JPH02201860A - Metal halide lamp - Google Patents
Metal halide lampInfo
- Publication number
- JPH02201860A JPH02201860A JP2144189A JP2144189A JPH02201860A JP H02201860 A JPH02201860 A JP H02201860A JP 2144189 A JP2144189 A JP 2144189A JP 2144189 A JP2144189 A JP 2144189A JP H02201860 A JPH02201860 A JP H02201860A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- arc tube
- interference film
- metal halide
- light emitting
- 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.)
- Pending
Links
- 229910001507 metal halide Inorganic materials 0.000 title claims description 14
- 150000005309 metal halides Chemical class 0.000 title claims description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 26
- 239000011521 glass Substances 0.000 claims abstract description 22
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 3
- 229910052753 mercury Inorganic materials 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract description 4
- 229910052708 sodium Inorganic materials 0.000 abstract description 4
- 239000011734 sodium Substances 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000012634 fragment Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- -1 70W metal halide Chemical class 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- WOJONNYEZBXGHY-UHFFFAOYSA-N helium sodium Chemical compound [He].[Na] WOJONNYEZBXGHY-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は外管の破損を防止したメタルハライドランプに
関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a metal halide lamp whose outer bulb is prevented from being damaged.
従来の技術
メタルハライドランプは発光管内に封入した金属の発光
により高効率、高演色性という特長を持ち、従来広く使
用されてきた水銀ランプに変わるランプとして注目され
ている。近年では、低ワット化、コンパクト化が進み、
店舗照明等の屋内照明用に用いられる場合も増加してい
る。Conventional technology Metal halide lamps are characterized by high efficiency and high color rendering properties due to the light emitted from the metal sealed inside the arc tube, and are attracting attention as lamps that can replace the mercury lamps that have been widely used in the past. In recent years, lower wattage and compactness have progressed,
It is also increasingly being used for indoor lighting such as store lighting.
発明が解決しようとする課題
一般に、メタルハライドランプは低ワツトで小型のラン
プになるほど点灯中の発光管内の圧力は高くなる。すな
わち、屋内照明に使用される１００Ｗ以下のメタルハラ
イドランプでは点灯中の発光管内の圧力は１０気圧以上
にもなる。また、ランプを長時間点灯し電極のスパッタ
リング等により発光管内表面が黒化してくると、ランプ
電圧が上昇し、その結果ランプ電力も上昇して発光管内
の圧力が増加する。さらには、ランプ点灯中、発光管内
に封入されている金属と発光管の構成材料である石英と
が反応することにより、発光管の耐圧が低下する。これ
らの原因により、きわめて稀にではあるが、発光管が破
損し、その破片により外管が破損し飛散して、周囲の商
品等に損傷を与えることがある。Problems to be Solved by the Invention In general, the lower the wattage and the smaller the metal halide lamp, the higher the pressure inside the arc tube during lighting. That is, in a metal halide lamp of 100 W or less used for indoor lighting, the pressure inside the arc tube during lighting is as high as 10 atmospheres or more. Further, when the lamp is lit for a long time and the inner surface of the arc tube becomes black due to sputtering of the electrodes, the lamp voltage increases, and as a result, the lamp power also increases and the pressure inside the arc tube increases. Furthermore, during lighting of the lamp, the metal sealed in the arc tube reacts with quartz, which is a constituent material of the arc tube, thereby reducing the withstand pressure of the arc tube. Although extremely rare, due to these causes, the arc tube may break, and the outer tube may break and scatter due to fragments, causing damage to surrounding products.
従来、このような外管破損を防止する手段として、例え
ば実開昭５９−１２８１６３号公報に示されているよう
に、ランプ外管の外表面にふっ素樹脂を塗布したものが
知られている。しかしながら、ふっ素樹脂では使用可能
な外管温度が限度されてしまい、屋内照明に適したコン
パクトな外管形状のランプでは外管温度がふっ素樹脂の
使用可能な温度の上限を越えるため、その使用が困難で
あった。第４図に従来使用されているコンパクトな直管
形状の７０Ｗメタルハライドランプの一例を示す。第４
図において、１は内径９閣の石英製の発光管、２は外径
３０ｍの硬質ガラス製外管を示す。このような直管形状
のコンパクトランプは照明器具の小型化が可能なため、
特に屋内照明用ランプとして望まれているが、点灯時に
外管温度が３５０℃にもなる。このため、外管表面にふ
っ素樹脂を塗布すると、樹脂が高温により劣化するので
、外管破損を防止することはできなかった。Conventionally, as a means for preventing such damage to the outer bulb, a method is known in which a fluororesin is applied to the outer surface of the lamp outer bulb, as shown in, for example, Japanese Utility Model Application Publication No. 59-128163. However, the usable outer tube temperature of fluororesin is limited, and in compact outer tube-shaped lamps suitable for indoor lighting, the outer tube temperature exceeds the upper limit of the usable temperature of fluororesin, so its use is prohibited. It was difficult. FIG. 4 shows an example of a conventionally used compact straight tube-shaped 70W metal halide lamp. Fourth
In the figure, 1 is a quartz arc tube with an inner diameter of 9 m, and 2 is a hard glass outer tube with an outer diameter of 30 m. Compact lamps with a straight tube shape like this make it possible to downsize lighting equipment.
It is particularly desired as a lamp for indoor lighting, but the temperature of the outer bulb reaches 350° C. when lit. For this reason, when a fluororesin is applied to the surface of the outer tube, the resin deteriorates due to high temperatures, making it impossible to prevent damage to the outer tube.
また、特公昭４９−１２９８８号公報に示されているよ
うに、発光管の周囲をコイル状の金属線で取り囲む方法
や、特公昭５０−１７７９８号公報に示されているよう
に、発光管周囲にガラス筒を設ける方法も知られている
。In addition, as shown in Japanese Patent Publication No. 49-12988, there is a method of surrounding the arc tube with a coiled metal wire, and as shown in Japanese Patent Publication No. 50-17798, there is a method of surrounding the arc tube with a coiled metal wire. A method is also known in which a glass tube is provided in the tube.
しかしながら、メタルハライドランプの場合は、発光管
の周囲に電位の印加された金属があると、点灯中に封入
物であるナトリウムが発光管外へ消失するという現象が
発生する。これは、発光管から放射された紫外線により
金属から光電子が放出され、この光電子が発光管外表面
を負に帯電するため、発光管内のナトリウムイオンが発
光管外に消失するものである。このため、コイル状の金
属線を発光管の周囲に設けるためには、この金属線に電
位が印加されないような複雑な構造にする必要があり、
製造上問題となっていた。また、発光管の周囲にガラス
筒を設ける方法では、発光管が破損しその衝撃でガラス
筒も破損し、そのガラス筒の破片により外管も破損する
ことがあり、外管の破損を完全に防止することはできな
かった。However, in the case of a metal halide lamp, if there is a metal to which a potential is applied around the arc tube, a phenomenon occurs in which the sodium filler disappears out of the arc tube during lighting. This is because photoelectrons are emitted from the metal due to the ultraviolet rays emitted from the arc tube, and these photoelectrons negatively charge the outer surface of the arc tube, causing sodium ions inside the arc tube to disappear outside the arc tube. Therefore, in order to provide a coiled metal wire around the arc tube, it is necessary to create a complex structure that prevents the application of a potential to the metal wire.
There was a manufacturing problem. In addition, with the method of installing a glass tube around the arc tube, the arc tube is damaged and the glass tube is also damaged due to the impact, and the outer tube may also be damaged by the fragments of the glass tube. It could not be prevented.
課題を解決するための手段
この問題を解決するために本発明は、発光管を囲繞する
ガラス筒を設け、このガラス筒の表面に紫外線反射特性
を持つ多層干渉膜を有し、かつガラス筒の外周面に網目
状またはコイル状の金属線を付設したものである。Means for Solving the Problems In order to solve this problem, the present invention provides a glass tube surrounding the arc tube, has a multilayer interference film with ultraviolet reflecting properties on the surface of the glass tube, and A mesh or coiled metal wire is attached to the outer peripheral surface.
作用
網状またはコイル状の金属線により、発光管破損時の破
片は外管に衝突せず、このため外管の破損を防止するこ
とができる。Due to the working mesh or coiled metal wire, fragments of the arc tube will not collide with the outer tube when the arc tube breaks, thereby preventing damage to the outer tube.
また、発光管を囲繞するガラス筒の紫外線反射特性を持
つ多層干渉膜により、発光管から照射された紫外線は反
射され、金属線への紫外線の照射が阻止できるため、光
電子による発光管外へのナトリウム消失も発生しない。In addition, the glass tube surrounding the arc tube has a multilayer interference film that reflects ultraviolet light, which reflects the ultraviolet rays emitted from the arc tube and prevents the metal wires from being exposed to the ultraviolet rays. No sodium loss occurs either.
実施例
第１図は本発明の一実施例の７０Ｗメタルハライドラン
プを示す図である。第１図において、１は内径９ｍの石
英ガラス製の発光管であり、その内部には始動用ガスと
して２００トールのアルゴンと１３■の水銀のほかに、
Ｎａ１１．１ｍｇ。Embodiment FIG. 1 is a diagram showing a 70W metal halide lamp according to an embodiment of the present invention. In Fig. 1, reference numeral 1 is a quartz glass arc tube with an inner diameter of 9 m, and inside it, in addition to 200 Torr of argon and 13 mm of mercury as starting gases,
Na11.1mg.
ＴＱ ｒ ０．３ｍｇ、Ｔｍ１３０．７ｍｇ、Ｄｙ Ｉ
３０．７ｍｇ＋ ＨＯ１３０，７ｍｇの金属ハロゲン化
物が封入されている。２は硬質ガラス製の外管、３はゲ
ッタ、４は石英ガラス筒であり、外表面にはＴｉＯ２５
ｉ０２の多層干渉膜７が具備されている。５は網目状の
例えば鉄線等からなる金属線であり、６は口金である。TQ r 0.3 mg, Tm 130.7 mg, Dy I
30.7mg+HO130.7mg of metal halide is enclosed. 2 is an outer tube made of hard glass, 3 is a getter, and 4 is a quartz glass tube, the outer surface of which is coated with TiO25.
A multilayer interference film 7 of i02 is provided. 5 is a mesh-like metal wire made of, for example, iron wire, and 6 is a base.
金属線５の材質である鉄の仕事関数は４．８ｅＶである
ため、金属線５がら光電子を放出できる光の限界波長は
２６０ｎｍである。第２図に多層干渉膜７の塗布された
ガラス筒４の透過率特性を示す。第２図かられかるよう
に、多層干渉膜７の働きにより２８０ｎｍ以下の波長の
光はほぼ完全に反射されるため、光電子を放出できる限
界波長より波長の短い光は金属線５に照射されず、ナト
リウム消失は発生しない。Since the work function of iron, which is the material of the metal wire 5, is 4.8 eV, the limit wavelength of light at which photoelectrons can be emitted from the metal wire 5 is 260 nm. FIG. 2 shows the transmittance characteristics of the glass tube 4 coated with the multilayer interference film 7. As can be seen from FIG. 2, light with a wavelength of 280 nm or less is almost completely reflected by the action of the multilayer interference film 7, so that the metal wire 5 is not irradiated with light with a wavelength shorter than the limit wavelength at which photoelectrons can be emitted. , no sodium loss occurs.
このランプの寿命試験では、６０００時間点灯後の光束
維持率は８０％、ランプ電圧上昇は５Ｖと良好な特性を
示した。このランプを６０００時間点灯した後、過電力
を投入して発光管を破損させてみたところ、発光管およ
びガラス筒の破片は網目状の金属線によって外管に到達
するのが阻止され、外管の破損を完全に防止することが
できた。In a life test of this lamp, it showed good characteristics, with a luminous flux maintenance rate of 80% and a lamp voltage increase of 5 V after 6000 hours of lighting. After lighting this lamp for 6,000 hours, we tried to damage the arc tube by applying excessive power, and found that the fragments of the arc tube and glass tube were prevented from reaching the outer tube by the mesh-like metal wire. damage could be completely prevented.
なお、網目状金属線の網目の間隔が狭すぎると、ランプ
の全光束が減少し、一方網目の間隔が広すぎると、発光
管破損時の破片が通過してしまうため、外管破損を防止
することができない。実験によれば、網目の間隔は２〜
１０１ＩＩＩ！１が適当であった。Note that if the distance between the meshes of the mesh metal wire is too narrow, the total luminous flux of the lamp will decrease, while if the distance between the meshes is too wide, debris from the arc tube will pass through, preventing damage to the outer tube. Can not do it. According to experiments, the mesh spacing is 2~
101III! 1 was appropriate.
上記実施例では鉄製の金属線を使用した例を説明したが
、これ以外の材質のものでも、多層干渉膜の反射波長を
適正に設定すれば同様の効果が得られる。また、金属線
は第３図に示すようなコイル状のものであっても同様に
外管破損を防止できることはいうまでもない。In the above embodiment, an example was explained in which a metal wire made of iron was used, but the same effect can be obtained with a material made of other materials as long as the reflection wavelength of the multilayer interference film is appropriately set. Further, it goes without saying that even if the metal wire is in a coil shape as shown in FIG. 3, damage to the outer tube can be similarly prevented.
さらに、上記実施例では、ガラス筒の外表面に多層干渉
膜を塗布した場合について説明したが、ガラス筒の内表
面、あるいは内表面と外表面の両面に塗布しても同様の
効果が得られる。Furthermore, in the above embodiment, the case where the multilayer interference film was applied to the outer surface of the glass cylinder was explained, but the same effect can be obtained by applying it to the inner surface of the glass cylinder, or both the inner and outer surfaces. .
発明の詳細
な説明したように、本発明によれば、発光管とこれを内
蔵した外管と発光管を囲繞したガラス筒とを具備したメ
タルハライドランプにおいて、ガラス筒は表面に紫外線
反射特性を持つ多層干渉膜を有し、かつ外周面に網目状
またはコイル状の金属線が付設されることによって、ナ
１ヘリウム消失が発生することなく外管の破損を防止す
ることができるものである。As described in detail, according to the present invention, in a metal halide lamp comprising an arc tube, an outer tube containing the arc tube, and a glass tube surrounding the arc tube, the glass tube has a surface that reflects ultraviolet light. By having a multilayer interference film and having a mesh-like or coil-like metal wire attached to the outer peripheral surface, it is possible to prevent damage to the outer tube without causing loss of sodium helium.
第１図は本発明の一実施例であるメタルハライドランプ
の正面図、第２図は本発明にかかる多層干渉膜付きガラ
ス筒の透過率特性図、第３図は本発明の他の実施例のガ
ラス筒の斜視図、第４図は従来のメタルハライドランプ
の正面図である。
１・・・・・・発光管、２・・・・・・外管、３・・・
・・・ゲッタ、４・・・・・・ガラス筒、５・・・・・
・金属線、６・・・・・・口金、７・・・・・・多層干
渉膜。
代理人の氏名 弁理士 粟野重孝 ほか１名ｔ−４，屹
菅
２−一一夕に１Ｆ
３−−−ゲッタ
７・−９９鷹千シ参Ｒ更
第２図
ジｋ （ヒ くｎ制
第
図
第
図FIG. 1 is a front view of a metal halide lamp according to an embodiment of the present invention, FIG. 2 is a transmittance characteristic diagram of a glass tube with a multilayer interference film according to the present invention, and FIG. 3 is a diagram of another embodiment of the present invention. FIG. 4 is a perspective view of a glass tube and a front view of a conventional metal halide lamp. 1... Arc tube, 2... Outer tube, 3...
...Getta, 4...Glass tube, 5...
・Metal wire, 6...cap, 7...multilayer interference film. Name of agent: Patent attorney Shigetaka Awano and one other person t-4, Tosuga 2-Ichiyo ni 1F 3--Getta 7. Figure diagram
Claims (1)
ゲン化物を封入した発光管と、この発光管を内蔵した外
管と、前記発光管を囲繞したガラス筒とを具備し、前記
ガラス筒は表面に紫外線反射特性を持つ多層干渉膜を有
し、かつ外周面に網目状またはコイル状の金属線が付設
されていることを特徴とするメタルハライドラップ。The lamp includes an arc tube having a pair of main electrodes and mercury, a rare gas, and a metal halide sealed inside, an outer tube containing the arc tube, and a glass tube surrounding the arc tube. is a metal halide wrap characterized by having a multilayer interference film with ultraviolet reflective properties on its surface, and having a mesh-like or coil-like metal wire attached to its outer peripheral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2144189A JPH02201860A (en) | 1989-01-31 | 1989-01-31 | Metal halide lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2144189A JPH02201860A (en) | 1989-01-31 | 1989-01-31 | Metal halide lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02201860A true JPH02201860A (en) | 1990-08-10 |
Family
ID=12055053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2144189A Pending JPH02201860A (en) | 1989-01-31 | 1989-01-31 | Metal halide lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02201860A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5402033A (en) * | 1991-12-23 | 1995-03-28 | Philips Electronics North America Corporation | High pressure discharge lamp having clamped-on containment sleeve |
| US5471110A (en) * | 1991-12-23 | 1995-11-28 | Philips Electronics North America Corporation | High pressure discharge lamp having filament electrodes |
| US5532543A (en) * | 1991-12-23 | 1996-07-02 | Philips Electronics North America Corporation | High density discharge lamp with pinched-on containment shield |
| EP0727813A3 (en) * | 1995-02-14 | 1996-11-06 | Gen Electric | UV radiation-absorbing coatings |
| WO2003030209A1 (en) * | 2001-10-01 | 2003-04-10 | Koninklijke Philips Electronics N.V. | Ceramic hid lamp |
| JP2007194063A (en) * | 2006-01-19 | 2007-08-02 | Osram Melco Toshiba Lighting Kk | High-pressure discharge lamp and lighting device |
| JP2014107109A (en) * | 2012-11-27 | 2014-06-09 | Gs Yuasa Corp | Fixing tool and high pressure discharge lamp |
-
1989
- 1989-01-31 JP JP2144189A patent/JPH02201860A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5402033A (en) * | 1991-12-23 | 1995-03-28 | Philips Electronics North America Corporation | High pressure discharge lamp having clamped-on containment sleeve |
| US5471110A (en) * | 1991-12-23 | 1995-11-28 | Philips Electronics North America Corporation | High pressure discharge lamp having filament electrodes |
| US5532543A (en) * | 1991-12-23 | 1996-07-02 | Philips Electronics North America Corporation | High density discharge lamp with pinched-on containment shield |
| EP0727813A3 (en) * | 1995-02-14 | 1996-11-06 | Gen Electric | UV radiation-absorbing coatings |
| WO2003030209A1 (en) * | 2001-10-01 | 2003-04-10 | Koninklijke Philips Electronics N.V. | Ceramic hid lamp |
| JP2007194063A (en) * | 2006-01-19 | 2007-08-02 | Osram Melco Toshiba Lighting Kk | High-pressure discharge lamp and lighting device |
| JP2014107109A (en) * | 2012-11-27 | 2014-06-09 | Gs Yuasa Corp | Fixing tool and high pressure discharge lamp |
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