Combined device for screen display and for the detection of the position of a location marker in relation to the screen with an infrared surfaced detector
US5440114A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Sep 27, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0386
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The disclosure relates to the display, by projection on a screen, of an image managed by a computer system and to the input of data into the data-processing system by the shifting of a location marker in relation to the screen. A device for display by the projection of an image on a screen incorporates a surface detector of infrared radiation positioned behind the projection objective by means of a mirror separating the visible radiation and the infrared radiation. This display device is complemented by an infrared emitter with directional radiation, with which the observer traces a location marker on the screen which may take the form of a visible pointer overprinted on the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.