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Inventor:
Ito; Toru
Address:
Nagoya, JP
No. of patents:
22
Patents:












Patent Number Title Of Patent Date Issued
6542471 Radio communication system for mobile objects and radio communication mobile station used in the April 1, 2003
Between communication equipment to be loaded in a vehicle and a base station, CDMA data communication is performed. A speed sensor detects a traveling speed. When the speed sensor crosses a speed determining value, a communication speed is changed. When the vehicle is at a halt or travel
6256578 Navigation system and navigation data processing method July 3, 2001
A basic navigation operating part implements basic navigating function, such as current position and route computation. Meanwhile, an extended program for extended navigating operation, typically used to present multimedia information, is described in a general-purpose language such as
6253152 Navigation controller June 26, 2001
A navigation controller includes, in addition to a main CPU in the form of a general purpose CPU, a media processor having a VLIW structure or an SIMD structure. The main CPU controls ordinary navigation actions and causes the media processor to perform a route calculation requiring
6253152 Navigation controller June 26, 2001
A navigation controller includes, in addition to a main CPU in the form of a general purpose CPU, a media processor having a VLIW structure or an SIMD structure. The main CPU controls ordinary navigation actions and causes the media processor to perform a route calculation requiring
6233520 Map data access method for navigation and navigation system May 15, 2001
There is provided a map data access method and device capable of reading out from a recording medium the map data requested by a navigation system and providing them to the system whether C language, etc. or JAVA (trademark), etc. is employed to constitute a processing program on the
6230098 Map data processing apparatus and method, and map data processing system May 8, 2001
On a vehicle side, map data storage section stores map data, which is to be updated by using the latest map data transmitted from an information center. The map data includes map data of a number of types, such as landmark information, drawing data, route calculation data. For drawing
6208918 Data recovery system and data recovery program recorded medium March 27, 2001
The present system executed data recovery without affecting other operations in the event that some recorded data has failed. In a database installed on a motor vehicle, program data, map data and the like used to carry out navigation are stored. If any set of these data has failed, a
6154152 Road data maintenance system and on-vehicle terminal apparatus compatible therewith November 28, 2000
Unpossessed road data is added to possessed road data stored in a road contour database of an information center. An on-vehicle terminal apparatus first compares a current position of a vehicle detected by a D-GPS unit against the road data stored in a storage section for storing roa
5990825 Positioning system and fixed station and positioning apparatus for employing the same November 23, 1999
DGPS data obtained from an FM broadcast wave is extracted by a DGPS data extraction section (226). Adjustment error, the accuracy of which is not very high, has been appended to correction data to be used in actual positioning correction within the obtained DGPS data. A correction value
5793631 Voice route-guidance system and method having a function for judging approachment to a decision August 11, 1998
A voice route-guidance system for vehicles which terminates its route-guidance when the vehicle arrives at the destination and even if the present position of the vehicle is measured with low accuracy. An approach judging unit judges that the vehicle approaches a point spaced apart from
5729217 Vehicle route guidance apparatus for reseaching for a route when vehicle goes out of route March 17, 1998
A route guidance section compares the current position provided by a current position determination section and the route provided by a route calculation section for detecting an off-route condition. When the off-route condition is detected, a re-searching key as well as the route an
5687083 Vehicle-guiding device for recognizing curved road and leading vehicle along curved road aurally November 11, 1997
A voice expression selection processing section recognizes a route from data from a route memory. When a vehicle has reached a junction, it is judged whether or not a curved road is present at the junction on the basis of connecting road number data from a junction data storage section,
5638279 Vehicle navigation system and navigation method June 10, 1997
A vehicle navigation system realizing a discrete display of the present position of a vehicle during a period from when the vehicle reaches a predetermined distance before an intersection until the vehicle passes the intersection. Especially, in a zone a short distance before the int
5635925 Volume control of aural guidance of vehicle route guidance apparatus June 3, 1997
An apparatus to facilitate volume control for route aural guidance. When supplying a guidance voice to a loudspeaker 34a, a voice control section 30 disconnects the loudspeaker 34a from audio and outputs the guidance voice through the loudspeaker. A volume control screen is displayed on
5568390 Navigation system to be mounted on vehicles October 22, 1996
A navigation system to be mounted on a vehicle for carrying out a route search and displaying the searched route. Traffic jam information and the like are obtained by an beacon receiver and an input part inputs time as a driving condition. An ECU executes a predetermined calculation base
5559511 Vehicle route guidance apparatus for re-searching for a new route when vehicle goes out of route September 24, 1996
A route guidance section compares the current position provided by a current position determination section and the route provided by a route calculation section for detecting an off-route condition. When the off-route condition is detected, a researching key as well as the route and
5506578 Volume control of aural guidance of vehicle route guidance apparatus April 9, 1996
An apparatus to facilitate volume control for route aural guidance. When supplying a guidance voice to a loudspeaker 34a, a voice control section 30 disconnects the loudspeaker 34a from audio and outputs the guidance voice through the loudspeaker. A volume control screen is displayed on
5475599 Vehicle navigation system December 12, 1995
In a vehicle navigation system, when a voice control part, which is displayed on a screen, is switched off, a voice control part inhibits voice guidance from being output to a speaker. Now, if a current-location/guide selection key is operated, the voice control part creates voice gu
5444629 Vehicle-guiding device for recognizing curved road and leading vehicle along curved road aurally August 22, 1995
A voice expression selection processing section recognizes a route from data from a route memory. When a vehicle has reached a junction, it is judged whether or not a curved road is present at the junction on the basis of connecting road number data from a junction data storage section,
5410486 Navigation system for guiding vehicle by voice April 25, 1995
A vehicle navigation system for orally issuing route guidance, capable of changing a point at which the route guidance is issued depending on the moving situation of a vehicle. The moving situation is at least one of a number of lanes in a road being traveled, a width of a crossroad
5371497 Navigation system for vehicles December 6, 1994
A navigation system for vehicles, capable of exactly and quickly showing guide information to a driver when two intersections to be negotiated are close to each other, is provided. A destination is input by an input part and a route to the destination is calculated from a present positio
5343399 Vehicle navigation system August 30, 1994
In a vehicle navigation system, when a voice control part, which is displayed on a screen, is switched off, a voice control part inhibits voice guidance from being output to a speaker. Now, if a current-location/guide selection key is operated, the voice control part creates voice gu










 
 
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