JPH027350A - Low pressure electric-discharge lamp - Google Patents
Low pressure electric-discharge lampInfo
- Publication number
- JPH027350A JPH027350A JP15676388A JP15676388A JPH027350A JP H027350 A JPH027350 A JP H027350A JP 15676388 A JP15676388 A JP 15676388A JP 15676388 A JP15676388 A JP 15676388A JP H027350 A JPH027350 A JP H027350A
- Authority
- JP
- Japan
- Prior art keywords
- low
- discharge
- discharge lamp
- pressure
- tube
- 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
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005286 illumination Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-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
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum 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
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- 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、熱陰極を有する蛍光灯のような低圧放電灯に
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a low-pressure discharge lamp, such as a fluorescent lamp, having a hot cathode.
熱陰極放電灯および冷陰極放電灯については、照明学会
間の照明ハンドブック（昭和５３年５月。Regarding hot cathode discharge lamps and cold cathode discharge lamps, please refer to the Illumination Institute of Japan's Inter-Illumination 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、熱陰極形の蛍光灯については。Ohmsha), pages 759 to 760. Also, regarding hot cathode type 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、照明学会間のライディングハンドブ
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 Illumination Society of Japan Riding Handbook (November 1988, Ohmsha).
放電電流が０．ＩＡ以下で、動作中の放電用ガスの圧力
が１００ Ｔｏｒｒ以下である。Discharge current is 0. IA or less, and the discharge gas pressure during operation is 100 Torr or less.
上記従来の熱陰極最低圧放電灯においては、電極を通電
によって加熱するために、１個の電極につき２本のリー
ド線が必要であり、放電管の管端の構造が複雑になると
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、上記の欠点は致命的であった。また、冷陰極形低
圧放電灯は、リード線は電極１個につき１本であるが、
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。The above-mentioned conventional hot cathode lowest pressure discharge lamp has the disadvantage that two lead wires are required for each electrode in order to heat the electrode by energizing it, which complicates the structure of the tube end of the discharge tube. there were. In particular, the above drawbacks were fatal when the dimensions of the discharge vessel were small. In addition, cold cathode low pressure discharge lamps have one lead wire for each electrode.
The drawback was that the cathode drop voltage was high and therefore the efficiency was low.
なお、高圧水銀灯などのように、放電電流が０．５Ａ以
上で、動作中における放電用ガスの圧力が千Ｔ ｏｒｒ
にもなるいわゆる高輝度放電灯においては、１個の熱陰
極に対して１個のリード線方式である。放電用ガスの圧
力が高く、かつ放電電流が大きいので、アークスポット
が安定に形成されるため、１個の熱陰極に対して１個の
リード線方式が可能になる。放電電流が０．１Ａ以下、
放電用ガスの圧力が１００ Ｔｏｒｒ以下であるような
低圧放電灯においては、アークスポットが安定に形成で
きないため、１個の熱陰極に対して１個のリード線方式
は実現されていない。In addition, when the discharge current is 0.5 A or more, such as in a high-pressure mercury lamp, the pressure of the discharge gas during operation is 1,000 Torr.
In a so-called high-intensity discharge lamp, which also serves as a hot cathode, one lead wire is used for one hot cathode. Since the pressure of the discharge gas is high and the discharge current is large, an arc spot is stably formed, making it possible to use one lead wire for one hot cathode. Discharge current is 0.1A or less,
In a low-pressure discharge lamp in which the pressure of the discharge gas is 100 Torr or less, an arc spot cannot be stably formed, so a method of providing one lead wire for one hot cathode has not been realized.
本発明の目的は、管端部の構造が単純で、かつ高効率で
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 and high efficiency.
上記目的は、熱陰極を使用し、かつ１個の熱陰極に対し
て１本のリード線を設ける方式によって達成される。上
記熱陰極は、熱電子放射物質（以後エミッターと記す）
を塗布した耐熱性の金属細線からなる多重コイルを、電
極芯枠で保持した構造である。上記金属細線の直径は、
寿命にわたってアークスポットを安定に形成するために
、５０μｍ以下が最適である。The above object is achieved by using hot cathodes and providing one lead wire for one hot cathode. The above hot cathode is a thermionic emitting material (hereinafter referred to as an emitter)
It has a structure in which multiple coils made of heat-resistant thin metal wires coated with aluminum are held in an electrode core frame. The diameter of the above metal wire is
In order to stably form an arc spot over a lifetime, the optimum thickness is 50 μm or less.
なお、ここで言う熱陰極とは、陰極降下電圧が６０Ｖ以
下である電極であり、具体的には、二つの電極を１５−
＠以下の間隔で設置し、放電を行ったときの放電電圧（
実効値）が６０Ｖ以下になる電極である。Note that the hot cathode referred to here is an electrode with a cathode drop voltage of 60 V or less, and specifically, the two electrodes are connected at a voltage of 15 -
The discharge voltage when discharging is performed by installing the
It is an electrode whose effective value) is 60V or less.
本発明の低圧放電灯においては、１個の熱陰極に対して
１本のリード線が接続されるので、放電管の管端部が単
純になる。また、熱陰極なので、電極損失が小さく、高
効率が得られる。In the low-pressure discharge lamp of the present invention, one lead wire is connected to one hot cathode, so the tube end of the discharge tube is simple. Furthermore, since it is a hot cathode, electrode loss is small and high efficiency can be obtained.
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１の両端に、熱陰極１０．１０’が封入されており
、熱陰極１０．１０’はそれぞれ１本のリード線１１．
１１’に接続されている。FIG. 1 shows a first embodiment of the present invention, in which hot cathodes 10 and 10' are sealed at both ends of a straight tube-shaped discharge vessel 1, and each hot cathode 10 and 10' has one lead. Line 11.
11'.
リード線が１本なので、放電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。Since there is only one lead wire, the structure of the tube end of the discharge tube is simple, and there is an advantage that manufacturing is simple.
管端の構造が単純であるどう利点は、放電管の内径が８
ＩｎＩ１１以下の場合に、その効果が大になる。すなわ
ち、従来の低圧放電灯のように２本のリード線を用いた
熱陰極では、放電管内において２本のリード線によって
電極が支持されているわけであるから、電極と管壁との
距離が極端に小さくなる場合が生じ、その結果、管壁の
黒化が発生しやすくなる。さらに、放電管の内径が６ｍ
ｍ以下になると、２本のリード線が電気的に接触しやす
くなり、放電灯の製造はいよいよ困難になり、かつ放電
灯への電気的接続もかなり困難になる。以上のように、
リード線１本の方式は、放′Ｗ１管の管径が小さい場合
に特に利点が多くなる。The advantage of the simple structure of the tube end is that the inner diameter of the discharge tube is 8.
The effect becomes great when InI is 11 or less. In other words, in a hot cathode that uses two lead wires like a conventional low-pressure discharge lamp, the electrode is supported by the two lead wires inside the discharge tube, so the distance between the electrode and the tube wall is In some cases, the tube wall becomes extremely small, and as a result, blackening of the tube wall is likely to occur. Furthermore, the inner diameter of the discharge tube is 6 m.
If it is less than m, the two lead wires will easily come into electrical contact, making it even more difficult to manufacture a discharge lamp, and also making electrical connection to the discharge lamp considerably difficult. As mentioned above,
The single lead wire system has many advantages especially when the diameter of the W1 tube is small.
第１図の実施例に使用した電極を、第２図に示す。電極
芯枠１２によってエミッターを塗布した二重コイル１３
が支持されている。二重コイルの全屈素線の直径が５μ
ｍ以下なので、二重コイル部の熱容量が小さく、アーク
スポットは、電極芯枠１２ではなく、二重コイル１３上
に発生する。The electrodes used in the embodiment of FIG. 1 are shown in FIG. Double coil 13 coated with emitter by electrode core frame 12
is supported. The diameter of the fully bent wire of the double coil is 5μ
m or less, the heat capacity of the double coil portion is small, and the arc spot is generated not on the electrode core frame 12 but on the double coil 13.
電極芯枠にアークスポットが生じないので、電極芯枠の
材質としては、高輝度放電灯に使用されているようなタ
ングステン、タンタル、モリブデンのような高融点金属
を使用する必要がなく、融点が１４００℃以上であれば
充分である。電極芯枠の材質として、鉄、ニッケルおよ
び鉄、ニッケルを含んだ合金が、加工性の面から最適で
ある。Since arc spots do not occur on the electrode core frame, there is no need to use high-melting point metals such as tungsten, tantalum, and molybdenum, which are used in high-intensity discharge lamps, as the material for the electrode core frame. A temperature of 1400°C or higher is sufficient. As materials for the electrode core frame, iron, nickel, and alloys containing iron and nickel are optimal from the viewpoint of workability.
エミッターとしては、通常の放電灯に使用するものでよ
いが、Ｂａ、ＣａＷＯ，、ＬａＢ、。The emitter may be one used in ordinary discharge lamps, such as Ba, CaWO, LaB, etc.
５ＢａＯ”ＡＱ２０．．５ＢａＯ’２ＡＱ２０３”３Ｃ
ａＯ。5BaO"AQ20..5BaO'2AQ203"3C
aO.
Ｂａ５ｒＣａＷＯ，を使用すると、電極に塗布してから
の脱ガスが容易であるという利点が生じる。The advantage of using Ba5rCaWO is that it can be easily degassed after being applied to the electrode.
第１図に示したように、電極１０．１０’ を放電管１
の管軸と同軸に設けると、電極１０゜１０’ と放電管
１の管壁との距離が大きくなり、管端の黒化が発生しに
くいという利点が生じる。As shown in FIG.
If the electrode 10° 10' is provided coaxially with the tube axis of the discharge tube 1, the distance between the electrode 10.degree.
電極１０．１０’ と放電管１とを同軸に設けることが
、放電管１の内径が８ｍｍ以下のものにおいて特に有利
になることは、前述の放電管１の内径限定の理由からも
自明である。It is obvious that providing the electrode 10.10' and the discharge tube 1 coaxially is particularly advantageous when the inner diameter of the discharge tube 1 is 8 mm or less, also due to the above-mentioned reason for limiting the inner diameter of the discharge tube 1. .
リード線１１．１１’ は放電管１の管軸と同軸に設け
られている。従来は放電管の管端に口金を設けたり、放
電管の管壁の一部を固定する方法などによって放電管を
光学的に一定な場所に設置していたが１本実施例のよう
に、リード線１１゜１１′と放電管１の管軸とが同軸の
場合には、リード線１１および１１′だけによって光学
的な位置ぎめが出き、すなわち、リード線だけでランプ
を固定できるという利点が生じる。The lead wires 11,11' are provided coaxially with the tube axis of the discharge tube 1. Conventionally, the discharge tube was installed in an optically constant location by providing a cap at the end of the discharge tube or fixing a part of the tube wall of the discharge tube, but as in this embodiment, When the lead wires 11° and 11' are coaxial with the tube axis of the discharge tube 1, the advantage is that optical positioning can be achieved using only the lead wires 11 and 11', that is, the lamp can be fixed using only the lead wires. occurs.
放電管１の内面の少なくとも一部に、蛍光体２が塗布さ
れている。蛍光体塗布膜２が存在する場合には、電極１
０．１０’ を挿入する際に電極１０．１０’が蛍光体
膜２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 2 is coated on at least a portion of the inner surface of the discharge tube 1. When the phosphor coating film 2 is present, the electrode 1
When inserting the 0.10' electrode, the electrode 10.10' will come into contact with the phosphor film 2, causing the phosphor to fall off and the blackening of the tube end to become more noticeable, so do not connect one lead wire to each electrode. The provided scheme is particularly advantageous.
第１図において、放電管１を内径５．７ｍｍ、長さ２７
０ｍｍのソーダガラス管とし、内面に蛍光体２として希
土類蛍光体Ｙ、Ｏ，： Ｅ ｕ、ＭｇＡ Ｑ １１０１
ｇ ： Ｃｅ ｐ Ｔ ｂ 、 ３ Ｓｒｓ （ｐ Ｏ
Ｊｇ”ＣａＣＯ２の混合物を塗布した。電極１０．１０
’は、電極芯枠１２とリード線１１とを同一の１本の線
とし、その材質はＮ：４２％、Ｃｒ：６％。In Figure 1, the discharge tube 1 has an inner diameter of 5.7 mm and a length of 27 mm.
A 0 mm soda glass tube with rare earth phosphors Y, O,: E u, MgA Q 1101 as the phosphor 2 on the inner surface.
g: Ce p T b , 3 Srs (p O
A mixture of Jg”CaCO2 was applied. Electrode 10.10
In ', the electrode core frame 12 and the lead wire 11 are the same wire, and the material thereof is N: 42%, Cr: 6%.
Ｆｅ ： ５２％である合金、直径は０．５Ｉｌｌｌと
し、その先端に直径２２μｍのタングステン線からなる
二重コイル１３を設けた。二重コイルの一部コイルの内
径はＱ、１３＋ｎｍ、ピッチ０．０６５ｍｍである。こ
の電極にエミッターとして、まず（Ｂａ。The alloy was made of Fe: 52% and had a diameter of 0.5 Illl, and a double coil 13 made of a tungsten wire with a diameter of 22 μm was provided at the tip thereof. The inner diameter of the partial coil of the double coil is Q, 13+nm, and the pitch is 0.065 mm. First, add (Ba) to this electrode as an emitter.
Ｓ ｒ、Ｃａ）Ｃｏ、を塗布し、これを真空中で１１０
０℃で加熱することによって（Ｂａ、Ｓｒ。Coat S r, Ca) Co, and heat it at 110% in vacuum.
By heating at 0°C (Ba, Sr.
Ｃａ）Ｏを設け、これを空気中に５分間以上晒すことな
く放電管１の両端に封止込んだ。放電用ガスは、２０Ｔ
ｏｒｒのアルゴンと水銀蒸気である。Ca)O was provided and sealed at both ends of the discharge tube 1 without being exposed to air for more than 5 minutes. The discharge gas is 20T.
orr argon and mercury vapor.
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、電極１０゜１０′は陰極降下
電圧は１１ｖの熱陰極として安定に動作し、輝度は１２
０００ｎｔが得られ、冷陰極、光灯の約１．７倍の効率
が得られた。また、リード線１１．１１’だけによって
放電灯を固定するだけで、光学的に最適な位置を保つ事
ができた。このように、単純な支持枯造で光学的位置を
確保できるので、薄形化が強く要求される液晶用のバラ
クラに最適である。When the above-mentioned low-pressure discharge lamp of the present invention was lit with a discharge current of 30 kHz and 20 mA, the electrode 10°10' operated stably as a hot cathode with a cathode drop voltage of 11 V, and the brightness was 12 V.
000 nt, and the efficiency was approximately 1.7 times that of a cold cathode or light lamp. Further, by simply fixing the discharge lamp using only the lead wires 11 and 11', it was possible to maintain the optimal optical position. In this way, the optical position can be ensured with a simple support frame, making it ideal for liquid crystal baraculas that are strongly required to be thin.
本実施例においては、３０ｋＨｚの高周波で点灯した。In this example, the lighting was performed at a high frequency of 30 kHz.
通常の熱陰極形の低圧放電灯においては４本の電線を必
要とするが、本発明の低圧放電灯においては２本のｆｒ
１線でよい、したがって、高周波雑音の放射が少ないと
いう利点が生じる。A normal hot cathode type low pressure discharge lamp requires four electric wires, but the low pressure discharge lamp of the present invention requires two fr
Only one wire is required, so there is an advantage that there is less radiation of high frequency noise.
第４図は、本発明の別の実施例の電極で、第３図に示す
ように電極芯枠１２に二重コイル１４を巻いたものをＡ
点で折りまげたものである。FIG. 4 shows an electrode according to another embodiment of the present invention, in which a double coil 14 is wound around an electrode core frame 12 as shown in FIG.
It is folded at a point.
第６図は、本発明の別の実施例の電極で、第５図に示す
ように電極芯枠１２に三重コイル１５を巻いたものをＡ
点で折り曲げたものである。FIG. 6 shows an electrode according to another embodiment of the present invention, in which a triple coil 15 is wound around an electrode core frame 12 as shown in FIG.
It is bent at a point.
第４図および第６図の実施例においては、アークスポッ
トは、電極芯枠１２上には発生せず、熱容量の小さい二
重コイル１４あるいは三重コイル１５上に発生する。な
お、エミッターの塗布を第４図あるいは第６図のような
電極完成後に行うことにし、エミッターが電極芯枠には
塗布されないようにコイル１４または１５の約半周部分
にだけ塗布すれば、アークスポットはより確実に多重コ
イル上に形成される。In the embodiments shown in FIGS. 4 and 6, arc spots are not generated on the electrode core frame 12, but on the double coil 14 or triple coil 15, which have a small heat capacity. In addition, if you decide to apply the emitter after completing the electrode as shown in Figure 4 or Figure 6, and apply the emitter only to about half the circumference of the coil 14 or 15 so as not to apply it to the electrode core frame, the arc spot will be reduced. is more reliably formed on multiple coils.
電極芯枠１２の材質を、Ｔｉ、Ｚｒを含んだ合金とする
と、電極芯枠１２はゲッター作用を有することになり、
エミッター等から発生した不純ガスを効果的に吸収する
ので、光束劣化が小さくなるという利点も生じる。If the material of the electrode core frame 12 is an alloy containing Ti and Zr, the electrode core frame 12 will have a getter effect,
Since the impurity gas generated from the emitter etc. is effectively absorbed, there is also the advantage that luminous flux deterioration is reduced.
本発明によれば、単）ｎな管端４１造の低圧放電灯が得
られ、製造方法が簡単になり、放電灯の取りつけも容易
になり、かつ高効率であるどう利点が生じる。According to the present invention, it is possible to obtain a low-pressure discharge lamp having only 41 tube ends, which has the advantages of a simple manufacturing method, easy installation of the discharge lamp, and high efficiency.
第１図は本発明の一実施例の断面図、第２．４゜６図は
本発明の実施例の＠極の断面図、第３，５図は第４，６
図の電極の製作を説明するための断面図である。
１・・・放電管、１０．１０’・・・電極、１１．１１
’・・・リード線、１２．１２・・・電極芯枠。
／、？：二ｔフ３ルFig. 1 is a cross-sectional view of an embodiment of the present invention, Fig. 2.4゜6 is a cross-sectional view of the @ pole of an embodiment of the present invention, Figs.
FIG. 3 is a cross-sectional view for explaining the production of the electrode shown in the figure. 1...Discharge tube, 10.10'...Electrode, 11.11
'... Lead wire, 12.12... Electrode core frame. /,? :2t full 3rd full
Claims (1)
中における放電用ガスの圧力が１００Ｔｏｒｒ以下で、
放電電流が０．１Ａ以下である低圧放電灯において、１
個の熱陰極に対して１本のリード線を有することを特徴
とする低圧放電灯。 ２、上記熱陰極の構造が金属細線からなる多重コイルに
熱電子放射物質を塗布したものを熱極芯棒で保持した構
造であることを特徴とする特許請求の範囲第１項記載の
低圧放電灯。 ３、上記金属細線の直径が５０μｍ以下であることを特
徴とする特許請求の範囲第２項記載の低圧放電灯。 ４、上記放電容器が直管状であり、上記リード線が上記
放電容器の管軸と同軸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つの項に記載
の低圧放電灯。 ５、上記熱陰極が上記放電容器の管軸と実質的に同軸で
あることを特徴とする特許請求の範囲第２項から第４項
までのいずれか１つの項に記載の低圧放電灯。 ６、上記放電容器の内壁の少なくとも一部に蛍光体を設
けたことを特徴とする特許請求の範囲第１項から第５項
までのいずれか１つの項に記載の低圧放電灯。 ７、上記放電容器の内径が８ｍｍ以下である事を特徴と
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
つの項に記載の低圧放電灯。 ８、上記熱陰極の電極芯棒の材質が、鉄、ニッケルおよ
び鉄、ニッケルを含んだ合金である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
に記載の低圧放電灯。[Claims] 1. At least one pair of hot cathodes is provided in the discharge vessel, and the pressure of the discharge gas during operation is 100 Torr or less,
In a low pressure discharge lamp with a discharge current of 0.1A or less, 1
A low-pressure discharge lamp characterized by having one lead wire for each hot cathode. 2. The low-pressure radiation source according to claim 1, wherein the hot cathode has a structure in which multiple coils made of thin metal wires are coated with a thermionic emitting material and held by a hot electrode core rod. electric light. 3. The low-pressure discharge lamp according to claim 2, wherein the diameter of the thin metal wire is 50 μm or less. 4. The discharge vessel has a straight tube shape, and the lead wire is coaxial with the tube axis of the discharge vessel, as described in any one of claims 1 to 3. low pressure discharge lamp. 5. The low-pressure discharge lamp according to any one of claims 2 to 4, wherein the hot cathode is substantially coaxial with the tube axis of the discharge vessel. 6. The low-pressure discharge lamp according to any one of claims 1 to 5, characterized in that a phosphor is provided on at least a portion of the inner wall of the discharge vessel. 7. Any one of claims 1 to 6, characterized in that the discharge vessel has an inner diameter of 8 mm or less.
Low-pressure discharge lamps as described in paragraph 1. 8. According to any one of claims 1 to 7, wherein the material of the electrode core of the hot cathode is iron, nickel, and an alloy containing iron and nickel. Low pressure discharge lamp as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15676388A JPH027350A (en) | 1988-06-27 | 1988-06-27 | Low pressure electric-discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15676388A JPH027350A (en) | 1988-06-27 | 1988-06-27 | Low pressure electric-discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH027350A true JPH027350A (en) | 1990-01-11 |
Family
ID=15634783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15676388A Pending JPH027350A (en) | 1988-06-27 | 1988-06-27 | Low pressure electric-discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH027350A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60264039A (en) * | 1984-06-11 | 1985-12-27 | Nec Home Electronics Ltd | Cold cathode electric-discharge lamp |
| JPS62249737A (en) * | 1986-04-23 | 1987-10-30 | 大倉工業株式会社 | Double layer tube for car |
-
1988
- 1988-06-27 JP JP15676388A patent/JPH027350A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60264039A (en) * | 1984-06-11 | 1985-12-27 | Nec Home Electronics Ltd | Cold cathode electric-discharge lamp |
| JPS62249737A (en) * | 1986-04-23 | 1987-10-30 | 大倉工業株式会社 | Double layer tube for car |
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