JPH07142826A - Printed board and connection wiring and picture display employing them - Google Patents

Printed board and connection wiring and picture display employing them

Info

Publication number
JPH07142826A
JPH07142826A JP28932693A JP28932693A JPH07142826A JP H07142826 A JPH07142826 A JP H07142826A JP 28932693 A JP28932693 A JP 28932693A JP 28932693 A JP28932693 A JP 28932693A JP H07142826 A JPH07142826 A JP H07142826A
Authority
JP
Japan
Prior art keywords
circuit board
printed circuit
voltage discharge
discharge
ray tube
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.)
Pending
Application number
JP28932693A
Other languages
Japanese (ja)
Inventor
Tsutomu Tsuritani
勤 釣谷
Hideaki Oki
英明 黄木
Seiji Watanuki
清司 綿貫
Hiroshi Kaneko
衛司 金子
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Image Information Systems Inc
Hitachi Ltd
Hitachi Advanced Digital Inc
Original Assignee
Hitachi Image Information Systems Inc
Hitachi Ltd
Hitachi Video and Information System Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Image Information Systems Inc, Hitachi Ltd, Hitachi Video and Information System Inc filed Critical Hitachi Image Information Systems Inc
Priority to JP28932693A priority Critical patent/JPH07142826A/en
Publication of JPH07142826A publication Critical patent/JPH07142826A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0254—High voltage adaptations; Electrical insulation details; Overvoltage or electrostatic discharge protection ; Arrangements for regulating voltages or for using plural voltages
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components

Landscapes

  • Structure Of Printed Boards (AREA)

Abstract

PURPOSE:To avoid the breakdown of a component due to a high voltage discharged from a capacitive load. CONSTITUTION:The pins (not shown) of a cathode-ray tube 1 are inserted into the sockets (not shown) of a printed board 2 to connect the printed board 2 with the cathode-ray tube 1 and a connection part 3 is formed. If a high voltage discharge to a focus electrode 4 is produced in the cathode-ray tube 1, the high voltage is discharged from the focus electrode 4 through an electrode 3a along a route indicated by arrow B'. A grounded lightning rod 7 is mounted on the printed board 2 on the discharge route or closer to the end part 3b of the electrode 3a which is a discharge source than the all the other components on the printed board 2. The high voltage is discharged to the lightning rod 7. Therefore, all the components on the printed board 2 are protected from the high voltage discharge.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、陰極線管などの容量性
負荷を有するプリント基板，接続線及びそれを用いる画
像表示装置に係り、特に、該容量性負荷の高電圧放電か
らの該プリント基板上の回路（部品）の保護に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board having a capacitive load such as a cathode ray tube, a connecting line and an image display device using the same, and more particularly to the printed circuit board from a high voltage discharge of the capacitive load. Regarding the protection of the above circuits (components).

【０００２】[0002]

【従来の技術】従来、陰極線管を備えた画像表示装置に
おいては、陰極線管内で希に高電圧放電が起るが、陰極
線管のフォ−カス部にかかる管内放電が生じたとき、こ
の陰極線管に取り付けられているプリント基板がこの高
電圧放電によって影響されないようにする手段が講じら
れているのが一般的である。2. Description of the Related Art Conventionally, in an image display device equipped with a cathode ray tube, a high voltage discharge rarely occurs in the cathode ray tube, but when the in-tube discharge on the focus portion of the cathode ray tube occurs, this cathode ray tube It is common practice to take measures to ensure that the printed circuit board mounted on the board is not affected by this high voltage discharge.

【０００３】図２はその一例を示す構成図であって、１
は陰極線管、２はプリント基板、３は接続部、３ａは電
極、３ｂは端部、４はフォーカス電極、５はアース電
極、６は回路などの被放電部品である。FIG. 2 is a block diagram showing an example of the above.
Is a cathode ray tube, 2 is a printed circuit board, 3 is a connecting part, 3a is an electrode, 3b is an end part, 4 is a focus electrode, 5 is a ground electrode, and 6 is a part to be discharged such as a circuit.

【０００４】同図において、プリント基板２の図示しな
いソケットに陰極線管１の図示しないピンを差し込む
と、プリント基板２と陰極線管１とが一体となり、プリ
ント基板２から陰極線管１の各電極への各種信号の供給
ができるようになる。これとともに、プリント基板２と
陰極線管１との間に接続部３が形成され、フォーカス電
極４からこの接続部３を介してプリント基板２に至る電
極３ａが形成される。この接続部３のプリント基板２側
では、電極３ａの端部３ｂと所定の幅ｄの間隙を挾んで
アース電極５が設けられている。In the figure, when a pin (not shown) of the cathode ray tube 1 is inserted into a socket (not shown) of the printed circuit board 2, the printed circuit board 2 and the cathode ray tube 1 are integrated, and the printed board 2 and each electrode of the cathode ray tube 1 are connected. It becomes possible to supply various signals. At the same time, a connecting portion 3 is formed between the printed board 2 and the cathode ray tube 1, and an electrode 3a extending from the focus electrode 4 to the printed board 2 through the connecting portion 3 is formed. On the printed circuit board 2 side of the connecting portion 3, a ground electrode 5 is provided with a gap of a predetermined width d from the end portion 3b of the electrode 3a.

【０００５】そこで、いま、陰極線管１内で偶々フォー
カス電極４への高電圧放電が発生したとすると、このフ
ォーカス電極４に高電圧が生ずるが、矢印Ａで示すよう
に、フォーカス電極４から接続部３の電極３ａ、幅ｄの
間隙、アース電極５を介してこの高電圧が放電され、プ
リント基板２の被放電部品６は何も影響されない。Therefore, if a high voltage discharge is accidentally generated in the focus electrode 4 in the cathode ray tube 1, a high voltage is generated in the focus electrode 4, but the focus electrode 4 is connected as indicated by an arrow A. This high voltage is discharged through the electrode 3a of the portion 3, the gap of the width d, and the ground electrode 5, and the discharged parts 6 of the printed circuit board 2 are not affected at all.

【０００６】このようにして、陰極線管１の管内放電に
対して、プリント基板２の保護が可能となる。In this way, the printed circuit board 2 can be protected against the discharge inside the cathode ray tube 1.

【０００７】[0007]

【発明が解決しようとする課題】しかしながら、このよ
うな陰極線管１の管内放電に対する防御手段を設けた場
合、フォーカス電極４に印加される定常の電圧も、その
印加電圧によっては、接続部３の電極３ａ、幅ｄの間
隙、アース電極５を介してリークしてしまうという問題
がある。However, in the case where such a protection means against the in-tube discharge of the cathode ray tube 1 is provided, the steady voltage applied to the focus electrode 4 also depends on the applied voltage, the connecting portion 3 There is a problem that leakage occurs through the electrode 3a, the gap of the width d, and the ground electrode 5.

【０００８】これを防止するためには、かかるリークが
生じないように、上記の間隙ｄの幅を広げたり、アース
電極を除いて上記間隙そのものを除いたりすることが考
えられるが、陰極線管１内に高電圧の放電が生じた場
合、接続部３の電極３ａから外部品に放電してしまう場
合もあり得る。In order to prevent this, it is conceivable to widen the gap d or to eliminate the gap itself except the ground electrode so that such a leak does not occur. When a high-voltage discharge is generated inside, there is a possibility that the electrode 3a of the connection part 3 is discharged to an external component.

【０００９】図３は上記の間隙そのものを取り除いた場
合を示すものであって、陰極線管１内に高電圧放電が発
生すると、矢印Ｂで示すように、フォーカス電極４が接
続部３の電極３ａを介してプリント基板２の被放電部品
６に放電し、この被放電部品６が破壊されてしまうこと
もあり得る。FIG. 3 shows a case where the above-mentioned gap itself is removed. When a high voltage discharge occurs in the cathode ray tube 1, as shown by an arrow B, the focus electrode 4 is connected to the electrode 3a of the connecting portion 3. There is a possibility that the part to be discharged 6 of the printed circuit board 2 is discharged via the electric field and the part to be discharged 6 is destroyed.

【００１０】これを防止するために、プリント基板２上
の矢印Ｂで示す放電経路中に非導電性障害物を設けるこ
とが考えられる。この方法によると、フォーカス電極に
印加される定常電圧のリークとプリント基板２の被放電
部品６への放電を防止することができるが、非導電性障
害物によってプリント基板２上の放電経路が変わるだけ
であって、他の部品へ放電がなされるようになってしま
い、放電による部品の破壊を防止するという問題を解決
するものではない。In order to prevent this, it is conceivable to provide a non-conductive obstacle in the discharge path indicated by arrow B on the printed circuit board 2. According to this method, it is possible to prevent the leakage of the steady voltage applied to the focus electrode and the discharge of the printed circuit board 2 to the discharged parts 6, but the discharge path on the printed circuit board 2 is changed by the non-conductive obstacle. However, this does not solve the problem of preventing the destruction of the component due to the discharge because the other component is discharged.

【００１１】本発明の目的は、かかる問題を解消し、容
量性負荷の高電圧放電による部品破壊を確実に防止する
ことができるようにしたプリント基板，接続線及びそれ
を用いる画像表示装置を提供することにある。An object of the present invention is to provide a printed circuit board, a connecting line, and an image display apparatus using the same, which solves the above problems and can surely prevent component destruction due to high-voltage discharge of a capacitive load. To do.

【００１２】[0012]

【課題を解決するための手段】上記目的を達成するため
に、本発明は、プリント基板上の放電経路部分にア−ス
接地された避雷針部分を設ける。To achieve the above object, the present invention provides a grounded lightning rod portion in the discharge path portion on a printed circuit board.

【００１３】また、本発明は、プリント基板上のどの部
品よりも放電源に近い位置にア−ス接地された避雷針部
分を設ける。Further, according to the present invention, a grounded lightning rod portion is provided at a position closer to the discharge power source than any component on the printed circuit board.

【００１４】[0014]

【作用】本発明は、容量性負荷の高電圧放電が外部部品
に放電されるのを阻止するのではなく、プリント基板上
の放電経路部分あるいはどの部品よりも放電源に近い位
置にア−ス接地された避雷針部分が設けられているた
め、全ての高電圧放電パワ−はこの避雷針に放電し、プ
リント基板上の部品への放電がなくなる。これにより、
回路破壊（部品破壊）が回避できる。The present invention does not prevent the high-voltage discharge of a capacitive load from being discharged to external components, but rather the discharge path portion on the printed circuit board or a position closer to the discharge power source than any component. Since the grounded lightning rod portion is provided, all the high-voltage discharge power discharges to this lightning rod, and there is no discharge to the parts on the printed circuit board. This allows
Circuit break (part break) can be avoided.

【００１５】[0015]

【実施例】以下、発明の実施例を図面を用いて説明す
る。図１は本発明によるプリント基板，接続線及びそれ
を用いる画像表示装置の一実施例を示す構成図であっ
て、７は避雷針であり、前出図面に対応する部分には同
一符号をつけて重複する説明を省略する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a printed circuit board, a connecting line, and an image display device using the same according to the present invention. Reference numeral 7 is a lightning rod, and parts corresponding to those in the above drawings are designated by the same reference numerals. A duplicate description will be omitted.

【００１６】図１において、いま、陰極線管１に高電圧
放電が発生したときの放電経路が矢印Ｂ’に示すように
なるとすると、プリント基板２上のこの放電経路Ｂ’に
アース接地された避雷針７を実装する。このため、陰極
線管１に高電圧放電が発生したときには、接続部３にお
ける電極３ａの端部３ｂから避雷針７に放電することに
なり、被放電部品６はこの放電から保護されることにな
る。In FIG. 1, assuming that the discharge path when a high voltage discharge occurs in the cathode ray tube 1 becomes as shown by an arrow B ', a lightning rod grounded to the discharge path B'on the printed circuit board 2 is grounded. Implement 7. Therefore, when a high voltage discharge is generated in the cathode ray tube 1, the lightning rod 7 is discharged from the end portion 3b of the electrode 3a in the connection portion 3, and the discharged component 6 is protected from this discharge.

【００１７】この場合、電極３ａの端部３ｂ側に所定幅
の間隙をもってアース電極を設ける必要がないため、フ
ォーカス電極４に印加される所定の電圧がリークされる
こともない。In this case, since it is not necessary to provide a ground electrode on the end 3b side of the electrode 3a with a gap of a predetermined width, the predetermined voltage applied to the focus electrode 4 will not leak.

【００１８】また、この避雷針７をプリント基板２に実
装された全ての部品、特に、全ての被放電部品よりも電
極３ａの端部３ｂなどの放電しやすい部分（高電圧放電
源）に近い位置に実装するようにしてもよい。これによ
り、プリント基板２に実装された全ての部品が高電圧放
電から保護されることになる。Further, this lightning rod 7 is located closer to all parts mounted on the printed circuit board 2, in particular, a portion (high-voltage discharge power source) such as the end 3b of the electrode 3a which is more easily discharged than all the parts to be discharged. May be implemented in. As a result, all the components mounted on the printed board 2 are protected from high voltage discharge.

【００１９】この避雷針７としてはメッキ線程度のもの
でもよく、プリント基板２は避雷針７を設けることによ
って格別高価になるものでもない。The lightning rod 7 may be a plated wire, and the printed circuit board 2 is not particularly expensive due to the provision of the lightning rod 7.

【００２０】[0020]

【発明の効果】以上説明したように、本発明によると、
容量性負荷の高電圧放電が発生したとしても、プリント
基板では避雷針に放電することになり、プリント基板上
に実装された被放電部品をこの高電圧放電から充分保護
することができるし、避雷針も非常に簡単なものです
み、高電圧放電用の間隙あるいは非導電性障害物などを
設ける必要がないため、プリント基板２や画像表示装置
が格別高価になるものでもない。As described above, according to the present invention,
Even if a high-voltage discharge of a capacitive load occurs, it will be discharged to the lightning rod on the printed circuit board, and the discharged parts mounted on the printed circuit board can be sufficiently protected from this high-voltage discharge, and the lightning rod also Since it is very simple, it is not necessary to provide a gap for high-voltage discharge or a non-conductive obstacle, so that the printed circuit board 2 and the image display device are not particularly expensive.

【００２１】また、該容量性負荷を陰極線管とした場
合、高電圧放電用の間隙を設ける必要がないため、該陰
極線管内の電極に印加される定常の電圧がリークするこ
ともない。Further, when the capacitive load is a cathode ray tube, it is not necessary to provide a gap for high voltage discharge, so that the steady voltage applied to the electrodes in the cathode ray tube does not leak.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明によるプリント基板，接続線及びそれを
用いる画像表示装置の一実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of a printed circuit board, a connection line, and an image display device using the same according to the present invention.

【図２】従来のプリント基板，接続線及びそれを用いる
画像表示装置の一例を示す構成図である。FIG. 2 is a configuration diagram showing an example of a conventional printed circuit board, a connection line, and an image display device using the same.

【図３】従来のプリント基板，接続線及びそれを用いる
画像表示装置の他の例を示す構成図である。FIG. 3 is a configuration diagram showing another example of a conventional printed circuit board, a connection line, and an image display device using the same.

【符号の説明】[Explanation of symbols]

１ 陰極線管 ２ プリント基板 ３ 接続部 ３ａ 電極 ３ｂ 端部 ４ フォ−カス電極 ５ ア−ス電極 ６ 被放電部品 ７ 避雷針 Ａ，Ｂ，Ｂ’ 高電圧放電経路 DESCRIPTION OF SYMBOLS 1 Cathode ray tube 2 Printed circuit board 3 Connection part 3a Electrode 3b End part 4 Focus electrode 5 Ground electrode 6 Discharged component 7 Lightning rod A, B, B'High voltage discharge path

───────────────────────────────────────────────────── フロントページの続き (72)発明者 綿貫 清司 神奈川県横浜市戸塚区吉田町292番地 株 式会社日立製作所ＡＶ機器事業部内 (72)発明者 金子 衛司 神奈川県横浜市戸塚区吉田町292番地 株 式会社日立製作所ＡＶ機器事業部内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoji Watanuki 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa AV equipment division, Hitachi, Ltd. (72) Inventor Eiji Kaneko 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Incorporated company Hitachi Ltd. AV equipment division

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 容量性負荷の高電圧放電があり得、特
に、前記高電圧放電によって破壊に及ぶ部品が配置され
るプリント基板において、 前記放電の経路上にア−ス接地された避雷針を配置した
ことを特徴とするプリント基板。1. A high voltage discharge of a capacitive load is possible, and in particular, in a printed circuit board on which parts that are damaged by the high voltage discharge are arranged, a grounded lightning rod is arranged on the path of the discharge. A printed circuit board characterized in that 【請求項２】 容量性負荷の高電圧放電があり得、特
に、前記高電圧放電によって破壊に及ぶ部品が配置され
るプリント基板において、 どの被放電部分よりも高電圧放電源に近い位置に前記避
雷針を配置したことを特徴とするプリント基板。2. A high-voltage discharge of a capacitive load is possible, and in particular, in a printed circuit board on which parts that are destroyed by the high-voltage discharge are arranged, the part closer to the high-voltage discharge power source than any part to be discharged. A printed circuit board with a lightning rod. 【請求項３】 画像表示手段として陰極線管を使用し、
請求項１または２に記載のプリント基板を内蔵したこと
を特徴とする画像表示装置。3. A cathode ray tube is used as an image display means,
An image display device comprising the printed circuit board according to claim 1 or 2. 【請求項４】 ア−ス〜ア−スを接続する接続線、或い
は、接続線のどちらか一方以上がア−ス接地されている
接続線において、 放電経路上にア−ス接地された避雷針、或いは、高電圧
放電源に対し、どの被放電部分よりも高電圧放電源に近
い位置にア−ス接地された避雷針の役割をも兼ねること
を特徴とする接続線。4. A lightning rod grounded on the discharge path in an earth-to-earth connecting wire or a connecting wire in which one or more of the connecting wires is earthed to ground. Alternatively, the connection line is also characterized by serving as a lightning rod, which is grounded at a position closer to the high-voltage discharge power source than any part to be discharged, with respect to the high-voltage discharge power source. 【請求項５】 容量性負荷の高電圧放電があり得、特
に、前記高電圧放電によって破壊に及ぶ部品が配置され
るプリント基板において、 請求項４に記載の接続線を有することを特徴とするプリ
ント基板。5. A high-voltage discharge of a capacitive load is possible, and in particular in a printed circuit board on which parts that are destroyed by the high-voltage discharge are arranged, characterized in that they have the connecting line according to claim 4. Printed board. 【請求項６】 画像表示手段として陰極線管を使用し、
請求項５に記載のプリント基板を内蔵したことを特徴と
する画像表示装置。6. A cathode ray tube is used as an image display means,
An image display device comprising the printed circuit board according to claim 5.
JP28932693A 1993-11-18 1993-11-18 Printed board and connection wiring and picture display employing them Pending JPH07142826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28932693A JPH07142826A (en) 1993-11-18 1993-11-18 Printed board and connection wiring and picture display employing them

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28932693A JPH07142826A (en) 1993-11-18 1993-11-18 Printed board and connection wiring and picture display employing them

Publications (1)

Publication Number Publication Date
JPH07142826A true JPH07142826A (en) 1995-06-02

Family

ID=17741750

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28932693A Pending JPH07142826A (en) 1993-11-18 1993-11-18 Printed board and connection wiring and picture display employing them

Country Status (1)

Country Link
JP (1) JPH07142826A (en)

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