PHOSPHOR PARTICLE, LIGHT-EMITTING DIODE, AND LIGHTING SYSTEM AND LIQUID CRYSTAL PANEL BACKLIGHT DE

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PROBLEM TO BE SOLVED : To provide phosphor particles which can minimize a variation in their amount, distribution and particle size in materials such as a resin or inorganic glass in which the phosphor particle is dispersed such as a sealing resin of a light emitter in a light emitting diode, and inorganic glass; a light-emitting diode including the phosphor particles and exhibiting a minimal variation of chromaticity; and a lighting system and a liquid crystal panel backlight device using the light-emitting diode. SOLUTION : The phosphor particles of spherical or substantially spherical shape have an average particle diameter of 5-50 μm and an average roundness of up to 0.3. The phosphor particles include a garnet phase having formula : (A1-xBx)3C5O12 wherein A is one or more kinds of rare earth elements selected from Y, Gd, and Lu; B is one or more kinds of rare earth elements selected from Ce, Nd, and Tb; C is one or more kinds of elements selected from Al and Ga; and x is 0.002≤x≤0.2. COPYRIGHT : (C)2012, JPO&INPIT