JPS6070646A - Deflecting yoke structure for color picture tube - Google Patents

Abstract

PURPOSE:To obtain a good resolution characteristic by forming a pair of magnetic pieces provided on the electron gun side for controlling deflecting magnetic field distribution of an substantially semi-circular arc-shaped control part and a leakage magnetic field pulling part substantially L-shaped in its cross section both facing to each other located on the both sides of a vertical axis. CONSTITUTION:An insulator 5 for supporting and fixing a toroidal type vertical deflecting coil 4 includes on the electron gun side a cylindrical small diameter part 5a through which a picture tube neck portion is inserted and a box-shaped portion 5c, and is fixed on the neck part 5a. In addition, a circular arc-shaped end part of a saddle former horizontal deflecting coil is housed in the box-shaped portion 5b. By contrast, magnetic pieces 6, 7 provided on the side of an electron gun of a deflecting yoke for controlling magnetic field distribution is composed of semi-circular arc-shaped control parts 6a, 7a facing to each other located on the both sides of a vertical axis Y and of leakage magnetic field pulling portions 6a, 7b both L-shaped in their cross sections extending to the side of the deflecting yoke and projecting to the large diameter part 5c side. In such a way, it is possible to form a beam spot approximately a true circle over the whole area of a fluorescent screen without losing a self convergence effect, enabling a good resolution to be obtained with little raster distortion.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、サドル型水平偏向コイルおよびトロイダル型
垂直偏向コイルを備えた偏向ヨークと、これに伺設され
た偏向磁界分布制御用の１対の磁性体片とからなるカラ
ー受像管用偏向ヨーク構体に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a deflection yoke equipped with a saddle-type horizontal deflection coil and a toroidal-type vertical deflection coil, and a pair of magnetic yoke installed on the deflection yoke for controlling the deflection magnetic field distribution. The present invention relates to a deflection yoke structure for a color picture tube consisting of a body piece.

従来例の構成とその問題点 一般に、３つの電子ビーム放射口を水平−直線上に配列
してなるインライン型カラー受像管に装着される偏向ヨ
ークは、サドル型水平偏向コイルおよびトロイダル型垂
直偏向コイルを備える。そシテ、コンバーセンス回路不
要のいわゆるセルフコンバーゼンス構成となすために、
水平偏向コイルによって第１図に示すようなビンクッシ
ョン状分布の偏向磁界を生成させ、垂直偏向コイルによ
って第２図に示すようなバレル状分布の偏向磁界を生成
させている。Conventional configuration and its problems In general, the deflection yoke attached to an in-line color picture tube, which has three electron beam emission ports arranged horizontally and linearly, has a saddle-type horizontal deflection coil and a toroidal-type vertical deflection coil. Equipped with Therefore, in order to create a so-called self-convergence configuration that does not require a convergence circuit,
The horizontal deflection coil generates a deflection magnetic field with a bottle cushion-like distribution as shown in FIG. 1, and the vertical deflection coil generates a deflection magnetic field with a barrel-like distribution as shown in FIG.

前記垂直偏向磁界は、第３図に示すように管軸方向の各
点でバレル状傾向を示すが、第４図に示すように全体と
しての垂直偏向磁界分布をバレル傾向に保ちながら、蛍
光体スクリーン面側でわずかにビンクッション傾向とな
し、もってラスタ歪みの補正を行なわしめることもあり
、この場合、前記ビンクッション傾向の歪みを得るのに
偏向コイルを傾斜させたり、あるいは偏向ヨークの蛍光
体スクリーン面側に磁性体片を付設したりしている。The vertical deflection magnetic field exhibits a barrel-like tendency at each point in the tube axis direction as shown in FIG. 3, but as shown in FIG. In some cases, a slight bin cushion tendency is created on the screen side, thereby correcting raster distortion. In this case, the deflection coil is tilted to obtain the bin cushion tendency distortion, or the phosphor of the deflection yoke is A piece of magnetic material is attached to the screen side.

一方、水平偏向磁界の電子銃側におけるビンクッション
状歪みおよび垂直偏向磁界の電子銃側におけるバレル状
歪みにより、第６図に示すように蛍光体スクリーン面１
上のとくに上下および左右に生じるビームスポット（輝
点）ｂ、ｇ、ｒが楕円状に歪み、解像度に低下をきだす
という問題点があった。また、垂直偏向磁界の電子銃側
かバレル状に強く歪むと、垂直偏向感度に低下をきたす
。On the other hand, due to the bottle cushion distortion of the horizontal deflection magnetic field on the electron gun side and the barrel distortion of the vertical deflection magnetic field on the electron gun side, the phosphor screen surface 1
There is a problem in that the beam spots (bright spots) b, g, and r that occur above, in particular, on the top and bottom, left and right sides are distorted into elliptical shapes, resulting in a decrease in resolution. Furthermore, if the electron gun side of the vertical deflection magnetic field is strongly distorted in a barrel shape, the vertical deflection sensitivity will be reduced.

さらに、垂直偏向磁界分布を調整するために付設した前
記磁性体片が、垂直偏向周波数と共振して振動し、異常
音を発することがある。Furthermore, the magnetic piece attached to adjust the vertical deflection magnetic field distribution may resonate with the vertical deflection frequency and vibrate, producing abnormal noise.

なお、ビンクッション状分布の水平偏向磁界は、第６図
の（ａ）に示すように斉一磁界成分２＆と正の６極磁界
成分３ａとの和で、バレル状分布の垂直偏向磁界は、第
６図の（ｂ）に示すように斉一磁界成分２ｂと負の６極
磁界成分３ｂとの和であると考えることができる。そし
て第７図（ｔｔ）、　（ｂ）に示すようにビームスボッ
）ｋ）＋ｇ＋ｒの形状が正、負６極磁界成分ｓａ、３ｂ
により歪み、これによって色ずれのような現象を生じ、
解像度に低下をきたす。As shown in FIG. 6(a), the horizontal deflection magnetic field with the bottle cushion-like distribution is the sum of the uniform magnetic field component 2& and the positive sextupole magnetic field component 3a, and the vertical deflection magnetic field with the barrel-like distribution is the sum of the uniform magnetic field component 2& and the positive sextupole magnetic field component 3a. As shown in FIG. 6(b), it can be considered to be the sum of the uniform magnetic field component 2b and the negative sextupole magnetic field component 3b. As shown in Fig. 7 (tt) and (b), the shape of the beam sub-k) + g + r is positive and negative hexapolar magnetic field components sa, 3b.
This causes distortion, which causes phenomena such as color shift,
This causes a decrease in resolution.

発明の目的 しだがって本発明の目的とするところは、セルフコンバ
ーゼンス効果を損なうことなく蛍光体スクリーン面の全
域で真円に近いビームスポットが得られ、しかも垂直偏
向感度を向上させ得るカラー受像管用偏向ヨーク構体を
提供することにある。OBJECTS OF THE INVENTION Accordingly, an object of the present invention is to provide a color image receiving system that can obtain a beam spot that is close to a perfect circle over the entire area of the phosphor screen surface without impairing the self-convergence effect, and that can improve vertical deflection sensitivity. An object of the present invention is to provide a deflection yoke structure for a pipe.

発明の構成 本発明においては、偏向磁界のとくに電子銃側磁界分布
がビームスポット形状に大きく影響することに鑑み、偏
向ヨークの電子銃側端部に偏向磁界分布制御用の１対の
磁性体片を付設する。この磁性体片は、垂直軸をはさん
で相対向するように偏向ヨーク絶縁枠体の筒状径小部に
沿って配設されだ略半円弧状の制御部と、腰部より側方
へ張り出しかつ前記絶縁枠体の径大部側へ突出した断回
路り字状の漏れ磁界引き込み部とからなり、水平偏向磁
界の電子銃側をバレル傾向に歪ませ、ここに負の６極磁
界成分を生じさせる。まだ、垂直偏向磁界の電子銃側を
ビンクッション傾向に歪まぜ、ここに正の６極磁界成分
を生じさせるのであり、これを以下図面に示した実施例
とともに詳しく説明する。Structure of the Invention In the present invention, in view of the fact that the deflection magnetic field, especially the electron gun side magnetic field distribution, greatly influences the beam spot shape, a pair of magnetic pieces for controlling the deflection magnetic field distribution is provided at the electron gun side end of the deflection yoke. Attached. This magnetic material piece is arranged along the small diameter cylindrical part of the deflection yoke insulating frame so as to face each other across the vertical axis, and has a roughly semicircular arc-shaped control part and a control part that extends laterally from the waist part. It also includes a leakage magnetic field drawing part in the shape of a disconnection cursor that protrudes toward the large diameter side of the insulating frame, distorts the electron gun side of the horizontal deflection magnetic field in a barrel direction, and directs the negative hexapole magnetic field component here. bring about Still, the electron gun side of the vertical deflection magnetic field is distorted to have a bottle cushion tendency, and a positive hexapole magnetic field component is generated here.This will be explained in detail below together with the embodiment shown in the drawings.

実施例の説明 第８図および第９図において、バレル状偏向磁界生成用
のトロイダル型垂直偏向コイル４を支持固定する合成樹
脂製漏斗状の絶縁枠体６は、受像管ネック部が挿通され
る筒状径小部５ａおよび箱状部６ｂを電子銃側に有し、
筒状径小部５ａにおいて受像管ネック部に締めつけ固定
される。まだ、箱状部５ｂにはビンクッション状偏向磁
界生成用のサドル型水平偏向コイル（図示せず）の円弧
状端部が納められる。６Ｃは絶縁枠体５の径大部を示す
。DESCRIPTION OF EMBODIMENTS In FIGS. 8 and 9, a funnel-shaped insulating frame 6 made of synthetic resin that supports and fixes a toroidal vertical deflection coil 4 for generating a barrel-shaped deflection magnetic field has a picture tube neck inserted therethrough. It has a cylindrical small-diameter portion 5a and a box-shaped portion 6b on the electron gun side,
The small diameter cylindrical portion 5a is tightened and fixed to the neck portion of the picture tube. The arc-shaped end portion of a saddle-type horizontal deflection coil (not shown) for generating a bottle cushion-shaped deflection magnetic field is still housed in the box-shaped portion 5b. 6C indicates a large diameter portion of the insulating frame 5.

一方、かかる偏向ヨークの電子銃側に付設された磁界分
布制御用の１対の磁性体片６，７は、第１０図に示すよ
うに垂直軸Ｙをはさんで０状に相対向する半円弧状の制
御部６ａ、７ａと、腰部から側方へ張り出しかつ径大部
６Ｃ側へ突出した断面り字状の漏れ磁界引き込み部６ｂ
、７ｂとからなり、制御部５Ｊ　７ａは絶縁枠体５の筒
状径小部６ｉＬの外周面に沿うように配設固定される。On the other hand, a pair of magnetic pieces 6 and 7 for magnetic field distribution control attached to the electron gun side of the deflection yoke are halves facing each other in a 0-shape across the vertical axis Y, as shown in FIG. Arc-shaped control parts 6a and 7a, and a leakage magnetic field drawing part 6b with an L-shaped cross section projecting laterally from the waist and protruding toward the large diameter part 6C.
, 7b, and the control part 5J 7a is arranged and fixed along the outer peripheral surface of the cylindrical small diameter part 6iL of the insulating frame 5.

また、漏れ磁界引き込み部６ｂ、７ｂの側方へ張り出し
だ面６０．７０は、垂直軸Ｙおよび水平軸Ｘを含む面に
平行な面内に位置し、突出面６ｄ、７ｄは、垂直軸Ｙお
よび管軸２を含む面に平行な面内に位置している。そし
て、面６ｃ、了Ｃおよび面５ｄ、７ｄは、箱状部６ｂの
背面および側面にそれぞれ接して固定されている。さら
に、１対の磁性体片６，７の絶縁枠体６に対する位置決
めは、絶縁枠体６の筒状径小部５ａに設けられた小突起
６ｄと、制御部６ａ、７１Ｌに設けられた小孔６ｅ。Further, the laterally protruding surfaces 60.70 of the leakage magnetic field drawing parts 6b, 7b are located in a plane parallel to a plane including the vertical axis Y and the horizontal axis and is located in a plane parallel to the plane containing the tube axis 2. The surfaces 6c, 5d and 7d are fixed in contact with the back and side surfaces of the box-shaped portion 6b, respectively. Furthermore, positioning of the pair of magnetic pieces 6 and 7 with respect to the insulating frame 6 is achieved by using small protrusions 6d provided on the cylindrical small diameter portion 5a of the insulating frame 6 and small protrusions provided on the control portions 6a and 71L. Hole 6e.

７ｅとの嵌合により得ている。It is obtained by fitting with 7e.

このように構成された偏向ヨーク構体では、ヨークのコ
アーから漏れだ垂直偏向磁界磁束が、１対の磁性体片６
，７の漏れ磁界引き込み部６　ｂ　＋７ｂによって電子
銃側の制御部５１Ｌ、７ａに引き込まれ、ここに第１１
図に実線矢印で示すようなビンクッション状の垂直偏向
磁界、つまり正の６極磁異成分が生成される。まだ、ビ
ンクッション状水平偏向磁界の電子銃側磁界分布は、１
対の磁性体片６．７による漏れ磁束引っ込み作用により
、第１２図に実線矢印で示すようにバレル傾向を帯び・
ここに負の６極磁界成分が生成される。In the deflection yoke structure configured in this way, the vertical deflection magnetic flux leaking from the core of the yoke is transmitted to the pair of magnetic pieces 6.
, 7, the leakage magnetic field is drawn into the electron gun side control parts 51L, 7a by the leakage magnetic field drawing parts 6b+7b of the 11th
A bottle-cushion-shaped vertical deflection magnetic field as shown by the solid arrow in the figure, that is, a positive six-pole magnetic disparity component is generated. Still, the electron gun side magnetic field distribution of the bottle cushion horizontal deflection magnetic field is 1
Due to the leakage magnetic flux retraction effect by the pair of magnetic pieces 6.7, it takes on a barrel tendency as shown by the solid line arrow in FIG.
A negative six-pole magnetic field component is generated here.

水平偏向磁界および垂直偏向磁界の各電子銃側領域は、
コンバーゼンス特性および画像歪みに対してほとんど影
響せず、また、わずかな影響は偏向コイルの巻線分布を
調整することにより補正が可能である。しだがって、セ
ルフコンバーゼンス効果を損うことなく蛍光体スクリー
ン面の上下および左右に生じるビームスポットを含むす
べてのビームスポットの形状を第１３図に示すように真
円に近いものとなすと吉ができ、解像度が向上する。ま
だ、電子ビームの偏向に寄与してぃなかった垂直偏向漏
れ磁界が電子ビームの偏向に寄与するようになるので、
それだけ垂直偏向感度が向上する。The electron gun side regions of the horizontal deflection magnetic field and the vertical deflection magnetic field are
It has almost no effect on convergence characteristics or image distortion, and the slight effect can be corrected by adjusting the winding distribution of the deflection coil. Therefore, it is advisable to make the shapes of all beam spots, including those generated on the top, bottom, left and right sides of the phosphor screen, into a shape close to a perfect circle as shown in Figure 13 without impairing the self-convergence effect. , and the resolution is improved. The vertical deflection leakage magnetic field, which had not yet contributed to the deflection of the electron beam, now contributes to the deflection of the electron beam.
The vertical deflection sensitivity improves accordingly.

ビームスポット形状の補正の程度は、１対の磁性体片６
，７の制御部ｅａ、７３の長さＬａ、開さＬｂ等によっ
て決まり、ビームスポットの偏向７Ｂ−の端部が電子銃
のメインレンズ主成部付近に選択できるが、もっとも好
ましい範囲は３００〜４０である。長さＬｂを大きくす
ればするほど垂直偏向磁界のビンクッション歪みが強く
なるが、過大になると電子ビームのランディング特性や
ラスタ歪みに悪影響をおよぼす。漏れ磁界引き込み部６
ｂ、７ｂの蛍光体スクリーン面側端部が管軸上磁界分布
のピーク値伺近に達する位置が、長さＬｂの限度である
。The degree of correction of the beam spot shape is determined by a pair of magnetic pieces 6.
, 7, the length La of 73, the aperture Lb, etc., and the end of the beam spot deflection 7B- can be selected near the main component of the main lens of the electron gun, but the most preferable range is 300~ It is 40. The larger the length Lb, the stronger the bin cushion distortion of the vertical deflection magnetic field, but if it becomes too large, it will adversely affect the landing characteristics and raster distortion of the electron beam. Leakage magnetic field drawing part 6
The limit of the length Lb is the position where the end portions b and 7b on the side of the phosphor screen surface reach near the peak value of the magnetic field distribution on the tube axis.

絶縁枠体６をその筒状径小部６乙の外周面に設けた図外
の非磁性バンドでカラー受像管ネック部に締めつけ固定
するさい、１対の磁性体片６，７の制御部６ａ、７ａを
前記バンドの下に抱き込ませて締めつけると、磁性体片
６，７の共振による異常音発生を抑制することができる
。ただし、磁性体片６，７の制御部６ａ、７ａを前記バ
ンドの外周面に沿わせて固定してもよい。まだ、制御部
６１Ｌ、７１Ｌは〔〕状のものであってもよく、略半円
弧状であればよい。さらに、漏れ磁界引き込み部６ｂ、
７ｂは略り字状の断面形状を有しておればよく、それぞ
れの張り出し面６０．７Ｇに１個または複数個の孔を設
け、この孔の周縁部に絶縁枠体６の箱状部５ｂをフック
等で係合させてもよい。When tightening and fixing the insulating frame 6 to the neck of the color picture tube with a non-magnetic band (not shown) provided on the outer peripheral surface of the cylindrical small-diameter portion 6B, the control portion 6a of the pair of magnetic pieces 6 and 7 is used. , 7a under the band and tightened, it is possible to suppress generation of abnormal noise due to resonance of the magnetic pieces 6, 7. However, the control parts 6a and 7a of the magnetic pieces 6 and 7 may be fixed along the outer peripheral surface of the band. However, the control portions 61L and 71L may be shaped like [], as long as they have a substantially semicircular arc shape. Furthermore, a leakage magnetic field drawing part 6b,
7b should just have an abbreviated cross-sectional shape, one or more holes are provided in each projecting surface 60.7G, and the box-shaped portion 5b of the insulating frame 6 is provided at the periphery of the hole. may be engaged with a hook or the like.

発明の効果 本発明のカラー受像管用偏向ヨーク構体は前述のように
構成されるので、セルフコンバーゼンス効果を損うこと
なく蛍光体スクリーン面の全域で真円に近いビームスポ
ットを生成でき、ラスタ歪みも少なく良好な解像度特性
を得るこ吉ができる。Effects of the Invention Since the deflection yoke structure for a color picture tube of the present invention is constructed as described above, it is possible to generate a nearly perfect circular beam spot over the entire area of the phosphor screen without impairing the self-convergence effect, and it also eliminates raster distortion. It is possible to obtain good resolution characteristics with a small amount.

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

図はバレル状の磁界分布図、第３図および第４図はセル
フコンバーゼンス方式における垂直偏向磁界分布を、管
軸を横軸にとって示す図、第５図は蛍光体スクリーン面
上に生成されるビームスポットの形状歪みを模式的に示
す図、第６図（ａ）、　（ｂ）はビンクッション状磁界
およびバレル状磁界の各成分を示す図、第７図（＆）、
　（１））は正・負６極磁界成分とビームスポットの形
状歪みとの関係を示す図、第８図は本発明を実施しだ偏
向ヨーク構体の斜視図、第９図は同偏向ヨーク構体を電
子銃側からみた図、第１０図は同偏向ヨーク構体に用い
られる１対の磁性体片の斜視図、第１１図および第１２
図は同偏向ヨーク構体の動作原理を説明するだめの図、
第１３図は本発明の実施により得られるビームスポット
の形状を模式的に示す図である。 ６・・・・・・絶縁枠体、６，７・・・・・・磁性体片
。 代理人の氏名　弁理士　中　尾　敏　男　ほか１名６山 第１０図 第１１図　血 第１３図 手続補正書 昭和６８年１２月　２日 昭和５８年特許願第１７７３６６号 ２発明の名称 カラー受像管用偏向ヨーク構体 ３補正をする者 事件との関係　特　許　出　願　人 任　所　大阪府門真市太字門真１００６番地名　称　（
５８４）松下電子工業株式会社代表者　三　山　清　− ４代理人　〒５７１ 住　所　大阪府門真市大字門真１００６番地松下電器産
業株式会社内 ６補正の対象 ８日、！Ｉｔθ）ｚ寮日日ａ）ま看烈］プシ言φ日日σ
）冊「垂直偏向コイル」に補正し捷す。 （２）同書第８頁第９行の「２ａＯ〜９０°」２１６゜
〜９０°」に補正します。 （３）同書第８頁第１０〜１１行の「３０°〜４００」
を「１００〜４００」に補正します。The figure is a barrel-shaped magnetic field distribution diagram, Figures 3 and 4 are diagrams showing the vertical deflection magnetic field distribution in the self-convergence method, with the tube axis as the horizontal axis, and Figure 5 is a beam generated on the phosphor screen surface. Figures 6 (a) and 6 (b) schematically showing the shape distortion of the spot are diagrams showing each component of the bottle cushion-shaped magnetic field and the barrel-shaped magnetic field, and Figure 7 (&).
(1)) is a diagram showing the relationship between positive and negative six-pole magnetic field components and shape distortion of the beam spot, FIG. 8 is a perspective view of a deflection yoke structure in which the present invention is implemented, and FIG. 9 is a diagram showing the same deflection yoke structure. seen from the electron gun side, FIG. 10 is a perspective view of a pair of magnetic pieces used in the deflection yoke structure, and FIGS. 11 and 12 are
The figure is a diagram to explain the operating principle of the deflection yoke structure.
FIG. 13 is a diagram schematically showing the shape of a beam spot obtained by implementing the present invention. 6... Insulating frame, 6, 7... Magnetic material piece. Name of agent Patent attorney Toshio Nakao and 1 other person 6th figure Figure 10 Figure 11 Blood figure 13 Procedural amendment December 2, 1988 Patent application No. 177366 1988 2 Name of invention For color picture tubes Relationship with the case of the person amending the deflection yoke structure 3 Patent application Person name 1006 Bold Kadoma, Kadoma City, Osaka Prefecture Name (
584) Matsushita Electric Industrial Co., Ltd. Representative Kiyoshi Miyama - 4 agents 571 Address 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 8 days subject to 6 amendments! It θ)
) Correct and remove the book ``Vertical Deflection Coil''. (2) Correct to “2aO~90°” 216°~90°” on page 8, line 9 of the same book. (3) “30° to 400” on page 8, lines 10 to 11 of the same book
Correct it to "100-400".

Claims (1)

【特許請求の範囲】[Claims] 漏斗状の絶縁枠体にとりつけられたサドル型水平偏向コ
イルおよびトロイダル型垂直偏向コイルの電子銃側に付
設された偏向磁界分布制御用の１対の磁性体片が、垂直
軸をはさんで相対向するように前記絶縁枠体の筒状径小
部に沿って配設されだ略半円弧状の制御部と、核部より
側方へ張り出しかつ前記絶縁枠体の径大部側へ突出した
断回路り字状の漏れ磁界引き込み部とからなることを特
徴とするカラー受像管用偏向ヨーク構体。A pair of magnetic pieces for controlling the deflection magnetic field distribution attached to the electron gun side of the saddle-type horizontal deflection coil and toroidal-type vertical deflection coil attached to a funnel-shaped insulating frame are positioned relative to each other across the vertical axis. a substantially semicircular arc-shaped control portion disposed along the small diameter cylindrical portion of the insulating frame so as to face the insulating frame; and a control portion extending laterally from the core and toward the large diameter portion of the insulating frame. A deflection yoke structure for a color picture tube characterized by comprising a leakage magnetic field drawing part in the shape of a broken circuit.