JPH03289031A - Plate-like cathode-ray tube - Google Patents

Plate-like cathode-ray tube

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Publication number
JPH03289031A
JPH03289031A JP8821190A JP8821190A JPH03289031A JP H03289031 A JPH03289031 A JP H03289031A JP 8821190 A JP8821190 A JP 8821190A JP 8821190 A JP8821190 A JP 8821190A JP H03289031 A JPH03289031 A JP H03289031A
Authority
JP
Japan
Prior art keywords
fluorescent surface
ray tube
resistance member
phosphor surface
cathode ray
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
JP8821190A
Other languages
Japanese (ja)
Inventor
Fumio Noda
文雄 野田
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 Ltd
Original Assignee
Hitachi Ltd
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 Ltd filed Critical Hitachi Ltd
Priority to JP8821190A priority Critical patent/JPH03289031A/en
Publication of JPH03289031A publication Critical patent/JPH03289031A/en
Pending legal-status Critical Current

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  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

PURPOSE:To prevent creeping discharge of a container inner wall for impressing sufficiently high voltage on the phosphor surface by coating a region between a supporting means of an inner electrode provided on the inner wall of a vacuum container and the phosphor surface. CONSTITUTION:A phosphor surface 2 is formed at least on a part of the inner face of a vacuum container 1 while providing a region coated with a resistance member 3 so as to fringing the peripheral part of the phosphor surface on the inner wall of the vacuum contain er 1. Especially, in order to prevent creeping discharge between a supporting means 4 of an inner electrode 7 and the phosphor surface 2, the inner wall exposed part between both is coated with a resistance body 3. The inner peripheral part of the region coated with the resistance member 3 is in contact with the phosphor surface 2, while the outer peripheral part is in contact with the supporting means 4 of the inner electrode 7, so that, when high voltage is impressed on the phosphor surface 2 and low voltage is impressed on the supporting means 4 respectively, a constant minute current flows through the resistance member 3. Thereby, creeping discharge between the phosphor surface 2 and the inner electrode 7 or its supporting means 4 is prevented thus improving a dielectric characteristic.

Description

【発明の詳細な説明】[Detailed description of the invention]

【産業上の利用分野1 本発明は、カラーテレビジョン受像機、計算機端末用デ
イスプレィ等のカラー画像表示装置として使用する平板
状陰極線管に関するものである。 【従来の技術】 従来の平板状陰極線管には1例えば特開昭63−193
441号公報に記載されたものがある。この従来例につ
いて、第3図に示した斜視図を用いて説明する。 この従来例は、前面パネル11と背面パネル12とを封
着した平板状の真空容器と複数の電極とで構成されてい
る。前面パネル11の内面には、3原色(赤緑青)の螢
光体を垂直方向にストライプ状に塗布した螢光面2が形
成されている。容器内の下端には陰極支持体74と制御
電極72.73が配置され、水平方向に等間隔で並んだ
複数の電子ビームIOを螢光面2に対して平行に射出す
る。これらの電子ビーム10は、背面パネル12の内面
に配列された複数の垂直偏向板71によって螢光面2に
向けて偏向され、遮蔽電極75の開口をそれぞれ通過す
る。その後、個々の電子ビーム10は、対向する2枚の
水平偏向板76によって水平方向に微小偏向され、螢光
面2を走査する。 第3図には明示していないが、この従来例では、遮蔽電
極75、水平偏向板76等の内部電極は、所定のフレー
ムに固定されている。このフレームは、真空容器の内壁
に設けたピンにバネを介して取り付けられ、内部電極を
螢光面2に対向して支持するような構造になっている。
INDUSTRIAL APPLICATION FIELD 1 The present invention relates to a flat cathode ray tube used as a color image display device for color television receivers, displays for computer terminals, and the like. [Prior Art] Conventional flat cathode ray tubes include 1, for example, JP-A-63-193
There is one described in Publication No. 441. This conventional example will be explained using the perspective view shown in FIG. This conventional example is composed of a flat vacuum container in which a front panel 11 and a back panel 12 are sealed together, and a plurality of electrodes. On the inner surface of the front panel 11, a fluorescent surface 2 is formed in which phosphors of three primary colors (red, green, and blue) are applied in vertical stripes. A cathode support 74 and control electrodes 72 and 73 are arranged at the lower end of the container, and emit a plurality of electron beams IO arranged at equal intervals in the horizontal direction in parallel to the fluorescent surface 2. These electron beams 10 are deflected toward the fluorescent surface 2 by a plurality of vertical deflection plates 71 arranged on the inner surface of the rear panel 12, and pass through the openings of the shielding electrodes 75, respectively. Thereafter, each electron beam 10 is slightly deflected in the horizontal direction by two opposing horizontal deflection plates 76, and scans the fluorescent surface 2. Although not clearly shown in FIG. 3, in this conventional example, internal electrodes such as the shielding electrode 75 and the horizontal deflection plate 76 are fixed to a predetermined frame. This frame is attached via a spring to a pin provided on the inner wall of the vacuum container, and has a structure in which the internal electrode is supported facing the fluorescent surface 2.

【発明が解決しようとする課題】[Problem to be solved by the invention]

上述の従来例では、高電圧を印加する螢光面と低電圧を
印加する内部電極との耐電圧特性を良好に保つことが大
きな課題である。特に、内部電極を支持するピンと螢光
面との距離が短いので、容器内壁の沿面放電が起こり易
く、螢光面の電圧を十分高くすることができない。 本発明の目的は、このような容器内壁の沿面放電を防止
して、螢光面に十分高い電圧を印加することができる平
板状陰極線管を提供することにある。
In the conventional example described above, a major problem is to maintain good withstand voltage characteristics between the fluorescent surface to which a high voltage is applied and the internal electrodes to which a low voltage is applied. In particular, since the distance between the pins supporting the internal electrodes and the fluorescent surface is short, creeping discharge on the inner wall of the container is likely to occur, and the voltage on the fluorescent surface cannot be made sufficiently high. An object of the present invention is to provide a flat cathode ray tube that can prevent such creeping discharge on the inner wall of the container and apply a sufficiently high voltage to the fluorescent surface.

【課題を解決するための手段] 上記目的を達成するため、本発明の平板状陰極線管は、真空容器の内面の少なくとも一部に螢光面を形成し、この螢光面の外縁部を縁取るように抵抗部材で被覆した領域を真空容器の内壁に設けたものである。特に、内部電極の支持手段と螢光面との間の沿面放電を防止するため、この両者間の内壁露出部を抵抗部材で被覆する。 【作用】[Means to solve problems] In order to achieve the above object, the flat cathode ray tube of the present invention has a fluorescent surface formed on at least a part of the inner surface of the vacuum vessel, and an area covered with a resistance member so as to frame the outer edge of the fluorescent surface. is provided on the inner wall of the vacuum container. In particular, in order to prevent creeping discharge between the internal electrode support means and the fluorescent surface, the inner wall exposed portion between the two is covered with a resistive member. [Effect]

抵抗部材で被覆した領域の内縁部は螢光面と接し、外縁
部は内部電極の支持手段と接しているので、螢光面に高
電圧を、支持手段に低電圧をそれぞれ印加すると、抵抗
部材を介して定常的な微小電流が流れる。これにより、
螢光面と内部電極あるいはその支持手段との間の前記沿
面放電が防止され、耐電圧特性が良好になる。 ・
The inner edge of the region covered with the resistance member is in contact with the fluorescent surface, and the outer edge is in contact with the support means of the internal electrode, so when a high voltage is applied to the fluorescent surface and a low voltage is applied to the support means, the resistance member A steady, minute current flows through the This results in
The creeping discharge between the fluorescent surface and the internal electrode or its support means is prevented, and the withstand voltage characteristics are improved.・

【実施例】【Example】

以下1本発明の実施例について第1図と第2図を用いて
説明する。 第1図は、本発明の一実施例である平板状陰極線管の概
略構成を示した断面図である。平板状の真空容器1は、
ガラス製の前面パネル11と背面パネル12をフリット
ガラスなどの接着剤で封着したものである。前面パネル
11の内面には、赤緑青の3M色螢光体をストライプ状
に塗布した螢光面2を形成する。また、前面パネル11
の側壁には内部構造物を固定するピン4を設けておく。 この螢光面2を縁取るようにして、螢光面2とピン4と
の間の内壁をガラス抵抗体などの抵抗部材3で被覆する
。一方、背面パネル12の内面には、複数の垂直偏向板
71を螢光面2と平行に所定の間隔で配列する。 この実施例の内部構造物は、フレーム6に水平偏向電極
や電子銃などの内部電極7を固定したものである。フレ
ーム6には所定のバネ5を設けておき、このバネ5を介
してフレーム6をピン4に取り付ける。内部電極7や垂
直偏向板71に電圧を印加するためのリード端子8は、
前面パネル11と背面パネル12との封着部から外部へ
引き呂す。特に本実施例においては、バネ5にも外部か
ら電圧を加えられるようにしておき、バネ5を通してピ
ン4に所定の電圧を加える。 第1図の実施例の電極構造とその動作は、第3図の従来
例とほぼ同様である。ただし、第1図の実施例は、真空
容器1の内壁の沿面放電を防止するため、次のような機
能を備えている。すなわち、抵抗部材3の一端は螢光面
2と接し、他端はピン4と接しているので、螢光面2に
高電圧を、ピン4に低電圧にそれぞれ加えると、抵抗部
材3に定常電流が流れる。これにより、真空容器1の内
壁が鱒出していた従来例に比べて、螢光面2とピン4と
の間の耐電圧特性を向上させることができる。 抵抗部材3の材質や厚さ等の形状を勘案すれば、抵抗部
材3の抵抗値を十分高く設定できるので、消費電力や安
定度はほとんど問題ない。また、抵抗部材3による電圧
降下を利用して、螢光面2に加えた電圧とピン4に加え
た電圧との間の任意の大きさの電圧を取り出すことがで
きる。この実施例では、コンタクトスプリング9を介し
て所定の電圧を引き出し、内部電極7の一部に印加する
ようになっている。 なお、本実施例の抵抗部材3には、マンガン、鉄、銅な
どの遷移金属の酸化物をシリカガラスに混合したガラス
抵抗体を用いている。しかし、これは−例であって、こ
の材質に限ることなく他の材質を用いても同様の効果が
得られることは言うまでもない。 第1図に示した本発明の平板状陰極線管を製造するには
、例えば次のような方法がある。内壁にピン4を設けた
前面パネル11に螢光面2を形成した後、抵抗部材3を
塗布・乾燥させて適当な温度で焼成する。フレーム6に
は内部電極7などの構造物をあらかじめ組み立てておく
。出来上がった前面パネル11にフレーム6を精度よく
取り付け、この前面パネル11と背面パネル12とを封
着する。 以上、第1図には本発明の一実施例を示したが。 内部構造物を固定するピン4あるいは同様の支持手段は
、背面パネル12にあってもよい。その場合、抵抗部材
3で被覆した領域は、前面パネル11から背面パネル1
2に渡って延在してもよい。また、抵抗部材3は1ケ所
に限らず、複数箇所に分割して被覆することも可能であ
る。例えば、特定の形状パターンで抵抗部材3を被覆す
れば、抵抗値をより正確に設定し、螢光面2に印加した
電圧を所望の大きさに減圧することが容易になる。 第2図は、本発明の他の実施例である平板状陰極線管の
概略構成を示した断面図である。この実施例では、ガラ
ス製の前面パネル11と背面プレート13とを封着して
平板状の真空容器1を形成する。 第1図の実施例と同様に、前面パネル11の内壁には螢
光面2と電極固定用のピン4を設ける。この螢光面2を
縁取るようにして、螢光面2とピン4との間の内壁をガ
ラス抵抗体などの抵抗部材3で被覆する。内部電極7は
フレーム6に固定し、バネ5を介してピン4に取り付け
る。背面プレート13にはあらかじめリード端子81を
配設しておき、封着時に内部電極7と接続する。 第2図に示した実施例の利点は、真空容器1の背面をプ
レート状にすることによって、平板状陰極線管の外寸を
薄くできることである。また、背面プレート13にリー
ド端子81を配設することにより、封着時の損傷を防止
し、信頼性を向上させることができる。これにより、リ
ード端子81を増設して内部電極7に所望の電圧を印加
できるようになるので、第1図の実施例のように、抵抗
部材3で減圧した電圧を特に利用しなくてもよい。 以上、本発明の実施例について説明したが、本発明の本
質は、内部電極の支持手段と螢光面との間の沿面放電を
防止するため、抵抗部材を被覆することにより真空容器
内壁の電気的特性を改善することにある。したがって、
上記本質を損なわなければ、この抵抗部材に電流が流れ
ないように構成することも可能である。また、容器内壁
に土手状の凸部を形成するように抵抗部材を被覆すれば
。 内部電極の支持手段と螢光面との間の沿面距離が実質的
に長くなるので、放電防止効果をより高めることができ
ることは言うまでもない。 [発明の効果] 本発明の平板状陰極線管においては、真空容器の内壁に
設けた内部電極の支持手段と螢光面との間の領域を抵抗
部材で被覆することにより、容器内壁の沿面放電を防止
することができる。その結果、高電圧を印加する螢光面
と低電圧を印加する内部電極との耐電圧特性を良好に保
ち、螢光面に十分高い電圧を印加することが可能になる
という効果が得られる。
An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a sectional view showing the schematic structure of a flat cathode ray tube which is an embodiment of the present invention. The flat vacuum container 1 is
A front panel 11 and a back panel 12 made of glass are sealed together with an adhesive such as frit glass. On the inner surface of the front panel 11, a fluorescent surface 2 is formed by applying red, green and blue 3M color phosphors in stripes. In addition, the front panel 11
A pin 4 for fixing the internal structure is provided on the side wall of the housing. The inner wall between the fluorescent surface 2 and the pin 4 is covered with a resistance member 3 such as a glass resistor so as to frame the fluorescent surface 2. On the other hand, on the inner surface of the back panel 12, a plurality of vertical deflection plates 71 are arranged parallel to the fluorescent surface 2 at predetermined intervals. The internal structure of this embodiment is such that an internal electrode 7 such as a horizontal deflection electrode or an electron gun is fixed to a frame 6. A predetermined spring 5 is provided on the frame 6, and the frame 6 is attached to the pin 4 via this spring 5. The lead terminal 8 for applying voltage to the internal electrode 7 and the vertical deflection plate 71 is
It is drawn to the outside from the sealed portion between the front panel 11 and the back panel 12. Particularly in this embodiment, a voltage can also be applied to the spring 5 from the outside, and a predetermined voltage is applied to the pin 4 through the spring 5. The electrode structure and operation of the embodiment shown in FIG. 1 are almost the same as the conventional example shown in FIG. However, the embodiment shown in FIG. 1 has the following function in order to prevent creeping discharge on the inner wall of the vacuum vessel 1. That is, since one end of the resistance member 3 is in contact with the fluorescent surface 2 and the other end is in contact with the pin 4, when a high voltage is applied to the fluorescent surface 2 and a low voltage is applied to the pin 4, a steady voltage is applied to the resistance member 3. Current flows. Thereby, the withstand voltage characteristics between the fluorescent surface 2 and the pin 4 can be improved compared to the conventional example in which the inner wall of the vacuum container 1 is exposed. If the material, thickness, and shape of the resistance member 3 are taken into consideration, the resistance value of the resistance member 3 can be set to a sufficiently high value, so there is almost no problem with power consumption or stability. Furthermore, by utilizing the voltage drop caused by the resistive member 3, a voltage of an arbitrary magnitude between the voltage applied to the fluorescent surface 2 and the voltage applied to the pin 4 can be extracted. In this embodiment, a predetermined voltage is drawn out via a contact spring 9 and applied to a part of the internal electrode 7. Note that the resistance member 3 of this embodiment is a glass resistor in which an oxide of a transition metal such as manganese, iron, or copper is mixed with silica glass. However, this is just an example, and it goes without saying that the material is not limited to this material, and similar effects can be obtained by using other materials. For example, the following method can be used to manufacture the flat cathode ray tube of the present invention shown in FIG. After forming a fluorescent surface 2 on a front panel 11 having pins 4 on its inner wall, a resistive member 3 is applied, dried, and fired at an appropriate temperature. Structures such as internal electrodes 7 are assembled on the frame 6 in advance. A frame 6 is accurately attached to the completed front panel 11, and the front panel 11 and the back panel 12 are sealed together. As mentioned above, FIG. 1 shows one embodiment of the present invention. Pins 4 or similar support means for securing internal structures may be present on the back panel 12. In that case, the area covered with the resistance member 3 is from the front panel 11 to the back panel 1.
It may extend over two periods. Further, the resistance member 3 is not limited to one location, but can be divided into multiple locations and covered. For example, if the resistance member 3 is coated with a specific shape pattern, it becomes easier to set the resistance value more accurately and reduce the voltage applied to the fluorescent surface 2 to a desired level. FIG. 2 is a sectional view showing the schematic structure of a flat cathode ray tube according to another embodiment of the present invention. In this embodiment, a flat vacuum container 1 is formed by sealing a front panel 11 and a back plate 13 made of glass. Similar to the embodiment shown in FIG. 1, the inner wall of the front panel 11 is provided with a fluorescent surface 2 and pins 4 for fixing electrodes. The inner wall between the fluorescent surface 2 and the pin 4 is covered with a resistance member 3 such as a glass resistor so as to frame the fluorescent surface 2. Internal electrode 7 is fixed to frame 6 and attached to pin 4 via spring 5. Lead terminals 81 are provided in advance on the back plate 13 and connected to the internal electrodes 7 during sealing. The advantage of the embodiment shown in FIG. 2 is that by forming the back surface of the vacuum vessel 1 into a plate shape, the outer dimensions of the flat cathode ray tube can be made thinner. Furthermore, by providing the lead terminals 81 on the back plate 13, damage during sealing can be prevented and reliability can be improved. This makes it possible to apply a desired voltage to the internal electrode 7 by adding lead terminals 81, so there is no need to use the voltage reduced by the resistance member 3 as in the embodiment shown in FIG. . Although the embodiments of the present invention have been described above, the essence of the present invention is to prevent creeping discharge between the internal electrode support means and the fluorescent surface by coating the inner wall of the vacuum vessel with a resistive member. The aim is to improve physical characteristics. therefore,
It is also possible to configure the resistive member so that no current flows as long as the above-mentioned essence is not impaired. Alternatively, the resistance member may be coated to form a bank-like convex portion on the inner wall of the container. It goes without saying that since the creeping distance between the internal electrode support means and the fluorescent surface becomes substantially longer, the discharge prevention effect can be further enhanced. [Effects of the Invention] In the flat cathode ray tube of the present invention, creeping discharge on the inner wall of the vacuum container is suppressed by covering the region between the supporting means of the internal electrode provided on the inner wall of the vacuum container and the fluorescent surface with a resistive member. can be prevented. As a result, it is possible to maintain good voltage resistance characteristics between the fluorescent surface to which a high voltage is applied and the internal electrodes to which a low voltage is applied, and it is possible to apply a sufficiently high voltage to the fluorescent surface.

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

第1図は本発明の一実施例である平板状陰極線管の概略
構成を示した断面図、第2図は本発明の他の実施例の概
略構成を示した断面図、第3図は従来の平板状陰極線管
の概略構成を示した斜視図である。 符号の説明
FIG. 1 is a cross-sectional view showing a schematic configuration of a flat cathode ray tube according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a schematic configuration of another embodiment of the present invention, and FIG. 3 is a conventional 1 is a perspective view showing a schematic configuration of a flat cathode ray tube of FIG. Explanation of symbols

Claims (1)

【特許請求の範囲】 1、内面の少なくとも一部に螢光面を形成した真空容器
と、この螢光面を走査するための複数の電子ビームを射
出し、それらの電子ビームを偏向する電極手段とを少な
くとも備えた平板状陰極線管において、この真空容器の
内面に、少なくとも螢光面の外縁部を縁取るように抵抗
部材で被覆した領域を設けたことを特徴とする平板状陰
極線管。 2、前記抵抗部材で被覆した領域に少なくとも接して、
前記電極手段の少なくとも一部を支持する手段を設けた
ことを特徴とする特許請求の範囲第1項記載の平板状陰
極線管。 3、螢光面に印加した電圧を前記抵抗部材を介して所定
の電圧に減圧し、前記電極手段の少なくとも一部に印加
するように構成したことを特徴とする特許請求の範囲第
1項または第2項記載の平板状陰極線管。 4、内面の少なくとも一部に螢光面を形成し、その螢光
面の外縁部を縁取るように抵抗部材を被覆したことを特
徴とする真空容器。 5、電極等の構造物を支持する手段を設けた2分割可能
な真空容器の内面に螢光面を形成し、その螢光面の外縁
部を縁取るように抵抗部材を被覆し、次いでこの真空容
器の内部に前記電極等の構造物を組み込み、真空容器を
封着することを特徴とする平板状陰極線管の製造方法。 6、特許請求の範囲第1項から第5項までのいずれかに
記載の平板状陰極線管を用いてなることを特徴とする画
像表示装置。
[Claims] 1. A vacuum container having a fluorescent surface formed on at least a portion of its inner surface, and an electrode means for emitting a plurality of electron beams to scan the fluorescent surface and deflecting the electron beams. 1. A flat cathode ray tube comprising at least the following: a flat cathode ray tube comprising at least a region coated with a resistive member on the inner surface of the vacuum vessel so as to frame at least the outer edge of the fluorescent surface. 2. At least in contact with the area covered with the resistance member,
2. A flat cathode ray tube according to claim 1, further comprising means for supporting at least a portion of said electrode means. 3. The device is configured such that the voltage applied to the fluorescent surface is reduced to a predetermined voltage via the resistance member and applied to at least a portion of the electrode means, or 2. The flat cathode ray tube according to item 2. 4. A vacuum container characterized in that a fluorescent surface is formed on at least a portion of the inner surface, and a resistance member is coated so as to frame the outer edge of the fluorescent surface. 5. A fluorescent surface is formed on the inner surface of a vacuum container that can be divided into two and is provided with means for supporting structures such as electrodes, and a resistance member is coated so as to frame the outer edge of the fluorescent surface. 1. A method for manufacturing a flat cathode ray tube, which comprises incorporating a structure such as the electrodes into a vacuum container and sealing the vacuum container. 6. An image display device characterized by using the flat cathode ray tube according to any one of claims 1 to 5.
JP8821190A 1990-04-04 1990-04-04 Plate-like cathode-ray tube Pending JPH03289031A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8821190A JPH03289031A (en) 1990-04-04 1990-04-04 Plate-like cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8821190A JPH03289031A (en) 1990-04-04 1990-04-04 Plate-like cathode-ray tube

Publications (1)

Publication Number Publication Date
JPH03289031A true JPH03289031A (en) 1991-12-19

Family

ID=13936569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8821190A Pending JPH03289031A (en) 1990-04-04 1990-04-04 Plate-like cathode-ray tube

Country Status (1)

Country Link
JP (1) JPH03289031A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006066279A (en) * 2004-08-27 2006-03-09 Hitachi Displays Ltd Spontaneous light-emitting planar display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006066279A (en) * 2004-08-27 2006-03-09 Hitachi Displays Ltd Spontaneous light-emitting planar display device

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