High-pressure discharge lamp with improved color point stability and high luminous efficacy

High pressure discharge lamp comprises an inner bulb (1) with a discharge chamber, electrodes extending into the discharge chamber, and optionally an outer bulb (2) surrounding the inner bulb. The discharge chamber has an ionizable filling made from a noble gas, 0-10 mg mercury and a metal halide mi...

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Bibliographische Detailangaben
Hauptverfasser:	SCHOELLER KLAUS, GERVELMEYER ROLF
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS BLASTING ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO USESOR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS LIGHTING MECHANICAL ENGINEERING NON-PORTABLE LIGHTING DEVICES SYSTEMS THEREOF VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS WEAPONS
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Beschreibung
Zusammenfassung:	High pressure discharge lamp comprises an inner bulb (1) with a discharge chamber, electrodes extending into the discharge chamber, and optionally an outer bulb (2) surrounding the inner bulb. The discharge chamber has an ionizable filling made from a noble gas, 0-10 mg mercury and a metal halide mixture containing 40-80 wt.% sodium halide, 25-55 wt.% scandium halide, 1-15 wt.% indium halide, and 0-34 wt.% thallium halide. Independent claims are also included for the following: (1) Ionizable filling made from a noble gas, 0-10 mg mercury and a metal halide mixture containing 40-80 wt.% sodium halide, 25-55 wt.% scandium halide, 1-15 wt.% indium halide, and 0-34 wt.% thallium halide; and (2) Illuminating unit, especially a vehicle headlight, containing the high pressure discharge lamp.