Osram Gesellschaft MIT Beschraenkter Haftung

Osram Ag

Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Patent-Treuhand-Gesellschaft Für Elektrishe Glūhlampen Mbh

Osram Gmbh

Osram Gesellschaft MIT Beschrankter Haftung

Dirk Grundmann

Conrad Schimke

Andreas Naujoks

Frank Werner

Thomas Reiners

Michael Boenigk

Marc Czichy

Michael Bönigk

Peter Flesch

Florian Bedynek

Melanie Zumkley

Klaus Günther

Matthias Lau

Thomas Hartmann

Jürgen Almanstötter

Melanie Roth

Hasnaa Sarroukh

Markus Zahn

Johannes Kahsche

A high-pressure discharge lamp may include a discharge vessel which is sealed in a gas-tight manner and in which electrodes and an ionizable fill for generating a gas discharge are enclosed, the ionizable fill being in the form of a mercury-free fill which includes xenon and halides of the metals sodium, scandium, zinc and indium, wherein the weight ratio of the halides of zinc and indium is in the range of from 20 to 100, and wherein the coldfilling pressure of xenon is in the range of from 1.3 megapascal to 1.8 megapascal.

High-pressure discharge lamp and vehicle headlight with high-pressure discharge lamp

The invention relates to a high-pressure discharge lamp having a discharge vessel () sealed at both ends, a filling which can be ionized and is enclosed in the discharge area () of the discharge vessel (), and electrodes () which extend into the discharge area (), in order to produce a gas discharge, with the discharge vessel () having an electrically conductive coating () which is designed as a starting aid and is arranged at least in the boundary area () between the discharge area () and a first sealed end () of the discharge vessel ().

High-pressure discharge lamp

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 ().

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

A process for producing an electrode for high-pressure discharge lamps, at least the discharge-side section of the electrode being produced from a prefabricated tungsten wire, which is shortened to the required length during the production process of the electrode and subjected to an annealing process as well as being mounted on other components of the electrode that may be present. The annealing process is carried out exclusively at temperatures below 1500 degrees Celsius. The invention also relates to an electrode for high-pressure discharge lamps, at least the discharge-side section of the electrode being constructed as a tungsten rod that has a long crystalline structure or an isotropic crystalline structure with grain diameters in the radial direction of the tungsten rod of less than or equal to 50 micrometers with the centroid of the grain size distribution in the range from 10 micrometers to 20 micrometers.

Process for producing an electrode for high-pressure discharge lamps, and an electrode and a high-pressure discharge lamp with such electrodes

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.

High-pressure discharge lamp for vehicle headlights

Growing community of inventors

Berlin, Germany

Dirk Grundmann