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Technique for communicating with electronic labels in an electronic price display system

  • US 5,977,998 A
  • Filed: 02/03/1997
  • Issued: 11/02/1999
  • Est. Priority Date: 12/22/1992
  • Status: Expired due to Fees
First Claim
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1. Apparatus for displaying information having a predetermined address and comprising:

  • a screen;

    at least one memory comprising a plurality of memory elements, each memory element storing display data;

    means for reading the memory elements;

    means for displaying on said screen information based on the display data stored in the memory elements read by the reading means;

    means for receiving messages each including an address field and a data field; and

    means for accepting the received messages whose address fields match said predetermined address, the data field of an accepted message comprising a sequence of data words each including at least a first subword, the first subword of each data word in the sequence identifying a memory element, a subset of the memory elements identified by first subwords of the data words being read by the reading means for display in an order identical to that of the corresponding first subwords in the sequence.

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