JPH02304855A - Low pressure electric discharge lamp - Google Patents
Low pressure electric discharge lampInfo
- Publication number
- JPH02304855A JPH02304855A JP12432089A JP12432089A JPH02304855A JP H02304855 A JPH02304855 A JP H02304855A JP 12432089 A JP12432089 A JP 12432089A JP 12432089 A JP12432089 A JP 12432089A JP H02304855 A JPH02304855 A JP H02304855A
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- metal cylinder
- metal
- metal rod
- low
- 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
- 229910052751 metal Inorganic materials 0.000 claims abstract description 62
- 239000002184 metal Substances 0.000 claims abstract description 62
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 8
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 241001116389 Aloe Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 235000011399 aloe vera Nutrition 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
Landscapes
- Discharge Lamp (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、低圧放電灯に係り、特にバックライト用蛍光
ランプのような細径の低圧放電灯に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a low-pressure discharge lamp, and particularly to a small-diameter low-pressure discharge lamp such as a fluorescent lamp for a backlight.
熱陰極放電灯および冷陰極放電灯については。 For hot cathode discharge lamps and cold cathode discharge lamps.
照明学会線の照明ハンドブック（昭和５３年５月。Illumination Institute of Japan's Lighting Handbook (May 1978).
オーム社）の第７５９頁から第７６０頁に記載されてい
る。また、冷陰極形の蛍光灯については。Ohmsha), pages 759 to 760. Also, regarding cold cathode fluorescent lamps.
同じ文献の第１６０頁に記載されている。また、熱陰極
の構造については、照明学会線のライティングハンドブ
ック（昭和６２年１１月、オーム社）の第１２１頁に記
載されている。It is described on page 160 of the same document. Further, the structure of the hot cathode is described on page 121 of the Illuminating Engineering Society's Lighting Handbook (November 1988, Ohmsha).
〔発明が解決しようとする課題〕
上部従来技術の熱陰極形低圧放電灯においては、電極降
下が小さいため高効率であるが寿命が短いという欠点が
あった。特に、放電容器の寸法が小さい場合には、電極
の寸法が小さくなるため寿命は特に短くなる。また、冷
陰極形低圧放電灯は、長寿命であるが、陰極降下電圧が
高く、したがって効率が低いという欠点があった。さら
に、放電電流が１０ｍＡ以上においては、寿命も短いと
いう欠点があった。[Problems to be Solved by the Invention] The hot cathode type low pressure discharge lamps of the above-mentioned prior art have high efficiency due to small electrode drop, but have the disadvantage of short lifespan. In particular, when the dimensions of the discharge vessel are small, the lifespan is particularly short due to the small dimensions of the electrodes. Further, although cold cathode type low pressure discharge lamps have a long life, they have a drawback of high cathode drop voltage and therefore low efficiency. Furthermore, when the discharge current is 10 mA or more, the service life is short.
本発明の目的は、管端部の構造が単純で、高効率で、長
寿命である低圧放電灯を提供することである。An object of the present invention is to provide a low-pressure discharge lamp with a simple tube end structure, high efficiency, and long life.
上記目的は、少なくとも金属円筒内に非同軸に金属棒を
挿入した構造を特徴とする電極を、一対設けることによ
って達成される。さらに、前記金属円筒の内面と前記金
属棒の外表面との最大距離りを、０．５ｍｍから２．０
ｍｍの範囲にし、前記金属円筒の内面および前記金属棒
の外面の少なくとも一方にジルコニウムを含むゲッター
を設け、あるいは前記金属円筒の内面および前記金属棒
の外面の少なくとも一方に電子放射物質としてＢａｚＣ
ａｌＯｅ ｔＢ ａａＹｚＷＯｅ、 ５ Ｂ ａ ０
・２Ａ ｌｚｏｇ、Ｌ ａ Ｂｓ。The above object is achieved by providing at least a pair of electrodes characterized by a structure in which a metal rod is inserted non-coaxially into a metal cylinder. Furthermore, the maximum distance between the inner surface of the metal cylinder and the outer surface of the metal rod is set from 0.5 mm to 2.0 mm.
mm range, and at least one of the inner surface of the metal cylinder and the outer surface of the metal rod is provided with a getter containing zirconium, or at least one of the inner surface of the metal cylinder and the outer surface of the metal rod is provided with BazC as an electron emitting material.
alOe tB aaYzWOe, 5 B a 0
・2A lzog, L a Bs.
ＭｇＯの中から選ばれた少なくとも一種を塗布し、さら
に前記金属円筒の外表面の少なくとも一部の放射率を大
きくした構造にすることにより、上記目的はよりいっそ
う達成される。The above object can be further achieved by applying at least one type selected from MgO and further increasing the emissivity of at least a portion of the outer surface of the metal cylinder.
少なくとも金属円筒内に非同軸に金属棒を挿入した構造
を特徴とする電極を一対もうけると、グローが前記金属
円筒内と金属棒の間に作られた隙間にはいり、いわゆる
ホロー陰極効果によって陰極降下電圧が低下し、陰極損
失が低下するので。When a pair of electrodes is provided, which has a structure in which a metal rod is inserted non-coaxially into a metal cylinder, the glow enters the gap created between the metal cylinder and the metal rod, and the cathode falls due to the so-called hollow cathode effect. As the voltage decreases and the cathode loss decreases.
高効率の低圧放電灯が得られる。さらに、前記金属円筒
の内面と前記金属棒の外表面との最大距離りが、０．５
ｍから２．０ｎｏの範囲にすると、グローは安定に前記
はきまに入る。０．５ｍｍ以下においてはグローが示ロ
ー内に入りくくなり、２．０−以上においてはホロー陰
極降下が無くなる。A highly efficient low pressure discharge lamp can be obtained. Furthermore, the maximum distance between the inner surface of the metal cylinder and the outer surface of the metal rod is 0.5
When the range is from m to 2.0no, the glow stably enters the gap. If it is less than 0.5 mm, it becomes difficult for the glow to enter the indicator, and if it is more than 2.0 mm, the hollow cathode drop disappears.
前記金属円筒の内面、外面および前記金属棒の外面の少
なくとも一方にジルコニウムを含むゲッターを設けると
、不純ガスが効率良く吸収されるので、長寿命が得られ
る。When a getter containing zirconium is provided on at least one of the inner and outer surfaces of the metal cylinder and the outer surface of the metal rod, impurity gas is efficiently absorbed, resulting in a long life.
前記金属円筒の内面、外面および前記金＠棒の外面の少
なくとも一方に電子放射物質としてＢ ａ ２Ｃａ Ｗ
Ｏｓ、 Ｂ ａ ａＹｚＷＯｅｙ ５ Ｂ ａｏ・２Ａ
１２０１１． Ｌ ａ Ｂｅ、 ＭｇＯの中から選ば
れた少なくとも一種を塗布すると、二次電子放出効果が
大きくなり、陰極降下電圧が低下し、高効率が得られる
。さらに、これらの物質は空気中で安定で、活性化も不
要なので、電極を高周波加熱などをする必要が無く、ラ
ンプ製造が簡単になるという利点が生じる。B a 2Ca W as an electron emitting substance on at least one of the inner and outer surfaces of the metal cylinder and the outer surface of the gold rod.
Os, B a aYzWOey 5 B ao・2A
12011. When at least one selected from L a Be and MgO is applied, the secondary electron emission effect increases, the cathode drop voltage decreases, and high efficiency is obtained. Furthermore, since these substances are stable in air and do not require activation, there is no need for high-frequency heating of the electrodes, which provides the advantage of simplifying lamp manufacture.
前記金属円筒の外表面の少なくとも一部の放射率を大き
くした構造にすることにより、熱の放射が大きくなって
、前記金属円筒の温度が低下し。By increasing the emissivity of at least a portion of the outer surface of the metal cylinder, heat radiation is increased and the temperature of the metal cylinder is lowered.
ホロー内の希ガスの密度が大きくなり、従って陰極から
飛散した電極物質が陰極に押し戻されるため、陰極の損
耗が少なくなって長寿命電極が得られる。上記の効果は
、前記金嵐板の外表面の放射率が０．５ 以上の時に特
に大きくなった。The density of the rare gas in the hollow is increased, and therefore the electrode material scattered from the cathode is pushed back to the cathode, resulting in less wear and tear on the cathode, resulting in a long-life electrode. The above effect was especially great when the emissivity of the outer surface of the gold storm plate was 0.5 or more.
上記の効果は、放電用ガスの主成分を希ガスとし、希ガ
スの原子量をＭとするときＴｏｒｒで表した希ガスの圧
力が２８０／Ｍ以上で２０００／Ｍ以下にすることによ
り、よりいっそう達成される。The above effects can be further improved by using a rare gas as the main component of the discharge gas, and by setting the pressure of the rare gas expressed in Torr to 280/M or more and 2000/M or less, where M is the atomic weight of the rare gas. achieved.
第１図に、本発明の第１の実施例を示す。直管状の放電
容器４の両端に、陰極１，２が封入されており、陰極１
，２はそれぞれ１本のリード線５゜６に接続されている
。リード線が１本なので、放射管の管端の構造が単純に
なり、製造が簡単であるという利点が生じる。管端の構
造が単純であるという利点は、放電管の内径が８ｒｍ以
下の場合に、その効果が大になる。FIG. 1 shows a first embodiment of the invention. Cathodes 1 and 2 are sealed at both ends of a straight tube-shaped discharge vessel 4.
, 2 are each connected to one lead wire 5.6. Since there is only one lead wire, the structure of the tube end of the radiation tube is simple, which has the advantage of being easy to manufacture. The advantage of the simple structure of the tube end becomes greater when the inner diameter of the discharge tube is 8 rm or less.
第１図の実施例に使用した電極の側断面図および縦断面
図を、それぞれ第２図（ａ）および（ｂ）に示す。内直
径２．３ｍ長さ６Ｉの鉄−ニッケル合金からなる金属円
筒１１に直径０．８ｍ＋＋の鉄−ニッケル合金からなる
金属棒１０が非同軸に挿入されており、金属円筒１１の
先端部を押しつぶすことによって金属円筒１１は金属棒
１０に固定されている。金属円筒１１内側および金属棒
１ｏの表面にジルコニウムをふくむゲッター１５が塗布
されている。金属円筒１１の内面と金属棒１０の間の距
離りは、ジルコニウムや電子放射物質が塗布された場合
には、原理上、ジルコニウムや電子放射物質の塗布膜表
面間の距離と定義する。この実施例では、ゲッターの塗
布膜厚が０．０５画なので金属円筒１１の内面と金属棒
１０の表面の最大距離りは１．６画である。A side cross-sectional view and a vertical cross-sectional view of the electrode used in the example of FIG. 1 are shown in FIGS. 2(a) and 2(b), respectively. A metal rod 10 made of an iron-nickel alloy with a diameter of 0.8 m++ is inserted non-coaxially into a metal cylinder 11 made of an iron-nickel alloy with an inner diameter of 2.3 m and a length of 6I, and crushes the tip of the metal cylinder 11. The metal cylinder 11 is thereby fixed to the metal rod 10. A getter 15 containing zirconium is coated on the inside of the metal cylinder 11 and on the surface of the metal rod 1o. In principle, the distance between the inner surface of the metal cylinder 11 and the metal rod 10 is defined as the distance between the surfaces of the coated film of zirconium or electron emitting material when zirconium or electron emitting material is applied thereto. In this embodiment, since the coating thickness of the getter is 0.05 strokes, the maximum distance between the inner surface of the metal cylinder 11 and the surface of the metal rod 10 is 1.6 strokes.
放電管１の内面の少なくとも一部に、蛍光体３が塗布さ
れている。蛍光体塗布膜３が存在する場合には、電極１
，２を挿入する際に電極１，２が蛍光体膜３に接触し蛍
光体が脱落したり、管端の黒化がより目たつので、一つ
の電極に１本のリード線を設けた方式が、特に有利にな
る。A phosphor 3 is coated on at least a portion of the inner surface of the discharge tube 1. When the phosphor coating film 3 is present, the electrode 1
, 2, when electrodes 1 and 2 come into contact with the phosphor film 3, the phosphor may fall off, and the blackening of the tube end becomes more noticeable. is especially advantageous.
第１図において、放電管４を内径５．７ｍｍ、長さ２７
０ｍのソーダガラス管とし、内面に蛍光体３として希土
類蛍光体Ｙ２Ｏ３： Ｅ ｕ ｒ ＭｇＡＱ １１０１
９： Ｃｅ、Ｔｂ、３Ｓ ｚｓ（Ｐｏｔ）ｚ・ＣａＣＱ
ｚの混合物を塗布した。放電用ガスは、１０Ｔｏｒｒの
アルゴンと水銀蒸気である。In Fig. 1, the discharge tube 4 has an inner diameter of 5.7 mm and a length of 27 mm.
0m soda glass tube, with rare earth phosphor Y2O3 as phosphor 3 on the inner surface: Eur MgAQ 1101
9: Ce, Tb, 3S zs(Pot)z・CaCQ
A mixture of z was applied. The discharge gas is argon and mercury vapor at 10 Torr.
上記の本発明の低圧放電灯を３０ｋＨｚ、２０ｍＡの放
電電流で点灯したところ、陰極降下電圧は、Ｌが２．５
Ｉの場合より２０％低下し、Ｌが０．１ｍｍの場合より
３０％低下し、高効率蛍光ランプが得られた。また、金
属＄１１１１０はホロー１２部で発生した熱を効率良く
管端に逃すので、電極の温度が低下し、長寿命が得られ
る。更に、放電は電極の先端部ではなく、後端部から生
じるので蛍光ランプの後端部まで光という利点が生じる
。When the above low pressure discharge lamp of the present invention was lit at 30kHz and a discharge current of 20mA, the cathode drop voltage was 2.5L.
It was 20% lower than in the case of I and 30% lower than in the case of L of 0.1 mm, and a high-efficiency fluorescent lamp was obtained. In addition, since the metal $11110 efficiently releases the heat generated in the hollow 12 portion to the tube end, the temperature of the electrode decreases and a long life can be obtained. Furthermore, since the discharge occurs from the rear end of the electrode rather than the front end, there is an advantage that light reaches the rear end of the fluorescent lamp.
第二の実施例の電極の側断面図および縦断面図を、それ
ぞれ第３図（ａ）および（ｂ）に示す。A side sectional view and a longitudinal sectional view of the electrode of the second embodiment are shown in FIGS. 3(a) and 3(b), respectively.
第一の実施例の電極においてゲッター１５の代わりに電
子放射物質ＢａｘｃａＷＯｓ２１を塗布し、金属円筒１
１の外面にコージェライト（２Ｍ ｇｏ・２ＡｌｚＯａ
・５ＳｉＯｚ）２０の粉末を水ガラスをバインダーにし
て塗布したもハである０通常の鉄−ニッケル合金の波長
数μｍ〜数十μｍにおける放射率が０．３ 以下である
のに対して、コージェライトの放射率は０．８ 程度は
あるので、熱の放射が大きく、金属円筒の温度が低下し
、電極が長寿命になった。また、コージェライト、水ガ
ラスは電気絶縁物であるので、放電始動時にグローは確
実にホロー１２内に入り、安定な放電が得られた。In the electrode of the first embodiment, an electron emitting substance BaxcaWOs 21 is applied instead of the getter 15, and the metal cylinder 1
Cordierite (2M go・2AlzOa) on the outer surface of 1
・5SiOz)20 powder is coated with water glass as a binder.0While the emissivity of ordinary iron-nickel alloys at wavelengths of several μm to several tens of μm is 0.3 or less, cojet Since the light has an emissivity of about 0.8, it radiates a large amount of heat, lowering the temperature of the metal cylinder and extending the life of the electrode. Furthermore, since cordierite and water glass are electrical insulators, the glow reliably entered the hollow 12 at the start of discharge, resulting in stable discharge.
放射率を大きくする方法としては、鉄−ニッケル合金板
の同表面を酸化したり、クロムを加えて酸化させる方法
が簡便である。アルミナ、ジルコニア、チタニアｔ Ｓ
ｉＣなどのセラミックスやカーボンの粉末を塗布しても
良好な特性が得られる。A simple method for increasing the emissivity is to oxidize the same surface of the iron-nickel alloy plate or to oxidize it by adding chromium. Alumina, zirconia, titania tS
Even if ceramics such as iC or carbon powder is applied, good characteristics can be obtained.
第三の実施例は一本の金属線を密巻きにして円筒状のコ
イルに形成したもので円筒１１を代替えしたもので、こ
の電極は、製造が簡単であるという利点が生じる。In the third embodiment, a single metal wire is tightly wound to form a cylindrical coil, replacing the cylinder 11, and this electrode has the advantage of being easy to manufacture.
第四の実施例を第４図に示す。金属円筒が二重に設けら
れており、内側円筒１１の内外表面に電子放射物質２１
が塗布されている。当然のことながら、内側円筒１１と
外側円筒４ｏとの最大距離は０．５ｍ＋から２．ＯＩの
範囲に有るときが最も効果が大きい。この実施例の電極
は、電極面積が大きいので大電流が流せるという利点が
生じる。A fourth embodiment is shown in FIG. A double metal cylinder is provided, and an electron emitting material 21 is placed on the inner and outer surfaces of the inner cylinder 11.
is coated. Naturally, the maximum distance between the inner cylinder 11 and the outer cylinder 4o is between 0.5m+ and 2.5m+. The effect is greatest when it is within the OI range. The electrode of this embodiment has the advantage that a large current can flow because the electrode area is large.
本発明によれば、寿命が長く、かつ高効率である低圧放
電灯が得られる。また、単純な管端構造の低圧放電灯が
得られ、製造方法が簡単になるという利点が生じる。According to the present invention, a low pressure discharge lamp with a long life and high efficiency can be obtained. In addition, a low-pressure discharge lamp with a simple tube end structure can be obtained, which has the advantage of simplifying the manufacturing method.
第１図は本発明の一実施例の断面図、第２図から第４図
のそれぞれ（ａ）（ｂ）は本発明の実施例の電極の側断
面図および縦面図である。
１．２・・・電極、１０・・・金属棒、１１・・・金属
円筒。
１２・・・ホロー、１５・・・ゲッター、２０・・・黒
色物、第 １ 図
２θ 黒色物
２１ 電子放射物質
拓２ 図
（α）（ｂ）FIG. 1 is a sectional view of an embodiment of the present invention, and FIGS. 2 to 4 (a) and (b) are a side sectional view and a longitudinal sectional view of the electrode of the embodiment of the present invention, respectively. 1.2... Electrode, 10... Metal rod, 11... Metal cylinder. 12...Hollow, 15...Getter, 20...Black object, Fig. 1 2θ Black object 21 Electron emitting material 2 Fig. (α) (b)
Claims (1)
電極を有することを特徴とした低圧放電灯。 ２、前記金属円筒の内面と前記金属棒の外表面との最大
距離Ｌが、０．５ｍｍから２．０ｍｍの範囲にあること
を特徴とした特許請求の範囲第１項記載の低圧放電灯。 ３、前記金属棒の直径が０．６ｍｍ以上であることを特
徴とした特許請求の範囲第１項または第２項記載の低圧
放電灯。 ４、放電用ガスの主成分を希ガスとし、希ガスの原子量
をＭとするときＴｏｒｒで表した希ガスの圧力が２８０
／Ｍ以上で２０００／Ｍ以下であることを特徴とする特
許請求の範囲第１項から第３項までのいずれか１つの項
記載の低圧放電灯。 ５、少なくとも前記金属円筒の内面および前記金属棒の
外面の少なくとも一方にジルコニウムを含むゲツターを
設けたことを特徴とする特許請求の範囲第１項から第４
項までのいずれか１つの項記載の低圧放電灯。 ６、前記金属円筒の内面および前記金属棒の外面の少な
くとも一方に電子放射物質として Ｂａ＿２ＣａＷＯ＿６、Ｂａ＿３Ｙ＿２ＷＯ＿９、５Ｂ
ａＯ・２Ａｌ＿２Ｏ＿３、ＬａＢ＿６、ＭｇＯの中から
選ばれた少なくとも一種を塗布した事を特徴とする特許
請求の範囲第１項から第４項までのいずれか１つの項記
載の低圧放電灯。 ７、前記金属円筒の外表面の少なくとも一部を前記金属
円筒の内表面の放射率より大きい状態にしたことを特徴
とする特許請求の範囲第１項から第６項までのいずれか
１つの項記載の低圧放電灯。 ８、前記金属円筒の外表面の少なくとも一部に放射率が
０．５以上である物質を塗布したことを特徴とする特許
請求の範囲第１項から第７項までのいずれか１つの項記
載の低圧放電灯。 ９、前記金属円筒を密巻きにした金属線コイルで置き換
えた事を特徴とする特許請求の範囲第１項から第８項ま
でのいずれか１つの項記載の低圧放電灯。[Scope of Claims] 1. A low-pressure discharge lamp characterized by having at least an electrode in which a metal rod is inserted non-coaxially into a metal cylinder. 2. The low-pressure discharge lamp according to claim 1, wherein the maximum distance L between the inner surface of the metal cylinder and the outer surface of the metal rod is in the range of 0.5 mm to 2.0 mm. 3. The low-pressure discharge lamp according to claim 1 or 2, wherein the metal rod has a diameter of 0.6 mm or more. 4. When the main component of the discharge gas is a rare gas and the atomic weight of the rare gas is M, the pressure of the rare gas expressed in Torr is 280
The low-pressure discharge lamp according to any one of claims 1 to 3, characterized in that it is greater than or equal to /M and less than or equal to 2000/M. 5. Claims 1 to 4, characterized in that a getter containing zirconium is provided on at least one of the inner surface of the metal cylinder and the outer surface of the metal rod.
A low-pressure discharge lamp described in any one of the following paragraphs. 6. Ba_2CaWO_6, Ba_3Y_2WO_9, 5B as an electron emitting material on at least one of the inner surface of the metal cylinder and the outer surface of the metal rod.
The low-pressure discharge lamp according to any one of claims 1 to 4, characterized in that it is coated with at least one selected from aO.2Al_2O_3, LaB_6, and MgO. 7. Any one of claims 1 to 6, characterized in that at least a portion of the outer surface of the metal cylinder has a higher emissivity than the inner surface of the metal cylinder. Low pressure discharge lamp as described. 8. Any one of claims 1 to 7, characterized in that at least a portion of the outer surface of the metal cylinder is coated with a substance having an emissivity of 0.5 or more. low pressure discharge lamp. 9. The low-pressure discharge lamp according to any one of claims 1 to 8, characterized in that the metal cylinder is replaced with a tightly wound metal wire coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12432089A JPH02304855A (en) | 1989-05-19 | 1989-05-19 | Low pressure electric discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12432089A JPH02304855A (en) | 1989-05-19 | 1989-05-19 | Low pressure electric discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02304855A true JPH02304855A (en) | 1990-12-18 |
Family
ID=14882420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12432089A Pending JPH02304855A (en) | 1989-05-19 | 1989-05-19 | Low pressure electric discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02304855A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999009584A1 (en) * | 1997-08-21 | 1999-02-25 | Everbrite, Inc. | Cathode for a gas discharge lamp |
-
1989
- 1989-05-19 JP JP12432089A patent/JPH02304855A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999009584A1 (en) * | 1997-08-21 | 1999-02-25 | Everbrite, Inc. | Cathode for a gas discharge lamp |
| US5898272A (en) * | 1997-08-21 | 1999-04-27 | Everbrite, Inc. | Cathode for gas discharge lamp |
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