Projection apparatus
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United States of America Patent
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Nov 9, 2010
Grant Date -
Mar 27, 2008
app pub date -
Jul 18, 2007
filing date -
Sep 21, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A projection apparatus including an illumination system, a light valve, a first optical element, a first projection lens, and a second projection lens is provided. The illumination system is suitable to provide an illumination beam, and the light valve is disposed on a transmission path of the illumination beam. The light valve is suitable to convert the illumination beam into an image beam. The first optical element is disposed on a transmission path of the image beam. A portion of the image beam is reflected by the first optical element, and a remaining portion of the image beam passes through the first optical element. The first projection lens is disposed on a transmission path of the image beam passing through the first optical element, and the second projection lens is disposed on a transmission path of the image beam reflected by the first optical element.
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