Dielectric barrier discharge lamp comprising an UV-B phosphor

Details Dielectric barrier discharge lamp comprising an UV-B phosphor Dielectric barrier discharge lamp comprising an UV-B phosphor

2005-04-19

2010-12-21

Patel, Nimeshkumar D (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

C445S023000

Reexamination Certificate

active

07855497

ABSTRACT:
A dielectric barrier Xe discharge lamp include discharge vessel with a gas filling containing Xe or a Xe/Ne mixture and a luminescent layer of a UV-B phosphor emitting in the UV-B range 280 to 320 nm. The luminescent layer includes a Gd3+activated phosphor according to at least one the formulas of (Y1-x-yGdxSy)Al3(BO3)4, (La1-x-yGdxSy)Al3(BO3)4, (La1-x-yGdxSy)B3O6, (Y1-x-y-zGdxSyLuz)PO4, (Y1-x-y-zGdxSyLuz)BO3, (Y1-x-y-zGdxSyLuz)3Al5O12, Me(Y1-x-yGdxSy)F4(Me=Li, Na, K; S═Bi, Nd, Pr; 0.0<x,z≦1.0; 0.0<y≦0.1) or a mixture thereof. The luminescent layer may be sensitized by Bi3+, Pr3+or Nd3+.

REFERENCES:
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Heinrich Von Busch et al., A Short History (1999-2202) of the Project “Dielectric Barrier Discharges” from General Lighting to Water Treatment. Download from the Philips Repweb.

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