EP0741908B1 - Metallhalogenidentladungslampe für projektionszwecke - Google Patents

Metallhalogenidentladungslampe für projektionszwecke Download PDF

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Publication number
EP0741908B1
EP0741908B1 EP95906249A EP95906249A EP0741908B1 EP 0741908 B1 EP0741908 B1 EP 0741908B1 EP 95906249 A EP95906249 A EP 95906249A EP 95906249 A EP95906249 A EP 95906249A EP 0741908 B1 EP0741908 B1 EP 0741908B1
Authority
EP
European Patent Office
Prior art keywords
metal halide
discharge lamp
lamp according
halide discharge
subregion
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
EP95906249A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0741908A1 (de
Inventor
Clemens Barthelmes
Thomas Dittrich
Ralf Seedorf
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
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0741908A1 publication Critical patent/EP0741908A1/de
Application granted granted Critical
Publication of EP0741908B1 publication Critical patent/EP0741908B1/de
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
    • H01J61/82—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
    • H01J61/12—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
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • 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
    • H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • H01J61/523—Heating or cooling particular parts of the lamp

Definitions

  • the invention is based on a metal halide discharge lamp according to the preamble of the claim 1.
  • Such lamps can be used, for example, for the Video projection, endoscopy or even for that Use medical technology (operating room lights). They are particularly suitable for video projection in liquid crystal technology (LCD), in particular also for large screen TV screens with an aspect ratio from 16: 9. Typical power levels are 100 to 1500 W.
  • LCD liquid crystal technology
  • the lamps must be used for the stated purposes in addition to a high luminous efficiency, above all a good one to have very good color rendering. this applies especially in combination with reflectors, as used for projection purposes. Uniform luminance and color distribution on the projection screen is of great Importance.
  • Such a lamp is included in EP-A 0 459 786 Reflector revealed.
  • the surface of the discharge vessel in the area of a first electrode a reflective / thermal-isolating one Coating - hereinafter referred to as "heat accumulation" - on.
  • heat accumulation an area in which has a matt finish on the surface.
  • the area extends at least to the middle between the two electrodes and up to Middle of a wound around the second electrode Wire.
  • the lamp is for axial installation in designed a reflector. Perpendicular to the reflector axis considered is one of the or are both with AC operation in the immediate vicinity arc cores arising from the electrode Matting covered.
  • a disadvantage is that a significant part of those from these arches outgoing radiation by scattering on the matting lost for an image by the reflector goes. This also reduces the effective usable Luminous efficacy of the lamp - reflector system.
  • the object of the present invention is this Eliminate disadvantage and a lamp for projection purposes with improved light output create, which also through a homogeneous color distribution, good color rendering and long service life distinguished.
  • the basic idea of the invention is that Matting the surface of the discharge vessel to delimit an area between the electrodes.
  • the width of the matt surface is included smaller than or at most the same size as that Distance of the electrodes. This ensures that much of the radiation from both arc cores as directed radiation through the clear, i.e. unmatted surface. This can then efficiently with the help of a suitable one, for example parabolic reflector optically imaged will.
  • the width of the matted Surface and the roughness of the matting can be a suitable compromise between luminous flux and uniformity of illumination achieved will.
  • the quotient can be Width B of the matt surface and distance d of the electrodes vary in the range 0.1 ⁇ B / d ⁇ 1. Quotients are particularly good results between 0.4 and 0.8 reached.
  • the advantage of the invention is clear when one the decrease in the luminous flux of a lamp conventional matting - according to the teaching of EP-A 0 459 786 - with that by an inventive Matting compares. While in the first case the usable luminous flux decreases to 65% a comparable lamp according to the invention identical uniformity of illumination typically 80% of the luminous flux of the unmatted Lamp.
  • the discharge vessel consists of a translucent Material, for example quartz glass. It is on two ends hermetically sealed, e.g. by Crimp seals, and can be attached to one or both Ends be coated with a heat accumulation coating.
  • An important feature is that in any case initially on both edges of the matt surface a clear, i.e. uncoated area connects. This clear area of the surface can have different widths at both ends be, making two also different extensive heat accumulation result. With vertical Operating mode is less extensive heat accumulation on top. In this way can be obtained by convection Temperature difference between the upper and lower Counteracted end of the discharge vessel and thereby the light output can be increased.
  • the lamp is advantageously closed with a reflector assembled into a structural unit, as in EP-A 459,786.
  • the lamp is approximate mounted axially in the reflector.
  • the reflector is e.g. dichroic coated.
  • the lamp in the reflector so oriented that the less extensive Heat accumulation near the top of the reflector is arranged. This will shade the Reflector kept low and consequently the light output optimized.
  • the figure shows a metal halide lamp 1 with a power of 170 W and a discharge vessel 2 made of quartz glass, which is crushed on both sides 3.
  • the discharge volume is 0.7 cm 3 .
  • the axially opposite electrodes 4 are 5 mm apart. They consist of an electrode shaft 5 made of thoriated tungsten, onto which a filament 6 made of tungsten is pushed.
  • the shaft 5 is connected to an external power supply 8 in the area of the pinch 3 via a film 7.
  • the lamp 1 is approximately axially in one Parabolic reflector 9 arranged, the Arc that is between the two electrodes 4 in Operation trains, sits in the focus of the paraboloid.
  • Part of the first bruise 3a sits directly in a central hole in the reflector and is there held in a base 10 by means of putty, whereby the first power supply 8a with a screw base contact 10a is connected.
  • the second pinch 3b faces the reflector opening 11.
  • the second power supply line 8b is connected in the area of the opening 11 to a cable 12 which, in isolation from the wall of the reflector, is returned to a separate contact 10b.
  • the outer surfaces of the ends 13 of the discharge vessel are coated with ZrO 2 for heat accumulation purposes.
  • the heat accumulation layer 13b facing the reflector opening 11 has a greater extent than the heat accumulation layer 13a arranged axially opposite one another.
  • the central one is between the electrodes 4 Part 14 of the discharge vessel 2 matted.
  • the Width B of this matting is 3 mm, which means the ratio B / d of width B and electrode spacing d gives 0.6.
  • the one on a projection screen measured average illuminance is 6080 1x, where in the middle of the projection screen (the total area is 3 x 3 Divided individual areas) gives an illuminance of 13180 1x.
  • the filling of the discharge volume contains 200 mbar argon and mercury, 1.15 mg AlI 3 , 0.1 mg InI and 0.36 mg HgBr.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
EP95906249A 1994-01-28 1995-01-20 Metallhalogenidentladungslampe für projektionszwecke Expired - Lifetime EP0741908B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9401436U DE9401436U1 (de) 1994-01-28 1994-01-28 Metallhalogenidentladungslampe für Projektionszwecke
DE9401436U 1994-01-28
PCT/DE1995/000067 WO1995020822A1 (de) 1994-01-28 1995-01-20 Metallhalogenidentladungslampe für projektionszwecke

Publications (2)

Publication Number Publication Date
EP0741908A1 EP0741908A1 (de) 1996-11-13
EP0741908B1 true EP0741908B1 (de) 1998-04-22

Family

ID=6903832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95906249A Expired - Lifetime EP0741908B1 (de) 1994-01-28 1995-01-20 Metallhalogenidentladungslampe für projektionszwecke

Country Status (7)

Country Link
US (1) US5689154A (zh)
EP (1) EP0741908B1 (zh)
JP (1) JPH09509279A (zh)
KR (1) KR100372959B1 (zh)
CN (1) CN1069994C (zh)
DE (2) DE9401436U1 (zh)
WO (1) WO1995020822A1 (zh)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438294A1 (de) * 1994-10-26 1996-05-02 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenid-Entladungslampe für fotooptische Zwecke
DE69806322T2 (de) * 1997-09-29 2003-02-13 Matsushita Electric Industrial Co., Ltd. Verfahren und Vorrichtung zum Betreiben einer Entladungslampe
US6559600B1 (en) * 1998-11-17 2003-05-06 Matsushita Electric Industrial Co., Ltd. Discharge lamp, light source and projecting display unit
DE19910709A1 (de) * 1999-03-10 2000-09-14 Audi Ag Gasentladungslampe für einen Kraftfahrzeugscheinwerfer
US6583564B1 (en) * 1999-11-17 2003-06-24 Matsushita Electric Industrial Co., Ltd. Discharge lamp with light-intercepting film bands
DE102004005903A1 (de) * 2004-02-05 2005-08-25 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe und Herstellungsverfahren für eine Hochdruckentladungslampe
DE202004006087U1 (de) * 2004-04-16 2004-07-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe und zugehörige Leuchte
JP4547331B2 (ja) * 2005-12-28 2010-09-22 パナソニック株式会社 照明装置及び金属蒸気放電ランプ
DE102006007218A1 (de) * 2006-02-15 2007-08-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
DE102008063677B4 (de) * 2008-12-19 2012-10-04 Heraeus Noblelight Gmbh Infrarotstrahler und Verwendung des Infrarotstrahlers in einer Prozesskammer
CN106090784B (zh) * 2016-08-22 2018-10-02 都星甫 一种海上渔船捕鱼用的照明灯
JP7099434B2 (ja) * 2019-11-29 2022-07-12 株式会社村田製作所 コイル部品

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2619674C2 (de) * 1976-05-04 1986-05-07 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Halogen-Metalldampfentladungslampe
US4281267A (en) * 1979-05-14 1981-07-28 General Electric Company High intensity discharge lamp with coating on arc discharge tube
US4701664A (en) * 1986-01-09 1987-10-20 Becton, Dickinson And Company Mercury arc lamp suitable for inclusion in a flow cytometry apparatus
JPH03194848A (ja) * 1989-12-22 1991-08-26 Seiko Epson Corp 反射型光源装置
JPH03283344A (ja) * 1990-03-30 1991-12-13 Toshiba Lighting & Technol Corp 金属蒸気放電ランプ
US5220237A (en) * 1990-05-31 1993-06-15 Iwasaki Electric Co., Ltd. Metal halide lamp apparatus
JPH0494052A (ja) * 1990-08-09 1992-03-26 Matsushita Electron Corp メタルハライドランプ
JPH04206437A (ja) * 1990-11-30 1992-07-28 Matsushita Electron Corp メタルハライドランプ
DE4132530A1 (de) * 1991-09-30 1993-04-01 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe kleiner leistung
JPH05190141A (ja) * 1992-01-13 1993-07-30 Hamamatsu Photonics Kk 金属蒸気放電管

Also Published As

Publication number Publication date
US5689154A (en) 1997-11-18
EP0741908A1 (de) 1996-11-13
CN1069994C (zh) 2001-08-22
DE59501987D1 (de) 1998-05-28
JPH09509279A (ja) 1997-09-16
KR100372959B1 (ko) 2003-05-16
DE9401436U1 (de) 1994-03-31
CN1139496A (zh) 1997-01-01
WO1995020822A1 (de) 1995-08-03

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