JP2796104B2 - Electron gun for color picture tube - Google Patents
Electron gun for color picture tubeInfo
- Publication number
- JP2796104B2 JP2796104B2 JP767489A JP767489A JP2796104B2 JP 2796104 B2 JP2796104 B2 JP 2796104B2 JP 767489 A JP767489 A JP 767489A JP 767489 A JP767489 A JP 767489A JP 2796104 B2 JP2796104 B2 JP 2796104B2
- Authority
- JP
- Japan
- Prior art keywords
- electron beam
- electrode
- focusing electrode
- electron
- passage hole
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、カラー受像管の螢光体スクリーンの全域に
おいて高い解像度と良好なコンバーゼンス特性が得られ
る電子レンズ構成を備えたカラー受像管用電子銃に関す
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electron gun for a color picture tube having an electron lens structure capable of obtaining high resolution and good convergence characteristics over the entire phosphor screen of the color picture tube. About.
受像管の解像度は、電子ビームスポット径およびその
形状に大きく依存する。すなわち、電子ビームの射突に
よって螢光体スクリーン面上に生成される輝点である電
子ビームスポットが径小でかつ真円に近いものでなけれ
ば、高い解像度が得られない。The resolution of the picture tube greatly depends on the electron beam spot diameter and its shape. In other words, high resolution cannot be obtained unless the electron beam spot, which is a luminescent spot generated on the phosphor screen surface by the impact of the electron beam, is small in diameter and close to a perfect circle.
しかし、電子銃から螢光体スクリーン面に至る電子ビ
ーム軌道は電子ビームの偏向角度の増大に伴って長大と
なるので、螢光体スクリーン面の中央部において径小で
かつ真円の電子ビームスポットが得られる最適フォーカ
ス電圧に保つと、螢光体スクリーン面の周辺部ではオー
バフォーカスの状態となり、周辺部において良好な電子
ビームスポットおよび高い解像度を得ることができなく
なる。However, since the trajectory of the electron beam from the electron gun to the phosphor screen becomes longer as the deflection angle of the electron beam increases, the diameter of the electron beam spot at the center of the phosphor screen is small and a perfect circle. When the focus voltage is maintained at the optimum value, the peripheral portion of the phosphor screen surface is over-focused, so that a favorable electron beam spot and high resolution cannot be obtained in the peripheral portion.
そこで、電子ビームの偏向角度の増大に伴ってフォー
カス電圧を高め、主レンズ電界を弱める、いわゆるダイ
ナミックフォーカス方式が採用されているのであるが、
この方式は以下に説明するように、インライン型カラー
受像管の駆動には適しない。Therefore, a so-called dynamic focus method is adopted, in which the focus voltage is increased with the increase in the deflection angle of the electron beam and the main lens electric field is weakened.
This method is not suitable for driving an in-line type color picture tube as described below.
すなわち、３つの電子ビーム出射部を水平走査方向一
直線上に配列してなるインライン型カラー受像管では、
セルフコンバーゼンス効果を得るために水平偏向磁界分
布をピンクッション状に、垂直偏向磁界分布をバレル状
に、それぞれ歪ませているので、ここを通過した電子ビ
ームの断面形状は非円形に歪む。That is, in an in-line type color picture tube in which three electron beam emitting portions are arranged on a straight line in the horizontal scanning direction,
Since the horizontal deflection magnetic field distribution is distorted in a pincushion shape and the vertical deflection magnetic field distribution is distorted in a barrel shape to obtain a self-convergence effect, the cross-sectional shape of the electron beam passing therethrough is distorted in a non-circular shape.
螢光体スクリーン面は、通常横長すなわち電子ビーム
配列方向（水平方向）の辺が長い矩形状であるので、水
平方向周辺部での歪が特に大きくなる。Since the phosphor screen surface is generally rectangular, which is long in the horizontal direction, that is, the side in the electron beam arrangement direction (horizontal direction), the distortion at the peripheral portion in the horizontal direction is particularly large.
第３図は４極レンズ磁界と電子ビームとの関係の説明
図であって、1,2,3は電子ビーム、４は水平偏向磁界で
ある。FIG. 3 is an explanatory view of the relationship between the quadrupole lens magnetic field and the electron beam, where 1, 2 and 3 are electron beams and 4 is a horizontal deflection magnetic field.
第４図はピンクッション磁界分布の水平偏向磁界と電
子ビームとの関係の説明図であって、６は２極磁界成
分、７は４極磁界成分、９は電子ビームである。FIG. 4 is an explanatory view of the relationship between the horizontal deflection magnetic field of the pincushion magnetic field distribution and the electron beam, where 6 is a dipole magnetic field component, 7 is a quadrupole magnetic field component, and 9 is an electron beam.
第５図はビームスポットの形状歪の説明図であって、
9Cは螢光体スクリーンの中央部におけるビームスポツ
ト、9Hは螢光体スクリーン周辺部における電子ビームの
高輝度部（コアー部）、9Lは同じく低輝度部（ヘイズ
部）である。FIG. 5 is an explanatory diagram of the shape distortion of the beam spot,
9C is a beam spot at the center of the phosphor screen, 9H is a high-brightness portion (core portion) of the electron beam at the periphery of the phosphor screen, and 9L is a low-brightness portion (haze portion).
第３図において、同図紙面の裏側から進行してきた３
本の電子ビーム1,2,3はピンクッション状分布の水平偏
向磁界４に入射することにより矢印５で示す方向への偏
向作用を受ける。すなわち、ピンクッション状分布の水
平偏向磁界４は、第４図の（ａ）に示すような２極磁界
成分６と、第４図の（ｂ）に示すような４極磁界成分７
とから成ると考えることができ、２極磁界成分６が電子
ビーム９に対し矢印８で示す方向への偏向作用を与え
る。In FIG. 3, 3 has progressed from the back side of the drawing.
The electron beams 1, 2, and 3 are deflected in a direction indicated by an arrow 5 by being incident on a horizontal deflection magnetic field 4 having a pincushion distribution. That is, the horizontal deflection magnetic field 4 having a pincushion-like distribution has a dipole magnetic field component 6 as shown in FIG. 4A and a quadrupole magnetic field component 7 as shown in FIG.
The dipole magnetic field component 6 gives the electron beam 9 a deflection action in the direction indicated by the arrow 8.
４極磁界成分７は３本の電子ビームにセルフコンバー
ゼンス作用を与えるものであるが、１本の電子ビーム９
についてみると、水平方向に発散作用を、垂直方向に集
束作用をそれぞれ与えるがために、横長偏平の断面形状
となる。The quadrupole magnetic field component 7 gives a self-convergence effect to three electron beams, but one electron beam 9
In order to give a diverging action in the horizontal direction and a focusing action in the vertical direction, the cross-sectional shape becomes horizontally flat.
ところで、前記発散作用は、電子ビーム偏向角度の増
大に伴い電子ビーム軌道が長大となることによる電子ビ
ームスポットのオーバフォーカスを打ち消す向きに作用
するので、インライン型カラー受像管では、電子ビーム
スポットの水平方向に関しては、偏向期間中、最適フォ
ーカス状態に保たれる。しかし、垂直方向に関しては、
前記集束作用が加わることによって著しくオーバフォー
カスの度合が増す。By the way, since the diverging action acts in a direction to cancel the overfocus of the electron beam spot due to the electron beam trajectory becoming longer as the electron beam deflection angle increases, in the in-line type color picture tube, the horizontal direction of the electron beam spot is reduced. Regarding the direction, the optimum focus state is maintained during the deflection period. But in the vertical direction,
The degree of overfocus is significantly increased by the addition of the focusing action.
その結果、螢光体スクリーン面の中央部に生成される
電子ビームスポットが第５図（ａ）の9Cに示すような円
形となるのに対し、水平方向周辺部に生成される電子ビ
ームスポットは、同図（ｂ）に示すように、高輝度のコ
アー部9Hと低輝度のヘイズ部9Lとから成る非円形に歪
み、特にヘイズ部9Lの垂直方向への大きな伸びがフォー
カス特性に悪影響を及ぼす。As a result, the electron beam spot generated at the center of the phosphor screen surface becomes circular as shown at 9C in FIG. 5 (a), whereas the electron beam spot generated at the peripheral portion in the horizontal direction is As shown in FIG. 2B, the non-circular distortion including the high-luminance core portion 9H and the low-luminance haze portion 9L, and particularly the large vertical extension of the haze portion 9L adversely affects the focus characteristics. .
そして、このような場合、従来のダイナミックフォー
カス方式を適用すると、この方式が主レンズのレンズ作
用を水平，垂直方向に関係なく均等に弱めるので、垂直
方向についてはヘイズ部9Lを除去しても、すでに最適フ
ォーカスとなっている水平方向はアンダーフォーカス状
態になり、水平方向の径が増大してしまう。In such a case, if the conventional dynamic focus method is applied, this method uniformly weakens the lens action of the main lens regardless of the horizontal and vertical directions, so even if the haze portion 9L is removed in the vertical direction, The horizontal direction in which the optimum focus has already been achieved becomes an underfocus state, and the diameter in the horizontal direction increases.
この結果、電子ビームスポットは著しく横長となり、
水平方向の解像度が低下する。As a result, the electron beam spot becomes remarkably oblong,
The horizontal resolution is reduced.
このような問題を解決し螢光体スクリーン面の全域に
おいて高い解像度を得ることができるようにした受像管
装置が特開昭63−32837号公報に開示されている。Japanese Patent Application Laid-Open No. 63-32837 discloses a picture tube device which solves such a problem and can obtain a high resolution over the entire phosphor screen surface.
第６図は上記公報に開示された受像管装置の電子銃の
説明図である。FIG. 6 is an explanatory view of the electron gun of the picture tube device disclosed in the above publication.
同図において、水平一直線上に配列された３個の陰極
10a,10b,10cは、制御電極110,加速電極120,第１集束電
極130,第２集束電極140および最終加速電極（陽極）150
と共にインライン形電子銃を構成している。In the figure, three cathodes arranged on a horizontal straight line
10a, 10b, 10c are a control electrode 110, an acceleration electrode 120, a first focusing electrode 130, a second focusing electrode 140, and a final accelerating electrode (anode) 150.
Together, they constitute an in-line type electron gun.
そして、第１集束電極130は第２集束電極140側の端面
に３個の円形の電子ビーム通過孔130a,130b,130cを有す
ると共に、これらの電子ビーム通過孔を挟むから領域か
ら突出した４個の互に平行な電界生成用垂直板部131,13
2,133,134を有している。また、第２集束電極140は第１
集束電極130側の端面に３個の円形の電子ビーム通過孔1
41,142,143を有すると共に、これら電子ビーム通過孔を
垂直方向から挟む領域より突出した２枚の互に平行な電
界生成用水平板部144,145を有し、陽極150側の端面には
３個の円形の電子ビーム通過孔146,147,148を有してい
る。そして、陽極150の第２集束電極140側の端面には、
３個の円形の電子ビーム通過孔151,152,153が形成され
ており、第２集束電極140と陽極150との間に３個の主レ
ンズが生成されるようになつている。The first focusing electrode 130 has three circular electron beam passage holes 130a, 130b, and 130c on the end face on the side of the second focusing electrode 140, and has four electron beam passage holes protruding from the region because these electron beam passage holes are interposed therebetween. Vertical plate sections 131 and 13 parallel to each other
It has 2,133,134. Also, the second focusing electrode 140 is
Three circular electron beam passage holes 1 in the end face on the side of the focusing electrode 130
41, 142, 143, and two parallel electric field generating horizontal plates 144, 145 protruding from a region sandwiching these electron beam passage holes from the vertical direction, and three circular electron beams are provided on the end face on the anode 150 side. It has passage holes 146, 147, 148. The end face of the anode 150 on the second focusing electrode 140 side has
Three circular electron beam passage holes 151, 152, and 153 are formed, and three main lenses are generated between the second focusing electrode 140 and the anode 150.
なお、制御電極110および加速電極120は、それぞれ３
個の電子ビーム通過孔111,112,113、121,122,123を有
し、第１集束電極130の加速電極120側の端面には、３個
の円形の電子ビーム通過孔131,132,133が形成されてい
る。Note that the control electrode 110 and the acceleration electrode 120 are each 3
There are three electron beam passage holes 111, 112, 113, 121, 122, 123, and three circular electron beam passage holes 131, 132, 133 are formed on the end face of the first focusing electrode 130 on the side of the acceleration electrode 120.
上記の構成において、第１集束電極130に一定の第１
フオーカス電圧（Vfc）を、陽極150に一定の高電圧
（Va）を、第２集束電極140には電子ビームの偏向角度
の増大に伴つて第１フオーカス電圧（Vfc）よりも高い
値に変化するダイナミツク電圧（Vd）を、それぞれ印加
する電圧印加手段を備えている。In the above configuration, the first focusing electrode 130 has a fixed first
The focus voltage (V fc ), the constant high voltage (V a ) to the anode 150, and the second focusing electrode 140 higher than the first focus voltage (V fc ) as the deflection angle of the electron beam increases. Voltage applying means for applying a dynamic voltage (V d ) that changes to
これにより、水平偏向が零になる時点，つまり第１集
束電極130と第２集束電極140が共に同一電位となる時点
では、両電極の電子ビーム通過孔が縦長または横長であ
つても、これらの形状が電子ビームに与える影響はほと
んどない。そして、第２集束電極140と陽極150との間に
電位差が生じて、ここに３個の主レンズが生成され、３
本の電子ビームが螢光体スクリーン面の中央部で最適フ
オーカスで集束する。水平偏向角度を増すと、第２集束
電極140の電位が第１集束電極130の電位よりも高くな
り、電極間には電界生成用垂直板部131,132,133,134お
よび電界生成用水平板部144,145による４極電界が生成
される。また、第２集束電極140と陽極150との間で電位
差が減少するので、主レンズのレンズ作用が弱くなる。Thus, when the horizontal deflection becomes zero, that is, when the first focusing electrode 130 and the second focusing electrode 140 both have the same potential, even if the electron beam passage holes of both electrodes are vertically long or horizontally long, these electrodes may be used. The shape has little effect on the electron beam. Then, a potential difference is generated between the second focusing electrode 140 and the anode 150, and three main lenses are generated therein, and 3
The electron beam of the book is focused at the optimum focus at the center of the phosphor screen. When the horizontal deflection angle is increased, the potential of the second focusing electrode 140 becomes higher than the potential of the first focusing electrode 130, and a four-pole electric field generated by the electric field generating vertical plates 131, 132, 133, 134 and the electric field generating horizontal plates 144, 145 is provided between the electrodes. Generated. Further, since the potential difference between the second focusing electrode 140 and the anode 150 decreases, the lens function of the main lens weakens.
第７図は、第６図における４極電界によるレンズ作用
の簡単な説明図であつて、第１集束電極130の垂直板部1
32,133にV1,第２集束電極140の水平板部144,145にV2の
電位を与え、V1＜V2の条件下で両電極間に生成される４
極レンズ電界は同図に示したようになる。FIG. 7 is a simple explanatory view of the lens action by the quadrupole electric field in FIG. 6, and shows the vertical plate portion 1 of the first focusing electrode 130.
32,133 to V 1, giving the potential of V 2 in the horizontal plate portion 144 and 145 of the second focusing electrode 140, 4 to be generated between the electrodes under the conditions of V 1 <V 2
The pole lens electric field is as shown in FIG.
上記４極レンズ電界を構成する等電位線は、矢印54に
示した電位ベクトルとなる。The equipotential lines forming the quadrupole lens electric field are the potential vectors indicated by arrows 54.
この４極レンズ電界により、電子ビーム55には、上下
方向に発散，左右方向に収束する力Fv,FHが作用し、縦
長の断面形状を持つものとなる。これは、偏向磁界を通
過する電子ビームが前記第４図の（ｂ）に示したような
４極成分により、横長の断面形状となるのと逆であり、
これら縦長と横長の相殺によつて電子ビームの横長偏平
化を防止することができる。This quadrupole lens electric field, the electron beam 55, diverging in the vertical direction, the force F v converging in the horizontal direction, F H acts, and those with a vertically elongated cross-sectional shape. This is opposite to the case where the electron beam passing through the deflection magnetic field has a horizontally long cross-sectional shape due to the quadrupole component as shown in FIG.
The cancellation of the vertical and horizontal lengths can prevent the electron beam from being flattened horizontally.
また、偏向角度の増大に伴つて、主レンズでの収束作
用が前述のように弱くなるので、ビームスポツトの偏向
によるオーバーフオーカス化も同時に防止できるもので
あり、螢光体スクリーン面の周辺部においても、径小か
つ真円に近いビームスポツトを生成せしめることができ
る。Further, as the deflection angle is increased, the convergence action of the main lens is weakened as described above, so that overfocus due to the deflection of the beam spot can be prevented at the same time. Also, a beam spot with a small diameter and a shape close to a perfect circle can be generated.
一般に、カラー受像管用電子銃では、３本の電子ビー
ムを螢光体スクリーン面上の画一点にコンバーゼンスさ
せる必要がある。Generally, in an electron gun for a color picture tube, it is necessary to converge three electron beams to one point on the phosphor screen.
このコンバーゼンスの方法としては様々な技法が提案
されているが、その１つは、最終主レンズを形成させる
集束電極と最終加速電極（陽極）のサイドビーム通過孔
の電子ビーム通過孔の電子ビーム軌道軸をずらす（オフ
セツトする）方式であり、また、その１つは、３個の陰
極から螢光体スクリーンまでを結ぶ線上に、各電極のサ
イド電子ビーム通過孔とセンター電子ビーム通過孔との
離軸距離を変える方式である。前者の方式は、３個の陰
極から収束電極までのサイド電子ビーム通過孔とセンタ
ー電子ビーム通過孔の離軸距離を同一軸上に配置し、最
終加速電極のサイド電子ビーム通過孔の中心を前段電極
より外側に離心させ、センター電子ビームとサイド電子
ビームを螢光面スクリーン上にコンバーゼンスさせてい
る。Various techniques have been proposed for this convergence method. One of them is an electron beam trajectory of an electron beam passage hole of a side beam passage hole of a focusing electrode and a final acceleration electrode (anode) for forming a final main lens. One method is to shift the axis (offset), and one of them is to separate the side electron beam passage hole and the center electron beam passage hole of each electrode from a line connecting the three cathodes to the phosphor screen. This method changes the axial distance. In the former method, the off-axis distance between the side electron beam passage hole from the three cathodes to the focusing electrode and the center electron beam passage hole is arranged on the same axis, and the center of the side electron beam passage hole of the final acceleration electrode is placed in the front stage. The center electron beam and the side electron beam are converged on the phosphor screen by being decentered outside the electrodes.
この方式では、電極の組立時に陰極から収束電極まで
の３電子銃が同一軸治具で組立ることが可能であるた
め、量産性の良い構造として多用されている。In this method, since the three electron guns from the cathode to the focusing electrode can be assembled with the same axis jig when assembling the electrodes, the structure is often used as a structure with good mass productivity.
しかし、この構造では、前記特開昭63−32837号公報
に記載の電子銃に適用しようとすると、第２集束電極へ
のダイナミック電圧の印加による最終加速電極とのレン
ズ倍率が変化に伴い、サイド電子ビームをコンバーゼン
スさせる力が変化し、コンバーゼンスのずれが生じると
いう欠点がある。However, in this structure, when applying to the electron gun described in JP-A-63-32837, the lens magnification with the final accelerating electrode due to the application of the dynamic voltage to the second focusing electrode changes, and the There is a drawback that the force for converging the electron beam changes, and the convergence shifts.
一方、前記後者の方式を上記特開昭63−32837号公報
に記載の電子銃に適用しようとすると、電子ビーム軌道
軸と各電極のレンズ中心とが同一軸上にあるため、第２
集束電極にダイナミツク電圧を印加してもコンバーゼン
スのずれは発生しないが、陰極から最終加速電極までの
各電極のサイド電子ビーム通過孔とセンター電子ビーム
通過孔の離軸距離が異なるため、特殊な電極組立治具を
使用しなければならず、組立作業が著しく困難で、量産
に適さないという欠点がある。On the other hand, when the latter method is applied to the electron gun described in JP-A-63-32837, since the electron beam orbit axis and the lens center of each electrode are on the same axis, the second method cannot be used.
Even if a dynamic voltage is applied to the focusing electrode, there is no convergence deviation.However, since the off-axis distance between the side electron beam passage hole and the center electron beam passage hole of each electrode from the cathode to the final acceleration electrode is different, special electrode There is a drawback that an assembling jig must be used, the assembling work is extremely difficult, and it is not suitable for mass production.
本発明の目的は、上記従来技術の欠点を解消し、新規
な電極構成の主レンズを採用することによつて、螢光体
スクリーンの全域に亘つて高い解像度で、かつ良好なコ
ンバーゼンス特性が得られると共に、電極組立が容易な
カラー受像管用電子銃を提供することにある。An object of the present invention is to solve the above-mentioned disadvantages of the prior art and to obtain a high resolution and good convergence characteristics over the entire area of the phosphor screen by employing a main lens having a novel electrode configuration. Another object of the present invention is to provide an electron gun for a color picture tube, which is easy to assemble with electrodes.
上記目的は、一方向（水平走査方向：以下、水平方向
と称する）に配列した３本の電子ビームを出射する陰極
と、この陰極に対して電子銃軸方向に、少なくとも、制
御電極，加速電極，集束電極，陽極とを順に配置した電
子銃において、集束電極を第１集束電極と第２集束電極
とで構成し、上記第１集束電極に、縦長のあるいは電子
ビームの個数に応じた３個の円形の電子ビーム通過孔を
有すると共に、この電子ビーム通過孔を電子ビーム配列
方向から挟むように第２集束電極方向に植立させた複数
の平行平板電極（垂直板）を有し、かつ、サイド電子ビ
ーム通過孔の外側の垂直板の高さがセンター電子ビーム
通過孔側の垂直板より高く設定した電極と、第２集束電
極に横長のあるいは電子ビームの個数に応じた３個の円
形の電子ビーム通過孔をその電子ビーム配列方向と直角
な方向（垂直方向）から挟むように第１集束電極方向に
植立させた一対、または三対の平行平板電極（水平板）
とを設けたことによって達成される。The object is to provide a cathode for emitting three electron beams arranged in one direction (horizontal scanning direction: hereinafter referred to as a horizontal direction), and at least a control electrode and an acceleration electrode with respect to the cathode in the electron gun axial direction. , A focusing electrode, and an anode, wherein the focusing electrode is composed of a first focusing electrode and a second focusing electrode, and the first focusing electrode has three vertically elongated or three-electron beams corresponding to the number of electron beams. And a plurality of parallel plate electrodes (vertical plates) which are set up in the direction of the second focusing electrode so as to sandwich the electron beam passage hole from the electron beam arrangement direction, and An electrode in which the height of the vertical plate outside the side electron beam passage hole is set higher than the height of the vertical plate on the side of the center electron beam passage hole, and three second circular focusing electrodes which are horizontally long or three circular according to the number of electron beams. Electron beam passage The electron beam array direction perpendicular to the direction the pair were planted in the first focusing electrode direction so as to sandwich the (vertical direction), or three pairs of parallel plate electrodes (horizontal plate)
This is achieved by providing
第１集束電極の電子ビーム通過孔を挟む平行平板電極
（垂直板）と第２集束電極の電子ビーム通過孔を挟む平
行平板電極（水平板）とによって４極レンズ電界が形成
される。A quadrupole lens electric field is formed by a parallel plate electrode (vertical plate) sandwiching the electron beam passage hole of the first focusing electrode and a parallel plate electrode (horizontal plate) sandwiching the electron beam passage hole of the second focusing electrode.
また、第１集束電極に設けた垂直板の高さを両サイド
電子ビーム通過孔の外側を内側に対して高くすることに
より、外側の垂直板から内側の垂直板との間にサイド電
子ビームのコンバーゼンスのずれを補正するための傾斜
電界が形成される。In addition, by increasing the height of the vertical plate provided on the first focusing electrode so that the outside of both side electron beam passage holes is higher than the inner side, the side electron beam is transferred between the outer vertical plate and the inner vertical plate. An inclined electric field for correcting the convergence deviation is formed.
このときのサイド電子ビーム通過孔の電子銃軸からの
距離は、制御電極，加速電極，第１集束電極，第２集電
極いずれも同じであり、陽極はサイド電子ビーム通過孔
の電子銃軸からの離軸距離を上記前段電極より大きくと
り、サイド電子ビームのコンバーゼンスを得ている。At this time, the distance of the side electron beam passage hole from the electron gun axis is the same for all of the control electrode, the acceleration electrode, the first focusing electrode, and the second collection electrode, and the anode is located at a distance from the electron gun axis of the side electron beam passage hole. The eccentric distance is made larger than that of the above-mentioned front-stage electrode to obtain convergence of the side electron beam.
以上のことから、各電極のサイド電子ビーム通過孔の
離軸距離を同じくすることができ、軸ずれのないインラ
イン型電子銃を容易に組立てることもできるとともに、
螢光体スクリーン面の全域にわたって高い解像度特性と
良好なコンバーゼンス特性を示すカラー受像管用電子銃
が得られる。From the above, the off-axis distance of the side electron beam passage hole of each electrode can be made the same, and an in-line type electron gun without axis deviation can be easily assembled,
An electron gun for a color picture tube which exhibits high resolution characteristics and good convergence characteristics over the entire area of the phosphor screen can be obtained.
以下、本発明の実施例を図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明によるカラー受像管用電子銃の一実施
例の説明図であって、同図（ａ）は電子銃の構造を示す
断面図、同図（ｂ）は第１集束電極を同図（ａ）の矢印
Ａ方向からみた正面図、同図（ｃ）は第２集束電極を同
図（ａ）の矢印Ｂ方向からみた正面図であって、K1,K2,
K3は熱陰極（以下、単に陰極と称する）、10は制御電
極、20は加速電極、30は第１集束電極、40は第２集束電
極、50は陽極（最終加速電極）、11,12,13、31a,32a,33
a、31b,32b,33b、41a,42a,43a、41b,42b,43b、51,52,53
は電子ビーム通過孔、Ｃは電子銃軸、CBはセンター電子
ビーム、SB1,SB2はサイド電子ビームである。FIG. 1 is an explanatory view of an embodiment of an electron gun for a color picture tube according to the present invention. FIG. 1 (a) is a sectional view showing the structure of the electron gun, and FIG. 1 (b) shows the first focusing electrode. (A) is a front view as seen from the direction of arrow A, and (c) is a front view of the second focusing electrode as seen from the direction of arrow B in (a), where K 1 , K 2 ,
K 3 is a hot cathode (hereinafter simply referred to as a cathode), 10 is a control electrode, 20 is an accelerating electrode, 30 is a first focusing electrode, 40 is a second focusing electrode, 50 is an anode (final accelerating electrode), 11, 12 , 13,31a, 32a, 33
a, 31b, 32b, 33b, 41a, 42a, 43a, 41b, 42b, 43b, 51, 52, 53
Is an electron beam passage hole, C is an electron gun axis, CB is a center electron beam, and SB 1 and SB 2 are side electron beams.
同図において、水平方向一直線上に配列された陰極
K1,K2,K3と、制御電極10、加速電極20と、第１集束電極
30と、第２集束電極40および最終加速電極である陽極50
とでインライン型カラー受像管用電子銃を構成してい
る。In the figure, the cathodes are arranged on a straight line in the horizontal direction.
K 1 , K 2 , K 3 , control electrode 10, acceleration electrode 20, first focusing electrode
30 and a second focusing electrode 40 and an anode 50 as a final accelerating electrode.
These constitute an electron gun for an in-line type color picture tube.
第１集束電極30は、第２集束電極40側の端面に３個の
円形の電子ビーム通過孔31a,32a,33aを有し、第２集束
電極40に対向してこの電子ビーム通過孔を形成する端面
から上記電子ビーム通過孔を水平方向から挟んで上記第
２集束電極40方向に垂直に植立した４個の平行平板34,3
5,36,37からなる第１の平板電極（垂直板）を有してい
る。そして、この平行平板の高さは、外側の平行平板3
4,37の高さをh1とし、内側の平行平板35,36の高さをh2
とすると、h1＞h2となつている。The first focusing electrode 30 has three circular electron beam passing holes 31 a , 32 a , and 33 a on an end face on the side of the second focusing electrode 40, and passes through the electron beam facing the second focusing electrode 40. Four parallel flat plates 34, 3 vertically set in the direction of the second focusing electrode 40 with the electron beam passing hole interposed therebetween in the horizontal direction from the end surface forming the hole.
It has a first plate electrode (vertical plate) composed of 5, 36, 37. The height of this parallel plate is
The height and h 1 of 4 and 37, the height of the inner of the parallel plate 35, 36 h 2
Then, h 1 > h 2 .
また、第２集束電極40は、第１集束電極30側の端面に
３個の円形の電子ビーム通過孔41a,42a,43aを有し、こ
の電子ビーム通過孔を垂直方向から挟んで上記第１集束
電極30方向に水平に植立した一対の平行平板44,45から
成る第２の平板電極（水平板）を有している。この水平
板の対は、各電子ビームに対して各別に（すなわち、３
対）設けてもよいものである。Further, the second focusing electrode 40 has three circular electron beam passing holes 41a, 42a, 43a on the end face on the first focusing electrode 30 side, and the first focusing electrode 30 sandwiches the electron beam passing holes from the vertical direction. It has a second flat plate electrode (horizontal plate) composed of a pair of parallel flat plates 44 and 45 stood horizontally in the direction of the focusing electrode 30. This pair of horizontal plates is separately for each electron beam (ie, 3
Pair) may be provided.
そして、上記第２の平板電極を構成する平行平板44,4
5の先端部44a,45aは、第１集束電極30方向に延長されて
おり、第１集束電極30の平行平板34,35,36,37に対して
上下方向から一定の間隔をおいて挟むように設定されて
る。また、第２集束電極40側の第１の平板電極44、45の
先端部44a、45と、第１集束電極30側のサイド電子ビー
ム通過孔の外側に配置した第２の平板電極34、37の先端
部34a、37aとの間を管軸方向に一定間隔を隔てて対向す
るように設定してもよい。Then, the parallel plates 44, 4 constituting the second plate electrode
The tip portions 44a, 45a of 5 extend in the direction of the first focusing electrode 30 so as to sandwich the parallel plates 34, 35, 36, 37 of the first focusing electrode 30 at regular intervals from the top and bottom. Is set to Further, the tip portions 44a, 45 of the first plate electrodes 44, 45 on the second focusing electrode 40 side and the second plate electrodes 34, 37 disposed outside the side electron beam passage holes on the first focusing electrode 30 side. May be set so as to be opposed to the tip portions 34a and 37a at a constant interval in the tube axis direction.
陽極50側の端面には、３個の円形の電子ビーム通過孔
41b,42b,43bを有している。そして、この陽極50の第２
集束電極40側の端面には３個の円形の電子ビーム通過孔
51,52,53が設けられており、サイズ電子ビーム通過孔5
1,53の電子銃軸Ｃ（センター電子ビームCBの軸と一致）
からの離軸距離S2は、前段電極である陰極1,K2,K3、制
御電極10、加速電極20、第１集束電極30、第２集束電極
40のサイド電子ビーム通過孔の離軸距離S1に対して、S2
＞S1の関係となっており、第２集束電極40と陽極50との
間で主レンズが形成され、サイド電子ビームSB1,SB2を
螢光体スクリーン面上に集中させるようになっている。At the end face on the anode 50 side, three circular electron beam passage holes
41b, 42b and 43b. And the second of this anode 50
Three circular electron beam passage holes are provided on the end face on the focusing electrode 40 side.
51, 52, 53 are provided, and the size electron beam passage hole 5
1,53 electron gun axes C (coincides with the center electron beam CB axis)
The off-axis distance S 2 from the cathode is the cathode 1 , K 2 , K 3 , the control electrode 10, the acceleration electrode 20, the first focusing electrode 30, the second focusing electrode
Against off-axis distance S 1 of 40 of the side electron beam passage apertures, S 2
> Has a relationship of S 1, is the main lens is formed between the second focusing electrode 40 and the anode 50, is the side electron beams SB 1, SB 2 so as to focus on fluorescers screen plane I have.
なお、制御電極10および加速電極20は、それぞれ３個
の円形電子ビーム通過孔11,12,13、21,22,23を有し、第
１集束電極30の加速電極20側の端面には３個の円形の電
子ビーム通過孔31b,32b,33bが形成されている。The control electrode 10 and the acceleration electrode 20 have three circular electron beam passage holes 11, 12, 13, 21, 22, and 23, respectively, and the end face of the first focusing electrode 30 on the side of the acceleration electrode 20 has three holes. The plurality of circular electron beam passage holes 31b, 32b, 33b are formed.
動作時に各電極に与えられる印加電圧は、陰極に50〜
170V、制御電極に0V、加速電極に400〜800Vを、第１集
束電極の電圧（Vf）として５〜8kV、陽極電圧（Eb）と
して25kVであり、第２集束電極には電子ビームの垂直，
水平偏向に同期して変化するダイナミック電圧（DVf）
が印加される。このダイナミック電圧（DVf）は、電子
ビームの偏向量が０の時第１集束電極の電位Vfと同等の
５〜8kVの電位が与えられ、電子ビーム偏向量が増すに
従って漸次上昇し、電子ビーム偏向量が最大の時第１集
束電極電圧Vfよりも0.4〜1kVだけ高い電位となる。The applied voltage applied to each electrode during operation is 50-
170 V, 0 V for the control electrode, 400 to 800 V for the acceleration electrode, 5 to 8 kV as the voltage (Vf) of the first focusing electrode and 25 kV as the anode voltage (Eb).
Dynamic voltage (DVf) that changes in synchronization with horizontal deflection
Is applied. When the deflection amount of the electron beam is 0, a potential of 5 to 8 kV equivalent to the potential Vf of the first focusing electrode is applied to the dynamic voltage (DVf), and the dynamic voltage (DVf) gradually increases as the deflection amount of the electron beam increases. When the amount is maximum, the potential becomes 0.4 to 1 kV higher than the first focusing electrode voltage Vf.
電子ビームの偏向量が０の時は、上記のように、第１
集束電極30,第２集束電極40との間に電位差がないため
第１集束電極内部の平行平板（第１の平板電極：垂直
板）34,35,36,37と第２集束電極40に取り付けられてい
る平行平板（第２の平板電極：水平板）44,45による電
子ビームへの影響はなく、電子ビームは第２集収束電極
40と陽極50との間の主レンズにより、螢光体スクリーン
面の中央部で最適フォーカスで集中する。When the deflection amount of the electron beam is 0, the first
Since there is no potential difference between the focusing electrode 30 and the second focusing electrode 40, the first focusing electrode is attached to the parallel flat plates (first plate electrode: vertical plate) 34, 35, 36, 37 and the second focusing electrode 40. The parallel plate (second plate electrode: horizontal plate) 44, 45 does not affect the electron beam, and the electron beam is focused on the second focusing electrode.
The main lens between 40 and anode 50 concentrates at the optimum focus at the center of the phosphor screen surface.
電子ビームの偏向量が増すと、第２集束電極40の電位
が第１集束電極30の電位より高くなることから、第１集
束電極30内部の平行平板（垂直板）34,35,36,37と第２
集束電極40に取り付けられた平行平板（水平板）44,45
とによって４極レンズ電界が形成されると共に、第２集
束電極40と陽極50との電位差が減少した主レンズによる
集束作用が弱くなる。When the deflection amount of the electron beam increases, the potential of the second focusing electrode 40 becomes higher than the potential of the first focusing electrode 30, so that the parallel flat plates (vertical plates) 34, 35, 36, 37 inside the first focusing electrode 30 are provided. And the second
Parallel plates (horizontal plates) 44, 45 attached to the focusing electrode 40
As a result, a quadrupole lens electric field is formed, and the focusing action by the main lens having a reduced potential difference between the second focusing electrode 40 and the anode 50 is weakened.
４極レンズ電界の作用は、前記従来技術の項での説明
と同様である。The operation of the quadrupole lens electric field is the same as that described in the section of the related art.
第２図は第１図に示した本発明による電子銃のコンバ
ーゼンスシステムの説明図であって、Fa,Fa′,Fbは電界
により電子ビームに与えられる力、第１図と同一部分に
は同一符号を付してあり、（ａ）は蛍光体スクリーン面
中央部での偏向時、（ｂ）は螢光体スクリーン面コーナ
部での偏向時を示す。FIG. 2 is an explanatory view of the convergence system of the electron gun according to the present invention shown in FIG. 1, wherein Fa, Fa ', and Fb are forces applied to the electron beam by an electric field, and the same parts as those in FIG. Reference numerals are used, where (a) shows the time of deflection at the center of the phosphor screen surface, and (b) shows the time of deflection at the corner of the phosphor screen surface.
同図（ａ）において、蛍光体スクリーン面中央部では
第１集束電極30の電位Vfが第２集束電極40の電位DVfと
同じなので（Vf＝DVf＜＜＜Eb）、電子ビームの偏向量
が０の時の陽極50でのサイド電子ビーム透過孔51の電子
銃軸からの距離S2が第２集束電極40のサイド電子ビーム
透過孔41bの電子銃軸からの距離S1よりも大きく、サイ
ド電子ビーム透過孔の方が外側に離心しているため、サ
イド電子ビームSB1は陽極50のサイド電子ビーム通過孔5
1,53（53は図示せず）に形成される発散レンズの内側
（センター電子ビームCB側）に通過するため、センター
電子ビームCB側にFaの力で曲げられ、螢光体スクリーン
面上でセンター電子ビームCBとコンバーゼンスする。In FIG. 9A, since the potential Vf of the first focusing electrode 30 is the same as the potential DVf of the second focusing electrode 40 at the center of the phosphor screen surface (Vf = DVf << Eb), the deflection amount of the electron beam is reduced. greater than the distance S 1 from the side electron beams distance S 2 from the electron gun axis of the transmission hole 51 is an electron gun axis of the side electron beam passage apertures 41b of the second focus electrode 40 at the anode 50 at the time of 0, the side Since the electron beam transmission hole is more eccentric to the outside, the side electron beam SB 1 passes through the side electron beam passage hole 5 of the anode 50.
Since the light passes through the inside of the divergent lens (center electron beam CB side) formed at 1,53 (53 is not shown), it is bent toward the center electron beam CB by Fa force, and Convergence with center electron beam CB.
また、同図（ｂ）において、電子ビームの偏向量増大
に伴い、第２集束電極40の電位DVfが第１集束電極30の
電位Vfより高くなると（Vf＜DVf＜＜Eb）、第２集束電
極40と陽極50との電位差が少なくなり、陽極50のサイド
電子ビーム通過孔51,53（53は図示せず）でのサイド電
子ビームに与えられる力Fa′は上記第３図（ａ）におけ
るFaより弱くなり（Fa＞Fa′）、このFa′の力でセンタ
ー電子ビームCB方向に曲げられるので、サイド電子ビー
ムSB1はセンター電子ビームCBに対して螢光体スクリー
ン面上でコンバーゼンスしなくなる。このとき、第１集
束電極30の外側の垂直板34,37（37は図示せず）の先端
部34a37a（37aは図示せず）から内側の垂直板35,36の先
端部35a,36bにかけて、図示したような第２集束電極40
方向に内側が向いた傾斜電界が形成される。In FIG. 6B, when the potential DVf of the second focusing electrode 40 becomes higher than the potential Vf of the first focusing electrode 30 (Vf <DVf << Eb) as the deflection amount of the electron beam increases, the second focusing is performed. The potential difference between the electrode 40 and the anode 50 is reduced, and the force Fa ′ applied to the side electron beam in the side electron beam passage holes 51 and 53 (53 is not shown) of the anode 50 is the same as that shown in FIG. weaker than Fa (Fa> Fa '), the fa' so bent by the force of the center electron beam CB direction, side electron beams SB 1 ceases to convergence with phosphor screen surface on to the center electron beam CB . At this time, from the tip 34a37a (37a not shown) of the outer vertical plates 34, 37 (37 not shown) of the first focusing electrode 30 to the tips 35a, 36b of the inner vertical plates 35, 36, Second focusing electrode 40 as shown
A tilted electric field is formed which faces inward in the direction.
この傾斜電界は、電子ビームに集束作用を与え、サイ
ド電子ビームSB1をFbの力でセンター電子ビームCB方向
に曲げるように作用する。The inclined electric field gives a focusing effect on the electron beams, act to bend the side electron beams SB 1 to the center electron beam CB direction with a force of Fb.
第１集束電極30の垂直板34,37の先端部34a,37aから垂
直板35,36の先端部35a,36aまでの距離Ｌを変えることに
より、上記傾斜電界の大きさをコントロールすることが
でき、第２集束電極40の電位DVfの変化に対し、陽極電
極50のサイド電子ビーム通過孔51,53（53は図示せず）
によりこの電子ビーム通過孔を通過するサイド電子ビー
ムSB1に与えられるセンター電子ビームCB方向への力F
a′と上記垂直板34,37と垂直板35,36とによる力Fbとに
より上記第３図（ａ）における力Faの作用と同様の効果
が生じ、サイド電子ビームSB1は螢光体スクリーン面の
コーナ部においてもセンター電子ビームCBとコンバーゼ
ンスすることになる。By changing the distance L from the tips 34a, 37a of the vertical plates 34, 37 of the first focusing electrode 30 to the tips 35a, 36a of the vertical plates 35, 36, the magnitude of the gradient electric field can be controlled. In response to a change in the potential DVf of the second focusing electrode 40, the side electron beam passage holes 51 and 53 of the anode electrode 50 (53 is not shown).
Is applied to the side electron beam SB 1 passing through the electron beam passage hole by the force F in the direction of the center electron beam CB.
a 'and the same effect as the action of the force Fa in the FIG. 3 (a) is caused by the force Fb by the above vertical plate 34, 37 and the vertical plates 35 and 36, the side electron beams SB 1 is fluorescers screen Convergence with the center electron beam CB also occurs at the corners of the surface.
このように、上記実施例によれば、電子ビームスポッ
ト径を径小かつほぼ真円のままで、すなわち解像度を低
下させることなく、螢光体スクリーン面の全面にわたっ
てセンター電子ビームとサイド電子ビームのコンバーゼ
ンスを取ることができる。As described above, according to the above-described embodiment, the center electron beam and the side electron beam are spread over the entire surface of the phosphor screen with the electron beam spot diameter kept small and almost a perfect circle, that is, without reducing the resolution. Can take convergence.
また、本発明は、上記説明のように、集束電極を１段
とした電子銃に限らず、多段の収束電極を持つ形式の電
子銃にも適用できるものである。Further, as described above, the present invention can be applied not only to an electron gun having a single-stage focusing electrode but also to an electron gun having a multi-stage focusing electrode.
なお、上記の実施例では３個の陰極を備えたインライ
ン３電子ビーム型電子銃について説明したが、本発明は
これに限らず、３本の電子ビームに共通の単一陰極を持
つ電子銃、あるいは３本の電子ビーム以外の複数の電子
ビームを持つ各種電子銃にも適用できることはいうまで
もない。In the above embodiment, an in-line three electron beam type electron gun having three cathodes has been described. However, the present invention is not limited to this, and an electron gun having a single cathode common to three electron beams, Alternatively, it goes without saying that the present invention can be applied to various electron guns having a plurality of electron beams other than the three electron beams.
以上説明したように、本発明によれば、螢光体スクリ
ーン面の全域において高い解像度特性と良好なコンバー
ゼンス特性をもつカラー受像管用電子銃を得ることがで
きるのみならず、電子銃を構成する各電極間のサイド電
子ビーム通過孔を同一軸上に配列することも可能とな
り、正確な軸合わせが容易であるため、組立の簡易化に
より製造歩留りおよび品質改善に大きく寄与する優れた
機能のカラー受像管用電子銃を提供できる。As described above, according to the present invention, not only an electron gun for a color picture tube having high resolution characteristics and good convergence characteristics over the entire phosphor screen surface can be obtained, but also various components constituting the electron gun can be obtained. It is also possible to arrange the side electron beam passage holes between the electrodes on the same axis, and it is easy to perform accurate axis alignment. Therefore, color imaging with excellent functions that greatly contributes to manufacturing yield and quality improvement by simplifying assembly An electron gun for a tube can be provided.
特に、請求項１に記載の発明によれば、第１集束電極
側のサイド電子ビーム通過孔の外側に配置した第１の平
板電極の先端部と、第２集束電極側の第２の平板電極の
先端部とを管軸方向に一定間隔を隔てて対向配置するよ
うに設定しているので、これらの平板電極によって４極
レンズ電界が形成され、電子ビームに対して上下（垂
直）方向に発散作用が働き、左右（水平）方向に集束作
用が働く。In particular, according to the first aspect of the present invention, the tip of the first plate electrode disposed outside the side electron beam passage hole on the first focusing electrode side and the second plate electrode on the second focusing electrode side. Are arranged so as to be opposed to each other at a constant interval in the tube axis direction, so that a quadrupole lens electric field is formed by these flat electrodes, and diverges in the vertical (vertical) direction with respect to the electron beam. The action works, and the focusing action works in the left-right (horizontal) direction.
また、請求項２に記載の発明によれば、第１集束電極
側の第１の平板電極を垂直方向から挟み込んで重なり合
うように第２集束電極側の第２の平板電極を配置するよ
うに設定しているので、これらの平板電極によって４極
レンズ電界の強度が増し、電子ビームに対して上下（垂
直）方向に発散作用が強く働き、左右（水平）方向に集
束作用が強く働く。そして、第１の平板電極と第２の平
板電極とを重なり合わせることにより、第１の平板電極
と第２の平板電極の管軸方向の長さを短くすることがで
き、その分電子銃の全長が短くなり、奥行きの短いカラ
ー受像管を得ることができる。According to the second aspect of the present invention, the first plate electrode on the first focusing electrode side is sandwiched from the vertical direction and the second plate electrode on the second focusing electrode side is arranged so as to overlap. Therefore, the intensity of the electric field of the quadrupole lens is increased by these flat electrodes, and the electron beam has a strong diverging effect in the vertical (vertical) direction and a strong focusing effect in the left and right (horizontal) direction. By overlapping the first plate electrode and the second plate electrode, the length of the first plate electrode and the second plate electrode in the tube axis direction can be shortened. It is possible to obtain a color picture tube having a short overall length and a short depth.
第１図は本発明によるカラー受像管用電子銃の一実施例
の説明図、第２図は第１図に示した本発明による電子銃
のコンバーゼンスシステムの説明図、第３図は４極レン
ズ磁界と電子ビームとの関係の説明図、第４図はピンク
ッション磁界分布の水平偏向磁界と電子ビームとの関係
の説明図、第５図はビームスポットの形状歪の説明図、
第６図は従来の受像管装置の電子銃の説明図、第７図は
第６図における４極電界によるレンズ作用の簡単な説明
図である。 10……制御電極、20……加速電極、30……第１集束電
極、34,35,36,37……第１の平板電極（垂直板）、40…
…第２集束電極、44,45……第２の平板電極（水平
板）、50……陽極。1 is an explanatory view of an embodiment of an electron gun for a color picture tube according to the present invention, FIG. 2 is an explanatory view of a convergence system of the electron gun according to the present invention shown in FIG. 1, and FIG. 3 is a quadrupole lens magnetic field. FIG. 4 is an explanatory view of a relationship between a horizontal deflection magnetic field of a pincushion magnetic field distribution and an electron beam, FIG. 5 is an explanatory view of a shape distortion of a beam spot,
FIG. 6 is an explanatory view of an electron gun of a conventional picture tube device, and FIG. 7 is a simple explanatory view of a lens action by a quadrupole electric field in FIG. 10 control electrode, 20 acceleration electrode, 30 first focusing electrode, 34, 35, 36, 37 first flat plate electrode (vertical plate), 40
... Second focusing electrode, 44, 45... Second flat plate electrode (horizontal plate), 50.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H01J 29/48 - 29/51──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) H01J 29/48-29/51
Claims (4)
射する３個の陰極と、これらの陰極に対向して、少くと
も、制御電極、加速電極、集束電極、陽極とをこの順で
管軸方向に配置して成るカラー受像管用電子銃におい
て、前記集束電極は前記３個の陰極から出射される３本
の電子ビームを各別に通過させるビーム通過孔を有する
前記加速電極側に配置した第１集束電極と前記陽極側に
配置した第２集束電極とから成り、前記第１集束電極は
その第２集束電極に対向する端面に形成した電子ビーム
通過孔を通過する電子ビームの各々を前記電子ビーム配
列方向から挾んで前記第２集束電極方向に植立させた複
数の第１の平板状電極を備え、前記電子ビームのサイド
電子ビーム通過孔の外側に配置した前記第１の平板状電
極の管軸方向高さが前記電子ビームのセンター電子ビー
ム通過孔を挾んで植立した前記第１の平板状電極の管軸
方向高さより高く設定されており、前記第２集束電極は
前記第１集束電極に対向する端面に形成した電子ビーム
通過孔を通過する電子ビームを前記電子ビームの配列方
向応に対して垂直方向から挾んで前記第１集束電極方向
に植立させかつ前記サイド前記ビーム通過孔の外側に配
置した前記第１の平板状電極と管軸方向に一定距離を隔
てて対向するように延長させた第２の平板状電極を備
え、前記第２集束電極に電子ビームの偏向角度の増大に
伴って変化する電圧を印加する構成としたことを特徴と
するカラー受像管用電子銃。1. Three cathodes for emitting three electron beams arranged in one direction, and at least a control electrode, an accelerating electrode, a focusing electrode, and an anode opposed to these cathodes in this order. In the electron gun for a color picture tube, which is arranged in the tube axis direction, the focusing electrode is arranged on the side of the acceleration electrode having a beam passage hole through which three electron beams emitted from the three cathodes respectively pass. A first focusing electrode and a second focusing electrode disposed on the anode side. The first focusing electrode transmits each electron beam passing through an electron beam passage hole formed on an end surface facing the second focusing electrode. A plurality of first plate-like electrodes which are erected in the direction of the second focusing electrode so as to sandwich the electron beam arrangement direction, and wherein the first plate-like electrode is arranged outside a side electron beam passage hole of the electron beam; The height of the electrode in the tube axis direction The height of the first plate-like electrode is set higher than the height in the tube axis direction with the center electron beam passage hole of the electron beam interposed therebetween, and the second focusing electrode is provided on an end face facing the first focusing electrode. The electron beam passing through the formed electron beam passage hole is implanted in the direction of the first focusing electrode sandwiching the electron beam in a direction perpendicular to the arrangement direction of the electron beams, and the side is disposed outside the beam passage hole. A second plate-like electrode extending so as to face the first plate-like electrode at a predetermined distance in the tube axis direction, wherein the second focusing electrode changes with an increase in the deflection angle of the electron beam; An electron gun for a color picture tube, characterized in that a voltage is applied.
射する３個の陰極と、これらの陰極に対向して、少くと
も、制御電極、加速電極、集束電極、陽極とをこの順で
管軸方向に配置して成るカラー受像管用電子銃におい
て、前記集束電極は前記３個の陰極から出射される３本
の電子ビームを各別に通過させるビーム通過孔を有する
前記加速電極側に配置した第１集束電極と前記陽極側に
配置した第２集束電極とから成り、前記第１集束電極は
その第２集束電極に対向する端面に形成した電子ビーム
通過孔を通過する電子ビームの各々を前記電子ビーム配
列方向から挾んで前記第２集束電極方向に植立させた複
数の第１の平板状電極を備え、前記電子ビームのサイド
電子ビーム通過孔の外側に配置した前記第１の平板状電
極の管軸方向高さが前記電子ビームのセンター電子ビー
ム通過孔を挾んで植立した前記第１の平板状電極の管軸
方向高さより高く設定されており、前記第２集束電極は
前記第１集束電極に対向する端面に形成した電子ビーム
通過孔を通過する電子ビームを前記電子ビームの配列方
向に対して垂直方向から挾んで前記第１集束電極方向に
植立させかつ前記第１の平板状電極を前記垂直方向から
挾み込むように重なり合うように延長させた第２の平板
状電極を備え、前記第２集束電極に電子ビームの偏向角
度の増大に伴って変化する電圧を印加する構成としたこ
とを特徴とするカラー受像管用電子銃。2. A cathode, which emits three electron beams arranged in one direction, and at least a control electrode, an accelerating electrode, a focusing electrode, and an anode which are opposed to these cathodes in this order. In the electron gun for a color picture tube, which is arranged in the tube axis direction, the focusing electrode is arranged on the side of the acceleration electrode having a beam passage hole through which three electron beams emitted from the three cathodes respectively pass. A first focusing electrode and a second focusing electrode disposed on the anode side. The first focusing electrode transmits each electron beam passing through an electron beam passage hole formed on an end surface facing the second focusing electrode. A plurality of first plate-like electrodes which are erected in the direction of the second focusing electrode so as to sandwich the electron beam arrangement direction, and wherein the first plate-like electrode is arranged outside a side electron beam passage hole of the electron beam; The height of the electrode in the tube axis direction The height of the first plate-like electrode is set higher than the height in the tube axis direction with the center electron beam passage hole of the electron beam interposed therebetween, and the second focusing electrode is provided on an end face facing the first focusing electrode. An electron beam passing through the formed electron beam passage hole is implanted in the direction of the first focusing electrode by sandwiching the electron beam from the direction perpendicular to the arrangement direction of the electron beams, and the first plate-like electrode is sandwiched from the perpendicular direction by the electron beam. A second plate-like electrode extended so as to overlap so as to overlap, and configured to apply a voltage that changes with an increase in the deflection angle of the electron beam to the second focusing electrode. Electron gun for picture tubes.
射する３個の陰極と、これらの陰極に対向して、少くと
も、制御電極、加速電極、集束電極、陽極とをこの順で
管軸方向に配置して成るカラー受像管用電子銃におい
て、前記集束電極は前記３個の陰極から出射される３本
の電子ビームを各別に通過させるビーム通過孔を有する
前記加速電極側に配置した第１集束電極と前記陽極側に
配置した第２集束電極とから成り、前記第１集束電極は
その第２集束電極に対向する端面に形成した電子ビーム
通過孔を通過する電子ビームの各々を前記電子ビーム配
列方向から挾んで前記第２集束電極方向に植立させた複
数の第１の平板状電極を備え、前記電子ビームのサイド
電子ビーム通過孔の外側に配置した前記第１の平板状電
極の管軸方向高さが前記電子ビームのセンター電子ビー
ム通過孔を挾んで植立した前記第１の平板状電極の管軸
方向高さより高く設定されており、前記第２集束電極は
前記第１集束電極に対向する端面に形成した電子ビーム
通過孔を通過する電子ビームを前記電子ビームの配列方
向応に対して垂直方向から挾んで前記第１集束電極方向
に植立させた第２の平板状電極を備え、前記第２集束電
極に電子ビームの偏向角度の増大に伴って変化する電圧
を印加する構成としたことを特徴とするカラー受像管用
電子銃。3. A cathode, which emits three electron beams arranged in one direction, and at least a control electrode, an accelerating electrode, a focusing electrode, and an anode which are opposed to these cathodes in this order. In the electron gun for a color picture tube, which is arranged in the tube axis direction, the focusing electrode is arranged on the side of the acceleration electrode having a beam passage hole through which three electron beams emitted from the three cathodes respectively pass. A first focusing electrode and a second focusing electrode disposed on the anode side. The first focusing electrode transmits each electron beam passing through an electron beam passage hole formed on an end surface facing the second focusing electrode. A plurality of first plate-like electrodes which are erected in the direction of the second focusing electrode so as to sandwich the electron beam arrangement direction, and wherein the first plate-like electrode is arranged outside a side electron beam passage hole of the electron beam; The height of the electrode in the tube axis direction The height of the first plate-like electrode is set higher than the height in the tube axis direction with the center electron beam passage hole of the electron beam interposed therebetween, and the second focusing electrode is provided on an end face facing the first focusing electrode. A second plate-like electrode having an electron beam passing through the formed electron beam passage hole and perpendicular to the direction in which the electron beams are arranged, and standing in the direction of the first focusing electrode; An electron gun for a color picture tube, characterized in that a voltage that changes with an increase in the deflection angle of an electron beam is applied to a focusing electrode.
銃軸からの離軸距離が前記第２集束電極のサイド電子ビ
ーム通過孔の電子銃軸からの離軸距離より大きく設定さ
れていることを特徴とする請求項１、２または３記載の
カラー受像管用電子銃。4. The off-axis distance of the side electron beam passage hole of the anode from the electron gun axis is set larger than the off-axis distance of the side electron beam passage hole of the second focusing electrode from the electron gun axis. 4. The electron gun for a color picture tube according to claim 1, 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP767489A JP2796104B2 (en) | 1989-01-18 | 1989-01-18 | Electron gun for color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP767489A JP2796104B2 (en) | 1989-01-18 | 1989-01-18 | Electron gun for color picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02189842A JPH02189842A (en) | 1990-07-25 |
| JP2796104B2 true JP2796104B2 (en) | 1998-09-10 |
Family
ID=11672343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP767489A Expired - Fee Related JP2796104B2 (en) | 1989-01-18 | 1989-01-18 | Electron gun for color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2796104B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11219667A (en) * | 1998-01-30 | 1999-08-10 | Hitachi Ltd | Color cathode-ray tube |
-
1989
- 1989-01-18 JP JP767489A patent/JP2796104B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02189842A (en) | 1990-07-25 |
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