×

Road map display system with indication of a vehicle position

  • US 4,608,656 A
  • Filed: 04/02/1982
  • Issued: 08/26/1986
  • Est. Priority Date: 04/13/1981
  • Status: Expired due to Term
First Claim
Patent Images

1. A road map display system for an automotive vehicle comprising:

  • a first memory storing road map data, said road map data defined on a first coordinate system;

    a sensor detecting displacement of the vehicle from a starting point and producing a first signal representative of vehicle orientation and position with respect to said first coordinate system;

    a scale selector responsive to said first signal for monitoring vehicle position and adjusting the scale of the map when the vehicle is within a predetermined distance of a preselected point on the map, said selector producing a second signal representative of the selected scale;

    means for transforming said map data in said first memory in response to said first and second signals for producing map data defined on a second coordinate system and for centering said transformed map data about said vehicle position;

    a second memory for storing said transformed map data; and

    a display unit for displaying at least part of the contents of said second memory and having on said second coordinate system a mark representing the position of the vehicle.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×