JPH0127252Y2 - - Google Patents

Info

Publication number
JPH0127252Y2
JPH0127252Y2 JP1979158307U JP15830779U JPH0127252Y2 JP H0127252 Y2 JPH0127252 Y2 JP H0127252Y2 JP 1979158307 U JP1979158307 U JP 1979158307U JP 15830779 U JP15830779 U JP 15830779U JP H0127252 Y2 JPH0127252 Y2 JP H0127252Y2
Authority
JP
Japan
Prior art keywords
electrode
electron
electron gun
deflection yoke
main
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
Application number
JP1979158307U
Other languages
Japanese (ja)
Other versions
JPS5675461U (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1979158307U priority Critical patent/JPH0127252Y2/ja
Publication of JPS5675461U publication Critical patent/JPS5675461U/ja
Application granted granted Critical
Publication of JPH0127252Y2 publication Critical patent/JPH0127252Y2/ja
Expired legal-status Critical Current

Links

Description

【考案の詳細な説明】 この考案は、電磁偏向装置を備えた陰極線管電
子銃の改良に関するものである。
[Detailed Description of the Invention] This invention relates to an improvement of a cathode ray tube electron gun equipped with an electromagnetic deflection device.

本考案の理解を容易にするため従来用いられて
いるカラー陰極線管インライン型電子銃について
説明する。第1図はインライン型電子銃を用いた
カラー陰極線管の縦断面図である。インライン型
電子銃1から発射された一直線上に整列して同一
平面内にある三本のインライン電子ビームは、排
気されたガラス外囲器2の漏斗状部に配設された
電磁偏向装置(以下偏向ヨークと呼ぶ)5により
水平及び垂直に偏向され、ガラス外囲器2の前部
に、その内側は複数個の赤、緑及び青に発光する
螢光体素子が被着された螢光面3上に走査画面を
形成する。この管内に螢光面3に隣接し有孔マス
ク4からなる色選別機構が配置され、各走査電子
ビームは夫々の電子ビームに対応する色の螢光体
素子だけを刺激するようになつている。
In order to facilitate understanding of the present invention, a conventionally used color cathode ray tube in-line electron gun will be explained. FIG. 1 is a longitudinal sectional view of a color cathode ray tube using an in-line electron gun. The three in-line electron beams emitted from the in-line electron gun 1 are aligned on a straight line and lie in the same plane, and the three in-line electron beams emitted from the in-line electron gun 1 are placed in an electromagnetic deflection device (hereinafter referred to as A phosphor surface is deflected horizontally and vertically by a deflection yoke 5, and on the front part of the glass envelope 2, a plurality of phosphor elements emitting red, green, and blue are coated on the inside thereof. A scanning screen is formed on 3. A color selection mechanism consisting of a perforated mask 4 is disposed within this tube adjacent to the phosphor surface 3 so that each scanning electron beam stimulates only the phosphor elements of the color corresponding to the respective electron beam. .

第2図は一例として、上記カラー陰極線管に用
いられる主電子レンズがバイ・ポテンシヤル・フ
オーカス方式を採るインライン型電子銃の構成を
示したものであり、その電極構体は互に絶縁され
て等間隔距離を保つて一列に整列した三つの陰極
構体11と、これに対向して電子ビーム進行方向
に順次配置されるG1電極12、G2電極13、G3
電極14、G4電極15、及び遮蔽磁極16から
構成され、遮蔽磁極16を除く各電極は図示され
ないが各電極支持部を介して絶縁物支持杆17に
融着固定されて、所定の電極間隔を保持してい
る。この場合G3電極14とG4電極15とで主電
子レンズであるバイ・ポテンシヤル・フオーカス
レンズを形成している。
Figure 2 shows, as an example, the configuration of an in-line electron gun used in the above-mentioned color cathode ray tube, in which the main electron lens adopts a bipotential focus method, and the electrode structures are insulated from each other and spaced at equal intervals. Three cathode assemblies 11 arranged in a line while keeping a distance from each other, and a G1 electrode 12, a G2 electrode 13, and a G3 electrode arranged in sequence in the electron beam traveling direction facing the cathode structures 11.
Consisting of an electrode 14, a G4 electrode 15, and a shielding magnetic pole 16, each electrode except the shielding magnetic pole 16 is fused and fixed to an insulator support rod 17 via each electrode support part, and a predetermined electrode spacing is maintained. keeping. In this case, the G3 electrode 14 and the G4 electrode 15 form a bipotential focus lens which is the main electron lens.

ガラス外囲器2の漏斗状部に続くネツク部に封
止された電子銃構体1の偏向ヨーク5側には、静
コンバージエンス装置6が配置され、電子銃構体
1の組立誤差等に基づく螢光面中心に於ける小さ
な誤差を補正出来るようになつている。更に静コ
ンバージエンス装置6に隣接して、三本の電子ビ
ームが夫々対応する色の螢光体素子を正しく刺激
するように補正する色純化装置7が配置されてい
る。電子銃構体1から発射された三本の電子ビー
ムは、電子ビーム位置補正装置による補正と、水
平偏向磁界を糸巻型歪、垂直偏向磁界を樽型歪と
なる磁界分布を発生する偏向ヨーク5の組合せで
正しく三色の画像が重ね合せられた再生画像が得
られる。
A static convergence device 6 is disposed on the deflection yoke 5 side of the electron gun assembly 1, which is sealed in the neck part following the funnel-shaped part of the glass envelope 2. It is designed to correct small errors in the center of the optical surface. Furthermore, a color purification device 7 is arranged adjacent to the static convergence device 6 to correct the three electron beams so that they correctly stimulate the phosphor elements of the corresponding colors. The three electron beams emitted from the electron gun assembly 1 are corrected by an electron beam position correction device and a deflection yoke 5 that generates a magnetic field distribution in which the horizontal deflection magnetic field has pincushion distortion and the vertical deflection magnetic field has barrel distortion. By combining these, a reproduced image in which images of three colors are correctly superimposed can be obtained.

然るに合成再生画像を高解像度とするために
は、電子銃構体1の主電子レンズで電子ビームを
細く絞る必要があり、このために主電子レンズに
は球面収差等に対し低収差、低結像倍率、長焦点
距離等を具備した高性能の集束特性が必要とな
る。これらに対して従来各種の改良、改善が行わ
れて来た。然しながら上述の主電子レンズの特性
が改善されても、電子レンズの集束特性を劣化さ
せる要因として偏向ヨーク5の後端漏洩磁界の電
子レンズへの影響がある。即ち、第1図に示す様
に、偏向ヨーク5の後端漏洩磁界51が主電子レ
ンズ電界を形成するG4電極15、G3電極14及
びその両電極間隙に浸入し、磁界の電子ビームに
対する作用で主電子レンズ電界で決まる電子ビー
ムの径路を乱して主電子レンズに磁界による収差
を生ぜしめ解像度を劣化させることになる。特に
電子ビーム電流が多い時に電子レンズの収差によ
り電子ビームスポツトの周囲に薄く輝くハローが
発生し解像度を著しく劣化させる。
However, in order to achieve high resolution of the synthesized reproduced image, it is necessary to focus the electron beam narrowly with the main electron lens of the electron gun assembly 1, and for this purpose, the main electron lens has a structure with low aberrations and low image formation against spherical aberrations, etc. High performance focusing characteristics with magnification, long focal length, etc. are required. Conventionally, various improvements and improvements have been made to these. However, even if the characteristics of the main electron lens described above are improved, the influence of the leakage magnetic field at the rear end of the deflection yoke 5 on the electron lens is a factor that deteriorates the focusing characteristics of the electron lens. That is, as shown in FIG. 1, the leakage magnetic field 51 at the rear end of the deflection yoke 5 enters the G4 electrode 15, the G3 electrode 14, which forms the main electron lens electric field, and the gap between the two electrodes, and the magnetic field acts on the electron beam. This disturbs the path of the electron beam determined by the electric field of the main electron lens, causes aberrations in the main electron lens due to the magnetic field, and degrades resolution. Particularly when the electron beam current is large, the aberration of the electron lens causes a faint halo to appear around the electron beam spot, significantly deteriorating the resolution.

本考案は、上述の欠点を除去した高性能の陰極
線管電子銃構体を提供することである。
The object of the present invention is to provide a high-performance cathode ray tube electron gun assembly that eliminates the above-mentioned drawbacks.

本考案は、偏向ヨーク後端漏洩磁界の主電子レ
ンズ電界への浸入を防止するために電子ビーム射
出側と反対側の偏向ヨーク側に近い主電子レンズ
電極及びその間隙を包括的に、磁気的、且つ静電
的に遮蔽する手段を備えたことを特徴とする。
In order to prevent the leakage magnetic field from the rear end of the deflection yoke from entering the electric field of the main electron lens, the main electron lens electrode and the gap therebetween, which are close to the deflection yoke side opposite to the electron beam exit side, are magnetically , and includes means for electrostatically shielding.

第3図は本考案の一実施例を示す電子銃電極構
体10の構成図である。以下説明の簡略化のため
に従来と同一のものには同一の符号をつける。1
8は鉄−ニツケル合金であるパーマロイ等の導電
性で高透磁率磁性材で円環状に形成された磁気遮
蔽板であり、バイ・ポテンシヤル・フオーカス方
式の主電子レンズを形成するG4電極15、G3電
極14のG4電極15に対向する側の一部及び両
電極間隙の周囲を覆い、且つ遮蔽磁極16の底面
近い筒側部に固定されている。
FIG. 3 is a configuration diagram of an electron gun electrode assembly 10 showing an embodiment of the present invention. Hereinafter, for the purpose of simplifying the explanation, the same reference numerals are given to the same parts as in the prior art. 1
8 is a magnetic shielding plate formed in an annular shape from a conductive and high permeability magnetic material such as permalloy, which is an iron-nickel alloy, and G4 electrode 15, G3 forming a main electron lens of a bi-potential focusing system. It covers a part of the side of the electrode 14 facing the G4 electrode 15 and the periphery of the gap between the two electrodes, and is fixed to the cylindrical side near the bottom of the shielding magnetic pole 16.

本実施例によれば主電子レンズ電界を形成する
G4電極15、G3電極14及びその電極間隙を包
括的に磁気遮蔽板18で覆つてあるため偏向ヨー
ク5の後端漏洩磁界51はこれらの主電子レンズ
電界内に浸入することはない。従がつて電子ビー
ムには余分の磁界の影響は除去されて、主電子レ
ンズ本来の機能が十分発揮され、高電流時にハロ
ーが発生して螢光面上の再生画像の解像度が劣化
することはなくなる。
According to this embodiment, the main electron lens electric field is formed.
Since the G4 electrode 15, the G3 electrode 14, and the gap between the electrodes are comprehensively covered with the magnetic shielding plate 18, the rear end leakage magnetic field 51 of the deflection yoke 5 does not enter into the main electron lens electric field. Therefore, the influence of extra magnetic field is removed from the electron beam, and the original function of the main electron lens is fully demonstrated, and the resolution of the reproduced image on the fluorescent surface will not deteriorate due to the formation of a halo at high currents. It disappears.

更にG4電極15とG3電極14間を導電性の磁
性材で覆つてあるため主電子レンズ電界に浸入す
る外部電界に対しても遮蔽効果があり、電子銃構
体10の封止されたガラス外囲器2のネツク部内
壁に帯電した電荷が形成する不安定な電界の浸入
は静電遮蔽され、三色が重ね合せられた再生画像
が時間の経過と共にずれるコンバージエンスの経
時変化も同時に防止する効果も合せ持つ。
Furthermore, since the gap between the G4 electrode 15 and the G3 electrode 14 is covered with a conductive magnetic material, it has a shielding effect against external electric fields penetrating the main electron lens electric field, and the sealed glass outer envelope of the electron gun assembly 10 has a shielding effect. The penetration of the unstable electric field formed by the charges on the inner wall of the neck part of the vessel 2 is electrostatically shielded, and the effect of simultaneously preventing changes in convergence over time, where the reproduced image in which three colors are superimposed shifts over time. Also have.

上述の説明では主電子レンズがバイ・ポテンシ
ヤル・フオーカス方式の電子銃について述べた
が、他の方式の主電子レンズを備えた電子銃構体
にも適用出来ることはいうまでもない。
Although the above description has been made regarding an electron gun in which the main electron lens is of a bi-potential focus type, it goes without saying that the present invention can also be applied to an electron gun assembly having a main electron lens of other types.

上述の様に本考案によれば、電子ビーム射出側
と反対の偏向ヨーク側に近い主電子レンズ電極、
及びその電極間隙を導電性磁性材で包括的に偏向
ヨーク後端漏洩磁界を磁気遮蔽すると同時に静電
遮蔽出来るため電子レンズの特性は劣化すること
なく、又カラー陰極線管の場合にはコンバージエ
ンスの経時変化も防止出来る。
As described above, according to the present invention, the main electron lens electrode near the deflection yoke side opposite to the electron beam exit side;
And the gap between the electrodes can be comprehensively shielded magnetically and electrostatically from the leakage magnetic field at the rear end of the deflection yoke by using a conductive magnetic material, so that the characteristics of the electron lens do not deteriorate, and in the case of color cathode ray tubes, the convergence Changes over time can also be prevented.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はカラー陰極線管の縦断面図、第2図は
カラー陰極線管に用いられるバイ・ポテンシヤ
ル・フオーカス方式電子銃構体の側面図、第3図
は本考案の一実施例を示す電子銃構体の側面図で
ある。 1……インライン電子銃構体、2……ガラス外
囲器、3……螢光面、5……偏向ヨーク、51…
…偏向ヨーク後端漏洩磁界、14……G3電極、
15……G4電極、18……磁気遮蔽板。
Fig. 1 is a longitudinal sectional view of a color cathode ray tube, Fig. 2 is a side view of a bipotential focus type electron gun assembly used in a color cathode ray tube, and Fig. 3 is an electron gun assembly showing an embodiment of the present invention. FIG. DESCRIPTION OF SYMBOLS 1... In-line electron gun structure, 2... Glass envelope, 3... Fluorescent surface, 5... Deflection yoke, 51...
...Deflection yoke rear end leakage magnetic field, 14...G3 electrode,
15...G4 electrode, 18...magnetic shielding plate.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電子ビーム射出側と反対の偏向ヨーク側に近い
主電子レンズ形成電極及びその電極間隙の周囲を
電子銃電極構体に固定された導電性磁性材で包括
的に磁気的且つ静電気的に遮蔽したことを特徴と
する陰極線管電子銃構体。
The main electron lens forming electrode near the deflection yoke side opposite to the electron beam exit side and the periphery of the electrode gap are comprehensively magnetically and electrostatically shielded with a conductive magnetic material fixed to the electron gun electrode structure. Characteristic cathode ray tube electron gun structure.
JP1979158307U 1979-11-15 1979-11-15 Expired JPH0127252Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1979158307U JPH0127252Y2 (en) 1979-11-15 1979-11-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1979158307U JPH0127252Y2 (en) 1979-11-15 1979-11-15

Publications (2)

Publication Number Publication Date
JPS5675461U JPS5675461U (en) 1981-06-19
JPH0127252Y2 true JPH0127252Y2 (en) 1989-08-15

Family

ID=29669555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1979158307U Expired JPH0127252Y2 (en) 1979-11-15 1979-11-15

Country Status (1)

Country Link
JP (1) JPH0127252Y2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5233258B2 (en) * 1973-07-16 1977-08-26

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS553642Y2 (en) * 1975-08-29 1980-01-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5233258B2 (en) * 1973-07-16 1977-08-26

Also Published As

Publication number Publication date
JPS5675461U (en) 1981-06-19

Similar Documents

Publication Publication Date Title
CA1159874A (en) Deflection yoke comprising magnetically permeable members forming a pincushion shape field within the neck of a crt
CA1213304A (en) Color image display systems
US4057747A (en) In-line plural beam color cathode ray tube having deflection defocus correcting elements
CA1124304A (en) Deflection yoke with a magnet for reducing sensitivity of convergence to yoke position
US4443736A (en) Electron gun for dynamic beam shape modulation
US4528476A (en) Cathode-ray tube having electron gun with three focus lenses
US4386331A (en) Deflection yoke
US4520292A (en) Cathode-ray tube having an asymmetric slot formed in a screen grid electrode of an inline electron gun
US4523123A (en) Cathode-ray tube having asymmetric slots formed in a screen grid electrode of an inline electron gun
JPS63166126A (en) Cathode-ray tube
JPH0127252Y2 (en)
JPH0533494B2 (en)
US4634923A (en) Color picture tube having improved electron gun
JPS6258102B2 (en)
JP2636217B2 (en) Color television display tube
EP0310242B1 (en) Colour display system including a self-converging deflection yoke providing raster distortion correction
US4723094A (en) Color picture device having magnetic pole pieces
JPH026188B2 (en)
EP0348912A2 (en) Color cathode ray tube apparatus
JP2957604B2 (en) Color picture tube equipment
JPS5824372Y2 (en) Denshiji Yukoutai
JP2859900B2 (en) Color picture tube
JPS58818B2 (en) color picture tube
JPH0354420B2 (en)
KR810000017B1 (en) Self-converging color television display system