Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Osram Ag

Osram Gesellschaft MIT Beschraenkter Haftung

Narva Berliner Gluehlampenwerk Gmbh

Osram Gmbh

Michael Bönigk

Thomas Reiners

Dirk Grundmann

Conrad Schimke

Florian Bedynek

Andreas Naujoks

Matthias Lau

Melanie Roth

A device for operating a high-pressure discharge lamp () with a bipolar supply current and a regulated power input. The device includes a regulator () with an asymmetrical regulating characteristic curve for forming a current or power impulse (K, K) close to the zero crossing of the supply current.

Device and method for operating a high-pressure discharge lamp

The invention relates to a high-pressure discharge lamp having a transparent discharge vessel, an ionizable filling which is arranged in the discharge space of the discharge vessel and electrodes, which extend into the discharge space of the discharge vessel, for the purpose of producing a gas discharge, as well as power supply lines, which are passed out of the discharge vessel, for the purpose of supplying energy to the electrodes, the discharge vessel of the high-pressure discharge lamp being provided partially with an electrically conductive coating, with the result that a capacitive coupling is produced between the coating and at least one electrode and/or power supply line. As a result, the starting properties and the luminous efficiency of the lamp are improved.

High-pressure discharge lamp having electrically conductive transparent coating

Electrical circuit for the pulsed operation of high-pressure

In a method for operating high-pressure discharge lamps in a pulsed mode to improve the light properties thereof, gating pulses for the high-pressure discharge lamp are in the form of pulse groups of bipolar individual pulses with a pulse width of less than 100 .mu.s. The repetition frequency of the pulse groups is higher than 100 Hz at a duty cycle of less than 0.8 and the individual pulses have a frequency of more than 400 Hz at an arbitrary duty cycle. A sinusoidal keep alive current or direct current is applied to the lamp between the pulse groups. The individual pulses can be spike pulses.

Method for the pulsed mode of operation of high-pressure discharge lamps

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Berlin, Germany

Michael Bönigk