White Light-Emitting Diode Lamps Using Oxynitride and Nitride Phosphor Materials

Ken SAKUMA  Naoto HIROSAKI  Naoki KIMURA  Masakazu OHASHI  Rong-Jun XIE  Yoshinobu YAMAMOTO  Takayuki SUEHIRO  Kenichiro ASANO  Daiichiro TANAKA  

IEICE TRANSACTIONS on Electronics   Vol.E88-C   No.11   pp.2057-2064
Publication Date: 2005/11/01
Online ISSN: 
DOI: 10.1093/ietele/e88-c.11.2057
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Section on Electronic Displays)
light-emitting diode,  phosphor,  nitride,  illumination,  

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White-light emitting diode lamps for general illumination can be realized by a combination of a blue light-emitting diode semiconductor die and phosphors. Newly developed oxynitride and nitride phosphors are promising candidates for this application because they have suitable excitation and emission wavelengths and stable optical properties in a high temperature environment. High brightness warm-white LED lamps have been realized using a yellowish-orange α-SiAlON oxynitride phosphor. High color-rendering index white LED lamps have been also realized using three color oxynitride/nitride phosphors.