Projector and control method therefor
US7976173B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2008 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Jan 13, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/2046
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed herein is a projector for projecting an image to a screen, including: a lamp configured to emit light; an elliptic reflecting mirror configured to reflect and condense the light from the lamp; an image display device configured to modulate the light reflected and condensed by the elliptic reflecting mirror with image data corresponding to the image to convert the reflected light into image light; a projection lens disposed between the screen and the image display device and configured to project the image light from the image display device to the screen; and a position adjustment mechanism configured to displace the bright point of the lamp from a first focus of the elliptic reflecting mirror to adjust the position of the lamp so as to decrease the effective light amount of the image display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.