A RARE GAS DISCHARGE FLUORESCENT LAMP DEVICE

摘要

The present invention provides a rare gas discharge fluorescent lamp device which is long in life and high in brightness and efficiency. The lamp device basically comprises a rare gas discharge fluorescent lamp wherein rare gas is enclosed in the inside of a glass bulb which has a fluorescent layer formed on an inner face thereof and has a pair of electrodes at the opposite ends thereof. In one embodiment, it further comprises a dc power source and a resonance circuit for generating pulse-like voltage across the pair of electrodes having the time rate of energization time to a period higher than 5 % but lower than 70 % and the energization time within a period shorter than 150 mu sec, and in another embodiment, it further comprises a high-frequency ac power source and an electric voltage generating means to generate pulse-like voltage across a pair of electrodes of the lamp wherein an energization time of the pulse-like voltage is equal to a half period of a wave form applied from ac power source and the idle time integral-number times as long as the half period of the wave form applied from the ac power source.