Curved cover glass and method for manufacturing same, and glass member, display device, and curved glass

Patent metadata

Field	Value
Publication number	US-11198634-B2
Application number	US-201715686496-A
Country	US
Kind code	B2
Filing date	Aug 25, 2017
Priority date	Feb 25, 2015
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

A curved cover glass includes a plate-like glass body having a first surface, a second surface facing the first surface and at least one end face. The plate-like glass body has an average thickness of 5 mm or less. Among tangential directions on the first surface at an arbitrary point, when an X-axis is assumed to be a direction in which a first curvature radius R 1 in cross-section of the first surface in an XZ plane is minimum, the first surface has a curvature part in which the surface is bent in the X-axis direction at least at one point on the first surface. The first curvature radius R 1 is 10,000 mm or less. The curvature part includes at least one opening or concave part extending from the first surface to the second surface.

First claim

The invention claimed is:

1. A curved cover glass, comprising:
a plate-like glass body configured to cover a surface of a display unit in a display device and having a first surface, a second surface facing the first surface, and at least one end face connecting the first surface and the second surface such that the plate-like glass body has an average thickness t ave of 5 mm or less and that the first surface has a flat part and a curvature part in which a surface is bent only in a direction of an X-axis at least at one point on the first surface and at least one opening is formed to extend from the first surface to the second surface and positioned to mount the plate-like glass body on the surface of the display unit in the display device; and
an antifouling film formed on the first surface of the plate-like glass body such that the antifouling film is covering at least the curvature part of the first surface of the plate-like glass body,
wherein the X-axis is a tangential direction from an arbitrary point on the first surface such that a first curvature radius R 1 in cross-section of the first surface in an XZ plane passing the X-axis and a Z-axis is minimum and 10,000 mm or less, a Y-axis is orthogonal to the X-axis, and the Z-axis is orthogonal to the X-axis and the Y-axis.

2. A curved cover glass, comprising:
a plate-like glass body configured to cover a surface of a display unit in a display device and having a first surface, a second surface facing the first surface, and at least one end face connecting the first surface and the second surface such that the plate-like glass body having an average thickness t ave of 5 mm or less and that the first surface has a flat part and a curvature part in which a surface is bent in a direction of an X-axis at least at one point on the first surface and at least one opening is formed to extend from the first surface to the second surface and positioned to mount the plate-like glass body on the surface of the display unit in the display device; and
an antifouling film formed on the first surface of the plate-like glass body such that the antifouling film is covering at least the curvature part of the first surface of the plate-like glass body,
wherein the X-axis is a tangential direction from an arbitrary point on the first surface such that a first curvature radius R 1 in cross-section of the first surface in an XZ plane passing the X-axis and a Z-axis is minimum and 10,000 mm or less, a Y-axis is orthogonal to the X-axis, and the Z-axis is orthogonal to the X-axis and the Y-axis.

3. The curved cover glass according to claim 1 , wherein a maximum diameter d in a two-dimensional projected shape of the opening is 50 mm or less.

4. The curved cover glass according to claim 2 , wherein a maximum diameter d in a two-dimensional projected shape of the opening is 50 mm or less.

5. The curved cover glass according to claim 1 , wherein a ratio d/L of a maximum diameter d (mm) in a two-dimensional projected shape of the opening to a maximum length L (mm) of the curvature part in a two-dimensional projected shape of the first surface is 0.6 or less.

6. The curved cover glass according to claim 2 , wherein a ratio d/L of a maximum diameter d (mm) in a two-dimensional projected shape of the opening to a maximum length L (mm) of the curvature part in a two-dimensional projected shape of the first surface is 0.6 or less.

7. The curved cover glass according to claim 1 , wherein an angle θ formed by an axis of the opening extending from the first surface to the second surface and a normal line of the first surface in a portion in which the opening is provided is 0°≤θ≤60°.

8. The curved cover glass according to claim 2 , wherein an angle θ formed by an axis of the opening extending from the first surface to the second surface and a normal line of the first surface in a portion in which the opening is provided is 0°≤θ≤60°.

9. The curved cover glass according to claim 1 , wherein an angle formed by an axis of the opening extending from the first surface to the second surface and a normal line of the first surface in a portion in which the opening is provided is 5°≤θ≤60°.

10. The curved cover glass according to claim 2 , wherein an angle θ formed by an axis of the opening extending from the first surface to the second surface and a normal line of the first surface in a portion in which the opening is provided is 5°≤θ≤60°.

11. A curved cover glass, comprising:
a plate-like glass body configured to cover a surface of a display unit in a display device and having a first surface, a second surface facing the first surface, and at least one end face connecting the first surface and the second surface such that the plate-like glass body has an average thickness t ave of 5 mm or less and that the first surface has a flat part and a curvature part in which a surface is bent only in a direction of an X-axis at least at one point on the first surface and at least one concave part is formed to have, as a two-dimensional projected shape, a substantially circular shape, a substantially oval shape, a substantially semicircular shape or a substantially semi-oval shape, with a maximum length in the two-dimensional projected shape being from 1.5 to 200 mm and positioned to mount the plate-like glass body on the surface of the display unit in the display device; and
an antifouling film formed on the first surface of the plate-like glass body such that the antifouling film is covering at least the curvature part of the first surface of the plate-like glass body,
wherein the X-axis is a tangential direction from an arbitrary point on the first surface such that a first curvature radius R 1 in cross-section of the first surface in an XZ plane passing the X-axis and a Z-axis is minimum and 10,000 mm or less, a Y-axis is orthogonal to the X-axis, and the Z-axis is orthogonal to the X-axis and the Y-axis.

12. A curved cover glass, comprising:
a plate-like glass body configured to cover a surface of a display unit in a display device and having a first surface, a second surface facing the first surface, and at least one end face connecting the first surface and the second surface such that the plate-like glass body has an average thickness t ave of 5 mm or less and that the first surface has a flat part and a curvature part in which a surface is bent in a direction of an X-axis at least at one point on the first surface and at least one concave part is formed to have, as a two-dimensional projected shape, a substantially circular shape, a substantially oval shape, a substantially semicircular shape or a substantially semi-oval shape, with a maximum length in the two-dimensional projected shape being from 1.5 to 200 mm and positioned to mount the plate-like glass body on the surface of the display unit in the display device; and
an antifouling film formed on the first surface of the plate-like glass body such that the antifouling film is covering at least the curvature part of the first surface of the plate-like glass body,
wherein the X-axis is a tangential direction from an arbitrary point on the first surface such that a first curvature radius R 1 in cross-section of the first surface in an XZ plane passing the X-axis and a Z-axis is minimum and 10,000 mm or less, a Y-axis is orthogonal to the X-axis, and the Z-axis is orthogonal to the X-axis and the Y-axis.

13. The curved cover glass according to claim 11 , wherein the concave part is provided in a portion adjacent to the end face of the first surface or in a portion 5 mm or more away from the end face of the first surface.

14. The curved cover glass according to claim 12 , wherei

Assignees

• Agc Inc

Inventors

• Moriya Koki
• Ono Takeaki

Classifications

• C03B23/0252

  by gravity only, e.g. sagging (C03B23/035 takes precedence) · CPC title

• C03C21/002

  to perform ion-exchange between alkali ions (C03C21/005 takes precedence) · CPC title

• C03B23/03

  by press-bending between shaping moulds · CPC title

• C03B23/025

  by gravity · CPC title

• B28D1/14

  by boring or drilling (rotary drilling machines B23B; {tools for drilling machines B23B51/00}; portabe percussive machines B25D; {rotary drilling machines for mining or quarrying E21B3/00}) · CPC title