Window substrate and display device having the same

Patent metadata

Field	Value
Publication number	US-10216230-B2
Application number	US-201715625407-A
Country	US
Kind code	B2
Filing date	Jun 16, 2017
Priority date	Aug 10, 2016
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

A window substrate includes a glass substrate including first and second surfaces opposite to each other, the glass substrate having a thickness of about 25 μm to about 100 μm, and a coating layer disposed on the first surface. The glass substrate includes SiO 2 , Al 2 O 3 and Na 2 O, and the mole ratio of Al 2 O 3 /Na 2 O is equal to or smaller than 1.

First claim

What is claimed is:

1. A window substrate, comprising:
a plurality of glass substrates each including first and second surfaces opposite to each other, each of the glass substrates having a thickness of about 25 μm to about 100 μm;
a coating layer disposed on the first surface of each of the plurality of glass substrates, wherein each of the plurality of glass substrates includes SiO 2 , Al 2 O 3 and Na 2 O, and a mole ratio of Al 2 O 3 /Na 2 O is equal to or smaller than 1; and
an optically transparent adhesive disposed between adjacent glass substrates of the plurality of glass substrates.

2. The window substrate of claim 1 , wherein the coating layer has a thickness equal to or smaller than about 50 μm.

3. The window substrate of claim 2 , wherein the coating layer has an elastic modulus of about 10 GPa or less.

4. The window substrate of claim 3 , wherein the coating layer includes at least one of urethane resin, epoxy resin, polyester resin, polyether resin, acrylate resin, acrylonitrile-butadiene-styrene (ABS) resin, or rubber.

5. The window substrate of claim 2 , wherein a difference between a first repulsive force against deformation of each of the plurality of glass substrates and a second repulsive force against deformation of each of the plurality of glass substrates together with the coating layer is 50% or less of the first repulsive force.

6. The window substrate of claim 1 , wherein, in each of the plurality of glass substrates, the mole ratio of the Al 2 O 3 /Na 2 O is equal to 1.0 or 0.33.

7. The window substrate of claim 1 , further comprising a plurality of coating layers, wherein each of the plurality of coating layers is disposed on a respective glass substrate of the plurality of glass substrates.

8. The window substrate of claim 1 , wherein each of the plurality of glass substrates has a recess in the first surface or the second surface.

9. The window substrate of claim 8 , wherein the recess is filled by the coating layer.

10. The window substrate of claim 1 , wherein the coating layer includes a protrusion protruding from a first surface of the coating layer, opposite to a second surface of the coating layer, wherein the second surface of the coating layer is disposed adjacent to each of the plurality of glass substrates.

11. The window substrate of claim 1 , wherein the Al 2 O 3 is contained at about 1 mol % to about 10 mol %, the Na 2 O is contained at about 10 mol % to about 20 mol %, and the SiO 2 is contained at about 55 mol % to about 70 mol %.

12. The window substrate of claim 1 , wherein each of the plurality of glass substrates includes a first region extending from the first surface to a first depth inside the glass substrate, the first region having a first compressive stress.

13. The window substrate of claim 12 , wherein the first depth is equal to or greater than 1 μm, and the first compressive stress is about 600 MPa to about 1200 MPa.

14. The window substrate of claim 13 , wherein each of the plurality of glass substrates further includes a second region extending from the second surface of the glass substrates, wherein the second region has a second compressive stress, wherein the first and second depths are different from each other and the first and second compressive stresses are different from each other.

15. The window substrate of claim 1 , wherein the window substrate has a transmittance of 90% or more.

16. The window substrate of claim 1 , wherein, the window substrate has a repulsive force of about 10 N or less in a deformation of the window substrate.

17. The window substrate of claim 1 , wherein a yellow index variation of the window substrate is equal to or smaller than 1.0 when the window substrate is exposed to ultraviolet B (UVB) light, having a wavelength of 280 nm to 360 nm, for 72 hours.

18. The window substrate of claim 1 , further comprising a cover layer disposed on the second surface of the glass substrates.

19. The window substrate of claim 18 , wherein the cover layer is an anti-reflection layer, an anti-stain layer, or an anti-fingerprint layer.

20. The window substrate of claim 1 , wherein at least a portion of the window substrate has flexibility.

21. A display device, comprising:
a display panel displaying an image on a first surface thereof; and

a window substrate disposed on the first surface of the display panel,
wherein the window substrate includes:
a glass substrate including first and second surfaces opposite to each other, the glass substrate having a thickness of about 25 μm to about 100 μm; and
a coating layer disposed on the first surface of the glass substrate,
wherein the coating layer has a thickness equal to or smaller than about 50 μm, and the coating layer is disposed between the glass substrate and the display panel,
wherein the glass substrate includes SiO 2 , Al 2 O 3 and Na 2 O, and the mole ratio of Al 2 O 3 /Na 2 O is equal to 1 or 0.33.

22. The display device of claim 21 , wherein the coating layer has a thickness equal to or smaller than about 10 μm.

23. The display device of claim 21 , wherein, in the glass substrate, the mole ratio of the Al 2 O 3 /Na 2 O is equal to or smaller than 0.5.

24. The display device of claim 21 , wherein the coating layer includes at least one of urethane resin, epoxy resin, polyester resin, polyether resin, acrylate resin, acrylonitrile-butadiene-styrene (ABS) resin, or rubber.

25. The display device of claim 21 , further comprising a plurality of glass substrates.

26. The display device of claim 21 , further comprising an optically transparent adhesive disposed between the display panel and the window substrate.

27. The display device of claim 26 , wherein the optically transparent adhesive has an adhesion of about 500 gf/in or more, a storage modulus of about 100 MPa or less, and a creep of about 50% to about 800%.

28. The display device of claim 21 , further comprising a cover layer disposed on the second surface of the glass substrate.

29. The display device of claim 28 , wherein the cover layer is an anti-reflection layer, an anti-stain layer, or an anti-fingerprint layer.

30. A display device, comprising:
a display panel displaying an image on a first surface thereof; and

a window substrate disposed on the first surface of the display panel,
wherein the window substrate includes:
a glass substrate including first and second surfaces opposite to each other, the glass substrate having a thickness of about 25 μm to about 100 μm; and
a coating layer disposed on the first surface of the glass substrate,
wherein the coating layer has a thickness equal to or smaller than about 50 μm, and the coating layer is disposed between the glass substrate and the display panel,
wherein the glass substrate includes SiO 2 , Al 2 O 3 and Na 2 O, and the mole ratio of Al 2 O 3 /Na 2 O is equal to or smaller than 1,
wherein the display panel and the window substrate include a first area having flexibility and a second area adjacent to the first area.

31. The display device of claim 30 , wherein the glass substrate has different thicknesses in the first area and the second area.

32. The display device of claim 30 , wherein the glass substrate has a recess in the first surface or the second surface.

33. The display d

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Myung Hwan
• Park Ik Hyung
• Hwang Seong Jin
• Kim Sung Chul
• Lee Jang Doo
• Lee Jong Hyuk

Classifications

• H10W70/688

  Flexible insulating substrates · CPC title

• H01L27/32

  Electricity · mapped topic

• H01L51/0097

  Electricity · mapped topic

• H01L23/4985

  Electricity · mapped topic

• H05K5/0017

  with operator interface units · CPC title