Light emitting diode lighting system
First Claim
1. A lighting panel comprising:
- a substantially planar waveguide having at least one light emitting face, wherein at least one edge of the waveguide comprises a light reflective layer;
a plurality of light emitting diodes that are located on the at least one edge or one or more other edges of the waveguide and are operable to generate blue excitation light having a peak emission wavelength greater than 450 nm;
a heat sink around at least a part of a surface of the at least one edge of the waveguide, the heat sink being in thermal communication with the plurality of light emitting diodes; and
at least one phosphor provided adjacent to the at least one light emitting face of the waveguide, whereinthe lighting panel being configured such that excitation light is coupled into the at least one edge of the waveguide such that it propagates through the waveguide and is then emitted through the light emitting face,at least a part of the excitation radiation excites the at least one phosphor which in response emits light of a different color, andan illumination product of the system comprises a combination of the blue excitation light and photo luminescent light emitted by the at least one phosphor.
2 Assignments
0 Petitions
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.
7 Citations
19 Claims
-
1. A lighting panel comprising:
-
a substantially planar waveguide having at least one light emitting face, wherein at least one edge of the waveguide comprises a light reflective layer; a plurality of light emitting diodes that are located on the at least one edge or one or more other edges of the waveguide and are operable to generate blue excitation light having a peak emission wavelength greater than 450 nm; a heat sink around at least a part of a surface of the at least one edge of the waveguide, the heat sink being in thermal communication with the plurality of light emitting diodes; and at least one phosphor provided adjacent to the at least one light emitting face of the waveguide, wherein the lighting panel being configured such that excitation light is coupled into the at least one edge of the waveguide such that it propagates through the waveguide and is then emitted through the light emitting face, at least a part of the excitation radiation excites the at least one phosphor which in response emits light of a different color, and an illumination product of the system comprises a combination of the blue 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, 18, 19)
-
-
17. A method for providing a lighting panel comprising:
-
providing a substantially planar waveguide having at least one light emitting face on a substantially planar surface of the waveguide, wherein at least one edge of the waveguide comprises a light reflective layer; providing, via a plurality of light emitting diodes on the at least one edge or one or more other edges of the waveguide, a blue excitation light source having a peak emission wavelength greater than 450 nm; providing a heat sink around at least a part of a surface of the at least one edge of the waveguide, the heat sink being in thermal communication with the plurality of light emitting diodes; providing at least one phosphor adjacent to the at least one light emitting face of the waveguide; and configuring the lighting panel such that excitation light is coupled into at least one edge of the waveguide such that it propagates through 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.
-
Specification