| 摘要 |
PURPOSE:To obtain a fluorescent lamp with high efficiency and high intensity by providing a serial circuit with a resonance circuit and a pulse signal source applying the specific pulse signal to a switching element. CONSTITUTION:A serial circuit constituted of a DC power source 12 and a resonance circuit 13 is connected between both electrodes 3a and 3b of a rare gas discharge fluorescent lamp 10, and a switching element 17 is connected between both electrodes 3a and 3b respectively. During the opened period by the pulse signal from a pulse signal source 18, the voltage applied across both electrodes 3a and 3b by the opening of the switching element 17 is boosted to the nearly sinusoidal AC half-wave voltage required for the rising lamp lighting by the resonance circuit 13, and the fluorescent lamp 10 is discharged. The discharge period is set to 150musec or below at the rate of 5-70% in one cycle for the xenon gas or krypton gas-sealed fluorescent lamp 10. The high- intensity and high-efficiency fluorescent lamp 10 is obtained by the nearly sinusoidal AC half-wave pulse-shaped discharging. |
