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Transparent digitiser

  • US 8,217,918 B2
  • Filed: 10/02/2007
  • Issued: 07/10/2012
  • Est. Priority Date: 08/29/2002
  • Status: Active Grant
First Claim
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1. A passive stylus for use with a digitizer, comprising:

  • an outer stylus shaped front housing having a front tip,a corresponding reverse tip, the reverse tip located at a second end of the stylus remote from said front tip,a resonator arrangement electrically connected at one end to both the front tip and the reverse tip and at another end to both the front housing and the rear housing, the resonator arrangement having a resonant frequency, anda first gap formed between the front housing and the front tip across which said resonator arrangement is coupled, to create a first electric field concentration in a vicinity of said front tip,a second gap formed between the rear housing and the reverse tip across which said resonator arrangement is coupled, to create a second electric field concentration in a vicinity of said rear tip.

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