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Recipient luminophoric mediums having narrow spectrum luminescent materials and related semiconductor light emitting devices and methods

United States Patent

December 30, 2014
View the Complete Patent at the US Patent & Trademark Office
Light emitting devices include a light emitting diode ("LED") and a recipient luminophoric medium that is configured to down-convert at least some of the light emitted by the LED. In some embodiments, the recipient luminophoric medium includes a first broad-spectrum luminescent material and a narrow-spectrum luminescent material. The broad-spectrum luminescent material may down-convert radiation emitted by the LED to radiation having a peak wavelength in the red color range. The narrow-spectrum luminescent material may also down-convert radiation emitted by the LED into the cyan, green or red color range.
LeToquin; Ronan P. (Fremont, CA), Tong; Tao (Oxnard, CA), Glass; Robert C. (Chapel Hill, NC)
Cree, Inc. (Durham, NC)
13/ 104,238
May 10, 2011
STATEMENT OF GOVERNMENT INTEREST The present invention was developed with Government support under Department of Energy Contract No. DE-FC26-08NT01577. The Government has certain rights in this invention