WHITE LIGHT EMITTING SCREEN FOR PROJECTION TUBE AND PRODUCTION THEREOF

PURPOSE:To obtain a white light emitting screen which little causes lowering in luminescent efficiency even at a high temp. and in which saturation current is small, by forming a sedimentation film of a Tb-activated lanthanum oxychloride phosphor and a Eu-activated yttrium oxide phosphor on the inne...

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Bibliographic Details
Main Authors AJIRO SAKAE, NAGAI HITOSHI, TSUDA NOBUYUKI, HATSUTORI HIRONOBU
Format Patent
LanguageEnglish
Published 08.11.1985
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:PURPOSE:To obtain a white light emitting screen which little causes lowering in luminescent efficiency even at a high temp. and in which saturation current is small, by forming a sedimentation film of a Tb-activated lanthanum oxychloride phosphor and a Eu-activated yttrium oxide phosphor on the inner surface of the face of a cathode ray tube. CONSTITUTION:A sedimentation film of a phosphor mixture of a terbium-activated lanthanum oxychloride phosphor contg. terbium at a concn. of 0.4-0.7wt% and a europium-activated yttrium oxide phosphor in a mixing ratio of 10:1-15:1 by weight is formed on the inner surface of the face of a cathode ray tube by using a esdimentation soln. contg. water glass and barium sulfate in a weight ratio of water glass to barium sulfate of 20-40. In this way, A white light emitting luminescent screen formed from the terbium-activated lanthanum oxychloride phosphor contg. terbium at a concn. of 0.4-0.7wt% and the europium-activated yttrium oxide phosphor in a mixing ratio of 10:1-15:1 by weight can be obtd.
Bibliography:Application Number: JP19840080210