JPH0275135A - Beam spot correcting device - Google Patents
Beam spot correcting deviceInfo
- Publication number
- JPH0275135A JPH0275135A JP22461488A JP22461488A JPH0275135A JP H0275135 A JPH0275135 A JP H0275135A JP 22461488 A JP22461488 A JP 22461488A JP 22461488 A JP22461488 A JP 22461488A JP H0275135 A JPH0275135 A JP H0275135A
- Authority
- JP
- Japan
- Prior art keywords
- correction coil
- correcting device
- correction
- coil
- pole
- 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.)
- Pending
Links
- 238000010894 electron beam technology Methods 0.000 claims abstract description 23
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、インライン配列の６電子銃を有するカラー受
像管に使用するビームスポット補正装置に係シ、特に横
方向に長い楕円形状のビームスポット歪の桶正に好適な
装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a beam spot correction device used in a color picture tube having six electron guns arranged in-line. This invention relates to a device suitable for strain relief.
従来の補正装置とじ℃は、特開昭５７−１６８４５５号
公報に記載のように、インライン配列電子銃の両端電子
ビームに歪を与える４極の電磁コイルと電極片で構成さ
れ、各両端電子ビームに対して互いに方向の異なる２′
！Ｍの磁界を印ヵｎするようＫをっていた。また、特公
昭５８〜１２９７５号公報に記載の装置においては、第
１および第２の補正用磁界発生手段にょ）、中心域子ビ
ーム軌道上に補正磁界を形成させるようになっていた。As described in Japanese Unexamined Patent Publication No. 57-168455, a conventional correction device is composed of a four-pole electromagnetic coil and an electrode piece that distort the electron beam at both ends of an in-line electron gun. 2' with different directions for
! K was set so as to imprint the magnetic field of M. Further, in the apparatus described in Japanese Patent Publication No. 58-12975, the first and second correction magnetic field generating means (1) are arranged to form a correction magnetic field on the trajectory of the central region beam.
上記従来技術のうち、前者については、両端電子ビーム
の歪を補正する手段であって、中心電子ビームによる歪
を補正することに関しては配慮されていなかった。また
、後者については、中心電子ビーム軌道上に補正磁界全
形成させる手段のため、几・Ｃｔ−Ｂｓ本の電子ビーム
が一点に交わる構造のブラウン管の場合を除き、−収約
な６本の電子ビームが異なる軌道上を通過する場合につ
いての配慮はされ【いなかった。Among the above-mentioned conventional techniques, the former is a means for correcting the distortion of the electron beams at both ends, and no consideration has been given to correcting the distortion caused by the central electron beam. Regarding the latter, since the correction magnetic field is entirely formed on the central electron beam trajectory, except for the case of a cathode ray tube with a structure in which the Ct-Bs electron beams intersect at one point, the convergent six electron beams No consideration was given to the case where the beams pass on different orbits.
上記目的は、インライン配列の６電子銃を有するカラー
ブラウン管の電子銃付近に、電子ビーム通過領域をはさ
んで上下に第１の補正装置としての８極の補正コイルを
設けるとともに、これよシ距離−の間隔をもって偏向ヨ
ーク後端付近の左右方向に、第２の補正装置としての４
極の補正コイルを設けるか、上記補助コイルのいずれか
一方もしくは両方の代）にマグネットを設ける構成とす
ることによ）、達成される。The above purpose is to provide an 8-pole correction coil as a first correction device above and below the electron beam passage area in the vicinity of the electron gun of a color cathode ray tube that has 6 electron guns in an in-line arrangement, and to 4 as a second correction device in the left and right direction near the rear end of the deflection yoke with an interval of -.
This can be achieved by providing a pole correction coil or by providing a magnet in place of one or both of the auxiliary coils.
カラーブラウン管の電子銃付近に、電子ビーム通過領域
をはさんで上下に第１の補正装置としての８種の補正コ
イルもしくはマグネットを設けることＫよシ、中央の４
億磁界で、中心電子ビーム束の左右端部で中心軸方向の
力を与えるように磁極を形成させて、水平方向のビーム
スポット幅全低減するように構成している。また、両端
の４億磁界で、両端電子ビーム束の中心軸側端部で外側
方向の力全与えるように磁極を形成させて、両端ビーム
スポットの中心軸側の片側部分の横幅を低減するように
構成している。さらに、これよル距離ｄの間隔をもって
偏向ヨーク後端付近の左右方向に第２の補正装置として
の４極の補正コイルもしくはマグネットを設けることに
より、両端電子ビームが十分に偏向された領域における
両端電子ビーム束の外側端部で内側方向の力を与えるよ
うに磁極を形成させて、両端ビームスポットの外側の片
側部分の横幅全低減するように構成している。Eight types of correction coils or magnets as the first correction device are installed above and below the electron beam passing area in the vicinity of the electron gun of the color cathode ray tube.
The beam spot width in the horizontal direction is completely reduced by forming magnetic poles so as to apply a force in the direction of the central axis at the left and right ends of the central electron beam flux using a magnetic field of 100 million yen. In addition, with the 400 million magnetic field at both ends, the magnetic poles are formed so as to apply the full force in the outward direction at the ends of the electron beam flux at both ends on the central axis side, thereby reducing the width of one side of the central axis side of the beam spot at both ends. It is composed of Furthermore, by providing a 4-pole correction coil or magnet as a second correction device in the left-right direction near the rear end of the deflection yoke at an interval of the deflection distance d, both ends of the electron beam are sufficiently deflected. A magnetic pole is formed so as to apply an inward force at the outer end of the electron beam flux, so that the width of one side of the outer side of the beam spot at both ends is completely reduced.
これＫより、３電子ビーム全ての横方向の幅を低減でき
るようにした。With this K, the width of all three electron beams in the lateral direction can be reduced.
以下、本発明の実施例を図を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図および第２図は、本発明の第１の実施例を示す図
であり、第１図は斜視図、第２図は側面図である。図中
、４は偏向ヨーク、１０は第１の補正装置である８極補
正コイル、１１は第２の補正装置である４億補正コイル
を示している。また、第６図ｆａ）には第１の補正装置
である８極補正コイルの正面図、第３図（ｂ）には第２
の補正装置である４極補正コイルの正面図である。同図
に示すように本発明のビームスポット補正装置は、カラ
ープラ・ ３ ・
ラン管１の電子銃２付近に、電子ビーム１６の通過領域
をはさんで磁極をもつように、水平（Ｘ）軸の上下位置
であって、垂直（Ｙ）軸よシの角度が概略２５°以内の
領域にＹ軸の両側で４極、合計８極の第１の補正装置で
ある８極補正コイル１０ヲ配設し、さらに、これと距離
ｄの間隔ｔ−あけて、偏向ヨーク４の後方に、Ｙ軸よル
の角度が概略６５゜以内の領域にＹ軸の左右で４極の第
２の補正装置である４極の補正コイル１１ヲ配設したも
のである。1 and 2 are diagrams showing a first embodiment of the present invention, with FIG. 1 being a perspective view and FIG. 2 being a side view. In the figure, 4 indicates a deflection yoke, 10 indicates an 8-pole correction coil as a first correction device, and 11 indicates a 400 million correction coil as a second correction device. In addition, Fig. 6fa) is a front view of the 8-pole correction coil, which is the first correction device, and Fig. 3(b) is a front view of the 8-pole correction coil, which is the first correction device.
FIG. 3 is a front view of a four-pole correction coil that is a correction device. As shown in the figure, the beam spot correction device of the present invention has a horizontal (X) magnetic pole near the electron gun 2 of the color plastic 3. An 8-pole correction coil 10, which is a first correction device with 4 poles on both sides of the Y-axis, and a total of 8 poles, is located above and below the axis and within an angle of approximately 25° from the vertical (Y) axis. Further, at a distance d and an interval t from the deflection yoke 4, a second correction pole of four poles is provided on the left and right sides of the Y axis in an area where the Y axis angle is approximately within 65 degrees. A four-pole correction coil 11, which is a device, is provided.
なお、上記した角度全設定しであるのは、ブラウン管の
ネック径：約２９鵡φ、電子銃の間隔：６．５騒の場合
、補正コイルの発生磁界が電子ビームの両端部に主に作
用するためである。The full angle setting described above is because when the neck diameter of the cathode ray tube is approximately 29 mm and the distance between the electron guns is 6.5 mm, the magnetic field generated by the correction coil mainly acts on both ends of the electron beam. This is to do so.
さて、一般にセル７コンバーゼンス方式の偏向ヨークの
場合、水平偏向コイル５の非均−伍界により、ブラウン
管画面上のビームスポット形状は、第４図に示すように
、画面中心部で円形であっても１面周辺部で横長方向に
楕円形に歪んだ形状となシ、解像度を劣化させる原因と
なっている。Generally speaking, in the case of a cell 7 convergence type deflection yoke, due to the nonuniformity of the horizontal deflection coil 5, the beam spot shape on the cathode ray tube screen is circular at the center of the screen, as shown in FIG. Also, the shape is distorted into an ellipse in the horizontal direction at the periphery of one surface, which causes resolution to deteriorate.
そこで、このビームスポット歪全改善するため、本発明
においては、第５図に示すように、第１の補正装置であ
る８極補正コイル１０全Ｘ軸の上下部に、第２の補正装
置である４極補正コイル１１金これよシ距離ｄの間隔を
あけて偏向ヨーク４の後方にＹ軸の左右方向に設置する
構成とした。これによ）、各補正コイルの作る磁力線１
８を第５図に示すように形成させる。すなわち、第１の
補正装置である８極補正コイル１０により、同図のＢ／
Ｇビーム間およびＧ／Ｒビー人間に略平行で互に逆方向
の磁力線１８ヲ形成させる。これにより、中心のＧｔ電
子ビーム両端で、同図に示すように中心軸方向に向う偏
向力１９が発生し、横方向に長い楕円形状のビームスポ
ット歪全低減する効果を有する。Therefore, in order to completely improve this beam spot distortion, in the present invention, as shown in FIG. A certain 4-pole correction coil 11 is arranged behind the deflection yoke 4 in the left-right direction of the Y-axis with a distance d between the four-pole correction coils. According to this), the magnetic field line 1 created by each correction coil
8 is formed as shown in FIG. That is, the 8-pole correction coil 10, which is the first correction device, allows the B/
Magnetic lines of force 18 are formed between the G beams and between the G and R beams, substantially parallel to each other and in opposite directions. As a result, a deflection force 19 is generated at both ends of the central Gt electron beam in the direction of the central axis, as shown in the figure, and has the effect of completely reducing the distortion of the horizontally long elliptical beam spot.
さらに、両端のＢ、几ビームに対しては、その内側部分
に相当する片 半面のみ、偏向力１９の作用を有する。Further, the deflecting force 19 acts on only one half of the inner beam B at both ends of the beam.
そして、これの外側部分に相当する片手間のビームスポ
ット差については、第１の補正装置である８極補正コイ
ル１０と距離ｄの間隔金あけて、第２の補正装置で必る
４極補正コイル１１を設けることにより補正する。ここ
で、距離どの間隔をもたせる理由は、第１の補正装置１
０の作る磁力線１８と相互干渉することを防止するため
で、このｄの値としては、ブラウン管のネック径（例え
ば、約２９膓）以上あれば良い。さらに、距離ｄの間隔
をあけることは、偏向ヨーク４の磁界によ）、ある程度
偏向されるため、第２の補正装置に電子ビームが接近し
、さらに補正効果を強めることになる。そして、この第
２の補正装置である４極補正コイル１１は、第５図中破
線で示すように構成され、Ｂ／几電子ビームの各々外側
で、同図に示す偏向力１９が作用し、最終的に両端のＢ
／几電電子一ムについても、横方向に長い楕円形状のビ
ームスポット歪を低減する効果を有する。これによシ、
第９図に示すように、従来発生していた第４図に示すビ
ームスポット歪を改善し、Ａ（Ａ”（Ａ”とすることか
できる。なお、各補正コイルの結線は第５図に示す通シ
で、水平偏向回路に結線しても良いし、直流を流す構成
としても良い。Regarding the beam spot difference between one hand, which corresponds to the outer part of this, a four-pole correction coil, which is required in the second correction device, is installed at a distance d from the eight-pole correction coil 10, which is the first correction device. This is corrected by providing 11. Here, the reason why the distance is determined is that the first correction device 1
This is to prevent mutual interference with the magnetic lines of force 18 created by the magnetic field, and the value of d should be equal to or larger than the neck diameter of the cathode ray tube (for example, about 29 mm). Further, since the electron beams are separated by the distance d, the electron beams are deflected to some extent (by the magnetic field of the deflection yoke 4), so that the electron beams approach the second correction device, further strengthening the correction effect. The quadrupole correction coil 11, which is the second correction device, is configured as shown by the broken line in FIG. Finally B at both ends
/The electronic beam also has the effect of reducing beam spot distortion of a horizontally long elliptical beam. For this,
As shown in Fig. 9, the beam spot distortion shown in Fig. 4, which occurred conventionally, can be improved and the beam spot distortion can be changed to A (A"(A"). The wiring of each correction coil is shown in Fig. 5. It may be connected to the horizontal deflection circuit as shown, or it may be configured to flow direct current.
第６図は、補正コイル１２の巻線位ｔを、磁性体１３の
脚部に行なったもので補正効果は同じである。In FIG. 6, the winding position t of the correction coil 12 is applied to the leg portion of the magnetic body 13, and the correction effect is the same.
また、第７図（ａ）、 （ｂ）は、本発明の他の実施例
を示すもので、補正コイル１２の代シにマグネット１４
を配設したものである。7(a) and 7(b) show another embodiment of the present invention, in which a magnet 14 is used instead of the correction coil 12.
is arranged.
そして、第８図は第７図（ｂ）のマグネット１４を、円
形のモールド品２０に組込んだ場合を示すもので、補正
装置が簡略化できるという長所を有する。FIG. 8 shows a case where the magnet 14 of FIG. 7(b) is assembled into a circular molded product 20, which has the advantage that the correction device can be simplified.
本発明によれば、セルフコンバーゼンス方式の偏向ヨー
クによって生じるビームスポットの歪ヲ、補正もしくは
低減することができるので、カン−テレビ、カラーデイ
スプレィの解像度を向上できる効果がある。According to the present invention, the distortion of the beam spot caused by the self-convergence type deflection yoke can be corrected or reduced, so that the resolution of canteen televisions and color displays can be improved.
第１図は、本発明の第１の実施例を示す斜視図、第２図
はその側面図、第３図（ａ）は第１の補正装置の正面図
、第６図（ｂ）は第２の補正装置の正面図、第４図は従
来のセルフコンバーゼンス方式偏向ヨークにより発生す
る画面上のビームスポット歪を示す説明図、第５図は本
発明の補正装置の正面図で補正効果を示す説明図、第６
図は補正コイルの位置を異ならせた場合の補正装置の正
面図、第７図（ａ）、 （ｂ）は本発明の他の実施例で
マグネットヲ使用した補正装置の正面図、第８図はマグ
ネットを使用した補正装置の斜視図、第９図は補正後の
ビームスポット形状を示す説明図である。
１−・・ブラウン管、２・・・電子銃、６・・・電極ビ
ン、４−・偏向ヨーク、５・・・水平偏向コイル、６−
・垂直偏向コイル、７・・・コア、８・・・ビエリテイ
、スタティック１グネツト構体、 ９−・・水平偏向回
路、１０−８極補正コイル装置、１１・・・４極補正コ
イル装置、１２−・補正コイル、１６・・・磁性体、１
４マグネツト。1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3(a) is a front view of the first correction device, and FIG. 6(b) is a front view of the first correction device. 2 is a front view of the correction device of No. 2, FIG. 4 is an explanatory diagram showing the beam spot distortion on the screen caused by the conventional self-convergence type deflection yoke, and FIG. 5 is a front view of the correction device of the present invention showing the correction effect. Explanatory diagram, No. 6
The figures are front views of correction devices with different positions of correction coils, FIGS. 7(a) and 7(b) are front views of correction devices using magnets in other embodiments of the present invention, and FIG. 8 9 is a perspective view of a correction device using a magnet, and FIG. 9 is an explanatory diagram showing a beam spot shape after correction. 1-... Braun tube, 2... Electron gun, 6... Electrode bin, 4-... Deflection yoke, 5... Horizontal deflection coil, 6-
・Vertical deflection coil, 7... Core, 8... Vierity, static 1 magnet structure, 9-... Horizontal deflection circuit, 10- 8-pole correction coil device, 11... 4-pole correction coil device, 12-・Correction coil, 16...magnetic material, 1
4 magnets.
Claims (1)
管の電子銃付近に、電子ビーム通過領域をはさんで上下
に第１の補正装置としての８極の補正コイルを設けると
ともに、これより距離ｄの間隔をもつて偏向ヨーク後端
部付近の左右方向に、第２の補正装置としての４極の補
正コイルを設けたことを特徴とするビームスポット補正
装置。1. An 8-pole correction coil as a first correction device is installed above and below the electron beam passage area in the vicinity of the electron gun of a color cathode ray tube having three electron guns in an in-line arrangement, and an 8-pole correction coil is installed as a first correction device at a distance d from this coil. A beam spot correction device characterized in that a four-pole correction coil as a second correction device is provided in the left-right direction near the rear end of the deflection yoke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22461488A JPH0275135A (en) | 1988-09-09 | 1988-09-09 | Beam spot correcting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22461488A JPH0275135A (en) | 1988-09-09 | 1988-09-09 | Beam spot correcting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0275135A true JPH0275135A (en) | 1990-03-14 |
Family
ID=16816477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22461488A Pending JPH0275135A (en) | 1988-09-09 | 1988-09-09 | Beam spot correcting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0275135A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992002033A1 (en) * | 1990-07-19 | 1992-02-06 | Rca Licensing Corporation | A deflection system with a pair of quadrupole arrangements |
| TR26331A (en) * | 1990-07-19 | 1995-03-15 | Rca Licensing Corp | ISIN BENEGI A CONTROLLED SYSTEM. |
| US5719476A (en) * | 1996-02-23 | 1998-02-17 | David Sarnoff Research Center, Inc. | Apparatus for correcting distortion of an electron beam generated spot on a cathode ray tube screen |
-
1988
- 1988-09-09 JP JP22461488A patent/JPH0275135A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992002033A1 (en) * | 1990-07-19 | 1992-02-06 | Rca Licensing Corporation | A deflection system with a pair of quadrupole arrangements |
| TR26331A (en) * | 1990-07-19 | 1995-03-15 | Rca Licensing Corp | ISIN BENEGI A CONTROLLED SYSTEM. |
| US5489824A (en) * | 1990-07-19 | 1996-02-06 | Rca Thomson Licensing Corporation | Deflection system with a controlled beam spot |
| CN1050442C (en) * | 1990-07-19 | 2000-03-15 | Rca许可公司 | Deflection system with controlled beam spot |
| US5719476A (en) * | 1996-02-23 | 1998-02-17 | David Sarnoff Research Center, Inc. | Apparatus for correcting distortion of an electron beam generated spot on a cathode ray tube screen |
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| JP3057720B2 (en) | Cathode ray tube | |
| JPH0739164Y2 (en) | Deflection yoke device | |
| JPH02267840A (en) | Deflection yoke structure | |
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| JPS6054144A (en) | Deflection york |