Means to increase the light output by the illuminator in a LCoS based light engine
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United States of America Patent
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Issued Date -
Apr 13, 2006
app pub date -
Oct 8, 2004
filing date -
Oct 8, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A phosphor layer is positioned to absorb UV light and re-radiate usable light in other wavelengths. The UV light is reflected to the phosphor by a thin film placed in a light path. The phosphor re-radiates the usable light in a direction of the light path. Curved mirrors or directive reflectors are utilized to direct some of the re-radiated light toward the light path. In one embodiment, usable light in the light path is reflected by a thin film, UV light is passed by the thin film toward the phosphor, and the re-radiated light is directed toward the reflected visible light path.
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