Cover window and display apparatus including the same

Patent metadata

Field	Value
Publication number	US-12386104-B2
Application number	US-202318295562-A
Country	US
Kind code	B2
Filing date	Apr 4, 2023
Priority date	Sep 25, 2020
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A cover window includes a window substrate having a first hardness and including polyvinylidene fluoride (PVDF), and a hard coating layer on at least one surface of the window substrate and having a second hardness which is greater than that of the window substrate.

First claim

What is claimed is:

1. A cover window comprising:
a window substrate having a first hardness and comprising polyvinylidene fluoride (PVDF); and
a hard coating layer on at least one surface of the window substrate and having a second hardness which is greater than that of the window substrate,
wherein the window substrate comprises a copolymer of a first polymer resin and the PVDF, and
wherein a ratio of the first polymer resin and the PVDF is such that a relative permittivity of the window substrate has a value from about 3 to about 6.

2. The cover window of claim 1 ,
wherein the first polymer resin is polymethyl methacrylate (PMMA).

3. The cover window of claim 1 ,
wherein a thickness of the window substrate has a value from about 100 μm to about 650 μm.

4. The cover window of claim 1 ,
wherein the hard coating layer comprises a first hard coating layer that is on a first surface of the window substrate and has a thickness less than that of the window substrate.

5. The cover window of claim 4 ,
wherein the thickness of the first hard coating layer has a value from about 10 μm to about 50 μm.

6. The cover window of claim 4 ,
wherein a hardness of the first hard coating layer is greater than that of the window substrate, and
wherein when the hardness of the first hard coating layer is measured in a pencil hardness, the hardness of the first hard coating layer has a value of at least 7H.

7. The cover window of claim 4 ,
wherein the hard coating layer further comprises a second hard coating layer on a second surface opposite to the first surface of the window substrate.

8. The cover window of claim 7 ,
wherein a thickness of the second hard coating layer has a value from about 5 μm to about 20 μm.

9. The cover window of claim 1 ,
wherein the hard coating layer comprises polysilsesquioxane or an acrylic polymer material.

10. The cover window of claim 1 ,
wherein the sum of a thickness of the window substrate and a thickness of the hard coating layer has a value from about 150 μm to about 700 μm.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Dongsung
• Seo Hyunseung
• Yun Hyunkyung
• Ko Jihyun

Classifications

• B32B27/304

  comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF · CPC title

• B32B2270/00

  Resin or rubber layer containing a blend of at least two different polymers · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• G06F3/0445

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title