Color picture tube

In a color picture tube having a phosphor screen with three kinds, i.e., red, blue and green phosphor dots or phosphor strips, the red phosphor dots or strips are formed by employing europium-activated yttrium oxide (Y2O3:Eu) phosphor powder, each particle of which powder is coated with thin layer o...

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Bibliographic Details
Main Author ASHIZAKI; SHIGEYA
Format Patent
LanguageEnglish
Published 02.11.1976
Subjects
ADHESIVES
BASIC ELECTRIC ELEMENTS
CHEMISTRY
DYES
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
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Summary:In a color picture tube having a phosphor screen with three kinds, i.e., red, blue and green phosphor dots or phosphor strips, the red phosphor dots or strips are formed by employing europium-activated yttrium oxide (Y2O3:Eu) phosphor powder, each particle of which powder is coated with thin layer of europium-activated oxysulfide (Y2O2S:Eu) phosphor. By means of such thin coating of the oxysulfide phosphor, the conventional adverse active characteristic of Y2O3:Eu against photo-hardening agent in the phosphor slurry used in forming phosphor screen is eliminated, thereby increasing the uniformity of the red light emission and decreasing the U-V light exposure time in the screen forming process.
Bibliography:Application Number: US19750562056