Patent ID: 7112925

Claim:
A vehicle headlamp system including a headlamp and configured to control illumination of lamp units in accordance with a driving condition, the headlamp comprising lamp units housed in a lamp chamber defined by a lamp body, and a front lens, and to emit a beam ahead of said vehicle in a light distribution pattern, the system comprising: a dimming unit that controls said illumination by adjusting an amount of power fed to a light source of at least one of the lamp units to adjust the quantity of light radiated from said lamp unit, wherein said dimming unit gradually decreases an effective value of a light source applied voltage to extinguish said lamp unit, and sets said effective value of said light source applied voltage to zero in one stroke when said effective value of said applied voltage has decreased to a threshold value, and wherein said dimming control decreases said effective value of the voltage applied to said light source to the threshold value over a predetermined period of time.