Shutter opening and closing apparatus for beam projector

Details Shutter opening and closing apparatus for beam projector Shutter opening and closing apparatus for beam projector

2006-05-24

2010-02-09

Dowling, William C (Department: 2851)

Optics: image projectors

Housing

C359S511000

Reexamination Certificate

active

07658500

ABSTRACT:
A shutter opening and closing apparatus for protecting a projection lens of a beam projector, wherein a shutter member is provided at an exterior case for selectively opening and closing an opening for exposing the light output surface of the projection lens and a driving unit mounted separately from the shutter member for driving the shutter member whereby the apparatus can be used as a wall hanging slim beam projector or a stand-up type slim beam projector capable of operating with a reduced consumption of electricity because of its compact, light-weight construction.

REFERENCES:
patent: 7021773 (2006-04-01), Ishino
patent: 7070285 (2006-07-01), Wu
patent: 7344255 (2008-03-01), Hara et al.
patent: 7438486 (2008-10-01), Ho
patent: 2003/0152381 (2003-08-01), Tanabe
patent: 2005/0030493 (2005-02-01), Wu
patent: 2007/0274029 (2007-11-01), Lee et al.

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