Filter-coated phosphor
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorsTadashi Wakatsuki, Takeshi Takahara
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Abstract
Disclosed is a filter-coated phosphor having phosphor particles coated with filter particles formed of pigments of the same color as that of light emitted from the phosphor, the phosphor particles coated with the filter particles being additionally coated with a borate compound. According to this filter-coated phosphor, the filter particles never exfoliate from the surfaces of the phosphor particles in a slurry, satisfactory dispersibility is obtained in the slurry, and the slurry pH is stable. A phosphor screen of a color picture tube obtained with use of the filter-coated phosphor exhibits highly outstanding contrast and luminous efficiency.
Claims8
A filter-coated phosphor having phosphor particles coated with filter particles formed of pigments of the same color as that of light emitted from said phosphor, said phosphor particles coated with said filter particles being additionally coated with a borate compound wherein the weight of phosphor particles, and the weight of said borate compound coating is 0.001 to 0.3% of the weight of the phosphor compound.
Dependencies are inferred from the claim text.