EP0762475A1 - 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
EP0762475A1
EP0762475A1 EP96112969A EP96112969A EP0762475A1 EP 0762475 A1 EP0762475 A1 EP 0762475A1 EP 96112969 A EP96112969 A EP 96112969A EP 96112969 A EP96112969 A EP 96112969A EP 0762475 A1 EP0762475 A1 EP 0762475A1
Authority
EP
European Patent Office
Prior art keywords
μmol
filling
metal
discharge 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.)
Granted
Application number
EP96112969A
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German (de)
English (en)
Other versions
EP0762475B1 (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 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.
  • WO 94/23441 discloses such a lamp for specific arc powers between 60 and 140 W per mm arc length with a filling which, in addition to mercury (Hg) and an inert gas, also contains halogen compounds of the elements cesium (Cs), dysprosium (Dy) and Contains tantalum (Ta). It is disadvantageous that, at higher than the specified arc powers, there is an increase in unrest.
  • the invention has for its object to eliminate the disadvantage mentioned and to provide a metal halide discharge lamp which has a color temperature of more than 4500 K - with good color rendering - and a low level of unrest even at very high specific arc powers.
  • the task formulated at the beginning can also be solved with a filling which, in contrast to the cited prior art, dispenses with Cs as the filling component.
  • a filling which, in contrast to the cited prior art, dispenses with Cs as the filling component.
  • Nb niobium
  • the Nb acts directly on the arch attachment in the electrode area. Without intending to be bound by any theoretical explanation, it is believed that the Nb forms a mixed phase with the electrode material, which contributes to arc stability.
  • 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) for the formation of metal halides.
  • Dy can also be replaced in whole or in part by another rare earth element with comparable properties in gas discharge, 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 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 demands on arc rest and lamp life as well as especially with 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 used, for example, to optimize the electrode geometry with a view to a longer service life.
  • the disadvantage is that the luminous efficiency decreases with increasing Cs content. In individual cases, a suitable compromise will be made for the concrete value of the Cs share.
  • the lamp is advantageously combined with a reflector to form a structural unit, as described in DE-PS 28 40 031.
  • the lamp is mounted approximately 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, which are led gas-tight to the outside.
  • Typical values for the specific arc power are in the range between approx. 100 W and 200 W or more per mm arc length, in particular in the Range between approx. 150 W and 200 W per mm arc length. Average luminance levels of typically more than 45 kcd / cm 2 are achieved.
  • the discharge vessel 2 made of quartz glass has an essentially spherical shape and has a neck at two diametrically opposite locations, into which pin-shaped tungsten electrodes 3 are melted by means of sealing foils 4 made of molybdenum.
  • the ends of the sealing foils 4 facing away from the discharge space are welded to power leads 5, which in turn are connected to electrical connections 6, 7 of the reflector base system.
  • the reflector base system consists - apart from the electrical connections 6, 7 - essentially of the reflector 8 and a two-part ceramic base 9, 10.
  • 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.
  • 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 burning 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.
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
DE19530821 1995-08-23
DE19530821A DE19530821A1 (de) 1995-08-23 1995-08-23 Metallhalogenid-Entladungslampe für Projektionszwecke
DE19548518A DE19548518A1 (de) 1995-08-23 1995-12-22 Metallhalogenid-Entladungslampe für Projektionszwecke
DE19548518 1995-12-22

Publications (2)

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

Family

ID=26017893

Family Applications (1)

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)

Country Link
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
KR100350616B1 (ko) * 1998-03-16 2002-08-30 마츠시타 덴끼 산교 가부시키가이샤 방전램프의 제조방법
US6888312B2 (en) * 2002-12-13 2005-05-03 Welch Allyn, Inc. Metal halide lamp for curing adhesives
JP5274830B2 (ja) * 2005-02-17 2013-08-28 株式会社Ｇｓユアサ 定格ランプ電力が４５０ｗ以上のセラミックメタルハライドランプ
WO2008038245A2 (fr) * 2006-09-29 2008-04-03 Koninklijke Philips Electronics, N.V. Ampoule de phare aux halogénures métalliques céramique

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2130255A2 (fr) * 1971-03-26 1972-11-03 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh
FR2130502A2 (fr) * 1971-03-26 1972-11-03 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh
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
EP0169510A2 (fr) * 1984-07-24 1986-01-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge à haute pression à halogénure métallique
US4672267A (en) * 1986-04-04 1987-06-09 Gte Laboratories Incorporated High intensity discharge device containing oxytrihalides
EP0477668A1 (fr) * 1990-09-24 1992-04-01 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge aux halogénures métalliques à haute pression
DE4310539A1 (de) * 1993-03-31 1994-10-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenid-Hochdruckentladungslampe für den Einbau in optische Systeme

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.
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

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2130255A2 (fr) * 1971-03-26 1972-11-03 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh
FR2130502A2 (fr) * 1971-03-26 1972-11-03 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh
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
EP0169510A2 (fr) * 1984-07-24 1986-01-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge à haute pression à halogénure métallique
US4672267A (en) * 1986-04-04 1987-06-09 Gte Laboratories Incorporated High intensity discharge device containing oxytrihalides
EP0477668A1 (fr) * 1990-09-24 1992-04-01 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge aux halogénures métalliques à haute pression
DE4310539A1 (de) * 1993-03-31 1994-10-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenid-Hochdruckentladungslampe für den Einbau in optische Systeme

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 3, no. 65 (M - 061) 6 June 1979 (1979-06-06) *

Also Published As

Publication number Publication date
CA2182423C (fr) 2006-12-12
EP0762475B1 (fr) 1999-11-03
JPH0963538A (ja) 1997-03-07
JP3993656B2 (ja) 2007-10-17
CA2182423A1 (fr) 1997-02-24
US5831388A (en) 1998-11-03

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