COLD CATHODE FLUORESCENT LAMP

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PROBLEM TO BE SOLVED : To provide a cold cathode fluorescent lamp that has a uniform residual distribution of a three-wavelength phosphor in a bulb. SOLUTION : The cold cathode fluorescent lamp has mercury and one or more kinds of rare gases 5 sealed in the bulb 3, has a pair of discharge electrodes 1 at both ends of the bulb, and has a phosphor coating 2 including a three-wavelength phosphor composed of a red phosphor (Y2O3 : Eu), a green phosphor (LaPO4 : Ce, Tb) and a blue phosphor (BaMg2Al10O17 : Eu) formed on a bulb inner surface. The phosphor coating is formed by applying, to the bulb inner surface, and by drying the slurry of the three-wavelength phosphor mixed for higher fluidity with at least two kinds of polymer dispersants from a carboxylic acid type fatty acid salt, a carboxylic acid type sulfate salt, a carboxylic acid type alkylamine salt and a carboxylic acid type quaternary ammonium salt. COPYRIGHT : (C)2006, JPO&NCIPI