Light emitting device incorporating a luminescent material
First Claim
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1. A semiconductor based light emitting device comprising:
- a light emitting diode that emits an exciting radiation;
a porous matrix covering at least a portion of said light emitting diode, and a substance loaded into said porous matrix which emits a responsive radiation upon interaction with the exciting radiation emitted by said diode.
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Abstract
A light emitting device uses a source of exciting radiation such as an light emitting diode to excite a photo luminescent material to provide a source of visible light. The photo luminescent material is loaded into a low density material such as a xerogel or an aerogel which is adjacent the source of exciting radiation
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Citations
76 Claims
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1. A semiconductor based light emitting device comprising:
- a light emitting diode that emits an exciting radiation;
a porous matrix covering at least a portion of said light emitting diode, and a substance loaded into said porous matrix which emits a responsive radiation upon interaction with the exciting radiation emitted by said diode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 65, 66, 67)
- a light emitting diode that emits an exciting radiation;
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26. A light emitting device comprising:
- a light emitting diode that emits an exciting radiation, said light emitting diode having a silicon carbide substrate and an active layer that includes at least one Group III nitride;
a porous matrix covering at least a portion of said light emitting diode, and a photoluminescent material loaded into said porous matrix which emits visible light upon interaction with the exciting radiation emitted by said diode. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 68, 69, 70)
- a light emitting diode that emits an exciting radiation, said light emitting diode having a silicon carbide substrate and an active layer that includes at least one Group III nitride;
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39. A light emitting device comprising:
- a laser diode that emits an exciting radiation, said laser diode having a silicon carbide substrate and an active layer that includes at least one Group III nitride;
a porous matrix covering at least a portion of said laser diode, and a photoluminescent material loaded into said porous matrix which emits a responsive radiation upon interaction with the exciting radiation emitted by said laser diode. - View Dependent Claims (40, 41, 42, 43, 44, 71, 72, 73)
- a laser diode that emits an exciting radiation, said laser diode having a silicon carbide substrate and an active layer that includes at least one Group III nitride;
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45. A semiconductor-based light emitting device comprising:
- a light emitting diode that includes a single crystal silicon carbide substrate a porous matrix on said diode and selected from the group consisting of aerogels and xerogels; and
a phosphor loaded in said matrix and that responds to the emission from said diode with a secondary emission of a different wavelength. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 74, 75, 76)
- a light emitting diode that includes a single crystal silicon carbide substrate a porous matrix on said diode and selected from the group consisting of aerogels and xerogels; and
Specification