LED lighting system with helical fiber filament
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United States of America Patent
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Jul 10, 2007
Grant Date -
Jan 11, 2007
app pub date -
Jul 7, 2006
filing date -
Jul 8, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lighting system includes a helical light-transmitting fiber and an LED. The helical light-transmitting fiber is doped with a first wavelength converting material and defines a helical axis. The LED has a light-emitting portion for emitting light of a first color. The LED is aligned axially with the first helical fiber such that a portion of any light emitted by the LED will pass through the open space between the turns of the first helical fiber and a portion of any light emitted by the LED will be received by the first helical fiber and converted to light of a second color. Adjustment of the compression of the helical fiber will adjust the mixture of colors in the light emitted by the system. Further, the relatively small cross-sectional area of the fiber serves to lessen any dye migration in the fiber.
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