| 摘要 |
PURPOSE:To ensure relighting at the flashing of a power source switch or the momentary stop of a power source. CONSTITUTION:When a power source switch 2 is inputted as a change-over switch 24 which is a switching means remains ON, a timer circuit having a transistor 15 as the switch is operated. In this case, this operating time T1 and the operating time T2 by a transistor 19 are set to be T1<T2. Therefore, the capacitor as the base of a transistor 7 is laid again into the state of a capacitor 12 alone from the state of the capacitor 12 alone through the parallel state of 12, 13. Thus, a discharge lamp 25 reaches dimming lighting from preheating through full lighting. |
