DE102005007680A1 - Gas discharge lamp for motor vehicle-headlight, has electrodes extending into hollow space and ignition aid electrode arranged as electrically conducting layer, where conducting layer is formed as layer of transparent conducting oxide - Google Patents
Gas discharge lamp for motor vehicle-headlight, has electrodes extending into hollow space and ignition aid electrode arranged as electrically conducting layer, where conducting layer is formed as layer of transparent conducting oxide Download PDFInfo
- Publication number
- DE102005007680A1 DE102005007680A1 DE200510007680 DE102005007680A DE102005007680A1 DE 102005007680 A1 DE102005007680 A1 DE 102005007680A1 DE 200510007680 DE200510007680 DE 200510007680 DE 102005007680 A DE102005007680 A DE 102005007680A DE 102005007680 A1 DE102005007680 A1 DE 102005007680A1
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- Germany
- Prior art keywords
- gas discharge
- discharge lamp
- layer
- cavity
- lamp according
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
- H01J61/547—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode outside the vessel
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- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Gasentladungslampe, insbesondere für Kraftfahrzeugscheinwerfer umfassend einen Brenner mit einem Hohlraum, in dem sich ein Gas befindet, mindestens zwei Elektroden, die in den Hohlraum hineinragen und zwischen denen im Betriebszustand der Gasentladungslampe ein Lichtbogen ausgebildet wird, sowie mindestens eine Zündhilfselektrode, die als elektrisch leitende Schicht auf der Außenseite des Brenners zumindest abschnittsweise im Bereich des Hohlraums angeordnet ist.The The present invention relates to a gas discharge lamp, in particular for motor vehicle headlights comprising a burner with a cavity in which a gas located, at least two electrodes, which protrude into the cavity and between those in the operating state of the gas discharge lamp an arc is formed, as well as at least one auxiliary ignition electrode, which as electrical conductive layer on the outside of the burner at least in sections in the region of the cavity is arranged.
Eine
Gasentladungslampe der vorgenannten Art ist aus der europäischen Patentschrift
Als nachteilig bei einer derartigen Gasentladungslampe erweist sich die Tatsache, dass diese Lampe bei Verwendung in einem Kraftfahrzeugscheinwerfer in einer genau vorgegebenen Orientierung eingebaut werden muss. Weiterhin kann der durch die Metallisierung gegebene Reflektor nicht hinsichtlich seiner optischen Funktionalität für die Lampe und die nachfolgende Lichtverteilung optimiert werden, weil der Reflektor durch die Wandung des Hohlraums gebildet wird, in dem die Gasentladung stattfindet. Die Form dieser Wandung wird in der Regel so gestaltet, dass die Gasentladung optimiert wird.When disadvantageous in such a gas discharge lamp proves the fact that this lamp when used in a motor vehicle headlight must be installed in a precisely predetermined orientation. Furthermore, the given by the metallization reflector is not in terms its optical functionality for the lamp and the subsequent light distribution can be optimized because of Reflector is formed by the wall of the cavity, in the the gas discharge takes place. The shape of this wall is in the Generally designed to optimize the gas discharge.
Das der vorliegenden Erfindung zugrunde liegende Problem ist die Schaffung einer Gasentladungslampe der eingangs genannten Art, bei der das austretende Licht nicht oder nur unwesentlich durch die Zündhilfselektrode beeinflusst wird.The The problem underlying the present invention is the creation a gas discharge lamp of the type mentioned, in which the exiting Light not or only slightly influenced by the auxiliary ignition electrode becomes.
VORTEILE DER ERFINDUNGADVANTAGES OF INVENTION
Dies wird erfindungsgemäß dadurch erreicht, dass die die Zündhilfselektrode bildende elektrisch leitende Schicht als Schicht aus einem transparenten leitenden Oxid (TCO) ausgebildet ist. Derartige TCO-Schichten sind in der Regel ausreichend transparent, um das von dem Lichtbogen erzeugte Licht ungehindert aus dem Hohlraum austreten zu lassen. Die Gasentladungslampe könnte somit einerseits in einer denkbaren Gestaltung in vergleichsweise beliebigen Orientierungen hinsichtlich der Drehung um ihre Längsachse in eine entsprechende Halterung in einem Kraftfahrzeugscheinwerfer eingebaut werden. Andererseits kann ein für die Formung eines Lichtstrahls zu verwendender Reflektor hinter der Gasentladungslampe positioniert werden und hinsichtlich des zu erzielenden Lichtbündels optimiert werden.This is characterized according to the invention achieved that the the auxiliary ignition electrode forming electrically conductive layer as a layer of a transparent conductive oxide (TCO) is formed. Such TCO layers are usually sufficiently transparent to that of the arc generated light freely to escape from the cavity. The gas discharge lamp could thus on the one hand in a conceivable design in comparative any orientation with respect to the rotation about its longitudinal axis in a corresponding holder in a motor vehicle headlight to be built in. On the other hand, one for the shaping of a light beam to be used reflector positioned behind the gas discharge lamp be optimized and in terms of the light beam to be achieved.
Es besteht dabei die Möglichkeit, dass die die Zündhilfselektrode bildende elektrisch leitende Schicht zumindest teilweise aus zinndotiertem Indium-Oxid (ITO) besteht.It there is the possibility that the the auxiliary ignition electrode forming electrically conductive layer at least partially made of tin doped Indium oxide (ITO) exists.
Alternativ oder zusätzlich dazu kann die die Zündhilfselektrode bildende Schicht zumindest teilweise aus aluminiumdotiertem Zink-Oxid (ZnO:Al) bestehen.alternative or additionally this can be the Zündhilfselektrode forming layer at least partially made of aluminum-doped zinc oxide (ZnO: Al) exist.
Alternativ oder zusätzlich dazu kann die die Zündhilfselektrode bildende Schicht zumindest teilweise aus fluordotiertem Zinn-Oxid (SnO:F) bestehen. Sämtliche der vorgenannten Materialien bilden transparente elektrisch leitende Schichten aus.alternative or additionally this can be the Zündhilfselektrode forming layer at least partially made of fluorine-doped tin oxide (SnO: F) exist. All the aforementioned materials form transparent electrically conductive Layers off.
Es besteht die Möglichkeit, dass die die Zündhilfselektrode bildende Schicht eine Schichtdicke zwischen 50 nm und 500 nm, insbesondere eine Schichtdicke von etwa 200 nm aufweist. Eine derartig geringe Schichtdicke ist ausreichend, um die Funktion als Zündhilfselektrode zu erfüllen.It it is possible, that the the auxiliary ignition electrode forming layer has a layer thickness between 50 nm and 500 nm, in particular has a layer thickness of about 200 nm. Such a small one Layer thickness is sufficient to function as a starting auxiliary electrode to fulfill.
Insbesondere können die zwei in den Hohlraum hineinragenden Elektroden von entgegengesetzten Seiten in den Hohlraum hineinragen.Especially can the two protruding into the cavity electrodes of opposite Protruding sides into the cavity.
Vorzugsweise erstreckt sich die die Zündhilfselektrode bildende Schicht in der Richtung, in der sich die Elektroden gegenüberliegen im Wesentlichen über den gesamten Hohlraum hinweg. Insbesondere kann auf diese Weise die Schicht bei einer Ausführungsform der vorliegenden Erfindung wirkungsvoll zur anfänglichen Ausbildung eines Lichtbogens beitragen.Preferably, the layer forming the auxiliary starting electrode extends in the direction in which the electrodes face each other substantially over the entire cavity. In particular, in this way the layer at a Embodiment of the present invention effectively contribute to the initial formation of an arc.
Dabei kann vorgesehen sein, dass die die Zündhilfselektrode bildende Schicht im Wesentlichen streifenförmig ausgebildet ist. Auf diese Weise kann die von der transparenten elektrisch leitenden Schicht bedeckte Fläche des Hohlraums vergleichsweise klein gehalten werden.there can be provided that the Zündhilfseldede forming layer essentially strip-shaped is trained. In this way, that of the transparent electrically conductive layer covered area of the cavity comparatively kept small.
Es besteht die Möglichkeit, dass die die Zündhilfselektrode bildende Schicht von einem Kontakt kontaktiert ist.It it is possible, that the the auxiliary ignition electrode forming layer is contacted by a contact.
Dabei kann der Kontakt elektrisch leitend beziehungsweise galvanisch mit einer der beiden Elektroden verbunden sein. Alternativ kann der Kontakt auch kapazitiv beziehungsweise galvanisch nicht gekoppelt mit einer der Elektroden, insbesondere mit Masse verbunden sein.there the contact can be electrically conductive or galvanic with be connected to one of the two electrodes. Alternatively, the Contact also capacitive or not galvanically coupled be connected to one of the electrodes, in particular to ground.
ZEICHNUNGENDRAWINGS
Weitere Merkmale und Vorteile der vorliegenden Erfindung werden deutlich anhand der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele unter Bezugnahme auf die beiliegenden Abbildungen. Darin zeigenFurther Features and advantages of the present invention will become apparent with reference to the following description of preferred embodiments with reference to the attached figures. Show in it
BESCHREIBUNG DER AUSFÜHRUNGSBEISPIELEDESCRIPTION OF THE EMBODIMENTS
Aus
In
dem Hohlraum
An
der in
Aus
Die
Schichtdicke der die Zündhilfselektrode
Aufgrund
der Tatsache, dass die die Zündhilfselektrode
Es
besteht die Möglichkeit,
den Brenner
Die
die Zündhilfselektrode
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510007680 DE102005007680A1 (en) | 2005-02-19 | 2005-02-19 | Gas discharge lamp for motor vehicle-headlight, has electrodes extending into hollow space and ignition aid electrode arranged as electrically conducting layer, where conducting layer is formed as layer of transparent conducting oxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510007680 DE102005007680A1 (en) | 2005-02-19 | 2005-02-19 | Gas discharge lamp for motor vehicle-headlight, has electrodes extending into hollow space and ignition aid electrode arranged as electrically conducting layer, where conducting layer is formed as layer of transparent conducting oxide |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005007680A1 true DE102005007680A1 (en) | 2006-08-31 |
Family
ID=36793992
Family Applications (1)
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DE200510007680 Withdrawn DE102005007680A1 (en) | 2005-02-19 | 2005-02-19 | Gas discharge lamp for motor vehicle-headlight, has electrodes extending into hollow space and ignition aid electrode arranged as electrically conducting layer, where conducting layer is formed as layer of transparent conducting oxide |
Country Status (1)
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DE (1) | DE102005007680A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8330371B2 (en) | 2010-09-14 | 2012-12-11 | Osram Sylvania Inc. | Apparatus, system, and method of controlling ignition timing of a HID lamp using a third electrode |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4020385A (en) * | 1976-08-09 | 1977-04-26 | Gte Sylvania Incorporated | Fluorescent lamp having conductive film and protective film therefor |
DE2741693A1 (en) * | 1976-09-21 | 1978-03-23 | Westinghouse Electric Corp | High pressure sodium vapour lamp - has arc tube held in supporting frame inside outer envelope with ignition aid |
GB1564260A (en) * | 1976-11-19 | 1980-04-02 | Philips Nv | Low-pressure mercury vapour discharge lamp |
GB2097179A (en) * | 1981-02-27 | 1982-10-27 | Mitsubishi Mining & Cement Co | Starting discharge lamps |
EP0453652B1 (en) * | 1990-04-27 | 1995-08-30 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | High pressure discharge lamp |
US5539277A (en) * | 1992-12-28 | 1996-07-23 | General Electric Company | Fluorescent lamp having high resistance conductive coating adjacent the electrodes |
JPH10214602A (en) * | 1996-11-29 | 1998-08-11 | Toshiba Lighting & Technol Corp | Rapid start type fluorescent lamp and lighting system |
US6456005B1 (en) * | 2000-10-31 | 2002-09-24 | General Electric Company | Materials and methods for application of conducting members on arc tubes |
US6538377B1 (en) * | 2000-11-03 | 2003-03-25 | General Electric Company | Means for applying conducting members to arc tubes |
-
2005
- 2005-02-19 DE DE200510007680 patent/DE102005007680A1/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4020385A (en) * | 1976-08-09 | 1977-04-26 | Gte Sylvania Incorporated | Fluorescent lamp having conductive film and protective film therefor |
DE2741693A1 (en) * | 1976-09-21 | 1978-03-23 | Westinghouse Electric Corp | High pressure sodium vapour lamp - has arc tube held in supporting frame inside outer envelope with ignition aid |
GB1564260A (en) * | 1976-11-19 | 1980-04-02 | Philips Nv | Low-pressure mercury vapour discharge lamp |
GB2097179A (en) * | 1981-02-27 | 1982-10-27 | Mitsubishi Mining & Cement Co | Starting discharge lamps |
EP0453652B1 (en) * | 1990-04-27 | 1995-08-30 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | High pressure discharge lamp |
US5539277A (en) * | 1992-12-28 | 1996-07-23 | General Electric Company | Fluorescent lamp having high resistance conductive coating adjacent the electrodes |
JPH10214602A (en) * | 1996-11-29 | 1998-08-11 | Toshiba Lighting & Technol Corp | Rapid start type fluorescent lamp and lighting system |
US6456005B1 (en) * | 2000-10-31 | 2002-09-24 | General Electric Company | Materials and methods for application of conducting members on arc tubes |
US6538377B1 (en) * | 2000-11-03 | 2003-03-25 | General Electric Company | Means for applying conducting members to arc tubes |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8330371B2 (en) | 2010-09-14 | 2012-12-11 | Osram Sylvania Inc. | Apparatus, system, and method of controlling ignition timing of a HID lamp using a third electrode |
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