JPH0216539B2 - - Google Patents
Info
- Publication number
- JPH0216539B2 JPH0216539B2 JP14461281A JP14461281A JPH0216539B2 JP H0216539 B2 JPH0216539 B2 JP H0216539B2 JP 14461281 A JP14461281 A JP 14461281A JP 14461281 A JP14461281 A JP 14461281A JP H0216539 B2 JPH0216539 B2 JP H0216539B2
- Authority
- JP
- Japan
- Prior art keywords
- insulating member
- electrode
- grid electrode
- electron gun
- electron
- 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
- 238000010894 electron beam technology Methods 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229920002647 polyamide Polymers 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
- H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes
Description
【発明の詳細な説明】
本発明は、陰極線管ことに高解像度の電子銃を
有する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 having a high resolution electron gun.
受像管としての陰極線管は、画像を表示する螢
光面を有し、螢光体を励起発光させるための電子
ビームを発生収束する電子銃を有する。電子銃に
は種々の形式のものがあり、通常はその電位分布
構造から、ユニポテンシヤル形電子銃、バイポテ
ンシヤル電子銃、クオドルポテンシヤル形電子銃
等が、目的に応じて用いられている。高解像度用
陰極線管は、前記螢光面上でより小さな電子ビー
ムスポツトを得る必要があり種々の考案がなされ
ている。 A cathode ray tube as a picture tube has a fluorescent surface for displaying an image, and has an electron gun that generates and converges an electron beam for exciting a phosphor to emit light. There are various types of electron guns, and depending on their potential distribution structure, unipotential electron guns, bipotential electron guns, quadruple potential electron guns, etc. are usually used depending on the purpose. In high-resolution cathode ray tubes, it is necessary to obtain a smaller electron beam spot on the phosphor surface, and various ideas have been developed.
従来より小さなスポツトを得るための構造とし
て、より大きなフオーカス部レンズ径を大きくと
ることを目的とした提案がなされている。例えば
実公昭47−20448号公報には、ネツクガラス部に
電導性膜を形成し、この導電性膜を電極とするこ
とにより、レンズを形成する方法が記載されてい
る。あるいは特開昭55−41678号公報には、電極
に細径部（ネツク部）を有するバイポテンシヤル
形電子銃が記載されている。しかしながら実公昭
47−20448号公報のものは電導性膜間の耐電圧、
膜寸法精度等の問題があり、実用化には到つてい
ない。又特開昭55−41678号公報に記載された電
子銃はレンズ径部を十分とつたにもかかわらず、
ネツク部の径によりレンズに入射する電子ビーム
径が規制され十分にその能力を発揮できない欠点
を有している。 As a structure for obtaining a smaller spot than in the past, proposals have been made for the purpose of increasing the lens diameter of a larger focus portion. For example, Japanese Utility Model Publication No. 47-20448 describes a method of forming a lens by forming an electrically conductive film on a neck glass portion and using this electrically conductive film as an electrode. Alternatively, Japanese Patent Laid-Open No. 55-41678 describes a bipotential electron gun having a narrow diameter portion (neck portion) in the electrode. However, Kimiaki
The one in Publication No. 47-20448 has a withstand voltage between conductive films,
It has not been put into practical use due to problems such as membrane dimensional accuracy. Furthermore, although the electron gun described in Japanese Patent Application Laid-open No. 55-41678 has a sufficient lens diameter,
This has the disadvantage that the diameter of the electron beam incident on the lens is restricted by the diameter of the neck portion, making it impossible to fully demonstrate its capabilities.
本発明はかかる現状に鑑みなされたもので、静
電レンズ部を構成する複数の電極を電子銃主軸方
向に重畳し且つ同軸に配設される絶縁部材によつ
て支持固定することにより、レンズ径を十分大き
くとつた電子銃を有する陰極線管を提供せんとす
るものである。 The present invention was made in view of the current situation, and by superimposing a plurality of electrodes constituting the electrostatic lens part in the direction of the main axis of the electron gun and supporting and fixing them by an insulating member disposed coaxially, the lens diameter It is an object of the present invention to provide a cathode ray tube having a sufficiently large electron gun.
第１図に本発明をバイポテンシヤル型電子銃に
適用した場合の構造を示す。カソードスリーブ１
０１の頭部に電子を放出する陰極部材１０３を塗
布したカソードは、カソードストラツプ１０２を
介し、前記カソードから放出される電子が通る透
孔１０４ａを電子銃主軸１上に有した第１格子電
極１０４、前記第１格子電極に対向して同じく電
子主軸１上に電子通過孔１０５ａを有する第２格
子電極１０５、及び電子銃主軸１上に電子通過孔
１０６ａを有する突出し筒部１０６ｂとこれらに
一体に成形もしくは非一体に成形され実質的に静
電レンズを形成する電１電極となるレンズ筒部１
０６ｃからなる第３格子電極が、ストラツプ１０
６ｄを介して、共通の第１の絶縁支持部材１１３
に植設支持固定されている。 FIG. 1 shows a structure in which the present invention is applied to a bipotential type electron gun. Cathode sleeve 1
The cathode is coated with a cathode member 103 that emits electrons on the head of 01, and has a first grid electrode 104 on the main shaft 1 of the electron gun that has a through hole 104a through which electrons emitted from the cathode pass through the cathode strap 102. , a second grid electrode 105 which faces the first grid electrode and also has an electron passage hole 105a on the electron main shaft 1, and a protruding cylindrical part 106b which has an electron passage hole 106a on the electron gun main shaft 1, and are integrated therewith. A lens barrel portion 1 that is molded or non-integrated and serves as an electrode that substantially forms an electrostatic lens.
The third grid electrode consisting of 06c is connected to the strap 10.
6d, the common first insulating support member 113
The planting support is fixed.
前記第３格子電極１０６のレンズ筒部１０６ｃ
の大径開口部の外壁の回りは、例えばポリアミド
等からなる第２の高絶縁部材１０７を配し、その
外側に静電レンズを形成する第２電極となる第４
格子電極１０８を配する。前記第３格子電極レン
ズ筒部１０６ｃと前記第２の高絶縁部材１０７
は、図中Ａ及びＢゾーンで重なりを有し、前記第
２の高絶縁部材１０７と前記第４格子電極１０８
は図中Ｂ及びＣゾーンで重なりを有する。即ち前
記第３格子電極１０６と第２の絶縁部材１０７、
第４格子電極１０８に共通のゾーンＢを有してい
る。一般に各電極は、円筒状を呈するのでこれら
各部材は同軸的に配列される。各ゾーンＡ，Ｂ，
Ｃの各長さ、l1l2l3は、絶縁部材の間電圧特性、
沿面耐圧特性及び、機械的強度により適宜選択で
きる。例えば、十分な耐圧特性を有し、各電子銃
の端面がなめらかであればl1及びl3は０mmに近く
することができる。あるいは絶縁部材の機械的強
度が十分あればl2を０mmあるいはマイナスの値を
とつてもよい。前記第３格子電極１０６はリード
線１１４及びインナーリード１１１アウターリー
ド１１２を介して外部より電圧が印加される。前
記第４格子電極１０８は、アノード（図示せず）
から連なる内部導電膜１０９及びコンタクト１１
３を介してアノード側から供給されている。しか
し電位の供給方式はこれに限ることはなく耐電圧
特性を満足すればいかように供給してもよい。 Lens cylinder portion 106c of the third grid electrode 106
A second highly insulating member 107 made of, for example, polyamide is arranged around the outer wall of the large-diameter opening, and a fourth member serving as a second electrode forming an electrostatic lens is placed outside the second highly insulating member 107.
A grid electrode 108 is arranged. The third grid electrode lens cylinder portion 106c and the second highly insulating member 107
has an overlap in zones A and B in the figure, and the second high insulation member 107 and the fourth grid electrode 108
has an overlap in zones B and C in the figure. That is, the third grid electrode 106 and the second insulating member 107,
The fourth grid electrode 108 has a common zone B. Since each electrode generally has a cylindrical shape, these members are arranged coaxially. Each zone A, B,
Each length of C, l 1 l 2 l 3 is the voltage characteristic between the insulating members,
It can be selected as appropriate depending on creeping pressure characteristics and mechanical strength. For example, if the electron gun has sufficient voltage resistance and the end face of each electron gun is smooth, l 1 and l 3 can be close to 0 mm. Alternatively, if the insulating member has sufficient mechanical strength, l 2 may be set to 0 mm or a negative value. A voltage is applied to the third grid electrode 106 from the outside through a lead wire 114, an inner lead 111, and an outer lead 112. The fourth grid electrode 108 is an anode (not shown).
Internal conductive film 109 and contact 11 connected from
3 from the anode side. However, the potential supply method is not limited to this, and may be supplied in any manner as long as the withstand voltage characteristics are satisfied.
次に本発明の他の実施例を第２図乃至第４図に
示す。第１図に示す実施例では第３格子電極１０
６の外側に第２の絶縁部材１０７を配しその外側
に第４格子電極１０８を配する例を示したが第２
図の実施例では、第３格子電極１０６の内側に第
２の絶縁部材１０７を配しその内側に第４格子電
極１０８を配している。この様な配置とすること
により、前記コンタクト１１３を配置する裕度を
とることができる。あるいは又第３図ａに示す如
く、第３格子電極１０６、第４格子電極１０８の
間に配された第２の絶縁部材１０７を、周方向に
複数分割し、全体として同軸的に配列してもよ
い。又、この場合の極端な例としては第３図ｂに
示すように第２の絶縁部材１０７ａ，１０７ｂ，
１０７ｃ，１０７ｄの幅を狭くしてあたかも４ケ
所で支持したかの如く実施することも可能である
が、これも同軸的に配列されたものと同じであ
り、これらは第３格子電極１０６と第４格子電極
１０８との耐電圧特性によつて選択されるべきも
のである。 Next, other embodiments of the present invention are shown in FIGS. 2 to 4. In the embodiment shown in FIG.
Although the example in which the second insulating member 107 is arranged outside the grid electrode 6 and the fourth grid electrode 108 is arranged outside the second insulating member 107 is shown,
In the illustrated embodiment, a second insulating member 107 is arranged inside the third grid electrode 106, and a fourth grid electrode 108 is arranged inside the second insulating member 107. By arranging the contacts 113 in this manner, it is possible to provide a margin for arranging the contacts 113. Alternatively, as shown in FIG. 3a, the second insulating member 107 disposed between the third grid electrode 106 and the fourth grid electrode 108 is divided into a plurality of parts in the circumferential direction and arranged coaxially as a whole. Good too. In addition, as an extreme example of this case, as shown in FIG. 3b, the second insulating members 107a, 107b,
It is also possible to reduce the width of 107c and 107d and implement it as if they were supported at four locations, but this is also the same as arranging coaxially, and these are the third grid electrode 106 and the third grid electrode 106. It should be selected depending on the withstand voltage characteristics with the four-grid electrode 108.
更には、第４図ａに示す如く、電子銃軸方向に
第２の絶縁部材１０７を分割してもよく、又第４
図ｂに示す如く第２の絶縁部材の端面をおりまげ
て第３格子電極１０６第４格子電極１０７の端面
を覆う様にして第３格子電極１０６、第４格子電
極１０８の耐電圧特性を高めることもできる。更
には第４図ｃの如く配設してもよい。 Furthermore, as shown in FIG. 4a, the second insulating member 107 may be divided in the axial direction of the electron gun.
As shown in Figure b, the end faces of the second insulating member are folded down to cover the end faces of the third grid electrode 106 and the fourth grid electrode 107, thereby increasing the withstand voltage characteristics of the third grid electrode 106 and the fourth grid electrode 108. You can also do that. Furthermore, they may be arranged as shown in FIG. 4c.
この様にして構成される第３格子電極１０６、
第４格子電極１０８及び第２の絶縁部材１０７
は、第２の絶縁部材が接着作用を有する場合に
は、第３格子電極１０６、第４格子電極１０８を
直接接着結合せしめればよい。又、前記第２の絶
縁部材１０７が接着作用を有しない場合には他の
接着材を介して接合せしめるか、あるいは機械的
に例えば嵌合形式により固定してもよい。さらに
第２の絶縁部材をカソード方向に延在させて第１
の絶縁材を兼ねるようにしてもよい。 The third grid electrode 106 configured in this way,
Fourth grid electrode 108 and second insulating member 107
If the second insulating member has an adhesive function, the third grid electrode 106 and the fourth grid electrode 108 may be directly adhesively bonded. Furthermore, if the second insulating member 107 does not have an adhesive function, it may be bonded with another adhesive, or may be mechanically fixed, for example, by a fitting method. Furthermore, the second insulating member is extended in the cathode direction, and the second insulating member is extended toward the cathode.
It may also serve as an insulating material.
以上のように本発明によれば、静電レンズを形
成する第１電極（第３格子電極）及び第２電極
（第４格子電極）によつて形成されるレンズ径は、
ネツクガラスの内径に近い十分大きな径をとるこ
とができるとともに組立て精度を低下することな
く有効に活用できる電子銃を有する陰極線管を得
ることができる。 As described above, according to the present invention, the lens diameter formed by the first electrode (third grid electrode) and second electrode (fourth grid electrode) forming the electrostatic lens is
It is possible to obtain a cathode ray tube having an electron gun which can have a sufficiently large diameter close to the inner diameter of the neck glass and which can be used effectively without reducing assembly accuracy.
第１図は本発明の一実施例を示す部分切欠側面
図、第２図乃至第４図は本発明の他の実施例を示
す部分断面図及び側面図である。
１０１……カソードスリーブ、１０３……陰極
部材、１０４……第１格子電極、１０５……第２
格子電極、１０６……静電レンズを形成する第１
電極（第３格子電極）、１０８……静電レンズを
形成する第２電極（第４格子電極）、１０７……
第２の絶縁部材、１１３……第１の絶縁部材。
FIG. 1 is a partially cutaway side view showing one embodiment of the present invention, and FIGS. 2 to 4 are partially sectional views and side views showing other embodiments of the present invention. 101... cathode sleeve, 103... cathode member, 104... first grid electrode, 105... second
Grid electrode, 106...first forming an electrostatic lens
Electrode (third grid electrode), 108... Second electrode (fourth grid electrode) forming an electrostatic lens, 107...
Second insulating member, 113...first insulating member.
Claims (1)
と第２の電極からなる静電レンス部とが順次配設
されてなる電子銃を有する陰極線管において、前
記電子ビーム発生制御部と前記第１の電極を支持
固定する第１の絶縁部材と、前記第１の電極と前
記第２の電極を支持固定する第２の絶縁部材とを
具備し、前記第１の電極と前記第２の絶縁部材及
び前記第２の絶縁部材と前記第２の電極が前記電
子銃主軸方向に重畳し且つ同軸に配設されてなる
電子銃を有することを特徴とする陰極線管。 ２ 第２の絶縁部材が電子ビーム発生制御部へ延
在し第１の絶縁部材を兼ね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 having an electron gun in which an electron beam generation control section and an electrostatic lens section consisting of at least a first electrode and a second electrode are sequentially arranged, a first insulating member that supports and fixes the control unit and the first electrode; and a second insulating member that supports and fixes the first electrode and the second electrode; A cathode ray tube comprising an electron gun in which the second insulating member and the second insulating member and the second electrode overlap and are coaxially disposed in the direction of the main axis of the electron gun. 2. The cathode ray tube according to claim 1, wherein the second insulating member extends to the electron beam generation control section and also serves as the first insulating member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14461281A JPS5846555A (en) | 1981-09-16 | 1981-09-16 | Cathode-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14461281A JPS5846555A (en) | 1981-09-16 | 1981-09-16 | Cathode-ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5846555A JPS5846555A (en) | 1983-03-18 |
| JPH0216539B2 true JPH0216539B2 (en) | 1990-04-17 |
Family
ID=15366070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14461281A Granted JPS5846555A (en) | 1981-09-16 | 1981-09-16 | Cathode-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5846555A (en) |
-
1981
- 1981-09-16 JP JP14461281A patent/JPS5846555A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5846555A (en) | 1983-03-18 |
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