Cover window protective film and display device including the same

Patent metadata

Field	Value
Publication number	US-12550586-B2
Application number	US-202117213373-A
Country	US
Kind code	B2
Filing date	Mar 26, 2021
Priority date	Jul 9, 2020
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A cover window protective film includes a base layer, and a first protective layer disposed on the base layer, where the first protective layer includes a lower surface adjacent to the base layer and an upper surface opposite to the lower surface, and the first protective layer includes a fluorine-based compound, and has an atomic ratio of fluorine (F) gradually increasing from the lower surface toward the upper surface.

First claim

What is claimed is:

1 . A display device, comprising:
a display panel; and a front laminate structure disposed on a front surface of the display panel, wherein the front laminate structure includes a cover window and a cover window protective film attached onto the cover window, the cover window protective film includes a base layer and a first protective layer disposed on the base layer, wherein the first protective layer includes a fluorine-based compound comprising a first polymer and a second polymer, which is fluorine-based and has anti-fingerprint characteristics, the first protective layer includes a lower surface adjacent to the base layer and an upper surface opposite to the lower surface, the second polymer being crosslinked with the first polymer and polymerized within a body of the first protective layer to form fluorinated chains extending up to and through the upper surface, and the first protective layer has an atomic ratio of fluorine (F) higher at the upper surface of the first protective layer than at the lower surface of the first protective layer.

2 . The display device of claim 1 ,
wherein the front laminate structure further includes a polarization member disposed between the display panel and the cover window, and a polarization member coupling member which attaches the polarization member to the front surface of the display panel.

3 . The display device of claim 2 ,
wherein the front laminate structure further includes a shock absorbing layer disposed between the polarization member and the cover window, and a shock absorbing layer coupling member which attaches the shock absorbing layer onto the polarization member.

4 . The display device of claim 1 , further comprising:
a back laminate structure disposed on a back surface of the display panel, and the back laminate structure includes a polymer film layer disposed behind the display panel, a cushion layer disposed behind the polymer film layer, a plate disposed behind the cushion layer, and a heat dissipation member disposed behind the plate.

5 . The display device of claim 1 ,
wherein an atomic ratio of fluorine (F) at the upper surface of the first protective layer is in a range of about 10 at % to about 40 at %, the first protective layer further includes carbon (C), a ratio of the atomic ratio of fluorine (F) to the atomic ratio of carbon (C) at the upper surface of the first protective layer is in a range of about 0.15 to about 1.20, and the atomic ratio of fluorine (F) and the atomic ratio of carbon (C) are values measured by X-ray photoelectron spectroscopy.

6 . The display device of claim 1 ,
wherein the upper surface of the first protective layer has a modulus in a range of about 4.5 GPa to about 10 GPa, the upper surface of the first protective layer has a hardness in a range of about 0.35 GPa to about 1.00 GPa, and the modulus and hardness are values measured by a nanoindenter.

7 . The display device of claim 1 ,
wherein the first protective layer has a thickness in a range of about 2 μm to about 7 μm.

8 . The display device of claim 1 , further comprising:
a second protective layer disposed on the upper surface of the first protective layer, wherein an upper surface of the second protective layer has a modulus in a range of about 4.5 GPa to about 10 GPa and a hardness in a range of about 0.35 GPa to about 1.00 GPa.

9 . The display device of claim 1 ,
wherein the display panel displays an image in a forward direction.

10 . The display device of claim 1 ,
wherein the display device is an in-foldable display device, in which a display surface is folded inward, or an out-foldable display device, in which the display surface is folded outward.

11 . A display device, comprising:
a display panel; and a front laminate structure disposed on a front surface of the display panel, wherein the front laminate structure includes a cover window and a cover window protective film attached onto the cover window, the cover window protective film includes a base layer and a first protective layer disposed on the base layer, wherein the first protective layer includes a fluorine-based compound, the first protective layer includes a lower surface adjacent to the base layer and an upper surface opposite to the lower surface, and the first protective layer has an atomic ratio of fluorine (F) higher at the upper surface of the first protective layer than at the lower surface of the first protective layer and gradually increasing from the lower surface toward the upper surface.

12 . The display device of claim 11 ,
wherein the atomic ratio of fluorine (F) is the highest at the upper surface of the first protective layer, and wherein the atomic ratio of fluorine (F) at the upper surface of the first protective layer is in a range of about 10 at % to about 40 at %.

13 . The display device of claim 12 ,
wherein the first protective layer further includes carbon (C), and a ratio of the atomic ratio of fluorine (F) to the atomic ratio of carbon (C) at the upper surface of the first protective layer is in a range of about 0.15 to about 1.20.

14 . The display device of claim 13 ,
wherein the atomic ratio of fluorine (F) and the atomic ratio of carbon (C) are values measured by X-ray photoelectron spectroscopy.

15 . The display device of claim 11 ,
wherein the upper surface of the first protective layer has a modulus in a range of about 4.5 GPa to about 10 GPa.

16 . The display device of claim 15 ,
wherein the upper surface of the first protective layer has a hardness in a range of about 0.35 GPa to about 1.00 GPa.

17 . The display device of claim 16 ,
wherein the modulus and hardness are values measured by a nanoindenter.

18 . The display device of claim 11 ,
wherein the first protective layer has a thickness in a range of about 2 μm to about 7 μm.

19 . The display device of claim 11 , further comprising:
a second protective layer disposed on the upper surface of the first protective layer, wherein an upper surface of the second protective layer has a modulus in a range of about 4.5 GPa to about 10 GPa and a hardness in a range of about 0.35 GPa to about 1.00 GPa.

20 . An electronic device, comprising:
a display panel; and a front laminate structure disposed on a front surface of the display panel, wherein the front laminate structure includes a cover window and a cover window protective film attached onto the cover window, the cover window protective film includes a base layer and a first protective layer disposed on the base layer, wherein the first protective layer includes a fluorine-based compound comprising a first polymer and a second polymer, which is fluorine-based and has anti-fingerprint characteristics, the first protective layer includes a lower surface adjacent to the base layer and an upper surface opposite to the lower surface, the second polymer being crosslinked with the first polymer and polymerized within a body of the first protective layer to form fluorinated chains extending up to and through the upper surface, and the first protective layer has an atomic ratio of fluorine (F) higher at the upper surface of the first protective layer than at the lower surface of the first protective layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Jun Su
• Lee Hyun Ju
• Cha Eun Kyeong
• Park Young Gil
• Ahn Na Ri
• Jeong Soo Im

Classifications

• H10K59/873

  Encapsulations · CPC title

• G06F1/203

  for portable computers, e.g. for laptops · CPC title

• G06F1/1652

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title

• B32B2457/20

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

• B32B2307/536

  Hardness · CPC title