Polarized light emitting diode (LED) color illumination system and method for providing same
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United States of America Patent
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Feb 5, 2008
Grant Date -
Jul 27, 2006
app pub date -
Jun 22, 2005
filing date -
Jan 25, 2005
priority date (Note) -
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Abstract
A polarized light illumination system includes a light emitting diode (LED) (601, 602, 603) for providing a source of light that is directed to a non-polarizing dichroic combiner (607) for combining light from the LEDs into a single light source. A power beam splitter (PBS) (608) is then used for splitting the single light source into polarized light components and an output waveguide (611) operates to provide a source of uniformly illuminated light. A condenser lens (612) then projects the uniformly illuminated light to a microdisplay panel (613) for use with a television receiver or other type of display monitor.
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