Fluorescent substance and light-emitting device using the same

Details Fluorescent substance and light-emitting device using the same Fluorescent substance and light-emitting device using the same

2008-01-31

2009-10-13

Koslow, C. Melissa (Department: 1793)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C428S404000, C428S403000, C428S405000, C428S406000, C428S407000, C257S098000, C313S503000

Reexamination Certificate

active

07601277

ABSTRACT:
Disclosed is a fluorescent substance comprising an alkaline earth ortho-silicate, the fluorescent substance being activated by Eu2+, and further comprising at least one selected from the group consisting of La, Gd, Cs and K.

REFERENCES:
patent: 6621211 (2003-09-01), Srivastava et al.
patent: 7468147 (2008-12-01), Shida et al.
patent: 2006/0011936 (2006-01-01), Hiramatsu et al.
patent: 2003-142004 (2003-05-01), None
patent: 2005/027231 (2005-03-01), None
patent: 2006/043682 (2006-04-01), None
International Search Report for PCT/JP2005/019441 dated Feb. 8, 2006.
Written Opinion of the International Search Report for PCT/JP2005/019441 dated Feb. 8, 2006.
S.H.M. Poort, et al., Optical Properties of Eu 2+−Activated Orthosilicates and Orthophosphates, Journal of Alloys and Compunds, 260 (1997) 93-97.
G. Blass, et al., Fluorescence of Eu2+−Activated Silicates, Philips Res. Repts 23, 189-200, 1968.
Derwent Abstract for KR 2004088446 A, Oct. 16, 2004.
Derwent Abstract for KR 2003060697 A, Jul. 16, 2003.

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