Rare gas discharge fluorescent lamp device

Details Rare gas discharge fluorescent lamp device Rare gas discharge fluorescent lamp device

1991-06-05

1992-12-22

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315205, 315207, 315241R, 315241S, 315291, 315313, 315DIG7, H05B 3702

Patent

active

051736420

ABSTRACT:
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 fluroescent 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.

REFERENCES:
patent: 2622221 (1952-12-01), Beese
patent: 3467887 (1969-09-01), Skirvin
patent: 3745411 (1973-07-01), Polman et al.
patent: 4882520 (1989-11-01), Tsunekawa et al.
patent: 4914347 (1990-04-01), Osawa et al.
patent: 5034661 (1991-07-01), Sakurai et al.
patent: 5072155 (1991-12-01), Sakurai et al.

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