Electronic ballast circuit for discharge lamp

Details Electronic ballast circuit for discharge lamp Electronic ballast circuit for discharge lamp

1988-12-27

1990-08-28

Pascal, Robert J.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Plural discharge devices and/or rectifiers in the supply...

315362, H05B 3700

Patent

active

049528440

ABSTRACT:
An electronic capacitive ballast circuit for operating a DC discharge lamp, such as a negative glow lamp. The circuit includes a rectifier bridge intercoupling a ballast capacitor and the electrodes of the discharge lamp. The rectifier bridge is separated into two halves allowing the discharge current to flow to opposite ends of the filament of the lamp during alternating half-cycles so that the filament (i.e., cathode) is operated in a double hot spot regime. As a result, lamp maintenance and performance are improved.

REFERENCES:
patent: 2356369 (1941-12-01), Abernathy
patent: 3787751 (1974-01-01), Farrow
patent: 4122374 (1978-10-01), Studli
patent: 4172981 (1979-10-01), Smith
patent: 4288725 (1981-09-01), Morton
patent: 4500812 (1985-02-01), Roche
patent: 4518897 (1985-05-01), Proud et al.
Kaneda et al., "Study of High Output Circuits for Preheat Type Fluorescent Lamps", New Nippon Electric Technical Review, vol. 3, No. 1 (1968), pp. 26-36.
Capacitor Ballast for a Compact Fluorescent Lamp--Yoshio Watanabe--J. Light & Vis. Env. vol. 7, No. 1 1983 (pp. 7-14).
Single-Ended Compact Fluorescent Lamp with Multi-Arc Caused by Anode Oscillations--Watanabe et al--Journal of IES/Jul. 1982 (pp. 216-222).

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