PHOSPHOR AND FLUORESCENT LIGHT-EMITTING TUBE

PROBLEM TO BE SOLVED: To provide a fluorescent display tube in which life span of SrTiO3:Pr phosphor used in an anode luminous part of the tube is prolonged to practically sufficient degree. SOLUTION: WO3powder is added to and mixed with an SrTiO3:Pr phosphor and the mixture is used for the luminous...

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Bibliographische Detailangaben
Hauptverfasser:	TOKI HITOSHI, YAMADA TOMOHIRO, KATO MASAHIRO, MORI TATATOMI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES BASIC ELECTRIC ELEMENTS CHEMISTRY DYES ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a fluorescent display tube in which life span of SrTiO3:Pr phosphor used in an anode luminous part of the tube is prolonged to practically sufficient degree. SOLUTION: WO3powder is added to and mixed with an SrTiO3:Pr phosphor and the mixture is used for the luminous part of anode of the fluorescent display tube. The amount of WO3powder added is preferably 0.1-30 wt.% expressed in terms of metal element. According to the phosphor of the present invention, residual ratio (65-95) of luminance after lighting for 1,000 hr which is not lower than values of conventional phosphors can be obtained while ensuring initial luminance (70-103) in a ratio of about ≥70% based on conventional initial luminance and practically significant improvement can be added to life span characteristics of SrTiO3:Pr phosphor. COPYRIGHT: (C)2006,JPO&NCIPI