Method for igniting and starting high-pressure discharge lamps
View Patent ↗A method for igniting and for starting high-pressure discharge lamps is provided. The method may include applying a takeover voltage to the lamp for a predetermined time of a burst; superimposing ignition pulses on the takeover voltage in such a way that the voltage of the ignition pulses and the takeover voltage are added up and an interruption being provided between two bursts; and changing the ignition pulses from burst to burst or within a burst from the positive half-cycle of the takeover voltage to the negative half-cycle of the takeover voltage, and vice versa.
1. A method for igniting and for starting high-pressure discharge lamps, the method comprising: applying a takeover voltage to the lamp for a predetermined time of a burst; superimposing ignition pulses on said takeover voltage in such a way that the voltage of the ignition pulses and the takeover voltage are added up and an interruption being provided between two bursts; and changing the ignition pulses from burst to burst or within a burst from the positive half-cycle of the takeover voltage to the negative half-cycle of the takeover voltage, and vice versa.
2. The method for igniting and for starting high-pressure discharge lamps as claimed in claim 1 , wherein the interruption between two bursts is shortened.
3. The method for igniting and for starting high-pressure discharge lamps as claimed in claim 1 , wherein the ignition pulses are changed from the positive half-cycle of the takeover voltage to the negative half-cycle of the takeover voltage, and vice versa, as soon as the abort criterion in a burst is reached, and not aborting the burst.
4. The method for igniting and for starting high-pressure discharge lamps as claimed in claim 1 , wherein the takeover voltage is a sinusoidal voltage with a frequency of several kHz.
5. The method for igniting and for starting high-pressure discharge lamps as claimed in claim 1 , wherein the takeover voltage is a square-wave voltage in the 100 Hz range.