Display device with hollowed part in backlight

A display device comprising:

• a display panel including a first substrate, a second substrate, and a liquid crystal layer sandwiched between the first substrate and the second substrate;
• a first polarizer and a second polarizer between which the display panel is sandwiched;
• and
• a backlight unit provided at a back surface of the display panel, wherein
• the backlight unit has a hollowed part,
• the display panel has a portion which overlaps the hollowed part in plan view and at which the first polarizer and the second polarizer have openings, the portion serving as a transparent section,
• the display panel at the transparent section emits no display light,
• in plan view, the transparent section is larger than a pixel and is provided on an inner side of an edge of a display area or is provided so as to cut out the display area, and
• the display panel has a back surface on which a functional device configured to perform at least one of light reception or light emission is disposed to overlap the transparent section.