Glass substrate, cover glass, assembly, assembly manufacturing method, in-vehicle display device, and in-vehicle display device manufacturing method

Abstract

A glass substrate includes a thin portion having a first surface and a second surface opposed to the first surface, a thick portion having a first surface and a second surface opposed to the first surface and having a sheet thickness t3 that is larger than a sheet thickness t2 of the thin portion, a connection portion having a first connection surface and a second connection surface, the first connection surface connecting the first surface of the thin portion to the first surface of the thick portion, the second connection surface connecting the second surface of the thin portion to the second surface of the thick portion. The first connection surface has a curvature radius of more than or equal to 400 μm.

1 . A glass substrate comprising:
 a thin portion having a first surface and a second surface opposed to the first surface;   a thick portion having a first surface and a second surface opposed to the first surface and having a sheet thickness t 3  that is larger than a sheet thickness t 2  of the thin portion; and   a connection portion having a first connection surface and a second connection surface, the first connection surface connecting the first surface of the thin portion to the first surface of the thick portion, the second connection surface connecting the second surface of the thin portion to the second surface of the thick portion,   wherein the first connection surface has a curvature radius of more than or equal to 400 μm.   
     
     
         2 . A glass substrate comprising:
 a thin portion having a first surface and a second surface opposed to the first surface;   a thick portion having a first surface and a second surface opposed to the first surface and having a sheet thickness t 3  that is larger than a sheet thickness t 2  of the thin portion; and   a connection portion having a first connection surface and a second connection surface, the first connection surface connecting the first surface of the thin portion to the first surface of the thick portion, the second connection surface connecting the second surface of the thin portion to the second surface of the thick portion,   wherein a sheet thickness t 4  that is a sheet thickness of the thinnest portion in the connection portion is thinner than the sheet thickness t 2  of the thin portion.   
     
     
         3 . The glass substrate according to  claim 2 , wherein the sheet thickness t 4  of the connection portion is less than or equal to 0.5 mm. 
     
     
         4 . The glass substrate according to  claim 1 , wherein the sheet thickness t 2  of the thin portion is 0.05 mm or more and 0.8 mm or less, and the sheet thickness t 3  of the thick portion is 0.5 mm or more and 2.5 mm or less. 
     
     
         5 . The glass substrate according to  claim 1 , wherein the connection portion comprises an overhang part. 
     
     
         6 . The glass substrate according to  claim 1 , wherein the glass substrate is a chemically strengthened glass. 
     
     
         7 . A cover glass comprising the glass substrate according to  claim 1  and configured to cover a display panel. 
     
     
         8 . An assembly comprising:
 an uneven structure; and   
       the glass substrate according to  claim 1  that is assembled to the uneven structure,
 wherein the thin portion of the glass substrate is assembled to the uneven structure with the thin portion elastically deformed according to a shape of the uneven structure. 
 
     
     
         9 . A method of manufacturing an assembly, the method comprising
 assembling the glass substrate according to  claim 1  to an uneven structure,   wherein the thin portion of the glass substrate is elastically deformed according to a shape of the uneven structure and assembled to the uneven structure.   
     
     
         10 . An in-vehicle display device comprising:
 an instrument cluster provided in front of a driving seat;   a center information display provided in front of an area between the driving seat and a passenger seat; and   the glass substrate according to  claim 1 ,   wherein the instrument cluster comprises an uneven structure,   wherein the thin portion of the glass substrate is assembled to the uneven structure with the thin portion elastically deformed according to a shape of the uneven structure, and   wherein the thick portion of the glass substrate is assembled to the center information display.   
     
     
         11 . A method of manufacturing an in-vehicle display, the method comprising assembling the glass substrate according to  claim 1  to an instrument cluster provided in front of a driving seat and a center information display provided in front of an area between the driving seat and a passenger seat,
 wherein the instrument cluster comprises uneven structure, 
 wherein the thin portion of the glass substrate is elastically deformed according to a shape of the uneven structure and assembled to the uneven structure, and 
 wherein the thick portion of the glass substrate is assembled to the center information display. 
 
     
     
         12 . The glass substrate according to  claim 2 , wherein the sheet thickness t 2  of the thin portion is 0.05 mm or more and 0.8 mm or less, and the sheet thickness t 3  of the thick portion is 0.5 mm or more and 2.5 mm or less. 
     
     
         13 . The glass substrate according to  claim 2 , wherein the connection portion comprises an overhang part. 
     
     
         14 . The glass substrate according to  claim 2 , wherein the glass substrate is a chemically strengthened glass. 
     
     
         15 . A cover glass comprising the glass substrate according to  claim 2  and configured to cover a display panel. 
     
     
         16 . An assembly comprising:
 an uneven structure; and   
       the glass substrate according to  claim 2  that is assembled to the uneven structure,
 wherein the thin portion of the glass substrate is assembled to the uneven structure with the thin portion elastically deformed according to a shape of the uneven structure. 
 
     
     
         17 . A method of manufacturing an assembly, the method comprising
 assembling the glass substrate according to  claim 2  to an uneven structure,   wherein the thin portion of the glass substrate is elastically deformed according to a shape of the uneven structure and assembled to the uneven structure.   
     
     
         18 . An in-vehicle display device comprising:
 an instrument cluster provided in front of a driving seat;   a center information display provided in front of an area between the driving seat and a passenger seat; and   the glass substrate according to  claim 2 ,   wherein the instrument cluster comprises an uneven structure,   wherein the thin portion of the glass substrate is assembled to the uneven structure with the thin portion elastically deformed according to a shape of the uneven structure, and   wherein the thick portion of the glass substrate is assembled to the center information display.   
     
     
         19 . A method of manufacturing an in-vehicle display, the method comprising assembling the glass substrate according to  claim 2  to an instrument cluster provided in front of a driving seat and a center information display provided in front of an area between the driving seat and a passenger seat,
 wherein the instrument cluster comprises uneven structure, 
 wherein the thin portion of the glass substrate is elastically deformed according to a shape of the uneven structure and assembled to the uneven structure, and 
 wherein the thick portion of the glass substrate is assembled to the center information display.