Display projection method and apparatus an optical input device therefor
US5400095A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Sep 17, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/7441
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a compact display projector and method of using it to project images under the control of image generating equipment, such as computers and television systems. An optical input device is built into the projector to enable optical control signals directed onto the projected image, to be discriminated for causing the image generating equipment to modify the projected image. A positionally adjusted mirror device is disposed in optical alignment with the optical input device to reflect the optical control signals back thereto, whereby the optical input device is readily aligned with the projected image to monitor it for the occurrence of any optical control signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.