| 摘要 |
<p>The present invention provides a lighting device of a fluorescent lamp used in a low voltage comprising a serial resonance circuit including a current transformer (CH3) and a capacitor (C5), and connected to a fluorescent lamp (LP) in order to induce a resonance voltage which is necessary for the lighting of a fluorescent lamp, an inverter circuit including LC driving trans (L2) composed of first transistor (Q1) and second transistor (Q2); first coil (T1) connected to the base of the first transistor (Q1), second coil (T2) connected to the base of the second transistor (Q2), and third coil (T3) connected to the serial resonance circuit. The present invention is characterized in that a capacitor (C4) is connected between the current transformer (CH3) of said serial resonance circuit and second coil (T2) of said driving transformer (L2), and when a low voltage is provided, a capacitor (C4) raises a parallel resonance with the current transformer (CH3) being operated, and stabilizes the lighting of a fluorescent lamp and also stabilizes the operations of transistors (Q1, Q2) of the inverter circuit.</p> |
