Circuit and method for improved dimming of gas discharge lamps
摘要
A dimming circuit provides power from an ac source to a compact fluorescent lamp. The circuit generally includes a resonant circuit driven by a high-frequency switching inverter and a current feedback control system. The circuit is essentially an ac current source of unusually high impedance and provides substantially symmetrical high-frequency current to the lamp. This allows flicker-free dimming of compact fluorescent lamps over a wide range with good light output stability. A small amount of dc or low-frequency ac current may be simultaneously provided to the lamp. The resulting composite current waveform flowing through the lamp substantially eliminates visible striations over a dimming range from about 100% to 1% of full light output.
申请公布号
US5041763(A)
申请公布日期
1991.08.20
申请号
US19900553201
申请日期
1990.07.13
申请人
LUTRON ELECTRONICS CO., INC.
发明人
SULLIVAN, CHARLES R.;SPIRA, JOEL S.;LUCHACO, DAVID G.;JURELL, SCOTT R.;MOTTO, ERIC R.