Illumination system comprising a radiation source and a...

Details Illumination system comprising a radiation source and a... Illumination system comprising a radiation source and a...

2010-12-09

2011-10-18

Koslow, Carol M (Department: 1734)

Compositions

Inorganic luminescent compositions

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

Reexamination Certificate

active

08038905

ABSTRACT:
The invention concerns an illumination system for generation of colored, especially amber or red light, comprising a radiation source and a fluorescent material comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is a amber to red emitting a rare earth metal-activated oxonitridoalumosilicate of general formula (Ca1−x−y−zSrxBayMgz)1−n(Al1−a+bBa)Si1−bN3−bOb:Ren, wherein 0≦x≦1, 0≦y≦1, 0≦z≦1, 0≦a≦1, 0<b≦1 and 0.002≦n≦0.2 and RE is selected from europium(II) and cerium(III).

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K. Uheda et al, “The Crystal Structure and Photoluminescence Properties of a New Red Phosphor, Calcium, Aluminum Silicon Nitride Doped With Divalent Europium”, ABS. 2073, 206th Meeting, 2004 The Electrochemical Society, Inc. 1 Page.

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