Discharge tube firing device

Details Discharge tube firing device Discharge tube firing device

1981-08-28

1984-04-10

Dixon, Harold

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

Discharge device and/or rectifier in the cathode or heater...

315207, 315241R, 315244, 315290, H05B 3900, H05B 3700

Patent

active

044423802

ABSTRACT:
The disclosed firing device comprises a fluorescent lamp serially connected to an inductive stabilizer, a first semiconductor switch including an SCR connected across the fluorescent lamp, and a nonlinear dielectric element serially connected to a parallel combination of a PNPN switch as a second semiconductor switch and a discharging circuit across the fluorescent lamp. The discharging circuit may comprise a resistor alone. The first semiconductor switch may include a semiconductor diode and a PNPN switch and the discharging circuit may include a resistor connected across series combination of a semiconductor diode. Alternatively, the discharging circuit may include a Zener diode and a resistor serially interconnected.

REFERENCES:
patent: 3878429 (1975-04-01), Iwata
patent: 4165475 (1979-08-01), Pegg et al.
patent: 4275335 (1981-06-01), Ishida
patent: 4347462 (1982-08-01), Adachi
patent: 4360762 (1982-11-01), Yamamoto

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