TERBIUM-ACTIVATED RARE EARTH MAGNESIUM ALUMINATE PHOSPHOR, METHOD FOR PRODUCING THE SAME, AS WELL AS FLUORESCENT LAMP FOR BACKLIGHT AND LIQUID CRYSTAL DISPLAY DEVICE USING THE PHOSPHOR

摘要

PROBLEM TO BE SOLVED: To provide a phosphor for backlight excellent in life characteristics, and to provide a fluorescent lamp and an image display device using the phosphor.;SOLUTION: The fluorescent lamp for backlight has a fluorescent film that emits light excited by vacuum ultraviolet or ultraviolet ray whose wavelength is ≥170 nm and ≤300 nm, wherein the fluorescent film contains a terbium-activated rare earth magnesium aluminate phosphor represented by formula [1]: (L_xCe_yTb_1-x-y)₂O₃zMgO nAl₂O₃, wherein L is at least one sort of rare earth element selected from the group consisting of La, Gd, and Y, and x, y, z, and n are each a number satisfying conditions of 0x0.95, 0≤y0.95, 0.1z4.0, and 7≤n.;COPYRIGHT: (C)2011,JPO&INPIT