Optical resizing apparatus
US5860721A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1997 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Jun 9, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/74
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixellated light valve projector with optical image resizing, comprising: a) a lamp and optical integrator for generating a rectangular beam of light according to a predetermined aspect ratio; b) a pixellated panel for generating a rectangular image of a video signal in any one of a plurality of native pixel formats; c) a relay optical system intermediate the optical integrator and the pixellated panel for automatically concentrating the light onto the image in accordance with the one of the plurality of native pixel formats; d) a projection screen; and e) a projection lens for projecting the image onto the projection screen so that the projected image fills the projection screen in accordance with the one of the plurality of native pixel formats while image brightness level is maintained by concentrating the light onto the image on the pixellated panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.