Illumination engine for a projection display using a tapered light pipe
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United States of America Patent
Stats
-
May 25, 2004
Grant Date -
Oct 24, 2002
app pub date -
Feb 5, 2002
filing date -
Feb 5, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An illumination engine for a projection display using a TLP including a reflector having a first focal point and second focal points. A source of electro-magnetic radiation disposed proximate to the first focal point of the reflector emits rays of radiation that reflect from the reflector toward the second focal point. A TLP collects and transmits substantially all of the radiation converged at the second focal point, adjusting the numerical aperture of the radiation, but curving the surface formed by the images of the radiation. A SLP or a lens collects and transmits substantially all of the radiation transmitted by the TLP, flattening the surface formed by the images of the radiation. A condenser lens collects and transmits substantially all of the radiation transmitted by the contoured delay element to a PBS and a projection system.
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Cited Art Landscape
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