EP0477668B1 - Lampe à décharge aux halogénures métalliques à haute pression - Google Patents

Lampe à décharge aux halogénures métalliques à haute pression Download PDF

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Publication number
EP0477668B1
EP0477668B1 EP91115371A EP91115371A EP0477668B1 EP 0477668 B1 EP0477668 B1 EP 0477668B1 EP 91115371 A EP91115371 A EP 91115371A EP 91115371 A EP91115371 A EP 91115371A EP 0477668 B1 EP0477668 B1 EP 0477668B1
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EP
European Patent Office
Prior art keywords
metal halide
discharge lamp
pressure metal
lamp
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.)
Expired - Lifetime
Application number
EP91115371A
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German (de)
English (en)
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EP0477668A1 (fr
Inventor
Andreas Dr. Genz
Walter Kiele
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
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Filing date
Publication date
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Publication of EP0477668A1 publication Critical patent/EP0477668A1/fr
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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
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
    • H01J61/20—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent mercury vapour

Definitions

  • the invention relates to a metal halide high-pressure discharge lamp according to the preamble of claim 1.
  • Metal halide high-pressure discharge lamps of this type are used in particular in lighting systems for stage, film and television, where light with a color temperature similar to daylight, high color temperature consistency and very good color rendering is required.
  • From DE-PS 19 40 539 and DE-PS 21 14 804 mercury vapor high-pressure discharge lamps with halide additions of dysprosium and / or holmium and / or thulium are known.
  • the lamps emit light with a spectral composition similar to daylight and a light color of approx. 6000 K.
  • a disadvantage is that these lamps, like most of the other high-pressure discharge lamps on the market, suffer a color temperature drop of 2 K and more per operating hour for this purpose.
  • the lamps therefore only meet the values required for color temperature for a relatively short operating time. After this time, the color temperature has dropped so far that it can no longer be used in film and television recordings.
  • the object of the invention is to provide a metal halide high-pressure discharge lamp which emits radiation with a color temperature of 5200 to 6400 K and in which the decrease in color temperature is significantly reduced over the entire average life.
  • the dysprosium of the halide filling By adding nickel to the dysprosium of the halide filling, a color temperature similar to daylight is achieved. Depending on the lamp geometry, it may be necessary to increase the color temperature for certain lamps in order to obtain the optimal value of 5600 K or 6000 K. This is made possible by the addition of gadolinium. Both nickel and gadolinium stabilize the color temperature of the lamp. With the addition of these two metals to the filling, the drop in color temperature in all of the relevant metal halide high-pressure discharge lamps with power consumption between 100 and 12000 W can be limited to a maximum of 1 K per operating hour over the entire average life of the lamps. This allows the user to operate used and new lamps side by side within the average life of the lamp without color temperature differences having a disruptive effect.
  • the discharge vessel contains 0.03 to 3 mg dysprosium, 0.002 to 0.5 mg nickel and possibly 0.002 to 0.1 mg gadolinium per cm3 of the vessel volume.
  • Iodine and bromine are advantageously used as halogens, in order to produce an optimally functioning halogen cycle the molar ratio of iodine to bromine should be between 0.2 and 1.5.
  • FIG. 1 shows a small, single-sided, metal halide high-pressure discharge lamp 1 with a power consumption of 130 W.
  • the discharge vessel 2 made of quartz glass has two diametrically opposed necks 3, 4, into each of which a power supply 5 with a molybdenum sealing film 6, 7 and one into it Discharge vessel 2 protruding pin electrode 8.9 made of tungsten are squeezed.
  • a base 10 with two contact elements 11, 12 is attached to a neck 4 by means of a suitable cement.
  • One contact element 11 is connected to the sealing film 7 via a power supply that is not visible here.
  • the other contact element 12 is an end of a holding bracket 13, the other end of which is electrically connected to the power supply 5 of the other electrode 8 and which at the same time holds the free neck 3 of the discharge vessel 2 takes over.
  • FIG. 2 shows a metal halide high-pressure discharge lamp 14 with a base on both sides, with a power consumption of 575 W.
  • the discharge vessel 15 made of quartz glass has an essentially spherical shape and has a neck 16, 17 at two diametrically opposite points. In each of these necks 16, 17, a pin electrode 18, 19 made of tungsten is melted in a gas-tight manner via a molybdenum sealing film 20, 21.
  • the sealing film 20, 21 is electrically connected to a base of the SFc 10-4 type, the base sleeve 22, 23 of which is attached to the free end of each neck 16, 17.
  • a threaded pin 24, 25 is welded onto the base sleeve 22, 23, and a knurled nut 26, 27 is in turn screwed onto this.
  • the electrical connection to the mains or ballast is established by connecting cables which are clamped between the base sleeve 22, 23 and the knurled nut 26, 27.
  • FIG. 3 shows a metal halide high-pressure discharge lamp 28 with a base on both sides, with a power consumption of 12000 W.
  • the discharge vessel 29 made of quartz glass has two lamp necks 30, 31, which are diametrically opposed.
  • the lamp 28 has two rod-shaped tungsten electrodes 32, 33, which are connected to the sleeves 36, 37 of the type K 25s base by means of vacuum-sealed molybdenum foils 34, 35 that have been melted into the lamp necks 30, 31.
  • the bases have connection cables 38, 39 which are connected to the power supply or the ballast.
  • the lamp data and the filling compositions for the metal halide high-pressure discharge lamps shown in FIGS. 1 to 3 are compiled in the table below.

Landscapes

  • Discharge Lamp (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Claims (5)

  1. Lampe (1,14,28) à décharge à haute intensité à halogénure métallique comportant une enceinte de décharge (2,15,29) en un matériau transparent et résistant aux hautes températures, deux électrodes (8,9;18,19;32,33) résistantes aux hautes températures et un remplissage formé de mercure, d'au moins un gaz rare, de césium ainsi que d'un halogénure de dysprosium, caractérisée par le fait que la lampe (1,14,28) contient en plus un halogénure de nickel, pour obtenir une température de couleur analogue à la lumière du jour, comprise entre environ 5600 K et 6000 K et pour réduire la chute de température de couleur au maximum à 1 K par heure de fonctionnement sur l'ensemble de la durée de vie moyenne de la lampe.
  2. Lampe (1,14,28) à décharge à haute intensité à halogénure métallique suivant la revendication 1, caractérisée par le fait que l'enceinte de décharge (2,15,29) contient du dysprosium en une quantité comprise entre 0,03 et 3,0 mg par cm³ du volume de l'enceinte.
  3. Lampe (1,14,28) à décharge à haute intensité à halogénure métallique suivant la revendication 1, caractérisée par le fait que l'enceinte de décharge (2,15,29) contient du nickel en une quantité comprise entre 0,002 et 0,5 mg par cm³ du volume de l'enceinte.
  4. Lampe (1,14,28) à décharge à haute intensité à halogénure métallique suivant la revendication 1, caractérisée par le fait que l'enceinte de décharge (2,15,29) contient, en tant qu'halogénes pour les composés d'halogénures, de l'iode et du brome dans un rapport molaire compris entre 0,2 et 1,5.
  5. Lampe ( 14,28) à décharge à haute intensité à halogénure métallique suivant la revendication 1, caractérisée par le fait que l'enceinte de décharge (15,29) contient en plus un halogénure de gadolinium, avec du gadolinium présent en une quantité comprise entre 0,002 et 0,1 mg par cm³ du volume de l'enceinte.
EP91115371A 1990-09-24 1991-09-11 Lampe à décharge aux halogénures métalliques à haute pression Expired - Lifetime EP0477668B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4030202A DE4030202A1 (de) 1990-09-24 1990-09-24 Metallhalogenid-hochdruckentladungslampe
DE4030202 1990-09-24

Publications (2)

Publication Number Publication Date
EP0477668A1 EP0477668A1 (fr) 1992-04-01
EP0477668B1 true EP0477668B1 (fr) 1995-04-19

Family

ID=6414870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91115371A Expired - Lifetime EP0477668B1 (fr) 1990-09-24 1991-09-11 Lampe à décharge aux halogénures métalliques à haute pression

Country Status (4)

Country Link
US (1) US5264760A (fr)
EP (1) EP0477668B1 (fr)
JP (1) JPH04249058A (fr)
DE (2) DE4030202A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06111769A (ja) * 1992-09-25 1994-04-22 Hamamatsu Photonics Kk メタルハライドランプ
US5479065A (en) * 1992-12-28 1995-12-26 Toshiba Lighting & Technology Corporation Metal halide discharge lamp suitable for an optical light source having a bromine to halogen ratio of 60-90%, a wall load substantially greater than 40 W/cm2, and a D.C. potential between the anode and cathode
DE69401394T2 (de) * 1993-07-13 1997-04-24 Matsushita Electric Ind Co Ltd Metall-Halogen Entladungslampe, optischer Beleuchtungsapparat und Bildvorführungssystem
US5451838A (en) * 1994-03-03 1995-09-19 Hamamatsu Photonics K.K. Metal halide lamp
DE19517516A1 (de) * 1995-05-12 1996-11-14 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Zweiseitig gesockelte elektrische Lampe mit bevorzugter Betriebslage und Fassung sowie Sockel und Sockelhülse für eine derartige Lampe
US5831388A (en) * 1995-08-23 1998-11-03 Patent-Truehand-Gesellschaftfuer Elektrische Gluelampen Mbh Rare earth metal halide lamp including niobium
US5942850A (en) * 1997-09-24 1999-08-24 Welch Allyn, Inc. Miniature projection lamp
DE102004019185A1 (de) 2004-04-16 2005-11-10 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
US7486026B2 (en) * 2006-11-09 2009-02-03 General Electric Company Discharge lamp with high color temperature

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566178A (en) * 1968-12-11 1971-02-23 Tokyo Shibaura Electric Co High pressure discharge lamp containing an inert gas,mercury,a halogen and tin
BE754499A (fr) * 1969-08-08 1971-01-18 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Lampe a decharge sous haute pression, a vapeur de mercure avec additif d'halogenure metallique
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
DE2725297C3 (de) * 1977-06-04 1980-10-16 Philips Patentverwaltung Gmbh, 2000 Hamburg Hochdruckquecksilberdampfentladungslampe
DE3427280C2 (de) * 1984-07-24 1986-06-12 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Metallhalogenid-Hochdruckentladungslampe
JPS61138447A (ja) * 1984-12-11 1986-06-25 Toshiba Corp メタルハライドランプ
NL191812C (nl) * 1987-09-04 1996-08-02 Philips Electronics Nv Hogedrukgasontladingslamp en armatuur voorzien van die lamp.
US4978884A (en) * 1988-05-19 1990-12-18 U.S. Phillips Corporation Metal halide discharge lamp having low color temperature and improved color rendition

Also Published As

Publication number Publication date
DE4030202A1 (de) 1992-03-26
JPH04249058A (ja) 1992-09-04
DE59105242D1 (de) 1995-05-24
US5264760A (en) 1993-11-23
EP0477668A1 (fr) 1992-04-01

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