Route guide system
US6278941A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Feb 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/096872
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In order to enable a location function for telling the present position on a screen as a function usually used when traveling in a known area to be always used by its lone, a navigation apparatus 100 mounted on a car stores display map data in it, and displays a map of an area around a present position and the present position together on a display portion 106. It is attained to reduce the amount of stored data and the burden of processing on the navigation apparatus 100 by receiving a traveling route to a destination from a center apparatus 150 in case that a traveling route guidance to the destination is needed. Data of the whole traveling route to a destination are not transmitted at one time but data of only a traveling route from the present position to a specific distance ahead are transmitted at one time and thereby it is possible to reduce the amount of data of communication and start the car earlier. And by newly finding a traveling route to the destination before each transmission of a divided route, it is possible to transmit the optimum traveling route in consideration of the latest traffic information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.