| 摘要 |
PROBLEM TO BE SOLVED: To obtain a phosphor composition being excellent in deterioration resistance even in a high-current drive and in addition having good luminance characteristics and color purity by mixing SrGa2S4:Eu phosphor with a Y3(Al, Ga)5O12:Tb phosphor. SOLUTION: This composition comprises 5-50 mass % SrGa2S4:Eu phosphor and 50-95 mass % Y3(Al, Ga)5O12:Tb phosphor or comprises 5-20 mass % SrGa2 S4:Eu phosphor, 60-90 mass % Y3(Al, Ga)5O12:Tb phosphor, and 5-20 mass % LaOCl:Tb phosphor. These phosphors are dry-mixed, and the mixture is thoroughly mixed with a 0.1% K2SiO3 solution to prepare a dispersion. The dispersion is then added to a Ba(NO3)2 solution, the resultant solution is placed on a glass panel and subjected to a precipitation method to form a fluorescent film on the panel. The formed panel is used after being processed so as to be suitable for use. The use of SrGa2S4:Eu phosphor, enables to improve luminance characteristics, deterioration resistance, and after-flow characteristics.
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