Phosphor converted light emitting diode
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United States of America Patent
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Jul 9, 2002
Issued Date -
N/A
app pub date -
Apr 4, 2001
filing date -
Apr 4, 2001
priority date (Note) -
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Abstract
A method of fabricating a light emitting device includes providing a light emitting diode that emits primary light, and locating proximate to the light emitting diode a (Sr.sub.1-u-v-x Mg.sub.u Ca.sub.v Ba.sub.x)(Ga.sub.2-y-z Al.sub.y In.sub.z S.sub.4):Eu.sup.2+ phosphor material capable of absorbing at least a portion of the primary light and emitting secondary light having a wavelength longer than a wavelength of the primary light. The composition of the phosphor material can be selected to determine the wavelengths of the secondary light. In one embodiment, the light emitting device includes the phosphor material dispersed as phosphor particles in another material disposed around the light emitting diode. In another embodiment, the light emitting device includes the phosphor material deposited as a phosphor film on at least one surface of the light emitting diode.
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