Patent ID: 11960678
Assignee: ALPINE ELECTRONICS, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 0:
1. A proximity detection device, which detects a user's approach to a display surface of a display, comprising:
a plurality of infrared light sources that are arrayed along a first side, which is one side of the display surface, outside the display surface of the display and emit infrared light passing a front of the display surface;
one or a plurality of light detectors that are arranged outside the display surface;
a proximity detection unit that detects the user's approach to the display surface with a set sensitivity using an intensity of reflected light of the infrared light emitted by each of the infrared light sources detected by the light detector; and
a sensitivity setting unit that estimates a first-direction position, which is a position where reflection occurs in a first direction which is a direction along the first side, according to the intensity of the reflected light of the infrared light emitted by each of the infrared light sources detected by the light detector and sets the sensitivity of the proximity detection unit to a sensitivity determined according to the estimated first-direction position and a preset relationship between the first-direction position and the sensitivity.