Solid-state fluorescent lamp ballast

Details Solid-state fluorescent lamp ballast Solid-state fluorescent lamp ballast

1981-05-26

1983-06-14

Dixon, Harold A.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

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

315209, 315226, 315DIG4, H05B 3700

Patent

active

043885632

ABSTRACT:
An improved solid-state fluorescent lamp ballast circuit in which rectified line voltage is chopped, utilizing high power field effect transistors, to provide a high frequency input to a fluorescent lamp, thus permitting smaller reactive components to be utilized. Also shown is circuitry whereby the duty cycle of the chopping switches may be modulated to permit dimming of the lamp, which may be remotely located.

REFERENCES:
patent: 3155875 (1964-11-01), Wenrich et al.
patent: 3525883 (1970-08-01), Iordanidis
patent: 3753071 (1973-08-01), Engel et al.
patent: 3789266 (1974-01-01), Polman
patent: 4004188 (1977-01-01), Cooper
patent: 4039862 (1977-08-01), Dingwall et al.
patent: 4075476 (1978-02-01), Pitel
patent: 4127798 (1978-11-01), Anderson
patent: 4170747 (1979-10-01), Holmes
patent: 4276496 (1981-06-01), Arena-Ochoa
patent: 4277728 (1981-07-01), Stevens
patent: 4323799 (1982-04-01), King et al.

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