Lamp containing long decay phosphor

Details Lamp containing long decay phosphor Lamp containing long decay phosphor

1996-05-10

1999-01-12

O'Shea, Sandra

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313487, 313635, H01J 162, H01J 6304, H01J 1716, H01J 6135

Patent

active

058594965

ABSTRACT:
An afterglow lamp has a light emitting section for converting electric energy to optical energy. A fluorescent layer is excited to emit-light by the light emitting section and is represented by the general formula (M.sub.1-p-q, Eu.sub.p Q.sub.q)O.multidot.n(Al.sub.1-m B.sub.m).sub.2 O.sub.3 .multidot.kP .sub.2 O.sub.5 .multidot..alpha.X. The values of p, q, n, m, k, .alpha. and .alpha.
are in the ranges 0.0001.ltoreq.p.ltoreq.0.5, 0.0001.ltoreq.q.ltoreq.0.5, 0.5.ltoreq.n.ltoreq.3.0, O.ltoreq.m.ltoreq.0.5, O.ltoreq.k.ltoreq.0.2, O.ltoreq..alpha..ltoreq.0.5, and O.ltoreq..alpha.
.ltoreq.0.4. M is at least one selected from a group of divalent metals including Mg; Q is a coactivator and at least one selected from a group including Mn, Zr, Nb, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; and X is at least one selected from halogen elements.

REFERENCES:
patent: 4353808 (1982-10-01), Tanimizu et al.
patent: 4487533 (1984-12-01), Hoffman
patent: 5376303 (1994-12-01), Royce et al.
patent: 5424006 (1995-06-01), Murayama et al.
Database WPI, Section Ch, Week 9651, Derwent Publications Ltd., London, GB; Class L03, AN 96-515273, XP002027137 & JP 08 269 448 A (Nichia Kagaku Kogyo KK) 15 Oct. 1996 *abstract*.
Patent Abstracts of Japan, vol. 00, No. 0 & JP 08 073845 A (Nichia Chem Ind. Ltd) *abstract* *p. 2*.
Patent Abstracts of Japan, vol. 013, No. 313 (C-618), 17 Jul. 1989 & JP 01 096283 A (Toshiba Corp), 14 Apr. 1989, *abstract*.

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