DISCHARGE LAMP LIGHTING DEVICE, AUTOMOTIVE HIGH-INTENSITY DISCHARGE LAMP LIGHTING DEVICE, AUTOMOTIVE HEADLIGHT DEVICE, AND CAR

摘要

According to the present invention, a discharge lamp lighting device includes a controller performing an abnormality determination process based on the measured voltage value defined by AC voltage applied to a discharge lamp. The controller determines whether a driving voltage is in asymmetric state or not in a predetermined period. The controller determines the generation of abnormality if an asymmetric state is generated in the predetermined period.;COPYRIGHT KIPO 2014;[Reference numerals] (5) Power voltage detector;(6) Temperature detector;(7a) Power target saving part;(7b) Maximum power limit part;(7c) Current target computation part;(7e) Driver controller;(8,9) Driver