JPS60253128A - Manufacture of electrode for electron gun - Google Patents
Manufacture of electrode for electron gunInfo
- Publication number
- JPS60253128A JPS60253128A JP10830184A JP10830184A JPS60253128A JP S60253128 A JPS60253128 A JP S60253128A JP 10830184 A JP10830184 A JP 10830184A JP 10830184 A JP10830184 A JP 10830184A JP S60253128 A JPS60253128 A JP S60253128A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- thick plate
- coining
- holes
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はカラー受像管用インライン形電子銃の電極の製
造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method of manufacturing an electrode for an in-line electron gun for a color picture tube.
一般にカラー受像管用電子銃の電極のレンズ口径は、フ
ォーカス特性に大きく影響し、好適なフォーカス特性を
得るにはレンズ口径を可能な限り大きくすることが望ま
しい。In general, the lens aperture of the electrode of an electron gun for a color picture tube greatly affects the focus characteristics, and it is desirable to make the lens aperture as large as possible in order to obtain suitable focus characteristics.
第２図は従来のパイポテンシャル集束方式のインライン
形電子銃の一例を示す要部断面図である。FIG. 2 is a sectional view of a main part of an example of a conventional pi-potential focusing type in-line electron gun.
ＩＡ、ＩＢ、ＩＣはそれぞれ３本の電子ビームＡ１Ｂ、
Ｃを頂面から放射するカソード、２は電子ビームＡ、Ｂ
１Ｃを制御する制御電極、３は電子ビームＡ１Ｂ１Ｃを
加速させる刀口速電極、４は電子ビームＡ、Ｂ、Ｃを集
束させる下部集束電極であり、前記各電極２．３．４は
それぞれ３本の電子ビームＡ、Ｂ、Ｃの電子ビーム通過
穴２Ａ、２Ｂ。IA, IB, and IC each have three electron beams A1B,
A cathode that emits C from the top surface, 2 is an electron beam A, B
1C, a control electrode 3 that accelerates the electron beams A1B1C, and 4 a lower focusing electrode that focuses the electron beams A, B, and C. Each of the electrodes 2, 3, and 4 has three electrodes. Electron beam passage holes 2A, 2B for electron beams A, B, and C.
２Ｃ１３Ａ、３Ｂ、３Ｃおよび４Ａ、４Ｂ、４０を有す
る。５は上部集束電極、６は陽極であり、上部集束電極
５と陽極６とはそれぞれ底面に対向して設けられた３個
の絞り穴５Ａ、５Ｂ、ｓＣと６Ａ１６Ｂ１６Ｃとで３本
の電子ビームＡ、 １３゜Ｃに対応する３個の電極を形
成している。７はコンバーゼンス電極でアル。2C13A, 3B, 3C and 4A, 4B, 40. 5 is an upper focusing electrode, 6 is an anode, and the upper focusing electrode 5 and the anode 6 each have three aperture holes 5A, 5B, sC and 6A16B16C provided opposite to each other on the bottom surface, and three electron beams A are formed. , three electrodes corresponding to 13°C are formed. 7 is the convergence electrode.
そこで、３個のカソードＩＡ、ＩＢ、ｉｃに与える信号
電位によってそれぞれの電子ビーム量が制御された３本
の電子ビームＡ、Ｂ、Ｃは、加速電極３と下部集束電極
４との対向した各穴間で形成されるプリフォーカスレン
ズで着干の集束作用を受けた後、上部集束電極５と陽極
６とで形成されるそれぞれの電極によって、図示しない
受像管の螢光面で結像するように集束作用を受ける。同
時に両側の電子ヒームＡ、Ｃは陽極６の電子ビーム通過
穴６Ａ、６Ｃを、上部集束電極５の電子ビーム通過穴５
Ａ１５Ｃに対して外側に微小偏心させる公知の手段によ
って角度θの傾帆を与え、３本の電子ビームＡ、Ｂ％Ｃ
を一点にコンバーゼンスさせる。Therefore, the three electron beams A, B, and C, each of which has an electron beam amount controlled by the signal potential applied to the three cathodes IA, IB, and IC, are placed between the accelerating electrode 3 and the lower focusing electrode 4, respectively. After being subjected to a focusing action by the prefocus lens formed between the holes, an image is formed on the fluorescent surface of the picture tube (not shown) by the respective electrodes formed by the upper focusing electrode 5 and the anode 6. receives a focusing effect. At the same time, the electron beams A and C on both sides connect the electron beam passage holes 6A and 6C of the anode 6 to the electron beam passage hole 5 of the upper focusing electrode 5.
The three electron beams A, B%C are tilted at an angle θ by a known means of slightly eccentrically eccentric to the outside of A15C.
converge to one point.
第３図は上部集束′電極５の上面を示す平面図である。FIG. 3 is a plan view showing the top surface of the upper focusing electrode 5. FIG.
直径りの３個の電子ビーム通過穴５Ａ１５Ｂ、ｓＣはそ
れぞれ開隔Ｓで一直線上にインライン状に配列されてい
る。Three diameter electron beam passing holes 5A15B and sC are arranged in-line in a straight line with an opening S between them.
ところで、受像管の螢光面上での結像点の大きさ、すな
わちフォーカス特性は、画像の鮮鋭度を左右するため、
可能な限り小さくすることが望ましく、またフォーカス
特性の向−ヒには一般に！極の口径を大きくするこさが
行なわれている。そこで、電極の口径を拡大するには電
子ビーム通過穴５Ａ、、５Ｂ、５Ｃの直径Ｉ）を太きぐ
する必要がある。By the way, the size of the image point on the fluorescent surface of the picture tube, that is, the focus characteristics, affects the sharpness of the image, so
It is desirable to make it as small as possible, and generally for improving focus characteristics! Efforts are being made to increase the diameter of the poles. Therefore, in order to enlarge the diameter of the electrode, it is necessary to increase the diameter I) of the electron beam passage holes 5A, 5B, and 5C.
しかし、厚さが約０．３ ｒｍの非磁性金属、例えばス
テ／レス鋼板をプレス加工して形成する上部集束電極５
の電子ビーム通過穴５Ａ、 ５に３，５Ｃは、陽極６と
の耐電圧特性改良のため、絞り穴構造とする必要がある
。さら１こ成極電界の回転対称性の劣化防上には絞り深
さｌを穴の直径りのＷ以上必要とするため、部品加工上
の問題から直径りは穴間間Ｓよりも０８〜１． Ｏｒｔ
ｔｗ、小さい寸法に制約される。また穴間間Ｓを大きく
することは、受像管動作時の螢光面各点でのコンバーゼ
ンスＩＪ５ｂが大キくなることおよび電極を形成する上
部集束電極５と陽極６との水平方向の寸法が大きくなっ
て電子銃が収容されるバルブ本ンクの内壁に近接して耐
′区圧特性が劣化するという問題があった。However, the upper focusing electrode 5 is formed by pressing a non-magnetic metal such as a stainless steel plate with a thickness of about 0.3 rm.
The electron beam passing holes 5A, 5, 3, and 5C need to have an aperture hole structure in order to improve the withstand voltage characteristics with the anode 6. Furthermore, in order to prevent deterioration of the rotational symmetry of the polarizing electric field, the drawing depth l needs to be greater than the diameter W of the hole, so due to problems in parts processing, the diameter should be 08~08~ 1. Ort.
tw, constrained to small dimensions. In addition, increasing the hole spacing S increases the convergence IJ5b at each point on the fluorescent surface during picture tube operation, and also increases the horizontal dimension of the upper focusing electrode 5 and anode 6 that form the electrodes. There is a problem in that, as the electron gun becomes larger, its pressure resistance characteristics deteriorate as it approaches the inner wall of the valve main tank in which the electron gun is housed.
また良好なフォーカス特性を得るには、電子ビーム通過
穴５Ａ、５Ｂ、ｓｃの真円度誤差（長径−短径）は穴径
りの約０．５％以下が望ましいとされている。このため
、電子銃の組立は、各々の電子ビーム通過穴を貫通する
３本の芯金を備えた治具（図示せず）上に各電極を保持
し、加熱したマルチフオームがラス８を支持体９に圧着
して行なわれる。この場合、３本の芯金は各電極部品の
穴ピッチＳおよび穴径りに誤差があるため、穴径りより
も００２〜０．０３ ｍ程度細く設定される。したがっ
て、谷電極部品製作時の誤差およびマルチフオームｔｆ
ラス８の圧潰時の応力によってカップ状本体の変形が絞
り穴で形成される電子ビーム通過穴５Ａ、５１３．５Ｃ
に波及しＣ治具から取り外した状態で測定した真円度誤
差は極端な場合には約０．０５龍、つまり穴径Ｄ ＝
３．９ ｙａｒｎの場合的１．３％に達することがある
。このように真円度の低下により主レンズの′ｌ！を極
が歪むことによつＣ１１を子ヒームに非点収ｋが生じ、
フォーカス特性が損なわれる。Furthermore, in order to obtain good focusing characteristics, it is said that the roundness error (major axis - minor axis) of the electron beam passing holes 5A, 5B, and sc is desirably about 0.5% or less of the hole diameter. Therefore, to assemble the electron gun, each electrode is held on a jig (not shown) equipped with three core metals that pass through each electron beam passage hole, and the heated multiform supports the lath 8. This is done by pressing it onto the body 9. In this case, since there is an error in the hole pitch S and hole diameter of each electrode component, the three core metals are set to be about 0.02 to 0.03 m thinner than the hole diameter. Therefore, errors in manufacturing valley electrode parts and multiform tf
Electron beam passing holes 5A and 513.5C in which deformation of the cup-shaped main body is formed by the aperture hole due to stress when the lath 8 is crushed.
In extreme cases, the roundness error measured when removed from the C jig is approximately 0.05 mm, that is, the hole diameter D =
It can reach 1.3% in case of 3.9 yarn. In this way, due to the decrease in roundness, the main lens' l! Due to the distortion of the pole, astigmatism k occurs in C11 as a child beam,
Focus characteristics are impaired.
本発明の目的は、電極口径を拡大するとともに電極の精
度を向上させ、フォーカス特性を向上させた電子銃用電
極の製造方法を提供することにある。An object of the present invention is to provide a method for manufacturing an electrode for an electron gun, which increases the electrode diameter, improves the accuracy of the electrode, and improves the focusing characteristics.
本発明は、上記目的を達成するために、厚板素材にイン
ライン状の３つの電子ビーム通過穴に相当する箇所にそ
れぞれ所定のコイニング下穴を形成し、次いで厚板素材
の一方の面に所望とする深さの凹面を形成し、−七の後
厚板素材の外形を所定寸法より゛大きい外形に打抜き加
工し、ｌｉ！ｃ（１て前記コイニング下穴の箇所に該コ
イニング下穴より大きく所定寸法より小さい内径に打抜
きａｎ工し、次に厚板の両面を平面ならしをし、最後に
外形及び３個の電子ビーム通過穴を所定寸法にシェービ
ング加工することを特徴とする。In order to achieve the above object, the present invention forms predetermined coining pilot holes in a thick plate material at locations corresponding to three inline electron beam passage holes, and then forms desired coining pilot holes on one side of the thick plate material. After forming a concave surface with a depth of -7, the outer shape of the thick plate material is punched out to a larger outer shape than the predetermined size, and li! c (1) Punch the area of the coining pilot hole to an inner diameter larger than the coining pilot hole and smaller than the specified size, then level both sides of the thick plate, and finally punch the outer shape and three electron beams. It is characterized by shaving the passage hole to a predetermined size.
以Ｆ１本発明の一実施例を第１図１こより説明する。ま
ず同図（ａ）１こ示すように、厚さ約２龍の厚板素材１
０に３個の電子ビーム通過穴に相当する箇所にそれぞれ
所定のコイニング下穴１１を形成する。この場合、これ
らの下穴１１は次の工程で凹面にコイニング加工するた
めのコイニング加工力の低減および高精度の凹面を形成
することを目的としている。したがって、これらの下穴
１１の穴形状は図示の実施例では円穴としているが、円
穴以外の他の形状の穴でもよい。An embodiment of the F1 invention will now be described with reference to FIG. First, as shown in Figure (a) 1, a thick plate material 1 with a thickness of about 2 dragons.
Predetermined coining pilot holes 11 are formed at locations corresponding to the three electron beam passage holes. In this case, the purpose of these prepared holes 11 is to reduce the coining force for coining a concave surface in the next step and to form a highly accurate concave surface. Therefore, although the hole shapes of these pilot holes 11 are circular holes in the illustrated embodiment, they may have other shapes than circular holes.
次に同図（ｂｌに示すように、厚板素材１０の一方の面
に所定の楕円状の凹面とほぼ同形状の楕円状の凹面１２
をコイニング加工によって形成する。Next, as shown in FIG.
is formed by coining processing.
その後同図ｆｃ）に示すように、厚板素材の外形を所定
寸法より大きい外形に打抜き加工して長円形厚板状電極
１３を形成する。引き続き３個の電子ビーム通過穴に相
当する箇所に前記コイ二ン°グ下穴１１より大きく所定
寸法より小さい内径の打抜き穴を打抜き加工する。この
場合、両サイドの打抜き穴と外形とのブリッジ部Ｈには
板厚減少及びねじれによる変形が生じ、この部分の平面
度が著しく低下する。これを矯正するために、次に長円
形厚板の両面に平面ならしを施す。この平面ならしは、
厚板の外形及び楕円凹面を拘束しながらプレス金型など
の方法により施される。最後に、同図ｆｄ）に示すよう
に、長円形厚板の外形及び３個の電子ビーム通過穴１４
Ａ、１４Ｂ、１４Ｃをそれぞれ所定寸法にシェービング
加工し゛Ｃ電子銃用電極１５を完成する。Thereafter, as shown in fc) of the same figure, the outer shape of the thick plate material is punched out to have an outer shape larger than a predetermined size to form an oval thick plate electrode 13. Subsequently, holes are punched out at locations corresponding to the three electron beam passage holes, each having an inner diameter larger than the coining pilot hole 11 and smaller than a predetermined dimension. In this case, the bridge portion H between the punched holes on both sides and the outer shape is deformed due to reduction in plate thickness and twisting, and the flatness of this portion is significantly reduced. In order to correct this, both sides of the oblong plank are then leveled. This leveling of the plane is
It is applied by a method such as a press mold while constraining the outer shape and elliptical concave surface of the thick plate. Finally, as shown in figure fd), the outer shape of the oval thick plate and the three electron beam passing holes 14 are
A, 14B, and 14C are each shaved to predetermined dimensions to complete the C electron gun electrode 15.
このように、厚板素材１０にコイニング加工、打抜き加
工及びシェービング加工などを施して電子銃用電極１５
を形成するので、電子ビーム通過穴１４Ａ、１４Ｂ、１
４Ｃの穴間隔を大きくしなくても電極口径を拡大するこ
とができ、耐電圧特性が向上するとともに、電極口径の
真円度も向上し、フォーカス特性が向上する。In this way, the electron gun electrode 15 is formed by performing coining, punching, shaving, etc. on the thick plate material 10.
, the electron beam passing holes 14A, 14B, 1
The electrode aperture can be enlarged without increasing the hole interval of 4C, and the withstand voltage characteristics are improved, as well as the roundness of the electrode aperture is improved, and focus characteristics are improved.
以上の説明から明らかなように、本発明になる電子銃用
電極の製造方法によれば、耐電圧特性を損うことなしに
電極口径を拡大することができ、また電極口径の真円度
も向上し、フォーカス特性を向上できる電子銃用電極が
得られる。As is clear from the above explanation, according to the method of manufacturing an electrode for an electron gun according to the present invention, the diameter of the electrode can be increased without impairing the withstand voltage characteristics, and the circularity of the diameter of the electrode can also be improved. Thus, an electrode for an electron gun that can improve focus characteristics can be obtained.
第１図ｆａＨｂｌｔｅｌｔｄ）は本発明になる電子銃用
電極の製造方法の一実施例の１程説明を示す平面図及び
断面図、第２図は従来のインライン形電子銃の要部断面
１ス、第３図は第２図の上部集束電極の平面図である。
１０・・・厚板素材、 １１・・・コイニング下穴、１
２・・・凹面、 １３・・・長円形厚板状１１！極、１
４Ａ、１４１Ｊ、１４Ｃ・・・電子ビーム通過穴、１５
・・・電子銃用電極水。
代理人 弁即士 高 橋 明 夫
第１図
ＩＩ ＩＩ ＩＩ
第２図
第３図FIG. 1 is a plan view and a cross-sectional view showing a first embodiment of the method for manufacturing an electrode for an electron gun according to the present invention, and FIG. 2 is a cross-sectional view of a main part of a conventional in-line electron gun. FIG. 3 is a plan view of the upper focusing electrode of FIG. 2. 10...Thick plate material, 11...Coining pilot hole, 1
2... Concave surface, 13... Oval thick plate shape 11! pole, 1
4A, 141J, 14C...Electron beam passing hole, 15
...Electrode water for electron guns. Agent: Attorney Akio Takahashi Figure 1 II II II Figure 2 Figure 3
Claims (1)
当する箇所にそれぞれ所定のコイニング下穴を形成する
工程と、厚板、素材の一方の面に所望とする深さの凹面
をコイニングにより形成する工程と、厚板、素材の外形
を所定寸法より大きい外形に打抜き加工する工程と、前
記コイニング下穴の箇所に該コイニング下穴より大きく
所定寸法より小さい内径に打抜き加工する工程と、厚板
の両面を平面ならしする工程と、厚板の外形及び３個の
電子ビーム通過穴を所定寸法にシェービング加工する工
程とからなる電子銃用電極の製造方法。The process of forming predetermined coining pilot holes in the thick plate material at locations corresponding to three inline electron beam passage holes, and forming a concave surface of the desired depth on one side of the thick plate and the material by coining. a step of punching the outer shape of the thick plate or material into an outer shape larger than a predetermined dimension; a step of punching the coining pilot hole into an inner diameter larger than the coining pilot hole and smaller than the predetermined dimension; A method for manufacturing an electrode for an electron gun, which comprises the steps of leveling both sides of a plate, and shaving the outer shape of a thick plate and three electron beam passage holes to predetermined dimensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10830184A JPS60253128A (en) | 1984-05-30 | 1984-05-30 | Manufacture of electrode for electron gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10830184A JPS60253128A (en) | 1984-05-30 | 1984-05-30 | Manufacture of electrode for electron gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60253128A true JPS60253128A (en) | 1985-12-13 |
| JPH0568054B2 JPH0568054B2 (en) | 1993-09-28 |
Family
ID=14481217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10830184A Granted JPS60253128A (en) | 1984-05-30 | 1984-05-30 | Manufacture of electrode for electron gun |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60253128A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62285336A (en) * | 1986-06-04 | 1987-12-11 | Toshiba Corp | Manufacture of plate-shaped electrode of electron gun for electron tube |
-
1984
- 1984-05-30 JP JP10830184A patent/JPS60253128A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62285336A (en) * | 1986-06-04 | 1987-12-11 | Toshiba Corp | Manufacture of plate-shaped electrode of electron gun for electron tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0568054B2 (en) | 1993-09-28 |
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