JPS62274534A - Deflection yoke device - Google Patents

Deflection yoke device

Info

Publication number
JPS62274534A
JPS62274534A JP11758686A JP11758686A JPS62274534A JP S62274534 A JPS62274534 A JP S62274534A JP 11758686 A JP11758686 A JP 11758686A JP 11758686 A JP11758686 A JP 11758686A JP S62274534 A JPS62274534 A JP S62274534A
Authority
JP
Japan
Prior art keywords
magnets
magnetic field
alignment
central axis
magnet
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
Application number
JP11758686A
Other languages
Japanese (ja)
Inventor
Toshinori Oda
俊則 小田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11758686A priority Critical patent/JPS62274534A/en
Publication of JPS62274534A publication Critical patent/JPS62274534A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To enable a minimum magnetic field on a central axis of two alignment magnets to be more lowerec, by positioning the peaks of the magnetic fields on a central plane between the two alignment magnets and then forming the peak magnetic fields to be equal and the field distributions to be symmetrical to the central plane. CONSTITUTION:Alignment magnets 19 are shaped in rings, two of which are magnetized from their insides on outsides. Magnetic fields on a central axis of the respective magnets 19 and 19 is adjusted so that their peaks are positioned on a central plane between both the magnets 19 and 19 with their values being equal and its distribution is shaped symmetrically in front and back of the central plane. Such magnetization of alignment magnets 19 enables the minimum magnetic field formed on the central axis of the two alignment magnets 19 to be lowered by about 0.5 gauss and to be one third or less of the previous value, in comparison with the conventional case where the alignment magnetic field is shaped symmetrically in front and back of the central planes of the respective alignment magnets themselves.

Description

【発明の詳細な説明】 3、発明の詳細な説明 (産業上の利用分野) 本発明は、撮像管、映像管等の熱陰極線管に用いられる
偏向ヨーク装置に関するものである。
Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a deflection yoke device used in a hot cathode ray tube such as an image pickup tube or a video tube.

(従来の技術) 従来の偏向ヨーク装置を撮像管装置に用いた場合につい
て説明すると、第3図に示すように、水平偏光コイル2
.垂直偏光コイル3を巻回したコイルボビン1の内部に
撮像管である熱陰極線管4が装着固定され、これら全体
を地磁気等の外部磁界からの影響を遮断するために、パ
ーマロイ等の磁性材料よりなる磁気シールドケース5内
に収容し、偏向ヨーク装置として、電子銃6からターゲ
ット部7へ向けて発射する電子ビーム8が撮像管軸と整
列するように電子ビーム発射角度の補正を行なうリング
状のアライメントマグネット9を2枚、スペーサ10等
を介して電子銃6上で並行にコイルボビンへ装着してい
る。このアライメントマグネット9は、フェライト樹脂
または金属磁性材料からなり、リングの内部または外部
より2極着磁して所要の着磁量を得、第5図に示す如く
リング内に磁束を得るようになっている。これによりマ
グネットの極を含むリング平面に垂直な中心軸上の磁界
分布は第4図に示すように、各マグネット9,9のそれ
ぞれ中心平面に左右対称となる。
(Prior Art) To explain the case where a conventional deflection yoke device is used in an image pickup tube device, as shown in FIG.
.. A hot cathode ray tube 4, which is an image pickup tube, is mounted and fixed inside a coil bobbin 1 around which a vertical polarization coil 3 is wound, and the whole is made of a magnetic material such as permalloy in order to block the influence of external magnetic fields such as earth's magnetism. A ring-shaped alignment device is housed in the magnetically shielded case 5 and serves as a deflection yoke device to correct the electron beam emission angle so that the electron beam 8 emitted from the electron gun 6 toward the target section 7 is aligned with the imaging tube axis. Two magnets 9 are attached to the coil bobbin in parallel on the electron gun 6 via a spacer 10 or the like. This alignment magnet 9 is made of ferrite resin or metal magnetic material, and is bipolarly magnetized from the inside or outside of the ring to obtain the required amount of magnetization, and to obtain magnetic flux within the ring as shown in FIG. ing. As a result, the magnetic field distribution on the central axis perpendicular to the ring plane including the magnet poles becomes symmetrical with respect to the respective central planes of the magnets 9, 9, as shown in FIG.

このようにして得られた等しい着磁量をもつ2枚のマグ
ネット9,9をコイルボビン1上で任意に回転調整する
ことにより、マグネット9の中心軸上の磁界の強弱およ
び回転位置の調整を可能とし、電子ビーム8の発射角度
の補正を行なっている。
By arbitrarily adjusting the rotation of the two magnets 9, 9 with the same amount of magnetization obtained in this way on the coil bobbin 1, it is possible to adjust the strength of the magnetic field on the central axis of the magnet 9 and the rotational position. The emission angle of the electron beam 8 is corrected.

マグネット9が4極以上の偶数の極を有する場合、4極
を代表例として説明すると、リング状マグネット内の磁
束は第6図に示すようになる。このような磁界分布を有
する着磁量の等しい2枚のマグネットを2枚回転調整す
ることにより、N→S極間の磁界の強弱および回転位置
の調整を可能として電子ビームのビーム形状補正、映像
管においてはミスコンバーゼンス補正を行なっている。
When the magnet 9 has an even number of poles, such as four or more, the magnetic flux within the ring-shaped magnet is as shown in FIG. 6, using four poles as a representative example. By rotating and adjusting two magnets with the same amount of magnetization and having such a magnetic field distribution, it is possible to adjust the strength and rotational position of the magnetic field between the N and S poles, correcting the beam shape of the electron beam and improving the image quality. In the tube, misconvergence correction is performed.

(発明が解決しようとする問題点) 上記のように1着磁量が等しい2枚のアライメントマグ
ネット9,9のN極の相対回転位置を180°反転して
最小磁界を構成しても、2枚のアライメントマグネット
9,9間に一定距離があり、中心軸上の各々のマグネッ
ト磁界のピークが一定距離だけずれるため、中心軸上で
は第4図に示すように大きな波状になり、完全なアライ
メントゼロ調整が不可能であった。
(Problem to be Solved by the Invention) As described above, even if the relative rotational positions of the N poles of the two alignment magnets 9, 9 having the same amount of magnetization are reversed by 180° to form the minimum magnetic field, the There is a certain distance between the alignment magnets 9, 9, and the peak of the magnetic field of each magnet on the central axis is shifted by a certain distance, resulting in a large wave shape on the central axis as shown in Figure 4, and perfect alignment. Zero adjustment was not possible.

4極以上の偶数の極を有する2枚のマグネットにおいて
も、2枚のマグネットの相対回転位置を360°/n(
n:極数)回転することにより、中心軸上のマグネット
磁界を最小に設定しても、2枚のマグネット間に一定距
離があり、各々のマグネットのピークが一定距離だけず
れるため、中心軸上のマグネット磁界は前記同様に波状
となり、完全なゼロ磁界調整が不可能となる。以下、4
極以上のマグネット2枚の組み合わせも2極マグネツト
と同様に扱えるので、以下2極マグネツトを用いた場合
について述べる。
Even in the case of two magnets having an even number of poles of 4 or more, the relative rotational position of the two magnets is 360°/n (
n: number of poles) By rotating, even if the magnetic field on the center axis is set to the minimum, there is a certain distance between the two magnets, and the peak of each magnet shifts by a certain distance, so the magnetic field on the center axis is The magnetic field of the magnet becomes wavy in the same manner as described above, and complete zero magnetic field adjustment becomes impossible. Below, 4
Since a combination of two magnets with more than one pole can be handled in the same way as a two-pole magnet, a case using a two-pole magnet will be described below.

上記の事柄は撮像管装置にあっては、電子ビーム8のア
ライメント補正量の極めて少なくてよい撮像管4に対し
ても余分なアライメント磁界が加わり、適切なアライメ
ント調整ができない。そのため、撮像管電子ビーム8が
ターゲット膜に管軸と傾斜をもって偏向、集束を行ない
、撮像管装置としての重要特性である解像度の低下2画
面色むら2図形歪の原因となる。
In the case of an image pickup tube device, the above-mentioned problem applies an extra alignment magnetic field to the image pickup tube 4, which requires only a very small amount of alignment correction for the electron beam 8, making it impossible to perform appropriate alignment adjustment. Therefore, the image pickup tube electron beam 8 is deflected and focused on the target film at an angle with the tube axis, which causes a reduction in resolution, color unevenness, and graphic distortion on the screen, which are important characteristics of an image pickup tube device.

また映像管においても電子ビームの補正量の極めて少な
くてよい映像管にするよう、2枚のマグネットを最小磁
界位置に調整しても、蛍光面においてセンタリング調整
が不可能な場合が発生する。
Furthermore, even if the two magnets are adjusted to the minimum magnetic field position in order to create a picture tube that requires only a very small amount of electron beam correction, there are cases where centering adjustment is not possible on the phosphor screen.

また4極以上の偶数極を有する2枚のマグネットの場合
も同様であり、最小磁界位置に設定しても、蛍光面にお
いてコンバーゼンス補正が十分行なえず、色ずれが発生
する。
The same applies to the case of two magnets having an even number of poles of 4 or more, and even if the magnetic field is set to the minimum magnetic field position, convergence correction cannot be performed sufficiently on the phosphor screen, resulting in color shift.

本発明は上記の点に鑑み、アライメントマグネットの中
心軸上での最小磁界を従来よりも十分小さく調整できる
ようにすることを目的とするものである。
In view of the above-mentioned points, it is an object of the present invention to make it possible to adjust the minimum magnetic field on the central axis of an alignment magnet to be sufficiently smaller than that of the prior art.

(問題点を解決するための手段) そこで本発明は、偶数極を有する2枚のリング状アライ
メントマグネットの中心軸上の磁界は。
(Means for Solving the Problems) Therefore, the present invention provides that the magnetic field on the central axis of two ring-shaped alignment magnets having an even number of poles is as follows.

これら2枚のアライメントマグネット間の2等分平面上
にそのピーク位置があり、かつピーク磁界の強さが等し
いと共に該磁界の分布を上記2等分平面に対してほぼ対
称となるようにしたものである。
The peak position is on the bisecting plane between these two alignment magnets, the strength of the peak magnetic field is equal, and the distribution of the magnetic field is almost symmetrical with respect to the bisecting plane. It is.

(作 用) 2枚のマグネットの中心軸上における磁界分布が、その
2枚のマグネット間の2等分平面上でピークになり、そ
の大きさが等しく且つ2等分平面に対してほぼ左右対称
としたので、中心軸上で2枚のマグネットの磁界分布は
ほぼ同形状になる。
(Function) The magnetic field distribution on the central axis of the two magnets peaks on the bisecting plane between the two magnets, and the magnitude is equal and almost symmetrical with respect to the bisecting plane. Therefore, the magnetic field distributions of the two magnets have almost the same shape on the central axis.

これにより2枚のマグネットのN極の回転相対回転位置
を360’/n反転することにより互いに打ち消し合い
、中心軸上での磁界を極めて小さくすることができる。
As a result, the relative rotational positions of the north poles of the two magnets are reversed by 360'/n, so that they cancel each other out, and the magnetic field on the central axis can be made extremely small.

(実施例) 一第1図は撮像管装置に用いた状態を示す本発明の実施
例の断面図、第2図(a)はその要部拡大図、第2図(
b)はマグネットの作る磁界分布図であって、樹脂成型
品からなるコイルボビン11に、水平偏光コイル12.
垂直偏光コイル13が装着され、コイルボビン11内に
は撮像管である熱陰極線管14が固定されている。地磁
気等の外部磁界による撮像管電子ビーム15への影響を
シールドするためにパーマロイ等の透磁率の高い磁性材
料の磁気シールドケース16がコイルボビン11の外周
を覆うよう取り付けられている。撮像管電子銃17より
ターゲットに向けて発射される電子ビーム15が撮像管
軸に整列するよう電子ビーム15の発射角度を補正する
ため、偏向ヨーク装置として、アライメントマグネット
19を2枚、コイルボビン11に撮像管カソード17上
で並行にスペーサ20等を介して装着したものであり、
このアライメントマグネット19はリング状をなし、厚
さ0.5+m〜3mm程度のフェライト樹脂または金属
磁性材料からなり、リングの内または外から2枚着磁さ
れており、第2図(b)に示すように、各マグネット1
9.19の中心軸上の磁界は、共にこれら両マグネット
19.19間の2等分平面上で磁界のピークを有し、か
つそのピークの値が等しく設定され、さらに上記2等分
平面に対してほぼ左右対称な磁界分布を有するようにな
されている。
(Example) - Fig. 1 is a sectional view of an embodiment of the present invention used in an image pickup tube device, Fig. 2(a) is an enlarged view of the main part thereof, and Fig. 2(a) is an enlarged view of the main part thereof.
b) is a magnetic field distribution diagram created by a magnet, in which horizontal polarizing coils 12.
A vertical polarizing coil 13 is attached, and a hot cathode ray tube 14, which is an image pickup tube, is fixed inside the coil bobbin 11. A magnetic shield case 16 made of a magnetic material with high magnetic permeability, such as permalloy, is attached to cover the outer periphery of the coil bobbin 11 in order to shield the image pickup tube electron beam 15 from the influence of external magnetic fields such as earth's magnetism. In order to correct the emission angle of the electron beam 15 so that the electron beam 15 emitted from the image pickup tube electron gun 17 toward the target is aligned with the image pickup tube axis, two alignment magnets 19 are attached to the coil bobbin 11 as a deflection yoke device. It is mounted in parallel on the image pickup tube cathode 17 via a spacer 20, etc.
This alignment magnet 19 is ring-shaped and made of ferrite resin or metal magnetic material with a thickness of about 0.5+m to 3mm, and two magnets are magnetized from the inside or outside of the ring, as shown in FIG. 2(b). so that each magnet 1
The magnetic field on the center axis of magnet 9.19 both has a magnetic field peak on the bisecting plane between these two magnets 19.19, and the values of the peaks are set equal, and furthermore, the magnetic field on the bisecting plane between these two magnets 19.19 is The magnetic field distribution is approximately symmetrical with respect to the left and right sides.

このようにアライメントマグネット19の着磁をしたこ
とにより、従来のように各々のアライメントマグネット
自体の中心平面に対して左右対称なアライメント磁界を
設定した場合に比べて中心軸上の2枚のアライメントマ
グネット19の作る最小磁界を、従来の約0.5ガウス
からその3分の1以下に小さくすることができるように
なった。
By magnetizing the alignment magnet 19 in this way, the two alignment magnets on the central axis can It has become possible to reduce the minimum magnetic field generated by 19 from about 0.5 gauss to less than one-third of the conventional value.

(発明の効果) 以上のように本発明によれば、2枚のマグネットの中心
軸上における磁界を極めて小さくできるので、電子ビー
ムのターゲットへのビーム収束が均一になり、撮像管装
置に用いた場合には、その重要な特性である画面解像度
の低下2色むら9図形歪を改善でき、撮像管と偏向装置
を組み合わせるベアリング率の向上にもつながり、また
映像管装置でセンタリング、コンバーゼンス補正用とし
て用いた場合においても、従来は最小磁界で補正できな
かった上記補正が可能となり、映像管として重要な性能
であるセンタリングずれ9色ずれの改善ができる。
(Effects of the Invention) As described above, according to the present invention, the magnetic field on the central axes of the two magnets can be made extremely small, so that the beam convergence of the electron beam on the target becomes uniform, making it possible to In some cases, it can improve the important characteristics of screen resolution, two-color unevenness, and graphic distortion, and it can also improve the bearing ratio of the combination of the image pickup tube and deflection device, and it can also be used for centering and convergence correction in the picture tube device. Even when used, the above-mentioned correction, which conventionally could not be corrected with the minimum magnetic field, becomes possible, and centering deviation and color deviation, which are important performances for a picture tube, can be improved.

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

第1図は撮像管装置に用いた状態を示す本発明の実施例
の断面図、第2図(a)はその要部拡大図、第2図(b
)は本発明装置のマグネットの磁界分布図、第3図は従
来の偏向ヨーク装置を用いた撮像管装置の断面図、第4
図(a)はその要部拡大図、第4図(b)は従来の偏向
ヨーク装置のマグネットの磁界分布図、第5図は2極を
有するマグネットの磁束を示す図、第6図は4極を有す
るマグネットの磁束を示す図である。 17・・・電子銃、 19・・・アライメントマグネッ
ト、 Φ1.Φ2・・・中心軸上の磁界。 特許出願人 松下電器産業株式会社 第1面 第2図 第3図 第4図 第5図 第6図
FIG. 1 is a sectional view of an embodiment of the present invention used in an image pickup tube device, FIG. 2(a) is an enlarged view of the main part, and FIG. 2(b)
) is a magnetic field distribution diagram of the magnet of the device of the present invention, FIG. 3 is a sectional view of an image pickup tube device using a conventional deflection yoke device, and FIG.
Figure (a) is an enlarged view of the main parts, Figure 4 (b) is a magnetic field distribution diagram of the magnet of the conventional deflection yoke device, Figure 5 is a diagram showing the magnetic flux of a magnet with two poles, and Figure 6 is a diagram showing the magnetic flux of a magnet with two poles. FIG. 3 is a diagram showing the magnetic flux of a magnet with poles. 17... Electron gun, 19... Alignment magnet, Φ1. Φ2...Magnetic field on the central axis. Patent applicant Matsushita Electric Industrial Co., Ltd. Page 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

【特許請求の範囲】[Claims] 偶数極を有する2枚のリング状アライメントマグネット
よりなり熱陰極線管電子銃の外周上に装着される偏向ヨ
ーク装置において、2枚のアライメントマグネットの中
心軸上の磁界は、これら2枚のアライメントマグネット
間の2等分平面上にそのピーク位置があり、かつピーク
磁界の強さが等しいと共に該磁界の分布を上記2等分平
面に対してほぼ対称になるようにしたことを特徴とする
偏向ヨーク装置。
In a deflection yoke device that is made up of two ring-shaped alignment magnets with an even number of poles and is mounted on the outer periphery of a hot cathode ray tube electron gun, the magnetic field on the central axis of the two alignment magnets is generated between these two alignment magnets. A deflection yoke device characterized in that its peak position is on the bisecting plane, the strength of the peak magnetic field is equal, and the distribution of the magnetic field is made to be approximately symmetrical with respect to the bisecting plane. .
JP11758686A 1986-05-23 1986-05-23 Deflection yoke device Pending JPS62274534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11758686A JPS62274534A (en) 1986-05-23 1986-05-23 Deflection yoke device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11758686A JPS62274534A (en) 1986-05-23 1986-05-23 Deflection yoke device

Publications (1)

Publication Number Publication Date
JPS62274534A true JPS62274534A (en) 1987-11-28

Family

ID=14715487

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11758686A Pending JPS62274534A (en) 1986-05-23 1986-05-23 Deflection yoke device

Country Status (1)

Country Link
JP (1) JPS62274534A (en)

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