Window and display device including the same

Patent metadata

Field	Value
Publication number	US-12534394-B2
Application number	US-202318236874-A
Country	US
Kind code	B2
Filing date	Aug 22, 2023
Priority date	Oct 25, 2022
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A display device includes: a display panel; and a window on the display panel, wherein the window includes a glass substrate having a thickness of 20 micrometers (μm) to 100 μm, and the glass substrate contains, on a basis of an entirety of the glass substrate, more than 75 mol % and less than 85 mol % of SiO 2 , more than 10 mol % and less than 20 mol % of Na 2 O, and more than 0 mol % and less than 10 mol % of CaO, respectively.

First claim

What is claimed is:

1 . A window comprising:
a glass substrate having a thickness in a range of 20 micrometers (μm) to 100 μm, wherein the glass substrate contains, on a basis of an entirety of the glass substrate, more than 75 mol % and less than 85 mol % of SiO 2 , more than 10 mol % and less than 20 mol % of Na 2 O, and more than 3 mol % and less than 10 mol % of CaO.

2 . The window of claim 1 , wherein the glass substrate has a hardness of greater than 4.5 GPa and less than 5.0 GPa.

3 . The window of claim 1 , wherein the glass substrate has a brittleness of greater than 4.8 μm −0.5 and less than 5.8 μm −0.5 .

4 . The window of claim 1 , wherein the glass substrate has a Young's modulus of greater than 60 GPa and less than 70 GPa.

5 . The window of claim 1 , wherein the glass substrate has a coefficient of thermal expansion of greater than 85×10 −7 /K and less than 95×10 −7 /K.

6 . The window of claim 1 , wherein the glass substrate has a fracture toughness of greater than 0.7 MPa·m 0.5 and less than 1.2 MPa·m 0.5 .

7 . The window of claim 1 , wherein the glass substrate has a glass transition temperature of greater than 500° C. and less than 600° C.

8 . The window of claim 1 , wherein the glass substrate has a Poisson's ratio of greater than 0.18 and less than 0.22.

9 . The window of claim 1 , wherein the glass substrate has a density of greater than 2.3 g/cm 3 and less than 2.6 g/cm 3 .

10 . A window comprising:
a glass substrate having a thickness of 20 micrometers (μm) to 100 μm, wherein the glass substrate contains, on a basis of an entirety of the glass substrate, 78 mol % or more and less than 85 mol % of SiO 2 , an alkali oxide, and an alkaline earth metal oxide, and has a ratio of moles of Al 2 O 3 to moles of the alkali oxide that is equal to zero.

11 . The window of claim 10 , wherein the glass substrate contains more than 13 mol % and less than 18 mol % of the alkali oxide on a basis of an entirety of the glass substrate.

12 . The window of claim 10 , wherein the glass substrate contains more than 0 mol % and less than 10 mol % of the alkaline earth metal oxide on a basis of an entirety of the glass substrate.

13 . The window of claim 10 , wherein the alkali oxide is Na 2 O.

14 . The window of claim 13 , wherein the glass substrate contains more than 10 mol % and less than 20 mol % of the Na 2 O, on a basis of an entirety of the glass substrate.

15 . The window of claim 10 , wherein the alkaline earth metal oxide is CaO.

16 . The window of claim 15 , wherein the glass substrate contains more than 0 mol % and less than 10 mol % of the CaO, on a basis of an entirety of the glass substrate.

17 . The window of claim 10 , wherein the glass substrate has a hardness of greater than 4.5 GPa and less than 5.0 GPa, and has a brittleness of greater than 4.8 μm −0.5 and less than 5.8 μm −0.5 .

18 . A display device comprising:
a display panel; and a window on the display panel, wherein the window includes a glass substrate having a thickness of 20 micrometers (μm) to 100 μm, and the glass substrate contains, on a basis of an entirety of the glass substrate, more than 75 mol % and less than 85 mol % of SiO 2 , more than 10 mol % and less than 20 mol % of Na 2 O, and more than 3 mol % and less than 10 mol % of CaO, respectively.

19 . The display device of claim 18 , wherein the glass substrate has a hardness of greater than 4.5 GPa and less than 5.0 GPa, and has a brittleness of greater than 4.8 μm −0.5 and less than 5.8 μm −0.5 .

20 . The display device of claim 18 , further comprising an adhesive layer between the display panel and the window.

Assignees

• Samsung Display Co Ltd
• Kongju National Univ Industry—Univ Cooperation Foundation

Inventors

• Lee Jaegil
• Chung Woonjin
• Kim Seung
• Kim Seungho
• Park Cheolmin
• Shim Gyuin
• Jang Jin-Won
• Jung Somi
• Shon Hui Yeon
• Kang Mingyeong
• Park Kyeongdae
• Park Seongyoung

Classifications

• B32B2457/20

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

• B32B2307/7376

  Thickness · CPC title

• B32B2307/72

  Density · CPC title

• B32B2307/558

  Impact strength, toughness · CPC title

• B32B2307/552

  Fatigue strength · CPC title