Rare gas discharge fluorescent lamp device

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

H - Electricity

05

B

315/28, 315/67

H05B 41/16 (2006.01) G03G 15/04 (2006.01) H01J 61/76 (2006.01) H05B 41/282 (2006.01) H05B 41/392 (2006.01)

Patent

CA 2017129

- 63 - ABSTRACT OF THE DISCLOSURE The invention provides a rare gas discharge fluorescent lamp device which is long in life and high in brightness and efficiency. The lamp device comprises a rare gas discharge fluorescent lamp including a glass bulb having xenon, argon or krypton gas enclosed therein, a fluorescent layer formed on an inner face of the bulb, and a pair of electrodes located at the opposite ends of the bulb. A pulse-like voltage wherein the ratio of an energization period with respect to one cycle is higher than 5 % but lower than 70 % (xenon or krypton gas) or 80 % (argon gas) and the energization period is shorter than 150 µsec is applied between the electrodes of the lamp. Such pulse-like voltage is produced from a circuit including a dc power source. a pulse signal source, and a switching element for controlling application of a voltage of the dc power source or such voltage boosted by a boosting transformer or a resonance circuit. Where the negative electrode includes a filament coil, a rectifying element is connected between the electrodes of the lamp for allowing pre-heating of the filament coil.

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