EP1217644B1 - Lampe à décharge à haute pression et à arc court utilisée pour la projection d'images codées sous forme numérique - Google Patents

Lampe à décharge à haute pression et à arc court utilisée pour la projection d'images codées sous forme numérique Download PDF

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Publication number
EP1217644B1
EP1217644B1 EP01127159A EP01127159A EP1217644B1 EP 1217644 B1 EP1217644 B1 EP 1217644B1 EP 01127159 A EP01127159 A EP 01127159A EP 01127159 A EP01127159 A EP 01127159A EP 1217644 B1 EP1217644 B1 EP 1217644B1
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EP
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Prior art keywords
cathode
anode
pressure discharge
lamp
discharge lamp
Prior art date
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Expired - Lifetime
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EP01127159A
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German (de)
English (en)
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EP1217644A1 (fr
Inventor
Thomas Dr. Mehr
Ralf Seedorf
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Osram GmbH
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Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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    • 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
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps

Definitions

  • the invention relates to a short-arc high-pressure discharge lamp according to the preamble of claim 1. It is in particular a short-arc high-pressure discharge lamp with a xenon filling, as used in cinema projection.
  • the familiar projection xenon short arc lamps have been optimized for arc lengths and electrode geometries that are ideal for 35 to 70 mm film projection.
  • the image diagonals of these films are in the range between 28 and 60 mm. If such standard lamps are used in modern digital projection systems with DMD, DLP, LCD and D-ILA technology, the mismatch between the lamp and the optical system loses a lot of light that the screen does not reach. This lost light is converted into heat in the projector and leads to additional problems. Previously, this problem could be solved only by a larger lamp power, which then requires a higher cooling effort, an optimized mirror design that places high demands on the accuracy and the simulation effort and additional double mirror, which in turn bring cooling problems in the reflector volume.
  • a xenon short-arc lamp with a power of 3000 W, an arc length of 4 mm and a diameter of the anode casing body of 21 mm is known.
  • this lamp is operated with a lamp current of 110 A.
  • the diameter D of the anode in mm must satisfy the relation D ⁇ 2.1 x L + 10, where L is the distance of the facing end sections of the anode and cathode in mm in the hot state of the lamp.
  • the frustoconical end portion of the anode facing the cathode must have a plateau AP with a diameter in mm which corresponds to the relation 1.8 ⁇ L - 1 ⁇ AP ⁇ 1.8 x L + 1 is sufficient, where L in turn is the distance of the facing ends of the anode and cathode in mm in the hot state.
  • Deviations of the anode plate diameter downwards lead to a shortening of the service life due to severe erosion (crater formation) on the anode plateau.
  • the system efficiency is due to the shading back.
  • the tip of the conical end section of the cathode is formed as a hemisphere, wherein the radius R of the hemisphere in mm of the relation 0.12 x P + 0.1 ⁇ R ⁇ 0.12 x P + 0 , 5 with P as lamp power in kW is sufficient. Larger diameters of the hemisphere result in a lower luminance, smaller diameters lead to increased cathode erosion.
  • the conical end portion of the cathode has a cone angle ⁇ between 36 and 44 °.
  • the truncated conical end portion of the anode has a cone angle ⁇ between 90 and 105 ° for optimum operation. Higher geometries lead to a strong erosion of the electrode tips, while blunt geometries lead to a strong shading in the projector.
  • the lamp For optimum operation with a sufficiently high efficiency (lumens / W) and an acceptable luminous flux reduction over the life of the lamp, the lamp should have a rated power P between 0 and 5.5 kW with a lamp current I in A of 22 x P + 38 ⁇ I ⁇ 22 x P + 65 and at a rated power P between 5, 5 and 12 kW with a lamp current I in A of the relation 14 x P + 100 ⁇ I ⁇ 22 x P + 65 are operated. While lower currents reduce the light output in the system, at higher currents the erosion of the cathode increases and the maintenance falls below acceptable levels.
  • FIG. 1 a short-arc high-pressure discharge lamp 1 according to the invention is shown with an Xe filling.
  • the lamp 1 with a power consumption of 3000 W consists of a rotationally symmetrical lamp envelope 2 made of quartz glass at the two ends of each a lamp shaft 3, 4 is also made of quartz glass.
  • an electrode rod 5 made of tungsten is sealed gas-tight, the inner end of which carries a cathode 6.
  • an electrode rod 7 made of tungsten is also sealed gas-tight, at the inner end of an anode 8 is attached.
  • base systems 9, 10 are mounted for mounting and electrical contact.
  • the cathode 6 is composed of a conical end portion 6a facing towards the anode 8 and an end portion 6b facing the electrode rod 5 with a circular-cylindrical and frustoconical portion, wherein between these two portions 6a, 6b there is also a circular-cylindrical portion 6c, called heat build-up is of smaller diameter.
  • the tip of the anode 8 facing conical end portion 6a with a cone angle ⁇ of 40 ° is formed as a hemisphere with a radius R of 0.6 mm.
  • the anode 8 consists of a circular cylindrical central portion 8a with a diameter D of 22 mm and two frustoconical end portions 8b, 8c facing the cathode 6 and the electrode rod 7, respectively.
  • the cathode 6 facing the frusto-conical end portion 8c has a plateau AP with a diameter of 6 mm. All sections of the two electrodes 6, 8 are made of tungsten.
  • the two electrodes 6, 8 are mounted opposite one another in the axis of the lamp bulb 2 in such a way that, in the hot state of the lamp, there is an electrode spacing or an arc length of 3.5 mm.
  • this lamp When used in a digital projection system, this lamp can achieve an increase of up to 50% compared to conventional xenon-filled short arc high pressure discharge lamps.

Claims (5)

  1. Lampe ( 1 ) à décharge à haute pression et à arc court, comprenant une enceinte ( 2 ) de décharge qui contient, outre une cathode ( 6 ) et une anode ( 8 ) opposées l'une à l'autre, un remplissage en au moins du xénon, la cathode ( 6 ) ayant un tronçon ( 6a ) d'extrémité conique tourné vers l'anode ( 8 ) et l'anode ( 8 ) ayant un tronçon ( 8a ) médian cylindrique de section circulaire et un tronçon ( 8c ) d'extrémité en tronc de cône tourné vers la cathode ( 6 ) et la lampe ( 1 ) à décharge à haute pression ayant, pour l'utilisation dans des techniques de projection numériques, les autres caractéristiques suivantes .
    - la distance L en mm entre les deux tronçons ( 6a, 8c ) d'extrémité tournés l'un vers l'autre de la cathode ( 6 ) et de l'anode ( 8 ), lorsque la lampe est à l'état chaud, est donnée par la relation 0 , 8 × P ≤ L ≤ 1 × P + 1
    Figure imgb0013
    P étant la puissance de la lampe en kW
    - le diamètre du tronçon ( 8a ) médian cylindrique de section circulaire de l'anode ( 8 ) est donné en mm par la relation D ≥ 2 , 1 × L + 10
    Figure imgb0014
    L étant la distance entre les tronçons ( 6a, 8c ) d'extrémité tournés l'un vers l'autre de la cathode ( 6 ) et de l'anode ( 8 ) en mm
    caractérisée en ce que
    le tronçon ( 8c ) d'extrémité en tronc de cône de l'anode ( 8 ), qui est tourné vers la cathode ( 6 ), a un plateau AP ayant un diamètre en mm qui satisfait la relation 1 , 8 × L - 1 ≤ AP ≤ 1 , 8 × L + 1
    Figure imgb0015
    L étant la distance entre les tronçons ( 6a, 8c ) d'extrémité tournés l'un vers l'autre de la cathode ( 6 ) et de l'anode ( 8 ) en mm.
  2. Lampe à décharge à haute pression et à arc court suivant la revendication 1, caractérisée en ce que la pointe du tronçon ( 6a ) d'extrémité conique de la cathode ( 6 ) est constituée sous la forme d'une demi-sphère, le rayon R de la demi-sphère satisfaisant en mm la relation 0 , 12 × P + 0 , 1 ≤ R ≤ 0 , 12 × P + 0 , 5
    Figure imgb0016
    P étant la puissance de la lampe en kW.
  3. Lampe à décharge à haute pression et à arc court suivant la revendication 2, caractérisée en ce que le tronçon ( 6a ) d'extrémité conique de la cathode ( 6 ) a un angle a de cône compris entre 36 et 44°.
  4. Lampe à décharge à haute pression et à arc court suivant la revendication 1, caractérisée en ce que le tronçon ( 8a ) d'extrémité en tronc de cône de l'anode ( 8 ) tourné vers la cathode ( 6 ) a un angle β de cône compris entre 90 et 105°.
  5. Procédé pour faire fonctionner une lampe ( 1 ) à décharge à haute pression et à arc court suivant l'une ou plusieurs des revendications 1 à 4, caractérisé en ce que l'on fait fonctionner la lampe ( 1 ) à décharge à haute pression et à arc court
    - à une pression P nominale comprise entre 0 et 5,5 kW, à un courant I de lampe en A satisfaisant la relation 22 × P + 38 ≤ I ≤ 22 × P + 65
    Figure imgb0017
    - et à une puissance P nominale comprise entre 5,5 et 12 kW, à un courant I de lampe en A qui satisfait la relation 10 × P + 100 ≤ I ≤ 22 × P + 65
    Figure imgb0018
EP01127159A 2000-12-20 2001-11-15 Lampe à décharge à haute pression et à arc court utilisée pour la projection d'images codées sous forme numérique Expired - Lifetime EP1217644B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10063938 2000-12-20
DE10063938A DE10063938A1 (de) 2000-12-20 2000-12-20 Kurzbogen-Hochdruckentladungslampe für digitale Projektionstechniken

Publications (2)

Publication Number Publication Date
EP1217644A1 EP1217644A1 (fr) 2002-06-26
EP1217644B1 true EP1217644B1 (fr) 2009-01-07

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EP01127159A Expired - Lifetime EP1217644B1 (fr) 2000-12-20 2001-11-15 Lampe à décharge à haute pression et à arc court utilisée pour la projection d'images codées sous forme numérique

Country Status (8)

Country Link
US (1) US6573657B2 (fr)
EP (1) EP1217644B1 (fr)
JP (1) JP4261795B2 (fr)
KR (1) KR20020050177A (fr)
CN (1) CN1316550C (fr)
CA (1) CA2365357C (fr)
DE (2) DE10063938A1 (fr)
TW (1) TW527623B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010028472A1 (de) 2010-05-03 2011-11-03 Osram Gesellschaft mit beschränkter Haftung Edelgas - Kurzbogen - Entladungslampe
WO2012004166A1 (fr) 2010-07-06 2012-01-12 Osram Gesellschaft mit beschränkter Haftung Lampe à décharge à arc court

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6578970B2 (en) * 2001-09-19 2003-06-17 Advanced Radiation Corporation Point-like lamp with anode chimney
DE10209426A1 (de) * 2002-03-05 2003-09-18 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Kurzbogen-Hochdruckentladungslampe
JP4042605B2 (ja) * 2003-03-31 2008-02-06 ウシオ電機株式会社 キセノンランプ
JP4259282B2 (ja) * 2003-11-07 2009-04-30 ウシオ電機株式会社 高圧放電ランプ
JP4556656B2 (ja) * 2004-12-14 2010-10-06 ウシオ電機株式会社 ショートアーク型水銀ランプ
US20060175973A1 (en) * 2005-02-07 2006-08-10 Lisitsyn Igor V Xenon lamp
JP5247718B2 (ja) * 2006-12-18 2013-07-24 オスラム ゲーエムベーハー 放電ランプの電極
CN101802968B (zh) * 2007-09-21 2012-01-11 奥斯兰姆有限公司 直流放电灯
WO2009121400A1 (fr) * 2008-04-01 2009-10-08 Osram Gesellschaft mit beschränkter Haftung Procédé pour produire une lampe à décharge haute pression, procédé pour produire de la lumière au moyen d'une lampe à décharge haute pression et vidéoprojecteur numérique
DE102008062677A1 (de) 2008-12-17 2010-06-24 Osram Gesellschaft mit beschränkter Haftung Entladungslampe
JP4706779B2 (ja) * 2008-12-19 2011-06-22 ウシオ電機株式会社 超高圧水銀ランプ
JP5276485B2 (ja) * 2009-03-13 2013-08-28 株式会社オーク製作所 ショートアーク型放電ランプ
DE102009054670A1 (de) 2009-12-15 2011-06-16 Osram Gesellschaft mit beschränkter Haftung Elektrode für eine Entladungslampe, Verfahren zu deren Herstellung sowie entsprechende Entladungslampe
DE102010003381A1 (de) * 2010-03-29 2011-09-29 Osram Gesellschaft mit beschränkter Haftung Verfahren zum Bereitstellen einer Wechselstrom-Gasentladungslampe, Verfahren zum Bereitstellen von Licht mittels dieser Wechselstrom-Gasentladungslampe sowie Beleuchtungsvorrichtung mit dieser Wechselstrom-Gasentladungslampe
JP6292431B2 (ja) * 2012-08-24 2018-03-14 河北ライティングソリューションズ株式会社 放電ランプ用陰極
JP5812053B2 (ja) * 2013-04-24 2015-11-11 ウシオ電機株式会社 ショートアーク型放電ランプ
JP6361905B2 (ja) * 2013-09-12 2018-07-25 河北ライティングソリューションズ株式会社 放電ランプ用陰極

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DE20005764U1 (de) * 2000-03-30 2000-06-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Kurzbogenlampe

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DE3716485C1 (de) * 1987-05-16 1988-11-24 Heraeus Gmbh W C Xenon-Kurzbogen-Entladungslampe
JPH07235281A (ja) * 1994-02-23 1995-09-05 Toshiba Lighting & Technol Corp 直流放電灯および該放電灯を用いた半導体露光装置並びに映写装置
TW288151B (fr) * 1994-09-27 1996-10-11 Vshio Denki Kk
JP3646429B2 (ja) * 1995-09-29 2005-05-11 東芝ライテック株式会社 メタルハライドランプとその点灯装置および投光装置ならびにプロジェクタ装置
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JP3307291B2 (ja) * 1997-09-04 2002-07-24 松下電器産業株式会社 高圧水銀放電ランプ
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010028472A1 (de) 2010-05-03 2011-11-03 Osram Gesellschaft mit beschränkter Haftung Edelgas - Kurzbogen - Entladungslampe
EP2390902A1 (fr) 2010-05-03 2011-11-30 Osram Gesellschaft mit Beschränkter Haftung Lampe à décharge à gaz noble à arc court
WO2012004166A1 (fr) 2010-07-06 2012-01-12 Osram Gesellschaft mit beschränkter Haftung Lampe à décharge à arc court
DE102010030992A1 (de) 2010-07-06 2012-01-12 Osram Gesellschaft mit beschränkter Haftung Kurzbogenlampe-Entladungslampe

Also Published As

Publication number Publication date
US6573657B2 (en) 2003-06-03
CN1360333A (zh) 2002-07-24
EP1217644A1 (fr) 2002-06-26
US20020074943A1 (en) 2002-06-20
DE50114638D1 (de) 2009-02-26
JP4261795B2 (ja) 2009-04-30
TW527623B (en) 2003-04-11
KR20020050177A (ko) 2002-06-26
CN1316550C (zh) 2007-05-16
DE10063938A1 (de) 2002-07-04
CA2365357A1 (fr) 2002-06-20
JP2002260589A (ja) 2002-09-13
CA2365357C (fr) 2010-10-26

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