Patent ID: 9741184
Date: 2017-08-22
CPC Classifications: G06F,G07C

Claim:
1. A proximity sensor for a door of a structure, comprising: a printed circuit board (PCB) mounted in a structure; a plurality of light emitters mounted on said PCB emitting light out of the structure; a plurality of light detectors mounted on said PCB; a plurality of lenses mounted on said PCB and oriented relative to said emitters and to said detectors such that for each emitter-detector pair, when a reflective object is located at a target position near the structure, corresponding to that emitter-detector pair, then the light emitted by that emitter passes through one of the lenses and is reflected by the object back through one of the lenses to that detector, wherein at least one of said lenses comprises: a processor mounted in the structure and connected to said emitters and to said detectors, (i) synchronously activating emitter-detector pairs, (ii) recognizing from the amounts of light received by the activated detectors, based on the target positions corresponding to the activated emitter-detector pairs, that the object is approaching the structure and is performing a sweep gesture, and (iii) in response to the recognized sweep gesture, activating a keyless lock for locking and unlocking a door of the structure, wherein the keyless lock, when activated, scans for a digital key via wireless communication.