EP0925602A2 - Lampe a decharge aux halogenures de metal presentant une longue duree de vie - Google Patents

Lampe a decharge aux halogenures de metal presentant une longue duree de vie

Info

Publication number
EP0925602A2
EP0925602A2 EP98931952A EP98931952A EP0925602A2 EP 0925602 A2 EP0925602 A2 EP 0925602A2 EP 98931952 A EP98931952 A EP 98931952A EP 98931952 A EP98931952 A EP 98931952A EP 0925602 A2 EP0925602 A2 EP 0925602A2
Authority
EP
European Patent Office
Prior art keywords
lamp
filling
lamp according
μmol
metal halide
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
EP98931952A
Other languages
German (de)
English (en)
Other versions
EP0925602B1 (fr
Inventor
Andreas Genz
Hans-Werner Gölling
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 EP0925602A2 publication Critical patent/EP0925602A2/fr
Application granted granted Critical
Publication of EP0925602B1 publication Critical patent/EP0925602B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

Definitions

  • the invention relates to a metal halide discharge lamp according to the preamble of claim 1. It relates in particular to a metal halide discharge lamp for the field of application of effect light illumination, i.e. with color temperatures above the so-called "daylight" temperature of 4200 K and with medium arc lengths.
  • Such lamps are preferably used for luminaires for architectural and effect lighting, in particular for accent lighting of limited areas that emphasize and enhance the ambient lighting, e.g. in houses and apartments, in galleries or at events.
  • the optical properties of the light in particular the localization of the light generation, the luminous flux related to the lamp output and the color temperature are subject to requirements that have to be classified between general lighting and special requirements, such as for projection. are.
  • the invention is based on the technical problem of increasing the service life of a metal halide discharge lamp according to the preamble of claim 1.
  • the invention assumes that devitrification, that is to say increasing crystallization of the bulb of a metal halide discharge lamp, essentially determines its lifespan.
  • the invention therefore provides for a filling without a rare earth element, because the rare earth elements have proven to be an essential cause for the devitrification phenomenon with increasing operating age of the lamp.
  • this effect can be used to reduce the wall load.
  • the bulb can either be enlarged for a given electrical power consumption of the lamp or, conversely, the power consumption can be reduced for a given bulb size. This was in a conventional way until- not possible without having to put up with the blackening problems then occurring.
  • the lower wall load also reduces the tendency to devitrification and thus improves the devitrification and thus the life of the lamp, in addition to the direct effect of not using rare earth elements.
  • the described effects of the invention can be realized with a filling which, in addition to the conventional constituents, ignition gas, mercury and halogen, contains the constituents lithium, indium, thallium and tin.
  • Lithium provides the red component, indium the blue component and thallium the green component in the radiation from the lamp. All three elements emit essentially spectral lines, so that tin is used according to the invention in order to achieve a good continuum between the lines, in particular at low power and wall loads.
  • the entirety of the characterizing features of claim 1 thus results in a metal halide discharge lamp with the desired spectral composition of the emitted light and, moreover, a considerably improved service life.
  • Lamps with a coloring temperature of more than 4800 K, better more than 5000 K are preferred.
  • the arc length corresponding to the lamp power is in the middle range; in particular, the specific power based on the arc length can be between 40 and 80 W / mm, depending on the embodiment.
  • a preferred range for the reduced wall load which is possible on the basis of the invention, as explained above, is between 30 and 60 W / cm 2 .
  • the lamp filling contains no sodium. It is particularly preferred that, apart from those mentioned, no other Other components are present in the filling, apart from the usual traces.
  • Preferred halogens are the conventionally known elements iodine and bromine, i.e. the metals mentioned lithium, indium, thallium and tin are added to the lamp as iodides and / or as bromides. Conventionally, part of the mercury is also added as iodide or bromide to avoid excessive lamp blackening. According to the invention, there is the additional advantage that this measure is unnecessary in the claimed lamp filling.
  • the elemental mercury and the halogen with respect to the halides of the elements lithium, indium, thallium, tin can be added stoichiometrically or only in the form of the halides of these four elements. This results in the advantage for production that at least one component is less, namely the mercury iodide, bromide or generally halide.
  • Lithium 0.15-3.0 ⁇ mol / ml, in particular 0.15-1.5 ⁇ mol / ml
  • the invention finds a meaningful area of application in the power range from 200 to 2500 W per lamp, but can also be used outside of this area. before being applied. As already explained at the beginning, it is particularly suitable for the effect light market, in which the demands on the color locus and the luminance are somewhat lower than in special applications such as in the film or projection sector. In contrast, the significantly improved lifespan is particularly noticeable in the effect light area as an economically significant advantage.
  • lamps are often equipped with an additional outer bulb. Special gas fillings can also be used between the outer and inner pistons instead of a vacuum.
  • the invention is equally suitable for lamps with or without an outer bulb.
  • the outer bulb can e.g. can also be advantageous as protection against contact, for example if an inner bulb provided with two opposite sides is to be used in a lamp to be connected on only one side. Then one of the two connections of the inner bulb must be guided along the outer wall of the inner bulb to the other side, an outer bulb being attached as a protection against contact. Finally, the improved explosion protection can also be a reason for choosing a lamp with an outer bulb.
  • a 300 W lamp has an average arc length of 5 mm. It is designed for operation without an outer bulb and has a piston volume of 1.1 ml. If an outer bulb were used, increasing the wall temperature would slightly lower the color temperature. To compensate for this, the wall load would be reduced (ie the lamp output reduced or the inner bulb is enlarged) and / or the proportion of lithium iodide is reduced in order to obtain the desired color temperature value. In the present example, this is 5500 K.
  • a luminous flux of 21 klm was achieved with this lamp.
  • the lifespan is over 2000 hours.
  • Another 300 W lamp has an average arc length of 5 mm. It is designed for operation without an outer bulb and has a piston volume of 1.5 ml. The color temperature is 6100 K.
  • a luminous flux of 22.5 klm was achieved with this lamp.
  • the service life is also over 2000 hours.
  • the spatial-physical design is conventional and corresponds, for example, to the form explained in the European patent application with the application number 91 120 910.4 and the publication number 0 492 205 A2. The corresponding disclosure is hereby incorporated by reference.

Landscapes

  • Discharge Lamp (AREA)

Abstract

Selon l'invention, un meilleure remplissage d'une lampe à décharge aux halogénures de métal sert à allonger la durée de vie de la lampe. La lampe selon l'invention est particulièrement appropriée pour le domaine de l'éclairage d'ambiance.
EP98931952A 1997-04-21 1998-04-20 Lampe a decharge aux halogenures de metal presentant une longue duree de vie Expired - Lifetime EP0925602B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19716462 1997-04-21
DE19716462 1997-04-21
PCT/DE1998/001097 WO1998048446A2 (fr) 1997-04-21 1998-04-20 Lampe a decharge aux halogenures de metal presentant une longue duree de vie

Publications (2)

Publication Number Publication Date
EP0925602A2 true EP0925602A2 (fr) 1999-06-30
EP0925602B1 EP0925602B1 (fr) 2002-09-04

Family

ID=7827053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98931952A Expired - Lifetime EP0925602B1 (fr) 1997-04-21 1998-04-20 Lampe a decharge aux halogenures de metal presentant une longue duree de vie

Country Status (5)

Country Link
US (1) US6218781B1 (fr)
EP (1) EP0925602B1 (fr)
JP (1) JP2000512803A (fr)
DE (1) DE59805403D1 (fr)
WO (1) WO1998048446A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29905662U1 (de) 1999-03-26 2000-08-10 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Metallhalogenid-Entladungslampe mit langer Lebensdauer
EP1271614B1 (fr) * 2001-06-27 2005-09-21 Matsushita Electric Industrial Co., Ltd. Lampe à halogénure métallique
DE10242049A1 (de) * 2002-09-11 2004-03-25 Philips Intellectual Property & Standards Gmbh Niederdruckgasentladungslampe mit zinnhaltiger Gasfüllung
US7847484B2 (en) * 2004-12-20 2010-12-07 General Electric Company Mercury-free and sodium-free compositions and radiation source incorporating same
DE102006025947A1 (de) * 2006-06-02 2007-12-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Metallhalogenidfüllung für eine elektrische Hochdruckentladungslampe und zugehörige Lampe
DE102008049476A1 (de) * 2008-09-29 2010-04-01 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7203720A (fr) * 1972-03-20 1973-09-24
JPS5550567A (en) * 1978-10-11 1980-04-12 Toshiba Corp Metal halide lamp
US4360758A (en) * 1981-01-23 1982-11-23 Westinghouse Electric Corp. High-intensity-discharge lamp of the mercury-metal halide type which efficiently illuminates objects with excellent color appearance
DD203430A1 (de) * 1982-01-19 1983-10-19 Kloss Elektrodenstabilisierte hochdruckentladungslampe mit leuchtzusaetzen
US5138229A (en) * 1989-09-20 1992-08-11 Toshiba Lighting & Technology Corporation Single-sealed metal vapor electric discharge lamp
DE4040858A1 (de) 1990-12-20 1992-06-25 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenid-hochdruckentladungslampe
JPH0547348A (ja) * 1991-08-15 1993-02-26 Toshiba Lighting & Technol Corp メタルハライドランプ
RU2058620C1 (ru) * 1993-06-21 1996-04-20 Государственный научно-исследовательский и проектный институт редкометаллической промышленности "Гиредмет" Люминесцентная лампа низкого давления
DE4327534A1 (de) * 1993-08-16 1995-02-23 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenidentladungslampe für fotooptische Zwecke

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9848446A3 *

Also Published As

Publication number Publication date
WO1998048446A2 (fr) 1998-10-29
US6218781B1 (en) 2001-04-17
JP2000512803A (ja) 2000-09-26
WO1998048446A3 (fr) 1999-01-21
DE59805403D1 (de) 2002-10-10
EP0925602B1 (fr) 2002-09-04

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