Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
238 words
A navigation system for a vehicle comprising: destination setting means for setting a destination; memory means for storing map information and guide information; current position detecting means for detecting a position of a vehicle and traveling direction thereof; route search means for searching for a route from a current position to a destination on the basis of information stored in said memory means; route-off detecting means for determining whether a vehicle has is off a route on the basis the result of said current position detecting means and information of said memory means; re-search means for re-searching for a route on the basis of information of said memory means when said route-off detecting means determines that a vehicle is off the road; guide means for making a guide on the basis of a route found by said re-search means; said re-search means including: first route search means for searching for a route to a previous route with preference on the traveling direction of a vehicle obtained by said current position detecting means, second route search means for searching for a route to a previous route with no preference on the traveling direction of a vehicle obtained by said current position detecting means, and comparative determining means for comparing a first route and a second route found by said first route search means and said second route search means, respectively, and selecting one of the first and second routes.
Claim 2
Dependent Claim
31 words
The navigation system of Claim 1, wherein: said comparative determining means includes means for determining whether the distance from the current position to the destination is at most a predetermined value.
Claim 3
Dependent Claim
34 words
The navigation system of Claim 2, wherein: said comparative determining means includes means for determining whether the distance of the second route minus that of the first route is at least the predetermined value.
Claim 4
Dependent Claim
39 words
The navigation system of Claim 1, 2, or 3, wherein: said comparative determining means compares the lengths of the first and second routes, the times required for traveling along the routes, and the ease of traveling along the routes.
Claim 5
Independent Claim
23 words
The system of any of Claims 1 to 4, comprising: means for displaying the current position of the vehicle and the selected route.
Claim 6
Dependent Claim
180 words
A navigation system for a vehicle comprising: destination setting means for setting a destination; memory means for storing map information and guide information; current position detecting means for detecting a position of a vehicle and traveling direction thereof; route search means for searching for a route from a current position to a destination on the basis of information stored in said memory means; and guide means for making a guide on the basis of a route found by said route search means; said route search means including: first route search means for searching for a route to a destination with preference on the traveling direction of the vehicle obtained by said current position detecting means, second route search means for searching for a route to the destination with no preference on the traveling direction of the vehicle obtained by said current position detecting means, and comparative determining means for comparing a first route and a second route found by said first route search means and said second route search means respectively and selecting one of the first and second routes.
Claim 7
Dependent Claim
31 words
The navigation system of Claim 6, wherein: said comparative determining means includes means for determining whether the distance from the current position to the destination is at most a predetermined value.
Claim 8
Dependent Claim
31 words
The navigation system of Claim 7, wherein: said comparative determining means includes means for determining whether the first route is longer than the second route by at least the predetermined value.
Claim 9
Dependent Claim
39 words
The navigation system of Claim 6, 7, or 8, wherein: said comparative determining means compares the lengths of the first and second routes, the times required for traveling along the routes, and the ease of traveling along the routes.
Claim 10
Independent Claim
23 words
The system of any of Claims 6 to 9, comprising: means for displaying the current position of the vehicle and the selected route.