A dimming control circuit for a plurality of lighting fixtures includes a separate semiconductor power switch, e.g., a silicon-controlled rectifier or SCR, for providing controlled amounts of pulsed, unidirectional electrical current to each lighting fixture. In one embodiment, a pair of SCRs, arranged...http://www.google.fr/patents/US5323088?utm_source=gb-gplus-shareBrevet US5323088 - Dimming control circuit
