JP2930007B2 - Gas discharge display - Google Patents
Gas discharge displayInfo
- Publication number
- JP2930007B2 JP2930007B2 JP13667296A JP13667296A JP2930007B2 JP 2930007 B2 JP2930007 B2 JP 2930007B2 JP 13667296 A JP13667296 A JP 13667296A JP 13667296 A JP13667296 A JP 13667296A JP 2930007 B2 JP2930007 B2 JP 2930007B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- neon
- xenon
- discharge
- helium
- 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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- Gas-Filled Discharge Tubes (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、情報端末機器やパ
ーソナルコンピュータのディスプレイ、あるいは、テレ
ビジョンの画像表示装置などに用いるガス放電型表示装
置に関し、特に封入するガス組成に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas discharge type display device used for a display of an information terminal device or a personal computer, or an image display device of a television, and more particularly to a gas composition to be sealed.
【０００２】[0002]
【従来の技術】放電によって放射された紫外線の励起に
より発光する蛍光体を配してカラー表示を行うガス放電
型表示装置において、高発光輝度で高発光効率な、しか
も色再現性に優れた画像を映し出すためには、用いられ
る放電形式に適合したガス組成を設定することが重要で
ある。2. Description of the Related Art In a gas discharge type display device which performs color display by disposing a phosphor which emits light by excitation of ultraviolet rays emitted by discharge, an image having high light emission luminance, high light emission efficiency and excellent color reproducibility is provided. It is important to set a gas composition suitable for the type of discharge to be used in order to project the image.
【０００３】ところで、カラー表示を行うガス放電型表
示装置の構造として、図５に示す面放電型のガス放電型
表示装置が寿命特性や中間調表示などの点から有望であ
る。このガス放電型表示装置は、走査電極と維持電極よ
りなる面放電電極３を有する第１絶縁基板１と、データ
電極４を有する第２絶縁基板２とを、絶縁体隔壁６を挟
んではりあわせ、この基板間に形成された放電空間５に
放電ガスを封入する。また、面放電電極３は、絶縁体８
と、耐スパッタ性に優れ、かつ、多結晶の酸化マグネシ
ウム（以下、ＭｇＯ）などの高い２次電子放出係数をも
つ保護膜９で覆われている。また、データ電極４は、絶
縁体８に覆われ、絶縁体８の上には、放電にともない、
封入ガス中のキセノン励起原子から放射される真空紫外
線によって励起発光する蛍光体７が配置されている。こ
の蛍光体は、一般に、Ｚｎ2 ＳｉＯ4 ：Ｍｎなどその発
色により選択される。このような構造のガス放電型表示
装置は、フラットディスプレイの中でも応答速度が速
く、かつ、メモリ特性をもつために駆動回路が簡単いな
る等の特徴から大面積ディスプレイに適している。ま
た、面放電型のガス放電型表示装置では、放電空間に封
入される放電ガスとして、ヘリウム＋キセノンあるい
は、ネオン＋キセノンの２成分混合ガスが広く用いられ
ている。As a structure of a gas discharge type display device for performing color display, a surface discharge type gas discharge type display device shown in FIG. 5 is promising in terms of life characteristics and halftone display. In this gas discharge type display device, a first insulating substrate 1 having a surface discharge electrode 3 composed of a scanning electrode and a sustain electrode, and a second insulating substrate 2 having a data electrode 4 are bonded together with an insulating partition wall 6 interposed therebetween. Then, a discharge gas is sealed in a discharge space 5 formed between the substrates. The surface discharge electrode 3 is made of an insulator 8
And a protective film 9 having excellent secondary electron emission coefficient, such as polycrystalline magnesium oxide (hereinafter, MgO), which is excellent in sputter resistance. In addition, the data electrode 4 is covered with the insulator 8, and the
A phosphor 7 that emits light when excited by vacuum ultraviolet rays emitted from xenon excited atoms in the sealed gas is provided. This phosphor is generally selected according to its coloration, such as Zn 2 SiO 4 : Mn. The gas discharge type display device having such a structure is suitable for a large-area display because it has a high response speed among flat displays, and has features such as a simple driving circuit because of its memory characteristics. In a gas discharge type display device of a surface discharge type, a binary gas mixture of helium and xenon or neon and xenon is widely used as a discharge gas sealed in a discharge space.
【０００４】また、これらの他には、特開平６−３４２
６３１に母体ガスをヘリウムとネオンの混合ガスとした
（ヘリウム、ネオン）＋キセノン３成分混合ガスが開示
されている。３成分混合ガス中に含まれるキセノン濃度
および全圧が等しい場合、ヘリウムとネオンの体積比率
をかえても、ネオンに対するヘリウムの体積比率が９割
以下の広い領域で、ヘリウム＋キセノン混合ガスと比較
して、より駆動電圧の低いネオン＋キセノン混合ガスと
同等の電圧で駆動できるだけでなく、３成分混合ガスは
２成分混合ガスのどちらよりも高い発光効率を示す（図
６、図７）。しかしながら、その成分にネオンを含むた
めに、ネオン体積比率が高い範囲では放電によってネオ
ンオレンジの発色が大きなり、色再現性が狭いだけでな
く、発光輝度の半減によって定義されるガス放電表示装
置の輝度寿命も充分ではなかった。In addition to these, Japanese Patent Laid-Open No. 6-342
631 discloses a (helium, neon) + xenon ternary mixed gas in which the base gas is a mixed gas of helium and neon. When the xenon concentration and the total pressure contained in the ternary mixed gas are equal, the volume ratio of helium to neon is compared with the mixed gas of helium and xenon in a wide region of 90% or less of neon even if the volume ratio of helium and neon is changed. Thus, not only can driving be performed at a voltage equal to that of a neon + xenon mixed gas having a lower driving voltage, but also a ternary mixed gas shows higher luminous efficiency than either of the binary mixed gases (FIGS. 6 and 7). However, in order to contain neon in its component, in the range where the neon volume ratio is high, the coloration of neon orange is large due to discharge, not only the color reproducibility is narrow, but also the gas discharge display device defined by half the emission luminance. The luminance life was not sufficient.
【０００５】一方、上記のように母体ガスを混合ガスと
して用いる他、バッファガスとして他のガスを加えて、
色再現性を改善し、輝度寿命を延ばす報告がある。これ
は特開昭６３−２０５０３１に示されているようなネオ
ン＋アルゴン＋キセノン混合ガスであるが、ネオン＋キ
セノン混合ガスに比較しても発光効率が低下するなどガ
ス表示装置に用いる際には、消費電力が増大するために
問題となる。On the other hand, in addition to using the base gas as a mixed gas as described above, another gas is added as a buffer gas,
There are reports that color reproducibility is improved and luminance life is extended. This is a mixed gas of neon + argon + xenon as shown in JP-A-63-205031, but when used in a gas display device, the luminous efficiency is lower than that of a mixed gas of neon + xenon. This causes a problem because power consumption increases.
【０００６】[0006]
【発明が解決しようとする課題】通常、面放電型のガス
放電型表示装置においては、電極面上を保護しているＭ
ｇＯよりなる保護膜表面に、放電空間内の電界によって
加速されたキセノンイオンが衝突することで、ＭｇＯ膜
がスパッタされ、その消失により駆動電圧が上昇した
り、蛍光体上にスパッタ物が付着し、輝度が低下したり
する。このＭｇＯ膜のスパッタを抑制し、安定した駆動
と良好な表示品質を長期間得るためには、キセノンイオ
ンの加速を小さくすることとスパッタリングされたＭｇ
Ｏの拡散長を短くし、電極面上のＭｇＯの消失を抑える
ことが有効であり、このために放電ガスの全圧力を３５
０Ｔｏｒｒから５００Ｔｏｒｒとかなり高い圧力に設定
しなければならない。しかし、カラー表示のガス放電型
表示装置に一般に広く用いられるヘリウム＋キセノン混
合ガスの場合、このような高圧力では駆動電圧が上昇し
てしまう。高い発光輝度を得るため、放電ガスに混合す
るキセノン量を増加する方法をとることもあるが、キセ
ノン増加量にともないさらに駆動電圧が高くなるため、
高耐圧の駆動回路が必要となり、駆動が困難となる。Normally, in a gas discharge type display device of a surface discharge type, an M is used to protect an electrode surface.
When the xenon ions accelerated by the electric field in the discharge space collide with the surface of the protective film made of gO, the MgO film is sputtered, and the driving voltage increases due to the disappearance of the MgO film, and the sputter adheres to the phosphor. And the brightness is reduced. In order to suppress the sputtering of the MgO film and obtain stable driving and good display quality for a long period of time, it is necessary to reduce the acceleration of xenon ions and reduce the sputtered Mg.
It is effective to shorten the diffusion length of O and suppress the disappearance of MgO on the electrode surface.
The pressure must be set at a considerably high pressure from 0 Torr to 500 Torr. However, in the case of a helium + xenon mixed gas generally widely used in a gas discharge type display device for color display, the driving voltage increases at such a high pressure. In order to obtain high emission luminance, a method of increasing the amount of xenon mixed with the discharge gas may be employed, but the driving voltage further increases with the increase in xenon.
A driving circuit with a high withstand voltage is required, and driving becomes difficult.
【０００７】これに対して、同じキセノン量を含んだネ
オン＋キセノン混合ガスは、低電圧で駆動でき、さら
に、キセノンイオンによるＭｇＯのスパッタも緩和され
る。しかし、ネオンの可視発光と蛍光体からの可視発光
とが混ざることによる色再現性の低下、画像表示に必要
な高速動作に対して劣るなどの問題点がある。On the other hand, a mixed gas of neon and xenon containing the same amount of xenon can be driven at a low voltage, and further reduces MgO sputtering by xenon ions. However, there are problems such as a decrease in color reproducibility due to the mixture of visible light emission of neon and visible light emission from the phosphor, and inferior high-speed operation required for image display.
【０００８】前記（ヘリウム、ネオン）＋キセノンの３
成分混合ガスは、ヘリウム＋キセノン混合ガスに比較し
て、低駆動電圧であり高発光効率を有する。一方、ネオ
ン＋キセノン混合ガスに比較しても、高発光効率を有す
る。しかし、（ヘリウム、ネオン）＋キセノン混合ガス
に含まれるネオンに対するヘリウムの比率が６割を超え
ない領域では、放電時に放射されるネオンからの可視発
光が強く、白色表示を行う場合の色温度を著しく低下さ
せるなど色再現性を損なうものであった。また、この色
純度の向上をはかるためには、混合ガス中に含まれるキ
セノン濃度を増加させる方法もあるが、この方法では著
しく放電開始電圧の上昇を伴うため、高耐圧な駆動回路
を準備する必要がある。また、輝度寿命特性に関して
も、（ヘリウム、ネオン）＋キセノン混合ガスはネオン
＋キセノン混合ガスに対して劣るものであった。The above (helium, neon) + xenon 3
The component mixed gas has a lower driving voltage and higher luminous efficiency than the helium + xenon mixed gas. On the other hand, it has high luminous efficiency as compared with neon + xenon mixed gas. However, in a region where the ratio of helium to neon contained in the (helium, neon) + xenon mixed gas does not exceed 60%, the visible light emitted from neon emitted during discharge is strong, and the color temperature for white display is reduced. The color reproducibility was impaired, for example, it was remarkably reduced. In order to improve the color purity, there is a method of increasing the xenon concentration contained in the mixed gas. However, since this method involves a remarkable increase in the discharge starting voltage, a driving circuit having a high breakdown voltage is prepared. There is a need. As for the luminance life characteristics, the (helium, neon) + xenon mixed gas was inferior to the neon + xenon mixed gas.
【０００９】一方、ネオン＋アルゴン、キセノン混合ガ
スでは、特開昭６３−２０５０３１に示されるアルゴン
濃度範囲で色再現性や輝度寿命は改善されるが、発光効
率が低いために、消費電力が大きくなる問題点があっ
た。On the other hand, with a mixed gas of neon + argon and xenon, color reproducibility and luminance life are improved in the argon concentration range disclosed in JP-A-63-205031, but power consumption is large due to low luminous efficiency. There was a problem.
【００１０】[0010]
【課題を解決するための手段】本発明は、放電空間側内
面に一部塗布された蛍光体を設けたガス放電型表示装置
において、放電空間内に封入する放電ガスがヘリウム，
ネオン，キセノンおよびアルゴンの４成分混合ガスであ
ることを特徴とする。４成分混合ガスに含まれるキセノ
ンの混合比を１．５％から１０％とし、かつ、ヘリウム
とネオンの混合比率を３：７から７：３の割合で混合
し、アルゴンの混合比を５％から１０％とすることが望
ましい。SUMMARY OF THE INVENTION The present invention provides a gas discharge type display device provided with a phosphor partially coated on the inner surface of the discharge space, wherein the discharge gas sealed in the discharge space is helium.
It is a four-component mixed gas of neon, xenon and argon. The mixing ratio of xenon contained in the quaternary mixed gas is 1.5% to 10%, the mixing ratio of helium and neon is 3: 7 to 7: 3, and the mixing ratio of argon is 5%. To 10%.
【００１１】[0011]
【発明の実施の形態】本発明においては、キセノンを全
ガス圧に対する分圧比で１．５％から１０％含む４成分
混合ガスに含まれるヘリウムとネオンの混合比率を３：
７から７：３とし、アルゴンを５％から１０％混合する
ことで、駆動電圧を低く保ったままガス中に含まれるネ
オンからの可視発光を弱め色再現性に優れ、輝度寿命が
長く、高い発光効率をもつ良好な画像表示を実現でき
た。DETAILED DESCRIPTION OF THE INVENTION In the present invention, the mixing ratio of helium and neon contained in a four-component gas mixture containing xenon at a partial pressure ratio of 1.5% to 10% with respect to the total gas pressure is 3:
By setting the ratio to 7 to 7: 3 and mixing 5% to 10% of argon, visible light from neon contained in gas is weakened while driving voltage is kept low, color reproducibility is excellent, luminance life is long and high. Good image display with luminous efficiency was realized.
【００１２】特開昭６３−２０５０３１では、ネオン＋
キセノンに対してアルゴンを混合することで、発光輝度
が増加し、輝度寿命が改善されることが報告されてい
る。この中では特に、ネオンの濃度が９０％以上、従っ
てアルゴンの濃度が１０％以下ではガスからの可視発光
が増加し、可視放電色の影響で蛍光体発光の色度値が変
化しまうとともに、発光輝度の低下も著しいとしてい
る。JP-A-63-205031 discloses that neon +
It has been reported that mixing argon with xenon increases the emission luminance and improves the luminance life. In particular, when the concentration of neon is 90% or more, and hence the concentration of argon is 10% or less, visible light emission from the gas increases, and the chromaticity value of the phosphor light emission changes due to the influence of the visible discharge color. The decrease in brightness is also remarkable.
【００１３】また、発光効率は、ネオン＋キセノンに比
較して減少する。これは、表示装置を構成するうえで
は、大きな欠点であった。例えば、放電を維持するため
に必要な電流が一定であっても、放電に必要な電圧が増
加するため、駆動回路に使用する部品の耐電圧が増加
し、表示装置が高価なものとなる。Further, the luminous efficiency is reduced as compared with neon + xenon. This was a major drawback in configuring the display device. For example, even if the current required to maintain the discharge is constant, the voltage required for the discharge increases, so that the withstand voltage of the components used in the drive circuit increases and the display device becomes expensive.
【００１４】しかし、同時にこの特開昭６３−２０５０
３１においては、アルゴン混合範囲で、特にアルゴン混
合範囲が１０％以上でネオン＋キセノンの２成分ガスに
比較して放電開始電圧、放電維持電圧がどちらも上昇す
ることが述べられている。これは、表示装置を構成する
うえでは、大きな問題であった。すなわち、放電に必要
な電圧が増加するため、駆動回路に使用する部品の耐電
圧が増加し、表示装置が高価なものとなってしまう。However, at the same time, Japanese Patent Laid-Open Publication No.
No. 31, it is described that both the discharge starting voltage and the discharge sustaining voltage are increased in the argon mixed range, particularly when the argon mixed range is 10% or more, as compared with the neon + xenon binary gas. This was a major problem in configuring a display device. That is, since the voltage required for discharging increases, the withstand voltage of components used in the drive circuit increases, and the display device becomes expensive.
【００１５】従って、十分にガスからの可視発光を抑
え、輝度低下を招くことなく、かつ低い動作電圧で駆動
できるような適当なアルゴンの混合範囲は必ずしも見い
だされていなかったと考えられる。本発明ではこれらの
問題があるにもかかわらず敢えてアルゴンガスを、特開
平６−３４２６３１において開示された（ヘリウム、ネ
オン）＋キセノン混合ガスに混入して、動作電圧の上昇
を極力抑え、ガスからの発光も十分小さくして、高い発
光効率を保持したまま、更なる長寿命化に成功したもの
である。Therefore, it is considered that an appropriate mixing range of argon that can sufficiently suppress visible light emission from the gas, reduce the luminance, and drive the device at a low operating voltage has not been found. In the present invention, despite these problems, the argon gas is intentionally mixed with the (helium, neon) + xenon mixed gas disclosed in Japanese Patent Application Laid-Open No. 6-342631 to suppress the rise of the operating voltage as much as possible. The light emission of the semiconductor light emitting device has been sufficiently reduced, and the life has been further extended while maintaining high light emission efficiency.
【００１６】特に発光効率が従来のネオン＋アルゴン＋
キセノン混合ガスより高いことは重要である。発光効率
が高いと、同一の電力で得られる表示の輝度が高いので
明るく見やすいディスプレイを実現できる。あるいは、
同一の輝度で表示する場合は、発光に必要な電力を削減
でき、省エネルギー効果が大である。また、駆動回路の
電圧や電流を小さくできるため、駆動回路素子の耐電圧
を下げたり、または電流定格を下げることができ、コス
トダウンと高信頼化を実現できる点でも大変重要であ
る。また長寿命化を図りながら、しかもガスからの発光
輝度を従来よりも大きく引き下げることができるので、
従来よりも色再現範囲が広く、自然色を美しく再現でき
る表示品位の高いカラー表示のガス放電型表示装置を実
現することができた。In particular, the luminous efficiency of the conventional neon + argon +
It is important to be higher than the xenon mixed gas. When the luminous efficiency is high, a display that can be obtained with the same power is high in brightness, so that a bright and easy-to-view display can be realized. Or,
When displaying at the same luminance, the power required for light emission can be reduced, and the energy saving effect is large. Further, since the voltage and current of the drive circuit can be reduced, it is very important in that the withstand voltage of the drive circuit element can be reduced or the current rating can be reduced, and cost reduction and high reliability can be realized. In addition, since the light emission luminance from the gas can be greatly reduced compared to the conventional one while extending the life,
As a result, a gas discharge type display device having a wider color reproduction range and higher color display quality capable of beautifully reproducing natural colors can be realized.
【００１７】図１に（ヘリウム、ネオン）＋キセノン
（４％）＋アルゴン４成分混合ガスに対する放電開始電
圧のアルゴン濃度依存性をヘリウムとネオンの比率（Ｈ
ｅ：Ｎｅ）をパラメータとして示す。図中の比率はヘリ
ウムとネオンの比率をしめしたものであり、ネオン＋ア
ルゴン＋キセノンは図中の（ｄ）に示す０：１０の比率
に相当する。放電開始電圧は、アルゴン０％の位置で示
される従来の（ヘリウム、ネオン）＋キセノン混合ガ
ス、またはアルゴン０％でかつヘリウム無しの点で示さ
れるネオン＋キセノンの混合ガスより１０Ｖ程高くなる
程度で済む。また、ヘリウム（Ｈｅ）が零の点で示され
るネオン＋アルゴン＋キセノン混合ガスに比較しても、
１０Ｖ以内の電圧上昇である。すなわち、アルゴン濃度
が１０％以下では、本発明のガスはアルゴン濃度を増加
させることによる放電開始電圧の増加は小さく、装置の
価格が急上昇するようなことはまったくない。FIG. 1 shows the dependence of the discharge starting voltage on the argon concentration with respect to (helium, neon) + xenon (4%) + argon quaternary mixed gas in the ratio of helium to neon (H
e: Ne) is shown as a parameter. The ratio in the figure is the ratio of helium to neon, and neon + argon + xenon corresponds to the ratio of 0:10 shown in FIG. The discharge starting voltage is about 10 V higher than the conventional (helium, neon) + xenon mixed gas indicated by the position of 0% argon or the neon + xenon mixed gas indicated by the point of 0% argon and no helium. Only needs to be done. Also, compared to a neon + argon + xenon mixed gas in which helium (He) is indicated by a zero point,
The voltage rise is within 10V. That is, when the argon concentration is 10% or less, the gas of the present invention has a small increase in the discharge starting voltage due to the increase in the argon concentration, and the cost of the apparatus does not suddenly increase.
【００１８】図２に（ヘリウム、ネオン）＋キセノン
（４％）＋アルゴン４成分混合ガスに対する白色発光効
率のアルゴン濃度依存性をヘリウムとネオンの比率（Ｈ
ｅ：Ｎｅ）をパラメータとして示す。白色発光効率はア
ルゴン０％の位置で示される従来の（ヘリウム、ネオ
ン）＋キセノン混合ガスより１０％以内の低下の範囲に
抑えられていることが判る。また、ヘリウム（Ｈｅ）が
零の点で示されるネオン＋アルゴン＋キセノン混合ガス
に比較すると、２０％近い効率の改良がなされているこ
とが判る。しかもこの効率改善効果は図中の曲線（ａ）
から（ｃ）をみても明らかなようにアルゴンを混入して
も保持されるという大きな特徴がある。一方、この図に
は示されていないが、ヘリウム＋キセノン（４％）＋ア
ルゴンは放電開始電圧が３００Ｖ以上と、従来の（ヘリ
ウム、ネオン）＋キセノン混合ガスの２３０Ｖより著し
く電圧が高くなり、駆動は困難となる。FIG. 2 shows the dependence of the white luminous efficiency on the argon concentration with respect to (helium, neon) + xenon (4%) + argon quaternary mixed gas in the ratio of helium to neon (H
e: Ne) is shown as a parameter. It can be seen that the white luminous efficiency is suppressed to within 10% of the conventional (helium, neon) + xenon mixed gas indicated by the position of 0% argon. Also, it can be seen that the efficiency is improved by nearly 20% as compared with a mixed gas of neon + argon + xenon in which helium (He) is indicated by a zero point. Moreover, this efficiency improvement effect is shown by the curve (a) in the figure.
As is clear from (c), there is a great feature that it is maintained even when argon is mixed. On the other hand, although not shown in this figure, helium + xenon (4%) + argon has a discharge starting voltage of 300 V or more, which is significantly higher than the conventional (helium, neon) + xenon mixed gas 230 V, Driving becomes difficult.
【００１９】つぎに、図３に（ヘリウム、ネオン）＋キ
セノン（４％）＋アルゴン４成分混合ガスに対するガス
発光輝度のアルゴン濃度依存性をヘリウムとネオンの比
率（Ｈｅ：Ｎｅ）をパラメータとして示す。図３より判
るようにアルゴンを１０％含む図中（ｄ）のネオン＋ア
ルゴン＋キセノン（４％）ガスでは、ガスからの発光輝
度は８ｃｄ／ｍ2 程度である。これ以下のガス発光輝度
を、従来のヘリウム＋ネオン＋キセノン（４％）混合ガ
スで得るには、図３中の（ａ）から（ｃ）と比較するこ
とでネオンに対するヘリウムの割合を７割かそれ以上と
する必要があることがわかる。Next, FIG. 3 shows the dependence of the gas emission luminance on the argon concentration with respect to the mixed gas of (helium, neon) + xenon (4%) + argon using the ratio of helium to neon (He: Ne) as a parameter. . As can be seen from FIG. 3, in the case of the neon + argon + xenon (4%) gas shown in FIG. 3D containing 10% of argon, the emission luminance from the gas is about 8 cd / m 2 . In order to obtain a gas emission luminance lower than this with a conventional helium + neon + xenon (4%) mixed gas, the ratio of helium to neon can be reduced by 70% by comparing (a) to (c) in FIG. It turns out that it is necessary to make it longer.
【００２０】しかし、本発明の４成分ガスでは図３から
判るように、ヘリウムとネオンの比率を図中（ｃ）に示
す３：７程度としても、図中（ｄ）の従来のネオン＋ア
ルゴン＋キセノン混合ガス程度のガス発光輝度とするこ
とができた。しかも、図中（ａ）に相当するヘリウムの
比率を７まで増すと、ガス発光輝度はさらに低く抑える
ことができる。従って、従来のネオン＋アルゴン＋キセ
ノン混合ガスよりもさらに良好な色純度を得ることがで
きた。However, in the four-component gas of the present invention, as can be seen from FIG. 3, even if the ratio of helium to neon is about 3: 7 shown in FIG. Gas emission luminance of about + xenon mixed gas could be obtained. Moreover, when the helium ratio corresponding to (a) in the figure is increased to 7, the gas emission luminance can be further suppressed. Therefore, better color purity than the conventional neon + argon + xenon mixed gas could be obtained.
【００２１】また、図４には発光輝度の初期値からの半
減期によって定義される輝度寿命を示す。（ヘリウム、
ネオン）＋キセノン（４％）放電ガス（Ｈｅ：Ｎｅの比
率は７対３）の場合を１とした時の寿命の相対値を示し
ている。アルゴンを５％以上混合することで長寿命化に
おいて著しい効果が得られることがわかる。特に１０％
混合すると、寿命は従来の（ヘリウム、ネオン）＋キセ
ノン（４％）の場合にくらべて２．５倍にも伸びる著し
い効果のあることが判る。FIG. 4 shows the luminance life defined by the half-life from the initial value of the emission luminance. (helium,
The relative value of the life is shown assuming that the case of a discharge gas of (neon) + xenon (4%) (He: Ne ratio is 7: 3) is 1. It can be seen that a remarkable effect in prolonging the life can be obtained by mixing 5% or more of argon. Especially 10%
It can be seen that the mixing has a remarkable effect that the life is extended by 2.5 times as compared with the conventional (helium, neon) + xenon (4%).
【００２２】なお、図には示さないが、キセノン量を著
しく少なくした場合にはこの効果は充分発揮されない。
また、キセノン量が多すぎると動作電圧の上昇や発光効
率の低下を引き起こすので、キセノン量をむやみに上げ
るわけには行かない。これらのことを勘案するとキセノ
ン量は１．５％以上１０％以下の範囲が適当である。Although not shown in the figure, this effect is not sufficiently exhibited when the amount of xenon is significantly reduced.
On the other hand, if the amount of xenon is too large, the operating voltage will increase and the luminous efficiency will decrease, so that the amount of xenon cannot be increased unnecessarily. Taking these facts into consideration, the amount of xenon is suitably in the range of 1.5% to 10%.
【００２３】以上の実施の形態では、面放電型のガス放
電型表示装置を例にとり、本発明の有効性について説明
したが、本発明は、高発光効率と優れた色再現性が得ら
れ、しかも長寿命であるという点で、放電空間内に放電
による紫外線励起で発光する蛍光体を配し、カラー表示
を行う種々の方式を用いたガス放電型表示装置について
も有効である。In the above embodiments, the effectiveness of the present invention has been described by taking a surface discharge type gas discharge type display device as an example. However, the present invention provides high luminous efficiency and excellent color reproducibility. In addition, in view of the long life, it is also effective for a gas discharge type display device using various methods for performing color display by disposing a phosphor which emits light by ultraviolet excitation by discharge in a discharge space.
【００２４】[0024]
【発明の効果】以上の説明であきらかなように、本発明
の放電ガスを用いることにより、カラー表示を行うガス
放電型表示装置の駆動電圧や、発光効率を適当な値に保
ったまま、ネオンからのガス発光輝度を抑えつつ、輝度
寿命を大幅に改善することができる。したがって、特殊
な高耐圧の駆動回路が不用となるため、駆動回路の製作
が容易であるだけでなく、ネオンからのガス発光輝度を
抑えることで良好な色再現性を得ることができ、しかも
長寿命なカラー表示を行うガス放電型表示装置を提供す
ることができる。As apparent from the above description, by using the discharge gas of the present invention, neon light can be obtained while maintaining the driving voltage and the luminous efficiency of the gas discharge type display device for performing color display at appropriate values. The luminance lifetime can be greatly improved while suppressing the luminance of gas emission from the substrate. Therefore, a special high withstand voltage drive circuit is not required, so not only is the drive circuit easy to manufacture, but also good color reproducibility can be obtained by suppressing the luminance of gas emission from neon light. A gas discharge display device that performs color display with a long life can be provided.
【図１】本発明の実施の形態である４成分混合ガスに対
する放電開始電圧のアルゴン濃度依存性を示したグラフ
である。FIG. 1 is a graph showing an argon concentration dependency of a discharge starting voltage for a four-component mixed gas according to an embodiment of the present invention.
【図２】本発明の実施の形態である４成分混合ガスに対
する白色発光効率のアルゴン濃度依存性を示したグラフ
である。FIG. 2 is a graph showing the argon concentration dependence of white light emission efficiency with respect to a four-component mixed gas according to an embodiment of the present invention.
【図３】本発明の実施の形態である４成分混合ガスに対
するガス発光輝度のアルゴン濃度依存性を示したグラフ
である。FIG. 3 is a graph showing the dependence of gas emission luminance on argon concentration for a four-component mixed gas according to an embodiment of the present invention.
【図４】本発明の実施の形態における発光輝度寿命のア
ルゴン濃度依存性を示したグラフである。FIG. 4 is a graph showing the dependence of the emission luminance life on the argon concentration in the embodiment of the present invention.
【図５】面放電ガス放電表示装置の構造断面図を示すも
のである。FIG. 5 is a sectional view showing the structure of the surface discharge gas discharge display device.
【図６】特許公開平６−３４２６３１記載のヘリウム−
ネオン−キセノン混合ガスに対する放電開始電圧および
最小維持電圧のヘリウム：ネオン比率依存性を示すもの
である。FIG. 6 shows helium described in JP-A-6-342631.
FIG. 3 shows the dependence of the discharge starting voltage and the minimum sustaining voltage on the helium: neon ratio for a neon-xenon mixed gas.
【図７】特許公開平６−３４２６３１記載のヘリウム−
ネオン−キセノン混合ガスに対する発光効率のヘリウム
とネオンとの比率依存性を示すものである。FIG. 7 shows helium described in Japanese Patent Application Laid-Open No. 6-342631.
FIG. 4 shows the dependence of luminous efficiency on the ratio of helium to neon for a neon-xenon mixed gas.
１ 第１絶縁基板 ２ 第２絶縁基板 ３ 面放電電極 ４ データ電極 ５ 放電ガス空間 ６ 絶縁体隔壁 ７ 蛍光体 ８ 絶縁体 ９ 保護膜 REFERENCE SIGNS LIST 1 first insulating substrate 2 second insulating substrate 3 surface discharge electrode 4 data electrode 5 discharge gas space 6 insulator partition 7 phosphor 8 insulator 9 protective film
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H01J 11/02 H01J 11/00 H01J 17/20 H01J 17/49 Continuation of front page (58) Fields investigated (Int.Cl. 6 , DB name) H01J 11/02 H01J 11/00 H01J 17/20 H01J 17/49
Claims (3)
を設け、放電空間内に放電ガスとしてヘリウム，ネオ
ン，キセノンおよびアルゴンの４成分混合ガスを封入し
たガス放電型表示装置において、前記４成分混合ガスに
含まれるキセノンの混合比を１．５％から１０％とした
ことを特徴とするガス放電型表示装置。1. A phosphor partially applied to an inner surface of a discharge space side
Helium, neodymium as discharge gas in the discharge space
And a four-component gas mixture of xenon and argon
Gas discharge display device, the four-component mixed gas
A gas discharge type display device characterized in that the mixing ratio of xenon is set to 1.5% to 10% .
とネオンの混合比率を３：７から７：３とする請求項１
記載のガス放電型表示装置。2. Helium contained in the four-component mixed gas
2. The mixing ratio of neon and neon is from 3: 7 to 7: 3.
A gas discharge type display device as described in the above .
の混合比を５％から１０％とする請求項１または２記載
のガス放電型表示装置。3. Argon contained in said four-component mixed gas
The mixing ratio of 5% to 10%.
Discharge display device of the gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13667296A JP2930007B2 (en) | 1996-05-30 | 1996-05-30 | Gas discharge display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13667296A JP2930007B2 (en) | 1996-05-30 | 1996-05-30 | Gas discharge display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09320474A JPH09320474A (en) | 1997-12-12 |
| JP2930007B2 true JP2930007B2 (en) | 1999-08-03 |
Family
ID=15180786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13667296A Expired - Fee Related JP2930007B2 (en) | 1996-05-30 | 1996-05-30 | Gas discharge display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2930007B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999009578A1 (en) * | 1997-08-14 | 1999-02-25 | Matsushita Electric Industrial Co., Ltd. | Gas discharge panel and gas light-emitting device |
| JP4011746B2 (en) | 1998-08-26 | 2007-11-21 | 株式会社日立製作所 | Plasma display panel |
| JP4271902B2 (en) * | 2002-05-27 | 2009-06-03 | 株式会社日立製作所 | Plasma display panel and image display device using the same |
-
1996
- 1996-05-30 JP JP13667296A patent/JP2930007B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09320474A (en) | 1997-12-12 |
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