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Apparatus for non-contact 3D hand gesture recognition with code-based light sensing

  • US 8,830,171 B2
  • Filed: 05/22/2012
  • Issued: 09/09/2014
  • Est. Priority Date: 05/22/2012
  • Status: Expired due to Fees
First Claim
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1. 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.

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