Patent ID: 8830171

Claim:
A non-contact 3D hand gesture recognition apparatus, comprising: a plurality of light emitters, each able to emit a light comprising a unique identification code, said plurality of light emitters able to emit light simultaneously or taking turns to emit light; a controller, connected to said plurality of light emitters for controlling timing, duration and power level of light emitted by said plurality of light emitters; and at least a light sensor, for receiving light emitted from said plurality of light emitters and reflected by an object, performing a correlation computation on said identification code to identify said unique identification code in each said reflected light and computing a power level of each said received reflected light to determine a position and distance of said object; wherein said light sensor comprises; an analog-to-digital converter (ADC), for converting received reflected light into a digital sequence and extracting said unique identification code from said digital sequence; and at least a correlation module, each said correlation module receiving said unique identification code in said digital sequence and computing correlation with a unique identification code of a said light emitter to determine a power level.