1
Robert H Borcherts, Jacek L Jurzak, Shih Ping Liou, Tse Liang A Yeh: System and method for automatically steering a vehicle within a lane in a road. Zexel Corporation, Harness Dickey & Pierce, September 14, 1993: US05245422 (370 worldwide citation)

An automatic vehicle steering system is provided for automatically steering a vehicle along a lane in a road. A video sensor is included for generating a plurality of frames of video images of the road. A computer processor analyzes the frames to determine the lane boundaries of the road and the pos ...


2
Peter Snider: Route guidance on/off-route state filter. Zexel Corporation, Townsend and Townsend and Crew, April 16, 1996: US05508931 (269 worldwide citation)

The invention provides a route state filter for a vehicle route guidance system for improved tracking of vehicle position with respect to a preselected route. A set of position possibilities are derived by comparing a measured vehicle position to a database containing data representing a map of road ...


3
Haruhisa Tamai: Navigation system for a vehicle with route recalculation between multiple locations. Zexel Corporation, Morrison Law Firm, March 4, 1997: US05608635 (161 worldwide citation)

A vehicle navigation system guides a driver along an optimal route from a starting point to a destination, either of which can be specified in categorical terms. That is, the starting point need not be on a road, and the categorical destination can be entered as "nearest gas station" or "closest har ...


4
Wei Wen Kao: Position correction method for vehicle navigation system. Zexel Corporation, Townsend and Townsend Khourie and Crew, December 20, 1994: US05374933 (158 worldwide citation)

A vehicle navigation system is used to determine the absolute position of a vehicle with improved accuracy on freeways or rural highways. First, the system stores a known vehicle position in its memory. As the vehicle moves away from the known position, the system uses a variety of means to sense ex ...


5
Peter Snider: Route guidance on/off-route state filter. Zexel Corporation, Townsend and Townsend Khourie and Crew, October 25, 1994: US05359529 (115 worldwide citation)

The invention provides a route state filter for a vehicle route guidance system for improved tracking of vehicle position with respect to a preselected route. A set of position possibilities are derived by comparing a measured vehicle position to a database containing data representing a map of road ...


6
Jeff Jyh Min Liaw, Simon Peter Desai, Haruhisa Tamai: Incremental route calculation. Zexel Corporation, Joseph M Hickman Beyer & Weaver Villeneuve, January 27, 1998: US05712788 (93 worldwide citation)

Method and apparatus for determining a route from a source location to a final destination using a vehicle navigation system having a map database. At least one intermediate destination is determined from the map database, each intermediate destination being at the other end of an intermediate route ...


7
Haruhisa Tamai, Tatsuhiko Abe: Navigation system. Zexel Corporation, Thomas R Morrison, March 1, 1994: US05291412 (87 worldwide citation)

A vehicle navigation system computes an optimal route from stored map data. Where the vehicle deviates from the optimal route, either by mistake or by choice, the driver can command computation of a new optimal route. The driver may choose whether or not to permit U-turns on the new route, thereby i ...


8
Haruhisa Tamai: Vehicle navigation system. Zexel Corporation, Pollock Vande Sande & Priddy, May 10, 1994: US05311434 (81 worldwide citation)

In a vehicle navigation system having memory for storing road map information, calculating unit for calculating the optimum route from a given initial location to the destination and display device for sequentially displaying the directions in which the vehicle operator should drive to follow the ro ...


9
Wei Wen Kao: Calibration method for a relative heading sensor. Zexel Corporation, Townsend and Townsend Khourie and Crew, August 8, 1995: US05440484 (78 worldwide citation)

The invention provides a direction sensor and a method of calibrating a direction sensor having a relative heading sensor and an absolute heading sensor. The method allows calibration of both the relative heading sensor and the absolute heading sensor at the same time, by taking advantage of the kno ...


10
Wei Wen Kao: Calibration method for a relative heading sensor. Zexel Corporation, Townsend and Townsend Khourie and Crew, September 6, 1994: US05345382 (78 worldwide citation)

The invention provides a direction sensor and a method of calibrating a direction sensor having a relative heading sensor and an absolute heading sensor. The method allows calibration of both the relative heading sensor and the absolute heading sensor at the same time, by taking advantage of the kno ...