Gas discharge lamp control circuit

专利名称：Gas discharge lamp control circuit发明人：Gary D. Lewis申请号：US05/814383申请日：19770711公开号：US04158793A公开日：19790619

摘要：An energizing circuit for gas discharge lamps for room or street lighting or forlights used in document copying machines and the like comprises means for continuouslyenergizing the same at a low non- useful light producing level when such lamps are notneeded by a voltage which strikes an arc and maintains a low level of ionization with aninfinitesimally small current and very little energy drain. This voltage may be an ACvoltage or a DC voltage supplied by a unique circuit including a number of DC voltagesources, rectifiers, voltage adjusting and current-limiting impedances and electronicswitches. The lamps are energized by AC or pulsating DC supplied by the aforesaid orother electronic switches operated at a high frequency of at least about 20-30 kilo-Hertz.When pulsating DC is utilized and the switches are rendered conductive, back-biasingvoltages are applied to rectifiers which disconnect one of the voltage sources and re-connect the same or another voltage source to a different terminal of the lamps whichcauses an increase in the current flow in the lamps, resulting in a high degree of ionizationto cause the lamps to emit substantial light. High operating lamp efficiency is achieved bymodulating the electronic switches at said high frequency rate and de-energizing allheater windings during normal lamp energization.

申请人：LEWIS; GARY D.

更多信息请下载全文后查看