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US 2009/0153022 A1Published application
Phosphor distribution in LED lamps using centrifugal force
AssigneeCree, Inc.
InventorsChristopher P. Hussell, David T. Emerson
Life of this patent
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Abstract
A method of manufacturing an LED lamp is disclosed. The method includes admixing an uncured curable liquid resin and a phosphor, dispensing the uncured admixture on an LED chip, centrifuging the chip and the admixture to disperse the phosphor particles in the uncured resin, and curing the resin while the phosphor particles remain distributed.
Claims31
A method of manufacturing an LED lamp comprising:
- admixing an uncured curable liquid resin and a phosphor;
- dispensing the uncured resin on an LED chip;
- and
- centrifuging the chip and the admixture to position the phosphor particles at a desired position with respect to the LED chip in the uncured resin.
1 more element
An apparatus for manufacturing light emitting diode lamps, said apparatus comprising:
- a centrifuge having at least one arm;
- a cup positioned adjacent the outer end of said arm;
- an LED chip in said cup;
- and
- an admixture in said cup of an uncured curable resident with a plurality of phosphor particles.
2 more elements
A method of manufacturing an LED lamp comprising:
- admixing an uncured polysiloxane resin and a phosphor that emits predominantly in the yellow portion of the spectrum when excited by frequencies from the blue portion of the visible spectrum;
- placing the uncured admixture and an LED chip formed from the Group III nitride material system and that emits in the blue portion of the visible spectrum into a reflector;
- centrifuging the reflector and the admixture to position the phosphor particles adjacent the LED chip in the uncured polysiloxane resin;
- and
- curing the resin while the phosphor particles remain positioned adjacent the LED chip.
2 more elements
A method of manufacturing an LED lamp comprising:
- admixing a phosphor can be admixed with a relatively volatile liquid such as an organic solvent;
- dispensing the admixture on an LED chip;
- centrifuging the admixture to position the phosphor particles adjacent the chip in the volatile liquid;
- and
- removing the volatile liquid to leave the phosphor in position on the chip.
2 more elements
An LED lamp comprising:
- an LED chip;
- and
- a cured resin and a phosphor wherein said phosphor is positioned by centrifuging prior to the resin being cured.
Dependencies are inferred from the claim text.