Led lighting system with helical fiber filament

F - Mech Eng,Light,Heat,Weapons – 21 – V

Patent

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F21V 7/04 (2006.01)

Patent

CA 2614439

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.

L'invention concerne un système d'éclairage comprenant une fibre de transmission lumineuse hélicoïdale et une DEL. La fibre de transmission lumineuse hélicoïdale est dopée avec un premier matériau convertisseur de longueur d'onde et définit un axe hélicoïdal. La DEL comprend une partie électroluminescente qui émet de la lumière d'une première couleur. La DEL est alignée axialement sur la première fibre hélicoïdale de manière qu'une partie de toute lumière émise par la DEL passe à travers l'espace ouvert entre les spires de la première fibre hélicoïdale et une partie de toute lumière émise par la DEL est reçue par la première fibre hélicoïdale et convertie en une lumière d'une seconde couleur. En réglant la compression de la fibre hélicoïdale, on règle le mélange des couleurs de la lumière émise par le système. En outre, la section transversale relativement petite de la fibre sert à réduire une quelconque migration de colorant dans la fibre.

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