High voltage discharge lamp apparatus for vehicles

摘要

A discharge lamp apparatus is provided having a DC power source (1) and a high voltage discharge lamp (2) comprising:
a DC-DC converter comprising a transformer (41) for boosting a voltage supplied from the DC power source, a switching element (42) connected to a primary winding (41a) of the transformer in series, and a capacitor (45) connected in parallel with the transformer connected in series with the switching element, for generating the boosted voltage;
a starter circuit (7) having a thyristor (76) for turning on the thyristor when the high voltage discharge lamp is started to light and for applying a high voltage pulse to the high voltage discharge lamp based on the boosted voltage generated from the DC-DC converter; and
a gate circuit (11) for generating the gate signal to turn on the thyristor,
wherein the switching element and the gate circuit are both formed on a hybrid IC board (100),
the negative electrode side terminal of the capacitor is connected to a first wiring member (24) and then connected to the hybrid IC board by way of the first terminal (12c),
wherein the cathode terminal of the thyristor is connected to a second wiring member (24) and then connected to the hybrid IC board by way of the second terminal (12m) different from the first terminal, and
wherein the first terminal and the second terminal are electrically connected on the hybrid IC board.