JP3424459B2 - Electrodeless lamp - Google Patents
Electrodeless lampInfo
- Publication number
- JP3424459B2 JP3424459B2 JP27118696A JP27118696A JP3424459B2 JP 3424459 B2 JP3424459 B2 JP 3424459B2 JP 27118696 A JP27118696 A JP 27118696A JP 27118696 A JP27118696 A JP 27118696A JP 3424459 B2 JP3424459 B2 JP 3424459B2
- Authority
- JP
- Japan
- Prior art keywords
- arc tube
- discharge lamp
- starting
- electrodeless discharge
- auxiliary electrode
- 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.)
- Expired - Fee Related
Links
- 239000000919 ceramic Substances 0.000 claims description 23
- 239000000126 substance Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 239000012857 radioactive material Substances 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 230000006698 induction Effects 0.000 description 6
- 238000010304 firing Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 239000011195 cermet Substances 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 229910001507 metal halide Inorganic materials 0.000 description 2
- 150000005309 metal halides Chemical class 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000941 radioactive substance Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、発光管内に封入さ
れた放電ガスに対して外部から高周波電磁界を作用させ
ることによって、放電ガスを励起発光させるようにした
無電極放電灯に関し、特にその発光管に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrodeless discharge lamp in which a discharge gas enclosed in an arc tube is excited by a high-frequency electromagnetic field from the outside to cause the discharge gas to emit light. It relates to an arc tube.
【０００２】[0002]
【従来の技術】近年、高輝度放電灯のランプ寿命の向上
を図るために、あるいは発光物質の選択の幅を広げ、演
色性や発光効率の向上を図るために、発光管内に電極を
設けずに、代わりに発光管の周囲に巻回したコイルによ
る誘導結合によって発光管内の放電ガスを励起、発光さ
せるタイプの無電極放電灯が提案されている。2. Description of the Related Art In recent years, in order to improve the lamp life of high-intensity discharge lamps, or to broaden the selection range of light-emitting substances and improve color rendering and light emission efficiency, electrodes are not provided in the arc tube. Instead, there has been proposed an electrodeless discharge lamp of a type that excites and discharges the discharge gas in the arc tube by inductive coupling by a coil wound around the arc tube.
【０００３】この種の無電極放電灯は、発光管の材料と
して石英ガラスを用いているが、点灯中に発光管が高温
になるために、時間の経過とともに、封入されている発
光物質と発光管が反応して発光管が変色したり、発光管
材料の結晶化による失透現象等が生じ、発光管の光透過
率を低下させたり発光管の強度を低下させ、ランプ寿命
を短くするという欠点があった。In this type of electrodeless discharge lamp, quartz glass is used as the material of the arc tube. However, the temperature of the arc tube becomes high during lighting, so that the light emitting material and the light emission that are encapsulated over time. It is said that the tube reacts to change the color of the arc tube and devitrification phenomenon occurs due to crystallization of the material of the arc tube, which lowers the light transmittance of the arc tube and the strength of the arc tube and shortens the lamp life. There was a flaw.
【０００４】また、発光材料に金属ハロゲン化物を用い
た場合は、金属ハロゲン化物の金属イオンが発光管内に
溶け込んで発光空間から消失し、時間の経過とともに、
発光管内にハロゲンが取り残されるようになる。このこ
とが始動電圧や放電維持電圧の上昇につながり、やはり
ランプ寿命を短くするという欠点があった。When a metal halide is used as the light emitting material, the metal ions of the metal halide dissolve into the arc tube and disappear from the light emitting space.
The halogen is left behind in the arc tube. This leads to an increase in the starting voltage and the discharge sustaining voltage, which also has the drawback of shortening the lamp life.
【０００５】その上、石英ガラスの軟化点が約１５００
℃と低いために、入力電力量をある程度以下に抑えなけ
ればならず、さらに高出力、高効率のランプとして用い
ることができない欠点があった。In addition, the softening point of quartz glass is about 1500.
Since the temperature is as low as ℃, the amount of input electric power must be suppressed to a certain level or less, and there is a drawback that the lamp cannot be used as a lamp with high output and high efficiency.
【０００６】これらの欠点を解消するため、発光管材料
に石英ガラスよりも耐熱性、耐薬品性に優れたアルミナ
等の透光性セラミックスを用いた無電極放電灯が提案さ
れている（特開平７−２７２６８９号公報等参照）。In order to solve these drawbacks, an electrodeless discharge lamp has been proposed which uses a translucent ceramic material such as alumina, which is superior in heat resistance and chemical resistance to quartz glass, to the arc tube material (Japanese Patent Laid-Open No. Hei 10-1999) 7-272689, etc.).
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、発光管
材料に透光性セラミックスを用いた無電極放電灯におい
ても、発光管内部に電極を持たないため、電極を通して
直接発光管内に電気エネルギーを供給することができな
い。そこで、始動の際には、発光管の外面に当接した始
動補助電極に高電圧パルスを与える等して、発光管内に
絶縁破壊を起こす必要がある。この方式による始動のメ
カニズムは次のようなものである。However, even in the electrodeless discharge lamp using the translucent ceramic as the material of the arc tube, since no electrode is provided inside the arc tube, electric energy is directly supplied to the arc tube through the electrode. I can't. Therefore, at the time of starting, it is necessary to cause a dielectric breakdown in the arc tube by, for example, applying a high-voltage pulse to the starting auxiliary electrode that is in contact with the outer surface of the arc tube. The starting mechanism of this method is as follows.
【０００８】まず、始動補助電極からの高電圧パルスに
よって封入ガスの一部が電離する。その結果発生した電
子は、誘導コイルによって発光管内に生じている電磁界
により加速され、さらに周囲のガスを電離する。この過
程が繰り返されることによって絶縁破壊に至り、放電が
開始するというものである。First, a part of the enclosed gas is ionized by the high voltage pulse from the starting auxiliary electrode. The resulting electrons are accelerated by the electromagnetic field generated in the arc tube by the induction coil, and further ionize the surrounding gas. By repeating this process, dielectric breakdown occurs and discharge starts.
【０００９】しかしながら、この方式では、発光管内に
供給される電気的エネルギーが、発光管内部に電極構造
を有する放電灯に比べて小さいため、発光管の劣化に伴
い、始動の際に絶縁破壊を起こすことができずに不点灯
に陥ることがあった。また、始動補助電極にかなりの高
電圧を与えなければならず、高電圧発生回路（始動回
路）に多大の負担をかけるという難点があった。However, in this method, the electric energy supplied to the inside of the arc tube is smaller than that of a discharge lamp having an electrode structure inside the arc tube, and therefore the dielectric breakdown at the time of start-up is accompanied by the deterioration of the arc tube. It could not be woken up and fell into non-lighting. Further, there has been a problem that a considerably high voltage has to be applied to the starting auxiliary electrode, which imposes a great burden on the high voltage generating circuit (starting circuit).
【００１０】本発明は、上記問題点を解決するためにな
されたもので、透光性セラミックスで形成された発光管
を備えた無電極放電灯において、その始動性の向上を図
ることを目的とする。The present invention has been made to solve the above problems, and an object of the present invention is to improve the startability of an electrodeless discharge lamp having an arc tube made of translucent ceramics. To do.
【００１１】[0011]
【課題を解決するための手段】上記課題を解決するため
本発明は、発光管を放射性材料を混合した透光性セラミ
ックスで、あるいは低仕事関数の物質を混合した透光性
セラミックスで形成したことを特徴とするものである。
また、発光管を透光性セラミックス、放射性材料を混合
した透光性セラミックスまたは低仕事関数の物質を混合
した透光性セラミックスで形成し、その一部分を導電性
とするとともに、その導電性部分に始動補助電極を当接
してもよい。In order to solve the above-mentioned problems, according to the present invention, the arc tube is formed of a translucent ceramics mixed with a radioactive material or a translucent ceramics mixed with a substance having a low work function. It is characterized by.
Further, the arc tube is formed of translucent ceramics, translucent ceramics in which a radioactive material is mixed, or translucent ceramics in which a substance having a low work function is mixed, and a part of the arc tube is made conductive and The starting auxiliary electrode may abut.
【００１２】[0012]
【発明の実施の形態】図１は本発明の一実施形態を示す
もので、図において、１は透光性セラミックスで形成さ
れた発光管で、発光管１は円筒状の筒体１ａと円板状の
キャップ１ｂとからなり、筒体１ａとキャップ１ｂとは
セラミックセメント等を用いて封着されている。ここ
で、発光管１は、放射性材料のＰｒＯ2 粉末を５ｗｔ％
混合したアルミナ（Ａｌ2 Ｏ3 ）を焼成して作製されて
おり、その大きさは、直径が１０ｍｍ、高さが３０ｍｍ
で、その厚みは１ｍｍ乃至１．５ｍｍである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention. In FIG. 1, reference numeral 1 is an arc tube formed of translucent ceramics, and the arc tube 1 is a cylindrical tube 1a and a circle. It is composed of a plate-shaped cap 1b, and the cylindrical body 1a and the cap 1b are sealed by using ceramic cement or the like. Here, the arc tube 1 contains 5 wt% of PrO 2 powder which is a radioactive material.
It is made by firing mixed alumina (Al 2 O 3 ) and its size is 10 mm in diameter and 30 mm in height.
The thickness is 1 mm to 1.5 mm.
【００１３】３は始動補助電極で、その一端は発光管１
の底面に当接され、他端は高電圧パルス電源４に接続さ
れている。５は発光管１の外周面に巻回された誘導コイ
ルであって、その巻数はこの実施形態では５．５回であ
る。６は誘導コイル５に高周波電流を供給する高周波電
源である。Reference numeral 3 is a starting auxiliary electrode, one end of which is the arc tube 1.
Is abutted on the bottom surface of, and the other end is connected to the high-voltage pulse power source 4. Reference numeral 5 is an induction coil wound around the outer peripheral surface of the arc tube 1, and the number of turns is 5.5 in this embodiment. Reference numeral 6 is a high frequency power supply for supplying a high frequency current to the induction coil 5.
【００１４】なお、アルミナセラミックスに混合する放
射性材料としては、上記ＰｒＯ2 以外にもＰｒ，Ｔｈ等
でもよく、本発明は上記実施の形態に限定されるもので
はない。また、発光管１内には、発光材料としてＤｙＩ
3 ：３ｍｇ，ＮｄＩ3 ：５ｍｇ，ＣｓＩ：２０ｍｇが封
入され、バッファーガスとしてＸｅが１００Torr封入さ
れている。The radioactive material to be mixed with the alumina ceramics may be Pr, Th, etc. in addition to the above PrO 2 , and the present invention is not limited to the above embodiment. Further, in the arc tube 1, DyI is used as a light emitting material.
3 : 3 mg, NdI 3 : 5 mg, CsI: 20 mg are enclosed, and Xe is enclosed as 100 Torr as a buffer gas.
【００１５】このように構成された無電極放電灯におい
て、始動特性を計測するために、次のような実験を行っ
た。まず、高電圧パルス電源４により始動補助電極３に
最大波高約２０ｋＶ、パルス半値幅約１００ｎｓ、繰り
返し周期約０．５ｓの高電圧パルスを印加しておく。そ
の状態で高周波電源６により１３．５６ＭＨｚの高周波
を発生させた。そして、誘導コイル５の両端の電位差を
周知の手段でモニターしながら、高周波の出力を徐々に
高めて行き、発光管１内に紐状放電が発生した時の電位
差ＶS を計測した。なお、以下の説明において始動電圧
という場合は、この電圧ＶS を指すものとする。In the electrodeless discharge lamp thus constructed, the following experiment was conducted in order to measure the starting characteristics. First, a high voltage pulse having a maximum wave height of about 20 kV, a pulse half width of about 100 ns and a repetition period of about 0.5 s is applied to the starting auxiliary electrode 3 from the high voltage pulse power supply 4. In this state, the high frequency power supply 6 generated a high frequency of 13.56 MHz. Then, while monitoring the potential difference between both ends of the induction coil 5 by a well-known means, the high frequency output was gradually increased and the potential difference V S when the string-shaped discharge occurred in the arc tube 1 was measured. In the case that the starting voltage in the following description, is intended to refer to the voltage V S.
【００１６】この実験を放射性材料を含むアルミナセラ
ミックス製の上記発光管１からなる無電極放電灯２０本
に対して行ったところ、始動電圧ＶS の平均は１．３０
ｋＶであった。比較のために、放射性材料を含まない従
来のアルミナセラミックス製の発光管で構成された、上
記図１に示す実施形態と同一寸法、同一封入物の無電極
放電灯２０本に対して、上記と同じ実験を行った結果、
始動電圧ＶS の平均は１．３６ｋＶであった。従って、
本発明の上記実施形態に係る無電極放電灯においては、
始動電圧を約０．０６ｋＶ低下させることができた。When this experiment was conducted on 20 electrodeless discharge lamps made of the above-mentioned arc tube 1 made of alumina ceramics containing a radioactive material, the average starting voltage V S was 1.30.
It was kV. For comparison, 20 electrodeless discharge lamps having the same size and the same enclosure as those of the embodiment shown in FIG. As a result of the same experiment,
The average starting voltage V S was 1.36 kV. Therefore,
In the electrodeless discharge lamp according to the above embodiment of the present invention,
The starting voltage could be reduced by about 0.06 kV.
【００１７】次に、図２は本発明の第２の実施形態を示
すもので、低仕事関数の物質を混合した透光性セラミッ
クスを発光管材料に用いたものである。発光管１の形状
は上記実施形態のものと同一であり、封入物も同一であ
る。なお、図２においては、発光管１と始動補助電極３
のみを示し、高電圧パルス電源、誘導コイル、高周波電
源は省略している。Next, FIG. 2 shows a second embodiment of the present invention, in which a light-transmissive ceramic mixed with a substance having a low work function is used as an arc tube material. The shape of the arc tube 1 is the same as that of the above-described embodiment, and the enclosure is also the same. In FIG. 2, the arc tube 1 and the starting auxiliary electrode 3 are shown.
Only the high voltage pulse power supply, the induction coil, and the high frequency power supply are omitted.
【００１８】この実施形態においては、始動補助電極３
が当接している側の発光管キャップ１ｂは、有電極放電
ランプにおけるエミッタ材料、つまり、低仕事関数の物
質であるＢａ2 ＣａＷＯ6 を５ｗｔ％混合したアルミナ
（Ａｌ2 Ｏ3 ）を焼成して作製されている。なお、低仕
事関数の物質としては、上記以外にもＺｒＯ2 等でもよ
い。In this embodiment, the starting auxiliary electrode 3
The arc tube cap 1b on the side in contact with is made by firing an emitter material in an electrode discharge lamp, that is, alumina (Al 2 O 3 ) mixed with 5 wt% of Ba 2 CaWO 6 , which is a low work function substance. Has been made. In addition to the above, ZrO 2 or the like may be used as the low work function substance.
【００１９】この無電極放電灯と同一仕様の放電灯を２
０本作製し、その始動特性を上記と同一の方法により計
測した。その結果、始動電圧ＶS の平均は１．３３ｋＶ
となった。従って、低仕事関数の物質を含まない従来の
ものと比べて、始動電圧を約０．０３ｋＶ低下させるこ
とができた。Two discharge lamps having the same specifications as this electrodeless discharge lamp are used.
Zero pieces were produced and the starting characteristics were measured by the same method as described above. As a result, the average starting voltage V S is 1.33 kV.
Became. Therefore, it was possible to reduce the starting voltage by about 0.03 kV as compared with the conventional one which does not contain a substance having a low work function.
【００２０】図３は本発明の第３の実施形態を示すもの
で、発光管の一部分に導電性セラミックスを用いた無電
極放電灯の概略図である。発光管１の形状および封入物
は、上記実施形態と同一である。上記実施形態２と異な
る点は、始動補助電極３が当接している側の発光管キャ
ップ１ｂを、導電性セラミックスであるサーメットを焼
成して作製したことである。FIG. 3 shows a third embodiment of the present invention and is a schematic view of an electrodeless discharge lamp using a conductive ceramic in a part of an arc tube. The shape and enclosure of the arc tube 1 are the same as in the above embodiment. The difference from the second embodiment is that the arc tube cap 1b on the side where the auxiliary starting electrode 3 is in contact is manufactured by firing a cermet which is a conductive ceramic.
【００２１】上記と同様、この実施形態に係る放電灯を
２０本作製し、その始動特性を計測した。その結果、始
動電圧ＶS の平均は１．２８ｋＶとなった。従って、導
電性セラミックスを用いていない従来のものと比べて、
始動電圧を約０．０８ｋＶ低下させることができた。Similar to the above, 20 discharge lamps according to this embodiment were manufactured, and their starting characteristics were measured. As a result, the average starting voltage V S was 1.28 kV. Therefore, compared with the conventional one that does not use conductive ceramics,
The starting voltage could be reduced by about 0.08 kV.
【００２２】図４は本発明の第４の実施形態を示すもの
であり、発光管１の形状および封入物は、上記実施形態
と同一である。上記実施形態と異なる点は、発光管１を
構成する筒体１ａと始動補助電極３が当接していない側
のキャップ１ｂとを、実施形態１と同様に放射性材料の
ＰｒＯ2 粉末を５ｗｔ％混合したアルミナ（Ａｌ
2 Ｏ 3 ）を焼成して作製するとともに、始動補助電極３
が当接している側のキャップ１ｂを、導電性セラミック
スであるサーメットに低仕事関数の物質であるＢａ2Ｃ
ａＷＯ6 を５ｗｔ％混合したものを焼成して作製したこ
とである。FIG. 4 shows a fourth embodiment of the present invention.
The shape and enclosure of the arc tube 1 are the same as in the above embodiment.
Is the same as The difference from the above embodiment is that the arc tube 1 is
The side where the cylindrical body 1a and the auxiliary starting electrode 3 that are not in contact with each other
The cap 1b of FIG.
PrO2Alumina mixed with 5 wt% of powder (Al
2O 3) Is produced by firing the auxiliary auxiliary electrode 3
The cap 1b on the side where the
Ba which is a substance with a low work function in cermet which is2C
aWO6Was prepared by firing a mixture of 5 wt%
And.
【００２３】上記と同様、この実施形態に係る放電灯を
２０本作製し、その始動特性を計測した。その結果、始
動電圧ＶS の平均は１．２５ｋＶとなった。従って、従
来のアルミナセラミックスを用いて作製したものと比べ
て、始動電圧を約０．１１ｋＶ低下させることができ
た。Similar to the above, 20 discharge lamps according to this embodiment were produced and their starting characteristics were measured. As a result, the average starting voltage V S was 1.25 kV. Therefore, the starting voltage could be reduced by about 0.11 kV as compared with the one manufactured using the conventional alumina ceramics.
【００２４】[0024]
【発明の効果】請求項１記載の発明によれば、放射性材
料を混合した透光性セラミックスで発光管を形成したの
で、放射性物質から放射される放射線によっても発光管
内に封入した放電ガスの電離が起こる。従って、放射性
物質を含まない従来のセラミックス発光管を用いた場合
に比べて封入ガスの電離が促進されるから、放電灯はよ
り低い始動電圧で放電するようになり、始動性を向上さ
せることができる。According to the first aspect of the invention, since the arc tube is formed of the translucent ceramics mixed with the radioactive material, the discharge gas ionized in the arc tube is ionized by the radiation emitted from the radioactive substance. Happens. Therefore, the ionization of the enclosed gas is promoted as compared with the case where the conventional ceramic arc tube containing no radioactive substance is used, so that the discharge lamp discharges at a lower starting voltage, which improves the startability. it can.
【００２５】請求項２記載の発明によれば、低仕事関数
の物質を混合した透光性セラミックスで発光管を形成し
たので、発光管内壁からの電子放出が起こりやすくな
る。従って、封入ガスの電離が起こりやすくなるので、
放電灯はより低い始動電圧で放電するようになり、始動
性を向上させることができる。According to the second aspect of the invention, since the arc tube is formed of the translucent ceramics in which a substance having a low work function is mixed, electrons are easily emitted from the inner wall of the arc tube. Therefore, ionization of the enclosed gas is likely to occur,
The discharge lamp discharges at a lower starting voltage, and the startability can be improved.
【００２６】請求項３記載の発明によれば、透光性セラ
ミックスの発光管の一部分を導電性とするとともに、そ
の導電性部分に始動補助電極を当接したことにより、電
気的エネルギーが発光管内に供給されやすくなるととも
に、始動補助電極とアース間の距離を近づけることによ
って封入ガスの絶縁破壊が起こりやすくなり、放電灯の
始動性を向上させることができる。According to the third aspect of the present invention, a part of the light-transmitting ceramics arc tube is made electrically conductive, and the starting auxiliary electrode is brought into contact with the conductive portion, so that electric energy is generated in the arc tube. In addition to being easily supplied to the discharge lamp, it is easy to cause the dielectric breakdown of the enclosed gas by shortening the distance between the auxiliary starting electrode and the ground, thereby improving the startability of the discharge lamp.
【００２７】請求項４記載の発明によれば、請求項１乃
至請求項３記載の発明と比較して、さらに始動性を向上
させることができる。According to the invention described in claim 4, the startability can be further improved as compared with the invention described in claims 1 to 3.
【図１】本発明の第１実施形態を摸式的に示す概略図で
ある。FIG. 1 is a schematic view schematically showing a first embodiment of the present invention.
【図２】本発明の第２実施形態を摸式的に示す概略図で
ある。FIG. 2 is a schematic view schematically showing a second embodiment of the present invention.
【図３】本発明の第３実施形態を摸式的に示す概略図で
ある。FIG. 3 is a schematic view schematically showing a third embodiment of the present invention.
【図４】本発明の第４実施形態を摸式的に示す概略図で
ある。FIG. 4 is a schematic view schematically showing a fourth embodiment of the present invention.
１ 発光管 ３ 始動補助電極 ４ 高電圧パルス電源 ５ 誘導コイル ６ 高周波電源 1 arc tube 3 Starting auxiliary electrode 4 High voltage pulse power supply 5 induction coil 6 high frequency power supply
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渡辺 和彦 大阪府門真市大字門真1048番地松下電工 株式会社内 (56)参考文献 特開 平７−254391（ＪＰ，Ａ) 特開 昭52−65985（ＪＰ，Ａ) 特開 平５−347146（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01J 65/04 H01J 65/06 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Watanabe 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd. (56) Reference JP-A-7-254391 (JP, A) JP-A-52-65985 ( JP, A) JP-A-5-347146 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) H01J 65/04 H01J 65/06
Claims (4)
スで発光管を形成したことを特徴とする無電極放電灯。1. An electrodeless discharge lamp characterized in that an arc tube is formed of translucent ceramics mixed with a radioactive material.
となる低仕事関数の物質を混合した透光性セラミックス
で発光管を形成したことを特徴とする無電極放電灯。2. An emitter material for an electroded discharge lamp.
Electrodeless discharge lamp, characterized in that to form a light-emitting tube in translucent ceramics obtained by mixing substances of low work function to be.
その発光管の一部分を導電性とするとともに、その導電
性部分に始動補助電極を当接したことを特徴とする無電
極放電灯。3. An arc tube is formed of translucent ceramics,
An electrodeless discharge lamp characterized in that a part of the arc tube is made conductive, and a starting auxiliary electrode is brought into contact with the conductive part.
一部分を導電性とするとともに、その導電性部分に始動
補助電極を当接したことを特徴とする無電極放電灯。4. An electrodeless discharge lamp characterized in that a part of the arc tube according to claim 1 or 2 is made electrically conductive, and a starting auxiliary electrode is brought into contact with the electrically conductive part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27118696A JP3424459B2 (en) | 1996-10-14 | 1996-10-14 | Electrodeless lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27118696A JP3424459B2 (en) | 1996-10-14 | 1996-10-14 | Electrodeless lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10116596A JPH10116596A (en) | 1998-05-06 |
| JP3424459B2 true JP3424459B2 (en) | 2003-07-07 |
Family
ID=17496555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27118696A Expired - Fee Related JP3424459B2 (en) | 1996-10-14 | 1996-10-14 | Electrodeless lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3424459B2 (en) |
-
1996
- 1996-10-14 JP JP27118696A patent/JP3424459B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10116596A (en) | 1998-05-06 |
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