Patent ID: 7196473
Filing Date: 2007-03-27
Classification: H01J

Abstract:
1. A dielectric barrier discharge lamp, comprising a discharge vessel, the discharge vessel enclosing a discharge volume filled with discharge gas, the discharge vessel further comprising a phosphor layer within the discharge volume, further the discharge vessel comprising an outer tubular portion having an internal surface, an inner tubular portion having an outward surface, the outer tubular portion surrounding the inner tubular portion, so that a substantially annular discharge volume is enclosed between the internal surface of the outer tubular portion and the outward surface of the inner tubular portion, further the inner tubular portion comprising a multitude of axially extending protrusions around its circumference, the protrusions extending into the substantially annular discharge volume, a first set of interconnected electrodes and a second set of interconnected electrodes, the first set and second set of electrodes being isolated from the discharge volume by at least one dielectric layer, at least one of the dielectric layers being constituted by the wall of the inner tubular portion.