System and method for navigating a vehicle
First Claim
1. A system for navigating a vehicle, comprising:
- (a) first means for monitoring a distance travelled by the vehicle and vehicle direction and deriving data on the instantaneous position and direction of the vehicle;
(b) second means for storing roadmap data including configurations of a plurality of known branching points;
(c) third means for designating a route of travel from a first known branching point through which the vehicle is first to pass to a final destination;
(d) fourth means for determining a first road connected to the first known branching point and through which the vehicle is to arrive at the first known branching point on the basis of the present direction of the vehicle with respect to the first known branching point, derived by said first means, and based on direction data stored in said second means for each road branched from the first known branching point; and
(e) fifth means for displaying on a display screen thereof a relative positional relationship between the first road and a second road branched from the first known branching point and through which the vehicle is to travel along the designated route of travel from the first known branching point.
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Accused Products
Abstract
A navigation system and method for guiding a vehicle along a selected route of travel to a destination from a starting point using a display unit. In the navigation system, a positional relationship between a start road branched from a first known branching point (a start intersection from which a guidance of the vehicle along the selected route of travel is initiated) and entrance direction of the vehicle toward the first known branching point is clearly and distinguishably displayed on the screen of the display unit after the selection of the route of travel from the starting point to the destination so that the vehicle can corectly enter the start road at the first known branching point even if it has reached the first known branching point via any arbitrary route of travel from the starting point.
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Citations
18 Claims
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1. A system for navigating a vehicle, comprising:
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(a) first means for monitoring a distance travelled by the vehicle and vehicle direction and deriving data on the instantaneous position and direction of the vehicle; (b) second means for storing roadmap data including configurations of a plurality of known branching points; (c) third means for designating a route of travel from a first known branching point through which the vehicle is first to pass to a final destination; (d) fourth means for determining a first road connected to the first known branching point and through which the vehicle is to arrive at the first known branching point on the basis of the present direction of the vehicle with respect to the first known branching point, derived by said first means, and based on direction data stored in said second means for each road branched from the first known branching point; and (e) fifth means for displaying on a display screen thereof a relative positional relationship between the first road and a second road branched from the first known branching point and through which the vehicle is to travel along the designated route of travel from the first known branching point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for navigating a vehicle, comprising the steps of:
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(a) monitoring a distance travelled by the vehicle and vehicle direction and deriving the instantaneous position of the vehicle; (b) providing storage means for storing roadmap data including configurations of a plurality of known branching points; (c) designating a route of travel from a first known branching point through which the vehicle is first to pass to a final destination; (d) determining a first road connected to the first known branching point and through which the vehicle is to arrive at the first known branching point on the basis of the present direction of the vehicle with respect to the first known branching point, derived in said step (a), and on the basis of direction data stored in said step (b) for each road branched from the first known branching point; and (e) providing display means for displaying on a display screen thereof a relative positional relationship between the first road and a second road branched from the first known branching point and present in the designated route of travel. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification