Projection apparatus using micromirror device
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United States of America Patent
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Aug 7, 2012
Grant Date -
Jul 16, 2009
app pub date -
Mar 12, 2009
filing date -
Nov 1, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A projection apparatus comprising a micromirror device for reflecting and modulating a light emitted from a light source to project a display an image on a display screen. The projection apparatus further includes a projection optical system comprises an adjustable aperture for adjusting an aperture ratio to control an amount of output light reflected from the micromirror device to the image display screen.
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