Digital system for generating laser-modulation multi-channel circuit control signals for an oscillating mirror projector of scanned images
US4931874A · kind A · utility
6Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1988 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Mar 18, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N3/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To compensate for the non-linearity of the oscillations of the line galvanometer of a scanned image projector with oscillating mirrors, compensation circuits are used. These compensation circuits act on the video signal by modulating the duration of the pixels of the digitized video signal and their position in the period of the line, in a manner that is inversely proportionate to the instantaneous speed of the galvanometer. The system can be applied to fighter aircraft simulators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.