Lighting control system

Details Lighting control system Lighting control system

1988-03-14

1990-08-14

Mis, David

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Plural load device regulation

315156, 315307, 315308, 315310, 315311, 315DIG4, H05B 3702

Patent

active

049490206

ABSTRACT:
A lighting control circuit is provided for controlling illumination and dimming of at least one light in a lighting circuit for operation at a selectable one of a plurality of applied voltages. The lighting control circuit includes a power supply circuit for receiving an AC line voltage input and for converting the AC line voltage to selectable rectified AC and DC power for delivery to the lighting control circuit. A timing generator circuit is also coupled with the power supply circuit and is responsive to a rectified AC sample from the power supply for generating and shaping an electrical timing signal. A timing comparator circuit is responsive to the electrical timing signal for generating a variable duty cycle output signal. A switching control circuit is coupled with the lighting circuit for gating current therethrough in accordance with the variable duty cycle output control signal.

REFERENCES:
patent: 3990000 (1976-11-01), Digneffe

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