Koninklijke Philips Corporation N.v.

Michiel Van Der Meer

Olaf Mastenbroek

Jacques Maria Jozef Geboers

Daiyu Hayashi

Robert Bak

A dielectric barrier discharge, DBD, lamp device comprises a toroid shaped discharge chamber () having a discharge chamber wall (). The discharge chamber wall comprises a tubular inner wall section (), a tubular outer wall section (), and two ring-shaped end wall sections (). Each of the end wall sections extend between an end of the outer wall section and an end of the inner wall section. A high voltage electrode () is provided at an outer surface of the outer wall section of the discharge chamber wall. A low voltage electrode comprises an electrically conducting fluid surrounded by the inner wall section of the discharge chamber wall. The DBD lamp device may be part of an optical fluid treatment device.

Dielectric barrier discharge lamp device, and optical fluid treatment device provided with the dielectric barrier discharge lamp device

The present invention relates to a fluorescent lamp including a visible radiation and/or UV-radiation transmissive discharge vessel, at least one luminescent layer coated onto the inner wall of the discharge vessel for converting UV-radiation to other wavelengths of UV-A, UV-B and/or visible radiation characterized in, that at a section to which no luminescent layer is applied on the inner surface area of said discharge vessel at least one substrate layer is applied on the outer surface of this area of said discharge vessel, and/or at least a section to which luminescent layer is applied on the inner surface area of said discharge vessel at least one substrate layer is applied on the outer surface of this area of said discharge vessel; whereby said substrate layer comprises at least one volatile organic material being releasable over an extended time period, whereby the volatile organic material is released by UV-radiation and/or thermal heat generated from said fluorescent lamp and, whereby at operation the temperature of the outer surface of the discharge vessel of said fluorescent lamp is &#x2266;70&#xb0; C.

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Wouw, Netherlands

Michiel Van Der Meer