Imaging system and projection apparatus having light beam modulation module
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United States of America Patent
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Sep 7, 2010
Grant Date -
Jan 24, 2008
app pub date -
May 14, 2007
filing date -
Jul 20, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
An imaging system suitable for projecting an image beam provided by a light valve unto a screen is provided. The imaging system includes a projection lens and a light beam modulation module. The projection lens is disposed on an optical path of the image beam, so as to project the image beam unto the screen. The light beam modulation module comprising a fixed light shutter and a movable light shutter is disposed between the projection lens and the light valve. The fixed light shutter is disposed on the optical path of the image beam so as to shield off a portion of the circumferential light of the image beam. The movable light shutter is suitable for moving into the optical path of the image beam to shield off another portion of the circumferential light of the image beam.
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