Onboard navigational system
US5790975A · kind A · utility
12Cited by
19References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1997 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | May 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B29/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An onboard navigation system detects a condition that a recognized present position of the vehicle belongs to a map of a peripheral part of a region covered by map data groups recorded on a recording disc. If a changer type driver is used as a player for reproducing map data, the recording disc being played is changed to a new disc in response to the detection of the above described condition. If a single driver is used, identification information of a corresponding disc is displayed. With these features, the disc being played is quickly changed to a required new disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.