Solid state light engine optical system
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United States of America Patent
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Dec 26, 2006
Grant Date -
Feb 17, 2005
app pub date -
Apr 24, 2003
filing date -
Apr 24, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical system for use in projection based displays includes a plurality of solid state light sources associated with a plurality of total internal reflection based compound hyperbolic emitters, a graduated dichroic filter based device for homogenizing light output from the plurality of solid state light sources, a ferro-electric liquid crystal on silicon device for illumination with light output from the array of solid state light sources, and a polarization diffuser for homogenization of light at the ferro-electric liquid crystal on silicon device, wherein the polarization diffuser is positioned at a point in space, in the optical system, where the size of a beam of light transmitted from the graduated dichroic filter based device is substantially at a maximum.
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