Cover member and display device
To provide a cover member excellent in edge safety, and a display device in which said cover member is used. A cover member which covers a display panel of a display device and which has a front surface that does not face the display panel and a rear surface that faces the display panel, said cover member being a laminate in which a first glass plate constituting said front surface and a second glass plate constituting said rear surface are bonded via an intermediate film interposed therebetween, wherein the first glass plate has a first inside chamfer which is a chamfer on the intermediate film side, and the first inside chamfer and the second glass plate or the intermediate film are bonded by a resin.
1. A cover member, which is a laminate comprising:
a first glass plate forming a front surface of the cover member;
a second glass plate forming a rear surface of the cover member; and
an intermediate film interposed between the first and second glass plates and bonding the first and second glass plates such that an adhesive force between the first glass plate and the intermediate film is larger than an adhesive force between the second glass plate and the intermediate film, wherein
the first glass plate has a first surface adjacent to the intermediate film, the second glass plate has a second surface adjacent to the intermediate film, and the first surface has a surface roughness different from a surface roughness of the second surface,
the first glass plate has a first inside chamfer on a side of the intermediate film,
the first inside chamfer is bonded to the second glass plate or the intermediate film by a resin, and
the cover member is suitable for covering a display panel of a display device such that the front surface does not face the display panel and the rear surface faces the display panel.
2. The cover member according to claim 1 , wherein a surface roughness Ra of the first inside chamfer is at least 100 nm.
3. The cover member according to claim 1 , wherein the second glass plate has a second inside chamfer on a side of the intermediate film, and
the resin is adhered to the second inside chamfer.
4. The cover member according to claim 1 , wherein a protruding amount of the resin from side surface positions of the first glass plate and the second glass plate is at most 0.1 mm.
5. The cover member according to claim 1 , wherein the resin is the same resin as a resin constituting the intermediate film.
6. The cover member according to claim 1 , wherein a surface roughness Ra of the first inside chamfer is at most 500 nm.
7. The cover member according to claim 1 , wherein the first glass plate is a tempered glass.
8. The cover member according to claim 7 , wherein the tempered glass is a chemically tempered glass having a compressive stress layer with a thickness of at least 10 μm.
9. The cover member according to claim 1 , wherein each of the first and second glass plates has a thickness of from 0.5 to 2.5 mm.
10. The cover member according to claim 1 , wherein the intermediate film comprises at least one selected from the group consisting of polyvinyl butyral and ethylene vinyl acetate.
11. The cover member according to claim 5 , wherein the intermediate film comprises at least one selected from the group consisting of polyvinyl butyral and ethylene vinyl acetate.
12. The cover member according to claim 1 , wherein the resin comprises at least one selected from the group consisting of an acrylic resin, a silicone resin, an urethane acrylate resin and an epoxy resin.
13. The cover member according to claim 1 , wherein each of the first and second glass plates has a thickness of from 1.3 to 2.5 mm.
14. The cover member according to claim 1 , wherein the first surface of the first glass plate has a surface roughness Ra which is greater than a surface roughness Ra of the second surface of the second glass plate.
15. The cover member according to claim 1 , wherein the first surface of the first glass plate has surface roughness Ra, Rz, Sa, and Sz which are greater than surface roughness Ra, Rz, Sa, and Sz of the second surface of the second glass plate, respectively.
16. The cover member according to claim 1 , wherein the adhesive force between the first glass plate and the intermediate film is at least 23 N/25 mm, and the adhesive force between the second glass plate and the intermediate film is at least 5.7 N/25 mm.
17. The cover member according to claim 5 , wherein the intermediate film consists of the resin.
18. The cover member according to claim 1 , wherein the intermediate film consists of polyvinyl butyral or ethylene vinyl acetate.
19. A display device, comprising:
a cover member of claim 1 ; and
the display panel.
20. The display device according to claim 19 , which is an in-vehicle display device.