JPH0529085A - Noble gas discharge lamp device - Google Patents
Noble gas discharge lamp deviceInfo
- Publication number
- JPH0529085A JPH0529085A JP18113091A JP18113091A JPH0529085A JP H0529085 A JPH0529085 A JP H0529085A JP 18113091 A JP18113091 A JP 18113091A JP 18113091 A JP18113091 A JP 18113091A JP H0529085 A JPH0529085 A JP H0529085A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- rare gas
- effective value
- current flowing
- lamp
- 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.)
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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
(57)【要約】
【目的】点灯中に希ガスの消失を軽減し、輝度維持率を
高くすることができる希ガス放電灯点灯装置を提供しよ
うとするものである。
【構成】希ガスを封入したバルブ１の内部に冷陰極から
なる内部電極４を設けるとともに、外部に外部電極５を
設け、これら内部電極４と外部電極５との間に高周波点
灯回路１０から高周波電圧を印加して点灯させる希ガス
放電灯装置において、上記高周波点灯回路１０は、外部
電極に向かって流れる電流の実効値が内部電極に向かっ
て流れる電流の実効値よりも小さくなるようにした。
【作用】ランプ電流は、内部電極から外部電極に向かう
ランプ電流の実効値Ｉｏに比べて、外部電極から内部電
極に向かうランプ電流の実効値Ｉｉが大きいので、希ガ
スイオンがガラス壁に打ち込まれる割合が少なくなり、
希ガスの消失を防止することができ、長時間に亘り高い
輝度を維持する。
(57) [Abstract] [Purpose] An object of the present invention is to provide a rare gas discharge lamp lighting device capable of reducing the loss of rare gas during lighting and increasing the luminance maintenance rate. [Structure] An internal electrode 4 made of a cold cathode is provided inside a bulb 1 in which a rare gas is sealed, and an external electrode 5 is provided outside, and a high-frequency lighting circuit 10 outputs a high frequency wave between the internal electrode 4 and the external electrode 5. In the rare gas discharge lamp device for applying voltage to light, the high frequency lighting circuit 10 is configured such that the effective value of the current flowing toward the external electrode is smaller than the effective value of the current flowing toward the internal electrode. Since the lamp current has a larger effective value Ii of the lamp current flowing from the outer electrode to the inner electrode than the effective value Io of the lamp current flowing from the inner electrode to the outer electrode, the rare gas ions are implanted into the glass wall. The proportion has decreased,
It is possible to prevent the rare gas from disappearing and maintain high brightness for a long time.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、冷陰極キセノン放電灯
などのような希ガス放電灯装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rare gas discharge lamp device such as a cold cathode xenon discharge lamp.
【０００２】[0002]
【従来の技術】最近、各種計器の指針として小形冷陰極
キセノン放電灯を使用する研究が進められている。この
種の放電灯は、外径が数mmで、長さが１００mm前後とし
た細長いバルブを用い、このバルブ内にキセノンガスを
封入するとともに、バルブの内面にけい光体被膜を形成
してあり、かつバルブの一端に冷陰極からなる内部電極
を封装してある。指針としてはバルブの先端（針の先
端）まで発光領域を欲することからバルブの他端に内部
電極を封装せず、バルブの外部にバルブに沿って帯状の
外部電極を形成てある。そして、これら内部電極と外部
電極との間に数１０ＫＨｚの高周波電圧を印加して点灯
させるようになっている。従来の技術について、図３に
もとづき説明する。図３において１はガラスバルブであ
り、外径が２．４mm、全長が例えば７０mm程度の直管形
をなしており、内部は放電空間２をなしている。2. Description of the Related Art Recently, studies have been made on the use of a small cold cathode xenon discharge lamp as a guide for various instruments. This type of discharge lamp uses an elongated bulb with an outer diameter of several millimeters and a length of around 100 millimeters. Xenon gas is enclosed in this bulb and a phosphor coating is formed on the inner surface of the bulb. An internal electrode made of a cold cathode is sealed at one end of the bulb. As a guide, since a light emitting region is desired up to the tip of the bulb (tip of the needle), the inner electrode is not sealed at the other end of the bulb, but a strip-shaped outer electrode is formed outside the bulb along the bulb. Then, a high frequency voltage of several tens KHz is applied between the internal electrode and the external electrode to turn on the light. The conventional technique will be described with reference to FIG. In FIG. 3, reference numeral 1 denotes a glass bulb, which has a straight tube shape with an outer diameter of 2.4 mm and an overall length of, for example, about 70 mm, and has a discharge space 2 inside.
【０００３】バルブ１の内面には放電空間２に面してけ
い光体被膜３が形成されている。けい光体被膜３は、例
えば各々ブルー、ブリーン、レッドに発光領域を有する
３波長発光けい光体が使用されている。バルブ１の両端
は閉封されており、一端の内部には冷陰極４が封装され
ている。冷陰極４はニッケル板を円筒形に加工して形成
されている。On the inner surface of the bulb 1, a phosphor coating 3 is formed facing the discharge space 2. For the phosphor coating 3, for example, a three-wavelength light-emitting phosphor having light emitting regions in blue, green and red is used. Both ends of the bulb 1 are closed, and a cold cathode 4 is sealed inside one end. The cold cathode 4 is formed by processing a nickel plate into a cylindrical shape.
【０００４】バルブ１の外面には、軸方向に沿って帯状
に伸びる外部電極５が形成されており、この外部電極５
はバルブ１に、例えば銀ペーストを塗布して形成されて
いる。バルブ１の放電空間２にはキセノンが４０Torr
（５．３×１０3 ＫＰａ）封入されている。An external electrode 5 is formed on the outer surface of the bulb 1 and extends in the shape of a strip along the axial direction. The external electrode 5 is formed.
Is formed by applying silver paste, for example, to the bulb 1. Xenon is 40 Torr in the discharge space 2 of the bulb 1.
(5.3 × 10 3 KPa) enclosed.
【０００５】８は高周波点灯回路であり、詳図しないが
プッシュプル形（２石形）のインバ−タ回路を備え、周
波数３０ＫＨｚの正弦波電圧をランプに供給するように
なっている。A high-frequency lighting circuit 8 is provided with a push-pull (two-stone) inverter circuit, which is not shown in detail, and supplies a sinusoidal voltage having a frequency of 30 KHz to the lamp.
【０００６】このような構成の点灯装置においては、電
圧が内部電極４と外部電極５に交互に印加され、したが
って内部電極４から外部電極５に向かうランプ電流Ｉｏ
と、外部電極５から内部電極４に向かうランプ電流Ｉｉ
とが交互に発生し、高周波点灯されるようになってい
る。In the lighting device having such a structure, the voltage is alternately applied to the inner electrode 4 and the outer electrode 5, and therefore the lamp current Io from the inner electrode 4 to the outer electrode 5 is applied.
And the lamp current Ii from the outer electrode 5 to the inner electrode 4
And occur alternately, and high frequency lighting is performed.
【０００７】この場合、点灯回路８はプッシュプル形
（２石形）のインバ−タ回路であるから、図１の（Ｂ）
図のランプ電流波形に示すように、内部電極４から外部
電極５に向かうランプ電流の実効値Ｉｏと、外部電極５
から内部電極４に向かうランプ電流の実効値Ｉｉは同じ
であり、例えばＩｏ＝Ｉｉ＝３〜４ｍＡとなる。In this case, since the lighting circuit 8 is a push-pull type (two-stone type) inverter circuit, it is shown in FIG.
As shown in the lamp current waveform in the figure, the effective value Io of the lamp current flowing from the inner electrode 4 to the outer electrode 5 and the outer electrode 5
The effective value Ii of the lamp current flowing from the internal electrode 4 to the internal electrode 4 is the same, for example, Io = Ii = 3 to 4 mA.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、上記の
ような内部・外部電極形のキセノン放電灯の場合は、点
灯中にキセノンガスの封入量が減少し、点灯時間の経過
にともなって輝度が低下する現象がみられる。However, in the case of the above-mentioned internal / external electrode type xenon discharge lamp, the amount of xenon gas enclosed decreases during lighting, and the brightness decreases as the lighting time elapses. There is a phenomenon.
【０００９】すなわち、内部電極４と外部電極５に正弦
波を印加すると、内部電極４から外部電極５に電流が流
れる半サイクルと、外部電極５から内部電極４に電流が
流れる半サイクルが交互に発生する。内部電極４から外
部電極５に電流が流れる半サイクルの放電中に、放電空
間２内で電離されたキセノンイオンが外部電極５に引か
れてガラス壁に打ち込まれ、このキセノンイオンのガラ
ス壁への打ち込み割合は、電流にほぼ比例する。That is, when a sine wave is applied to the inner electrode 4 and the outer electrode 5, a half cycle in which a current flows from the inner electrode 4 to the outer electrode 5 and a half cycle in which a current flows from the outer electrode 5 to the inner electrode 4 alternate. Occur. During a half-cycle discharge in which a current flows from the internal electrode 4 to the external electrode 5, the xenon ions ionized in the discharge space 2 are attracted to the external electrode 5 and driven into the glass wall. The implantation rate is almost proportional to the current.
【００１０】この結果、図４に示す管内キセノンガス圧
の変化特性から判るように、点灯中キセノンガスがバル
ブ壁に打ち込まれて消失し、点灯時間の経過にともなっ
てキセノンガスの封入圧が低下する。なお、図４では破
線が上記従来の場合の特性である。As a result, as can be seen from the change characteristics of the xenon gas pressure in the tube shown in FIG. 4, the xenon gas is driven into the bulb wall and disappears during lighting, and the filling pressure of xenon gas decreases as the lighting time elapses. To do. In addition, in FIG. 4, the broken line represents the characteristic in the conventional case.
【００１１】キセノンガス圧の低下はランプの輝度を低
下させる。つまり、図５には点灯時間に対する輝度維持
率の特性を示してあり、点灯時間の経過に伴い輝度が低
下することが示されている。但し、輝度の低下はキセノ
ンの消失が原因するばかりでなく、けい光体の劣化も影
響する。したがって、ある時間経過したランプに対して
キセノンの消失分を補ってやれば、輝度がある程度まで
回復する。しかし、輝度が初期の水準まで復帰しない原
因はけい光体の劣化分の輝度低下が発生するためであ
る。よって、図５の実線は、キセノンの消失とけい光体
の劣化とが原因する場合の輝度維持率を示し、破線はけ
い光体の劣化のみが原因する場合の輝度維持率を示す。The reduction in xenon gas pressure reduces the brightness of the lamp. That is, FIG. 5 shows the characteristic of the luminance maintenance ratio with respect to the lighting time, and it is shown that the luminance decreases as the lighting time elapses. However, the decrease in brightness is caused not only by the disappearance of xenon but also by the deterioration of the phosphor. Therefore, if the loss of xenon is compensated for the lamp after a certain period of time, the brightness is restored to some extent. However, the reason why the brightness does not return to the initial level is that the brightness decreases due to the deterioration of the phosphor. Therefore, the solid line in FIG. 5 shows the luminance retention rate when the disappearance of xenon and the deterioration of the phosphor are the causes, and the broken line shows the luminance maintenance rate when the cause is only the deterioration of the phosphor.
【００１２】このようなことから、内部電極４から外部
電極５に電流が流れる半サイクルの放電中における電流
値が大きいと、放電空間２内のキセノンイオンがガラス
壁に打ち込まれて消失する割合が大きくなり、輝度の低
下を促進させる要因になることをつきとめた。From the above, when the current value during the half-cycle discharge in which a current flows from the inner electrode 4 to the outer electrode 5 is large, the proportion of xenon ions in the discharge space 2 which are driven into the glass wall and disappeared is high. It has become clear that it becomes a factor that accelerates the decrease in brightness.
【００１３】なお、バルブ内に一対の内部電極を設け
て、内部電極間同志で放電させるようにしたキセノン放
電灯では、上記のようなキセノンの消失は顕著に発生し
ないことが確認されている。It has been confirmed that in the xenon discharge lamp in which a pair of internal electrodes are provided in the bulb so that the internal electrodes discharge each other, the above-mentioned disappearance of xenon does not occur remarkably.
【００１４】本発明はこのような事情にもとづきなされ
たもので、その目的とするのは、点灯中にキセノンなど
のような希ガスの消失を軽減し、輝度維持率を高くする
ことができる希ガス放電灯装置を提供しようとするもの
である。The present invention has been made in view of the above circumstances, and an object thereof is to reduce the disappearance of a rare gas such as xenon during lighting and to increase the luminance maintaining ratio. An object of the present invention is to provide a gas discharge lamp device.
【００１５】[0015]
【課題を解決するための手段】本発明は、放電用希ガス
を封入したバルブの内部に内部電極を設けるとともに、
外部に外部電極を設け、これら内部電極と外部電極との
間に高周波点灯回路から高周波電圧を印加し、上記希ガ
スを電離させて点灯させる希ガス放電灯装置において、
上記高周波点灯回路は、外部電極側に向かって流れる電
流の実効値が内部電極側に向かって流れる電流の実効値
よりも小さくなるような電圧を、上記ランプに印加する
ようにしたことを特徴とする。The present invention provides an internal electrode inside a bulb in which a rare gas for discharge is sealed, and
In a rare gas discharge lamp device for externally providing an external electrode, applying a high frequency voltage from a high frequency lighting circuit between the internal electrode and the external electrode, and ionizing the rare gas by ionizing,
The high-frequency lighting circuit is characterized in that a voltage is applied to the lamp such that the effective value of the current flowing toward the external electrode side is smaller than the effective value of the current flowing toward the internal electrode side. To do.
【００１６】[0016]
【作用】本発明によれば、ランプ電流を、内部電極から
外部電極に向かうランプ電流の実効値Ｉｏに比べて、外
部電極から内部電極に向かうランプ電流の実効値Ｉｉが
大きくなるように（Ｉｏ＜Ｉｉ）したので、放電空間内
で電離された放電用希ガスのイオンがガラス壁に打ち込
まれる割合が少なくなり、希ガスの消失を防止すること
ができ、長時間に亘り高い輝度を維持することができ
る。According to the present invention, the effective value Ii of the lamp current flowing from the outer electrode to the inner electrode is larger than the effective value Io of the lamp current flowing from the inner electrode to the outer electrode (Io Since <Ii), the ratio of the ions of the discharge rare gas ionized in the discharge space to the glass wall is reduced, the disappearance of the rare gas can be prevented, and high brightness can be maintained for a long time. be able to.
【００１７】[0017]
【実施例】以下本発明について、図１ないし図２に示す
一実施例にもとづき説明する。図面は指針用の陰極キセ
ノン放電灯装置を示し、図３の場合と同一の部材は同一
番号を付して説明する。すなわち、１はガラスバルブ、
２は放電空間、３はけい光体被膜、４は冷陰極からなる
内部電極、５はバルブ１の外面に設けられた外部電極で
ある。また、バルブ１内にはキセノンが４０Torr（５．
３×１０3 ＫＰａ）封入されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in FIGS. The drawing shows a cathode xenon discharge lamp device for a pointer, and the same members as those in FIG. 3 will be described with the same reference numerals. That is, 1 is a glass bulb,
Reference numeral 2 is a discharge space, 3 is a phosphor coating, 4 is an internal electrode made of a cold cathode, and 5 is an external electrode provided on the outer surface of the bulb 1. In addition, 40 Torr (5.
3 x 10 3 KPa) enclosed.
【００１８】１０は高周波点灯回路であり、本実施例の
場合はブロッキング発振形の１石インバ−タ回路を備て
おり、周波数３０ＫＨｚの正弦波電圧をランプに供給す
るようになっている。A high-frequency lighting circuit 10 is provided with a blocking oscillation type single-stone inverter circuit in the present embodiment, and supplies a sine wave voltage of a frequency of 30 KHz to the lamp.
【００１９】この高周波点灯回路１０について、図２に
もとづき説明すると、１１は交流電源、１２は整流器、
１３は平滑コンデンサ、１４はブロッキング発振形イン
バ−タ回路、１５はチョークコイルである。The high-frequency lighting circuit 10 will be described with reference to FIG. 2. 11 is an AC power source, 12 is a rectifier,
Reference numeral 13 is a smoothing capacitor, 14 is a blocking oscillation type inverter circuit, and 15 is a choke coil.
【００２０】ブロッキング発振形インバ−タ回路１４
は、発振トランス１６、共振用コンデンサ１７、スイッ
チングトランジスタ１８、ベースインダクタ１９、ダイ
オード２０、コンデンサ２１などを備えている。Blocking oscillation type inverter circuit 14
Includes an oscillation transformer 16, a resonance capacitor 17, a switching transistor 18, a base inductor 19, a diode 20, a capacitor 21, and the like.
【００２１】このような高周波点灯回路１０は、周波数
３０ＫＨｚの正弦波電圧をランプに供給するものである
が、外部電極５に印加する電圧を、内部電極４に印加す
る電圧より大きくしてある。このため、内部電極４から
外部電極５に向かうランプ電流の実効値Ｉｏに比べて、
外部電極５から内部電極４に向かうランプ電流の実効値
Ｉｉの方が大きくなっており（Ｉｏ＜Ｉｉ）、例えばＩ
ｏ＝２ｍＡ、Ｉｉ＝６ｍＡとなるように設定してあり、
トータル値（Ｉｏ＋Ｉｉ）では従来の場合と同等になる
ようにしてある。The high-frequency lighting circuit 10 as described above supplies a sine wave voltage having a frequency of 30 KHz to the lamp, but the voltage applied to the outer electrode 5 is made higher than the voltage applied to the inner electrode 4. Therefore, as compared with the effective value Io of the lamp current flowing from the inner electrode 4 to the outer electrode 5,
The effective value Ii of the lamp current flowing from the outer electrode 5 to the inner electrode 4 is larger (Io <Ii).
It is set so that o = 2 mA and Ii = 6 mA,
The total value (Io + Ii) is made equal to that in the conventional case.
【００２２】このような構成においては、内部電極４か
ら外部電極５に向かうランプ電流の実効値Ｉｏと、外部
電極５から内部電極４に向かうランプ電流の実効値Ｉｉ
を、非対称にしてあるが、トータル値（Ｉｏ＋Ｉｉ）は
従来の場合と同等になっているので、初期の輝度を従来
と同等にすることができる。In such a structure, the effective value Io of the lamp current flowing from the inner electrode 4 to the outer electrode 5 and the effective value Ii of the lamp current flowing from the outer electrode 5 to the inner electrode 4 are set.
However, since the total value (Io + Ii) is the same as that of the conventional case, the initial luminance can be made equal to that of the conventional case.
【００２３】そして、内部電極４から外部電極５に向か
うランプ電流の実効値Ｉｏに比べて、外部電極５から内
部電極４に向かうランプ電流の実効値Ｉｉの方を大きく
した（Ｉｏ＜Ｉｉ）ので、内部電極４から外部電極５に
電流が流れる半サイクルの放電中における電流値が低い
ため、放電空間２内で電離されたキセノンイオンが外部
電極５に引かれる力が弱くなる。このためキセノンがガ
ラス壁に打ち込まれる割合が減じられ、長期の点灯であ
ってもキセノンの消失を軽減することができ、この結
果、図４に示す管内キセノンガス圧の変化特性は、実線
から判るように、点灯時間の経過にともなってキセノン
ガスの封入圧が低下する割合を少なくすることができ
る。したがって、長期の点灯による輝度の低下を抑制す
ることができ、輝度維持率を高くすることができる。Since the effective value Ii of the lamp current flowing from the outer electrode 5 to the inner electrode 4 is larger than the effective value Io of the lamp current flowing from the inner electrode 4 to the outer electrode 5 (Io <Ii). Since the current value during the half-cycle discharge in which a current flows from the inner electrode 4 to the outer electrode 5 is low, the force with which the xenon ions ionized in the discharge space 2 are attracted to the outer electrode 5 becomes weak. Therefore, the ratio of xenon being driven into the glass wall is reduced, and the disappearance of xenon can be reduced even during long-term lighting. As a result, the change characteristic of the xenon gas pressure in the tube shown in FIG. 4 can be seen from the solid line. As described above, it is possible to reduce the rate at which the filling pressure of the xenon gas decreases as the lighting time elapses. Therefore, it is possible to suppress a decrease in brightness due to long-term lighting and increase the brightness maintenance rate.
【００２４】また、キセノンの消失が原因となるランプ
寿命は、従来の場合約１５０００時間であるのに対し、
上記実施例の場合は２５０００時間となり、寿命が長く
なることが確認されている。なお、本発明は上記の実施
例に制約されるものではない。The lamp life due to the disappearance of xenon is about 15,000 hours in the conventional case, whereas
In the case of the above embodiment, it has been confirmed that the life is 25,000 hours and the life is long. The present invention is not limited to the above embodiment.
【００２５】すなわち、本発明は希ガスとして用いるガ
スはキセノンに制約されず、キセノンを主体としてアル
ゴン、ネオン、クリプトンなどを混合したガスであって
もよく、キセノン以外のガスを封入してもよい。また、
インバ−タ回路１４は１石形であれば、ランプ電流のＩ
ｏとＩｉを非対称にすることができ、種々の回路構造が
実施可能である。さらに、本発明のランプは計器の指針
に用いることに限らず、液晶表示装置のバックライトな
どに使用するランプであってもよい。That is, the gas used as the rare gas in the present invention is not limited to xenon, and may be a gas containing xenon as a main component and mixed with argon, neon, krypton or the like, or a gas other than xenon may be enclosed. . Also,
If the inverter circuit 14 is a one-stone type, the lamp current I
The o and Ii can be asymmetric and various circuit structures can be implemented. Furthermore, the lamp of the present invention is not limited to being used as a pointer of a meter, but may be a lamp used as a backlight of a liquid crystal display device.
【００２６】[0026]
【発明の効果】以上説明した通り本発明によれば、ラン
プに印加する電圧はランプ電流が、内部電極から外部電
極に向かうランプ電流の実効値Ｉｏに比べて、外部電極
から内部電極に向かうランプ電流の実効値Ｉｉが大きく
なる（Ｉｏ＜Ｉｉ）ようにしたから、内部電極から外部
電極にランプ電流が流れる場合に発生する希ガスイオン
がガラス壁に打ち込まれる割合を少なくすることができ
る。このため点灯中に希ガスの消失を抑止することがで
き、長時間に亘り高い輝度を維持することができる利点
がある。As described above, according to the present invention, the voltage applied to the lamp is such that the lamp current goes from the inner electrode to the inner electrode compared to the effective value Io of the lamp current going from the inner electrode to the outer electrode. Since the effective value Ii of the current is set to be large (Io <Ii), it is possible to reduce the ratio of the rare gas ions generated when the lamp current flows from the inner electrode to the outer electrode, which are driven into the glass wall. Therefore, there is an advantage that the disappearance of the rare gas can be suppressed during lighting and high brightness can be maintained for a long time.
【図１】本発明の一実施例を示し、（Ａ）図は冷陰極キ
セノン放電灯の全体の断面図、（Ｂ）図はその電流波形
の特性図。FIG. 1 shows an embodiment of the present invention, FIG. 1A is a sectional view of an entire cold cathode xenon discharge lamp, and FIG. 1B is a characteristic diagram of its current waveform.
【図２】同例の高周波点灯回路の回路図。FIG. 2 is a circuit diagram of a high frequency lighting circuit of the same example.
【図３】従来の示し、（Ａ）図は冷陰極キセノン放電灯
の全体の断面図、（Ｂ）図はその電流波形の特性図。FIG. 3 shows a conventional example, FIG. 3A is a sectional view of the entire cold cathode xenon discharge lamp, and FIG. 3B is a characteristic diagram of its current waveform.
【図４】点灯時間に対するキセノンガス圧の変化割合を
示す特性図。FIG. 4 is a characteristic diagram showing a rate of change in xenon gas pressure with respect to lighting time.
【図５】点灯時間に対する輝度維持率を示す特性図。FIG. 5 is a characteristic diagram showing a luminance maintenance rate with respect to lighting time.
１…バルブ、２…放電空間、３…けい光体被膜、４…内
部電極、５…外部電極、１０…高周波点灯回路。1 ... Bulb, 2 ... Discharge space, 3 ... Fluorescent film, 4 ... Internal electrode, 5 ... External electrode, 10 ... High frequency lighting circuit.
Claims (3)
バルブの内部に内部電極を設けるとともに外部に外部電
極を設け、これら内部電極と外部電極との間に高周波点
灯回路から高周波電圧を印加し、上記放電用希ガスを電
離させて点灯させる希ガス放電灯装置において、 上記高周波点灯回路は、外部電極側に向かって流れる電
流の実効値が内部電極側に向かって流れる電流の実効値
よりも小さくなるような電圧を、上記ランプに印加する
ようにしたことを特徴とする希ガス放電灯装置。1. A rare gas for discharge is sealed in a bulb, an internal electrode is provided inside the bulb, and an external electrode is provided outside, and a high-frequency voltage is applied between the internal electrode and the external electrode from a high-frequency lighting circuit. In the rare gas discharge lamp device for applying and ionizing the discharge rare gas for lighting, in the high frequency lighting circuit, the effective value of the current flowing toward the outer electrode side is the effective value of the current flowing toward the inner electrode side. A rare gas discharge lamp device characterized in that a voltage which is smaller than the above is applied to the lamp.
セノンを主体とする不活性ガスであることを特徴とする
請求項１に記載の希ガス放電灯装置。2. The rare gas discharge lamp device according to claim 1, wherein the rare gas for discharge is xenon or an inert gas mainly containing xenon.
とする請求項１または２に記載の希ガス放電灯装置。3. The rare gas discharge lamp device according to claim 1, wherein the internal electrode is a cold cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18113091A JPH0529085A (en) | 1991-07-22 | 1991-07-22 | Noble gas discharge lamp device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18113091A JPH0529085A (en) | 1991-07-22 | 1991-07-22 | Noble gas discharge lamp device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0529085A true JPH0529085A (en) | 1993-02-05 |
Family
ID=16095400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18113091A Pending JPH0529085A (en) | 1991-07-22 | 1991-07-22 | Noble gas discharge lamp device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0529085A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5698955A (en) * | 1994-09-01 | 1997-12-16 | Toyota Jidosha Kabushiki Kaisha | Method of controlling generated power in series hybrid vehicle |
| KR100399243B1 (en) * | 1995-05-12 | 2003-11-14 | 파텐트-트로이한트-게젤샤프트 퓌어 엘렉트리쉐 글뤼람펜 엠베하 | Discharge lamp and device for operating it |
| WO2004004424A1 (en) * | 2002-07-01 | 2004-01-08 | Matsushita Electric Industrial Co., Ltd. | Discharge lamp device and backlight |
| US6806647B2 (en) | 2001-09-19 | 2004-10-19 | Matsushita Electric Industrial Co., Ltd. | Light source device with discontinuous electrode contact portions and liquid crystal display |
| US6806648B2 (en) | 2001-11-22 | 2004-10-19 | Matsushita Electric Industrial Co., Ltd. | Light source device and liquid crystal display device |
| US6891334B2 (en) | 2001-09-19 | 2005-05-10 | Matsushita Electric Industrial Co., Ltd. | Light source device and liquid crystal display employing the same |
| US6906461B2 (en) | 2001-12-28 | 2005-06-14 | Matsushita Electric Industrial Co., Ltd. | Light source device with inner and outer electrodes and liquid crystal display device |
| US7276851B2 (en) | 2002-04-19 | 2007-10-02 | West Electric Co., Ltd. | Discharge lamp device and backlight having external electrode unit |
| US7282861B2 (en) | 2003-08-29 | 2007-10-16 | Matsushita Electric Industrial Co., Ltd. | Light source device, lighting device and liquid crystal display device |
| US7495376B2 (en) | 2003-12-09 | 2009-02-24 | Panasonic Corporation | Light source device, lighting device, and liquid crystal display device |
| US7619361B2 (en) | 2004-01-14 | 2009-11-17 | Panasonic Corporation | Discharge lamp device including an airtight container filled with a noble gas |
-
1991
- 1991-07-22 JP JP18113091A patent/JPH0529085A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5698955A (en) * | 1994-09-01 | 1997-12-16 | Toyota Jidosha Kabushiki Kaisha | Method of controlling generated power in series hybrid vehicle |
| KR100399243B1 (en) * | 1995-05-12 | 2003-11-14 | 파텐트-트로이한트-게젤샤프트 퓌어 엘렉트리쉐 글뤼람펜 엠베하 | Discharge lamp and device for operating it |
| US6806647B2 (en) | 2001-09-19 | 2004-10-19 | Matsushita Electric Industrial Co., Ltd. | Light source device with discontinuous electrode contact portions and liquid crystal display |
| US6891334B2 (en) | 2001-09-19 | 2005-05-10 | Matsushita Electric Industrial Co., Ltd. | Light source device and liquid crystal display employing the same |
| US6946796B2 (en) | 2001-09-19 | 2005-09-20 | Matsushita Electric Industrial Co., Ltd. | Light source device and liquid crystal display employing the same |
| US6806648B2 (en) | 2001-11-22 | 2004-10-19 | Matsushita Electric Industrial Co., Ltd. | Light source device and liquid crystal display device |
| US6906461B2 (en) | 2001-12-28 | 2005-06-14 | Matsushita Electric Industrial Co., Ltd. | Light source device with inner and outer electrodes and liquid crystal display device |
| US7276851B2 (en) | 2002-04-19 | 2007-10-02 | West Electric Co., Ltd. | Discharge lamp device and backlight having external electrode unit |
| WO2004004424A1 (en) * | 2002-07-01 | 2004-01-08 | Matsushita Electric Industrial Co., Ltd. | Discharge lamp device and backlight |
| US7282861B2 (en) | 2003-08-29 | 2007-10-16 | Matsushita Electric Industrial Co., Ltd. | Light source device, lighting device and liquid crystal display device |
| US7495376B2 (en) | 2003-12-09 | 2009-02-24 | Panasonic Corporation | Light source device, lighting device, and liquid crystal display device |
| US7619361B2 (en) | 2004-01-14 | 2009-11-17 | Panasonic Corporation | Discharge lamp device including an airtight container filled with a noble gas |
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