Navigation system with selective intersection display

  • US 5,587,911 A
  • Filed: 12/01/1995
  • Issued: 12/24/1996
  • Est. Priority Date: 07/27/1993
  • Status: Expired due to Term
First Claim
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1. A navigation system for guiding a vehicle to a destination in accordance with a searched route composed of a series of interconnecting roads and intersections, comprising:

  • external memory means for storing at least road data and intersection data including (1) text information including names of roads and identifying data for identifying intersections and (2) coordinate data for the intersections;

    a video display for being viewed by a vehicle operator;

    present position detecting means for detecting the present position of the vehicle;

    input means for inputting the destination;

    route searching means for determining a route from the detected present position to the input destination, by searching the data stored in said external memory means;

    route storing means for retrieving, from said external memory means, text information for the route determined by said route searching means and for storing said retrieved text information as route text information;

    control means for retrieving the route text information from said route storing means and for listing items of said route text information, including at least the road names and plural identified intersections, in geographical sequence;

    first picture means for picturing a route information screen on said video display to display the listed items of said text information;

    intersection selecting means for selecting any one of the plural, identified intersections listed on the route information screen; and

    second picture means for retrieving the coordinate data for the selected intersection from said external memory means and for providing a map display screen on said video display to show a map including the position of selected intersection.

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