;
a flexible window member on a top surface of the electronic panel;
a protective member on a bottom surface of the electronic panel, the protective member comprising:
a base layer; and
a cushion layer having a porous structure, and being physically coupled directly to a bottom surface of the base layer that is further away from the electronic panel than a top surface of the base layer, a bottom surface of the cushion layer having convex portions such that the bottom surface of the cushion layer is uneven between nearest neighboring convex portions and is rough;

a first adhesive member coupling the electronic panel to the protective member;
a lower protective member between an insulating substrate and the first adhesive member and comprising a polymer material; and
a second adhesive member contacting a bottom surface of the insulating substrate and a top surface of the lower protective member to couple the insulating substrate to the lower protective member,
wherein the first adhesive member contacts a bottom surface of the lower protective member,
wherein the active area of the electronic panel, a portion of the base layer overlapping the active area, and a portion of the cushion layer overlapping the active area are configured to be folded along the folding axis,
wherein a surface property of the bottom surface of the base layer is different from that of the top surface of the base layer such that an adhesive force between the cushion layer and the bottom surface of the base layer is greater than an adhesive force between the cushion layer and the top surface of the base layer, and
wherein the cushion layer is formed by directly applying a fluid foam member to the bottom surface of the base layer.

2. The electronic device of claim 1 , wherein a roughness of the bottom surface of the base layer is greater than a roughness of the top surface of the base layer.

3. The electronic device of claim 1 , wherein the bottom surface of the base layer is more hydrophilic than the top surface of the base layer.

4. The electronic device of claim 1 , wherein the base layer includes crystalline polyethylene terephthalate (C-PET).

5. The electronic device of claim 1 , wherein the first adhesive member comprises a pressure sensitive adhesive (PSA).

6. The electronic device of claim 1 , wherein the cushion layer comprises synthetic resin foam.

7. The electronic device of claim 1 , wherein the electronic panel comprises:
the insulating substrate; and
a driving element on the insulating substrate, configured to be activated by an external electrical signal applied thereto, and comprising at least one of a display element for displaying an image and a sensing element for sensing an external input applied to the electronic panel.

8. The electronic device of claim 1 , wherein the electronic panel, the flexible window member, the first adhesive member, and the protective member are foldable along the folding axis.

9. The electronic device of claim 8 , wherein the electronic device is operable in a first mode in which the electronic device is folded such that the flexible window member is closer to the folding axis than the protective member, and
wherein the electronic device is operable in a second mode in which the electronic device is folded such that the protective member is closer to the folding axis than the flexible window member.

10. The electronic device of claim 1 , wherein the base layer comprises polyimide (PI), polyethylene naphthalate (PEN), or crystalline polyethylene terephthalate (C-PET).

11. The electronic device of claim 1 , wherein the protective member further comprises a light-shielding layer contacting the top surface of the base layer, and
wherein the first adhesive member contacts a top surface of the light-shielding layer.

12. An electronic device comprising:
an electronic panel including an active area and a non-active area around the active area;
a window member on a top surface of the electronic panel;
a protective member on a bottom surface of the electronic panel, the protective member comprising:
a base layer; and
a cushion layer having a porous structure, and being physically coupled directly to a bottom surface of the base layer that is further away from the electronic panel than a top surface of the base layer, a bottom surface of the cushion layer having convex portions such that the bottom surface of the cushion layer is uneven between nearest neighboring convex portions and is rough;

a first adhesive member coupling the electronic panel to the protective member;
a lower protective member between an insulating substrate and the first adhesive member and comprising a polymer material; and
a second adhesive member contacting a bottom surface of the insulating substrate and a top surface of the lower protective member to couple the insulating substrate to the lower protective member,
wherein the first adhesive member contacts a bottom surface of the lower protective member,
wherein the active area of the electronic panel, a portion of the base layer overlapping the active area, and a portion of the cushion layer overlapping the active area are folded along a folding axis,
wherein a surface property of the bottom surface of the base layer is different from that of the top surface of the base layer such that an adhesive force between the cushion layer and the bottom surface of the base layer is greater than an adhesive force between the cushion layer and the top surface of the base layer, and
wherein the cushion layer is formed by directly applying a fluid foam member to the bottom surface of the base layer.

13. The electronic device of claim 12 , wherein the cushion layer comprises synthetic resin foam.

14. The electronic device of claim 12 , wherein the first adhesive member is in contact with the electronic panel, and
wherein the first adhesive member comprises at least one of a pressure sensitive adhesive (PSR), an optical clear adhesive (OCA), or an optical clear resin (OCR).

15. The electronic device of claim 12 , wherein a roughness of the bottom surface of the base layer is greater than a roughness of the top surface of the base layer.

16. The electronic device of claim 12 , wherein the bottom surface of the base layer is more hydrophilic than the top surface of the base layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Sungjune
• Ko Yonggi
• Kim Jinkyu
• Choi Sungchul

Classifications

• B32B27/16

  specially treated, e.g. irradiated · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B2307/728

  Hydrophilic · CPC title

• B32B27/281

  comprising polyimides · CPC title

• B32B27/36

  comprising polyesters · CPC title