Map display system for vehicles
US4571684A · kind A · utility
72Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1984 |
| Grant date | Feb 18, 1986 |
| Priority date | — |
| Expiry date | Mar 23, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/367
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a map display system for vehicles, spot coordinates are preliminarily stored which represent map forming spots and are provided with a coordinate origin of a specified spot, and display coordinates indicating map changing frames are also preliminarily stored. The display coordinate of the present position of the vehicle is compared with the display coordinate of a map changing frame. When the present position reaches the map changing frame, the spot coordinate of the present position is compared with the preliminarily stored spot coordinates so as to extract spots forming a new map centering the present position of the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.