Light amount control apparatus and projector apparatus using...

Details Light amount control apparatus and projector apparatus using... Light amount control apparatus and projector apparatus using...

2007-02-27

2007-02-27

Dowling, William C. (Department: 2851)

Optics: image projectors

Light shield, mask, hood, or diaphragm

C362S283000, C362S322000, C359S236000

Reexamination Certificate

active

11082818

ABSTRACT:
A light amount control apparatus includes a pair of light amount control plates arranged at side edge portions of a light path, a driving device having a drive rotating shaft, and a transmitting member for transmitting rotation of the drive rotating shaft to the light amount control plates. The light amount control plates are supported by the rotating support shafts at two side edges of the light path to pivot in an advancing direction of the light path. The drive rotating shaft is arranged substantially parallel to the rotating support shafts. A transmitting member includes a first gear assembly connected to the drive rotating shaft, and a second gear assembly rotated in a direction reverse thereto. One light amount control plate is fixedly supported by the first gear assembly, and the other light amount control plate is fixedly supported by the second gear assembly.

REFERENCES:
patent: 6755538 (2004-06-01), Sugawara
patent: 6769777 (2004-08-01), Dubin et al.
patent: 6854851 (2005-02-01), Yamasaki et al.
patent: 2002/0109992 (2002-08-01), Wang
patent: 2006/0050248 (2006-03-01), Koga et al.
patent: 2000-28988 (2000-01-01), None
patent: 2003-121938 (2003-04-01), None

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