EP0245735B1 - High-pressure discharge lamp, and method of operating the high-pressure discharge lamp - Google Patents
High-pressure discharge lamp, and method of operating the high-pressure discharge lamp Download PDFInfo
- Publication number
- EP0245735B1 EP0245735B1 EP87106403A EP87106403A EP0245735B1 EP 0245735 B1 EP0245735 B1 EP 0245735B1 EP 87106403 A EP87106403 A EP 87106403A EP 87106403 A EP87106403 A EP 87106403A EP 0245735 B1 EP0245735 B1 EP 0245735B1
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- European Patent Office
- Prior art keywords
- lamp
- electrode
- heating
- heating electrode
- power
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims 2
- 238000010438 heat treatment Methods 0.000 claims description 29
- 229910001507 metal halide Inorganic materials 0.000 claims description 15
- 150000005309 metal halides Chemical class 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims 2
- 230000004907 flux Effects 0.000 description 9
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 208000025962 Crush injury Diseases 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
- H01J61/827—Metal halide arc lamps
Definitions
- a metal halide high-pressure discharge lamp is known (US-A-3 519 872) in which a fine tungsten heating coil is arranged in series with the main electrode, the free ends of the electrode and the heating coil each being connected to a power supply which is electrically insulated are guided from one another by a crushing or melting of a discharge vessel.
- a fine tungsten heating coil is arranged in series with the main electrode, the free ends of the electrode and the heating coil each being connected to a power supply which is electrically insulated are guided from one another by a crushing or melting of a discharge vessel.
- a metal halide high-pressure discharge lamp is disclosed in US Pat. No. 3,356,884, which has two heating electrodes, each with two current leads, which are each connected to a separate sealing film.
- the respective heating electrode itself consists of a single-helix, U-shaped electrode coil with a small integrated, double-coil area, the electrode coil containing an electron emitter. This heating electrode serves to reduce the ignition voltage of the discharge lamp.
- a relatively high-wattage (400 W) metal halide high-pressure discharge lamp is known from US Pat. No. 3,937,996, in which the discharge vessel is enclosed by an outer bulb.
- the electrodes of this lamp are designed in the form of a loop, the two ends of these loops being fastened to a single sealing film with only one power supply. This means that these electrodes cannot be heated by an externally applied voltage.
- EP-A-0 175 937 describes an ignition device for a low-wattage (35 watt) high-pressure sodium discharge lamp.
- This ignition device consists of a helically wound wire around the cylindrical discharge vessel, which is electrically conductively connected to a power supply by a bimetal switch. This helical wire serves as an ignition aid.
- the object of the present application is to significantly shorten the start-up time of metal halide high-pressure discharge lamps, in particular with small outputs, until the useful luminous flux is reached.
- Metal halide high pressure discharge lamps have recently been used increasingly for general lighting purposes. Furthermore, such lamps have also been proposed for the headlights of motor vehicles. Small power levels of less than 50 W are used for both applications. In addition, there is an increased need for high lighting comfort with regard to the color properties and the rapid start-up of such lamps for both applications. Since the discharge vessel of these low-watt lamps only has an extremely small volume of approx. 0.03 cm3, no heating coil can be accommodated there, as is the case with lamps with high power consumption. With a design of the electrode according to the invention, however, such lamps can be started up quickly. The use of a hairpin-shaped and uncoiled wire made of tungsten requires little more space than a conventional electrode for this type of lamp.
- the meltdown is large enough to accommodate two power supplies isolated from each other, the heating current flowing through the power supplies connected in series with the electrode during preheating, and after the lamp is ignited, both power supplies are connected in parallel and transmit the operating current.
- a metal halide high-pressure discharge lamp preheated in this way, the 30% luminous flux is achieved approximately 5 times, the 50% luminous flux approximately 4 times and the 90% luminous flux approximately 2.5 times faster than with a cold-ignited lamp.
- both electrodes of the high-pressure discharge lamp are designed as heating electrodes according to the invention, even faster start-up values can be achieved realize.
- a discharge vessel with a larger mass and thus a correspondingly greater electrical power can also be used.
- the discharge space 8 has a volume of approximately 0.03 cm3.
- the arch of the hairpin-shaped heating electrode 16 projects approximately 2.5 mm into the discharge space 8.
- the heating electrode 16 itself consists of an uncoiled wire made of tungsten with a diameter of approximately 150 ⁇ m.
- the distance between the electrodes 9 and 16 is approximately 4.5 mm.
- the discharge vessel 2 contains about 1 mg of mercury as a filling and the halides of sodium, thallium and tin with a total amount of about 0.3 mg.
- Argon is introduced as the starting gas.
- the operating pressure of the lamp is approx. 40 bar.
- the heating electrode 16 is heated via the power supply lines 12 and 13 at a voltage of approximately 2.8 V and a current of approximately 5.5 A in the non-burning state of the lamp, so that the discharge vessel 2 is constantly kept at temperature and the Filling components have evaporated.
- approximately 16 kV are required, which are supplied to the spherical electrode 9 via the power supply 6.
- the heating circuit for the hairpin-shaped electrode 16 is interrupted.
- the operating current of approx. 0.35 A is now conducted via the power supply lines 12 and 13 connected in parallel. With a burning voltage of approx. 100 V, the lamp has an electrical output of approx. 35 W.
- FIGS. 2 and 3 A comparison of the starting speed of a conventionally (FIG. 2) and a metal halide high-pressure discharge lamp operated according to the invention (FIG. 3) is shown in FIGS. 2 and 3.
- the diagrams show that the preheated lamp is already 30% after approx. 2.3 seconds (corresponds to the luminous flux ⁇ of approx. 1000 lm of a conventional H4 incandescent lamp), 50% after approx. 3.7 seconds and after 11.9 Seconds has reached 90% of its final luminous flux of approx. 2,650 lm.
- the values of an unheated lamp 30% luminous flux at approx. 11.8 seconds, 50% at approx. 14.6 seconds and 90% at approx. 28.7 seconds.
- the color temperature of the lamp with the specified filling is approx. 3,600 K.
Landscapes
- Discharge Lamp (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
Es ist eine Metallhalogenidhochdruckentladungslampe bekannt (US-A- 3 519 872), bei der in Serie zur Hauptelektrode eine feine Heizwendel aus Wolfram angeordnet ist, wobei die jeweils freien Enden der Elektrode und der Heizwendel mit je einer Stromzuführung verbunden sind, die elektrisch-isoliert voneinander durch eine Quetschung oder Einschmelzung eines Entladungsgefäßes geführt sind. Mit einer derartigen Anordnung wird eine Verbesserung der Zündeigenschaften der Lampe erreicht, indem die von der Heizwendel entwickelte Wärme die Elektrode erwärmt, wodurch Füllungskondensate, die sich möglicherweise auf der Elektrode niedergesetzt haben, verdampfen. Die feine Heizwendel ist bei Lampen mit höherer Leistung jedoch nicht imstande, das gesamte Entladungsgefäß zu erwärmen, so daß sich außer der Zünderleichterung und der infolgedessen schnelleren Stabilisierung der Entladung keine weiteren Vorteile erzielen lassen.A metal halide high-pressure discharge lamp is known (US-A-3 519 872) in which a fine tungsten heating coil is arranged in series with the main electrode, the free ends of the electrode and the heating coil each being connected to a power supply which is electrically insulated are guided from one another by a crushing or melting of a discharge vessel. With such an arrangement, an improvement in the ignition properties of the lamp is achieved in that the heat developed by the heating coil heats up the electrode, as a result of which filling condensates, which may have settled on the electrode, evaporate. However, the fine heating coil is not able to heat the entire discharge vessel in lamps with a higher output, so that no further advantages can be achieved apart from the ease of ignition and the consequent faster stabilization of the discharge.
Ferner ist in der US-A- 3 356 884 eine Metallhalogenidhochdruckentladungslampe offenbart, die zwei Heizelektroden mit je zwei Stromzuführungen besitzt, die mit jeweils einer separaten Dichtungsfolie verbunden sind.Furthermore, a metal halide high-pressure discharge lamp is disclosed in US Pat. No. 3,356,884, which has two heating electrodes, each with two current leads, which are each connected to a separate sealing film.
Die jeweilige Heizelektrode selbst besteht aus einer einfach gewendelten, U-förmig gebogenen Elektrodenwendel mit einem kleinen integrierten, doppelt gewendelten Bereich, wobei die Elektrodenwendel einen Elektronenemitter enthält. Diese Heizelektrode dient zur Verringerung der Zündspannung der Entladungslampe.The respective heating electrode itself consists of a single-helix, U-shaped electrode coil with a small integrated, double-coil area, the electrode coil containing an electron emitter. This heating electrode serves to reduce the ignition voltage of the discharge lamp.
Aus der US-A- 3 937 996 ist eine relativ hochwattige (400 W) Metallhalogenidhochdruckentladungslampe bekannt, bei der das Entladungsgefäß von einem Außenkolben umschlossen wird. Die Elektroden dieser Lampe sind schlaufenartig ausgebildet, wobei die beiden Enden dieser Schlaufen an einer einzigen Dichtungsfolie mit nur einer Stromzuführung befestigt sind. Damit sind diese Elektroden nicht durch eine von außen angelegte Spannung heizbar.A relatively high-wattage (400 W) metal halide high-pressure discharge lamp is known from US Pat. No. 3,937,996, in which the discharge vessel is enclosed by an outer bulb. The electrodes of this lamp are designed in the form of a loop, the two ends of these loops being fastened to a single sealing film with only one power supply. This means that these electrodes cannot be heated by an externally applied voltage.
In der EP-A- 0 175 937 ist eine Zündvorrichtung für eine niederwattige (35 Watt) Natriumhochdruckentladungslampe beschrieben. Diese Zündvorrichtung besteht aus einem schraubenlinienförmig um das zylindrische Entladungsgefäß gewundenen Draht, der durch einen Bimetallschalter mit einer Stromzuführung elektrisch leitend verbunden ist. Dieser helixartige Draht dient als Zündhilfe.EP-A-0 175 937 describes an ignition device for a low-wattage (35 watt) high-pressure sodium discharge lamp. This ignition device consists of a helically wound wire around the cylindrical discharge vessel, which is electrically conductively connected to a power supply by a bimetal switch. This helical wire serves as an ignition aid.
Aus der EP-A- 0 017 281 ist eine Metallhalogenidhochdruckentladungslampe mit U- oder V-förmig ausgebildeten Elektrodenwendeln bekannt. Diese Elektroden können nicht durch einen Heizstrom vorgeheizt werden, da jeweils beide Schenkel einer U-förmigen Elektrode mit derselben Stromzuführung verbunden sind. Ein Aufheizen der Elektroden ist nur mit Hilfe des Entladungsbogens zwischen den beiden Elektroden möglich.From EP-A-0 017 281 a metal halide high-pressure discharge lamp with U or V-shaped electrode filaments is known. These electrodes cannot be preheated by a heating current, since both legs of a U-shaped electrode are connected to the same power supply. The electrodes can only be heated using the discharge arc between the two electrodes.
Der vorliegenden Anmeldung liegt die Aufgabe zugrunde, die Anlaufzeit von Metallhalogenidhochdruckentladungslampen mit insbesondere kleinen Leistungen bis zum Erreichen des Nutzlichtstromes wesentlich zu verkürzen.The object of the present application is to significantly shorten the start-up time of metal halide high-pressure discharge lamps, in particular with small outputs, until the useful luminous flux is reached.
Metallhalogenidhochdruckentladungslampen werden in letzter Zeit vermehrt zum Zwecke der Allgemeinbeleuchtung verwendet. Des weiteren wurden solche Lampen auch schon für die Scheinwerfer von Kraftfahrzeugen vorgeschlagen. Für beide Anwendungszwecke werden kleine Leistungsstufen von weniger als 50 W eingesetzt. Außerdem besteht für beide Anwendungszwecke ein gesteigertes Bedürfnis nach hohem Lichtkomfort hinsichtlich der Farbeigenschaften sowie des schnellen Anlaufs solcher Lampen. Da das Entladungsgefäß dieser niederwattigen Lampen nur ein äußerst kleines Volumen von ca. 0,03 cm³ aufweist, kann dort keine Heizwendel untergebracht werden, wie es bei Lampen mit hoher Leistungsaufnahme durchgeführt wird. Mit einer Gestaltung der Elektrode nach der Erfindung wird jedoch ein schneller Anlauf solcher Lampen möglich. Die Verwendung eines haarnadelförmig gebogenen und ungewendelten Drahtes aus Wolfram benötigt kaum mehr Raum als eine herkömmliche Elektrode für diese Art Lampen. Die Einschmelzung ist groß genug, auch zwei Stromzuführungen isoliert voneinander aufzunehmen, wobei während des Vorheizens durch die mit der Elektrode in Reihe geschalteten Stromzuführungen der Heizstrom fließt und nach dem Zünden der Lampe beide Stromzuführungen parallelgeschaltet werden und den Betriebsstrom übertragen. Mit einer auf diese Weise vorgeheizten Metallhalogenidhochdruckentladungslampe wird der 30 %-Lichtstrom ca. 5mal, der 50 %-Lichtstrom ca. 4mal und der 90 %-Lichtstrom ca. 2,5mal schneller erreicht als bei einer kalt gezündeten Lampe. Wenn beide Elektroden der Hochdruckentladungslampe als Heizelektroden entsprechend der Erfindung ausgeführt sind, lassen sich noch schnellere Anlaufwerte verwirklichen. Es kann aber auch ein Entladungsgefäß mit einer größeren Masse und damit einer entsprechend größeren elektrischen Leistung verwendet werden.Metal halide high pressure discharge lamps have recently been used increasingly for general lighting purposes. Furthermore, such lamps have also been proposed for the headlights of motor vehicles. Small power levels of less than 50 W are used for both applications. In addition, there is an increased need for high lighting comfort with regard to the color properties and the rapid start-up of such lamps for both applications. Since the discharge vessel of these low-watt lamps only has an extremely small volume of approx. 0.03 cm³, no heating coil can be accommodated there, as is the case with lamps with high power consumption. With a design of the electrode according to the invention, however, such lamps can be started up quickly. The use of a hairpin-shaped and uncoiled wire made of tungsten requires little more space than a conventional electrode for this type of lamp. The meltdown is large enough to accommodate two power supplies isolated from each other, the heating current flowing through the power supplies connected in series with the electrode during preheating, and after the lamp is ignited, both power supplies are connected in parallel and transmit the operating current. With a metal halide high-pressure discharge lamp preheated in this way, the 30% luminous flux is achieved approximately 5 times, the 50% luminous flux approximately 4 times and the 90% luminous flux approximately 2.5 times faster than with a cold-ignited lamp. If both electrodes of the high-pressure discharge lamp are designed as heating electrodes according to the invention, even faster start-up values can be achieved realize. However, a discharge vessel with a larger mass and thus a correspondingly greater electrical power can also be used.
Die Erfindung wird nachstehend anhand einer schematischen Zeichnung und zwei Diagrammen näher erläutert.
- Figur 1
- zeigt eine Metallhalogenidhochdruckentladungslampe niedriger Leistung mit der erfindungsgemäßen Elektrode in schematischer Darstellung
Figur 2- zeigt den Anstieg des Lichtstromes in relativen Einheiten von einer kalt gezündeten Metallhalogenidhochdruckentladungslampe
Figur 3- zeigt den Anstieg des Lichtstroms in relativen Einheiten von einer erfindungsgemäßen, warm gezündeten Metallhalogenidhochdruckentladungslampe
- Figure 1
- shows a metal halide high-pressure discharge lamp with low power with the electrode according to the invention in a schematic representation
- Figure 2
- shows the increase in luminous flux in relative units from a cold ignited high pressure metal halide discharge lamp
- Figure 3
- shows the increase in luminous flux in relative units from a hot-ignited metal halide high-pressure discharge lamp according to the invention
Der Entladungsraum 8 weist ein Volumen von ca. 0,03 cm³ auf. Der Bogen der haarnadelförmigen Heizelektrode 16 ragt etwa 2,5 mm in den Entladungsraum 8 hinein. Die Heizelektrode 16 selbst besteht aus einem ungewendelten Draht aus Wolfram mit ca. 150 µm Durchmesser. Der Abstand zwischen den Elektroden 9 und 16 beträgt ca. 4,5 mm. Das Entladungsgefäß 2 enthält als Füllung ca. 1 mg Quecksilber sowie die Halogenide von Natrium, Thallium und Zinn mit einer Gesamtmenge von ca. 0,3 mg. Als Startgas wird Argon eingefüllt. Der Betriebsdruck der Lampe liegt bei ca. 40 bar.The
Die Heizelektrode 16 wird über die Stromzuführungen 12 und 13 bei einer Spannung von ca. 2,8 V und einem Strom von ca. 5,5 A im nicht brennenden Zustand der Lampe beheizt, so daß das Entladungsgefäß 2 ständig auf Temperatur gehalten wird und die Füllungsbestandteile verdampft sind. Zur Zündung der Lampe 1 werden ca. 16 kV benötigt, die der kugelförmigen Elektrode 9 über die Stromzuführung 6 zugeführt werden. Nach erfolgter Lampenzündung wird der Heizstromkreis für die haarnadelförmige Elektrode 16 unterbrochen. Der Betriebsstrom von ca. 0,35 A wird jetzt über die parallelgeschalteten Stromzuführungen 12 und 13 geleitet. Bei einer Brennsprannung von ca. 100 V hat die Lampe eine elektrische Leistung von ca. 35 W.The
In den Figuren 2 und 3 ist ein Vergleich der Anlaufgeschwindigkeit einer konventionell (Fig. 2) und einer erfindungsgemäß (Fig. 3) betriebenen Metallhalogenidhochdruckentladungslampe wiedergegeben. Den Diagrammen ist entnehmbar, daß die vorgeheizte Lampe schon nach ca. 2,3 Sekunden 30 % (entspricht dem Lichtstrom φ von ca. 1000 lm einer konventionellen H4-Glühlampe), nach ca. 3,7 Sekunden 50 % und nach 11,9 Sekunden 90% ihres Endlichtstromes von ca. 2 650 lm erreicht hat. Zum Vergleich die Werte einer unbeheizten Lampe: 30 % Lichtstrom bei ca. 11,8 Sekunden, 50 % bei ca. 14,6 Sekunden und 90 % bei ca. 28,7 Sekunden. Die Farbtemperatur der Lampe mit der angegebenen Füllung beträgt ca. 3 600 K.A comparison of the starting speed of a conventionally (FIG. 2) and a metal halide high-pressure discharge lamp operated according to the invention (FIG. 3) is shown in FIGS. 2 and 3. The diagrams show that the preheated lamp is already 30% after approx. 2.3 seconds (corresponds to the luminous flux φ of approx. 1000 lm of a conventional H4 incandescent lamp), 50% after approx. 3.7 seconds and after 11.9 Seconds has reached 90% of its final luminous flux of approx. 2,650 lm. For comparison, the values of an unheated lamp: 30% luminous flux at approx. 11.8 seconds, 50% at approx. 14.6 seconds and 90% at approx. 28.7 seconds. The color temperature of the lamp with the specified filling is approx. 3,600 K.
Claims (3)
- Metal halide high-pressure discharge lamp with an electrical power consumption of less than 50 W, consisting of a discharge vessel (2), two pressings or fusings (3, 4) arranged on the latter at opposite sides, through which power feeds (6; 12, 13) are carried in a gas-tight manner into the discharge vessel (2), and two electrodes (9, 16) arranged within the discharge vessel (2) and connected to the power feeds (7; 14, 15), in which at least one electrode is constructed as direct heating electrode (16) having two legs used as power feeds (14, 15), the heating electrode (16) for preheating the discharge vessel by means of a heating voltage applied from the outside to the two power feeds (14, 15) of the heating electrode before the ignition of the lamp consists of an uncoiled tungsten wire without coiled electrode parts and exhibits a hairpin-shaped form, and each leg (14, 15) of the heating electrode (16) is connected via sealing foils (10, 11) with one separate power feed (12, 13) each, which are conducted electrically mutually insulated through a pressing or fusing (4).
- Metal halide high-pressure discharge lamp according to Claim 1, characterised in that both electrodes of the lamp (1) are in each case constructed as heating electrode (16) having two legs used as power feeds (14, 15) for preheating the discharge vessel by means of a heating voltage applied from the outside to the two power feeds (14, 15) of the heating electrode before the ignition of the lamp and having a hairpin-shaped form and consist of an uncoiled tungsten wire.
- Method for operating a metal halide high-pressure discharge lamp according to Claim 1, characterised in thata) for preheating the discharge vessel (2) before the ignition of the lamp, a heating voltage is applied between the power feeds (12, 13) which are electrically conductively connected to the legs (14, 15) of the heating electrode (16) via in each case one sealing foil (10, 11),b) for igniting the lamp, a high voltage is applied to the power feed (6) which is electrically conductively connected to the electrode (9) opposite to the heating electrode (16),c) during lamp operation, the power feeds (12, 13), which are electrically conductively connected to the heating electrode (16), are connected in parallel with one another and the lamp running voltage being applied between these power feeds (12, 13) and the power feed (6) which is electrically conductively connected to the electrode (9) opposite to the heating electrode (16).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3616192 | 1986-05-14 | ||
| DE19863616192 DE3616192A1 (en) | 1986-05-14 | 1986-05-14 | HIGH PRESSURE DISCHARGE LAMP AND METHOD FOR OPERATING THE HIGH PRESSURE DISCHARGE LAMP |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0245735A2 EP0245735A2 (en) | 1987-11-19 |
| EP0245735A3 EP0245735A3 (en) | 1989-11-02 |
| EP0245735B1 true EP0245735B1 (en) | 1993-02-10 |
Family
ID=6300789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87106403A Expired - Lifetime EP0245735B1 (en) | 1986-05-14 | 1987-05-04 | High-pressure discharge lamp, and method of operating the high-pressure discharge lamp |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4779026A (en) |
| EP (1) | EP0245735B1 (en) |
| JP (1) | JPS62272451A (en) |
| DE (2) | DE3616192A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060255741A1 (en) * | 1997-06-06 | 2006-11-16 | Harison Toshiba Lighting Corporation | Lightening device for metal halide discharge lamp |
| JP4297227B2 (en) * | 1998-07-24 | 2009-07-15 | ハリソン東芝ライティング株式会社 | High pressure discharge lamp and lighting device |
| US6501231B1 (en) | 2001-07-09 | 2002-12-31 | Amglo Kemlite Laboratories, Inc. | Metal halide lightbulb strobe system |
| GB2423862A (en) * | 2005-03-04 | 2006-09-06 | Heraeus Noblelight Ltd | High-pressure discharge lamp having constructional details for reducing devitrification of glass |
| US8754576B2 (en) | 2012-09-28 | 2014-06-17 | Elwha Llc | Low pressure lamp using non-mercury materials |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3937996A (en) * | 1974-10-07 | 1976-02-10 | General Electric Company | Metal halide lamp using loop electrodes |
| EP0175937A2 (en) * | 1984-08-24 | 1986-04-02 | GTE Products Corporation | Metal vapor lamp having low starting voltage |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1854793A (en) * | 1930-03-31 | 1932-04-19 | Chain Store Products Corp | Hairpin |
| US3356884A (en) * | 1964-06-30 | 1967-12-05 | Westinghouse Electric Corp | Electrode starting arrangement having a coiled heating element connected to the retroverted portion of the electrode |
| US3519872A (en) * | 1967-05-17 | 1970-07-07 | Westinghouse Electric Corp | Thermionic electrode with an auxiliary starting coil for a discharge lamp |
| NL7902574A (en) * | 1979-04-03 | 1980-10-07 | Philips Nv | HIGH PRESSURE DISCHARGE LAMP. |
| NL7909332A (en) * | 1979-12-28 | 1981-07-16 | Philips Nv | LAMP FITTED WITH A GLASS LAMP VESSEL AND GLASS SUITABLE FOR IT. |
-
1986
- 1986-05-14 DE DE19863616192 patent/DE3616192A1/en not_active Withdrawn
-
1987
- 1987-04-17 US US07/039,662 patent/US4779026A/en not_active Expired - Fee Related
- 1987-05-04 EP EP87106403A patent/EP0245735B1/en not_active Expired - Lifetime
- 1987-05-04 DE DE8787106403T patent/DE3784094D1/en not_active Expired - Fee Related
- 1987-05-14 JP JP62116066A patent/JPS62272451A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3937996A (en) * | 1974-10-07 | 1976-02-10 | General Electric Company | Metal halide lamp using loop electrodes |
| EP0175937A2 (en) * | 1984-08-24 | 1986-04-02 | GTE Products Corporation | Metal vapor lamp having low starting voltage |
Also Published As
| Publication number | Publication date |
|---|---|
| US4779026A (en) | 1988-10-18 |
| DE3616192A1 (en) | 1987-11-19 |
| JPS62272451A (en) | 1987-11-26 |
| EP0245735A2 (en) | 1987-11-19 |
| DE3784094D1 (en) | 1993-03-25 |
| EP0245735A3 (en) | 1989-11-02 |
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