| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrodeless discharge lamp capable of obtaining a required color temperature by correcting the mixed up emitted colors due to influence of a plasma generated in a tube. SOLUTION: Europium-activated yttrium oxide is used for a red-color (R) phosphor, cerium-, terbium-activated lanthanam phosphate for a green-color (G) phosphor, europium-activated barium magnesium aluminate for a blue-color (B) phosphor, and weight ratio of each RGB phosphor is to be 63.0 to 74.0:29.0 to 34.0:0 to 1.0 in order to get a light-bulb color, weight ratio of each RGB phosphor is to be 31.08 to 36.28:31.05 to 36.45:29.97 to 35.17. Further, the range of film thickness of the phosphors is to be not less than 15μm and not more than 20μm, and a coldest temperature range of the tube 10 is to be 43.3 (±2.4)°C. COPYRIGHT: (C)2004,JPO
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