METHOD AND APPARATUS FOR A COLOR FILTER
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United States of America Patent
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Issued Date -
Sep 19, 2013
app pub date -
Sep 12, 2012
filing date -
Sep 12, 2011
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Abstract
A method and apparatus for a color filter that utilizes a wavelength conversion material such as phosphor to filter an input light. The input light contains unwanted shorter wavelength light and wanted longer wavelength light. The wavelength conversion material converts the light in the unwanted shorter wavelength range to the wanted longer wavelength range, and transmits the light in the wanted longer wavelength range, to generate an output light in the longer wavelength range. The filter may be a transmissive type of a reflective type. The filter may be constructed as a moving filter such as a rotating wheel.
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