Cover window, method of manufacturing the same, and display device having the same

Patent metadata

Field	Value
Publication number	US-11871604-B2
Application number	US-202117223358-A
Country	US
Kind code	B2
Filing date	Apr 6, 2021
Priority date	Jul 16, 2020
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

A cover window includes a base layer including a bending portion bent about a bending axis extending in one direction, a first flat portion, and a second flat portion spaced apart from the first flat portion with the bending portion interposed therebetween in a direction crossing the one direction and facing each other and a first coating portion disposed on the bending portion and having a first modulus less than a modulus of the base layer.

First claim

What is claimed is:

1. A cover window comprising:
a base layer comprising a bending portion bent about a bending axis extending in one direction, a first flat portion, and a second flat portion spaced apart from the first flat portion with the bending portion interposed therebetween in a direction crossing the one direction and facing each other; and
a first coating portion disposed on the bending portion of the base layer and having a first modulus less than a modulus of the base layer,
wherein a thickness of the first coating portion is less than a thickness of the base layer, and the thickness of the first coating portion is equal to or greater than about 50 μm and equal to or less than about 300 μm.

2. The cover window of claim 1 , wherein a thickness of a center portion of the first coating portion, which overlaps the bending axis, is greater than a thickness of opposing end portions of the first coating portion, which are opposite to each other.

3. The cover window of claim 1 , wherein the thickness of the first coating portion is equal to or greater than about 50 μm and equal to or less than about 150 μm.

4. The cover window of claim 1 , wherein the first coating portion comprises at least one selected from polypropylene, polyethylene, and polyethylene terephthalate.

5. The cover window of claim 1 , wherein the first coating portion is in contact with the bending portion.

6. The cover window of claim 1 , further comprising:
a second coating portion disposed on the first flat portion and the second flat portion,
wherein the second coating portion has a second modulus equal to or greater than the first modulus and less than the modulus of the base layer.

7. The cover window of claim 6 , wherein the second coating portion is disposed under the first coating portion and covers an entire surface of the base layer.

8. The cover window of claim 7 , further comprising:
a third coating portion disposed between the first coating portion and the second coating portion to cover the second coating portion,
wherein the third coating portion has a modulus equal to the first modulus, and the second modulus is greater than the first modulus.

9. The cover window of claim 6 , wherein the second coating portion comprises:
a first sub-coating portion disposed on the first flat portion; and
a second sub-coating portion disposed on the second flat portion,
wherein the first sub-coating portion and the second sub-coating portion are spaced apart from each other with the first coating portion interposed therebetween.

10. The cover window of claim 9 , wherein the first coating portion has a thickness equal to a thickness of the second coating portion.

11. The cover window of claim 9 , wherein a thickness of the first coating portion is greater than a thickness of the second coating portion.

12. The cover window of claim 1 , wherein the base layer comprises a glass material.

13. The cover window of claim 1 , wherein the thickness of the base layer is equal to or greater than about 0.1 mm and equal to or less than about 1.0 mm.

14. A display device comprising:
a display panel comprising a bending area bent about a bending axis extending in one direction, a first flat area, and a second flat area spaced apart from the first flat area with the bending area interposed therebetween in a direction crossing the one direction and facing each other;
a cover window disposed on the display panel; and
an adhesive layer disposed between the display panel and the cover window, and
the cover window comprising:
a base layer comprising a first flat portion corresponding to the first flat area, a bending portion corresponding to the bending area, and a second flat portion corresponding to the second flat area; and
a first coating portion disposed on the bending portion of the base layer and having a first modulus less than a modulus of the base layer,
wherein a thickness of the first coating portion is less than a thickness of the base layer, and the thickness of the first coating portion is equal to or greater than about 50 μm and equal to or less than about 300 μm.

15. The display device of claim 14 , wherein the thickness of the first coating portion is equal to or greater than about 50 μm and equal to or less than about 150 μm.

16. The display device of claim 14 , wherein a thickness of a center portion of the first coating portion, which overlaps the bending axis, is greater than a thickness of opposing end portions of the first coating portion, which are opposite to each other.

17. The display device of claim 14 , further comprising:
a second coating portion disposed on the first flat portion and the second flat portion,
wherein the second coating portion has a second modulus equal to or greater than the first modulus and less than the modulus of the base layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kang Byunghoon
• Kim Seungho
• Shim Gyuin
• Kim Seung

Classifications

• H10K50/844 Primary

  Encapsulations · CPC title

• B32B17/06 Primary

  comprising glass as the main or only constituent of a layer, next to another layer of a specific {material} · CPC title

• B32B7/12

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

• C03C17/324

  Polyesters · CPC title

• C03C17/328

  Polyolefins · CPC title