| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device performing a stable high-frequency operation. SOLUTION: Resonant means (Lr, Cd) connecting a discharge tube and a capacitor (Cf) generating voltage synchronized with current flowing to the resonant means are connected in series at a connecting point (S) of a first and a second semiconductor switching elements connected in series complementarily, and the capacitor (Cf) voltage is impressed to a controlling terminal of the first and the second semiconductor switching elements through a phase shift means (Lg) shifting a phase corresponding with a frequency change of the resonant means. Here, a capacitance value of the capacitor (Cf) is made greater than 0.15μF. |
