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Programmable shelf tag and method for changing and updating shelf tag information

  • US 5,751,257 A
  • Filed: 04/28/1995
  • Issued: 05/12/1998
  • Est. Priority Date: 04/28/1995
  • Status: Expired due to Term
First Claim
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1. An electronic shelf tag comprising:

  • a liquid crystal display including a liquid crystal having a first and second optical state which are both stable in the absence of an electric field;

    at least one character element formed in said liquid crystal display; and

    a plurality of independent electrical conductor members coupled to said at least one character element for applying an electric field to said at least one character element to change the optical state of said liquid crystal, said electrical conductor members positioned in a predetermined configuration to be accessible exterior to the electronic shelf tag and located on the same side of said liquid crystal display to couple electrical signals to the liquid crystal display.

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