Signal light using phosphor coated LEDs
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United States of America Patent
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Oct 13, 2009
Grant Date -
Aug 7, 2008
app pub date -
Apr 10, 2008
filing date -
Dec 30, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A method for creating an improved signal light is disclosed. For example, the improved signal light includes a housing, one or more first type of light emitting diodes (LEDs) emitting a light energy having a first dominant wavelength deployed in the housing, one or more second type of LEDs emitting a light energy having a second dominant wavelength deployed in the housing, a filter and a mixer. The filter may filter the light energy of the one or more second type of LEDs such that only a third dominant wavelength passes from the one or more second type of LEDs. The mixer may mix the light energy having the first dominant wavelength and the filtered light energy having the third dominant wavelength to form a light energy having a desired fourth dominant wavelength.
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