JPH0341936B2 - - Google Patents
Info
- Publication number
- JPH0341936B2 JPH0341936B2 JP56166301A JP16630181A JPH0341936B2 JP H0341936 B2 JPH0341936 B2 JP H0341936B2 JP 56166301 A JP56166301 A JP 56166301A JP 16630181 A JP16630181 A JP 16630181A JP H0341936 B2 JPH0341936 B2 JP H0341936B2
- Authority
- JP
- Japan
- Prior art keywords
- grid
- electron beam
- electrode
- electron
- electron gun
- 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 - Lifetime
Links
- 238000010894 electron beam technology Methods 0.000 claims description 40
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 16
- 238000010586 diagram Methods 0.000 description 11
- 230000006866 deterioration Effects 0.000 description 7
- 206010010071 Coma Diseases 0.000 description 6
- 201000009310 astigmatism Diseases 0.000 description 6
- 230000005684 electric field Effects 0.000 description 6
- 230000004075 alteration Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000009826 distribution Methods 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
- H01J29/50—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
Description
【発明の詳細な説明】
本発明は電子銃構体に係り、特にカラー受像管
に装着される３本の電子銃を一列配設させた所謂
インライン形のカラー受像管用電子銃構体に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electron gun assembly, and more particularly to a so-called in-line type electron gun assembly for a color picture tube in which three electron guns mounted on a color picture tube are arranged in a row.
インライン形の電子銃構体を装着したインライ
ン形カラー受像管には非斉一な偏向磁界を有する
偏向ヨークが使用されるため、通常のカラー受像
管に比較して電子ビームの非点収差、コマ収差の
ため蛍光スクリーン上のフオーカス特性が劣化す
る場合が多い。 An in-line color picture tube equipped with an in-line electron gun structure uses a deflection yoke with a non-uniform deflection magnetic field, so compared to a normal color picture tube, there is less astigmatism and coma in the electron beam. Therefore, the focus characteristics on the fluorescent screen often deteriorate.
このようなインライン形の電子銃構体の１個の
電子銃１の一例は第１図に示すように陰極２、第
１グリツド３、第２グリツド４からなる３極部
と、第３グリツド５、第４グリツド６、第５グリ
ツド７、第６グリツド８からなる主レンズ部とか
らなり、これら陰極２乃至第６グリツド８が銃軸
Ｚに沿つてそれぞれ所定間隔をもつように配設さ
れ、第４グリツド６が第２グリツド４に接続され
ると共に、第５グリツド７が第３グリツドに接続
され、ステム９2のステムピン９1を介して所定の
電圧が印加されるようになつている。 As shown in FIG. 1, an example of one electron gun 1 having such an in-line type electron gun structure has a three-pole section consisting of a cathode 2, a first grid 3, and a second grid 4, a third grid 5, and a third grid 5. The main lens part consists of a fourth grid 6, a fifth grid 7, and a sixth grid 8, and these cathodes 2 to 6 are arranged at predetermined intervals along the gun axis Z. The fourth grid 6 is connected to the second grid 4, the fifth grid 7 is connected to the third grid, and a predetermined voltage is applied through the stem pin 91 of the stem 92 .
この様な電子銃構体においては、第３グリツド
５、第４グリツド６、第５グリツド７により形成
されるユニポテンシヤル形の補助レンズ１０2に
より電子ビームを多少集束すると共に、その集束
された電子ビームを第５グリツド７と第６グリツ
ド８とにより形成されるバイポテンシヤル形の主
レンズ１０1の収差のない中央部を通過させるこ
とにより、電子レンズの収差による電子ビームの
球面収差及び偏向磁界収差による蛍光スクリーン
周辺のフオーカス特性の劣化を減少させる特性の
良好な電子銃構体としている。 In such an electron gun structure, the electron beam is somewhat focused by the unipotential type auxiliary lens 102 formed by the third grid 5, the fourth grid 6, and the fifth grid 7, and the focused electron beam is By passing through the aberration-free center of the bipotential main lens 101 formed by the fifth grid 7 and the sixth grid 8, the spherical aberration of the electron beam due to the aberration of the electron lens and the deflection magnetic field aberration are eliminated. The electron gun structure has excellent characteristics that reduce deterioration of focus characteristics around the fluorescent screen.
然しながら実際に補助レンズ１０2を強くする
為の手段としては、第３グリツド５、第４グリツ
ド６及び第５グリツド７からなるユニポテンシヤ
ル部において、第４グリツド６の長さを長くする
かまたは電極間の距離を拡げる必要があり、この
ようにしてはじめて蛍光スクリーン周辺における
フオーカス特性の劣化を軽減することができる。
しかし、補助レンズ１０2の強さは単独には設計
できない欠点がある。すなわち構造形状の面から
だけでなく、第３グリツド５及び第５グリツド７
に付与する電圧を第４グリツド６に対して高くす
る必要があるが、この電圧はステム９2から与え
ることが必要であり、あまり高い電圧にすること
はステム９2での耐圧が問題となり好ましくない。
また電極配置や印加電圧を変えることなく、蛍光
スクリーン周辺のフオーカス劣化を軽減する方法
として、電子銃構体の３極部及び主レンズ部を形
成するグリツドの電子ビーム通過孔部を非円形と
すると構造が考えられているが、電子ビーム通過
孔部を非円形にすると組み立て精度が劣化する
し、また非円形の管理が困難であり、量産性に乏
しい欠点がある。 However, as a means to actually strengthen the auxiliary lens 102 , in the unipotential section consisting of the third grid 5, fourth grid 6, and fifth grid 7, the length of the fourth grid 6 can be increased or It is necessary to widen the distance between the fluorescent screens, and only in this way can deterioration of focus characteristics around the fluorescent screen be alleviated.
However, the strength of the auxiliary lens 10 2 has a drawback that it cannot be designed independently. In other words, not only from the viewpoint of structural shape, but also from the viewpoint of the third grid 5 and the fifth grid 7.
It is necessary to make the voltage applied to the fourth grid 6 higher than that of the fourth grid 6, but this voltage needs to be applied from the stem 92 , and it is preferable not to make the voltage too high because the withstand voltage at the stem 92 will become a problem. do not have.
In addition, as a method to reduce focus deterioration around the fluorescent screen without changing the electrode arrangement or applied voltage, it is possible to make the electron beam passage hole of the grid forming the three poles and main lens part of the electron gun structure non-circular. However, if the electron beam passage hole is made non-circular, assembly accuracy will deteriorate, and control of non-circularity will be difficult, resulting in poor mass productivity.
本発明は、前述した問題点に鑑みなされたもの
であり、耐圧や組み立て精度の劣化などの量産性
を阻害することなく、蛍光スクリーン周辺の非点
収差、コマ収差などによるフオーカス特性の劣化
を軽減することが可能なカラー受像管用電子銃構
体を提供することを目的としている。 The present invention was made in view of the above-mentioned problems, and reduces the deterioration of focus characteristics caused by astigmatism, coma, etc. around the fluorescent screen without hindering mass production such as deterioration of withstand voltage or assembly accuracy. An object of the present invention is to provide an electron gun assembly for a color picture tube that can be used in a color picture tube.
次に本発明のカラー受像管用電子銃構体の第１
の実施例を第２図乃至第７図により説明する。 Next, the first part of the electron gun assembly for a color picture tube according to the present invention is
An example of this will be explained with reference to FIGS. 2 to 7.
即ち、電子銃構体２１は第２図に示すように陰
極２２、第１グリツド２３、第２グリツド２４か
らなる３極部と、第３グリツド２５、第４グリツ
ド２６、第５グリツド２７、第６グリツド２８か
らなる主レンズ部とからなり、これら陰極２２乃
至第６グリツド２８が銃軸Ｚに沿つてそれぞれ所
定間隔をもつように配設され、第４グリツド２６
が第２グリツド２４に接続され、また第５グリツ
ド２７が第３グリツド２５に接続され、ステム２
９2のステムピン２９1を介して所定の電圧が印加
されるようになつている。そして第３グリツド２
５、第４グリツド２６および第５グリツド２７に
よりユニポテンシヤル形の補助レンズ３０2が、
また第５グリツド２７と第６グリツド２８とによ
りバイポテンシヤル形の主レンズ３０1を構成す
るようになつていることは第１図の電子銃構体１
とほぼ同様であるが、本実施例においては、第６
グリツド２８に対設する第５グリツド２７の電極
２７1の構造を第３図乃至第５図のようにしたこ
とを特徴としている。 That is, as shown in FIG. 2, the electron gun assembly 21 has a three-pole section consisting of a cathode 22, a first grid 23, and a second grid 24, a third grid 25, a fourth grid 26, a fifth grid 27, and a sixth grid. The cathode 22 to the sixth grid 28 are arranged at predetermined intervals along the gun axis Z, and the fourth grid 26
is connected to the second grid 24, and the fifth grid 27 is connected to the third grid 25, and the stem 2
A predetermined voltage is applied via the stem pin 29 1 of 9 2 . and third grid 2
5. A unipotential type auxiliary lens 30 2 is formed by the fourth grid 26 and the fifth grid 27.
Furthermore, the fact that the fifth grid 27 and the sixth grid 28 form a bipotential main lens 301 is similar to that of the electron gun assembly 1 in FIG.
However, in this example, the sixth
The structure of the electrode 271 of the fifth grid 27 opposite to the grid 28 is as shown in FIGS. 3 to 5.
即ち、第５グリツド２７の第６グリツド２８に
対設する皿状の電極２７1は３本の電子ビームに
対して一体構造となつており、水平方向（Ｘ−
Ｘ）に沿つて３個の円形の電子ビーム通過孔部３
１を有すると共に、この電子ビーム通過孔部３１
を中心とし、垂直方向（Ｙ−Ｙ）に長手を有する
ほぼ楕円状の所定深さ３４の段差部３２が底部３
３より銃軸Ｚ方向に対設する第６グリツド２８よ
り離れるようにプレスのコイニング加工により設
けられたものとなつている。即ち、段差部３２は
水平方向（Ｘ−Ｘ）については、電子ビーム通過
孔３１の径と同じ幅となつているので設けられ
ず、垂直方向（Ｙ−Ｙ）のみに設けられている。 That is, the dish-shaped electrode 271 of the fifth grid 27 opposite to the sixth grid 28 has an integral structure with respect to the three electron beams, and is oriented in the horizontal direction (X-
Three circular electron beam passing holes 3 along X)
1, and this electron beam passage hole 31
A substantially elliptical stepped portion 32 having a predetermined depth 34 and having a longitudinal direction in the vertical direction (Y-Y) is located at the bottom 3.
3, it is provided by a coining process of a press so as to be separated from the sixth grid 28 which is oppositely provided in the Z direction of the gun axis. That is, the stepped portion 32 is not provided in the horizontal direction (X-X) because it has the same width as the diameter of the electron beam passage hole 31, but is provided only in the vertical direction (Y-Y).
このような段差部３２を設けることにより、垂
直方向（Ｙ−Ｙ）における第６グリツド２８と第
５グリツド２７の電極２７1の間に形成される電
界３８は第６図に示すように全体としてなだらか
になり、電子ビームに対する効果は第５グリツド
２７側が弱い集束効果を与え、第６グリツド２８
側が弱い発散効果を与えるのに対し、水平方向
（Ｘ−Ｘ）における第６グリツド２８と第５グリ
ツド２７の電極２７1の間に形成される電界３９
は第７図に示すように全体として急になり、電子
ビームに対する効果は第５グリツド２７側が強い
集束効果を与え、第６グリツド２８側は第６図と
ほぼ等しい発散効果を与えることになる。従つ
て、このような電界３８，３９により形成される
主レンズ通過する電子ビームは水平方向（Ｘ−
Ｘ）より垂直方向（Ｙ−Ｙ）の集束角が小さくな
る非対称な集束電子ビームとすることが可能とな
る。すなわちこのような電子ビームは偏向磁界に
よる非点収差、コマ収差を補償する有効な形状を
なす。そしてこの補償効果は段差部３２の深さや
形状などにより変化調整することが可能であるの
で、カラー受像管の管種により、それに適した段
差部３２を設けることにより、高品位のカラー受
像管を得ることが可能である。 By providing such a stepped portion 32, the electric field 38 formed between the electrodes 271 of the sixth grid 28 and the fifth grid 27 in the vertical direction (Y-Y) is reduced as a whole as shown in FIG. The effect on the electron beam is that the fifth grid 27 side has a weak focusing effect, and the sixth grid 28 side has a weak focusing effect.
The electric field 39 formed between the electrodes 27 1 of the sixth grid 28 and the fifth grid 27 in the horizontal direction (X-X)
As shown in FIG. 7, the angle becomes steep as a whole, and the effect on the electron beam is that the fifth grid 27 side gives a strong focusing effect, and the sixth grid 28 side gives a diverging effect almost the same as that in FIG. Therefore, the electron beam passing through the main lens formed by such electric fields 38 and 39 is directed in the horizontal direction (X-
It is possible to obtain an asymmetric focused electron beam in which the focusing angle in the vertical direction (YY) is smaller than that in the vertical direction (Y-Y). That is, such an electron beam has an effective shape that compensates for astigmatism and coma aberration caused by the deflection magnetic field. This compensation effect can be varied and adjusted by changing the depth and shape of the stepped portion 32, so by providing a step portion 32 suitable for the type of color picture tube, a high-quality color picture tube can be manufactured. It is possible to obtain.
また、前記実施例は第２図に示す構造の電子銃
構体の第５グリツド２７の電極２７1を使用した
が、必ずしもこれに限定するものではなく、主レ
ンズ部を構成するグリツドのうち集束電界を形成
するグリツドの電子ビーム通過孔部には全て用い
ることができるし、さらに複数個組み合せて使用
してもよい。 Further, in the above embodiment, the electrode 271 of the fifth grid 27 of the electron gun assembly having the structure shown in FIG. 2 was used, but the invention is not necessarily limited to this. All of them can be used for the electron beam passage holes of the grid forming the grid, or a plurality of them can be used in combination.
以上説明したように、本実施例の電子銃構体を
使用することにより、非点収差やコマ収差が原因
である蛍光スクリーン周辺部におけるフオーカス
特性の劣化を軽減できるし、また、電子ビーム通
過孔部は円形状となつているので、組み立て精度
の劣化や量産性に乏しいなどの欠点を除去するこ
とが可能である。 As explained above, by using the electron gun structure of this embodiment, it is possible to reduce the deterioration of focus characteristics in the peripheral area of the fluorescent screen caused by astigmatism and coma, and also to Since it has a circular shape, it is possible to eliminate drawbacks such as deterioration in assembly accuracy and poor mass productivity.
次に、本発明の第２の実施例に適応する電極を
第８図により説明する。図中、第１の実施例と同
一符号は同一部分を示し、特に説明を行なわな
い。 Next, an electrode adapted to the second embodiment of the present invention will be explained with reference to FIG. In the figure, the same reference numerals as in the first embodiment indicate the same parts, and no particular explanation will be given.
即ち、本実施例に適応する電極３７は、垂直方
向（Ｙ−Ｙ）に扇形の段差部４２を設けたことを
特徴としている。このような段差部４２を設ける
と底部３３と段差部４２との境界部４２1に対応
する電界の乱れが多少考えられるが、電子ビーム
を電子ビーム通過孔部３１のほぼ中心を通過させ
ることによりこの電界の乱れは実質的に問題とは
ならないし、また段差部４２が円形の一部から構
成されているので製造工程も簡単になる。 That is, the electrode 37 adapted to this embodiment is characterized by having a fan-shaped stepped portion 42 in the vertical direction (Y-Y). If such a stepped portion 42 is provided, there may be some disturbance in the electric field corresponding to the boundary portion 42 1 between the bottom portion 33 and the stepped portion 42 , but by allowing the electron beam to pass through approximately the center of the electron beam passage hole 31 , This disturbance of the electric field does not substantially pose a problem, and since the stepped portion 42 is formed from a circular portion, the manufacturing process is also simplified.
次に、本発明の第３の実施例に適応する電極を
第９図及び第１０図により説明する。図中第１の
実施例と同一符号は同一部分を示し、特に説明し
ない。 Next, an electrode adapted to the third embodiment of the present invention will be explained with reference to FIGS. 9 and 10. In the figure, the same reference numerals as those in the first embodiment indicate the same parts, and no particular explanation will be given.
即ち、本実施例に適応する電極４７は底部３３
に円形の電子ビーム通過孔部３１が穿設された皿
状の電極部品４７ａ上に楕円形の通孔部４８が設
けられた板状の電極部品４７ｂを固定して、この
楕円形の通孔部４８と電子ビーム通過孔部３１の
間に段差部５２と設けたものであり、従来のもの
に板状の電極４７ｂを設け、段差部５２と肉厚部
５３を設ければよいので製造が簡単である。 That is, the electrode 47 adapted to this embodiment is attached to the bottom part 33.
A plate-shaped electrode part 47b having an oval through-hole part 48 is fixed on a dish-shaped electrode part 47a having a circular electron beam passing hole part 31 therein. A step portion 52 is provided between the portion 48 and the electron beam passage hole portion 31, and manufacturing is simplified by simply providing a plate-shaped electrode 47b and providing the step portion 52 and the thick portion 53 in the conventional electrode. It's easy.
次に本発明の第４の実施例に適応する電極を第
１１図及び第１２図により説明する。図中第１の
実施例と同一符号は同一部分を示し、特に説明し
ない。 Next, an electrode adapted to the fourth embodiment of the present invention will be explained with reference to FIGS. 11 and 12. In the figure, the same reference numerals as those in the first embodiment indicate the same parts, and no particular explanation will be given.
即ち、本実施例に適応する電極５７は底部３３
に円形の電子ビーム通過孔部３１が穿設された皿
状の電極部品５７ａの底部３３の電子ビーム通過
孔部３１間および両側電子ビーム通過孔部３１の
外側に垂直方向（Ｙ−Ｙ）に沿つて長手を有する
長方形状の部材により肉厚部５７ｂを設け、この
肉厚部５７ｂの長手方向の側壁をそれぞれ電子ビ
ーム通過孔部３１の水平方向（Ｘ−Ｘ）の径にほ
ぼ接するようにしたことを特徴としている。 That is, the electrode 57 adapted to this embodiment is located at the bottom 33.
A circular electron beam passing hole 31 is formed between the electron beam passing holes 31 on the bottom 33 of the dish-shaped electrode component 57a and on the outside of the electron beam passing holes 31 on both sides in the vertical direction (Y-Y). A thick wall portion 57b is provided by a rectangular member having a longitudinal direction along the longitudinal direction, and the longitudinal side walls of the thick wall portion 57b are arranged so as to be substantially in contact with the diameter of the electron beam passage hole portion 31 in the horizontal direction (X-X). It is characterized by what it did.
この様な構造にすることにより、従来の電極部
５７ｂに単に長方形状の部材からなる肉厚部５７
ｂを設けるだけで本発明の目的をはたすことが出
来るので製造が最も簡単になる。 By adopting such a structure, the thick part 57 simply made of a rectangular member is added to the conventional electrode part 57b.
Since the object of the present invention can be achieved by simply providing b, manufacturing is the simplest.
次に本発明の第５の実施例に適応する電極を第
１３図乃至第１５図により説明する。図中第１の
実施例と同一符号は同一部分を示し、特に説明し
ない。 Next, an electrode adapted to the fifth embodiment of the present invention will be explained with reference to FIGS. 13 to 15. In the figure, the same reference numerals as those in the first embodiment indicate the same parts, and no particular explanation will be given.
即ち、本実施例に適応する電極６７は前述した
各実施例とは異なる厚さの厚い板状からなり、こ
の電極６７に第１の実施例と同様に電子ビーム通
過孔部３１と段差部６２を設けたものであり、作
用効果は他の実施例と同様である。 That is, the electrode 67 adapted to this embodiment has a thick plate shape with a thickness different from that of the above-mentioned embodiments, and the electrode 67 has an electron beam passage hole 31 and a stepped section 62 as in the first embodiment. The operation and effect are the same as those of the other embodiments.
上述した実施例は第２図に示したユニポテンシ
ヤル形の補助レンズとバイポテンシヤル形の主レ
ンズを有する電子銃構体について述べてたが、こ
れは通常のバイポテンシヤル形またはユニポテン
シヤル形の主レンズを有する電子銃構体にもその
まま適用出来ることは勿論である。 In the above embodiment, the electron gun assembly has a unipotential type auxiliary lens and a bipotential type main lens as shown in FIG. Of course, the present invention can also be applied to an electron gun assembly having the present invention.
また前述した第１乃至第５の実施例において
は、電子ビームに集束作用を与える電子ビーム通
過孔部を有し、主レンズを構成する少なくとも１
個の電極の電子ビーム通過孔部の近傍をこの電子
ビーム通過孔部を通過する電子ビームの垂直方向
と水平方向での集束効果を変える構造にしたもの
について述べたが、同様な効果が得られる構造と
して、例えば第２図の第６グリツド２８に適用す
る場合には、第１乃至第５の実施例の如く電子ビ
ーム通過孔部の水平方向を高く、垂直方向を低く
する代りに、水平方向を低く、垂直方向を高くす
ること、即ち、各実施例の段差部や肉厚部を90゜
回転することにより電子ビームの発散作用を水平
方向に対して垂直方向に強くして、実質的に電子
ビームの垂直方向の集束角を水平方向の集束角よ
り小さくすることが可能となり、偏向磁界による
非点収差やコマ収差を補償することができる。 Further, in the first to fifth embodiments described above, at least one of the main lenses has an electron beam passage hole that focuses the electron beam.
We have described a structure in which the vicinity of the electron beam passage hole of each electrode is structured to change the focusing effect in the vertical and horizontal directions of the electron beam passing through the electron beam passage hole, but the same effect can be obtained. For example, when applying the structure to the sixth grid 28 in FIG. 2, instead of making the electron beam passage hole higher in the horizontal direction and lower in the vertical direction as in the first to fifth embodiments, By rotating the stepped portions and thick portions of each embodiment by 90 degrees, the divergence effect of the electron beam is strengthened in the vertical direction relative to the horizontal direction, and the effect is substantially reduced. It becomes possible to make the vertical focusing angle of the electron beam smaller than the horizontal focusing angle, and it is possible to compensate for astigmatism and coma due to the deflection magnetic field.
また、前述した電子レンズの集束作用を与える
側を第１乃至第５の実施例のようにすると共に、
発散作用を与える側を前述した如く第１乃至第５
実施例を90゜回転させたものを使用してもよいこ
とは勿論である。また、少くとも一方を複数個使
用するか、両方の対を複数組使用してもよい。更
にユニタイズ型などの一体構造ばかりでなく独立
構造の電子銃構体にもそのまま適用できる。 In addition, the side that provides the focusing effect of the electron lens described above is made as in the first to fifth embodiments, and
As mentioned above, the side that gives the divergent effect is the first to fifth side.
Of course, the embodiment may be rotated by 90 degrees. Furthermore, at least a plurality of one of them may be used, or a plurality of pairs of both may be used. Furthermore, it can be applied directly to not only integral structures such as unitized types but also independent structures of electron gun structures.
以上のように本発明の電子銃構体は電子ビーム
通過孔部は円形であつて、主レンズを形成する複
数個のグリツドのうち、少なくとも１個のグリツ
ドに電子ビームに特定の集束作用を与える構造ま
たは特定の発散作用を与える構造にしことによ
り、電子ビームの垂直方向をアンダーフオーカス
状態にして電子ビームの集束角を小さくすること
により、蛍光スクリーン周辺部の非点収差やコマ
収差を軽減し、にじみを低減させることができる
ので、その工業的価値は極めて大である。 As described above, the electron gun structure of the present invention has a structure in which the electron beam passage hole is circular and gives a specific focusing effect to the electron beam on at least one grid among the plurality of grids forming the main lens. Or, by creating a structure that provides a specific diverging effect, the vertical direction of the electron beam is underfocused and the convergence angle of the electron beam is reduced, thereby reducing astigmatism and coma at the periphery of the fluorescent screen. Since bleeding can be reduced, its industrial value is extremely large.
第１図は電子銃構体の一例を示す簡略説明図、
第２図乃至第７図は本発明の電子銃構体の第１の
実施例を示す図であり、第２図は簡略説明図、第
３図は第２図の第５グリツドの第６グリツドに対
設する電極を示す平面図、第４図は第３図をＹ−
Ｙ線に沿つて切断して見た断面図、第５図は第３
図をＸ−Ｘ線に沿つて切断して見た断面図、第６
図及び第７図は第５グリツドと第６グリツド間の
電界分布を示す図であり、第６図は垂直方向を示
す説明図、第７図は水平方向を示す説明図、第８
図は本発明の第２の実施例に適用する電極の平面
図、第９図及び第１０図は本発明の第３の実施例
に適用する電極を示す図であり、第９図は平面
図、第１０図は第９図をＹ−Ｙ線に沿つて切断し
て見た断面図、第１１図及び第１２図は本発明の
第４の実施例に適用する電極を示す図であり、第
１１図は平面図、第１２図は第１１図をＸ−Ｘ線
に沿つて切断して見た断面図、第１３図乃至第１
５図は本発明の第５の実施例に適用する電極を示
す図であり、第１３図は平面図、第１４図は第１
３図をＹ−Ｙ線に沿つて切断して見た断面図、第
１５図は第１３図をＸ−Ｘ線に沿つて切断して見
た断面図である。
２，２２…陰極、３，２３……第１グリツド、
４，２４…第２グリツド、５，２５…第３グリツ
ド、６，２６…第４グリツド、７，２７…第５グ
リツド、８，２８…第６グリツド、３１…電子ビ
ーム通過孔部、２７，３７，４７，５７，６７…
電極、３２，４２，５２，６２…段差部、３３…
底部、５３，５７ｂ…肉厚部。
FIG. 1 is a simplified explanatory diagram showing an example of an electron gun structure;
2 to 7 are diagrams showing the first embodiment of the electron gun assembly of the present invention, FIG. 2 is a simplified explanatory diagram, and FIG. 3 is a diagram showing the sixth grid of the fifth grid in FIG. A plan view showing the opposing electrodes, FIG. 4 is a Y-
A cross-sectional view taken along the Y line, Figure 5 is the 3rd
Sectional view taken along the line X-X, No. 6
7 and 7 are diagrams showing the electric field distribution between the fifth grid and the sixth grid, FIG. 6 is an explanatory diagram showing the vertical direction, FIG. 7 is an explanatory diagram showing the horizontal direction, and FIG.
The figure is a plan view of the electrode applied to the second embodiment of the present invention, and FIGS. 9 and 10 are diagrams showing the electrode applied to the third embodiment of the present invention, and FIG. 9 is a plan view. , FIG. 10 is a cross-sectional view of FIG. 9 taken along the Y-Y line, and FIGS. 11 and 12 are diagrams showing electrodes applied to the fourth embodiment of the present invention. Fig. 11 is a plan view, Fig. 12 is a cross-sectional view of Fig. 11 taken along the line X-X, and Fig. 13 to 1
FIG. 5 is a diagram showing an electrode applied to the fifth embodiment of the present invention, FIG. 13 is a plan view, and FIG. 14 is a diagram showing the first embodiment.
3 is a cross-sectional view taken along the line Y--Y, and FIG. 15 is a cross-sectional view taken along the line X--X of FIG. 13. 2, 22... cathode, 3, 23... first grid,
4, 24...second grid, 5,25...third grid, 6,26...fourth grid, 7,27...fifth grid, 8,28...sixth grid, 31...electron beam passage hole, 27, 37, 47, 57, 67...
Electrode, 32, 42, 52, 62...Stepped portion, 33...
Bottom part, 53, 57b...thick part.
Claims (1)
３極部と、この３極部からの電子ビームを集束さ
せる複数個のグリツドからなる主レンズ部とを有
するカラー受像管用電子銃構体において、前記主
レンズ部を構成する複数個のグリツドのうち少な
くとも１個のグリツドが、複数の円形通孔部と、
この円形通孔部の周辺部にこの周辺部の垂直方向
と水平方向の断面の肉厚を異ならせて前記通孔部
を通過する電子ビームに対して垂直方向と水平方
向の集束角を異ならせるように垂直方向または水
平方向に設けられた段差部または肉厚部とを有す
ることを特徴とするカラー受像管用電子銃構体。1. An electron gun assembly for a color picture tube having a triode section consisting of a cathode, a first grid, and a second grid, and a main lens section consisting of a plurality of grids that focus an electron beam from the triode section. At least one of the plurality of grids constituting the lens portion has a plurality of circular through holes;
The thickness of the cross section in the vertical direction and the horizontal direction of the peripheral part of this circular hole is made different, so that the convergence angle in the vertical and horizontal directions for the electron beam passing through the hole is made different. 1. An electron gun assembly for a color picture tube, characterized in that it has a stepped portion or a thick portion provided in a vertical or horizontal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16630181A JPS5868848A (en) | 1981-10-20 | 1981-10-20 | Structure of electron gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16630181A JPS5868848A (en) | 1981-10-20 | 1981-10-20 | Structure of electron gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5868848A JPS5868848A (en) | 1983-04-23 |
| JPH0341936B2 true JPH0341936B2 (en) | 1991-06-25 |
Family
ID=15828804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16630181A Granted JPS5868848A (en) | 1981-10-20 | 1981-10-20 | Structure of electron gun |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5868848A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4614894A (en) * | 1982-12-06 | 1986-09-30 | Hitachi Ltd. | Electron gun for color picture tube |
| US4535266A (en) * | 1983-05-02 | 1985-08-13 | North American Philips Consumer Electronics Corp. | In-line electron gun structure for color cathode ray tube having tapered walls and elongated apertures for beam spot-shaping |
| US4520292A (en) * | 1983-05-06 | 1985-05-28 | Rca Corporation | Cathode-ray tube having an asymmetric slot formed in a screen grid electrode of an inline electron gun |
| JPS59211945A (en) * | 1983-05-18 | 1984-11-30 | Hitachi Ltd | Electron gun for color picture tube |
| US4584500A (en) * | 1983-07-29 | 1986-04-22 | North American Philips Consumer Electronics Corp. | Electron gun integral beam correctors in a color cathode ray tube |
| US4583024A (en) * | 1984-02-21 | 1986-04-15 | Rca Corporation | Color picture tube having an inline electron gun with built-in stigmator |
| KR900001707B1 (en) * | 1987-05-26 | 1990-03-19 | 삼성전관 주식회사 | Eletron gun of color crt |
| KR910007654Y1 (en) * | 1988-11-02 | 1991-09-30 | 삼성전관 주식회사 | Electron gun of multi-step focusing crt |
| US5202604A (en) * | 1990-05-08 | 1993-04-13 | Samsung Electron Devices Co., Ltd. | Electron gun for cathode ray tube |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5185667A (en) * | 1975-01-24 | 1976-07-27 | Matsushita Electronics Corp | KARAAJUZO KANSOCHI |
| JPS5245259A (en) * | 1975-10-07 | 1977-04-09 | Matsushita Electronics Corp | Color picture tube device |
-
1981
- 1981-10-20 JP JP16630181A patent/JPS5868848A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5185667A (en) * | 1975-01-24 | 1976-07-27 | Matsushita Electronics Corp | KARAAJUZO KANSOCHI |
| JPS5245259A (en) * | 1975-10-07 | 1977-04-09 | Matsushita Electronics Corp | Color picture tube device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5868848A (en) | 1983-04-23 |
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