WO2009133773A1 - 超高圧水銀ランプ用電極及び超高圧水銀ランプ - Google Patents
超高圧水銀ランプ用電極及び超高圧水銀ランプ Download PDFInfo
- Publication number
- WO2009133773A1 WO2009133773A1 PCT/JP2009/057571 JP2009057571W WO2009133773A1 WO 2009133773 A1 WO2009133773 A1 WO 2009133773A1 JP 2009057571 W JP2009057571 W JP 2009057571W WO 2009133773 A1 WO2009133773 A1 WO 2009133773A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- coil
- tungsten
- pressure mercury
- tip
- Prior art date
Links
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 18
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 13
- 239000010937 tungsten Substances 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000010410 layer Substances 0.000 description 7
- 238000010891 electric arc Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000010128 melt processing Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
- H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2026—Gas discharge type light sources, e.g. arcs
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49204—Contact or terminal manufacturing
Definitions
- the present invention relates to an electrode for an ultrahigh pressure mercury lamp, an ultrahigh pressure mercury lamp using the same, and a method for producing an electrode for an ultrahigh pressure mercury lamp.
- a light source device composed of an ultra-high pressure mercury lamp combined with a reflecting mirror, commonly called a short arc discharge lamp, has been widely used as a light source for a projector device or a projector.
- a projector device is required to have sufficient brightness on a screen, and therefore a light source close to a point light source is necessary, and a short arc discharge lamp is mainly used as a lamp.
- the lamp has a short arc, the consumption of the electrode becomes significant due to a decrease in lamp voltage and an increase in lamp current.
- FIG. 1 An example of a conventional electrode is shown in FIG.
- the electrode shown in the figure is usually composed of an electrode mandrel 4 made of tungsten and a coil 5 made of tungsten, and the relationship between the electrode mandrel and the thickness of the coil is limited within a certain range because the coil is wound around the electrode mandrel. Therefore, an extremely thick coil cannot be wound around the electrode mandrel. Therefore, the coil 5a is wound once on the tip end side of the electrode mandrel 4, and the double wound from the coil 5b portion is used as an elementary electrode, and the tip of the electrode is generally heated and melted and used as an electrode. In that case, there is an example in which the shape of the melted portion at the tip of the electrode is controlled by changing the wire diameter of the coil wound around the electrode mandrel, so-called thickness (for example, Patent Document 1).
- the electrode since there is an electrode coil portion that is not sufficiently melted in the molten dome at the tip of the electrode, the electrode temperature distribution in the molten dome becomes non-uniform, and the discharge becomes unstable. Therefore, it is desirable for the electrode to have a state in which the electrode coil portion included in the melting dome at the tip of the electrode is sufficiently melted as shown in FIG.
- An object of the present invention is to maintain a stable arc discharge when the lamp is lit and to provide uniform brightness without flickering of the lamp.
- the first aspect of the present invention is a tungsten electrode for an ultrahigh pressure mercury lamp.
- the tungsten electrode includes an electrode mandrel, a first coil wound around the tip end of the electrode mandrel, and a second coil wound from the end of winding of the first coil, and constitutes the first coil.
- the wire diameter of the tungsten wire is smaller than the wire diameter of the tungsten wire constituting the second coil.
- the tip end side of the electrode mandrel and the first coil are melt processed to form the electrode tip.
- the first coil is wound around a plurality of layers.
- the second aspect of the present invention is an ultra-high pressure mercury lamp in which the tungsten electrode of the first aspect is disposed oppositely in the arc tube.
- the third aspect of the present invention is a method for producing a tungsten electrode for an ultrahigh pressure mercury lamp.
- This manufacturing method includes a step of winding a first coil around an electrode mandrel, a step of winding a second coil from the end of winding of the first coil, and melting the tip side of the electrode mandrel and the first coil. It consists of a step of forming an electrode tip, and the wire diameter of the tungsten wire constituting the first coil is smaller than the wire diameter of the tungsten wire constituting the second coil.
- the first coil is wound in a plurality of layers.
- the wire diameter of the tungsten wire wound around the electrode mandrel on the melt processing side of the electrode tip is reduced, and after the end of winding of the coil, a tungsten wire having a thicker wire diameter than that of the tungsten wire wound around the tip end is
- An electrode for an ultrahigh pressure mercury lamp in which a coil portion having a thin wire diameter of a tungsten wire is mainly melt-processed and a lamp using the same are wound around as a coil.
- FIG. 1 is a view showing an example of a so-called elementary electrode before melting the tip of an electrode used in an ultrahigh pressure mercury lamp according to the present invention
- FIG. 2 is an example of a state in which the electrode of FIG. 1 is melt processed.
- a thin coil 2 made of tungsten wire is wound on the electrode mandrel 1 as a coil layer on the tip side of the electrode, and is wound in a single layer, double layer or triple layer.
- a coil 3 made of tungsten wire is wound twice.
- the coils are wound from one to three in each wire diameter.
- the number of coil turns and the number of coil stacks can be appropriately designed according to lamp power and the like. .
- the number of coil turns indicates the number of turns of a tungsten wire wound around the electrode mandrel, and a so-called wound coil layer in which the coils are overlapped is called single or double.
- FIG. 6 shows an example in which a thin coil is wound on the electrode tip side, and then a thick coil is wound twice.
- FIG. 7 shows a view in which a thin coil and a thick coil are respectively wound twice. The size of the melted part when the electrode tip is melted by changing the coil layer of the thin coil wound around the electrode tip as shown in FIGS. 6 and 7, or by changing the number of turns (not shown). Can be adjusted.
- FIG. 1 is melted by arc discharge or laser irradiation to form a melting dome at the tip of the electrode.
- FIG. 2 shows the appearance in this state. At this time, it is desirable that a part of the tip side of the coil 3 is melted.
- the ultrahigh pressure mercury lamp of the present invention includes a pair of electrodes having the shape shown in FIG. 2 in a discharge vessel, and, for example, 0.1 to 0.3 mg / mm 3 of mercury and halogen, and The experiment was conducted with a 150 W arc tube in which a rare gas was enclosed and the distance between the electrodes was selected to be 2.0 mm or less.
- FIG. 8 shows the arc tube provided with the electrode of the present invention incorporated in a reflecting mirror and added with a starting external auxiliary conductor.
- the gap between the coil wires is small by using a thin tungsten wire as the coil as in the lamp having the above configuration, when the tungsten wire coil portion having a thin wire diameter is melt-processed, the coil-to-coil The heat conduction of the dome is improved and there is no unmelted coil in the dome. Further, by using a thin tungsten wire as the coil, the volume of the molten dome can be finely adjusted by the number of coil turns. Further, by using a thin tungsten wire as the coil, energy adjustment in the melting process is facilitated, and unnecessary melting is eliminated as compared with a thick tungsten wire.
- Electrode mandrel 1a Electrode mandrel tip 2 Thin wire diameter coil 3 Slightly thick wire diameter coil 4 Electrode mandrel 5 Coil 5a Single winding coil 5b Double winding coil
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Discharge Lamp (AREA)
Abstract
Description
一般にプロジェクタ装置は、スクリーン上で十分な明るさを要求され、そのため点光源に近い光源が必要であり、ランプはショートアーク放電ランプが主に用いられる。しかしながら、ランプは短アークにすることにより、ランプ電圧の低下、ランプ電流の増大を招く事等により電極の消耗が著しくなる。
したがって、電極としては、その断面が図5のように電極先端の溶融ドーム内に含まれる電極コイル部が十分溶融している状態が望ましい。
ここで、電極心棒の先端側及び第1のコイルが溶融加工されて電極先端が形成されるようにした。
また、第1のコイルが複数層巻きまわされることが好ましい。
ここで、電極心棒に第1のコイルを巻きまわす工程において、第1のコイルが複数層巻きまわされることが好ましい。
以下に、本発明の形態を実施例に基づき図面を用いて説明する。
なお、本発明の電極を備えた前記発光管を反射鏡に組み込み、始動用の外部補助導体を付加したものを図8に示す。
また、コイルとして細いタングステン線を用いることにより、コイル巻き数により溶融ドームの容積の微妙な調節が可能となる。
さらに、コイルとして細いタングステン線を用いることにより、溶融加工におけるエネルギー調節が容易になり、太いタングステン線に比べて不要な溶融が無くなる。
以上のごとく、本発明の電極を用いることにより、電極状態が均一となり、明るさが一定で、チラツキの少ない放電灯を供給することができる。
1a 電極心棒先端
2 細い線径のコイル
3 やや太い線径のコイル
4 電極心棒
5 コイル
5a 一重巻きコイル
5b 二重巻きコイル
Claims (6)
- 超高圧水銀ランプ用のタングステン電極であって、
電極心棒、該電極心棒の先端側に巻きまわされた第1のコイル、及び該第1のコイルの巻き終わりから巻きまわされた第2のコイルからなり、
前記第1のコイルを構成するタングステン線の線径が前記第2のコイルを構成するタングステン線の線径よりも小さいタングステン電極。 - 請求項1のタングステン電極において、前記電極心棒の先端側及び前記第1のコイルが溶融加工されて電極先端が形成されたタングステン電極。
- 請求項1のタングステン電極において、前記第1のコイルが複数層巻きまわされたタングステン電極。
- 一対の請求項1記載のタングステン電極が発光管内で対向配置された超高圧水銀ランプ。
- 超高圧水銀ランプ用のタングステン電極の製造方法であって、
電極心棒の先端側に第1のコイルを巻きまわす工程、
前記第1のコイルの巻き終わりから第2のコイルを巻きまわす工程、及び
前記電極心棒の先端側及び前記第1のコイルを溶融加工して電極先端を形成する工程
からなり、
前記第1のコイルを構成するタングステン線の線径が前記第2のコイルを構成するタングステン線の線径よりも小さい製造方法。 - 請求項5の製造方法において、
前記電極心棒に第1のコイルを巻きまわす工程において、前記第1のコイルが複数層巻きまわされる製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2721636A CA2721636C (en) | 2008-04-30 | 2009-04-15 | Electrode for ultra-high pressure mercury lamp and ultra-high pressure mercury lamp |
JP2010510080A JP4736143B2 (ja) | 2008-04-30 | 2009-04-15 | 超高圧水銀ランプ用電極及び超高圧水銀ランプ |
US12/989,504 US20110037385A1 (en) | 2008-04-30 | 2009-04-15 | Electrode for ultra-high pressure mercury lamp and ultra-high pressure mercury lamp |
EP09738710A EP2278610A4 (en) | 2008-04-30 | 2009-04-15 | ELECTRODE FOR A ULTRA-HIGH-PRESSURE MERCURY LAMP AND ULTRA-HIGH-PRECISION MERCURY LAMP |
CN2009801154235A CN102017061B (zh) | 2008-04-30 | 2009-04-15 | 用于超高压汞灯的电极以及超高压汞灯 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008118074 | 2008-04-30 | ||
JP2008-118074 | 2008-04-30 |
Publications (1)
Publication Number | Publication Date |
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WO2009133773A1 true WO2009133773A1 (ja) | 2009-11-05 |
Family
ID=41254992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/057571 WO2009133773A1 (ja) | 2008-04-30 | 2009-04-15 | 超高圧水銀ランプ用電極及び超高圧水銀ランプ |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110037385A1 (ja) |
EP (1) | EP2278610A4 (ja) |
JP (1) | JP4736143B2 (ja) |
CN (1) | CN102017061B (ja) |
CA (1) | CA2721636C (ja) |
WO (1) | WO2009133773A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012063151A1 (en) * | 2010-11-10 | 2012-05-18 | Koninklijke Philips Electronics N.V. | Method of manufacturing an electrode for a gas discharge lamp. |
JP2018107059A (ja) * | 2016-12-28 | 2018-07-05 | 株式会社オーク製作所 | ショートアーク型放電ランプ |
CN111725039A (zh) * | 2019-03-20 | 2020-09-29 | 上海亚尔光源有限公司 | 一种大功率气体放电灯电极弹簧的制造方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016140610A1 (en) * | 2015-03-02 | 2016-09-09 | Profoto Ab | Flash tube providing a flat peak synchronized output |
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JPH07130330A (ja) * | 1993-09-13 | 1995-05-19 | Matsushita Electron Corp | メタルハライドランプ |
JP2001110355A (ja) * | 1999-10-13 | 2001-04-20 | Takeishi Denki Kk | 放電灯電極 |
JP2007052973A (ja) * | 2005-08-17 | 2007-03-01 | Iwasaki Electric Co Ltd | セラミックランプ |
JP2007273174A (ja) | 2006-03-30 | 2007-10-18 | Matsushita Electric Ind Co Ltd | 高圧放電ランプ用電極、当該電極の製造方法及び高圧放電ランプの製造方法 |
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2009
- 2009-04-15 JP JP2010510080A patent/JP4736143B2/ja not_active Expired - Fee Related
- 2009-04-15 CA CA2721636A patent/CA2721636C/en not_active Expired - Fee Related
- 2009-04-15 CN CN2009801154235A patent/CN102017061B/zh not_active Expired - Fee Related
- 2009-04-15 WO PCT/JP2009/057571 patent/WO2009133773A1/ja active Application Filing
- 2009-04-15 US US12/989,504 patent/US20110037385A1/en not_active Abandoned
- 2009-04-15 EP EP09738710A patent/EP2278610A4/en not_active Withdrawn
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JP2001110355A (ja) * | 1999-10-13 | 2001-04-20 | Takeishi Denki Kk | 放電灯電極 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012063151A1 (en) * | 2010-11-10 | 2012-05-18 | Koninklijke Philips Electronics N.V. | Method of manufacturing an electrode for a gas discharge lamp. |
US9053922B2 (en) | 2010-11-10 | 2015-06-09 | Koninklijke Philips N.V. | Method of manufacturing an electrode for a gas discharge lamp |
JP2018107059A (ja) * | 2016-12-28 | 2018-07-05 | 株式会社オーク製作所 | ショートアーク型放電ランプ |
CN111725039A (zh) * | 2019-03-20 | 2020-09-29 | 上海亚尔光源有限公司 | 一种大功率气体放电灯电极弹簧的制造方法 |
CN111725039B (zh) * | 2019-03-20 | 2023-03-31 | 上海亚尔精密零件制造有限公司 | 一种大功率气体放电灯电极弹簧的制造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN102017061A (zh) | 2011-04-13 |
EP2278610A4 (en) | 2013-01-02 |
US20110037385A1 (en) | 2011-02-17 |
CA2721636A1 (en) | 2009-11-05 |
CN102017061B (zh) | 2013-03-27 |
JPWO2009133773A1 (ja) | 2011-09-01 |
JP4736143B2 (ja) | 2011-07-27 |
EP2278610A1 (en) | 2011-01-26 |
CA2721636C (en) | 2013-12-31 |
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