OPTICAL POSITION DETECTION DEVICE, HAND DEVICE, AND DISPLAY DEVICE WITH POSITION DETECTION FUNCTION

摘要

A position detection device includes: a light source adapted to form a light intensity distribution of a detection light beam; a first detector adapted to receive a reflected light beam of the detection light beam reflected by an object in a detection area where the light intensity distribution is formed; a transmissive member disposed between the detection area and the light source, and between the detection area and the first detector, and having a first surface directed toward the detection area and a second surface directed toward the light source; a second detector adapted to receive a light beam reflected by the second surface out of the detection light beam; a position detector adapted to detect the object based on the detection result in the first detector; and a light blocking member disposed between the second detector and the detection area, and adapted to block the reflected light beam.