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Data carrier with disc shaped carrier structure

  • US 5,478,995 A
  • Filed: 09/08/1994
  • Issued: 12/26/1995
  • Est. Priority Date: 10/23/1986
  • Status: Expired due to Fees
First Claim
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1. A data carrier for a non-contact data communication with a control station, the control station being provided with a coin handling device, which comprises an encoder/decoder and a slot, and controlling a passage to an area or space by checking and/or changing data of authorization of passage on the data carrier by said encoder/decoder when the data carrier is inserted into said slot of the coin handling device, the data carrier comprising:

  • a carrier base structure having the form of a disk adapted to be handled in the manner of a coin by said coin handling device;

    a non-volatile, electrically erasable and programmable memory designed to store the data of authorization of passage;

    a data sending-receiving unit for receiving data from the control station and transmitting data to the control station;

    a liquid crystal display for displaying data;

    a central processing unit for making visible on the liquid crystal display the data stored in the memory; and

    a solar cell unit for providing power to the liquid crystal display and to the means for making visible the data on the liquid crystal display.

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