EP1069594A2 - Lamp à arc à courant continu - Google Patents

Lamp à arc à courant continu Download PDF

Info

Publication number
EP1069594A2
EP1069594A2 EP00117488A EP00117488A EP1069594A2 EP 1069594 A2 EP1069594 A2 EP 1069594A2 EP 00117488 A EP00117488 A EP 00117488A EP 00117488 A EP00117488 A EP 00117488A EP 1069594 A2 EP1069594 A2 EP 1069594A2
Authority
EP
European Patent Office
Prior art keywords
lamp
lamp according
anode
piston
curvature
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
EP00117488A
Other languages
German (de)
English (en)
Other versions
EP1069594A3 (fr
EP1069594B1 (fr
Inventor
Andreas Dr. Genz
Frank Werner
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 EP1069594A2 publication Critical patent/EP1069594A2/fr
Publication of EP1069594A3 publication Critical patent/EP1069594A3/fr
Application granted granted Critical
Publication of EP1069594B1 publication Critical patent/EP1069594B1/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
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes
    • 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
    • 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

Definitions

  • the present invention relates to a DC arc lamp according to the Preamble of claim 1.
  • the color separation effect is caused by the anode between the lamps and cathode of the direct current arc lamp causes direct electrical field.
  • the DC electrical field influences the concentration distribution of the light-generating Metal ions between anode and cathode. This will make the spatial Distribution of the metal ions between the anode and cathode is usually inhomogeneous.
  • different concentration distributions arise for different types of metal ions on. Because different types of metal ions have different spectral Contributing to the total luminous flux of the lamp ultimately results in the unwanted Color separation effect.
  • the invention relates to a DC arc lamp with a halogen filling.
  • metal halides during lamp operation inside the discharge vessel.
  • Metal halides have a higher one Vapor pressure as the corresponding elemental metals.
  • the high specific arc powers typically approx. 80 W per mm arc length and more also high vapor pressures of the light-generating metal halides.
  • the high luminous flux of the lamp is ensured.
  • Another essential quality criterion - not only in the area of projection - are sufficient proportions of the primary colors blue, green and red for good color rendering and the desired color temperature.
  • No. 2,965,790 also shows an arc lamp with an asymmetrically shaped one Piston in which the inner wall of the piston around the anode is wider than around the cathode.
  • the invention is based on the technical problem of a DC arc lamp with improved operating properties, especially with regard to projection applications, and to provide an improved projection device.
  • a DC arc lamp a filling of at least the following components: an ignition gas, mercury and a halogen, characterized by the additional component: zinc and in that the total concentration for zinc, including optionally present
  • the total cadmium is in the following range: 0.05 to 3.0 ⁇ mol per ml of the lamp vessel or a projection device with such a projection lamp.
  • the proportion of red in the light generated can be due to lithium in the filling of the invention DC arc lamp are amplified.
  • lithium predominantly shows a very long-wave emission, i.e. to a very deep red part leads.
  • V ( ⁇ ) - or brightness sensitivity curve is shown.
  • the spectral sensitivity of the human eye decreases significantly at the long-wave edge. Therefore, as far as the red component is based on the lithium emission, a corresponding one increased spectral power can be generated to the desired - and ultimately of interest - to generate luminous flux.
  • a metal halide direct current arc lamp is necessary in addition to an ignition gas, e.g. Argon, and a halogen, e.g. Bromine or iodine, too It must contain mercury to build up the necessary burning voltage green color of mercury. That through the mercury content The specified green component must be red when setting the color temperature be compensated, which exacerbates the problem outlined above.
  • an ignition gas e.g. Argon
  • a halogen e.g. Bromine or iodine
  • Zinc is in the context of this invention as an alternative to the 2B element Zinc is not suitable because it is also to a certain extent the color separation is reduced, but it increases the amount of green in the light excessively.
  • Zinc offers versus cadmium, which can also be included optionally, and Mercury also has the benefit of better environmental performance.
  • Cadmium on the other hand can be beneficial for certain applications because of the red rendering is even better. According to the invention, the zinc and cadmium quantities are therefore measured in individual cases the possibility to choose between optimal lamp data and environmental considerations.
  • the following preferred concentrations come in particular for Cd and Zn considered: 0.05 to 3.0 pmol per ml of vessel volume.
  • concentration information refer to the sum of the individual concentrations of Cd or Zn, where the concentration of one of the two individual components can also be zero.
  • the component additionally shows yttrium just together with the basic composition according to the invention explained special advantages.
  • the first is an improvement in the luminous flux.
  • Yttrium is therefore used to achieve the above basic effects of the invention are not necessary, but has proven to be in in terms of luminous flux, service life and maintenance surprisingly more effective optional addition highlighted.
  • a “blue element” preferred according to the invention is indium.
  • rare earth metals especially dysprosium, as well as thallium.
  • halogen for the setting of desired vapor pressures through the formation of metal halide compounds iodine and / or bromine are preferred.
  • the anode In the case of direct current arc lamps, the anode is in principle a much stronger one exposed to thermal stress than the cathode and becomes accordingly hotter. So that it can withstand this thermal load, the anode is at DC arc lamps are generally much more solid than the cathode. In particular, it generally has a larger diameter.
  • the temperature homogeneity of the lamp is improved by that the inside wall of the piston is wider around the anode than around the cathode. This can, depending on the selected shape of the electrodes and depending on the manufacturing technology Aspects, with different concrete geometric shapes can be achieved, with geometrically simple and therefore easy to manufacture piston shapes are preferred.
  • the arc length is in Connection with the lamp power.
  • a reference to the piston size makes little sense, because the piston size due to the thermal load capacity of the piston material is determined and consequently in future material improvements (Ceramic instead of quartz glass) can decrease significantly.
  • Quantitatively preferred ranges for the asymmetry of the piston shapes can be describe by the ratio of anode-side to cathode-side longitudinal section half-area. As illustrated in the exemplary embodiment, these are surfaces meant that in longitudinal section on both sides of one dividing the inner length of the piston in the middle and lie on the plane perpendicular to the lamp longitudinal axis, the lamp longitudinal axis each contain half of the inside length of the piston and the rest of the inside wall of the piston are limited. This ratio is preferably over 1.1 and further preferably less than 1.5.
  • Shapes are often used in lamp bulb molding machines for simplified mold production for the sake of internal surfaces corresponding to the shape of the piston have it described in longitudinal section by radii of curvature.
  • the anode-side and the cathode-side end of the piston by one Longitudinal section radius of curvature (as illustrated in the exemplary embodiment in the figure) describe, it being preferred according to the invention that the anode-side Longitudinal section radius of curvature is smaller than the cathode side, preferably 50% to 80% of the latter. This means that the piston is stronger on the anode side curved or less flat. So another piston shape becomes on the anode side reached.
  • the intention pursued according to the invention to reduce temperature gradients in the lamp can alternatively also by a suitable reflecting and / or absorbing Heat accumulation can be reached at the end of the piston on the cathode side.
  • a suitable reflecting and / or absorbing Heat accumulation can be reached at the end of the piston on the cathode side.
  • the figure shows in longitudinal section a DC short-arc lamp with a longitudinal axis 2, along which an anode 4 and a cathode 5 lie.
  • a longitudinal direction in the Middle of the piston interior enclosed by a piston inner wall 3 that is bisecting an inner bulb length 7 is also one on the lamp longitudinal axis 2 perpendicular center plane 1 is drawn.
  • the anode-side longitudinal section half surface differs specifically and the cathode-side longitudinal section half surface, each of which in the Figure left or right of the central plane lying longitudinal section area within the piston inner wall 3 corresponds.
  • the figure shows that the anode-side curvature of the piston in longitudinal section Descriptive radius of curvature 8 significantly smaller than the corresponding one Radius of curvature 9 on the cathode side.
  • the radius of curvature is preferably 8 50% - 80% of the radius of curvature 9. It can also be seen that the corresponding Longitudinal intersection centers above and below the lamp longitudinal axis 2 do not coincide and are different on the anode side and cathode side lie. However, the lamp is rotationally symmetrical about the lamp longitudinal axis 2.
  • the corresponding asymmetrical piston design has the consequence that the piston around the anode 4, which is much thicker than the cathode 5, is sufficient Keeps a distance and thus a uniform temperature distribution overall results in the longitudinal direction.
  • the figure shows that the distance between the anode 4 and the cathode 5, that is to say the arc length 6, is selected to be very short, in the present case 1.5 mm in comparison to radii of curvature of 4 mm (8) and 6 mm (9) and a lamp power of 270 W (specific power 180 W / mm).
  • the inside length of the piston 7 is almost 10 times the length of the arc 6.
  • An operating voltage of 35 V with a luminous flux of 18 klm results from a filling volume of 0.7 ml with a wall load of 65 W / cm 2 .
  • a color temperature of 6,800 K was set with the following filling: 200 mbar argon, 20 mg mercury, 0.11 mg cadmium iodide (Cdl 2 ) - corresponding to approx.0.43 ⁇ mol Cd per ml flask volume -, 0.42 mg mercury bromide (HgBr 2 ), 0.12 mg mercury iodide (Hgl 2 ), 0.05 mg indium iodide (Inl 2 ), 0.05 mg lithium iodide (LiI 2 ), 0.11 mg dysprosium and 0.05 mg yttrium.
  • Cadmium can be replaced by zinc in a molar equivalent.
  • Thallium iodide can be added up to a value of 0.2 mg / ml.

Landscapes

  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Projection Apparatus (AREA)
  • Luminescent Compositions (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP00117488A 1997-04-04 1998-03-09 Lamp à arc à courant continu Expired - Lifetime EP1069594B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19714009 1997-04-04
DE19714009A DE19714009A1 (de) 1997-04-04 1997-04-04 Gleichstrombogenlampe
EP98104179A EP0869537B1 (fr) 1997-04-04 1998-03-09 Lampe à arc à courant continu

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP98104179A Division EP0869537B1 (fr) 1997-04-04 1998-03-09 Lampe à arc à courant continu

Publications (3)

Publication Number Publication Date
EP1069594A2 true EP1069594A2 (fr) 2001-01-17
EP1069594A3 EP1069594A3 (fr) 2001-03-21
EP1069594B1 EP1069594B1 (fr) 2002-10-02

Family

ID=7825485

Family Applications (2)

Application Number Title Priority Date Filing Date
EP98104179A Expired - Lifetime EP0869537B1 (fr) 1997-04-04 1998-03-09 Lampe à arc à courant continu
EP00117488A Expired - Lifetime EP1069594B1 (fr) 1997-04-04 1998-03-09 Lamp à arc à courant continu

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP98104179A Expired - Lifetime EP0869537B1 (fr) 1997-04-04 1998-03-09 Lampe à arc à courant continu

Country Status (4)

Country Link
US (1) US6051929A (fr)
EP (2) EP0869537B1 (fr)
JP (1) JPH10283992A (fr)
DE (3) DE19714009A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012022604A1 (fr) * 2010-08-20 2012-02-23 Osram Ag Lampe à décharge à courant continu présentant une ampoule asymétrique

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1149406B1 (fr) * 1999-11-11 2006-08-02 Koninklijke Philips Electronics N.V. Lampe a decharge haute pression
JP4042605B2 (ja) * 2003-03-31 2008-02-06 ウシオ電機株式会社 キセノンランプ
US7759849B2 (en) 2004-10-18 2010-07-20 Heraeus Noblelight Ltd. High-power discharge lamp
DE102005017371A1 (de) * 2005-04-14 2007-01-11 Heraeus Noblelight Limited, Milton Hochleistungsentladungslampe
JP5304425B2 (ja) * 2009-05-12 2013-10-02 ウシオ電機株式会社 紫外線放射放電ランプ
JP2013232311A (ja) * 2012-04-27 2013-11-14 Iwasaki Electric Co Ltd メタルハライドランプ

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE288229C (fr) *
DE902528C (de) * 1935-11-19 1954-01-25 Ulrich W Doering Elektrische Hochdruckentladungsleuchtroehre
GB600495A (en) * 1945-09-24 1948-04-09 Gen Electric Co Ltd Improvements in and relating to high pressure metal vapour electric discharge lamps
GB689962A (en) * 1948-04-02 1953-04-08 Gen Electric Co Ltd Improvements in or relating to high pressure electric discharge lamps
US2965790A (en) * 1949-08-20 1960-12-20 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High pressure gas lamp
NL250825A (fr) * 1960-04-22
GB1337134A (en) * 1970-01-26 1973-11-14 Gen Electric Metal halide lamp
NL7403204A (nl) * 1974-03-11 1975-09-15 Philips Nv Elektrische lamp.
DE2953446C2 (de) * 1978-12-28 1983-12-22 Mitsubishi Denki K.K., Tokyo Hochdruck-Metalldampfentladungslampe
US4360756A (en) * 1979-11-13 1982-11-23 General Electric Company Metal halide lamp containing ThI4 with added elemental cadmium or zinc
DE3044184A1 (de) * 1980-11-24 1982-06-16 Mutzhas Maximilian F Vorrichtung zur phototherapeutischen behandlung der hyperbilirubinaemie
DE3208647A1 (de) * 1982-03-10 1983-09-22 Patra Patent Treuhand Quecksilberdampf-hochdruckentladungslampe
DE3506295A1 (de) * 1985-02-22 1986-08-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Kompakte hochdruckentladungslampe
EP0220633B1 (fr) * 1985-10-25 1991-07-03 General Electric Company Chambre à arc électrique asymétrique pour lampe à décharge
DE3716485C1 (de) * 1987-05-16 1988-11-24 Heraeus Gmbh W C Xenon-Kurzbogen-Entladungslampe
US4935668A (en) * 1988-02-18 1990-06-19 General Electric Company Metal halide lamp having vacuum shroud for improved performance
JP2775694B2 (ja) * 1993-05-07 1998-07-16 ウシオ電機株式会社 放電ランプ
DE69402641T2 (de) * 1993-08-03 1997-08-21 Ushiodenki K K Cadmiumentladungslampe
JP2970993B2 (ja) * 1994-04-20 1999-11-02 ウシオ電機株式会社 ショートアークメタルハライドランプ
EP0714118B1 (fr) * 1994-11-25 2002-07-24 Ushiodenki Kabushiki Kaisha Lampe aux halogénures métalliques du type à arc court
JP3077538B2 (ja) * 1994-11-29 2000-08-14 ウシオ電機株式会社 ショートアーク型水銀ランプ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012022604A1 (fr) * 2010-08-20 2012-02-23 Osram Ag Lampe à décharge à courant continu présentant une ampoule asymétrique

Also Published As

Publication number Publication date
US6051929A (en) 2000-04-18
EP0869537B1 (fr) 2002-12-04
DE59806489D1 (de) 2003-01-16
EP0869537A1 (fr) 1998-10-07
EP1069594A3 (fr) 2001-03-21
EP1069594B1 (fr) 2002-10-02
DE19714009A1 (de) 1998-10-08
DE59805855D1 (de) 2002-11-07
JPH10283992A (ja) 1998-10-23

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