Projector
US6793346B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2003 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Jan 21, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3102
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection lens (46) is located at an end of an optical unit (4) of approximately planarly-viewed L-shape, the projection lens enlarging and projecting a color image combined by a cross dichroic prism of an optical device body and including a linearly-advancing barrel (46B) fixed to a head (49) formed on an optical component casing, a cam barrel (46C) provided with a lever (46A), zoom-magnification converting lenses, focus-adjusting lenses and fixed lens, the linearly-advancing barrel (46B) and the cam barrel (46C) being made of polycarbonate, where a control board is disposed above a projection lens (46) to planarly cover the projection lens (46).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.