EP0215524B1 - Hochdruckquecksilberdampfentladungslampe - Google Patents

Hochdruckquecksilberdampfentladungslampe Download PDF

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Publication number
EP0215524B1
EP0215524B1 EP86201561A EP86201561A EP0215524B1 EP 0215524 B1 EP0215524 B1 EP 0215524B1 EP 86201561 A EP86201561 A EP 86201561A EP 86201561 A EP86201561 A EP 86201561A EP 0215524 B1 EP0215524 B1 EP 0215524B1
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EP
European Patent Office
Prior art keywords
halide
discharge vessel
lamp
discharge
value
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
Application number
EP86201561A
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English (en)
French (fr)
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EP0215524A1 (de
Inventor
Charles Cornelis Eduard Meulemans
Marc François Rosalia Janssen
Antonius Cornelis Van Amstel
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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Publication date
Application filed by Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Priority to AT86201561T priority Critical patent/ATE45056T1/de
Publication of EP0215524A1 publication Critical patent/EP0215524A1/de
Application granted granted Critical
Publication of EP0215524B1 publication Critical patent/EP0215524B1/de
Expired legal-status Critical Current

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    • 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
    • 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

Definitions

  • the invention relates to a high-pressure mercury vapour discharge lamp having a given power consumption during operation, provided with a discharge vessel having a wall of gas-tight, radiation transmitting ceramic material, said discharge vessel enveloping a discharge space and being provided with an ionizable filling comprising a rare gas, mercury, sodium halide and thallium halide, an electrode being disposed within said discharge vessel in the proximity of each of two end wall parts, the electrode tips facing each other being located at a mutual distance EA.
  • a lamp of this type is known, for example, from United States Patent Specification 3,363,133 showing a discharge vessel of ceramic material, namely densely sintered polycrystalline aluminium oxide.
  • the known lamp comprises one or more metals such as thallium and furthermore it may comprise an alkali metal, for example, sodium.
  • metal halides in most cases metal iodides, to the ionisable filling of a high-pressure mercury vapour discharge lamp is a step that has been used for quite some time in lamps having a quartz glass discharge vessel. Its object is to obtain a higher density of metal atoms in the discharge space by utilizing the greater volatility of the metal halides as compared with that of the metals themselves, and hence a greater contribution of the metals to the radiation emitted by the lamp. This results in an improvement of the relative luminous flux and particularly also the colour rendition of the lamp. Alkali metals such as sodium and lithium are used in a halide form because these metals themselves are too aggressive relative to the quartz glass wall of the discharge vessel.
  • the halide pressure is determined by the temperature of the coldest spotTkp within the discharge vessel.
  • the maximum admissible value of T k p is limited by the material of the discharge vessel. In the case of quartz glass discharge vessels T kP may not be more than approximately 800°C. It has already been recognized at an early stage that the use of materials for the wall of the discharge vessel which can be subjected to a higher thermal load may lead to higher halide pressures. United States Patent Specification 3,234,421 already states the possibility of using densely sintered aluminium oxide as a material for the discharge vessel.
  • a halide filling which is frequently used in quartz glass lamps consists of the halides of thallium and sodium to which mostly indium halide is added.
  • an improvement is obtained concerning the relative luminous flux and also to a very slight extent the colour rendition if such a filling is used in a ceramic lamp vessel as stated in the above-mentioned United States Patent Specification 3,363,133.
  • Such a lamp has, however, some great drawbacks, so that its practical use is not very well possible.
  • the colour rendition is still insufficient for many uses and furthermore these lamps have among themselves a strong spread in their colour point and a variation thereof during their lifetime.
  • the colour point of these lamps is greatly dependent on variations in the power consumption of the lamp. These variations are the result of mains voltage variations that cannot be avoided in practice.
  • United States Patent Specification 3,334,261 mentions lamp fillings comprising halides of rare earth metals. It has been found that lamps having a satisfactory colour rendition are possible particularly with Dy, Ho, Er, Tm and/or La. A drawback of these lamps is that they have a high colour temperature (4000 K or higher). For practical uses a lower colour temperature is often very much desired. If the colour temperature in these lamps is to be decreased, the use of sodium halide is generally required which must be used in comparatively large quantities. This results in a great decrease of the contribution of the rare earth metals to the radiation emitted by the lamp so that the colour rendition of the lamp is adversely affected.
  • a lamp of the type described in the opening paragraph is characterized in that the wall load, defined as the quotient of power consumption and outer surface area of the part of the wall of the discharge vessel located between the electrode tips, has a value of at least 25 W/cm 2 , in that the ratio between the effective internal diameter ID of the discharge vessel and EA has a value of the range of 0.4 ⁇ ID/EA ⁇ 0.9, ID being defined as the square root of the quotient of the volume of the discharge space between the electrode tips and EA, and in that the ratio between the largest internal diameter 0 of the discharge vessel and EA is at most equal to 1.1.
  • the invention is based on the recognition of the fact that a satisfactory colour rendition is possible when sodium halide is used in the filling of a lamp if during operation of the lamp there is a strong broadening and reversal of the emission of the sodium in the Na-D lines which are located at 589.0 and 589.6 nm at very low partial Na-pressures.
  • broadening and reversal the Na-D lines assume the shape of emission bands, the short-wave band being shifted to shorter wavelengths and the long-wave band being shifted to longer wavelengths as the emission is more reversed.
  • a measure of the reversal is therefore the distance ⁇ in nm between the maximum values of the Na-emission bands.
  • the long-wave emission band of the Na is shifted to the red part of the spectrum, which is very favourable for the colour rendition properties. It has been found that a better colour rendition, that is to say, a higher value of the average colour rendering index R aB is obtained as ⁇ has a higher value.
  • the colour rendering index for deep red colours, R 9 which is often negative to deeply negative in discharge lamps may assume positive values in lamps according to the invention if ⁇ is relatively high. The value of ⁇ at which given colour rendition properties are obtained is still dependent on the lamp type and the lamp filling.
  • T k p are attained in a lamp according to the invention by dimensioning the discharge vessel for a given power consumption during operation in such a manner that the wall load has a value of at least 25 W/cm 2 .
  • the wall load is defined as the quotient of power consumption and surface area of the discharge vessel, considering only that part of the outer surface area of the discharge vessel that is located between the electrode tips.
  • the second condition which is to be fulfilled to obtain a sufficiently high ⁇ is that the actual discharge arc in the discharge vessel is to be surrounded with a sufficiently thick layer of Na-atoms in the fundamental state.
  • the discharge vessel must fulfil given geometrical requirements, notably a relatively wide discharge vessel is necessary.
  • ID is herein understood to mean the square root of the quotient of the volume of the discharge space between the electrode tips and EA.
  • the distance between the electrode tips and the adjacent end wall parts of the discharge vessel is not more than half the largest internal diameter 1 ⁇ 2( ⁇ i ). In that case the required high value of the temperature of the coldest spot in the lamp can more easily be attained, generally also without extra steps for heat insulation of the lamp extremities.
  • the lamps according to the invention have the advantage that for a given filling they have only a little spread in the colour point of the emitted radiation and also a very small variation of the colour point during their lifetime.
  • a great advantage of these lamps is that they do not substantially show any colour variation when varying the supplied power within fairly ample limits. It has been found that the effects of variations in the power counteract each other, in a sense, as a result of the relatively high sodium pressure and the lamp geometry used, so that a colour point stabilisation is obtained.
  • the mercury quantity is mainly determined by the arc voltage desired in the lamp.
  • the mercury quantity will frequently be relatively low for lamps having a high power (for example at least 1 mg per cm 3 of the discharge space at powers of the order of 2000 W) and will increase with a decreasing power (to, for example 100 mg per cm 3 at powers of the order of 10 W).
  • the filling of the lamps according to the invention comprises halides, preferably iodides, of sodium and of thallium.
  • the sodium halide is present in excess, that is to say, unevaporated sodium halide is still present during operation of the lamp.
  • the sodium halide quantity is generally at least 10 pmol per cm 3 of the discharge space (for lamps having a higher power) and assumes larger values as the power decreases (for example, to 500 ⁇ mol per cm 3 for the smallest lamps).
  • the thallium halide contributes in the form of the predominantly green thallium radiation so that white or substantially white light can be obtained in combination with the sodium radiation.
  • Lamps are preferred which are characterized in that the molar ratio between thallium halide and sodium halide is at least 0.05 and at most 0.25.
  • the lamps according to this preferred embodiment emit light at a comparative low colour temperature, which is very much desirable for certain uses (for example, lighting for the living room and decorative lighting).
  • the colour temperature is dependent on the TI:Na ratio chosen and has values of approximately 2500 K (colour point slightly below the line of the black radiators and having a slightly yellow colour aspect) to approximately 3000 K (colour point slightly above the line of the black radiators and having a slightly green colour aspect).
  • Lamps having a colour point which is substantially on the line of the black radiators have a colour temperature of approximately 2700 K.
  • a further advantageous embodiment of a lamp according to the invention is characterized in that the discharge vessel further comprises at least one halide of a metal radiating substantially in the blue or purple part of the spectrum, which halide, compared with sodium halide, has a high volatility and in which the molar ratio between this halide and the halides of Na and TI combined has a value of up to 0.1 at a maximum.
  • the use of blue or purple radiators provides the possibility of obtaining lamps having a higher colour temperature of the emitted radiation (higher than approximately 2700 K). To maintain satisfactory colour rendition properties, it is required for the halide of the blue or purple radiator to be used in relatively small quantities because otherwise the sodium halide is too much diluted so that ⁇ would be adversely affected.
  • volatile halides are chosen (saturated vapour pressure at 900°C at least a factor of 10 larger than that of sodium iodide) in which the molar ratio between these halides and the halide of Na and TI combined is not more than 0.1 and preferably of the order of 0.01. In this manner lamps can be obtained having a high efficiency, a satisfactory colour rendition and a colour temperature of up to approximately 3200 K. Lamps of this type are preferred which comprise at least one halide of at least one of the elements In, Sn and Cd because the best results are achieved with these halides.
  • a further preferred embodiment of a lamp according to the invention is characterized in that the discharge vessel also comprises at least one halide of at least one of the elements Sc, La and the lanthanides, in which the molar ratio between these halides and the halides of Na and TI combined has a value of at least 0.02.
  • the said elements Sc, La and the lanthanides have an emission consisting of many lines distributed over the entire spectrum with the centre generally being in the blue part of the spectrum so that these elements, if used only in a lamp, yield a colour point of the emitted radiation of >5000 K. Consequently, with the lamps of this embodiment as compared with the lamps comprising only Na and TI higher colour temperatures can be attained whilst maintaining high luminous fluxes and very satisfactory colour rendition properties.
  • Values of the molar ratio between the halides of Sc, La and/or lanthanide and the halides of Na and TI combined are then chosen to be at least 0.02 because then generally colour temperatures are attained of at least 3000 K. In fact, for colour temperatures of less than 3000 K the embodiments described hereinbefore with volatile, blue radiators are found to be more advantageous. In these lamps having a colour temperature of 3000 K or more the use of at least one halide of at least of one of the elements Dy, Tm, Ho Er and La is preferred. With Dy lamps can be obtained having very high values of R aB and Rg and with colour temperatures of up to approximately 3600 K.
  • the molar ratio between dysprosium halide and sodium and thallium halide is then preferably 0.03 or more.
  • Tm, Ho, Er and La it is possible to make lamps having colour temperatures of up to approximately 4500 K, where the molar ratio between the halides of these lanthanides and the sodium and thallium halide is preferably chosen to be 0.04 or more.
  • the drawing shows in a cross-section a high-pressure mercury vapour discharge lamp according to the invention, intended for a power consumption of 160 W.
  • the reference numeral 1 denotes the discharge vessel of a lamp according to the invention having a nominal power of 160 W.
  • the discharge vessel 1 has a cylindrical wall part 2 of densely sintered polycrystalline aluminium oxide having a total length of 19 mm, an external diameter of 8.45 mm and an internal diameter of 6.85 mm.
  • End wall parts 3, 4 and 5, 6, likewise of densely sintered aluminium oxide are sintered in a gas-tight manner to the respective ends of the part'2.
  • These end wall parts consists of discs 3 and 5 having a thickness of 2 mm and projecting tubes 4 and 6, respectively.
  • the projecting portion of the tubes 4, 6 has a length of 8 mm, an external diameter of 3 mm and an internal diameter of 2.05 mm.
  • Tungsten pins 7 and 8 having a diameter of 0.2 mm are sealed in the tubes 4, 6, respectively, together with aluminium oxide packing pieces 17 and 18, respectively with the aid of a halide-resistant melting glass denoted by the reference numerals 9 and 10, rspectively.
  • the ends of the pins 7, 8 located inside the discharge vessel 1 constitute electrodes 11 and 12, respectively, with the tips 13 and 14 facing each other and are provided with tungsten electrode filaments 15 and 16, respectively (2 layers, 5 turns each of wire having a diameter of 0.3 mm).
  • the distance EA between the tips 13 and 14 is 10 mm.
  • the effective internal diameter ID of the discharge vessel 1 is 6.07 mm.
  • the ratio ID/EA is therefore 0.6.
  • the distance between the electrode tips 13 and 14 and the end wall parts 3, 4 and 5, 6, respectively, is 2.5 mm.
  • the contents of the vessel 1 are 0.55 cm 3 .
  • the wall load of this lamp is 60 W/cm 2.
  • the discharge space within the vessel 1 contains an ionisable filling comprising mercury, argon as an ignition gas and halides.
  • the discharge vessel 1 of the lamp is generally built in an outer envelope (not shown in the drawing).
  • a lamp having a construction as shown in the drawing was provided with 12 mg of mercury (approximately 21.8 mg Hg per cm 3 contents of the discharge'vessel) and argon up to a pressure of 200 mbar.
  • a relative luminous flux of 93 Im/W was measured at a power consumption of 160 W.
  • Example 1 Nine lamps having the same construction as the lamp of Example 1 were provided with an iodide mixture which in addition to the iodides of Na and TI also contained an iodide of a blue radiator (indium, lanthanum or a lanthanide). Likewise as the lamp of Example 1 these lamps were provided with 12 mg of mercury, with the exception of Example 2 (10.1 mg Hg) and Example 9 (10 mg Hg).
  • Example 2 10.1 mg Hg
  • Example 9 (10 mg Hg).
  • Table states for each Example the total mass M of the iodide mixture, the blue radiator used and the molar ratio of the iodides. Furthermore the Table states for each lamp the results of measurements at a power consumption of 150 W.
  • a lamp having a construction as shown in the drawing, but intended for a power of 110 W was manufactured.
  • the ratio ID/EA was therefore 0.53.
  • the end wall parts consisted of a disc having a thickness of 3 mm and a projecting tube having an external diameter of 3 mm (length projecting portion 7 mm). The distance between the electrode tips and the respective end wall parts was 1.5 mm.
  • the contents of the discharge vessel were 0.20 cm 3 .
  • the wall load was 73 W/cm 2.
  • the end wall parts had a disc having a thickness of 3 mm and a projecting tube having an external diameter of 2 mm (length projecting portion 3 mm). The distance between electrode tip and end wall part was 1.25 mm.
  • the contents of the discharge vessel were 0.058 cm 3. At a power of 40 W the wall load was 82 W/cm 2 .
  • the lamps were provided with argon up to a pressure of 800 mbar, with mercury (Example 12:2.89 mg: Example 13: 3.63 mg), and with a mixture of iodides of Na, TI and In.
  • the following measurements were made at a power consumption of 40 W:

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  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Portable Outdoor Equipment (AREA)
  • Ladders (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Claims (7)

1. Hochdruckquecksilberdampfentladungslampe, geeignet für eine bestimmte im Betrieb aufgenommene Leistung, deren Entladungsgefäss mit einer Wand aus gasdichtem strahlungsdurchlässigem, keramischem Material einen Entladungsraum umschliesst und mit einer ionisierbaren Füllung versehen ist, die Edelgas Quecksilber, Natriumhalogenid und Thalliumhalogenid enthält, wobei in diesem Entladungsgefäss in der Nähe eines jeden von zwei Stirnwandteilen eine Elektrode angeordnet ist und die einander zugewandten Spitzen dieser Elektroden in einem Abstand EA auseinander liegen, dadurch gekennzeichnet, dass die Wandbelastung in der Definition als Quotient der aufgenommenen Leistung und der Aussenfläche des zwischen den Elektrodenspitzenliegenden Wandteils des Entladungsgefässes einen Wert von mindestens 25 W/cm2 hat, dass das Verhältnis des wirksamen Innendurchmessers ID des Entladungsgefässes zu EA einen Wert im Bereich von 0,4≤ID/EA≤0,9 hat, wobei ID die Wurzel aus dem Quotienten des Volumens des Entladungsraums zwischen den Elektrodenspitzen und EA darstellt, und wobei weiter gilt, dass das Verhältnis des grössten Innendurchmesser CPI des Entladungsgefässes zu EA höchstens gleich 1,1 ist.
2. Lampe nach Anspruch 1, dadurch gekennzeichnet, dass der Abstand der Elektrodenspitzen zu den benachbarten Stirnwandteilen des Entladungsgefässes höchstens Zy beträgt.
3. Lampe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Molarverhältnis des Thalliumhalogenids zum Natriumhalogenid mindestens 0,05 und höchstens 0,25 beträgt.
4. Lampe nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass das Entladungsgefäss weiter mindestens eim Halogenid eines im wesentlichen im blauen oder purpurnen Teil des Spektrums strahlenden Metalls enthält, wobei das Halogenid im Vergleich zum Natriumhalogenid eine grosse Flüchtigkeit hat und das Molarverhältnis dieses Halogenids zu den Halogeniden von Na und TI zusammen einen Wert bis zu höchstens 0,1 hat.
5. Lampe nach Anspruch 4, dadurch gekennzeichnet, dass das Entladungsgefäss mindestens ein Halogenid zumindest eines der Elemente In, Sn und Cd enthält.
6. Lampe nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass das Entladungsgefäss weiter mindestens ein Halogenid zumindest eines der Elemente Sc, La und der Lanthaniden enthält, wobei das Molverhältnis dieser Halogenide zu den Halogeniden von Na und TI zusammen einen Wert von mindestens 0,02 hat.
7. Lampe nach Anspruch 6, dadurch gekennzeichnet, dass das Entladungsgefäss mindestens ein Halogenid zumindest eines der Elemente Dy, Tm, Ho, Er und La enthält.
EP86201561A 1985-09-13 1986-09-10 Hochdruckquecksilberdampfentladungslampe Expired EP0215524B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86201561T ATE45056T1 (de) 1985-09-13 1986-09-10 Hochdruckquecksilberdampfentladungslampe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8502509 1985-09-13
NL8502509A NL8502509A (nl) 1985-09-13 1985-09-13 Hogedrukkwikdampontladingslamp.

Publications (2)

Publication Number Publication Date
EP0215524A1 EP0215524A1 (de) 1987-03-25
EP0215524B1 true EP0215524B1 (de) 1989-07-26

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EP86201561A Expired EP0215524B1 (de) 1985-09-13 1986-09-10 Hochdruckquecksilberdampfentladungslampe

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EP (1) EP0215524B1 (de)
JP (1) JPS6266556A (de)
CN (1) CN1008030B (de)
AT (1) ATE45056T1 (de)
AU (1) AU6258586A (de)
BR (1) BR8604319A (de)
CA (1) CA1263138A (de)
DD (1) DD249567A5 (de)
DE (1) DE3664701D1 (de)
ES (1) ES2005822A6 (de)
FI (1) FI863659A (de)
HU (1) HU194442B (de)
NL (1) NL8502509A (de)

Cited By (18)

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EP0286247A1 (de) * 1987-03-31 1988-10-12 THORN EMI plc Keramische Metallhalogenidlampen
EP0535311A1 (de) * 1991-09-30 1993-04-07 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe kleiner Leistung
US5239232A (en) * 1990-04-24 1993-08-24 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Light balance compensated mercury vapor and halogen high-pressure discharge lamp
US5698948A (en) * 1994-04-13 1997-12-16 U.S. Philips Corporation Metal halide lamp with ceramic discharge vessel and magnesium in the fill to improve lumen maintenance
US5751111A (en) * 1994-04-13 1998-05-12 U.S. Philips Corporation High-pressure metal halide lamp
EP0887841A2 (de) * 1997-06-27 1998-12-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Metallhalogenidlampe mit keramischem Entladungsgefäss
EP0905744A2 (de) * 1997-09-26 1999-03-31 Matsushita Electronics Corporation Metallhalogenid Lampe
US5923127A (en) * 1996-05-09 1999-07-13 U.S. Philips Corporation High-pressure discharge lamp with miniature discharge vessel and integrated circuitry
US6031332A (en) * 1997-04-09 2000-02-29 U.S. Philips Corporation Metal halide lamp having specific filling
US6137230A (en) * 1997-07-23 2000-10-24 U.S. Philips Corporation Metal halide lamp
US6147453A (en) * 1997-12-02 2000-11-14 U.S. Philips Corporation Metal-halide lamp with lithium and cerium iodide
US6208070B1 (en) 1997-12-26 2001-03-27 Matsushita Electronics Corporation Metal vapor discharged lamp with specific angle between electrodes and tapered envelope wall
US6362569B1 (en) 1997-04-25 2002-03-26 U.S. Philips Corporation High-pressure metal halide discharge lamp
US6362571B1 (en) 1998-04-08 2002-03-26 U.S. Philips Corporation Metal-halide lamp with ionizable filling and oxygen dispenser to avoid blackening and extend lamp life
US6650056B2 (en) 2001-12-21 2003-11-18 Koninklijke Philips Electronics N.V. Stabilizing short-term color temperature in a ceramic high intensity discharge lamp
US6737808B1 (en) * 1999-08-25 2004-05-18 Koninklijke Philips Electronics N.V. Metal halide lamp
US7211954B2 (en) 2005-03-09 2007-05-01 General Electric Company Discharge tubes
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CN1364307A (zh) * 1999-01-28 2002-08-14 皇家菲利浦电子有限公司 金属卤化物灯
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EP1193734A4 (de) * 2000-03-08 2006-06-28 Gs Yuasa Corp Elektrische entladungslampe
US7245081B2 (en) 2003-03-03 2007-07-17 Osram-Melco Toshiba Lighting Ltd. High-intensity discharge lamp with particular metal halide gas filling and lighting device
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EP1673798A2 (de) 2003-10-10 2006-06-28 Koninklijke Philips Electronics N.V. Hochdruck-entladungslampe
JP2008518391A (ja) * 2004-10-26 2008-05-29 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ メタルハライドランプ
GB2420220B (en) * 2004-11-10 2009-10-14 Gen Electric Ceramic metal halide lamps
US20090121636A1 (en) * 2005-04-08 2009-05-14 Koninklijke Philips Electronics, N.V. High-Pressure Discharge Lamp
JP2006310185A (ja) * 2005-04-28 2006-11-09 Osram Melco Toshiba Lighting Kk 金属蒸気放電ランプ
US7474057B2 (en) 2005-11-29 2009-01-06 General Electric Company High mercury density ceramic metal halide lamp
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JP5069493B2 (ja) * 2006-11-02 2012-11-07 ハリソン東芝ライティング株式会社 紫外線放電ランプ
US8564200B2 (en) 2006-12-01 2013-10-22 Koninklijke Philips N.V. Metal halide lamp
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JP5220096B2 (ja) 2007-04-20 2013-06-26 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ イオン化可能な塩の充填物を含むものであるメタルハライドランプ
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PL2476133T3 (pl) 2009-09-10 2017-02-28 Philips Lighting Holding B.V. Lampa wyładowcza o dużej intensywności
WO2011121492A2 (en) 2010-04-02 2011-10-06 Koninklijke Philips Electronics N.V. Metal halide lamp
WO2012153226A1 (en) 2011-05-06 2012-11-15 Koninklijke Philips Electronics N.V. Sealing compound and ceramic discharge vessel comprising such sealing compound
EP3120374A4 (de) * 2014-06-09 2017-11-29 Halliburton Energy Services, Inc. Quelle von optischen system zur elektromagentischen wolfram-halogen-strahlung
GB201809479D0 (en) * 2018-06-08 2018-07-25 Ceravision Ltd A plasma light source
GB201809481D0 (en) * 2018-06-08 2018-07-25 Ceravision Ltd A plasma light source

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NL7005294A (de) * 1970-04-13 1971-10-15
DE2114804B2 (de) * 1971-03-26 1978-09-14 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen Quecksilberdampf-Hochdruckentladungslampe mit Zusatz von Halogeniden der Seltenen Erden
NL184550C (nl) * 1982-12-01 1989-08-16 Philips Nv Gasontladingslamp.

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286247A1 (de) * 1987-03-31 1988-10-12 THORN EMI plc Keramische Metallhalogenidlampen
US5239232A (en) * 1990-04-24 1993-08-24 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Light balance compensated mercury vapor and halogen high-pressure discharge lamp
EP0535311A1 (de) * 1991-09-30 1993-04-07 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe kleiner Leistung
US5363007A (en) * 1991-09-30 1994-11-08 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Low-power, high-pressure discharge lamp, particularly for general service illumination use
US5698948A (en) * 1994-04-13 1997-12-16 U.S. Philips Corporation Metal halide lamp with ceramic discharge vessel and magnesium in the fill to improve lumen maintenance
US5751111A (en) * 1994-04-13 1998-05-12 U.S. Philips Corporation High-pressure metal halide lamp
US5923127A (en) * 1996-05-09 1999-07-13 U.S. Philips Corporation High-pressure discharge lamp with miniature discharge vessel and integrated circuitry
US6031332A (en) * 1997-04-09 2000-02-29 U.S. Philips Corporation Metal halide lamp having specific filling
US6362569B1 (en) 1997-04-25 2002-03-26 U.S. Philips Corporation High-pressure metal halide discharge lamp
EP0887841A2 (de) * 1997-06-27 1998-12-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Metallhalogenidlampe mit keramischem Entladungsgefäss
EP0887841A3 (de) * 1997-06-27 1999-10-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Metallhalogenidlampe mit keramischem Entladungsgefäss
US6075314A (en) * 1997-06-27 2000-06-13 Patent-Truehand-Gesellschaft Fuer Electriche Gluelampen Mbh Metal-halide lamp with specific lead through structure
US6137230A (en) * 1997-07-23 2000-10-24 U.S. Philips Corporation Metal halide lamp
US6137229A (en) * 1997-09-26 2000-10-24 Matsushita Electronics Corporation Metal halide lamp with specific dimension of the discharge tube
EP0905744A2 (de) * 1997-09-26 1999-03-31 Matsushita Electronics Corporation Metallhalogenid Lampe
US6147453A (en) * 1997-12-02 2000-11-14 U.S. Philips Corporation Metal-halide lamp with lithium and cerium iodide
US6525476B1 (en) 1997-12-02 2003-02-25 Koninklijke Philips Electronics N.V. Metal halide lamp with lithium and cerium iodide
US6208070B1 (en) 1997-12-26 2001-03-27 Matsushita Electronics Corporation Metal vapor discharged lamp with specific angle between electrodes and tapered envelope wall
US6362571B1 (en) 1998-04-08 2002-03-26 U.S. Philips Corporation Metal-halide lamp with ionizable filling and oxygen dispenser to avoid blackening and extend lamp life
US6737808B1 (en) * 1999-08-25 2004-05-18 Koninklijke Philips Electronics N.V. Metal halide lamp
US6650056B2 (en) 2001-12-21 2003-11-18 Koninklijke Philips Electronics N.V. Stabilizing short-term color temperature in a ceramic high intensity discharge lamp
US7211954B2 (en) 2005-03-09 2007-05-01 General Electric Company Discharge tubes
US7279838B2 (en) 2005-03-09 2007-10-09 General Electric Company Discharge tubes
US7327085B2 (en) 2005-03-09 2008-02-05 General Electric Company Discharge tubes

Also Published As

Publication number Publication date
HU194442B (en) 1988-01-28
CN1008030B (zh) 1990-05-16
FI863659A0 (fi) 1986-09-10
CN86106082A (zh) 1987-06-03
CA1263138A (en) 1989-11-21
DE3664701D1 (en) 1989-08-31
AU6258586A (en) 1987-03-19
ATE45056T1 (de) 1989-08-15
FI863659A (fi) 1987-03-14
JPS6266556A (ja) 1987-03-26
DD249567A5 (de) 1987-09-09
ES2005822A6 (es) 1989-04-01
BR8604319A (pt) 1987-05-05
HUT42203A (en) 1987-06-29
EP0215524A1 (de) 1987-03-25
NL8502509A (nl) 1987-04-01

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