Pigment coated phosphor and high contrast color television cathode ray tube using same
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United States of America Patent
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-
Dec 22, 1981
Issued Date -
N/A
app pub date -
Jun 19, 1979
filing date -
Feb 3, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Pigment coated phosphors comprising a europium activated yttrium oxysulfide phosphor having a europium activator value within a range of 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered thereto red colored pigment particles such as cadmium sulfoselenide pigment particles, rouge pigment particles or red lead pigment particles, in respective amounts of 0.1 to 2.0 wt %, 0.05 to 2.0 wt % or 0.1 to 12 wt %, based upon the europium activated yttrium oxysulfide phosphor; and a cathode ray tube for high contrast color television using as a red emitting phosphor at least one of the three pigment coated phosphors.
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