Osram Gesellschaft MIT Beschraenkter Haftung

Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Patent-Treuhand-Gesellschaft Für Elektrishe Glūhlampen Mbh

Osram Gmbh

Conrad Schimke

Dirk Grundmann

Frank Werner

Thomas Reiners

Michael Bönigk

Matthias Burkhardt

Andreas Naujoks

Florian Bedynek

A high-pressure discharge lamp includes a quartz glass discharge chamber () having at least one end () provided with a molybdenum film sealing element () and at least one electrode () which is connected to the sealing element () and is protruded in the lower chamber () of the discharge chamber (), wherein the lamp includes a spiral () whose slope is equal to or greater than 600% and which encompasses the part of the electrode () in the end () area provided with the sealing element () of the discharge chamber () outside of the sealing element ().

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

The invention relates to a transformer for generating a starting voltage for a high-pressure discharge lamp having a ferrite core and at least one primary winding as well as at least one secondary winding, the at least one secondary winding being formed by a metal strip which is arranged on the ferrite core such that the high-voltage carrying end of the at least one secondary winding is arranged on the inside. In addition, the invention relates to a high-pressure discharge lamp, preferably a mercury-free metal halide high-pressure discharge lamp, having such a transformer which is arranged as a starting transformer in the lamp base of the lamp, and to a high-pressure discharge lamp having a transformer which is arranged in the lamp base and whose secondary winding has a DC resistance of less than or equal to 0.5 ohm.

Transformer and starting device having a transformer, and high pressure discharge lamp having a transformer

A high-pressure discharge lamp for a vehicle headlight having a discharge vessel and electrodes arranged therein for the purpose of generating a gas discharge, the discharge vessel having a central section which is delimited by two planes which are arranged perpendicularly to the connection path of the discharge-side ends of the electrodes and each extend through the discharge-side end of one of the electrodes, wherein the volume, which is arranged in said central section and is filled by the material of the discharge vessel, is greater than or equal to 95 mm.

High-pressure discharge lamp with improved discharge vessel structure

The invention relates to a mercury-free high-pressure discharge lamp for use in a vehicle headlight. The ionizable filling of the high-pressure discharge lamp according to the invention comprises exclusively xenon and the halides of the metals sodium, scandium, indium and zinc.

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Berlin, Germany

Conrad Schimke