ELECTRONIC DEVICE FOR THE STARTING AND A.C.VOLTAGE OPERATION OF A GAS AND/OR VAPOUR DISCHARGE LAMP

摘要

18 The invention relates to an electronic device for the starting and a.c. operation of a capacitively stabilised discharge lamp. The device is provided with a controlled semiconductor switching element which, in the operating condition of the lamp is briefly conductive in each half cycle of the mains. In accordance with the invention there is provided in the control circuit of the semiconductor switching element a second switching element which during the starting procedure of the lamp ensures that the semiconductor switching element is made conductive only every alternate half cycle. This iscreases the chance for a proper ignition of the lamp.