Patent ID: 7919925

Claim:
A lighting control device of a lighting device for a vehicle comprising: a switching regulator for supplying a current to a plurality of semiconductor light sources connected in parallel with each other; a series regulator connected in series with the semiconductor light sources; switching regulator control device for controlling an output voltage of the switching regulator; ON/OFF control device connected to the series regulator and serving to control ON/OFF operations of the semiconductor light sources based on communication information transferred from outside and to calculate a specified current value output from the switching regulator based on the ON/OFF operations; and current detecting device provided between an output of the switching regulator and a series circuit of the series regulator or the semiconductor light source and serving to detect a current output from the switching regulator, wherein the ON/OFF control device compares a detected current value which is detected by the current detecting device with the specified current value and stops an operation of the switching regulator when the detected current value is greater than the specified current value.