LIGHT EMITTING DIODE (LED) BASED LIGHTING SYSTEMS
First Claim
1. A lighting system comprising:
- at least one blue emitting LED configured to emit blue excitation light having a wavelength ranging from 420 nm to 470 nm;
a shade located remotely to the at least one LED and configured to at least in part surround the LED to thereby prevent at least in part direct viewing of the at least one LED, wherein the shade is configured such that blue excitation light travels in free-space a distance of at least one centimeter from the at least one LED to the shade; and
a first phosphor provided as a layer on at least a part of an inner and/or outer surface of the shade;
wherein the phosphor emits light of a different wavelength in response to incident excitation light, and wherein the combined light from the LED and the phosphor generate a desired color of light.
2 Assignments
0 Petitions
Accused Products
Abstract
A lighting system comprises at least one excitation source (5), preferably an LED, operable to generate and radiate excitation radiation of a first wavelength (λ1); a shade (4) configured to at least in part surround the at least one source (5) and remotely located thereto; and at least one phosphor (16) provided in or on at least a part of the shade (4), wherein the phosphor (16) emits radiation of a different wavelength in response to incident excitation radiation. The phosphor can be provided on a part of an outer or inner surface of the shade. Alternatively, or in addition, the phosphor is incorporated within the shade. The lighting system finds particular application as a hanging, a desk, a floor standing, a wall mountable, a spot, an outdoor or an accent lighting fixture.
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Citations
23 Claims
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1. A lighting system comprising:
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at least one blue emitting LED configured to emit blue excitation light having a wavelength ranging from 420 nm to 470 nm; a shade located remotely to the at least one LED and configured to at least in part surround the LED to thereby prevent at least in part direct viewing of the at least one LED, wherein the shade is configured such that blue excitation light travels in free-space a distance of at least one centimeter from the at least one LED to the shade; and a first phosphor provided as a layer on at least a part of an inner and/or outer surface of the shade; wherein the phosphor emits light of a different wavelength in response to incident excitation light, and wherein the combined light from the LED and the phosphor generate a desired color of light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A lighting system comprising:
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at least one blue emitting LED configured to emit blue excitation light having a wavelength ranging from 420 nm to 470 nm; a shade located remotely to the at least one LED and configured to at least in part surround the LED to thereby prevent at least in part direct viewing of the at least one LED, wherein the shade is configured such that blue excitation light travels in free-space a distance of at least one centimeter from the at least one LED to the shade; and a first phosphor incorporated in and dispersed throughout the shade; wherein the phosphor emits light of a different wavelength in response to incident excitation light, and wherein the combined light from the LED and the phosphor generate a desired color of light that appears white in color to the eye. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A lighting system comprising:
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a housing having an opening; at least one blue emitting LED housed in the housing and configured to emit blue excitation light having a wavelength ranging from 420 nm to 470 nm; a shade covering the housing opening such that light emitted by the system is emitted through the shade, the shade being configured such that blue excitation light travels in free-space a distance of at least one centimeter from the at least one LED to the shade; and a first phosphor that emits light of a different wavelength in response to incident excitation light, wherein the combined light from the LED and the phosphor generate a desired color of light that appears white in color to the eye; and wherein the first phosphor is selected from the group consisting of being;
provided as a layer on at least a part of an inner surface of the shade;
provided as a layer on an outer surface of the shade; and
incorporated in and dispersed throughout the shade. - View Dependent Claims (20, 21, 22, 23)
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Specification