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Coordinate reader

  • US 6,606,087 B1
  • Filed: 09/11/2000
  • Issued: 08/12/2003
  • Est. Priority Date: 09/13/1999
  • Status: Expired due to Term
First Claim
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1. A coordinate reader for detecting coordinates designated by an alternating magnetic field, comprising:

  • a base member comprising;

    a first side including a first loop wire that generates a first signal in response to the alternating magnetic field, and a first input plane;

    a second side including a second loop wire that generates a second signal in response to the alternating magnetic field, and a second input plane;

    a signal detection unit that detects the first and the second signals;

    an input plane determination unit that determines from which of the first input plane or the second input plane the coordinates are designated by the alternating magnetic field by using at least one of the first and the second signals; and

    a coordinate determination unit that determines a first coordinate and a second coordinate that are designated by the alternating magnetic field based on the detected first and second signals, respectively.

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