Navigation system for use in vehicle
First Claim
Patent Images
1. A navigation system for use in a vehicle, comprising:
- map information storage means for storing a map information, said map information including at least a road network;
optimum route computation means for computing an optimum route from a starting point to a destination in accordance with said map information;
current position detection means for detecting a current position of the vehicle;
computation means for computing an intersection where the vehicle should turn and a direction of travel of the vehicle from said intersection in accordance with said current position of the vehicle and said optimum route;
intersecting road detection means for detecting, from said map information, at least one nearest intersecting road which intersects a road on which the vehicle is currently travelling along said optimum route between said current position of the vehicle and said intersection at which the vehicle is to turn;
anddisplay means comprising a monitor said display means displaying first or second direction indicating images on said monitor while the vehicle is travelling along said optimum route, said first direction indicating image including a straight vertical portion representing the road on which the vehicle is currently travelling and an arrow portion extending from an upper end of said straight vertical portion indicating said direction of travel of the vehicle at the intersection at which the vehicle is to turn, said second direction indicating image including said straight vertical portion, said arrow portion, and a first horizontal portion which intersects said straight vertical portion indicating a nearest intersecting road, which is closest to said intersection at which the vehicle is to turn; and
said display means displaying said second direction indicating image before the vehicle passes said nearest intersecting road and displaying said first direction indicating image after the vehicle passes said nearest intersecting road.
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Abstract
A vehicle navigation system in which an optimum route from a starting point to a destination is computed in accordance with map information. A route guide is displayed in accordance with the current position of the vehicle and the optimum route. The route guiding information includes an image indicating the direction of vehicle progress from an intersection where the vehicle should turn, the name of the road the vehicle is to enter, and the name of a road intersecting the road on which the vehicle is currently running between the current position of the vehicle and the intersection where the vehicle should turn.
71 Citations
8 Claims
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1. A navigation system for use in a vehicle, comprising:
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map information storage means for storing a map information, said map information including at least a road network; optimum route computation means for computing an optimum route from a starting point to a destination in accordance with said map information; current position detection means for detecting a current position of the vehicle; computation means for computing an intersection where the vehicle should turn and a direction of travel of the vehicle from said intersection in accordance with said current position of the vehicle and said optimum route; intersecting road detection means for detecting, from said map information, at least one nearest intersecting road which intersects a road on which the vehicle is currently travelling along said optimum route between said current position of the vehicle and said intersection at which the vehicle is to turn;
anddisplay means comprising a monitor said display means displaying first or second direction indicating images on said monitor while the vehicle is travelling along said optimum route, said first direction indicating image including a straight vertical portion representing the road on which the vehicle is currently travelling and an arrow portion extending from an upper end of said straight vertical portion indicating said direction of travel of the vehicle at the intersection at which the vehicle is to turn, said second direction indicating image including said straight vertical portion, said arrow portion, and a first horizontal portion which intersects said straight vertical portion indicating a nearest intersecting road, which is closest to said intersection at which the vehicle is to turn; and said display means displaying said second direction indicating image before the vehicle passes said nearest intersecting road and displaying said first direction indicating image after the vehicle passes said nearest intersecting road. - View Dependent Claims (2, 3, 4)
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5. A navigation system for use in a vehicle, comprising:
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map information storage means for storing a map information, said map information including at least a road network and names of roads; optimum route computation means for computing an optimum route from a starting point to a destination in accordance with said map information; current position detection means for detecting a current position of the vehicle; computation means for computing an intersection where the vehicle should turn, a direction of travel of the vehicle from said intersection, and a name of a road that the vehicle will enter when it turns, in accordance with said current position of the vehicle and said optimum route; intersecting road detection means for detecting, from said map information, names of roads intersecting a road on which the vehicle is currently travelling between said current position of the vehicle and said intersection at which the vehicle is to turn; and display means comprising a monitor, said display means displaying a direction indicating image on a first area of said monitor when the vehicle travels along said optimum route, said direction indicating image including a straight vertical portion representing the road on which the vehicle is currently travelling and an arrow portion extending from an upper end of said straight vertical portion indicating said direction of travel of the vehicle at the intersection at which the vehicle is to turn, said display means displaying said name of the road for the vehicle to enter in the proximity of said arrow portion, said display means displaying said names of intersecting roads in a second area of said monitor when the vehicle travels along said optimum route. - View Dependent Claims (6, 7, 8)
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Specification