Discharge lamp with galvanic and dielectric electrodes and method

Method for operating discharge lamps (12;19;23) with a discharge chamber (3) whereby a sequence of voltage pulses generates a dielectrically un-impeded pulsed discharge inside the discharge chamber (3), characterized in that additionally a dielectrically impeded discharge is generated inside the discharge chamber (3) and thereby the spectral distribution of the radiation emitted by the discharge lamp (12;19;23) is influenced and the level of the voltage pulses required for the dielectrically un-impeded pulsed discharge is reduced so that the required level is lower with additional, dielectrically impeded discharge than without additional dielectrically impeded discharge, the dielectrically impeded discharge being generated by a sequence of voltage pulses, whereby the individual voltage pulses respectively are separated from each other by pauses, the sequence of the voltage pulses for the generation of the un-impeded discharge being synchronized with the sequence of the voltage pulses for the generation of the dielectrically impeded discharge.

Method for operating discharge lamps (12;19;23) with a discharge chamber (3) whereby a sequence of voltage pulses generates a dielectrically un-impeded pulsed discharge inside the discharge chamber (3), characterized in that additionally a dielectrically impeded discharge is generated inside the discharge chamber (3) and thereby the spectral distribution of the radiation emitted by the discharge lamp (12;19;23) is influenced and the level of the voltage pulses required for the dielectrically un-impeded pulsed discharge is reduced so that the required level is lower with additional, dielectrically impeded discharge than without additional dielectrically impeded discharge, the dielectrically impeded discharge being generated by a sequence of voltage pulses, whereby the individual voltage pulses respectively are separated from each other by pauses, the same sequence of voltage pulses being used for the generation of the dielectrically impeded discharge as well as the dielectrically un-impeded discharge.

Discharge lamp (12;19;23) suited for operation according to a method for operating said discharge lamps (12;19;23) with a discharge chamber (3) whereby a sequence of voltage pulses generates a dielectrically un-impeded pulsed discharge inside the discharge chamber (3), characterized in that additionally a dielectrically impeded discharge is generated inside the discharge chamber (3) and thereby the spectral distribution of the radiation emitted by the discharge lamp (12;19;23) is influenced and the level of the voltage pulses required for the dielectrically un-impeded pulsed discharge is reduced so that the required level is lower with additional, dielectrically impeded discharge than without additional dielectrically impeded discharge, with a hermetically sealed discharge chamber (3) containing an ionizable filling and having in its interior two opposing unheated galvanic electrodes (5,6) connected to electrical leads (7,8), whereby the leads (7,8) extend in gas-tight manner through the ends of the discharge chamber (3) to the exterior, the discharge chamber (3) being additionally equipped with at least one dielectric electrode (13,14;17,18;24).