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Navigation apparatus for vehicles

  • US 5,274,387 A
  • Filed: 07/30/1992
  • Issued: 12/28/1993
  • Est. Priority Date: 06/06/1990
  • Status: Expired due to Fees
First Claim
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1. A navigation apparatus for vehicles, having a display device of fixed display size for displaying map information, comprising:

  • route setting means for setting a route which a driver will take to get to a destination on the basis of the map information, the set route including a plurality of route segments;

    estimation means for estimating a current vehicle position on the set route;

    timing setting means for setting a timing at which a background display image on the display device is replaced;

    display area setting means for setting a plurality of display areas, each having the current vehicle position displayed therein, at a timing set by the timing setting means;

    calculation means for calculating, in response to said display area setting means, the length of the route segments of the set route displayed within each of said display areas;

    display area selecting means for selecting one of said display areas from the plurality of display areas such that the selected display area shows the route having the longest calculated length and the route is displayed substantially at the maximum length within the selected display device; and

    display control means responsive to the display areas selecting means for displaying the route and the map information within the selected display area as the background display image, and for displaying and moving a marker symbol of the vehicle in an overlapped manner within the selected display area as the vehicle drives on the route.

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