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Non-contact IC card reader/writer device, non-contact IC card, input device, and method of calculating location of non-contact IC card

  • US 7,232,068 B2
  • Filed: 07/24/2003
  • Issued: 06/19/2007
  • Est. Priority Date: 10/11/2002
  • Status: Expired due to Fees
First Claim
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1. A non-contact IC card reader/writer device, comprising:

  • antennas that perform transmission and reception of carrier waves between the non-contact IC card reader/writer device and a non-contact IC card; and

    a control unit to process signals obtained from the antennas and to calculate a location of the non-contact card;

    wherein;

    the antennas are arranged in a matrix on one plane; and

    the control unit alternately drives the antennas, obtains location information from the non-contact IC card and, based thereon, calculates the two dimensional location of the non-contact IC card on said one plane, and detects a difference between successive locations of the non-contact IC card to provide a pointing function based on movement of the non-contact IC card.

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