JPS6329778B2 - - Google Patents
Info
- Publication number
- JPS6329778B2 JPS6329778B2 JP56005502A JP550281A JPS6329778B2 JP S6329778 B2 JPS6329778 B2 JP S6329778B2 JP 56005502 A JP56005502 A JP 56005502A JP 550281 A JP550281 A JP 550281A JP S6329778 B2 JPS6329778 B2 JP S6329778B2
- Authority
- JP
- Japan
- Prior art keywords
- cathode ray
- ray tube
- cathode
- wall
- grid electrode
- 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.)
- Expired
Links
- 239000002184 metal Substances 0.000 claims description 15
- 239000011521 glass Substances 0.000 claims description 13
- 239000011324 bead Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/484—Eliminating deleterious effects due to thermal effects, electrical or magnetic fields; Preventing unwanted emission
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/88—Coatings
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Description
【発明の詳細な説明】
この発明は、陰極線管に係り、特に耐電圧特性
を向上させた陰極線管に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cathode ray tube, and more particularly to a cathode ray tube with improved voltage resistance characteristics.
陰極線管、例えば、カラー受像管は、耐電圧特
性が悪いと、受像機に組み立てられたのち、カラ
ー受像管のネツク内部に装着された電子銃の印加
電圧の異なる電極間及びこれら電極とネツク内壁
間を介して放電を起こし、カソード面を損傷した
り、受像機の回路部品を焼損したりすることがあ
る。特に最近のカラー受像管では画像品質を向上
させるためにアノードに30KV程度の高電圧が印
加されるので放電防止は重要な問題となつてい
る。 When a cathode ray tube, for example a color picture tube, has poor voltage resistance characteristics, after it has been assembled into a picture receiver, the electron gun installed inside the neck of the color picture tube has problems between electrodes with different applied voltages, and between these electrodes and the inner wall of the neck. A discharge may occur through the gap, damaging the cathode surface or burning out the circuit components of the receiver. In particular, in recent color picture tubes, a high voltage of about 30 KV is applied to the anode to improve image quality, so prevention of discharge has become an important issue.
このような受像管、例えば、インライン型バイ
ポテンシヤル電子銃では、第４グリツド電極に約
30KV、第３グリツド電極には4.5KV乃至7KV、
第２グリツド電極には400V乃至900Vの電圧が印
加されている。そして受像管内放電現象の大部分
は、はじめネツク内壁及び各電極を保持している
ビード・ガラス表面に電子衝撃によるグローを伴
う。 In such a picture tube, for example, an in-line bipotential electron gun, the fourth grid electrode is approximately
30KV, 4.5KV to 7KV for the third grid electrode,
A voltage of 400V to 900V is applied to the second grid electrode. Most of the discharge phenomena in the picture tube are accompanied by a glow caused by electron impact on the inner wall of the net and the surface of the bead glass holding each electrode.
このグローによりガラス表面やビード・ガラス
表面からイオン化したガスが放出され、周辺の電
気絶縁を劣化させると同時に、２次電子放出の為
その表面は正に帯電し、グローの成長が助長され
放電にいたると考えられている。 Due to this glow, ionized gas is released from the glass surface and bead/glass surface, deteriorating the surrounding electrical insulation, and at the same time, the surface becomes positively charged due to secondary electron emission, which promotes the growth of the glow and causes a discharge. It is believed that there are many.
これに対し、使用時の２乃至３倍の高電圧を電
極に印加する、いわゆるスポツト・ノツキング処
理を行なつているが、放電防止は未だ充分でな
い。 In order to deal with this, a so-called spot knocking treatment has been carried out in which a voltage two to three times higher than that used in use is applied to the electrodes, but this is still insufficient to prevent discharge.
インライン型バイポテンシヤル電子銃を例にこ
の原因を説明する。第１図に示す様に第１乃至第
４グリツド電極１１，１２，１３，１４およびカ
ソード１５がビード・ガラス１６によつて保持さ
れた電子銃がネツク１７内に配設されている。こ
れら電極に所定の電圧を印加した時のこのネツク
１７内面に沿つた電位分布は、第２図の曲線ａで
示す通りであり、第４グリツド電極１４からカソ
ード１５に向つての降下は緩慢である。ネツク内
壁表面の電位は、中電圧を印加する電極、すなわ
ち第３グリツド電極１３や、低電圧を印加する電
極、すなわち第２グリツド電極１２、そして接地
電圧である第１グリツド電極１１付近においても
かなり高く、これら、第１，第２グリツド電極１
１，１２との間に高い電位差がある。この電位差
が電子ビームに作用してグローを生ずると考えら
れる。従つてこの対策として電位分布を第２図に
おける曲線ｂのように、第１，第２グリツド電極
１１，１２又は第３グリツド電極１３付近で引き
下げてやればよい。 The cause of this will be explained using an in-line bipotential electron gun as an example. As shown in FIG. 1, an electron gun having first to fourth grid electrodes 11, 12, 13, 14 and a cathode 15 held by a bead glass 16 is disposed in a neck 17. When a predetermined voltage is applied to these electrodes, the potential distribution along the inner surface of this net 17 is as shown by curve a in FIG. 2, and the drop from the fourth grid electrode 14 toward the cathode 15 is slow. be. The potential on the inner wall surface of the network is quite high near the electrode that applies a medium voltage, that is, the third grid electrode 13, the electrode that applies a low voltage, that is, the second grid electrode 12, and the first grid electrode 11 that is the ground voltage. These first and second grid electrodes 1
There is a high potential difference between 1 and 12. It is thought that this potential difference acts on the electron beam to produce a glow. Therefore, as a countermeasure to this problem, the potential distribution may be lowered near the first and second grid electrodes 11, 12 or the third grid electrode 13, as shown by curve b in FIG.
この方法としては、例えば、第３図，第４図に
示すように金属部材２８でビード・ガラス２６の
ネツク内壁対向面を取り囲むようにし、この両端
を第３グリツド電極２３に固着し、第３グリツド
電極２３と同電位にすれば、第２図に示した曲線
ａから曲線ｂのようになり、良好な耐電圧特性の
陰極線管が得られる。 In this method, for example, as shown in FIGS. 3 and 4, the metal member 28 surrounds the surface of the bead glass 26 facing the inner wall of the neck, and both ends of the metal member 28 are fixed to the third grid electrode 23. If the potential is the same as that of the grid electrode 23, the curve a will change to the curve b shown in FIG. 2, and a cathode ray tube with good withstand voltage characteristics can be obtained.
本発明の目的は、前記陰極線管より数段耐電圧
特性を向上させた陰極線管の提供にある。 An object of the present invention is to provide a cathode ray tube whose withstand voltage characteristics are improved several times over the cathode ray tubes described above.
本発明によれば、ネツク内部に装着されカソー
ド及び印加電圧の異なる少なくとも３個のグリツ
ド電極がビード・ガラスによつて保持された陰極
線管に於て、グリツド電極のうち陰極線管の蛍光
面に最も近い電極にアノード電圧が印加されてお
り、かつカソードと蛍光面に最も近い電極を除い
て少なくとも１個のグリツド電極からビード・ガ
ラスのネツク内壁対向面を取り囲むようにし、両
端がグリツド電極に固着された金属部材を持ちか
つネツク内壁にスパツタ被膜を形成したことを特
徴とする陰極線管が得られる。 According to the present invention, in a cathode ray tube in which a cathode and at least three grid electrodes with different applied voltages are mounted inside the network and are held by bead glass, one of the grid electrodes is located on the phosphor screen of the cathode ray tube. The anode voltage is applied to the nearest electrode, and at least one grid electrode, excluding the electrode closest to the cathode and the phosphor screen, surrounds the opposing surface of the inner wall of the bead glass neck, and both ends are fixed to the grid electrode. A cathode ray tube is obtained, which is characterized in that it has a metal member having a sintered structure and has a spatter coating formed on the inner wall of the neck.
発明者らは、金属部材２８を高周波加熱し、そ
の一部を蒸発させネツク内壁にスパツタ被膜を形
成すると、耐電圧特性が大巾に改善されることを
発見した。このスパツタ被膜は２次電子放出に対
し抑制作用があり、ネツク内壁電圧安定に寄与す
る為と考えられる。 The inventors have discovered that when the metal member 28 is heated with high frequency to evaporate a portion of the metal member 28 to form a spatter coating on the inner wall of the neck, the withstand voltage characteristics are greatly improved. It is thought that this sputter coating has a suppressing effect on secondary electron emission and contributes to stabilizing the network inner wall voltage.
次に実施例により本発明を説明する。第５図は
縦断面図、第６図は第５図をＢ−B′線で切断し
た横断面図である。本実施例は、第１グリツド電
極３１，第２グリツド電極３２，第３グリツド電
極３３，第４グリツド電極３４，およびカソード
３５がビード・ガラス３６によつて保持されたイ
ンライン型バイポテンシヤル電子銃に於て、ビー
ド・ガラス３６のネツク３７内壁対向面を金属部
材３８で取り囲みその両端を第３グリツド電極３
３に固着し、かつネツク内壁にスパツタ被膜３９
を形成したことを特徴としている。 Next, the present invention will be explained with reference to examples. FIG. 5 is a longitudinal cross-sectional view, and FIG. 6 is a cross-sectional view of FIG. 5 taken along line B-B'. This embodiment is an in-line bipotential electron gun in which a first grid electrode 31, a second grid electrode 32, a third grid electrode 33, a fourth grid electrode 34, and a cathode 35 are held by a bead glass 36. The surface of the bead glass 36 facing the inner wall of the neck 37 is surrounded by a metal member 38, and both ends thereof are connected to the third grid electrode 3.
3, and spatter coating 39 on the inner wall of the neck.
It is characterized by the formation of
本実施例に於いて、金属部材３８として厚さ８
０μm巾２mmのテープ状金属部材を使用した。従
来のワイヤ状金属部材の場合は、スパツタ被膜３
９を形成するのに排気完了後高周波加熱が必要で
あつたが、テープ状金属部材の場合は、排気工程
の高波加熱で充分所望のスパツタ被膜３９の形成
が得られ、排気完了後の高周波加熱工程が省略出
来る利点がある。 In this embodiment, the metal member 38 has a thickness of 8
A tape-shaped metal member with a width of 0 μm and 2 mm was used. In the case of conventional wire-shaped metal members, spatter coating 3
9, high-frequency heating was required after completion of evacuation, but in the case of tape-shaped metal members, high-frequency heating during the evacuation process was sufficient to form the desired spatter coating 39, and high-frequency heating after completion of evacuation was sufficient to form the desired spatter coating 39. There is an advantage that the process can be omitted.
テープ状金属の厚さは、電極への固着方法とス
パツタ被膜３９の量とによつて実際的には10μm
乃至200μmに制限されよう。同様に巾は電極への
固着方法と固着する電極の大きさによつて制限を
受け、0.6mm乃至5.0mmが妥当と思われる。 The thickness of the metal tape is actually 10 μm depending on the method of fixing it to the electrode and the amount of spatter coating 39.
It may be limited to between 200 μm and 200 μm. Similarly, the width is limited by the method of fixing to the electrode and the size of the fixed electrode, and 0.6 mm to 5.0 mm is considered appropriate.
この発明は以上説明したように、ネツク内壁へ
のスパツタ被膜の形成により、陰極線管の耐電圧
特性が大巾に改善されるのでその工業的価値は大
である。 As explained above, this invention has great industrial value because the withstand voltage characteristics of the cathode ray tube are greatly improved by forming a sputter coating on the inner wall of the neck.
第１図は陰極線管用電子銃の縦断面図、第２図
はネツク内壁の電位分布を示す曲線図、第３図は
ビード・ガラスのネツク内壁対向面を取り囲む金
属部材を持つ従来の陰極線管用電子銃の縦断面
図、第４図は、第３図をＡ−A′線に沿つて切断
した横断面図、第５図は本発明の陰極線管用電子
銃の実施例の縦断面図、第６図は第５図をＢ−
B′線に沿つて切断した横断面図である。
１１，２１，３１…第１グリツド電極、１２，
２２，３２…第２グリツド電極、１３，２３，３
３…第３グリツド電極、１４，２４，３４…第４
グリツド電極、１５，２５，３５…カソード、１
６，２６，３６…ビード・ガラス、１７，２７，
３７…ネツク、２８，３８…金属部材、３９…ス
パツタ被膜。
Figure 1 is a longitudinal cross-sectional view of an electron gun for cathode ray tubes, Figure 2 is a curve diagram showing the potential distribution on the inner wall of the net, and Figure 3 is a conventional electron gun for cathode ray tube with a metal member surrounding the opposing surface of the inner wall of the bead glass neck. FIG. 4 is a longitudinal sectional view of the gun; FIG. 4 is a transverse sectional view of FIG. 3 taken along line A-A'; FIG. The figure is B-
FIG. 3 is a cross-sectional view taken along line B'. 11, 21, 31...first grid electrode, 12,
22, 32...Second grid electrode, 13, 23, 3
3...Third grid electrode, 14, 24, 34...Fourth
Grid electrode, 15, 25, 35... cathode, 1
6,26,36...bead glass, 17,27,
37...Net, 28, 38...Metal member, 39...Spatter coating.
Claims (1)
の異なる少なくとも３個のグリツド電極がビード
ガラスによつて保持された陰極線管に於て、前記
グリツド電極のうち前記陰極線管の蛍光面に最も
近い電極にアノード電圧が印加されており、かつ
前記カソードと蛍光面に最も近い電極を除いた少
なくとも１個のグリツド電極から、前記ビード・
ガラスのネツク内壁対向面を取り囲むようにし、
両端が前記グリツド電極に固着された金属部材を
持ち、かつネツク内壁にスパツタ被膜を形成した
ことを特徴とする陰極線管。 ２ 前記金属部材は厚さ10μm乃至200μm、巾0.6
mm乃至5.0mmであることを特徴とする特許請求の
範囲第１項記載の陰極線管。[Scope of Claims] 1. In a cathode ray tube in which a cathode and at least three grid electrodes with different applied voltages are mounted inside a network and are held by bead glass, one of the grid electrodes is a fluorescent screen of the cathode ray tube. An anode voltage is applied to the electrode closest to the bead and at least one grid electrode excluding the electrode closest to the cathode and the phosphor screen.
Surround the opposing inner wall of the glass,
1. A cathode ray tube having metal members fixed to the grid electrodes at both ends thereof, and having a spatter coating formed on the inner wall of the neck. 2 The metal member has a thickness of 10 μm to 200 μm and a width of 0.6
The cathode ray tube according to claim 1, wherein the cathode ray tube has a diameter of 5.0 mm to 5.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP550281A JPS57119437A (en) | 1981-01-16 | 1981-01-16 | Cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP550281A JPS57119437A (en) | 1981-01-16 | 1981-01-16 | Cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57119437A JPS57119437A (en) | 1982-07-24 |
| JPS6329778B2 true JPS6329778B2 (en) | 1988-06-15 |
Family
ID=11612983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP550281A Granted JPS57119437A (en) | 1981-01-16 | 1981-01-16 | Cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57119437A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0670892B2 (en) * | 1985-04-15 | 1994-09-07 | 株式会社日立製作所 | Color cathode ray tube manufacturing method |
| JP2905224B2 (en) * | 1988-11-02 | 1999-06-14 | 株式会社東芝 | Cathode ray tube |
| JP3635153B2 (en) * | 1996-05-28 | 2005-04-06 | 株式会社東芝 | Electron gun for cathode ray tube and cathode ray tube |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5512372U (en) * | 1978-07-12 | 1980-01-26 | ||
| JPS55122345A (en) * | 1979-03-09 | 1980-09-20 | Rca Corp | Cathode ray tube |
| JPS56123651A (en) * | 1980-03-05 | 1981-09-28 | Toshiba Corp | Color cathode-ray tube |
-
1981
- 1981-01-16 JP JP550281A patent/JPS57119437A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5512372U (en) * | 1978-07-12 | 1980-01-26 | ||
| JPS55122345A (en) * | 1979-03-09 | 1980-09-20 | Rca Corp | Cathode ray tube |
| JPS56123651A (en) * | 1980-03-05 | 1981-09-28 | Toshiba Corp | Color cathode-ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57119437A (en) | 1982-07-24 |
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