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US5754430A
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US
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Car navigation system
Assignee: Honda Motor Co Ltd
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Filing: 1995-03-17
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Granted: 1998-05-19
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Expires: 2015-03-17
Abstract
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.
Inventors
- 👤 Yasuhiro Sawada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:37
CPC Classifications
G; G01; G01C; G01C21/00; G01C21/26; G01C21/34; G01C21/36; G01C21/3605; G01C21/3664; G01C21/3667; G01C21/367; G01C21/3673; G09; G09B; G09B29/00; G09B29/10; G09B29/106
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
93 words
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.
Claim 2
Dependent Claim
93 words
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.
Claim 3
Dependent Claim
46 words
The car navigation system as claimed in claim 1, wherein said road map data base includes place-name display data for place names to be displayed on a map which is reproduced on a screen of an image display device, and pronunciation data for said place names.
Claim 4
Dependent Claim
51 words
The car navigation system as claimed in claim 2, wherein said road map includes place-name display data of said place names to be displayed on said map, data on correct pronunciations for said place names in written form, and data on other pronunciations for said written form of said place names.
Claim 5
Dependent Claim
26 words
The car navigation system as claimed in claim 1, wherein said destination input means and said place-name input means are constructed by a voice recognition device.
Claim 6
Dependent Claim
33 words
The car navigation system as claimed in claim 1, wherein said destination input means and said place-name input means are constructed by a handwritten character input device and a handwritten character recognition device.
Claim 7
Dependent Claim
70 words
The car navigation system as claimed in claim 1, wherein said route judgment means judges on the basis of an intersection angle between a line connecting the current position of the car and the destination and a line connecting the current position of the car and the position of the input place name whether the direction of the input place name is the same as the direction of the destination.
Claim 8
Dependent Claim
79 words
The car navigation system as claimed in claim 1, wherein said route judgment means compares a route extending from the current position of the car to the destination with a route extending from the current position of the car to the position of the input place name, and judges on the basis of the distance of a common portion between the routes whether the direction of the input place name is the same as the direction of the destination.
Claim 9
Dependent Claim
56 words
The car navigation system as claimed in claim 1, wherein said route judgment means sets a prescribed area at both sides of a line connecting the current position of the car and the destination, and judges the input place name to be suitable as a via-place if the input place name is within the set area.
Claim 10
Dependent Claim
54 words
The car navigation system as claimed in claim 1, wherein when the destination is far away from the current position of the car, said route judgment means judges the input place name to be suitable as a via-place if the input place name is located at a prescribed distance or less from the destination.
Claim 11
Dependent Claim
81 words
A car navigation system as claimed in claim 1, wherein when the input place name contains a route on which the car can run at a higher speed than on a general road, said route judgment means converts the distance of the route to a shorter value than the actual distance thereof to calculate the distance to the destination, and a route through which the car arrives at the destination most early is selected on the basis of the converted distance.
Claim 12
Dependent Claim
20 words
The car navigation system as claimed in claim 1, wherein said route judgment result output means comprises a voice synthesizer.
Claim 13
Dependent Claim
79 words
The car navigation system as claimed in claim 1, wherein said judgment result output means comprises an image display device having a screen, wherein said image display device displays a map containing the current position of the car on the screen and further displays a line extending from the current position of the car to the destination and a line extending from the current position of the car to the position of the input place name on the screen.
Claim 14
Dependent Claim
106 words
A navigation method for a vehicle navigation system, comprising the steps of: 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.
Claim 15
Dependent Claim
106 words
A navigation method for a vehicle navigation system, comprising the steps of: 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.
Claim 16
Dependent Claim
23 words
A navigation method according to claim 13 further comprising obtaining said place name from a road sign on route to said desired destination.
References Cited (Backward Citations)
JPS60202307A
Cited
US4827420A
Cited
US5191532A
Cited
US4992947A
Cited
US5115399A
Cited
US5107433A
Cited
JPH03257485A
Cited
US5486822A
Cited
JPH04219872A
Cited
JPH0599678A
Cited
US5359527A
Cited
US5353034A
Cited
US5508931A
Cited
US5452212A
Cited
US5422815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-18 | 2001-11-17 | 2002-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-18 | 2005-11-17 | 2006-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-18 | 2009-11-17 | 2010-05-19 | $7700.00 | Window Closed / Lapsed |