Dimming control circuit

Details Dimming control circuit Dimming control circuit

1989-01-06

1991-04-02

Pascal, Robert J.

Electric lamp and discharge devices: systems

Regulation of the control current and/or potential applied...

Discharge control discharge device in the control circuit

315208, 315291, 315DIG4, H05B 3702

Patent

active

050049577

ABSTRACT:
A circuit and a method for controlling the dimming of incandescent lights using a pair of antiparallel connected SCRs which are fired at the same frequency as the frequency of the AC line power to achieve phase control of the power supplied to the light. Only one SCR of the pair is utilized in the 0% to 50% brightness range while both SCRs are utilized in the 51% to 100% brightness range.

REFERENCES:
patent: 3821601 (1974-06-01), Kappenhagen
patent: 3875458 (1975-04-01), Kappenhagen
patent: 3927349 (1975-12-01), Suhren et al.
patent: 4096414 (1978-06-01), Howell
patent: 4219761 (1980-08-01), Mustoe
patent: 4523131 (1985-06-01), Zansky
patent: 4651060 (1987-03-01), Clark

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