Light sensor attachment structure of image display device

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;
• and
• a second cushion disposed outside the tubular cushion serving as a first cushion and configured to support the substrate;
• wherein a panel metal sheet is disposed behind the reflection sheet;
• wherein a front surface of the tubular cushion and the reflection sheet are bonded together;
• wherein a back surface of the tubular cushion and the substrate are bonded together;
• wherein the structure further comprises one or both of configurations (1) and (2):
• (1) a front surface of the second cushion and the panel metal sheet are bonded together;
• (2) a back surface of the second cushion and the substrate are bonded together.