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Retail store display system

  • US 5,465,085 A
  • Filed: 02/22/1994
  • Issued: 11/07/1995
  • Est. Priority Date: 02/13/1992
  • Status: Expired due to Fees
First Claim
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1. An electronic display unit for electronically displaying item data associated with it, said data being provided in updatable form by a computer, said display unit comprising:

  • a receiver including a detector, and amplifier and a comparator, for receiving and comparing data transmitted by said computer;

    a non-volatile semiconductor memory coupled to said receiver for storing its own address along with the data provided by said computer, for retaining such data even in the absence of external power and for providing said address to said receiver for comparison to the received data;

    a display coupled to said non-volatile memory for displaying said data;

    a controller coupled to said receiver which receives a signal from said receiver when the address stored in said non-volatile memory is contained within a message received from said computer and if so, changes the displayed information to the extent indicated by said message;

    a photovoltaic power supply which supplies adequate power for the entire display unit without need for battery backup; and

    an electronic switch coupled between said power supply, said receiver and said memory for selectively providing power either to said memory, to said receiver, or to neither of them depending upon the amount of power available from said power supply.

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