Patent ID: 9726803
Date: 2017-08-08
CPC Classifications: G02B,G06F

Claim:
1. An apparatus comprising: an interactive display, having a first front surface including a viewing area, and providing an input/output (I/O) interface for a user of an electronic device; a processor; a planar light guide disposed substantially parallel to the first front surface and having a periphery at least coextensive with the viewing area, the planar light guide being disposed proximate to and in front of the first front surface, and having a rear surface proximate to the first front surface and a second front surface opposite to the rear surface; a planar light collecting device disposed in front of the first front surface; a light-emitting source disposed outside the periphery of the planar light guide, the light-emitting source being optically coupled with an input of the planar light guide and not optically coupled with the planar light collecting device; and a plurality of light sensors disposed outside the periphery of the planar light guide, the plurality of light sensors being optically coupled with an output of the planar light collecting device and not optically coupled with the planar light guide; wherein,