Ballasts for HID headlamp systems for automobiles

摘要

HID lamps are increasingly being utilized in automotive headlamp systems. The benefit of HID headlamp systems is increased driver visibility leading to a decrease of night-time traffic accidents. This is because HID lamps have greater light output than conventional halogen bulbs. We are well placed to investigate electronic ballasts for HID headlamp systems for automobiles since the new technology which satisfies the requirements of HID headlamp systems has already been developed by us namely, HID electronic ballasts for general lighting apparatus. In this paper, the proposed technologies relating to the square-wave inverter, the start-up control, and the hot re-strike igniter are described. The features of the developed electronic ballast for HID headlamp systems are also described.