Light sensor attachment structure of image display device

Abstract

Provided is an optical sensor mounting structure which is used in an image display device and in which the gap between a reflection sheet and a tubular cushion for preventing the entry of external light into an optical sensor is eliminated so that the amount of light from a backlight can be measured accurately. A liquid crystal image display device 1 includes an optical sensor 12 that measures light from the back surface of a reflection sheet 104 , a substrate 11 having the optical sensor 12 thereon, and a tubular cushion 13 for preventing the entry of external light into the optical sensor 12 . The front surface of the tubular cushion 13 is bonded to the reflection sheet 104 , and the back surface thereof is bonded to the substrate 11.

1 - 10 . (canceled) 
     
     
         11 . An optical sensor mounting structure for use in image display devices comprising:
 an optical sensor configured to measure light from a back surface of a reflection sheet in an image display device;   a substrate having the optical sensor thereon;   a tubular cushion for preventing entry of external light into the optical sensor   wherein a front surface of the tubular cushion and the reflection sheet are bonded together, and   a back surface of the tubular cushion and the substrate are bonded together.   
     
     
         12 . The optical sensor mounting structure of  claim 11 , wherein a panel metal sheet is disposed behind the reflection sheet, further comprising
 a second cushion disposed outside the tubular cushion serving as a first cushion and configured to support the substrate,   wherein a front surface of the second cushion and the panel metal sheet are bonded together; and   a back surface of the second cushion and the substrate are bonded together.   
     
     
         13 . The optical sensor mounting structure of  claim 11 , wherein a panel metal sheet is disposed behind the reflection sheet, and
 a base sheet metal is disposed behind the panel metal sheet, the structure further comprising a second cushion disposed outside the tubular cushion serving as a first cushion and configured to support the substrate,   wherein a front surface of the second cushion and the substrate are bonded together, and   a back surface of the second cushion and the base metal sheet are bonded together.   
     
     
         14 . The optical sensor mounting structure of  claim 12 , wherein rubber hardness of the second cushion is lower than rubber hardness of the first cushion. 
     
     
         15 . The optical sensor mounting structure of  claim 12 , wherein
 a lighting hole is formed in the panel metal sheet, and   the first cushion is contactlessly disposed in the panel metal sheet.   
     
     
         16 . An optical sensor mounting structure for use in image display devices comprising:
 an optical sensor configured to measure light from a back surface of a reflection sheet in an image display device;   a substrate having the optical sensor thereon;   a tubular cushion for preventing entry of external light into the optical sensor,   wherein a base metal sheet having a light-receiving hole through which the optical sensor receives light is disposed over a back surface of the reflection sheet,   the substrate is mounted on the base metal sheet,   the tubular cushion includes first and second tubular members,   a front surface of the first tubular member and the reflection sheet are bonded together, and   a back surface of the second tubular member and the base metal sheet are bonded together.   
     
     
         17 . The optical sensor mounting structure of  claim 16 , wherein a panel metal sheet is disposed behind the reflection sheet,
 the base metal sheet is disposed behind the panel metal sheet,   a lighting hole is formed in the panel metal sheet, and   the first tubular member is contactlessly disposed in the panel metal sheet.   
     
     
         18 . The optical sensor mounting structure of  claim 17 , further comprising a sheet-shaped connecting member bonding together the first tubular member, the second tubular member and the panel metal sheet. 
     
     
         19 . An optical sensor mounting structure for use in image display devices comprising:
 an optical sensor configured to measure light from a back surface of a reflection sheet in an image display device;   a substrate having the optical sensor thereon;   a tubular cushion for preventing entry of external light into the optical sensor, wherein   a base metal sheet having a light-receiving hole through which the optical sensor receives light is disposed over a back surface of the reflection sheet,   the substrate is mounted on the base metal sheet,   a front surface of the tubular cushion and the reflection sheet are bonded together, and   a back surface of the tubular cushion and the base metal sheet are bonded together.   
     
     
         20 . An image display device comprising the optical sensor mounting structure of  claim 19 , wherein light from a back surface of a reflection sheet disposed behind a backlight is measured to control luminance of the backlight.