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Method and apparatus for touch-activated identification and information transfer

  • US 6,642,837 B1
  • Filed: 10/19/1999
  • Issued: 11/04/2003
  • Est. Priority Date: 10/19/1999
  • Status: Expired due to Term
First Claim
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1. A method of wirelessly imparting information, the method comprising:

  • a. providing a tag unit comprising an electrical load and a pair of electrodes spaced apart by a dielectric medium, the load bridging the electrodes;

    b. capacitively coupling a signal source to the electrodes without creating a detectable potential difference therebetween;

    c. selectively coupling one of the electrodes to ground, thereby creating a detectable potential difference across the electrodes and drawing current from the signal source through the load; and

    d. sensing the load and deriving information therefrom.

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