High-pressure discharge lamp

H - Electricity – 01 – J

Patent

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Details

H01J 61/00 (2006.01)

Patent

CA 2566035

The invention relates to a high-pressure discharge lamp for vehicle headlights having a power consumption of less than 100 watt. Said high-pressure discharge lamp comprises a quartz glass discharge recipient (10) having two opposing ends (101, 102) which are sealed by molybdenum films (103, 104). Two electrodes (11, 12) which are respectively connected to one of the molybdenum films (103, 104), and an ionisable filler containing xenon and a halogenide of sodium and scandium, are arranged in the inner region (106) of the discharge recipient (10), for producing a gas discharge. According to the invention, the minimum distance (A) between the respective molybdenum film (103, 104) and the end of the electrode (11, 12) which is connected thereto and protrudes into the inner region (106) of the discharge recipient (10) is more than 5 mm.

La présente invention concerne une lampe à décharge haute pression destinée à un projecteur de véhicule, absorbant une puissance de moins de 100 watt. Selon l'invention, la lampe à décharge haute pression comprend un récipient de décharge (10) en verre de quartz, qui présente deux extrémités (101, 102) opposées, isolées par des films de molybdène (103, 104), et l'espace intérieur (106) du récipient de décharge (10), comprend deux électrodes (11, 12) qui sont reliées respectivement à l'un des films de molybdène (103, 104), et une matière de remplissage ionisable qui contient du xénon et de l'halogénure de sodium et de scandium, pour produire une décharge de gaz. Selon l'invention, la distance minimale (A) qui sépare le film de molybdène respectif (103, 104) de l'extrémité de l'électrode (11, 12) à laquelle il est relié, qui dépasse dans l'espace interne (106) du récipient de décharge (10), vaut plus de 5 mm.

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