Navigation device
US8315796B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2008 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Jun 24, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B29/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A navigation device includes a map database 5 that holds map data; a location and direction measurement unit 4 that measures the current location and direction of a vehicle; a route calculation unit 12 that, based on map data read from the map database 5, calculates a route from the current location measured by the location and direction measurement unit to a destination; a camera 7 that captures video images ahead of the vehicle; a video image acquisition unit 8 that acquires the video images ahead of the vehicle captured by the camera; a road width acquisition unit 16 that, based on road width data included in the map data read from the map database, calculates the width of a road segment that enters last into an intersection to which the vehicle is to be guided from among road segments that make up the route calculated by the route calculation unit; a video image composition processing unit 14 that limits the length of a portion that indicates a turning direction of a route guide arrow to the road width calculated by the road width acquisition unit, and that composes the arrow onto the video images acquired by the video image acquisition unit in a superimposing manner; and a dis…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.