×

Onboard road map display systems

  • US 5,257,023 A
  • Filed: 03/19/1992
  • Issued: 10/26/1993
  • Est. Priority Date: 03/28/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. An onboard road map display system mounted on a vehicle, said display system comprising:

  • a communicating means for performing road-vehicle communication to receive traffic information on traffic congestion on monitored roads in which traffic conditions are monitored a map storing means for storing map data representing a map of roads;

    a map displaying means for displaying a road map around a current vehicle position of the vehicle and congested road sections;

    a display mode selecting means for selecting one of a first display mode in which said monitored roads around said current vehicle position of the vehicle are displayed in a map together with unmonitored roads in which traffic conditions are not monitored, and a second display mode in which a map of only said monitored roads around the current vehicle position is displayed; and

    a processing means for causing said map displaying means to display a road map image according to a selected one of said first and second display modes;

    wherein said processing means comprises a discriminating means for discriminating between said monitored roads and said unmonitored roads by using one of said traffic information received by said communicating means and said map data stored in said map storing means.

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