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Map display apparatus

  • US 5,473,324 A
  • Filed: 12/09/1993
  • Issued: 12/05/1995
  • Est. Priority Date: 12/28/1992
  • Status: Expired due to Term
First Claim
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1. A map display apparatus comprising:

  • a map information memory which stores map information including information relating to main roads;

    an information read-out means which reads out the map information stored in said map information memory;

    a display means which displays the map information read out by said map information read-out means from said map information memory;

    a route map preparing means which prepares, on the displayed map, a route map made up of line segments which connect a starting point, successive passing points and a point of destination along a desired travel path;

    a main road identifying means which reads out said information relating to main roads from said map information memory;

    means for detecting a present position of the map display apparatus; and

    a control means which carries out control operations on the display means when said display means is displaying said map information read out by said information read-out means and said present position detected by said means for detecting said present position, said control operations including providing a subview on said display means, said subview displaying a map including said route map, said present position and said information relating to main reads read out of said map information memory by said main road identifying means, said information relating to main roads being displayed over said route map in correspondence with said route map.

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