Projector with illuminating light collecting unit
US5980046A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Feb 19, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/208
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal projector with an illuminating light collecting unit which can efficiently collect illuminating light emitted from a lamp of the projector to a scrambler. The projector with an illuminating light collecting unit, includes: a lamp for emitting illuminating light; a reflector for reflecting the illuminating light; a rod-shaped scrambler for guiding the reflected illuminating light to pass therethrough; an illuminating light collecting unit for collecting and diffusing the reflected illuminating light in order to prevent the fluctuation of the illuminating light which may occur at a region between the scrambler and the lamp; and a projection lens for projecting the illuminating light which has passed through the scrambler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.