JPS5919412B

JPS5919412B

A fluorescent lamp having excellent color rendering property and high luminous efficiency comprises a fluorescent layer coated on an inner surface of a discharge tube. The fluorescent layer mainly comprises a first fluorescent material having-emission peak in a range of wavelength of 480 to 490 nm w...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MURAKAMI KATSUO, ANZAI YOSHINORI, OOTANI MITSUOKI, ITO HIROSHI
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:A fluorescent lamp having excellent color rendering property and high luminous efficiency comprises a fluorescent layer coated on an inner surface of a discharge tube. The fluorescent layer mainly comprises a first fluorescent material having-emission peak in a range of wavelength of 480 to 490 nm which is an alkaline earth metal boron phosphate activated by a divalent europium compound having the formula m(Sr1-x-y-pBaxCayEupO)x(1-n)P2O5xnB2O3 wherein the parameters x, y, p, m and n are in ranges of 0