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US 6,682,207 B2Granted
Green phosphor converted light emitting diode
AssigneeLumileds Lighting U.S., LLC
InventorsAndreas G. Weber, Gregory M. Cutler, William R. Trutna, Jr., Gerd O. Muller, Regina B. Muller-Mach
Life of this patent
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Abstract
A light emitting device comprises a light emitting diode that emits primary light and a SrGa2S4:Eu2+ phosphor material capable of absorbing at least a portion of the primary light and emitting secondary light. The secondary light includes a wavelength longer than a wavelength of the primary light.
Claims14
A light emitting device comprising:
- a light emitting diode that emits primary light;
- and
- a SrGa2S4:Eu2+ phosphor material capable of absorbing at least a portion of said primary light and emitting secondary light including a wavelength longer than a wavelength of said primary light;
- wherein the phosphor material is positioned such that at least a portion of the primary light is incident on the phosphor material prior to being incident on an optic.
1 more element
A method of fabricating a light emitting device, the method comprising:
- providing a light emitting diode that emits primary light;
- and
- positioning a SrGa2S4:Eu2+ phosphor material relative to said light emitting diode such that said phosphor material can absorbs at least a portion of said primary light and emits secondary light including a wavelength longer than a wavelength of said primary light;
- wherein the phosphor material is positioned such that at least a portion of the primary light is incident on the phosphor material prior to being incident on an optic.
1 more element
Dependencies are inferred from the claim text.