| 摘要 |
An electronic starter for turning a fluorescent lamp (100) on instantaneously is disclosed. In the electronic starter, when AC power source voltage is positive, a trigger voltage is applied to the gate of a semiconductor switch section (10) using characteristics of a MOS-FET (Q3) through a first semiconductor switch driving section (30), facilitating flow of drain-to-source current, so as to fully preheat filaments (F1, F2) of a fluorescent lamp (100). When AC power source voltage is negative voltage, filaments (F1, F2) are fuly preheated by operating a second semiconductor switch driving section (40). Then, filaments (F1, F2) are continuously preheated, and the preheating current is cut off instantaneously, producing high voltage pulse in ballast (3), so that a fluorescent lamp (100) can be instantaneously turned on by the resultant voltage adding the high voltage pulse to power source voltage. |
