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SHADOW DETECTION IN OPTICAL TOUCH SENSOR THROUGH THE LINEAR COMBINATION OF OPTICAL BEAMS AND GREY-SCALE DETERMINATION OF DETECTED SHADOW EDGES

  • US 20080273019A1
  • Filed: 05/02/2007
  • Published: 11/06/2008
  • Est. Priority Date: 05/02/2007
  • Status: Active Grant
First Claim
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1. An apparatus, comprising;

  • a optical waveguide, the optical waveguide including;

    a waveguide groove formed in the optical waveguide; and

    a plurality of lenses optically coupled to the waveguide groove so that either light received by the plurality of lenses is combined in the waveguide groove or light transmitted by the waveguide groove is split among the plurality of lenses.

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