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Card reader display system

  • US 6,486,862 B1
  • Filed: 05/09/1997
  • Issued: 11/26/2002
  • Est. Priority Date: 10/31/1996
  • Status: Expired due to Term
First Claim
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1. A card reader system comprising:

  • a card reader that reads information from a card;

    a card slot that receives the card relative to the card reader;

    a control circuit connected to the card reader for controlling the card reader and for processing the information;

    a control panel for controlling the control circuit;

    a display system for displaying the information, the display system having a display circuit that is connected to the control circuit and generates display data, an active matrix liquid crystal display that presents the display data as an image, and a light emitting diode (LED) backlight that illuminates the image;

    a battery for powering the display system, the control circuit, and the control panel;

    an optical system along an optical path with the display to magnify the image for viewing by a user; and

    a power management circuit that controls the power consumption of the display circuit such that after the image is illuminated, the power management circuit lowers the power consumption of the display circuit until the next image is ready to be presented on the matrix liquid crystal display.

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