CATHODE RAY TUBE

PURPOSE:A cathode ray tube provided with a phosphor prevented from emitting foreign color due to contamination without causing non-uniformity or deviation of color tone, which is obtd. by doping a blue light-emitting phosphor for a cathode ray tube with Co so as to form a film of a thickness not lar...

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Bibliographische Detailangaben
Hauptverfasser:	TSUKAGOSHI HATSUO, ITO TAKEO, KAWAMATA TAKAMITSU, KOIKE NORIO
Format:	Patent
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	PURPOSE:A cathode ray tube provided with a phosphor prevented from emitting foreign color due to contamination without causing non-uniformity or deviation of color tone, which is obtd. by doping a blue light-emitting phosphor for a cathode ray tube with Co so as to form a film of a thickness not larger than a specified value. CONSTITUTION:A blue light-emitting phosphor for a cathode ray tube selected from among ZnS phosphor activated with silver, silver and Al, or chlorine and emitting light by cathode ray excitation, is doped with 0.1-20ppm Co at a baking temp. of 550-750 deg.C to obtain a cathode ray tube provided with a phosphor of a film thickness