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POSITION INDICATOR, VARIABLE CAPACITOR, POSITION INPUT DEVICE AND COMPUTER SYSTEM

  • US 20090076770A1
  • Filed: 09/18/2008
  • Published: 03/19/2009
  • Est. Priority Date: 09/18/2007
  • Status: Active Grant
First Claim
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1. A position indicator comprising:

  • a variable capacitor;

    a resonant circuit configured with a position detecting coil and a capacitor connected with the variable capacitor; and

    a rod passing through the position detecting coil,wherein the variable capacitor includes a dielectric having two mutually opposite surfaces, an electrode arranged on one surface of the dielectric and having a predetermined area, a hole penetrating the two mutually opposite surfaces of the dielectric, a conductive portion electrically connecting both ends of the hole to one another, and a conductive elastic member arranged near the other surface of the dielectric, andwherein one end of the rod is connected to the conductive elastic member, and the other end of the rod serves as a position-indicating point.

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