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8477236 
Journal Article 
n-UV plus blue/green/red white light emitting diode lamps 
Kuo, CH; Sheu, JK; Chang, SJ; Su, YK; Wu, LW; Tsai, JM; Liu, CH; Wu, RK; , 
2003 
Yes 
Japanese Journal of Applied Physics
ISSN: 0021-4922
EISSN: 1347-4065 
JAPAN SOC APPLIED PHYSICS 
TOKYO 
2284-2287 
WOS:000183283700101 
Phosphor-conversion light-emitting diode (LED) lamps were fabricated by precoating blue/green/red phosphors onto near-ultraviolet (n-UV) LED chips prior to packaging them into LED lamps. With a 20 mA injection current, it was found that the color temperature, T-c, was approximately 5900K, the color rendering index, R-a, was approximately 75, and the CIE color coordinates were x = 0.33 and y = 0.35 for the "n-UV+blue/green/red" white LED lamps. No obvious changes in color temperature, T-c, or color-rendering index, R,, could be observed when we increased the injection from 20 mA to 60 mA. These results indicate that such "n-UV+blue/green/red" white LED lamps are much more optically stable than the conventional "blue+yellow" LED lamps. 
International Conference on Solid State Devices and Materials (SSDM 2002) 
NAGOYA, JAPAN