Cover glass and display device
A cover glass for covering a display panel of a display device, includes a front surface not to be faced to the display panel, a back surface to be faced the display panel, a front-side chamfered part which is a chamfered part on the side of the front surface, and a back-side chamfered part which is a chamfered part on the side of the back surface. The front-side chamfered part has a surface roughness Ra of more than 100 nm. The back-side chamfered part has a surface roughness Ra of 100 nm or less.
1. A cover glass for covering a display panel of a display device, comprising:
a front surface not to be faced, to the display panel;
a back surface to be faced to the display panel;
a front-side chamfered part which is a chamfered part on the side of the front surface;
a back-side chamfered part which is a chamfered part on the side of the back surface; and
an antireflection on/above the front surface,
wherein the front-side chamfered part has a surface roughness Ra of more than 100 nm, and the back-side chamfered part has a surface roughness Ra of 100 nm or less.
2. The cover glass according to claim 1 , wherein the cover glass is a strengthened glass.
3. The cover glass according to claim 1 , wherein the cover glass is a chemically strengthened glass, having a compressive stress layer having a thickness of 10 μm Or more.
4. The cover glass according to claim 1 , wherein the cover glass is a chemically strengthened glass, having a compressive stress layer having a surface compressive stress of 500 MPa or more.
5. The cover glass according to claim 1 , wherein at least one of the front-side chamfered part and the back-side chamfered part is a C-chamfered part.
6. The cover glass according to claim 1 , having a plate thickness of 0.5 to 2.5 mm.
7. The cover glass according to claim 1 , wherein the front surface or the back surface has a size of from 100 to 900 mm in a longitudinal direction and from 40 to 500 mm in a transverse direction.
8. The cover glass according to claim 1 , wherein the front-side chamfered part has a surface roughness Ra of 140 nm or more.
9. The cover glass according to claim 1 , wherein the front-side chamfered part has a surface roughness Ra of 500 nm or less.
10. The cover glass according to claim 1 , wherein the back-side chamfered part has a surface roughness Ra of 70 nm or less.
11. The cover glass according to claim 1 , wherein the back-side chamfered part has a surface roughness Ra of 0.1 nm or more.
12. Tire cover glass according to claim 1 ,
wherein the cover glass is a laminated glass in which a first glass plate constituting the front surface and a second glass plate constituting the back surface are bonded to each other,
the front-side chamfered part is a chamfered part on the side of the front surface of the first glass plate, and
the back-side chamfered part is a chamfered part on the side of the hack surface of the second glass plate.
13. The cover glass according to claim 1 , which is a cover glass of an on-vehicle display device.
14. The cover glass according to claim 13 , wherein the on-vehicle display device is an on-vehicle display device for rear sheet.
15. A display device comprising the cover glass according to claim 1 .
16. The display device according to claim 15 , which is an on-vehicle display device.
17. The display device according to claim 16 , wherein the on-vehicle display device is an on-vehicle display device for rear sheet.
18. The cover glass according to claim 1 , wherein the front-side chamfered part has a surface roughness Ra of 170 nm or more.