Image display apparatus and projection optical system
US7753531B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2005 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Sep 10, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/001
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image display apparatus acquires a high-quality image by suppressing positional fluctuation of projected dots due to a positional offset of an optical path deflecting element. A spatial light modulation element (1) displays an image by projecting a light from an illumination light source. A projection optical system (3) enlarges and projects the image formed on the spatial light modulation element (1). An optical path deflecting element (2) is provided between the spatial light modulation element (1) and the image formed on a screen (4) so as to deflect an optical path in accordance with a screen frame period. The optical path deflecting element (2) shifts the optical path for the image projected on the screen (4) at a high rate so as to apparently increase a number of picture elements. The optical path deflecting element (2) is located within the projection optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.