JPS5840755A - Electron gun for color picture tube - Google Patents
Electron gun for color picture tubeInfo
- Publication number
- JPS5840755A JPS5840755A JP13811181A JP13811181A JPS5840755A JP S5840755 A JPS5840755 A JP S5840755A JP 13811181 A JP13811181 A JP 13811181A JP 13811181 A JP13811181 A JP 13811181A JP S5840755 A JPS5840755 A JP S5840755A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- electron
- opening holes
- holes
- apertures
- 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
- 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
- H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
- H01J29/503—Three or more guns, the axes of which lay in a common plane
Abstract
Description
【発明の詳細な説明】
本発明はインライン型カラー受像管用電子銃の電子レン
ズに於ける解像度の改善に関するものである。受像管用
電子銃の解像度特性は主とし【電子レンズの球面収差に
制約され、高解像度特性を得るためには主電子レンズを
構成する電極口径を大きくして電子レンズの球面収差を
小さくする必要がある。電子ビームの通過する三つの開
孔が一直線上に配列されたインライン型電子銃では、単
に主電子レンズ口径を大きくすれば開孔間距離である離
心距離が大きくなると共に、電子銃を配設する受像管ネ
ック径を大きくせねばならない。周知のように離心距離
の増大は二電子ビームを螢光面上全域にわたって一点に
集中させるコンバージェンス特性を劣化させ、ネック径
の増大は受像管の偏向電力の増大化となりいずれも望ま
しくない。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvement of resolution in an electron lens of an in-line color picture tube electron gun. The resolution characteristics of an electron gun for a picture tube are mainly limited by the spherical aberration of the electron lens. be. In an in-line electron gun in which three apertures through which the electron beam passes are arranged in a straight line, simply increasing the diameter of the main electron lens increases the eccentric distance between the apertures and also increases the distance between the apertures and the arrangement of the electron gun. The diameter of the picture tube neck must be increased. As is well known, an increase in the eccentric distance deteriorates the convergence characteristic of concentrating the two electron beams over the entire area of the fluorescent surface, and an increase in the neck diameter increases the deflection power of the picture tube, both of which are undesirable.
そこで第１図、第２図に示す様に、インライン型電子銃
の離心距離Ｓ１とネック径を変更することなく、主電子
レンズ構成電極の口径りを大きくする方法として、三つ
の開孔の離心距離Ｓ１以上の口径りを持った三つの開孔
を互に重畳してインライン配列する電極構造が提案され
ている。第１図は三つの開孔離心距離、Ｓ３以上の口径
りを持った開孔１１＆ ＩＩＧ、ＩＩＢが互に重畳され
てインライン配列された電極１１の上面図を示し、各開
孔、１ｘａ ＩＩＧ、ＩＩＢは独立した開孔を形成せず
重畳部が連続した連通孔となっており、隣接開孔境界に
は直線状仕切電極１２が設置されている。第２図は上記
構造の電極を集中電極Ｇ３と、陽極電極Ｇ４として互に
対向させてパイ・ボテンシャル・フォーカス方式主電子
レンズを形成した電子銃構体の側断面図を示す。この主
電子レンズは第１図に示す様に集束電極ｑ３、陽極電極
Ｇ４の各開孔が軸対称で独立した開孔でなく、開孔配列
方向である水平方向に直線部を持った欠円状となってい
るため、水平方向レンズ作用は垂直方向レンズ作用より
弱くなり、螢光面上のビームスポットは縦長状となり、
垂直方向解像度が損われる。特に中央開孔は水平方向の
両端に直線部を持りた欠円状となっているため両列側開
孔部で形成されるビームスポットより一層縦長状となり
、中央部主電子レンズの垂直解像度は両列側部主電子レ
ンズより更に劣化してしまう。本発明は上述の欠点に鑑
み°なされたもので、三つの開孔離心距離以上の口径を
持ってイ／−）イン配列された三つの重畳型開孔を備え
た少くとも一組の電極を互に対向させて主電子レンズを
形成した電子銃に於て、前記電極のいずれか一方の中央
開孔をその開孔径を持った完全円孔に、これに対向する
電極の内外側開孔をその開孔径を持った完全円孔に形成
し、重畳型開孔の隣接しない一方の不完全円孔には他方
の完全円孔な交互に対向させて、主電子レンズの解像度
特性を向上したカラー受像管用電子銃を提供するもので
ある。Therefore, as shown in Figures 1 and 2, as a method of increasing the aperture of the main electron lens constituent electrode without changing the eccentric distance S1 and neck diameter of the in-line electron gun, the eccentricity of the three apertures is An electrode structure has been proposed in which three apertures having a diameter of a distance S1 or more are arranged in-line by overlapping each other. FIG. 1 shows a top view of an electrode 11 in which three aperture eccentricities, apertures 11 & IIG, IIB having an aperture of S3 or more are superimposed on each other and arranged in-line, each aperture, 1xa IIG, IIB does not form independent openings, but is a continuous communication hole with an overlapping portion, and a linear partition electrode 12 is installed at the boundary between adjacent openings. FIG. 2 shows a side sectional view of an electron gun assembly in which the electrodes of the above structure are opposed to each other as a concentrated electrode G3 and an anode electrode G4 to form a main electron lens of the pi-potential focusing type. As shown in Fig. 1, this main electron lens has apertures in the focusing electrode q3 and the anode electrode G4 that are axially symmetrical and are not independent apertures, but instead are truncated circles with straight portions in the horizontal direction, which is the direction in which the apertures are arranged. Because of this, the horizontal lens action is weaker than the vertical lens action, and the beam spot on the fluorescent surface becomes vertically elongated.
Vertical resolution is lost. In particular, since the central aperture has a truncated circular shape with straight lines at both ends in the horizontal direction, the beam spot becomes more vertically elongated than the beam spot formed by the apertures on both rows, and the vertical resolution of the central main electron lens. is further deteriorated than the side main electron lenses in both rows. The present invention has been made in view of the above-mentioned drawbacks, and includes at least one set of electrodes having three superimposed apertures arranged in an array with an aperture having an aperture greater than or equal to the eccentricity of the three apertures. In an electron gun in which main electron lenses are formed by facing each other, the center hole of one of the electrodes is made into a perfect circular hole having the same hole diameter, and the inner and outer holes of the opposite electrodes are made into a completely circular hole having the same hole diameter. The color is formed into a perfect circular hole with the same diameter, and the non-adjacent incomplete circular holes of the overlapping type apertures are alternately opposed to the other perfect circular hole, thereby improving the resolution characteristics of the main electron lens. The present invention provides an electron gun for a picture tube.
以下図面に従がって本発明の一実施例を詳細に説明する
。説明の簡略化のために第２図の従来例と同様のバイ・
ポテンシャルＯフォーカス型主電子レンズに本願を適用
した場合について説明する。An embodiment of the present invention will be described in detail below with reference to the drawings. To simplify the explanation, a bi-
A case where the present application is applied to a potential O focus type main electron lens will be described.
即ち第３図（→は陽極電極２４に対向する集束電極２３
の上面図、（ロ）はその側断面図、第４図（ｍｌは陽極
電極２４の上面図、（ｂ）はその側断面図を夫々示す。That is, in FIG. 3 (→ indicates the focusing electrode 23 facing the anode electrode 24).
FIG. 4 (ml) is a top view of the anode electrode 24, and (b) is a side sectional view thereof.
集束電極２３は三つの開孔離心距離Ｓ１以上の口径り、
を持ってインライン配列された三つの開孔中、中央開孔
、２３ｑは高さり、を持った突状縁２３Ｈｃで連続して
囲まれた完全円孔であり、これに隣接した内外側開孔２
３Ｒ，２３Ｂは前記同一口径り、を持ち、インライン配
列方向の中央開孔２３Ｇ側の重畳分だけ欠円状で、高さ
ｈｌを持ち中央開孔の突状縁２３Ｈｃで切断された不連
続の突状縁２３Ｈｓで夫々囲まれた欠円状円孔となって
いる。集束電極２３に対向する陽極電極２４は三つの開
孔離心距離Ｓ１６以上の口径り、を持ってインライン配
列された三つの開孔中、内外側開孔２４Ｒ２４Ｂは高さ
り、を持った突状縁２４Ｈｓで連続して囲まれた完全円
孔であり、これに挾まれた中央開孔２４Ｇは口径り、を
持ち、例外側開孔２４Ｒ１２４Ｂ側の重畳分だけインラ
イン配列方向の両側は欠円状で、−高さり、を持ち、内
外側開孔の突状縁２４Ｈｓで切断された不連続の突状縁
２４Ｈｃで囲まれた欠円状円孔を形成している。ここに
陽極電極２４の離心距離Ｓ、は一般に集束電極２３の離
心距離Ｓ、より僅かに大きく、設定し陽極電極、２４０
両外例外側聞孔Ｒ，２４Ｂを集束電極２３の内外側開孔
２３Ｒ，２３Ｂより外側に偏位させて、対向する両列側
開孔部には新組等価傾斜レンズを形成し、両列側電子ビ
ームを画面***で中央電子ビームに静電気的に集中す
るようになっている。従がって陽穫電極２４の離心距離
Ｓ２．その口径り。The focusing electrode 23 has three apertures with an eccentric distance S1 or more,
Among the three apertures arranged in-line with 2
3R and 23B have the same diameter as described above, are occluded by the overlap on the central aperture 23G side in the inline arrangement direction, have a height hl, and are discontinuous circles cut by the protruding edge 23Hc of the central aperture. They are truncated circular holes each surrounded by a protruding edge 23Hs. The anode electrode 24 facing the focusing electrode 23 has three apertures arranged in-line with an eccentric distance of S16 or more, and the inner and outer apertures 24R24B have a raised protruding edge. It is a complete circular hole surrounded by 24Hs continuously, and the central opening 24G sandwiched between these has a diameter, and both sides in the inline arrangement direction are occluded by the overlap of the outer openings 24R and 124B. , -height, and forms an truncated circular hole surrounded by a discontinuous protruding edge 24Hc cut by the protruding edge 24Hs of the inner and outer openings. Here, the eccentric distance S of the anode electrode 24 is generally slightly larger than the eccentric distance S of the focusing electrode 23, and the anode electrode 240
Both the outer outer holes R and 24B are deviated outward from the inner and outer apertures 23R and 23B of the focusing electrode 23, and a new set of equivalent inclined lenses is formed in the openings on both row sides facing each other. The side electron beams are electrostatically concentrated into a central electron beam at the center of the screen. Therefore, the eccentric distance S2. Its caliber.
等が集束電極２３の離心距離ｓｓｅその口径Ｄｌ等と相
違するのは本発明の主旨とは関係がない。The fact that these are different from the eccentric distance sse of the focusing electrode 23, its aperture Dl, etc. is irrelevant to the gist of the present invention.
上述の構造を持った電極で構成された主電子レンズは従
来と同様に離心距離Ｓ、、Ｓ、を変更することなく、そ
の開孔ＤＩ−Ｄ！はインライン配列された開孔相互間距
離である離心距離以上の大きさの口径を持っているため
電子レンズの球面収差は小さい。本実施例では夫々の電
極に設置された重畳型開孔は隣接しない完全円孔の連続
した突状縁２３Ｈ４２４Ｈ８，で互に仕切られているた
め従来のように仕切１甑を隣接開孔境界に設置しなくて
も隣接開孔電界相互の干渉による電界の乱れは防止出来
る。The main electron lens composed of electrodes having the above-mentioned structure has its aperture DI-D! without changing the eccentric distance S,,S, as in the conventional case. Since the electron lens has an aperture larger than the eccentric distance, which is the distance between the apertures arranged in-line, the spherical aberration of the electron lens is small. In this example, the superimposed apertures installed in each electrode are separated from each other by continuous protruding edges 23H424H8 of non-adjacent complete circular holes. Even if it is not installed, it is possible to prevent disturbance of the electric field due to mutual interference between adjacent aperture electric fields.
更に本発明では重畳型開孔の隣接しない一方の不完全円
孔には対向する他方の完全円孔を組合せていることに最
大の特長がある。これによって重畳部が連続した連通孔
となって、隣接開孔境界に直線状仕切り電極を設置した
不完全円孔な対向させた場合の従来の欠点であったイン
ライン配列方向の欠内部により生じる水平、垂直方向レ
ンズ作用の不一致は互に補間補償されて一致させ得て、
非点集差を除去することが可能となる。従がって螢光面
上のビームスポットは円形状となり、垂直、水平方向の
解像度は同一となり解像度は著しく向上する。尚、上述
の突状縁２３Ｈｃ、２３Ｈｓ、２４Ｈｃ。Furthermore, the greatest feature of the present invention is that one non-adjacent incomplete circular hole of the overlapping type apertures is combined with the opposite complete circular hole. As a result, the overlapping part becomes a continuous communication hole, and a linear partition electrode is installed at the border of the adjacent hole. , mismatches in vertical lensing can be matched by mutual interpolation compensation,
It becomes possible to remove astigmatism. Therefore, the beam spot on the fluorescent surface becomes circular, and the resolution in the vertical and horizontal directions is the same, resulting in a marked improvement in resolution. In addition, the above-mentioned protruding edges 23Hc, 23Hs, and 24Hc.
２４Ｈｓの高さｈｌ、 ｈ、は隣接開孔に形成される電
界相互の干渉を防止するためにその開孔径Ｄ１． Ｄ。The height hl, h of 24Hs is determined by the aperture diameter D1.24Hs in order to prevent mutual interference of electric fields formed in adjacent apertures. D.
のバ以上あることが望ましい。又、本実施例では集束電
極２３の中央孔２３Ｇとこれに対向する陽極電極２４の
両列側孔２４Ｒ，２４Ｂを完全円孔としたが、この関係
を集束電極と陽極電極とで逆にしてもよい。本実施例で
はインライン配列方向の両端に重畳部を持つ中央開孔の
完全円孔を特に加速電界中の集束電極側に設置したため
、中央ビームの非点収差の改善はこれを陽極電極に実施
した場合より大きくなってい、例外側ビームと解像度特
性を同一にすることが可能となる。It is desirable that there be at least 1 bar. Furthermore, in this embodiment, the central hole 23G of the focusing electrode 23 and the opposite row side holes 24R, 24B of the anode electrode 24 are completely circular holes, but this relationship can be reversed between the focusing electrode and the anode electrode. Good too. In this example, a completely circular central hole with overlapping portions at both ends in the in-line arrangement direction was installed especially on the focusing electrode side in the accelerating electric field, so the astigmatism of the central beam was improved by implementing this on the anode electrode. This makes it possible to make the resolution characteristics the same as those of the outer beam.
上記の説明では本発明をバイ・ポテンシャル・フォーカ
ス方式電子銃に適用した場合について行なっだが、これ
に限定されることなく、三つの電極から栴成されるユニ
ｅボデンシャル・フォーカス方式電子銃その他の多段集
束電子銃に適用してもよいことは云うまでもない。In the above description, the present invention was applied to a bipotential focus type electron gun, but the present invention is not limited to this, and is applicable to a uni-ebodenial focus type electron gun formed from three electrodes and other multistage electron guns. Needless to say, the present invention may also be applied to a focused electron gun.
以上説明したように本発明によれば、インライン配列さ
れた開孔離心距離を変更することなく大口径開孔を持っ
た電子レンズを形成し、その球面収差、非点収差を除去
してインライン型カラー受像管の電子レンズ解像度特性
を著しく向−ヒさせることが可能となる。As explained above, according to the present invention, an electron lens with a large diameter aperture is formed without changing the eccentric distance of the inline arranged apertures, and its spherical aberration and astigmatism are removed. It becomes possible to significantly improve the resolution characteristics of the electron lens of a color picture tube.
第１図は三つの開孔離心距離以上の口径を持ち互に重畳
されてインライン配列された連通孔を持った従来の電極
の上面図、第２図は上記講造の電極を互に対向させてパ
イ・ポテンシャル・フォーカス方式電子レンズを形成し
た電子銃構体の側断面図、第３図（ａ）、 （ｂ）は本
発明の一実施例に基づく集束電極の上面図、側断面図、
第４図（ａ） 、’ら）は陽極電極の上面図、側断面図
を夫々示す。
１１・・・・・・従来の重畳型連通孔を持った電極、１
２・・・・・・仕切り電極、２３・・・・・・加速電極
、２４・・・・・・陽極電極、２３Ｇ、２４Ｒ，２４Ｂ
・・・・・・完全円状開孔、２３Ｒ，２３Ｂ、２４Ｇ・
・・・・・欠円状開孔。Figure 1 is a top view of a conventional electrode with communicating holes arranged in-line and overlapping each other with diameters greater than the eccentricity of three openings, and Figure 2 is a top view of the electrode of the above-mentioned Kozo structure, which is arranged in-line. 3(a) and 3(b) are a top view and a side sectional view of a focusing electrode according to an embodiment of the present invention.
Figures 4(a) and 4(a) show a top view and a side sectional view of the anode electrode, respectively. 11...Conventional electrode with overlapping communication holes, 1
2...Partition electrode, 23...Acceleration electrode, 24...Anode electrode, 23G, 24R, 24B
・・・・・・Complete circular hole, 23R, 23B, 24G・
...Cut circular hole.
Claims (1)
数の欠円状重畳型開孔を備えた少くとも一組の電極を互
に対向させて主電子レンズを形成する電子銃に於て、一
方の電極の隣接しない不完全円孔には他方の電極に形成
された完全円孔な交互に対向させたことを！橡とする力
２−受像管用電子銃。In an electron gun in which a main electron lens is formed by mutually opposing at least one set of electrodes each having a plurality of truncated circular overlapping apertures arranged in-line with an aperture greater than the distance between the apertures, The non-adjacent incomplete circular holes in one electrode are alternately opposed to the complete circular holes formed in the other electrode! Power to make 2 - Electron gun for picture tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13811181A JPS5840755A (en) | 1981-09-02 | 1981-09-02 | Electron gun for color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13811181A JPS5840755A (en) | 1981-09-02 | 1981-09-02 | Electron gun for color picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5840755A true JPS5840755A (en) | 1983-03-09 |
| JPS6319978B2 JPS6319978B2 (en) | 1988-04-26 |
Family
ID=15214205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13811181A Granted JPS5840755A (en) | 1981-09-02 | 1981-09-02 | Electron gun for color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5840755A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4626738A (en) * | 1983-08-05 | 1986-12-02 | U.S. Philips Corporation | Color display tube with electrostatic focusing lens |
| US4766344A (en) * | 1983-04-21 | 1988-08-23 | North American Philips Consumer Electronics Corp. | In-line electron gun structure for color cathode ray tube having oblong apertures |
-
1981
- 1981-09-02 JP JP13811181A patent/JPS5840755A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4766344A (en) * | 1983-04-21 | 1988-08-23 | North American Philips Consumer Electronics Corp. | In-line electron gun structure for color cathode ray tube having oblong apertures |
| US4626738A (en) * | 1983-08-05 | 1986-12-02 | U.S. Philips Corporation | Color display tube with electrostatic focusing lens |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6319978B2 (en) | 1988-04-26 |
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