Navigation system with route determination process capable of determining a desired route readily and correctly
First Claim
1. A navigation system for a vehicle comprising:
- display means for displaying a road map thereon;
map data storage means for storing map data therein and for supplying a road map to be displayed by said display means;
display control means for controlling said display means to display a desired road map from the map data stored in said map data storage means with intersections on the displayed road map being displayed without an intersection number;
intersection numbering means for assigning, during operation of said navigation system, an intersection number to each intersection of the road map currently displayed by said display means;
number indication control means for controlling said display means to indicate the assigned intersection number adjacent each respective intersection of the road map currently displayed by said display means;
intersection number input means for inputting a desired intersection number from the intersection numbers displayed by said display means; and
route determination means for storing each road located between the assigned intersection number of a currently inputted intersection and the assigned intersection number of a previously inputted intersection as a route to be taken and for indicating each such road as the determined route on the road map displayed by said display means.
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Accused Products
Abstract
A navigation system includes a display, a map data storage device, a display control device, an intersection numbering device, a number indication control device, an intersection number input device, and a route determination device. The intersection numbering device prepares intersection numbers with respect to each intersection included in map data stored in the map data storage device. The number indication control device identifies each intersection on a road map displayed on a screen by indicating each displayed intersection with a respective intersection number. A user can specifically designate desired route intersections by inputting the corresponding intersection numbers indicated on the screen. Thus, a desired route can be readily and correctly determined. Since the map data does not originally contain the intersection numbers, the map data is small in volume, and a wide variety of map data, such as those with a different display color or layout, can be used for the navigation system.
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Citations
13 Claims
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1. A navigation system for a vehicle comprising:
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display means for displaying a road map thereon; map data storage means for storing map data therein and for supplying a road map to be displayed by said display means; display control means for controlling said display means to display a desired road map from the map data stored in said map data storage means with intersections on the displayed road map being displayed without an intersection number; intersection numbering means for assigning, during operation of said navigation system, an intersection number to each intersection of the road map currently displayed by said display means; number indication control means for controlling said display means to indicate the assigned intersection number adjacent each respective intersection of the road map currently displayed by said display means; intersection number input means for inputting a desired intersection number from the intersection numbers displayed by said display means; and route determination means for storing each road located between the assigned intersection number of a currently inputted intersection and the assigned intersection number of a previously inputted intersection as a route to be taken and for indicating each such road as the determined route on the road map displayed by said display means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of navigating a vehicle comprising the steps of:
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displaying, with a display means, a road map; storing map data in a map data storage means and supplying to said display means a desired road map to be displayed; controlling, with a display control means, said display means to display a desired road map from the map data stored in said map data storage means with intersections on the displayed road map being displayed without an intersection number; assigning an intersection number, during operation of an intersection numbering means, to each intersection of the road map currently displayed by said display means upon the intersections being displayed on said road map; controlling said display means, with a number indication control means, to indicate the assigned intersection number adjacent each respective intersection of the road map currently displayed by said display means; inputting, with an intersection number input means, a desired intersection number from the intersection numbers displayed by said display means; storing, with a route determination means, each road located between the assigned intersection number of a currently inputted intersection and the assigned intersection number of a previously inputted intersection as a route to be taken; and indicating on the road map displayed by said display means each such road as the determined route to be taken.
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Specification