Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hirotoshi Ichikawa0
Fusao Ishii0
Date of Patent
August 7, 2012
0Patent Application Number
123815860
Date Filed
March 12, 2009
0Patent Citations Received
Patent Primary Examiner
Patent 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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