Entladungslampen- Einrichtung mit direkt gekoppelter Entladungslampe und mit Vorschaltgerät

摘要

In a discharge lamp apparatus, a casing (41) of an electronic controller unit (40) for a discharge lamp (30) is comprised of a resin casing (42) and a metal casing (44) and accommodates therein circuit components for generating a voltage supplied to the discharge lamp (30). The resin casing (42) couples with and contacts with the connector part (31) of the discharge lamp (30). A power MOS transistor (72) is attached to the metal casing (44) through a plate member (75) made of an insulating material. With this arrangement, heat generated by the discharge lamp (30) is less likely to transfer from the resin casing (42) to the metal casing (44), and heat generated by the power MOS transistor (72) is efficiently radiated from the metal casing (44) to the outside.