LIGHT EMITTING DIODE LIGHTING SYSTEM
First Claim
1. A lighting panel comprising:
- a substantially planar waveguide having at least one light emitting face;
a plurality of light emitting diodes operable to generate blue excitation light having a peak emission wavelength greater than 450 nm; and
at least one phosphor provided over at least one face of the waveguide,the lighting panel being configured such that excitation light is coupled into at least one edge of the waveguide such that it propagates throughout the volume of the waveguide and is then emitted through the light emitting face and wherein at least a part of the excitation radiation excites the at least one phosphor which in response emits light of a different color and wherein the illumination product of the system is a combination of the excitation light and photo luminescent light emitted by the at least one phosphor.
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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.
17 Citations
16 Claims
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1. A lighting panel comprising:
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a substantially planar waveguide having at least one light emitting face; a plurality of light emitting diodes operable to generate blue excitation light having a peak emission wavelength greater than 450 nm; and at least one phosphor provided over at least one face of the waveguide, the lighting panel being configured such that excitation light is coupled into at least one edge of the waveguide such that it propagates throughout the volume of the waveguide and is then emitted through the light emitting face and wherein at least a part of the excitation radiation excites the at least one phosphor which in response emits light of a different color and wherein the illumination product of the system is a combination of the excitation light and photo luminescent light emitted by the at least one phosphor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification