Patent ID: 7352135
Filing Date: 2008-04-01
Classification: H05B

Abstract:
1. A lighting controller for a lighting device for a vehicle comprising: a current supply control unit for receiving a supply of an electric power from a power source and controlling a supply of a current to a semiconductor light source; a current detecting unit for detecting the current of the semiconductor light source; a resistance element that consumes the current when the semiconductor light source is turned on; a switch unit for forming a turning on circuit including the resistance element in a current supply path for connecting the current supply control unit to the semiconductor light source during an off operation and forming a bypass circuit for bypassing the resistance element in the current supply path during an on operation; and a switch control unit for deciding whether or not the detected current of the current detecting unit is a current showing a transient state, wherein the switch control unit turns off the switch unit when an affirmative decided result is obtained and turns on the switch unit when a negative decided result is obtained.