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EP0612098A1 - Single-ended high pressure discharge lamp - Google Patents

Single-ended high pressure discharge lamp Download PDF

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Publication number
EP0612098A1
EP0612098A1 EP94101735A EP94101735A EP0612098A1 EP 0612098 A1 EP0612098 A1 EP 0612098A1 EP 94101735 A EP94101735 A EP 94101735A EP 94101735 A EP94101735 A EP 94101735A EP 0612098 A1 EP0612098 A1 EP 0612098A1
Authority
EP
European Patent Office
Prior art keywords
pressure discharge
lamp
base
discharge lamp
discharge vessel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94101735A
Other languages
German (de)
French (fr)
Other versions
EP0612098B1 (en
Inventor
Hartmuth Bastian
Karl-Heinz Gleixner
Achim Gosslar
Ulrich Dr. Henger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP0612098A1 publication Critical patent/EP0612098A1/en
Application granted granted Critical
Publication of EP0612098B1 publication Critical patent/EP0612098B1/en
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Expired - Lifetime legal-status Critical Current

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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
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors
    • H01J61/368—Pinched seals or analogous seals
    • 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
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space

Definitions

  • This lamp has an outer bulb in which a discharge vessel, which is surrounded by a cylindrical, translucent glass envelope, is held by means of a metallic lamp frame.
  • the envelope body has open ends. It acts as a heat accumulation tube and is also carried by the lamp frame.
  • a disadvantage of this arrangement is that additional retaining clips are required to attach this heat pipe to the lamp frame.
  • the high-pressure discharge lamps according to the invention with a base on one side have a tubular envelope made of glass, which coaxially surrounds the discharge vessel over its entire length.
  • the ends of the enveloping body are crimped over the lamp current leads protruding from the discharge vessel.
  • the envelope body is fixed at its ends and a better heat accumulation effect is achieved in the immediate vicinity of the discharge vessel. No additional holding parts for the enveloping body are required.
  • at least one of the lamp current feeds in the region of the envelope body crimp is advantageously provided with a flattening, a bend or a transverse bracket.
  • a pump-off cannula which is embedded in one of the squeezing ends of the enveloping body, enables problem-free evacuation of the interior of the enveloping body.
  • a lamp power supply 7 made of molybdenum is led out of the pinch seals 4a, 4b of the discharge vessel 4 and is electrically conductively connected to the corresponding molybdenum foil 6.
  • the two lamp power supplies 7 are each with a separate bracket 8a, 8b of the metallic lamp frame welded. Both lamp frame brackets 8a, 8b are melted into the base 3 of the plate.
  • the frame bracket 8b which is welded to the lamp power supply 7 protruding from the pinch seal 4b, extends partially parallel to the discharge vessel 4 and is fixed to an arch 9 in the dome of the outer bulb 1.
  • FIGS. 2a, 2b show two cross sections oriented perpendicular to one another through the pinch 11 of the enveloping body 10 facing the base 2 in accordance with the first exemplary embodiment.
  • the second exemplary embodiment (FIG. 3) of the high-pressure discharge lamp according to the invention which is capped on one side differs from the first exemplary embodiment explained above only in that the lamp current leads 7 'have a V-like bend 7a' in the area of the crimping ends 11 here instead of a flat 7a.
  • the two exemplary embodiments are the same in all other details.
  • the bruises at the ends of the enveloping body 10 do not necessarily have to extend over the entire diameter of the enveloping body 10. It is sufficient to squeeze the ends in the immediate vicinity of the lamp current leads 7 in order to fix the enveloping body 10 to these lamp current leads, as is shown in FIGS. 4 and 5, according to a third exemplary embodiment. Then the enveloping body ends have non-crushed areas 14 on both sides of their pinch 11 '(FIG. 5). In these non-crushed areas 14, the ends of the enveloping body are open, so that the interior of the enveloping body 10 and the outer bulb 1 are connected to one another. In all other details, this third embodiment corresponds to the first.
  • the invention is not limited to the exemplary embodiments explained in more detail above.
  • the pump-off cannula of the first exemplary embodiment can also be replaced by a pump stem or an opening in the wall of the enveloping body.

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  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

The invention relates to a single-base high-pressure discharge lamp whose discharge vessel (4) is completely surrounded by a heat concentration tube (10) and which is arranged inside an outer bulb (1). The ends (11) of the heat concentration tube (10) are pinched closed over the lamp current supply leads (7) projecting out of the discharge vessel (4). The heat concentration tube (10) is mounted in this way. Flat parts (7a) of the current supply leads (7) in the region of the pinched ends (11) serve as an anti-rotation element. <IMAGE>

Description

Die Erfindung betrifft eine einseitig gesockelte Hochdruckentladungslampe gemäß dem Oberbegriff des Schutzanspruchs 1.The invention relates to a high-pressure discharge lamp with a base on one side, according to the preamble of protective claim 1.

Eine derartige einseitig gesockelte Hochdruckentladungslampe ist beispielsweise in der US-PS 4 859 899 offenbart.Such a high-pressure discharge lamp with a base on one side is disclosed, for example, in US Pat. No. 4,859,899.

Diese Lampe weist einen Außenkolben auf, in dem ein Entladungsgefäß, das von einem zylindrischen, lichtdurchlässigen Hüllkörper aus Glas umgeben ist, mittels eines metallischen Lampengestells gehaltert wird. Der Hüllkörper besitzt offene Enden. Er wirkt als Wärmestaurohr und wird ebenfalls vom Lampengestell getragen. Ein Nachteil dieser Anordnung besteht darin, daß zur Befestigung dieses Wäremstaurohrs am Lampengestell zusätzliche Halteklammern erforderlich sind.This lamp has an outer bulb in which a discharge vessel, which is surrounded by a cylindrical, translucent glass envelope, is held by means of a metallic lamp frame. The envelope body has open ends. It acts as a heat accumulation tube and is also carried by the lamp frame. A disadvantage of this arrangement is that additional retaining clips are required to attach this heat pipe to the lamp frame.

Es ist die Aufgabe der Erfindung eine einseitig gesockelte Hochdruckentladungslampe bereitzustellen, die einen das Entladungsgefäß umschließenden und innerhalb des Außenkolbens angeordneten Hüllkörper mit einer vereinfachten Halterung und verbesserter Wärmestauwirkung besitzt.It is the object of the invention to provide a high-pressure discharge lamp with a base on one side, which has an enveloping body which surrounds the discharge vessel and is arranged inside the outer bulb, with a simplified mounting and improved heat accumulation effect.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Schutzanspruchs 1 gelöst. Besonders vorteilhafte Ausführungen der Erfindung sind in den Unteransprüchen beschrieben.This object is achieved by the characterizing features of the protection claim 1. Particularly advantageous Embodiments of the invention are described in the subclaims.

Die erfindungsgemäßen einseitig gesockelten Hochdruckentladungslampen besitzen einen rohrförmigen Hüllkörper aus Glas, der das Entladungsgefäß auf seiner gesamten Länge koaxial umgibt. Die Enden des Hüllkörpers sind über den aus dem Entladungsgefäß herausragenden Lampenstromzuführungen gequetscht. Durch diese Maßnahme wird der Hüllkörper an seinen Enden fixiert und eine bessere Wärmestauwirkung in unmittelbarer Umgebung des Entladungsgefäßes erzielt. Es sind keine zusätzlichen Halteteile für den Hüllkörper erforderlich.
Um eine verdrehsichere Halterung des Hüllkörpers zu gewährleisten, ist vorteilhafterweise zumindest eine der Lampenstromzuführungen im Bereich der Hüllkörperquetschung mit einer Anflachung, einer Biegung oder einem quer verlaufenden Bügel versehen. Eine Abpumpkanüle, die in einem der Quetschenden des Hüllkörpers eingebettet ist, ermöglicht ein problemloses Evakuieren des Hüllkörperinnenraums.The high-pressure discharge lamps according to the invention with a base on one side have a tubular envelope made of glass, which coaxially surrounds the discharge vessel over its entire length. The ends of the enveloping body are crimped over the lamp current leads protruding from the discharge vessel. As a result of this measure, the envelope body is fixed at its ends and a better heat accumulation effect is achieved in the immediate vicinity of the discharge vessel. No additional holding parts for the enveloping body are required.
In order to ensure that the envelope body is secured against rotation, at least one of the lamp current feeds in the region of the envelope body crimp is advantageously provided with a flattening, a bend or a transverse bracket. A pump-off cannula, which is embedded in one of the squeezing ends of the enveloping body, enables problem-free evacuation of the interior of the enveloping body.

Die Erfindung wird nachstehend anhand eines bevorzugten Ausführungsbeispiels näher erläutert. Es zeigen:

Figur 1
eine erfindungsgemäße einseitig gesockelte Hochdruckentladungslampe nach einem ersten Ausführungsbeispiel
Figur 2a
einen Querschnitt durch ein Quetschende des Hüllkörpers gemäß des ersten Ausführungsbeispiels
Figur 2b
einen Querschnitt durch das Quetschende aus Figur 2a, wobei die Querschnittsebene hier orthogonal zu der der Figur 2a ist
Figur 3
einen Querschnitt durch ein Quetschende des Hüllkörpers gemäß eines zweiten Ausführungsbeispiels
Figur 4
eine erfindungsgemäße Hochdruckentladungslampe nach einem dritten Ausführungsbeispiel
Figur 5
eine Draufsicht auf ein Ende des Hüllkörpers gemäß des dritten Ausführungsbeispiels.
The invention is explained below with reference to a preferred embodiment. Show it:
Figure 1
an inventive single-ended high-pressure discharge lamp according to a first embodiment
Figure 2a
a cross section through a crushing end of the enveloping body according to the first embodiment
Figure 2b
a cross section through the pinch end of Figure 2a, the cross-sectional plane here is orthogonal to that of Figure 2a
Figure 3
a cross section through a crushing end of the enveloping body according to a second embodiment
Figure 4
a high-pressure discharge lamp according to the invention according to a third embodiment
Figure 5
a plan view of one end of the enveloping body according to the third embodiment.

In Figur 1 ist ein erstes Ausführungsbeispiel einer erfindungsgemäßen einseitig gesockelten Hochdruckentladungslampe abgebildet. Sie besitzt einen im wesentlichen rotationssymmetrischen Außenkolben 1, der an einem Ende einen Schraubsockel 2 und eine Tellerfußeinschmelzung 3 aufweist. Innerhalb des Außenkolbens 1 befindet sich ein zweiseitig abgedichtetes, axial ausgerichtetes Entladungsgefäß 4 aus Quarzglas, in dem eine ionisierbare Füllung und zwei Elektroden 5 gasdicht eingeschlossen sind. Das Entladungsgefäß 4 besitzt eine sockelnahe 4a und eine sockelferne 4b Quetschdichtung mit jeweils einer eingeschmolzenen Molybdänfolie 6, die mit je einer der Elektroden 5 elektrisch leitend verbunden sind. Aus den Quetschdichtungen 4a, 4b des Entladungsgefäßes 4 ist jeweils eine Lampenstromzuführung 7 aus Molybdän herausgeführt, die mit der entsprechenden Molybdänfolie 6 elektrisch leitend verbunden sind.
Die beiden Lampenstromzuführungen 7 sind mit je einem separaten Bügel 8a, 8b des metallischen Lampengestells verschweißt. Beide Lampengestellbügel 8a, 8b sind im Tellerfuß 3 eingeschmolzen. Der mit der aus der sockelfernen Quetschdichtung 4b herausragenden Lampenstromzuführung 7 verschweißte Gestellbügel 8b verläuft teilweise parallel zum Entladungsgefäß 4 und ist an einer Einwölbung 9 im Dom des Außenkolben 1 fixiert.FIG. 1 shows a first exemplary embodiment of a high-pressure discharge lamp based on one side and according to the invention. It has an essentially rotationally symmetrical outer bulb 1, which has a screw base 2 and a plate base melt 3 at one end. Inside the outer bulb 1 there is a bilaterally sealed, axially aligned discharge vessel 4 made of quartz glass, in which an ionizable filling and two electrodes 5 are enclosed gas-tight. The discharge vessel 4 has a base-near 4a and a base-distant 4b pinch seal, each with a melted-in molybdenum foil 6, which are each conductively connected to one of the electrodes 5. A lamp power supply 7 made of molybdenum is led out of the pinch seals 4a, 4b of the discharge vessel 4 and is electrically conductively connected to the corresponding molybdenum foil 6.
The two lamp power supplies 7 are each with a separate bracket 8a, 8b of the metallic lamp frame welded. Both lamp frame brackets 8a, 8b are melted into the base 3 of the plate. The frame bracket 8b, which is welded to the lamp power supply 7 protruding from the pinch seal 4b, extends partially parallel to the discharge vessel 4 and is fixed to an arch 9 in the dome of the outer bulb 1.

Das Entladungsgefäß 4 wird auf seiner gesamten Länge von einem zylindrischen, lichtdurchlässigen Hüllkörper 10 koaxial umschlossen. Die Enden dieses als Wärmestaurohr wirkenden Hüllkörpers 10 sind über den Lampenstromzuführungen 7 gequetscht, so daß das Entladungsgefäß 4 vollkommen innerhalb des Hüllkörpers 10 angeordnet ist. Der Hüllkörper 10 wird von den Lampenstromzuführungen 7 gehaltert. Im Bereich der Quetschungen 11 des Hüllkörpers 10 sind die Lampenstromzuführungen 7 jeweils mit einer Anflachung 7a versehen. Dadurch wird die Lagefixierung des Hülllörpers 10, insbesondere gegenüber Verdrehung, verbessert. In die sockelnahe Quetschung des Hüllkörpers 10 ist eine Abpumpkanüle 12 eingeschmolzen, die das Evakuieren des Hüllkörpers erleichtert. Der zum Aussenkolben 9 geführte Gestellbügel 8b trägt einen Getter 13.The discharge vessel 4 is coaxially enclosed over its entire length by a cylindrical, transparent envelope 10. The ends of this envelope body 10, which acts as a heat accumulation tube, are squeezed over the lamp current feeds 7, so that the discharge vessel 4 is arranged entirely within the envelope body 10. The envelope body 10 is held by the lamp power supply 7. In the area of the squeezes 11 of the enveloping body 10, the lamp current feeds 7 are each provided with a flat 7a. As a result, the position fixing of the enveloping body 10, in particular with respect to rotation, is improved. A pumping-off cannula 12 is melted into the pinch of the enveloping body 10 near the base, which facilitates the evacuation of the enveloping body. The frame bracket 8b led to the outer bulb 9 carries a getter 13.

Die Figuren 2a, 2b zeigen zwei senkrecht zueinander orientierte Querschnitte durch die dem Sockel 2 zugewandte Quetschung 11 des Hüllkörpers 10 entsprechend dem ersten Ausführungsbeispiel.FIGS. 2a, 2b show two cross sections oriented perpendicular to one another through the pinch 11 of the enveloping body 10 facing the base 2 in accordance with the first exemplary embodiment.

Das zweite Ausführungsbeispiel (Figur 3) der erfindungsgemäßen einseitig gesockelten Hochdruckentladungslampe unterscheidet sich vom oben erläuterten ersten Ausführungsbeispiel nur dadurch, daß die Lampenstromzuführungen 7' im Bereich der Hüllkörperquetschenden 11 hier anstelle einer Anflachung 7a eine V-artige Biegung 7a' aufweisen. In allen anderen Details stimmen die beiden Ausführungsbeispiele überein.The second exemplary embodiment (FIG. 3) of the high-pressure discharge lamp according to the invention which is capped on one side differs from the first exemplary embodiment explained above only in that the lamp current leads 7 'have a V-like bend 7a' in the area of the crimping ends 11 here instead of a flat 7a. The two exemplary embodiments are the same in all other details.

Die Quetschungen an den Enden des Hüllkörpers 10 müssen sich nicht unbedingt über den gesamten Durchmesser des Hüllkörpers 10 erstrecken. Es genügt, die Enden in unmittelbarer Umgebung der Lampenstromzuführungen 7 zu quetschen, um den Hüllkörper 10 an diesen Lampenstromzuführungen zu fixieren, wie das in den Figuren 4 und 5, gemäß eines dritten Ausführungsbeispiels dargestellt ist. Dann besitzen die Hüllkörperenden zu beiden Seiten ihrer Quetschung 11' noch ungequetschte Bereiche 14 (Fig. 5). In diesen ungequetschten Bereichen 14 sind die Hüllkörperenden offen, so daß die Innenräume von Hüllkörper 10 und Außenkolben 1 miteinander in Verbindung stehen. In allen anderen Details stimmt dieses dritte Ausführungsbeispiel mit dem ersten überein.The bruises at the ends of the enveloping body 10 do not necessarily have to extend over the entire diameter of the enveloping body 10. It is sufficient to squeeze the ends in the immediate vicinity of the lamp current leads 7 in order to fix the enveloping body 10 to these lamp current leads, as is shown in FIGS. 4 and 5, according to a third exemplary embodiment. Then the enveloping body ends have non-crushed areas 14 on both sides of their pinch 11 '(FIG. 5). In these non-crushed areas 14, the ends of the enveloping body are open, so that the interior of the enveloping body 10 and the outer bulb 1 are connected to one another. In all other details, this third embodiment corresponds to the first.

Die Erfindung beschränkt sich nicht nur auf die oben näher erläuterten Ausführungsbeispiele. So ist es beispielweise möglich, die Lampenstromzuführungen im Bereich der Hüllkörperquetschungen mäanderförmig auszubilden oder mit einem angeschweißten Querbalken zu versehen, um den Hüllkörper verdrehungssicher zu fixieren. Ferner kann die Abpumpkanüle des ersten Ausführungsbeispiels auch durch einen Pumpstengel bzw. eine Öffnung in der Hüllkörperwandung ersetzt werden.The invention is not limited to the exemplary embodiments explained in more detail above. For example, it is possible to design the lamp current feeds in a meandering shape in the area of the pinch body or to provide them with a welded-on crossbeam in order to fix the body securely against rotation. Furthermore, the pump-off cannula of the first exemplary embodiment can also be replaced by a pump stem or an opening in the wall of the enveloping body.

Claims (7)

Einseitig gesockelte Hochdruckentladungslampe bestehend aus - einem zweiseitig abgedichteten Entladungsgefäß (4) mit darin angeordneten Elektroden (5), wobei diese elektrisch leitend mit jeweils einer aus dem Entladungsgefäß (4) herausgeführten Lampenstromzuführung (7, 7') verbunden sind, - einer im Entladungsgefäß (4) gasdicht eingeschlossenen ionisierbaren Füllung, - einem Außenkolben (1), in dem das Entladungsgefäß (4) mit Hilfe eines Gestells (8a, 8b) gehaltert wird, - einem rohrartigen Hüllkörper (10) aus Glas, der innerhalb des Außenkolbens (1) koaxial mit dem Entladungsgefäß (4) angeordnet ist und das Entladungsgefäß (4) auf seiner gesamten Länge umgibt, dadurch gekennzeichnet, daß die Enden des Hüllkörpers (10) mit Quetschungen (11, 11') versehen sind, mittels derer der Hüllkörper (10) an den Lampenstromzuführungen (7, 7') fixiert ist.Single-ended high-pressure discharge lamp consisting of - A discharge vessel (4) sealed on two sides with electrodes (5) arranged therein, these being connected in an electrically conductive manner to a lamp current lead (7, 7 ') led out of the discharge vessel (4), an ionizable filling enclosed in a gas-tight manner in the discharge vessel (4), - an outer bulb (1) in which the discharge vessel (4) is held with the aid of a frame (8a, 8b), a tubular envelope (10) made of glass, which is arranged coaxially with the discharge vessel (4) within the outer bulb (1) and surrounds the discharge vessel (4) over its entire length, characterized in that the ends of the envelope body (10) are provided with squeezes (11, 11 '), by means of which the envelope body (10) is fixed to the lamp current leads (7, 7'). Einseitig gesockelte Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß die Quetschungen (11) sich über den gesamten Durchmesser der Hüllkörperenden erstrecken und diese verschliessen.High-pressure discharge lamp with a base on one side according to Claim 1, characterized in that the bruises (11) extend over the entire diameter of the envelope body ends and close them. Einseitig gesockelte Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß die Hüllkörperenden ungequetschte Bereiche (14) aufweisen, über die die Innenräume von Hüllkörper (10) und Außenkolben (1) miteinander in Verbindung stehen.High-pressure discharge lamp with a base on one side according to Claim 1, characterized in that the ends of the enveloping body have non-crushed regions (14) via which the interior spaces of the enveloping body (10) and the outer bulb (1) are connected to one another. Einseitig gesockelte Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß zumindest eine der Lampenstromzuführungen (7) im Bereich der Quetschung (11, 11') eine Anflachung (7a) aufweist.High-pressure discharge lamp with a base on one side according to Claim 1, characterized in that at least one of the lamp current leads (7) has a flattened portion (7a) in the area of the pinch (11, 11 '). Einseitig gesockelte Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß zumindest eine der Lampenstromzuführungen (7') im Bereich der Quetschung (11) eine in der Quetschungsebene liegende Biegung (7a') aufweist.High-pressure discharge lamp with a base on one side according to Claim 1, characterized in that at least one of the lamp current leads (7 ') in the area of the pinch (11) has a bend (7a') lying in the pinch plane. Einseitig gesockelte Hochdruckentladungslampe nach Anspruch 5, dadurch gekennzeichnet, daß beide Lampenstromzuführungen (7') im Bereich der Quetschungen (11) einen in der Quetschungsebene liegenden V-förmigen Abschnitt (7a') aufweisen.High-pressure discharge lamp with a base on one side according to Claim 5, characterized in that both lamp current feeds (7 ') have a V-shaped section (7a') in the area of the pinches (11) in the pinch plane. Einseitig gesockelte Hochdruckentladungslampe nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß der Hüllkörper (10) eine Abpumpkanüle (12) besitzt, die in einer der Quetschungen (11) eingebettet ist.High-pressure discharge lamp with a base on one side according to Claims 1 and 2, characterized in that the enveloping body (10) has an evacuation cannula (12) which is embedded in one of the squeezes (11).
EP94101735A 1993-02-18 1994-02-04 Single-ended high pressure discharge lamp Expired - Lifetime EP0612098B1 (en)

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DE9302382U DE9302382U1 (en) 1993-02-18 1993-02-18 Single-ended high-pressure discharge lamp
DE9302382U 1993-02-18

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EP0612098B1 EP0612098B1 (en) 1996-04-17

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US6844676B2 (en) * 2001-10-01 2005-01-18 Koninklijke Philips Electronics N.V. Ceramic HID lamp with special frame wire for stabilizing the arc
JP4130842B2 (en) * 2006-05-31 2008-08-06 松下電器産業株式会社 Metal vapor discharge lamp and lighting device

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Publication number Publication date
EP0612098B1 (en) 1996-04-17
JP3001186U (en) 1994-08-23
US5453654A (en) 1995-09-26
DE59400200D1 (en) 1996-05-23
DE9302382U1 (en) 1993-04-15

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