High-pressure discharge lamp e.g. vehicle headlight, lighting apparatus, has control and power circuit boards separately installed within metal casing, and circuit units and circuit parts disposed one on top of other

摘要

The apparatus has an inverter circuit (3) generating AC voltage to be supplied to a discharge lamp (4). A lighting control circuit (6) controls the inverter and starter circuits for lighting up the lamp. Control and power circuit boards are separately installed within a metal casing. Circuit units constituting the control circuit and circuit parts constituting the starter circuit are disposed one on top of the other.