Map display device
US6710774B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2000 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | May 1, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B29/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A map display device, which imparts a perspective feeling to a route guidance line so that it can be easily viewed, when buildings and roads are three-dimensionally displayed. A map display device having a control unit for three-dimensionally displaying a map and further three-dimensionally displaying a route guidance line on a road on the map. When the route guidance line is hidden by a building, the control unit displays overlapped portion of the route guidance line in a color different from the color of the portions that are not overlapping. In particular, the control unit draws picture by a semitransparent method in which the color displaying the route guidance line and the color displaying the building are alternately changing with a pixel as a unit on the video RAM (VRAM). In this case, a positional relationship becomes clear between the route guidance line and the building, and the route guidance line can be seen more clearly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.