Presentation system
US7027041B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2002 |
| Grant date | Apr 11, 2006 |
| Priority date | — |
| Expiry date | Aug 4, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B19/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A presentation system comprises: a screen device; a projecting device for projecting an image onto the screen device; an indication mark for setting two reference points, which is two orthogonal points on a rectangular virtual screen, near a presenter and for the presenter operating a point on the virtual screen; a photographing device for photographing the virtual screen and the indication mark; and an arithmetic operation device for generating coordinates of the virtual screen from the two reference points photographed by the photographing device, and for calculating coordinates of the indication mark on the generated virtual screen. The projecting device projects a point image onto the coordinates of the indication mark on the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.