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US 5,166,456 AGranted
Luminescent phosphor composition
AssigneeKasei Optonix, Ltd.
InventorMasahiko Yoshino
Life of this patent
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Abstract
A luminescent phosphor composition composed essentially of particles formed by fusion of a phosphor and a sulfate of alkaline earth metal.
Claims4
A luminescent phosphor composition consisting essentially of particles formed by fusion of a rare earth oxide phosphor, and a sulfate of an alkaline earth metal, wherein the total content of the alkaline earth metal is within a range of from 5-95% by weight, said rare earth oxide phosphor further containing an amount of Eu effective as a phosphor activator, said phosphor having the formula:
- Ln.sub.2 O.sub.3 :Eu
- wherein Ln is at least one element selected from the group consisting of Y, Gd, La and Lu.
Dependencies are inferred from the claim text.