Patent ID: 7301284

Claim:
A lighting control circuit for vehicle lighting equipment, comprising: current supplying means for controlling a supply of current to a semiconductor light source based on an on/off control signal, while using an input voltage from a power supply as a luminous energy of the semiconductor light source; and signal converting means for converting a binary signal into the on/off control signal having a designated duty ratio in response to one signal of the binary signal, and outputting the on/off control signal to the current supplying means, wherein the current supplying means supplies a specified current to the semiconductor light source when the on/off control signal is at one logical level, and stops the supply of current to the semiconductor light source when the on/off control signal is at other logical level, and current supplying means comprises a voltage converter circuit which repeats the supplying the specified current and the stopping the current in response to a duty ratio of the on/off control signal being output from the signal converting means.