EP0762475B1 - Lampe à décharge aux halogénures métalliques utilisée à des fins de projection - Google Patents

Lampe à décharge aux halogénures métalliques utilisée à des fins de projection Download PDF

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Publication number
EP0762475B1
EP0762475B1 EP96112969A EP96112969A EP0762475B1 EP 0762475 B1 EP0762475 B1 EP 0762475B1 EP 96112969 A EP96112969 A EP 96112969A EP 96112969 A EP96112969 A EP 96112969A EP 0762475 B1 EP0762475 B1 EP 0762475B1
Authority
EP
European Patent Office
Prior art keywords
μmol
discharge lamp
metal halide
metal
halide discharge
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
EP96112969A
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German (de)
English (en)
Other versions
EP0762475A1 (fr
Inventor
Andreas Dr. Genz
Hans-Werner Gölling
Joachim Dr. Dirks
Clemens Barthelmes
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
Priority claimed from DE19530821A external-priority patent/DE19530821A1/de
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0762475A1 publication Critical patent/EP0762475A1/fr
Application granted granted Critical
Publication of EP0762475B1 publication Critical patent/EP0762475B1/fr
Anticipated expiration legal-status Critical
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
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
    • 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
    • H01J61/125—Selection of substances for gas fillings; Specified operating pressure or temperature having an halogenide as principal component
    • 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

  • the invention relates to a metal halide discharge lamp according to the The preamble of claim 1 and the preamble of claim 6.
  • Metal halide discharge lamps of this type are mainly installed in optical reflectors or other optical imaging systems. Your area of application is, for example, projection or light guide technology for overhead, slide and cinema projection as well as especially for video projection or for endoscopy and boroscopy. Accordingly, very short arcs (typical arc lengths of at most a few mm) and maximum luminance (on average more than approx. 30 kcd / cm 2 ) at color temperatures of more than 4500 K and good color rendering are required for good imaging results. Typical power values are in the range between approx. 100 W and 600 W. In addition, the temporal constancy of the location of the discharge arc within the lamp vessel is of particular importance. When the arc is unstable, the discharge arc stochastically moves out of the focus of the lamp reflector and thus impairs the quality of the optical image.
  • FR-A-2130255 discloses a metal halide high-pressure discharge lamp with a wall load between 10 and 100 W / cm 2 and a specific arc power between 100 and 1000 W / cm.
  • the discharge vessel contains cesium iodide and bromides of rare earth metals, in particular of dysprosium (Dy), holmium (Ho) and thulium (Tm). Furthermore, the discharge vessel contains an excess of bromine which exceeds the stoichiometric ratio of the compounds bromine / rare earth metals.
  • WO 94/23441 is a metal halide discharge lamp for specific Arc power between 60 and 140 W per mm arc length with a Filling reveals that besides mercury (Hg) and an inert gas additionally halogen compounds of the elements cesium (Cs), dysprosium (Dy) and tantalum (Ta) contains.
  • Hg mercury
  • Cs cesium
  • Dy dysprosium
  • Ta tantalum
  • the invention has for its object to the disadvantage mentioned eliminate and create a metal halide discharge lamp that a Color temperature of more than 4500 K - with good color rendering - as well a slight unsteady bow even with very high specific bow outputs having.
  • the task formulated at the beginning can be also solve with a filling that - in contrast to the cited state of the art Technology - no Cs as a filling component.
  • Nb niobium
  • the Nb acts directly in the Electrode area on the arch base. Without any commitment to intend theoretical explanation it is believed that the Nb forms a mixed phase with the electrode material, which leads to arc stability contributes.
  • the filling of the discharge vessel of the metal halide discharge lamp according to the invention consists of the following filling components: Nb, a rare earth metal (SE), preferably Dy, Hg, an inert gas and one or more halogens, preferably iodine (I) and / or bromine (Br) to form metal halides.
  • SE rare earth metal
  • Hg a rare earth metal
  • I iodine
  • Br bromine
  • Dy can also be wholly or partly by another element the rare earths with comparable properties in gas discharge be replaced, e.g. by holmium (Ho).
  • Ho holmium
  • the typical filling quantity per cm 3 volume of the discharge vessel is for the rare earth metal (SE), in particular also for Dy, in the range between 0.3 ⁇ mol and 3 ⁇ mol and for Nb in the range between 0.3 ⁇ mol and 3 ⁇ mol, preferably in the range between 1 ⁇ mol and 1.5 ⁇ mol.
  • the filling pressure of the inert gas serving as the ignition gas for example argon (Ar) or xenon (Xe), is typically in the range between approximately 20 kPa and 60 kPa.
  • the amount of mercury is used to set the desired lamp arc voltage. It is typically in the range between approx. 5 mg and 15 mg per mm arc length for burning voltages between 30 V and 50 V.
  • the discharge vessel additionally contains up to approx. 3 ⁇ mol Cs per cm 3 vessel volume.
  • the filling quantity of the C is preferably in the range between 0.5 ⁇ mol and 2.5 ⁇ mol per cm 3 of vessel volume.
  • This filling system is particularly suitable for the highest requirements to the arc rest and life of the lamp as well as in particular specific power densities of approx. 200 W and more per mm arc length.
  • the Cs addition gives you a further degree of freedom for the lamp design. This degree of freedom can be, for example, for one Optimization of the electrode geometry with a view to a longer service life use.
  • the disadvantage is, however, that with increasing Cs content the light output decreases. In individual cases, one is for the concrete value of the Cs share therefore make a suitable compromise.
  • the lamp is advantageously combined with a reflector to form a structural unit, as described in DE-PS 28 40 031.
  • the lamp is approximate mounted axially in the reflector.
  • the reflector is e.g. dichroic coated.
  • Quartz glass or a transparent ceramic material, for example Al 2 O 3, is suitable as the material for the lamp bulb.
  • a discharge vessel which is closed on both sides is particularly suitable for the lamp.
  • Two electrodes face each other inside the discharge vessel.
  • the electrodes are each connected to a power supply that is gas-tight are led outside.
  • Typical values for the specific arc power are in the range between approximately 100 W and 200 W or more per mm arc length, in particular in the range between approximately 150 W and 200 W per mm arc length. Average luminance levels of typically more than 45 kcd / cm 2 are achieved.
  • the longitudinal section is one firmly connected to a reflector Metal halide discharge lamp 1 with a power of 270 W schematically shown.
  • the discharge vessel 2 made of quartz glass essentially has one spherical shape and points to two diametrically opposite Place one neck each in the pin-shaped tungsten electrodes 3 are melted by means of sealing foils 4 made of molybdenum.
  • the the discharge space opposite ends of the sealing foils 4 are supplied with power 5 welded, which in turn with electrical connections 6, 7 of Reflector base system are connected.
  • the reflector base system exists - Except for the electrical connections 6, 7- essentially the reflector 8 and a two-part ceramic base 9, 10.
  • For a more detailed Explanation of the reflector base system is on the DE-PS 28 40 031.
  • the internal volume of the discharge vessel 2 enclosing an ionizable filling is approximately 0.33 cm 3 .
  • the axially opposed electrodes 3 are 1.6 mm apart.
  • the filling in addition to 12 mg Hg and 45 kPa Ar as the base gas, the filling consists of the further filling constituents listed in Table 1 below in the amounts specified there.
  • the volume-related molar amounts of some filling components calculated from this are listed in Table 2 below.
  • the specific arc power and the operating voltage are approx. 167 W per mm arc length or approx. 35 V.
  • Table 3 shows the lighting values of the lamp achieved with this filling. Quantities of the components of the first filling example of the lamp. Nb 0.04 mg Dy 0.08 mg Ed 12 mg HgBr 2 0.7 mg HgI 2 0.68 mg Ar 45 kPa Volume-related molar amounts of some filling components from Table 1.
  • the filling in addition to 12 mg Hg and 45 kPa Ar as the base gas, the filling consists of the further filling components listed in Table 4 below in the amounts specified there.
  • the volume-related molar amounts of some filling components calculated from this are listed in Table 5 below.
  • the specific arc power and the operating voltage are approx. 167 W per mm arc length or approx. 35 V.
  • Table 6 shows the lighting values of the lamp achieved with this filling. Amount of components of the second filling example of the lamp.

Landscapes

  • Discharge Lamp (AREA)

Claims (12)

  1. Lampe (1) à décharge aux halogénures métalliques utilisée à des fins de projection, comprenant une enceinte (2) de décharge transparente à la lumière et dans laquelle se font face deux électrodes (3) qui sont reliées à des entrées (5) de courant menant à l'extérieur, l'enceinte (2) de décharge contenant une atmosphère ionisable constituée de mercure, d'au moins un gaz rare, d'au moins un halogène, d'un métal de terres rares (SE) ou éventuellement de deux métaux de terres rares ainsi que d'un autre métal pour la formation d'halogénures métalliques, caractérisée en ce que l'atmosphère comporte comme autre métal du niobium (Nb).
  2. Lampe à décharge aux halogénures métalliques suivant la revendication 1, caractérisée en ce que la quantité du niobium est comprise entre 0,3 µmole et 3 µmole par cm3 du volume de l'enceinte.
  3. Lampe à décharge aux halogénures métalliques suivant la revendication 2, caractérisée en ce que la quantité du niobium est comprise de préférence entre 1,0 µmole et 1,5 µmole par cm3 du volume de l'enceinte.
  4. Lampe à décharge aux halogénures métalliques suivant la revendication 1, caractérisée en ce que l'enceinte contient comme métal de terre rare du dysprosium (Dy), la quantité du dysprosium étant comprise entre 0,3 µmole et 3 µmole par cm3 du volume de l'enceinte.
  5. Lampe à décharge aux halogénures métalliques suivant la revendication 4, caractérisée en ce que le dysprosium est remplacé en tout ou partie par de l'holmium.
  6. Lampe à décharge aux halogénures métalliques suivant la revendication 1, caractérisée en ce que l'enceinte de décharge contient comme halogène pour les composés halogénures, de l'iode (I) et du brome (Br) en un rapport molaire de l'iode au brome compris entre 0,2 et 2.
  7. Lampe (1) de décharge aux halogénures métalliques utilisée à des fins de projection, comportant une enceinte (2) de décharge transparente à la lumière dans laquelle se font face deux électrodes (3) qui sont reliées à des entrées (5) de courant allant à l'extérieur, l'enceinte (2) de décharge contenant une atmosphère ionisable constituée de mercure (Hg), d'au moins un gaz rare, d'au moins un halogène, de césium (Cs) et d'un métal de terres rares (SE) ou facultativement de deux métaux de terres rares, ainsi que d'un autre métal pour la formation d'halogénures métalliques, caractérisée en ce que l'atmosphère contient comme autre métal du niobium (Nb).
  8. Lampe à décharge aux halogénures métalliques suivant la revendication 7, caractérisée en ce que la quantité du niobium est comprise entre 0,3 µmole et 3 µmole par cm3 du volume de l'enceinte.
  9. Lampe à décharge aux halogénures métalliques suivant la revendication 7, caractérisée en ce que la quantité du Cs par cm3 du volume de l'enceinte est comprise dans l'intervalle suivant : 0 µmole < Cs ≤ 3 µmole.
  10. Lampe à décharge aux halogénures métalliques suivant la revendication 9, caractérisée en ce que la quantité du Cs par cm3 du volume de l'enceinte est de préférence comprise dans l'intervalle suivant: 0,5 µmole ≤ Cs ≤ 2,5 µmole.
  11. Lampe à décharge aux halogénures métalliques suivant la revendication 7, caractérisée en ce que l'atmosphère contient comme métal de terres rares du dysprosium (Dy), la quantité du dysprosium étant comprise entre 0,3 µmole et 3 µmole par cm3 du volume de l'enceinte.
  12. Lampe à décharge aux halogénures métalliques suivant la revendication 11, caractérisée en ce que le dysprosium est remplacé en tout ou partie par de l'holmium.
EP96112969A 1995-08-23 1996-08-12 Lampe à décharge aux halogénures métalliques utilisée à des fins de projection Expired - Lifetime EP0762475B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19530821A DE19530821A1 (de) 1995-08-23 1995-08-23 Metallhalogenid-Entladungslampe für Projektionszwecke
DE19530821 1995-08-23
DE19548518 1995-12-22
DE19548518A DE19548518A1 (de) 1995-08-23 1995-12-22 Metallhalogenid-Entladungslampe für Projektionszwecke

Publications (2)

Publication Number Publication Date
EP0762475A1 EP0762475A1 (fr) 1997-03-12
EP0762475B1 true EP0762475B1 (fr) 1999-11-03

Family

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Application Number Title Priority Date Filing Date
EP96112969A Expired - Lifetime EP0762475B1 (fr) 1995-08-23 1996-08-12 Lampe à décharge aux halogénures métalliques utilisée à des fins de projection

Country Status (4)

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US (1) US5831388A (fr)
EP (1) EP0762475B1 (fr)
JP (1) JP3993656B2 (fr)
CA (1) CA2182423C (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3200575B2 (ja) * 1997-09-01 2001-08-20 フェニックス電機株式会社 メタルハライドランプ
JP3216877B2 (ja) * 1997-11-18 2001-10-09 松下電子工業株式会社 高圧放電ランプ、この高圧放電ランプを光源とした照明光学装置、およびこの照明光学装置を用いた画像表示装置
EP0944109B2 (fr) * 1998-03-16 2008-02-13 Matsushita Electric Industrial Co., Ltd. Lampe à décharge et sa méthode de fabrication
US6888312B2 (en) * 2002-12-13 2005-05-03 Welch Allyn, Inc. Metal halide lamp for curing adhesives
WO2006088128A1 (fr) * 2005-02-17 2006-08-24 Gs Yuasa Corporation Lampe en halogénure de métal céramique de puissance nominale supérieure ou égale à 450w
US20090267516A1 (en) * 2006-09-29 2009-10-29 Koninklijke Philips Electronics N.V. Ceramic metal halide daylight lamp

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2114805A1 (de) * 1971-03-26 1972-10-05 Patra Patent Treuhand Hochdruckentladungslampe
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
US3748520A (en) * 1972-05-05 1973-07-24 Gen Telephone & Elect Electric discharge lamp having a fill including niobium pentaiodide complexed with an inorganic oxo-compound as the primary active component
US4074166A (en) * 1976-11-19 1978-02-14 Gte Sylvania Incorporated Ultraviolet emitting arc discharge lamp
DE2840031A1 (de) * 1978-09-14 1980-04-03 Patra Patent Treuhand Anordnung mit hochdruckentladungslampe und reflektor als baueinheit
NL8005456A (nl) * 1980-10-02 1982-05-03 Philips Nv Hogedrukkwikdampontladingslamp.
DE3427280C2 (de) * 1984-07-24 1986-06-12 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Metallhalogenid-Hochdruckentladungslampe
US4672267A (en) * 1986-04-04 1987-06-09 Gte Laboratories Incorporated High intensity discharge device containing oxytrihalides
JP2650463B2 (ja) * 1989-05-31 1997-09-03 岩崎電気株式会社 メタルハライドランプ
DE4030202A1 (de) * 1990-09-24 1992-03-26 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenid-hochdruckentladungslampe
DE4310539A1 (de) * 1993-03-31 1994-10-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenid-Hochdruckentladungslampe für den Einbau in optische Systeme

Also Published As

Publication number Publication date
CA2182423C (fr) 2006-12-12
JP3993656B2 (ja) 2007-10-17
US5831388A (en) 1998-11-03
JPH0963538A (ja) 1997-03-07
CA2182423A1 (fr) 1997-02-24
EP0762475A1 (fr) 1997-03-12

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