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AssigneeKoninklijke Philips Electronics N.V.
InventorsHubertus Cornelis Maria Van Den Nieuwenhuizen, Johannes Martinus De Regt
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A short-arc discharge lamp (1) in accordance with the invention is provided with a light-transmitting, gastight lamp vessel (10), which is provided with an ionizable filling. A first electrode and a second electrode (11a, 11b), respectively, are arranged in the lamp vessel (10) and are each connected to a current conductor of their own (12a, 12b), respectively, which issues from the lamp vessel to the exterior. An ignition antenna (2) is arranged near the lamp vessel, which ignition antenna is connected to a further current conductor (24). The ignition antenna comprises an antenna vessel (20) and a further outer electrode (22), which antenna vessel (20) is closed in a gastight manner and provided with an ionizable filling, the further outer electrode (22) being connected to the further current conductor (24). According to the invention, the antenna encloses an electroconductive element. In this way, very small ignition delays are guaranteed, even if the lamp has been in a dark environment for some time.
A unit comprising a high-pressure discharge lamp (1) and an ignition antenna (2), which high-pressure discharge lamp is provided with a light-transmitting, gastight lamp vessel (10) containing an ionizable filling, in which lamp vessel a first and a second electrode (11a, 11b) are arranged, and each one of the electrodes is connected to a current conductor (12a, 12b) of its own, which issues from the lamp vessel to the exterior, which ignition antenna (2), which is arranged near the lamp vessel, is provided with a gastight antenna vessel (20) which contains an ionizable filling and which is provided with a further outer electrode (22), which is provided on an outside surface of the antenna vessel (120) and connected to a further current supply conductor (24), characterized in that the antenna vessel of the ignition antenna also encloses an electroconductive element.
Dependencies are inferred from the claim text.