Patent ID: 7221103
Filing Date: 2007-05-22
Classification: H05B,Y02B

Abstract:
1. A circuit for operating high-pressure discharge lamps, the circuit having a voltage converter for the purpose of supplying energy to a load circuit which is provided with connections for a high-pressure discharge lamp (La) and for the secondary winding (L 1 b ) of a starting transformer (T 1 ) of a pulse starting device which serves the purpose of starting the gas discharge in the high-pressure discharge lamp (La), characterized in that at least one capacitor (C 1 ), which is connected in series with the secondary winding (L 1 b ) of the starting transformer (T 1 ) when the pulse starting device is connected, is arranged in the load circuit, the capacitance of the capacitor (C 51 ) being dimensioned such that it essentially represents a short circuit for the starting pulses generated by the pulse starting device and the capacitor (C 51 ) is charged, before the gas discharge in the lamp is started, to a DC voltage which, together with the starting pulse or the starting pulses of the starting transformer (T 1 ), brings about starting of the gas discharge in the lamp.