【0001】[0001]
【産業上の利用分野】本発明は、ランプ内部に電極を持
たず、外部からの高周波電磁界によってランプ内部の希
ガスを放電、発光させる無電極低圧希ガス蛍光ランプに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrodeless low pressure rare gas fluorescent lamp which has no electrode inside the lamp and discharges and emits a rare gas inside the lamp by a high frequency electromagnetic field from the outside.
【0002】[0002]
【従来の技術】近年、長寿命、高効率の無電極放電ラン
プが実用化されている。2. Description of the Related Art In recent years, an electrodeless discharge lamp having a long life and high efficiency has been put into practical use.
【0003】このランプは、放電気体を封入した放電容
器に近接して配置した誘導コイルに高周波電流を通電
し、発生する誘導電磁界で放電容器内の放電気体を放
電、発光させるものである。In this lamp, a high-frequency current is passed through an induction coil arranged in the vicinity of a discharge vessel in which a discharge gas is sealed, and the generated induction electromagnetic field causes the discharge gas in the discharge vessel to discharge and emit light.
【0004】図3はその一例を示すもので、希ガスと水
銀を封入したバルブ1に近接して配置した誘導コイル4
に、高周波電源5から出力される高周波電流を通電し、
発生する誘導電磁界でバルブ1内の水銀原子を励起して
紫外線を放射し、この紫外線をバルブ1の内面に塗布し
た蛍光体(図示せず)に照射することにより可視光を得
るようにした無電極蛍光ランプである。FIG. 3 shows an example of this, and an induction coil 4 arranged in the vicinity of a bulb 1 in which a rare gas and mercury are sealed.
The high-frequency current output from the high-frequency power source 5, and
The generated induction electromagnetic field excites the mercury atoms in the bulb 1 to emit ultraviolet rays, and the ultraviolet rays are applied to the phosphor (not shown) applied to the inner surface of the bulb 1 to obtain visible light. It is an electrodeless fluorescent lamp.
【0005】なお、図3において、6は導電体で構成さ
れた装置本体で、ランプや高周波発生回路から発生する
放射ノイズを除去する。7は導電性メッシュで構成され
た電磁シールド手段で、ランプからの照射光を透過する
と共に、照射面からのノイズ漏洩を防ぐ。In FIG. 3, reference numeral 6 is a main body made of a conductor, which removes radiation noise generated from a lamp or a high frequency generating circuit. Reference numeral 7 is an electromagnetic shield means composed of a conductive mesh, which transmits the irradiation light from the lamp and prevents noise leakage from the irradiation surface.
【0006】この無電極蛍光ランプは、バルブ1内に電
極を持たないため、電極切れの心配がなく、長寿命であ
る。また、ランプの形状が自由に設計できるといった特
徴もある。Since this electrodeless fluorescent lamp does not have an electrode inside the bulb 1, there is no fear of electrode breakage and it has a long life. Another feature is that the shape of the lamp can be freely designed.
【0007】[0007]
【発明が解決しようとする課題】しかしながら、かかる
無電極蛍光ランプは、水銀の発光を利用しているため、
低温時には水銀蒸気圧が下がり、光束が減少する。ま
た、光束立ち上がりが悪い等の問題がある。However, since such an electrodeless fluorescent lamp utilizes the light emission of mercury,
At low temperatures, the mercury vapor pressure drops and the luminous flux decreases. Further, there is a problem that the luminous flux rises poorly.
【0008】本発明は、上記問題点に鑑みなされたもの
で、その目的とするところは、温度特性に優れ、光束立
ち上がりが早く、しかも発光効率の良い無電極低圧希ガ
ス蛍光ランプを提供することにある。The present invention has been made in view of the above problems, and an object of the present invention is to provide an electrodeless low-pressure rare gas fluorescent lamp having excellent temperature characteristics, fast luminous flux rise, and good luminous efficiency. It is in.
【0009】[0009]
【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、透光性の放電容器内に封入された希ガスを高
周波電磁界によって放電させるとともに、前記放電容器
内面に塗布した蛍光体によって可視光に変換してなる無
電極低圧希ガス蛍光ランプにおいて、前記希ガスを容積
比で50%以下のキセノンと残部アルゴンとの混合希ガ
スとしたことを特徴とする。In order to solve the above-mentioned problems, the present invention is to discharge a rare gas enclosed in a translucent discharge vessel by a high frequency electromagnetic field, and at the same time, a phosphor coated on the inner surface of the discharge vessel. In the electrodeless low-pressure rare gas fluorescent lamp converted into visible light by the above, the rare gas is a mixed rare gas of 50% or less by volume of xenon and the balance argon.
【0010】[0010]
【作用】上記のように、放電容器内の希ガスを発光させ
るため、温度に関係なく一定の光束を得ることができ、
また、光束立ち上がりも早い。しかも、希ガスを容積比
で50%以下のキセノンと残部アルゴンとの混合希ガス
としたことにより、キセノン単一やアルゴン単一の場合
より発光効率が良くなる。As described above, since the rare gas in the discharge vessel is caused to emit light, a constant luminous flux can be obtained regardless of temperature,
Also, the luminous flux rises quickly. Moreover, since the rare gas is a mixed rare gas containing 50% or less by volume of xenon and the balance argon, the luminous efficiency is improved as compared with the case of using only xenon or argon.
【0011】[0011]
【実施例】図1は本発明の一実施例を示すもので、図
中、1は放電容器としてのバルブであって、内面には蛍
光体2が塗布されている。また、バルブ1の内部には、
容積比で50%以下のキセノンと残部アルゴンとの混合
希ガス3が封入されている。4はバルブ1の外周に巻か
れた誘導コイル、5は誘導コイル4に高周波電流を通電
する高周波電源である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention. In the drawing, reference numeral 1 is a bulb as a discharge container, and a phosphor 2 is applied to the inner surface thereof. Also, inside the valve 1,
A mixed rare gas 3 of xenon and the balance argon of 50% or less in volume ratio is enclosed. Reference numeral 4 is an induction coil wound around the outer circumference of the valve 1, and 5 is a high-frequency power source for supplying a high-frequency current to the induction coil 4.
【0012】このように構成された無電極低圧希ガス蛍
光ランプの誘導コイル4に高周波電流を通電すると、電
磁界が誘導され、バルブ1内の混合希ガス3が放電、発
光する。そして、この混合希ガス3から発せられた紫外
線が蛍光体2により可視光に変換される。When a high-frequency current is passed through the induction coil 4 of the electrodeless low-pressure rare gas fluorescent lamp constructed as described above, an electromagnetic field is induced, and the mixed rare gas 3 in the bulb 1 is discharged and emits light. Then, the ultraviolet rays emitted from the mixed rare gas 3 are converted into visible light by the phosphor 2.
【0013】図2はキセノンとアルゴンの混合比を変え
たときの相対輝度を示すグラフで、全圧が0.5 Torr、1.
0 Torr、2.0 Torrの場合を示す。ここで、相対輝度は、
0.5Torrの最大輝度を100%とした。FIG. 2 is a graph showing the relative luminance when the mixing ratio of xenon and argon is changed, and the total pressure is 0.5 Torr, 1.
The case of 0 Torr and 2.0 Torr is shown. Where the relative brightness is
The maximum brightness of 0.5 Torr is 100%.
【0014】この図から明らかなように、全圧に関係な
く、キセノンの混合比が50%以下の場合は、キセノン
単一やアルゴン単一の場合よりも相対輝度が高くなって
いることが分かる。As is clear from this figure, the relative luminance is higher when the mixing ratio of xenon is 50% or less, irrespective of the total pressure, as compared with the case where only xenon is used or only argon is used. ..
【0015】なお、本発明は上記実施例に限定されるも
のでないことは勿論であり、例えば放電容器1内の混合
希ガス3に高周波電磁界を印加する手段は、上記実施例
に限定されず、どのようなものでもよい。It is needless to say that the present invention is not limited to the above embodiment, and means for applying a high frequency electromagnetic field to the mixed rare gas 3 in the discharge vessel 1 is not limited to the above embodiment. , It can be anything.
【0016】[0016]
【発明の効果】本発明は上記のように、放電容器内に封
入する希ガスを容積比で50%以下のキセノンと残部ア
ルゴンとの混合希ガスとしたことにより、温度に関係な
く一定の光束を得ることができるとともに、光束立ち上
がりも早く、しかも発光効率の良い無電極低圧希ガス蛍
光ランプを提供できる。As described above, according to the present invention, the rare gas sealed in the discharge vessel is a mixed rare gas of xenon and the balance argon of 50% or less in volume ratio, so that the luminous flux is constant regardless of the temperature. In addition, it is possible to provide an electrodeless low-pressure rare gas fluorescent lamp which has a high luminous efficiency and a high luminous efficiency.
【図1】本発明の一実施例を示す一部断面の正面図であ
る。FIG. 1 is a partial cross-sectional front view showing an embodiment of the present invention.
【図2】キセノンとアルゴンの混合比を変えたときの相
対輝度を示すグラフである。FIG. 2 is a graph showing relative luminance when the mixing ratio of xenon and argon is changed.
【図3】従来例を示す正面図である。FIG. 3 is a front view showing a conventional example.
【符号の説明】 1 放電容器(バルブ) 2 螢光体 3 混合希ガス 4 誘導コイル 5 高周波電源[Explanation of symbols] 1 discharge vessel (bulb) 2 fluorescent material 3 mixed rare gas 4 induction coil 5 high frequency power supply
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3028792AJPH05225960A (en) | 1992-02-18 | 1992-02-18 | Electrodeless low pressure rare gas type fluorescent lamp |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3028792AJPH05225960A (en) | 1992-02-18 | 1992-02-18 | Electrodeless low pressure rare gas type fluorescent lamp |
| Publication Number | Publication Date |
|---|---|
| JPH05225960Atrue JPH05225960A (en) | 1993-09-03 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3028792APendingJPH05225960A (en) | 1992-02-18 | 1992-02-18 | Electrodeless low pressure rare gas type fluorescent lamp |
| Country | Link |
|---|---|
| JP (1) | JPH05225960A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6522084B1 (en) | 1999-10-18 | 2003-02-18 | Matsushita Electric Industrial Co., Ltd. | Electrodeless discharge lamp operating apparatus |
| WO2003103012A1 (en)* | 2002-06-03 | 2003-12-11 | Matsushita Electric Industrial Co., Ltd. | Device for operating electrodeless low-voltage discharge lamp and bulb-shaped electrodeless fluorescent lamp |
| JP2007073479A (en)* | 2005-09-09 | 2007-03-22 | Phoenix Denki Kk | Discharge lamp unit |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01115047A (en)* | 1987-10-28 | 1989-05-08 | Mitsubishi Electric Corp | Hot cathode low pressure rare gas discharge fluorescent lamp |
| JPH01243365A (en)* | 1988-03-25 | 1989-09-28 | Mitsubishi Electric Corp | Microwave discharge vacuum ultraviolet light source device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01115047A (en)* | 1987-10-28 | 1989-05-08 | Mitsubishi Electric Corp | Hot cathode low pressure rare gas discharge fluorescent lamp |
| JPH01243365A (en)* | 1988-03-25 | 1989-09-28 | Mitsubishi Electric Corp | Microwave discharge vacuum ultraviolet light source device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6522084B1 (en) | 1999-10-18 | 2003-02-18 | Matsushita Electric Industrial Co., Ltd. | Electrodeless discharge lamp operating apparatus |
| WO2003103012A1 (en)* | 2002-06-03 | 2003-12-11 | Matsushita Electric Industrial Co., Ltd. | Device for operating electrodeless low-voltage discharge lamp and bulb-shaped electrodeless fluorescent lamp |
| US7049763B2 (en) | 2002-06-03 | 2006-05-23 | Matsushita Electric Industrial Co., Ltd. | Electrodeless low-pressure discharge lamp operating device and self-ballasted electrodeless fluorescent lamp |
| JP2007073479A (en)* | 2005-09-09 | 2007-03-22 | Phoenix Denki Kk | Discharge lamp unit |
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