Fluorescent lamp controlling

Details Fluorescent lamp controlling Fluorescent lamp controlling

1987-10-13

1989-08-01

Moore, David K.

Electric lamp and discharge devices: systems

With cathode or cathode heater supply circuit

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

315DIG4, 315DIG7, 315291, 315209R, H05B 4136

Patent

active

048535982

ABSTRACT:
An apparatus for energizing a fluorescent lamp having two filament electrodes. The apparatus comprises a rectifier circuit responsive to an AC voltage for providing DC voltage and a transformer having at least a primary winding and a secondary winding for providing transformed power to said lamp. A switch intermittently connects said DC voltage to said primary winding to develop current pulses at an ultrasonic frequency. Said secondary winding is coupled to said filament electrodes to both heat said filament electrodes and establish a potential thereacross for initiating and maintaining an arc therebetween.

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patent: 4370600 (1983-01-01), Zansky
patent: 4392086 (1983-07-01), Ide et al.
patent: 4392087 (1983-07-01), Zansky
patent: 4441054 (1984-04-01), Bay
patent: 4463286 (1984-07-01), Justice
patent: 4492899 (1985-01-01), Martin
patent: 4513364 (1985-04-01), Nilssen
patent: 4588924 (1986-05-01), Luursema et al.
patent: 4663570 (1987-05-01), Luchaco et al.
patent: 4682080 (1987-07-01), Ogawa et al.
patent: 4686427 (1987-08-01), Burke

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