【発明の詳細な説明】 この発明は、偏向収差を補正する四極レンズを形成する
電極を備えた電子銃に関するものである。The present invention relates to an electron gun including an electrode forming a quadrupole lens for correcting deflection aberration.
セルフコンバーゼンス形の偏向ヨークを有するカラー陰
極線管では、偏向磁界によつて電子ビームが変形を受
け、螢光面の周縁部分のスポツト像が、長だ円形になる
偏向収差はよく知られている。In a color cathode ray tube having a self-convergence type deflection yoke, it is well known that the electron beam is deformed by the deflection magnetic field and the spot image at the peripheral portion of the fluorescent surface becomes elliptic.
この解消手段としては、電子銃内に四極レンズを形成す
る電極を配置し、静電的に電子ビームの変形を補正する
ようにした電子銃が提案されている。As a means for eliminating this, there has been proposed an electron gun in which an electrode forming a quadrupole lens is arranged in the electron gun to electrostatically correct the deformation of the electron beam.
第６図は、従来の四極レンズを形成する電極を示す一部
破断拡大斜視図である。図において、一線に並べられた
３つの円筒電極(11)，(12)，(13)の上下の面に対向する
透孔(11a),(11b),(12a),(12b),(13a),(13b)を設け、こ
れらの透孔(11a)〜(13b)の外側に対向して設けられた２
枚の平行板電極(14)，(15)と、３つの円筒電極(11)〜(1
3)の間に形成される電界が６つの透孔(11a)〜(13b)をと
おつて四極レンズを形成するように構成している。FIG. 6 is a partially cutaway enlarged perspective view showing electrodes forming a conventional quadrupole lens. In the figure, the through holes (11a), (11b), (12a), (12b), (13a) facing the upper and lower surfaces of three cylindrical electrodes (11), (12), (13) arranged in a line ), (13b) are provided, and 2 are provided so as to face the outer sides of these through holes (11a) to (13b).
Parallel plate electrodes (14) and (15) and three cylindrical electrodes (11) to (1
The electric field formed during 3) is configured so as to form a quadrupole lens through the six through holes (11a) to (13b).
しかし、これらの電極構造は一体化するのがむづかし
く、また構造上、組立て作業が複雑になるという問題点
があつた。However, it is difficult to integrate these electrode structures, and the assembly work is complicated due to the structure.
このような問題点を解消する構成として、第４図および
第５図に示したような電極構成が考えられる。第４図は
インライン形電子銃の縦断面図、第５図は第４図Ｖ−Ｖ
線矢視断面図である。図において、(4)は一線上に配列
された３個の陰極、(5)は制御電極、(6)は加速電極で、
(4)，(5)，(6)で３極部を構成する。(7)は前後２つに分
れている集束電極、(20)は３つの四極電極(1)，(2)，
(3)を構成する電極、(8)は陽極で、(4)〜(8)でインライ
ン形電子銃(9)を形成している。As a structure for solving such a problem, an electrode structure as shown in FIGS. 4 and 5 can be considered. FIG. 4 is a longitudinal sectional view of the in-line type electron gun, and FIG. 5 is FIG.
FIG. In the figure, (4) is three cathodes arranged in a line, (5) is a control electrode, (6) is an accelerating electrode,
(4), (5), and (6) form a three-pole part. (7) is a focusing electrode which is divided into two in the front and back, (20) is three quadrupole electrodes (1), (2),
The electrodes constituting (3), (8) are anodes, and (4) to (8) form an in-line type electron gun (9).
電極(20)は、第５図に示すように、それぞれ一対の垂直
電極片(1a)と(1c)，(2a)と(2c)，(3a)と(3c)、および、
それぞれ一対の水平電極片(1b)と(1d)，(2b)と(2d)，(3
b)と(3d)で、３本の電子ビーム(10B),(10G),(10R)を、
両側および上下から各別に挾む四極電極(1)，(2)，(3)
を構成しており、４枚の電極片の各組は、電子ビーム(1
0B),(10G),(10R)が通る中心線に対してそれぞれ軸対称
形に形成されている。The electrodes (20) are, as shown in FIG. 5, a pair of vertical electrode pieces (1a) and (1c), (2a) and (2c), (3a) and (3c), and
A pair of horizontal electrode pieces (1b) and (1d), (2b) and (2d), (3
b) and (3d), three electron beams (10B), (10G), (10R),
Quadrupole electrodes (1), (2), (3) that are individually sandwiched from both sides and from above and below
And each set of four electrode pieces is
They are formed in axial symmetry with respect to the center line through which 0B), (10G), and (10R) pass.
このように構成されている四極電極(20)の各垂直電極片
(1a),(1c),(2a),(2c),(3a),(3c)（以下、(1a)〜(3c)の
ように略記する。）の電位を水平電極片(1b)〜(3d)の電
位より低い電位にすると、各電子ビーム(10B),(10G),(1
0R)（以下、(10)と略記する。）に、それぞれ上下方向
に引かれる電気力が作用し、円形であつた各電子ビーム
(10)の断面形状は、縦長のだ円形に変形する。Each vertical electrode piece of the quadrupole electrode (20) configured in this way
(1a), (1c), (2a), (2c), (3a), (3c) (hereinafter, abbreviated as (1a) ~ (3c)) potential of the horizontal electrode piece (1b) ~. When the potential is lower than that of (3d), each electron beam (10B), (10G), (1
(0R) (hereinafter abbreviated as (10)), each of which is a circular electron beam caused by an electric force pulled in the vertical direction.
The cross-sectional shape of (10) is transformed into a vertically elongated ellipse.
逆に、水平電極片(1b)〜(3d)の電位を垂直電極片(1a)〜
(3c)の電位より低くすると、各電子ビーム(10)の断面形
状は横長のだ円形に変形し、水平・垂直両電極片の電位
が同じときは、各電子ビーム(10)の断面形状は変形しな
い。Conversely, the potentials of the horizontal electrode pieces (1b) to (3d) are changed to the vertical electrode pieces (1a) to (3a).
When it is lower than the potential of (3c), the cross-sectional shape of each electron beam (10) is transformed into a horizontally elongated ellipse, and when the potentials of both horizontal and vertical electrode pieces are the same, the cross-sectional shape of each electron beam (10) becomes Does not deform.
したがつて、垂直電極片(1a)〜(3c)と、水平電極片(1b)
〜(3d)との間に、偏向磁界に同期しており、かつ、当該
偏向磁界によつて各電子ビーム(10)がうける偏向収差を
補正する電圧波形をもつ補正用の電圧を印加すれば、偏
向収差を効果的に補正して、螢光面の全面にわたつて真
円に近いスポツト形状を得ることができる。Therefore, vertical electrode pieces (1a) to (3c) and horizontal electrode pieces (1b)
Between (3d) and (3d), if a correction voltage having a voltage waveform that is synchronized with the deflection magnetic field and that corrects the deflection aberration that each electron beam (10) receives by the deflection magnetic field is applied. The deflection aberration can be effectively corrected to obtain a spot shape close to a perfect circle over the entire surface of the fluorescent surface.
しかし、上記のように構成された四極電極(1)，(2)，
(3)では、両側の四極電極(1)，(3)の内側の隙間(1e)，
(3e)から、中央の四極電極(2)の電荷の影響をうけ、第
５図に示したように、電子ビーム(10B)，(10R)が通る中
心線付近の電界が、中心線を通る垂直面に対して非対称
分布となり、電子ビーム(10B),(10R)のコンバーゼンス
がずれ、さらに、四極電極に印加する電圧を変えると、
これにともなつて電子ビーム(10B),(10R)のコンバーゼ
ンスもずれるという問題点があつた。However, the quadrupole electrodes (1), (2), configured as described above,
In (3), the gap (1e) inside the quadrupole electrodes (1) and (3) on both sides,
From (3e), under the influence of the electric charge of the central quadrupole electrode (2), as shown in FIG. 5, the electric field near the center line through which the electron beams (10B) and (10R) pass passes through the center line. Asymmetric distribution with respect to the vertical plane, the convergence of the electron beams (10B), (10R) shifts, and when the voltage applied to the quadrupole electrode is changed,
Along with this, there was a problem that the convergence of the electron beams (10B) and (10R) also shifted.
この発明は、上記のような問題点を解消するためになさ
れたもので、偏向収差を補正するとともに、この補正に
よつてはコンバーゼンスのずれを生じない四局電極を備
えたインライン形電子銃を得ることを目的とする。The present invention has been made in order to solve the above-mentioned problems, and corrects the deflection aberration, and by this correction, an in-line type electron gun equipped with a four-station electrode that does not cause a deviation in convergence is provided. The purpose is to get.
この発明に係る一線に並んだ３つの四極電極は、中央の
四極電極を軸対称形に構成するとともに、両側の四極電
極の電子ビームが通る中心線付近の電界分布が当該中心
線を通る垂直面に対して対称形となるように、当該両側
の四極電極を構成する電極片を上記垂直面に対して非対
称形に形成したものである。The three quadrupole electrodes arranged in a line according to the present invention are configured such that the central quadrupole electrode has an axially symmetrical shape, and the electric field distribution in the vicinity of the center line through which the electron beams of the quadrupole electrodes on both sides pass through the center line. The electrode pieces constituting the quadrupole electrodes on both sides are formed asymmetrically with respect to the vertical plane so as to be symmetrical with respect to.
この発明における両側の四極電極は、中央の四極電極か
ら受ける影響が相殺されて、中心線付近の電界分布が対
称形になるので、偏向収差が補正されるとともに、四極
電極に印加する電位を変えてもコンバーゼンスが一定に
保たれる。In the quadrupole electrodes on both sides in the present invention, the influence exerted by the central quadrupole electrode is canceled and the electric field distribution near the center line becomes symmetrical, so that the deflection aberration is corrected and the potential applied to the quadrupole electrode is changed. However, the convergence is kept constant.
以下、この発明の実施例を図について説明する。第１図
はこの発明の一実施例の縦断面図で、第５図に示した電
子銃とほぼ同様に構成されているので、以下、相違する
点を説明する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, which has a structure similar to that of the electron gun shown in FIG. 5, so that the points of difference will be described below.
第２図はこの実施例の要部である四極電極の構成を示す
第１図II−II線矢視断面図である。図において、水平電
極片(1b),(1d),(3b),(3d)は、(2b)，(2d)よりは狭い幅
に形成し、外側にずらして配設したものである。FIG. 2 is a sectional view taken along the line II-II in FIG. 1 showing the structure of the quadrupole electrode which is the main part of this embodiment. In the figure, the horizontal electrode pieces (1b), (1d), (3b) and (3d) are formed to have a width narrower than that of (2b) and (2d) and are arranged so as to be shifted outward.
このように構成すると、垂直電極片(1a)，(3c)により形
成される電界が強まり、電子ビーム(10B)，(10R)が通る
中心線付近の電界分布が、第２図に示すように、当該中
心線を通る垂直面に対して対称形となるので、四極電極
に偏向収差を補正するための電圧を印加してもコンバー
ゼンスの変化が生じない。With this structure, the electric field formed by the vertical electrode pieces (1a) and (3c) is strengthened, and the electric field distribution near the center line through which the electron beams (10B) and (10R) pass is as shown in FIG. Since the shape becomes symmetrical with respect to the vertical plane passing through the center line, the convergence does not change even if the voltage for correcting the deflection aberration is applied to the quadrupole electrode.
なお、水平電極片(1b),(1d),(3b),(3d)の幅を狭くする
かわりに、それぞれ外側にずらせて有効幅を狭くしても
同様の効果が得られる。In addition, instead of narrowing the width of the horizontal electrode pieces (1b), (1d), (3b), (3d), the same effect can be obtained by shifting the horizontal electrode pieces (1b), (1d), (3b), and (3d) outward to reduce the effective width.
第３図はこの発明の他の実施例の要部である四極電極を
示す断面図で、第２図に相当する図である。FIG. 3 is a sectional view showing a quadrupole electrode which is a main part of another embodiment of the present invention, and is a view corresponding to FIG.
この実施例は、垂直電極片(1a)，(3c)の幅を狭くして中
心線を通るＸ線上に配設したものである。In this embodiment, the vertical electrode pieces (1a) and (3c) are narrowed in width and arranged on the X-ray passing through the center line.
このように構成すると、垂直電極片(1a)，(3c)が作る電
界が弱まり、第３図に示すように、電子ビーム(10B),(1
0R)が通る中心付近の電界分布が当該中心線を通る垂直
面に対して対称形となり、前記実施例と同様の効果が得
られる。With this structure, the electric fields created by the vertical electrode pieces (1a) and (3c) are weakened, and as shown in FIG.
The electric field distribution near the center through which (0R) passes is symmetrical with respect to the vertical plane passing through the center line, and the same effect as that of the above embodiment can be obtained.
なお、上記実施例では、四極電極(1)，(2)，(3)を構成
する垂直・水平電極片をいずれも平板状に形成した例を
示したが、円弧，だ円，双曲線，放物線などの一部をと
つた曲面板であつてもよい。In the above embodiments, the vertical and horizontal electrode pieces constituting the quadrupole electrodes (1), (2), and (3) are all formed in a flat plate shape, but the circular arc, the ellipse, the hyperbola, and the parabola are shown. It may be a curved plate having a part of the above.
また、上記実施例ではビームスポツト形状を縦長もしく
は横長の楕円にすることにより、ビームスポツト径を最
小に保ち全面性を向上させたが、四極電極は中間電極で
あつてもよく、四極電極の前後に形成される静電型レン
ズによりダイナミツクフオーカスとしても効果を奏する
ため、スクリーン上のすべての点で最良のフオーカスを
保つことができる。Further, in the above-mentioned embodiment, the beam spot shape is made vertically long or horizontally long to improve the overall surface property while keeping the beam spot diameter to a minimum, but the quadrupole electrode may be an intermediate electrode, and the quadrupole electrode Since the electrostatic type lens formed in 1 is effective as a dynamic focus, the best focus can be maintained at all points on the screen.
以上のように、この発明によれば、両側の四極電極を、
電子ビームが通る中心線を通る垂直面に対し非対称形に
構成し、当該両側の四極電極内の中心線付近の電界分布
を、上記垂直面に対して対称形となるように構成したの
で、四極電極に偏向収差を補正する電圧波形をもつ補正
用の電圧を印加して偏向収差を補正することができると
ともにこの補正によつては、電子ビームのコンバーゼン
スが変化しない電子銃が得られる効果がある。As described above, according to the present invention, the quadrupole electrodes on both sides are
Since the quadrupole electrode is asymmetrical with respect to the vertical plane passing through the center line through which the electron beam passes, and the electric field distribution near the center line in the quadrupole electrodes on both sides is symmetrical with respect to the vertical plane, The deflection aberration can be corrected by applying a correction voltage having a voltage waveform for correcting the deflection aberration to the electrodes, and this correction has the effect of obtaining an electron gun in which the convergence of the electron beam does not change. .
【図面の簡単な説明】 第１図はこの発明の一実施例を示す縦断面図、第２図は
この実施例の要部である四極電極を示す第１図II−II線
矢視断面図、第３図はこの発明の他の実施例の要部であ
る四極電極を示す断面図、第４図はこの発明の基となつ
た新らたな四極電極を備えた電子銃の縦断面図、第５図
は第４図Ｖ−Ｖ線矢視断面図、第６図は従来の四極レン
ズを形成する電極の一部破断斜視図である。 (1)，，(2)，(3)……四極電極、(1a),(1c),(2a),(2c),
(3a),(3c)……垂直電極片、(1b),(1d),(2b),(2d),(3b),
(3d)……水平電極片、(9)……インライン形電子銃、(10
B),(10G),(10R)……電子ビーム。 なお、各図中、同一符号は同一または相当部分を示す。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II-II in FIG. 1 showing a quadrupole electrode which is a main part of this embodiment. FIG. 3 is a sectional view showing a quadrupole electrode which is a main part of another embodiment of the present invention, and FIG. 4 is a longitudinal sectional view of an electron gun equipped with a new quadrupole electrode which is the basis of the present invention. FIG. 5 is a sectional view taken along the line VV in FIG. 4, and FIG. 6 is a partially cutaway perspective view of electrodes forming a conventional quadrupole lens. (1) 、、 (2) 、 (3) …… Quadrupole electrode, (1a), (1c), (2a), (2c),
(3a), (3c) ... vertical electrode pieces, (1b), (1d), (2b), (2d), (3b),
(3d) …… horizontal electrode piece, (9) …… in-line electron gun, (10
B), (10G), (10R) ... Electron beam. In each drawing, the same reference numerals indicate the same or corresponding parts.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8262786AJPH0622101B2 (en) | 1986-04-08 | 1986-04-08 | Inline electron gun |
| DE8787302872TDE3775253D1 (en) | 1986-04-03 | 1987-04-02 | CATHODE RAY TUBE. |
| EP87302872AEP0241218B1 (en) | 1986-04-03 | 1987-04-02 | Cathode ray tube apparatus |
| KR1019870003185AKR900006173B1 (en) | 1986-04-03 | 1987-04-03 | Cathode ray tube device |
| US07/295,883US4886999A (en) | 1986-04-03 | 1989-01-11 | Cathode ray tube apparatus with quadrupole electrode structure |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8262786AJPH0622101B2 (en) | 1986-04-08 | 1986-04-08 | Inline electron gun |
| Publication Number | Publication Date |
|---|---|
| JPS62237646A JPS62237646A (en) | 1987-10-17 |
| JPH0622101B2true JPH0622101B2 (en) | 1994-03-23 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8262786AExpired - LifetimeJPH0622101B2 (en) | 1986-04-03 | 1986-04-08 | Inline electron gun |
| Country | Link |
|---|---|
| JP (1) | JPH0622101B2 (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667244A (en)* | 2009-10-19 | 2012-09-12 | 株式会社安川电机 | Transmission mechanism for nonparallel axes, and robot |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667244A (en)* | 2009-10-19 | 2012-09-12 | 株式会社安川电机 | Transmission mechanism for nonparallel axes, and robot |
| Publication number | Publication date |
|---|---|
| JPS62237646A (en) | 1987-10-17 |
| Publication | Publication Date | Title |
|---|---|---|
| KR900006173B1 (en) | Cathode ray tube device | |
| EP0485515B1 (en) | Method and apparatus for controlling dynamic convergence of a plurality of electron beams of a color cathode ray tube | |
| JPH0427656B2 (en) | ||
| JPS6199249A (en) | Picture tube apparatus | |
| JPH0831333A (en) | Color cathode ray tube | |
| JPH053695B2 (en) | ||
| JPH0795429B2 (en) | Color display system | |
| JP2616844B2 (en) | Color cathode ray tube | |
| GB2154789A (en) | Color picture tube having an inline electron gun with built-in stigmator | |
| JPH07134953A (en) | Color picture tube | |
| JPH0510787B2 (en) | ||
| JPH07226170A (en) | Electron gun for color cathode ray tube | |
| US6642646B1 (en) | Electron gun for color cathode ray tubes with side electron-beam-passing apertures of plurality of circular arcs having different radii of curvature | |
| US5506468A (en) | Electron gun for color cathode-ray tube | |
| US6456017B1 (en) | Electron gun for cathode ray tube | |
| JPH0272546A (en) | Electron gun for color picture tube | |
| JPH0622101B2 (en) | Inline electron gun | |
| JP3580568B2 (en) | Color picture tube | |
| JPS63166126A (en) | Cathode-ray tube | |
| JPS58192252A (en) | Cathode-ray tube device | |
| JPH05135709A (en) | Cathode-ray tube | |
| JPH0680580B2 (en) | Inline electron gun | |
| JPH067144U (en) | Inline electron gun | |
| JP3742122B2 (en) | In-line electron gun for color picture tubes | |
| JPH10106452A (en) | Color cathode-ray tube electron gun |
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |