| 摘要 |
PURPOSE:To contrive to prevent a driver from forgetting to dip to an opposing air and to light in a tunnel by a method wherein vehicular speeds and illumination at the vehicular front are detected and voltages supplied to head lamps are automatically controlled based upon the voltage value from a speed-voltage transducer and an illumination-voltage transducer. CONSTITUTION:A speed-voltage transducer 2 converts a detection signal from a speed detector 1, which detects the vehicular speed, into a voltage in proportion to the vehicular speed, while an illumination-voltage transducer 4 converts a detection signal from an illumination detector 3, which detects the illumination at vehicular front, into a voltage in proportion to the illumination. A power source 6 is for the head lamp 5 and an automatic voltage regulator 7 regulates the voltage supplied to the head lamp 5 based upon the voltage signals from the speed-voltage trasnducer 2 and illumination-voltage transducer 4. When the vehicular speed is low and the illumination at the vehicular front is high, the light intensity of the head lamp is controlled to be lowered. |
