Route guide apparatus
First Claim
1. A route guide apparatus for a vehicle, for supplying guidance relating to a guide point on a guide route, while detecting a vehicle position and referring to road network information, the route guide apparatus comprising:
- a guidance output point detecting unit for detecting whether or not the vehicle position has reached a guidance output point set before the guide point on the guide route;
a traffic light counting unit for counting a number of traffic lights existing along the guide route from the vehicle position to the guide point based on the road network information and information as to a presence or absence of traffic lights at respective locations on the guide route; and
a guidance output unit for supplying the guidance related to the guide point using the number of traffic lights counted by said traffic light counting unit when said guidance output point detecting unit detects that the vehicle position has reached the guidance output point.
1 Assignment
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Accused Products
Abstract
A route guide apparatus is disclosed, in order to supply guidance at a guide point along a guide route before reaching the guide point in an easy-to-understand fashion. Guide routes are displayed along roads in map data displays and the number of traffic lights existing between a vehicle position and the guide point where the direction is to be changed is displayed or indicated by voice. Such phases as "Turn at fourth traffic light" or "Turn after passing third traffic light" are displayed on the map displays or indicated by voice. A traffic light icon, if displayed, can facilitate the determination of the presence or absence of a traffic light at the intersections and the guide point.
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Citations
20 Claims
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1. A route guide apparatus for a vehicle, for supplying guidance relating to a guide point on a guide route, while detecting a vehicle position and referring to road network information, the route guide apparatus comprising:
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a guidance output point detecting unit for detecting whether or not the vehicle position has reached a guidance output point set before the guide point on the guide route; a traffic light counting unit for counting a number of traffic lights existing along the guide route from the vehicle position to the guide point based on the road network information and information as to a presence or absence of traffic lights at respective locations on the guide route; and a guidance output unit for supplying the guidance related to the guide point using the number of traffic lights counted by said traffic light counting unit when said guidance output point detecting unit detects that the vehicle position has reached the guidance output point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A route guide apparatus for a vehicle, for supplying guidance relating to a guide point on a guide route, while detecting a vehicle position and referring to road network information, the route guide apparatus comprising:
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a traffic light counting unit for counting a number of traffic lights existing along the guide route from the vehicle position to the guide point based on the road network information and information as to a presence or absence of traffic lights at specific locations on the guide route; a guidance output point detecting unit for detecting whether or not the vehicle position has reached a guidance output point set before the guide point by a predetermined number of traffic lights, based on the number of traffic lights counted by said traffic light counting unit; and a guidance output unit for supplying the guidance relating to the guide point using the number of traffic lights when said guidance output point detecting unit detects that the vehicle position has reached the guidance output point. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification