Car navigation system
First Claim
Patent Images
1. A car navigation system comprising:
- a road map data base;
a car position detecting device for detecting a current position of a car on a road map of said road map data base;
a destination input means for setting a destination on said road map of said road map data base;
place-name input means for inputting an input place name;
route judgment means for judging whether a direction of the input place name is the same as a direction of said destination; and
route judgment result output means for outputting a judgment result.
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Abstract
A car navigation system including route judgment means for judging whether an input place name is suitable for a route extending to a destination, and judgment result output means for outputting a judgment result, so that a car can be guided and navigated along a suitable route extending to the destination by inputting a place name written on a road sign or the like. The judgment result is output with a voice message or image display. When plural place names are input, the judgment is made on each of the place names, and the most suitable place name is selected and output.
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Citations
14 Claims
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1. A car navigation system comprising:
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a road map data base; a car position detecting device for detecting a current position of a car on a road map of said road map data base; a destination input means for setting a destination on said road map of said road map data base; place-name input means for inputting an input place name; route judgment means for judging whether a direction of the input place name is the same as a direction of said destination; and route judgment result output means for outputting a judgment result. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A navigation method for a vehicle navigation system, comprising the steps of:
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storing road map information including place names and positions in a road map of a road map data base of the system; inputting into the system a desired destination on said road map; calculating a travel route to said desired destination; directing the vehicle along the calculated travel route; while the vehicle is on route to said desired destination, inputting a place name other than said desired destination into the system; judging whether a direction of said place name is the same as a direction of said desired destination; and outputting a judgment result. - View Dependent Claims (14)
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Specification