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Subglobal area addressing for electronic price displays

  • US 5,704,049 A
  • Filed: 05/23/1994
  • Issued: 12/30/1997
  • Est. Priority Date: 12/22/1992
  • Status: Expired due to Fees
First Claim
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1. A method of addressing more than one and less than all of the display devices in an electronic display system, said system comprising a host and a multiplicity of electronic price display devices communicatively coupled with the host, each display device having a respective unique address and responsive to messages from the host containing said unique address, said method comprising the steps of:

  • selecting a first particular subglobal address value;

    storing to substantially all of the display devices respective subglobal address values such that the particular subglobal address value is stored to more than one and less than all of the display devices;

    broadcasting to the display devices a command comprising;

    an indication that the command is to be addressed with respect to each display device'"'"'s respective subglobal address; and

    a second particular subglobal address value;

    within each display device, comparing the second particular subglobal address value with the display device'"'"'s respective stored subglobal address value, and performing a predetermined action if the second particular subglobal address value bears a predetermined relation to the display device'"'"'s respective stored subglobal address value.

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