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

Publication
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: Special Section INVITED PAPER (Special Section on Electronic Displays)
Category: 
Keyword: 
light-emitting diode,  phosphor,  nitride,  illumination,  

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Summary: 
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.