LIGHT EMITTING DIODE LIGHTING SYSTEM
First Claim
1. A lighting system comprising:
- a plurality of flexible elongate light transmissive waveguides having a light emitting surface;
at least one phosphor provided over at least a part of a light emitting surface of the flexible waveguides anda plurality of light emitting diodes operable to generate blue excitation light having a peak emission wavelength greater than 450 nm,the lighting system being configured such that excitation light is coupled into each of the waveguides such that it propagates throughout the volume of each flexible waveguide and is then emitted through the light emitting surface and wherein at least a part of the excitation radiation excites the at least one phosphor which emits light of a different color.
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Accused Products
Abstract
A lighting system for generating an illumination product comprises an excitation source, blue/UV LED, operable to generate excitation radiation and a remotely located phosphor, photo luminescent material. Excitation radiation is guided from the excitation source to the phosphor by a waveguiding medium, the waveguiding medium being configured such that the distance the radiation travels from the excitation source to the phosphor layer is at least one centimeter in length. The UV/blue excitation source provides excitation radiation to the phosphor(s), causing the phosphor(s) to photo luminesce, and it may also provide a component of the final illumination product. The configuration of the waveguide allows a greater flexibility in lighting system configurations, such as hanging lighting fixtures, desk lighting fixtures, floor standing lighting fixtures, desk lamps, track lighting, spot lighting, accent lighting, lighting panels, inspection lamps and endoscopes.
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Citations
17 Claims
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1. A lighting system comprising:
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a plurality of flexible elongate light transmissive waveguides having a light emitting surface; at least one phosphor provided over at least a part of a light emitting surface of the flexible waveguides and a plurality of light emitting diodes operable to generate blue excitation light having a peak emission wavelength greater than 450 nm, the lighting system being configured such that excitation light is coupled into each of the waveguides such that it propagates throughout the volume of each flexible waveguide and is then emitted through the light emitting surface and wherein at least a part of the excitation radiation excites the at least one phosphor which emits light of a different color. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17)
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Specification