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Automobile route information display

  • US 4,642,776 A
  • Filed: 07/03/1984
  • Issued: 02/10/1987
  • Est. Priority Date: 07/12/1983
  • Status: Expired due to Fees
First Claim
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1. A device for displaying information concerning a travel route of an automotive vehicle comprising:

  • direction detection means for generating a direction signal corresponding to a vehicle travel direction;

    distance detection means for generating a distance signal corresponding to a distance travelled by the vehicle;

    control means for;

    (1) continuously monitoring changes in the travel direction of the vehicle on the basis of the direction signal detected by said direction detection means with reference to a reference compass bearing, (2) successively storing;

    (a) direction change indication signals corresponding to an amount of change in the direction of travel of the vehicle with reference to said reference compass bearing when an amount of change in the travel direction of the vehicle exceeds a predetermined amount, and (b) distance signals, each of which corresponds to a distance from a distance reference, at a time of storing one of said direction change indication signals on the route from the starting point to the destination, and (3) generating a travel direction signal indicative of a travel direction substantially at every predetermined distance interval on the route from the destination to the starting point on the basis of said stored direction change indication signals and said stored distance signals,displaying means for displaying the travel direction on the route from the destination to the starting point on the basis of said travel direction signal delivered from said control means; and

    instruction means for supplying said control means with a mode signal for determining a mode of control thereof corresponding to one of the outward travel state and the return travel state.

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