Patent ID: 9164625
Filing Date: 2015-10-20
Classification: A63F,G01J,G01S,G06F

Abstract:
1. A proximity sensor for determining two-dimensional coordinates of a proximal object, comprising: a housing; a plurality of light pulse emitters mounted in said housing for projecting light out of said housing along a detection plane; a plurality of primary light detectors mounted in said housing for detecting reflections of the light projected by said emitters, by a reflective object in the detection plane; a plurality of primary lenses mounted and oriented in said housing relative to said emitters and said primary detectors in such a manner that for each emitter-detector pair, light emitted by the emitter of that pair passes through one of the primary lenses and is reflected by the object back through one of the primary lenses to the detector of that pair when the object is located at a two-dimensional position, from among a primary set of positions in the detection plane, that position being associated with that emitter-detector pair; and a processor connected to said emitters and to said primary detectors, for synchronously co-activating emitter-detector pairs, and configured to calculate a two-dimensional location of the object in the detection plane by: