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Modulated laser data transfer

  • US 5,975,416 A
  • Filed: 02/10/1997
  • Issued: 11/02/1999
  • Est. Priority Date: 06/29/1995
  • Status: Expired due to Term
First Claim
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1. A system for displaying information about products identifiable by indicia having parts of different light reflectivity, the system comprising:

  • a) an information module mounted in association with a selected product;

    b) an optical detector supported by the module, for detecting an information-carrying optical signal;

    c) a portable, hand-held unit operative, in a scanning mode, for electro-optically reading by wireless transmission an indicium associated with the selected product to identify the product and operative, in a data transfer mode, for transmitting by wireless transmission the information-carrying optical signal to the optical detector;

    d) a storage device supported by the unit, for storing and delivering product information about the identified product after product identification;

    e) a modulator operatively connected to the storage device, for placing the product information delivered by the storage device in the information-carrying optical signal; and

    f) a display supported by the module, for displaying the product information contained in the information-carrying optical signal transmitted by the unit to the optical detector.

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