| 摘要 |
An arc tube comprises a light transmissive body containing an arc generating and sustaining medium and has a press seal formed at one end of said body. The press seal comprises a planar portion separating opposed edges. A first foil is sealed in the planar portion. A lead-in conductor is attached to the foil and extends outside of the body and an electrode is also attached to the foil and extends inside the body. A first cavity is formed on a first of the edges and a second cavity is formed on a second of the edges. A fill is provided in each of the cavities for supporting emission of ultraviolet radiation; and a second foil sealed in the planar portion is attached to the first foil, said second foil having a first end terminating in the first cavity and a second end terminating in the second cavity. A ground plane is provided adjacent the cavities. A high voltage pulse applied to the electrodes, and, thus, the foils, creates a capacitive discharge creating the ultraviolet radiation which aids in starting the lamp in which the arc tube is employed. <IMAGE> |
