| 摘要 |
PURPOSE:To control the illuminance of stop, tail and parking indicating functions of single valve by controlling power supply to single valve on the basis of output from pulse oscillator. CONSTITUTION:A stop switch 3 is connected through an ignition switch 2 to a car mount battery 1 while tail switch (TA switch) 4 and parking switch (PA switch) 5 are connected in parallel to a battery 1. A seat sensor 6 will close a movable contact 6a to TA contact 6b upon seating of driver while close said contact 6a to PA contact 6c upon leaving of driver under stoppage of car. Control circuit 10 for controlling power supply to single valve 12 on the basis of the indicating function will vary the pulse width of pulse oscillator to vary the duty ratio thus to perform power supply control with correspondence to the output. |
