CAR-MOUNTED HEAD LIGHT CONTROL DEVICE, CAR-MOUNTED HEAD LIGHT CONTROL SYSTEM AND CAR-MOUNTED HEAD LIGHT, AND, HIGH-BRIGHTNESS DISCHARGE LAMP CONTROL DEVICE, HIGH-BRIGHTNESS DISCHARGE LAMP CONTROL SYSTEM AND CAR-MOUNTED HEAD LIGHT

摘要

In vehicle headlamp control apparatuses 1A and 1B, which receive a direct current voltage Es, light discharge lamps La1 and La2 by square waves, and drive motors M1 and M2, in each of which the number is at least one, arithmetic operations are performed for synchronizing the square waves for lighting the discharge lamps La1 and La2 and pulses for driving the motors M1 and M2 with each other and for driving the motors M1 and M2 within a substantially constant time after polarities of the square waves for lighting the discharge lamps are inverted. By using an inexpensive microcomputer, the vehicle headlamp control apparatuses make it possible to realize lighting controls for the discharge lamps La1 and La2 and smooth drive controls for headlamps and auxiliary lamps by the motors M1and M2 for varying optical axes thereof.