JPS6376232A - Discharge panel - Google Patents

Abstract

PURPOSE:To reduce the noise made from a discharge panel to the outside without losing the visibility of the discharge panel, by installing a transparent and low resistance conductive membrane on almost all the surface of a substrate at the outer side of an electrode device of the discharge panel, and grounding the conductive membrane. CONSTITUTION:To a substrate 11 of the first electrode device 10, a transparent conductive membrane 40 is spread and furnished. As the transparent conductive membrane 40, an indium tin oxide InSnOx, that is so-called ITO, is used. The ITO membrane 40 is grounded. Thereby, the noise to the upper side U is grounded and not released or little released to the outside Zx. On the other hand, since the ITO membrane 40 is transparent, it gives no influence to the visibility of the generation of the gas discharge. The substrate 21 side of the second electrode device 20 may also be coated with the ITO membrane. When it is coated, the noise to the down side D is grounded in the same manner and not released to the outside. However, it is generally allowable that the discharge panel can be visible only from one direction. Therefore, the second electrode device 20 side may be covered with a metallic shield plate usually.

Description

【発明の詳細な説明】 〔概要〕 プラズマディスプレイ　（Ｆ　Ｄ　Ｐ）等の放電パネル
内の電極に印加される高周波駆動信号に応じて発生する
ガス分離放電に伴う放射ノイズを、放電パネルの一方の
面にシールド用の透明導電性膜を被着形成させ、上記放
射ノイズの外部放射を低減させる放電パネルである。[Detailed Description of the Invention] [Summary] Radiation noise accompanying gas separation discharge generated in response to a high-frequency drive signal applied to an electrode in a discharge panel such as a plasma display (FDP) is removed from one side of the discharge panel. This discharge panel has a transparent conductive film for shielding formed on its surface to reduce external radiation of the radiation noise.

〔産業上の利用分野〕[Industrial application field]

本発明は放電パネルに関するものであり、より特定的に
は、ノイズ低減対策を講じた放電パネルに関する。The present invention relates to a discharge panel, and more particularly to a discharge panel that takes measures to reduce noise.

〔従来技術〕[Prior art]

一般に電子装置は使用する電圧の低下、高速化に伴い雑
音に対して誤動作し易い。そこで電子装置側において外
部雑音に対する対ノイズ対策を採ると共に、雑音発生源
を隔離ないし雑音発生源からの放出雑音を低減させるこ
とが採られている。In general, electronic devices tend to malfunction due to noise as the voltage used decreases and speed increases. Therefore, countermeasures against external noise are taken on the electronic device side, and measures are taken to isolate the noise source or reduce the noise emitted from the noise source.

プラズマディスプレイ（Ｆ　Ｄ　Ｐ）等ガス放電パネル
を用いた放電表示装置においても上記２種の雑音対策が
必要となる。すなわち放電表示制御回路系は電子化され
ているので外部雑音対策が必要となると共に、放電パネ
ル自体が雑音源となるので放出雑音を低減させる必要が
生じる。前者については一般の雑音対策が適用されるの
で本発明の対象ではない、従って本発明においては後者
の放電パネルからの放出雑音の低減が主題である。The above two types of noise countermeasures are also required in a discharge display device using a gas discharge panel such as a plasma display (FDP). That is, since the discharge display control circuit system is electronic, it is necessary to take measures against external noise, and since the discharge panel itself becomes a noise source, it is necessary to reduce emission noise. The former is not a subject of the present invention because general noise countermeasures are applied.Therefore, the subject of the present invention is to reduce the latter noise emitted from the discharge panel.

従来のガス放電パネルの例を第２図に示す、ガス放電パ
ネルは第１および第２の電極手段１０゜２０が所定の間
隔ｄ隔てて対向し、その間隔内に放電性ガス３０が封入
されている。第２の電極手段２０はガラス基板２１面上
に複数の電極２２゜〜２２□。が平行に形成され、その
上を絶縁膜２３で被っている。第１の電極手段１０も、
断面Ｚ−Ｚ′においては第２の電極手段２０と同じ構成
となり、図においては電極の１つ１２．のみ示している
。第１の電極手段と第２の電極手段のそれぞれの電極１
２．２２とは直交し、交叉点間が１ドツト表示分の空間
（絵素）を規定する。例えば電極１２．と電極２２．と
の間に放電に充分な電圧が印加されると、その交叉点に
おける放電性ガス３０が放電発光する。An example of a conventional gas discharge panel is shown in FIG. 2. In the gas discharge panel, first and second electrode means 10.degree. 20 face each other at a predetermined distance d, and a discharge gas 30 is sealed within the distance. ing. The second electrode means 20 has a plurality of electrodes 22° to 22□ on the surface of the glass substrate 21. are formed in parallel and covered with an insulating film 23. The first electrode means 10 also includes:
In the cross section Z-Z', it has the same configuration as the second electrode means 20, and in the figure one of the electrodes 12. Only shown. Each electrode 1 of the first electrode means and the second electrode means
2.22 is orthogonal to each other, and the space between the intersection points defines a space (picture element) corresponding to one dot display. For example, electrode 12. and electrode 22. When a voltage sufficient for discharge is applied between the two, the dischargeable gas 30 at the intersection emits discharge light.

第１の電極１２と第２の電極２２とには、ドライバー回
路（図示せず）を介して９０Ｖ程度の電圧が印加される
。この駆動電圧はドライバー回路内の数＋ＭＨ２の原振
にもとづき、数十ＫＨｚのパルス電圧として印加される
。従って、かかる比較的高周波且つ高電圧の信号が印加
されることによる電磁気雑音が発生し得る。この電磁気
雑音は、静電じゃへい、電磁しゃへい等により低減させ
得ることが知られている。A voltage of about 90V is applied to the first electrode 12 and the second electrode 22 via a driver circuit (not shown). This drive voltage is applied as a pulse voltage of several tens of KHz based on the original oscillation of several + MH2 in the driver circuit. Therefore, electromagnetic noise may occur due to the application of such relatively high frequency and high voltage signals. It is known that this electromagnetic noise can be reduced by electrostatic shielding, electromagnetic shielding, etc.

（発明が解決しようとする問題点〕 放電パネルからは上記電磁気雑音の外、ガス放電に伴う
放射ノイズが知られており、この放射ノイズが基板１１
．２１を透過して外部に放射される。上記電磁気雑音の
一部も基板１１．２１を介して放射されることがある。(Problems to be Solved by the Invention) In addition to the electromagnetic noise mentioned above, radiation noise accompanying gas discharge is known from the discharge panel.
．． 21 and is radiated to the outside. Part of said electromagnetic noise may also be radiated through the substrate 11.21.

このような放射ノイズを外部に放出させないようにする
ため、例えば従来の如く単に放電パネルを接地された筐
体内に閉じ込めるという手段はとれない、すなわち、放
電パネルの少なくとも一方は視認可能な状態になってい
ないからである。In order to prevent such radiated noise from being emitted to the outside, for example, it is not possible to simply confine the discharge panel in a grounded enclosure as in the past; in other words, at least one of the discharge panels must be visible. This is because they are not.

従って放電パネルの視認性を損うことなく上記雑音を放
電パネルの外部に放出させないようにすることが望まれ
ている。Therefore, it is desired to prevent the above noise from being emitted to the outside of the discharge panel without impairing the visibility of the discharge panel.

〔問題を解決するための手段および作用〕放電パネルの
電極手段の外部に面する基板に透明かつ低抵抗の導電性
膜をほぼ全面に装着させる。[Means and actions for solving the problem] A transparent, low-resistance conductive film is attached to almost the entire surface of the substrate facing the outside of the electrode means of the discharge panel.

導電性膜を接地することにより、上記雑音は著しく低減
される。一方透明膜ゆえ視認性は損なわれない。By grounding the conductive membrane, the above noise is significantly reduced. On the other hand, the transparent film does not impair visibility.

他方の電極手段の外部に面する基板側は上記透明導電性
膜又は通常の金属シールド部材を装着させればよい。The substrate side facing the outside of the other electrode means may be provided with the above-mentioned transparent conductive film or an ordinary metal shield member.

〔実施例〕〔Example〕

本発明の一実施例について第１図を参照して述べる。 An embodiment of the present invention will be described with reference to FIG.

第１図に図示の放電パネルは第２図に図示の放電パネル
に対し、第１の電極手段１０の基板１１に透明導電性膜
４０を被着形成させたものである。The discharge panel shown in FIG. 1 is different from the discharge panel shown in FIG. 2 in that a transparent conductive film 40 is formed on the substrate 11 of the first electrode means 10.

透明導電性膜４０としては、インジウム・錫酸化物１Ｈ
５ｎＯｘｓいわゆるＩＴＯ（Ｉｎｄｉｕｍ４ｉｎ　　・
０ｘｉｄｅ）が用いられる。　ＩＴＯ膜４０は接地され
る。これにより図中上方Ｕに向う雑音は接地され、外部
Ｚｘには放出されないか、掻く僅かである。一方、ＩＴ
Ｏ膜４０は透明であるから、ガス放電発光の視認性につ
いては影響を及ぼさない。The transparent conductive film 40 is made of indium-tin oxide 1H.
5nOxs so-called ITO (Indium4in・
Oxide) is used. The ITO film 40 is grounded. As a result, noise directed upward U in the figure is grounded and is not emitted to the outside Zx, or is only slightly emitted. On the other hand, IT
Since the O film 40 is transparent, it does not affect the visibility of gas discharge light emission.

第２の電極手段２００基板２１側にも上述のＩＴＯ膜を
被着させることができる。これにより図中下方りに向う
雑音が上記同様接地され外部には放出されない、但し、
一般に放電パネルは一方向から視認できればよく、第２
電極手段２０側は通常の金属シールド板を包囲すること
でもよい。The above-described ITO film can also be deposited on the substrate 21 side of the second electrode means 200. As a result, the noise directed downward in the figure is grounded as above and is not emitted to the outside. However,
Generally, the discharge panel only needs to be visible from one direction;
The electrode means 20 side may be surrounded by a normal metal shield plate.

シールドの面からはＩＴＯ膜４０は低抵抗であることが
望ましく。そのためには膜厚を大きくすることが望まし
い。しかしながら膜厚を大きくすると、価格的に高価に
なり視認性が低下する傾向を有するので、発生雑音に応
じて適切な膜厚とすることが望ましい。From the standpoint of shielding, it is desirable that the ITO film 40 has low resistance. For this purpose, it is desirable to increase the film thickness. However, increasing the film thickness tends to increase the cost and reduce visibility, so it is desirable to set the film thickness appropriately depending on the generated noise.

第１図実施例においてはＩＴＯ膜４０を基板１１に被着
させて放電パネルと一体構造にした場合について示した
が、別途製造されたＩＴＯ膜４０を基板１０に回着させ
てもよく、又は放電パネル取付後、基板１０の全面を覆
うように装着させてもよい。ＩＴＯ膜４０は接地するこ
とを原則とする。In the embodiment shown in FIG. 1, a case is shown in which the ITO film 40 is applied to the substrate 11 to form an integral structure with the discharge panel, but a separately manufactured ITO film 40 may be attached to the substrate 10, or After the discharge panel is attached, it may be attached so as to cover the entire surface of the board 10. In principle, the ITO film 40 is grounded.

〔発明の効果〕〔Effect of the invention〕

以上述べたように本発明によれば、放電パネルの視認性
を損うことなく放電パネルから外部に放出する雑音を低
減させることができる。As described above, according to the present invention, noise emitted to the outside from the discharge panel can be reduced without impairing the visibility of the discharge panel.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例の放電パネルの断面図、 第２図は従来の放電パネルの断面図、である。 （符号の説明） １０・・・第１電極手段、　１１・・・基板、１２・・
・第１電極、　　　１３・・・絶縁保護膜、２０・・・
第２電極手段、　２１・・・基板、２２・・・第２電極
、　　　２３・・・絶縁保護膜、３０・・・放電性ガス
、　　４０・・・透明導電性膜。FIG. 1 is a sectional view of a discharge panel according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional discharge panel. (Explanation of symbols) 10... First electrode means, 11... Substrate, 12...
・First electrode, 13... Insulating protective film, 20...
Second electrode means, 21... Substrate, 22... Second electrode, 23... Insulating protective film, 30... Dischargeable gas, 40... Transparent conductive film.

Claims (1)

【特許請求の範囲】 １、所定の間隔を保って対向的に配設された第１および
第２の電極手段（１０、２０）であって、それぞれ平行
に配設された複数の電極（１２、２２）が基板（１１、
２１）上に形成されて成り且つ一方電極手段の電極が他
方の電極手段の電極と交叉するよう配設され、前記第１
および第２の所定の間隔内に封入された放電性ガス（３
０）が、第１および第２の電極手段のそれぞれの電極に
印加された高周波信号に応答し対応する交叉点において
放電発光するように形成された放電パネルにおいて、 少なくとも前記電極手段の一方の（１０）の放電パネル
の外方面に、前記高周波信号印加に伴う雑音しゃへい用
の透明導電性膜（４０）を装着させて或ることを特徴と
する、放電パネル。[Claims] 1. First and second electrode means (10, 20) arranged oppositely with a predetermined interval, each comprising a plurality of electrodes (12, 20) arranged in parallel. , 22) is the substrate (11,
21) formed on the first electrode means and disposed so that the electrodes of one electrode means intersect with the electrodes of the other electrode means;
and a discharge gas (3
0) is formed to emit discharge light at a corresponding intersection point in response to a high frequency signal applied to each electrode of the first and second electrode means, wherein at least one of the electrode means ( 10) A discharge panel characterized in that a transparent conductive film (40) for shielding noise accompanying the application of the high frequency signal is attached to the outer surface of the discharge panel.