| 摘要 |
PURPOSE:To apply the double voltage or above of the charging voltage of a main capacitor to a discharge light emitting tube when luminescence is started with a simple circuit structure. CONSTITUTION:A switching circuit 9 is inserted between a booster circuit 2 and a main capacitor 3, and a rectifying element 8 is inserted between the main capacitor 3 and a discharge light emitting tube 7 respectively. When the main capacitor 3 is charged to the preset voltage, the booster circuit 2 is stopped, and the switching circuit 9 is turned off. When luminescence is started, the booster circuit 2 is again driven while the switching circuit 9 is kept off, and the output of the booster circuit 2 plus the charging voltage of the main capacitor are applied to the discharge light emitting tube 7. |
