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Smart card

  • US 6,050,494 A
  • Filed: 06/04/1998
  • Issued: 04/18/2000
  • Est. Priority Date: 06/09/1997
  • Status: Expired due to Term
First Claim
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1. A smart card including:

  • a transparent circuit board on which an integrated circuit, function switches, a power source, and other parts are mounted;

    an upper substrate mounted facing the circuit board;

    upper and lower electrodes respectively located on facing surfaces of the upper substrate and the circuit board and orthogonal to each other;

    orientation films coating the upper and lower electrodes; and

    a liquid crystal material located in the space and sealed between the upper and lower electrodes.

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  • 3 Assignments
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