JPH08115686A - Deflection yoke - Google Patents
Deflection yokeInfo
- Publication number
- JPH08115686A JPH08115686A JP24967094A JP24967094A JPH08115686A JP H08115686 A JPH08115686 A JP H08115686A JP 24967094 A JP24967094 A JP 24967094A JP 24967094 A JP24967094 A JP 24967094A JP H08115686 A JPH08115686 A JP H08115686A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- coil
- horizontal
- deflection
- magnetic
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はテレビジョン受像機等に
用いられインライン型陰極線管（ＣＲＴ）用の偏向ヨー
クのミスコンバーゼンスの低減に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to reducing misconvergence of a deflection yoke for an in-line cathode ray tube (CRT) used in a television receiver or the like.
【０００２】[0002]
【従来の技術】以下、従来の偏向ヨークについて図を参
照しながら説明する。図８は水平偏向コイルの外観斜視
図である。図８において、水平偏向コイル１は鞍型輪郭
形状の上側コイル２と下側コイル３で構成され、水平管
軸Ｘ−Ｘの位置で対向して配設している。４は開口部側
のベンドアップ部、５はネック側のベンドアップ部、６
は長手巻線部である。偏向ヨークは水平偏向コイル１の
外側に絶縁枠（図示していない）を配し、前記絶縁枠の
外側にあって、水平偏向コイル１の長手巻線部６に対応
するところに、垂直偏向コイル（図示していない）を配
設して、それらが内部から順番に積み重なった配置で構
成されている。2. Description of the Related Art A conventional deflection yoke will be described below with reference to the drawings. FIG. 8 is an external perspective view of the horizontal deflection coil. In FIG. 8, the horizontal deflection coil 1 is composed of an upper coil 2 and a lower coil 3 each having a saddle-shaped profile, and they are arranged so as to face each other at a horizontal tube axis XX. 4 is a bend-up portion on the opening side, 5 is a bend-up portion on the neck side, 6
Is a longitudinal winding part. The deflection yoke has an insulating frame (not shown) arranged on the outer side of the horizontal deflection coil 1, and the vertical deflection coil is provided on the outer side of the insulating frame and corresponding to the longitudinal winding portion 6 of the horizontal deflection coil 1. (Not shown) are arranged so that they are sequentially stacked from the inside.
【０００３】以上のように構成され偏向ヨークについ
て、その動作について説明する。図９（ａ）は従来の実
際の偏向ヨークによる上下非対称な水平磁界図である。
図９（ｂ）は従来の実際の偏向ヨークによる上下非対称
な水平磁界による赤と青ビームの軌跡を示すＣＲＴ画面
図である。The operation of the deflection yoke constructed as above will be described. FIG. 9A is a horizontal magnetic field diagram which is vertically asymmetrical by a conventional actual deflection yoke.
FIG. 9B is a CRT screen diagram showing the loci of the red and blue beams due to the vertical asymmetric horizontal magnetic field produced by the conventional actual deflection yoke.
【０００４】図９（ａ）において、水平偏向コイル１に
電流が流れると、水平磁界７が誘起され、これにより、
赤、青と緑ビーム（Ｒ，ＢとＧ）を水平方向に偏向して
いる。緑ビーム（Ｇ）はセンタービームであるが、便宜
上図示していない。In FIG. 9 (a), when a current flows through the horizontal deflection coil 1, a horizontal magnetic field 7 is induced, which causes
The red, blue and green beams (R, B and G) are horizontally deflected. The green beam (G) is a center beam, but is not shown for convenience.
【０００５】理想的な偏向ヨークでは、水平磁界７は上
下対称な形となるが、実際の偏向ヨークでは、上側コイ
ル２と下側コイル３は線経の不均一、巻線時のテンショ
ンのバラツキ、巻枠の金型形状の僅かな差異等に起因す
る巻線形状の相違と、また組み立て時においても、ＣＲ
Ｔの水平管軸に対して正確に対称に配置されずに上下方
向にずれたり、多少回転されて組み合わされる。それに
よって上側のコイル２と下側のコイル３に誘起される磁
界分布はＣＲＴの水平管軸に対して上下非対称になる。
例えば、上側コイル２と下側コイル３が水平管軸に対し
て対称に配置されずに少し上側に配置される場合が生じ
る。その場合は、上側磁界が見かけ上強められ図９
（ａ）に示す上下非対称な水平磁界７となる。In an ideal deflection yoke, the horizontal magnetic field 7 has a vertically symmetrical shape, but in an actual deflection yoke, the upper coil 2 and the lower coil 3 have non-uniform line lengths and variations in tension during winding. , The difference in the winding shape due to a slight difference in the die shape of the winding frame, and the CR
They are not arranged symmetrically with respect to the horizontal tube axis of T, but are displaced in the vertical direction or are rotated slightly to be combined. Thereby, the magnetic field distribution induced in the upper coil 2 and the lower coil 3 becomes vertically asymmetric with respect to the horizontal tube axis of the CRT.
For example, the upper coil 2 and the lower coil 3 may not be arranged symmetrically with respect to the horizontal tube axis but may be arranged slightly above. In that case, the upper magnetic field is apparently strengthened, and FIG.
The vertical asymmetric horizontal magnetic field 7 shown in FIG.
【０００６】次に、図９（ａ）の上下非対称な水平磁界
７において、赤ビームＲと青ビームＢが水平管軸上をど
のように偏向されてＣＲＴ画面に映し出されるかを説明
する。赤ビームＲと青ビームＢが画面右側に偏向される
時、それぞれのビームは水平磁界７と直角な方向に力を
受ける。赤ビームＲは偏向の初期にＣＲＴネック側の長
手部巻線６で強い上側の力を受け、ファネルカーブに沿
って右側へ偏向されていく時も常に上側の力を受ける。
一方、青ビームＢは偏向の初期にＣＲＴネック側の長手
巻線部６で強い下側の力を受け、ＣＲＴの垂直軸を過ぎ
て、ファネルカーブに沿って右側へ偏向されていく時は
多少弱い上側の力を受ける。従って、画面右端において
は、赤ビームＲは上に、青ビームＢは下に映し出され
る。Next, how the red beam R and the blue beam B are deflected on the horizontal tube axis and projected on the CRT screen in the vertical asymmetric horizontal magnetic field 7 of FIG. 9A will be described. When the red beam R and the blue beam B are deflected to the right side of the screen, each beam receives a force in a direction perpendicular to the horizontal magnetic field 7. The red beam R receives a strong upper force in the longitudinal winding 6 on the CRT neck side in the initial stage of deflection, and always receives the upper force even when it is deflected to the right along the funnel curve.
On the other hand, when the blue beam B receives a strong lower force at the longitudinal winding portion 6 on the CRT neck side at the initial stage of deflection and passes the vertical axis of the CRT and is deflected to the right along the funnel curve, it is somewhat It receives a weak upper force. Therefore, at the right end of the screen, the red beam R is projected upward and the blue beam B is projected downward.
【０００７】また、赤ビームＲと青ビームＢが画面左側
に偏向される時、青ビームＢは偏向の初期にＣＲＴネッ
ク側の長手巻線部６で強い上側の力を受け、ファネルカ
ーブに沿って左側へ偏向されていく時も常に上側の力を
受ける。一方、赤ビームＲは偏向の初期にＣＲＴネック
側の長手巻線部６で強い下側の力を受け、ＣＲＴの垂直
軸を過ぎて、ファネルカーブに沿って左側へ偏向されて
いく時は多少弱い上側の力を受ける。従って、画面左端
においては、青ビームＢは上に、赤ビームＲは下に映し
出される。この様子を示したのが図９（ｂ）であり、こ
の赤ビームＲと青ビームＢとの位置ずれをミスコンバー
ゼンスと呼んでいる。図９（ｂ）に示すように赤ビーム
Ｒと青ビームＢは管軸を中心としてクロスしており端面
に行くほどミスコンバーゼンスが大きくなり、赤ビーム
Ｒと青ビームＢの色ずれが大きくなって画面に映し出さ
れる。この上下非対称な水平磁界７によるミスコンバー
ゼンスを改善するためには、何らかの手段によって、見
かけ上、上下対称な水平磁界７になるように補正する必
要があり、その手段の一つが差動コイル装置を用いるも
のである。Further, when the red beam R and the blue beam B are deflected to the left side of the screen, the blue beam B receives a strong upward force at the longitudinal winding portion 6 on the CRT neck side at the initial stage of the deflection and follows the funnel curve. Even when it is deflected to the left, it always receives the upper force. On the other hand, when the red beam R receives a strong downward force at the longitudinal winding portion 6 on the CRT neck side at the initial stage of deflection and passes through the vertical axis of the CRT and is deflected to the left along the funnel curve, it is somewhat It receives a weak upper force. Therefore, at the left end of the screen, the blue beam B is projected upward and the red beam R is projected downward. This state is shown in FIG. 9B, and the positional deviation between the red beam R and the blue beam B is called misconvergence. As shown in FIG. 9B, the red beam R and the blue beam B intersect with each other about the tube axis, and the misconvergence increases toward the end face, and the color shift between the red beam R and the blue beam B increases. It is displayed on the screen. In order to improve the misconvergence due to the vertically asymmetric horizontal magnetic field 7, it is necessary to correct the apparent horizontal symmetric horizontal magnetic field 7 by some means, and one of the means is a differential coil device. It is used.
【０００８】図１０（ａ）は差動コイル装置の断面図を
示している。図１０（ａ）において、８は第１のコイ
ル、９は第２のコイル、１０はコア、１１はコイルボビ
ンであり、第１のコイル８と第２のコイル９は同一のコ
イルボビン１１に巻回され、コイルボビン１１の中空部
に挿入されているコア１０は矢印方向に移動可能な構成
になっている。前記構成において、コア１０を移動する
ことにより第１のコイル８と第２のコイル９のインダク
タンスのいずれか一方を高くし、他方を低くすることが
可能である。すなわち、コア１０を右側に動かすと、第
２のコイル９とは近くなり、第２のコイル９のインダク
タンスが高くなるが、第１のコイル８とはかえって遠ざ
かることにより第１のコイル８のインダクタンスは低く
なる。図１０（ｂ）は差動コイル装置を水平偏向コイル
に接続した配線図である。図１０（ｂ）において、差動
コイル装置の第１のコイル８は水平偏向コイル１の上側
コイル２と直列に接続され、第２のコイル９は水平偏向
コイル１の下側コイル３と直列に接続され、前記直列接
続されたものをさらに並列接続して、両端１２と１３に
偏向電源より偏向電流（ｉ2＋ｉ3）を供給している。FIG. 10A shows a sectional view of the differential coil device. In FIG. 10A, 8 is a first coil, 9 is a second coil, 10 is a core, 11 is a coil bobbin, and the first coil 8 and the second coil 9 are wound around the same coil bobbin 11. The core 10 inserted into the hollow portion of the coil bobbin 11 is movable in the arrow direction. In the above configuration, by moving the core 10, it is possible to increase one of the inductances of the first coil 8 and the second coil 9 and decrease the other. That is, when the core 10 is moved to the right, it becomes closer to the second coil 9 and the inductance of the second coil 9 becomes higher, but when the core 10 is moved away from the first coil 8, the inductance of the first coil 8 becomes larger. Will be lower. FIG. 10B is a wiring diagram in which the differential coil device is connected to the horizontal deflection coil. In FIG. 10B, the first coil 8 of the differential coil device is connected in series with the upper coil 2 of the horizontal deflection coil 1, and the second coil 9 is connected in series with the lower coil 3 of the horizontal deflection coil 1. The connected and serially connected elements are further connected in parallel, and a deflection current (i 2 + i 3 ) is supplied to both ends 12 and 13 from a deflection power source.
【０００９】次に、図９（ａ）の上下非対称な水平磁界
図を差動コイル装置にて上下対称な水平磁界に補正する
手段について、図１０（ｂ）を用いながら説明する。Next, a means for correcting the vertically asymmetric horizontal magnetic field diagram of FIG. 9A into a vertically symmetrical horizontal magnetic field by the differential coil device will be described with reference to FIG. 10B.
【００１０】例えば、上側コイル２と下側コイル３が水
平管軸に対して対称に配置されずに少し上側に配置され
る場合は、上側磁界が見かけ上強められているので、上
側コイル２に流れる偏向電流ｉ2を下側コイル３に流れ
る偏向電流ｉ3より小さくすれば良い。偏向電流ｉ2は上
側コイル２と第１のコイル８の合成インダクタンスに反
比例して流れ、また、偏向電流ｉ3は下側コイル３と第
２のコイル９の合成インダクタンスに反比例して流れる
ので、コア１０を左側に動かし第１のコイル８と近くし
て第１のコイル８のインダクタンスを高くすることによ
り、上側コイル２と第１のコイル８の合成インダクタン
スを高くし、上側コイル２に流れる偏向電流ｉ2を下側
コイル３に流れる偏向電流ｉ3より小さくすることがで
きる。For example, when the upper coil 2 and the lower coil 3 are not symmetrically arranged with respect to the horizontal tube axis but are arranged slightly above, the upper magnetic field is apparently intensified, so that The deflection current i 2 that flows may be smaller than the deflection current i 3 that flows in the lower coil 3. Since the deflection current i 2 flows inversely proportional to the combined inductance of the upper coil 2 and the first coil 8, and the deflection current i 3 flows inversely proportional to the combined inductance of the lower coil 3 and the second coil 9, By moving the core 10 to the left side and bringing it closer to the first coil 8 to increase the inductance of the first coil 8, the combined inductance of the upper coil 2 and the first coil 8 is increased, and the deflection flowing in the upper coil 2 is increased. The current i 2 can be made smaller than the deflection current i 3 flowing through the lower coil 3.
【００１１】このようにして、差動コイル装置のコア１
０の位置調整により、上側コイル２に流れる偏向電流ｉ
2と下側コイル３に流れる偏向電流ｉ3を調整して、前記
上下非対称な水平磁界７を見かけ上、対称な水平磁界７
に補正できる。従って、赤ビームＲと青ビームＢは水平
管軸方向の左右に偏向される時、上下の力を受けること
がなく、赤ビームＲと青ビームＢの軌跡は一致し、前記
ミスコンバーゼンスが生じることなく画面に映し出され
る。In this way, the core 1 of the differential coil device is
By adjusting the position of 0, the deflection current i flowing in the upper coil 2
2 and the deflection current i 3 flowing in the lower coil 3 are adjusted so that the vertically asymmetric horizontal magnetic field 7 is apparently symmetrical.
Can be corrected to. Therefore, when the red beam R and the blue beam B are deflected to the left and right in the horizontal tube axis direction, they do not receive the vertical force, the loci of the red beam R and the blue beam B coincide with each other, and the misconvergence occurs. Instead, it is displayed on the screen.
【００１２】[0012]
【発明が解決しようとする課題】しかしながら、従来の
差動コイル装置によるミスコンバーゼンス補正では第１
のコイル８と第２のコイル９に高周波の偏向電流が流れ
ることにより、差動コイル装置に大きな電力損失が生じ
るとともに、また、第１のコイル８と第２のコイル９が
挿入されることにより、水平偏向コイル１の偏向効率の
低下を生じるという問題点を有していた。However, in the misconvergence correction by the conventional differential coil device, the first method is used.
Since a high-frequency deflection current flows through the coil 8 and the second coil 9 of FIG. 1, a large power loss occurs in the differential coil device, and the first coil 8 and the second coil 9 are inserted. However, there is a problem that the deflection efficiency of the horizontal deflection coil 1 is reduced.
【００１３】また、前記電力損失と偏向効率の低下を解
消するには、差動コイル装置も大型にならざるをえない
ため、コストアップになるという欠点もあった。Further, in order to eliminate the power loss and the decrease in the deflection efficiency, the differential coil device is inevitably large in size, so that there is a drawback that the cost is increased.
【００１４】本発明は、上記従来の問題点に鑑みて成さ
れたものであり、差動コイル装置による電力損失および
偏向効率の低下を生じることなく、前記ミスコンバーゼ
ンスを低減できる偏向ヨークを提供することを目的とす
る。The present invention has been made in view of the above conventional problems, and provides a deflection yoke capable of reducing the misconvergence without causing the power loss and the reduction of the deflection efficiency due to the differential coil device. The purpose is to
【００１５】[0015]
【課題を解決するための手段】この目的を達成するため
に本発明の偏向ヨークは、水平偏向コイルのネック側ベ
ンドアップ部近傍に一対の磁界修正部が設けられた絶縁
枠の前記磁界修正部に、磁性片を挿着し、磁性片を前記
磁界修正部内を円周方向に移動することができる構成を
有している。In order to achieve this object, the deflection yoke of the present invention is the above-mentioned magnetic field correction section of an insulating frame in which a pair of magnetic field correction sections are provided in the vicinity of the neck side bend-up section of the horizontal deflection coil. In addition, the magnetic piece can be inserted and attached, and the magnetic piece can be moved in the circumferential direction in the magnetic field correction section.
【００１６】また、磁性片に円周面を設け、円周面の軸
方向幅を絶縁枠の磁界修正部に設置されたストッパー部
とツメ部との間の長さに対してプラス公差になるように
している。Further, the magnetic piece is provided with a circumferential surface, and the axial width of the circumferential surface has a plus tolerance with respect to the length between the stopper portion and the claw portion provided in the magnetic field correcting portion of the insulating frame. I am trying.
【００１７】[0017]
【作用】絶縁枠の磁界修正部に挿着された磁性片を円周
方向に移動することによって、水平偏向コイルによる上
下非対称な水平磁界が生じた場合でも、見かけ上、上下
対称になるように補正を行うことができる。また、磁性
片の軸方向幅を磁界修正部のストッパー部とツメ部との
間の長さに対してプラス公差になるようにしているの
で、任意の位置で固定できる。The magnetic piece inserted into the magnetic field correction portion of the insulating frame is moved in the circumferential direction so that even if a vertical asymmetrical horizontal magnetic field is generated by the horizontal deflection coil, it is apparently vertically symmetrical. Corrections can be made. Further, since the axial width of the magnetic piece has a plus tolerance with respect to the length between the stopper portion and the claw portion of the magnetic field correcting portion, the magnetic piece can be fixed at any position.
【００１８】[0018]
【実施例】図１は本発明の実施例における偏向ヨークの
外観斜視図である。図１において、図８と同符号のもの
は図８記載の従来の偏向ヨークと基本的には変わりがな
いので、説明はそこに譲って省略する。１４は絶縁枠、
１５は一対の環状コア、１６はトロイダル型の垂直偏向
コイル、１７は磁性片である。垂直偏向コイル１６は環
状コア１５にコイルを巻回したものである。磁性片１７
は絶縁枠１４の水平偏向コイル１の長手巻線部６のネッ
ク側に対応するところで、垂直偏向コイル１６のネック
側端面と前記水平偏向コイル１のネック側のベンドアッ
プ部５の間（以下この部分をネック側ベンドアップ部近
傍と呼称する）にあり、水平管軸Ｘ−Ｘ上に設けられた
左右の一対の磁界修正部１８に挿着されている。前記磁
界修正部１８の上下方向の中心は水平管軸Ｘ−Ｘに一致
するように構成されている。図２（ａ）は絶縁枠に設け
られた磁界修正部の拡大斜視図で、図２（ｂ）は磁性片
の拡大斜視図で、図２（ｃ）磁界修正部に磁性片を挿着
する方法を示した図である。1 is a perspective view of a deflection yoke according to an embodiment of the present invention. In FIG. 1, the same reference numerals as those in FIG. 8 are basically the same as those of the conventional deflection yoke shown in FIG. 8, and therefore the description thereof will be omitted here. 14 is an insulating frame,
Reference numeral 15 is a pair of annular cores, 16 is a toroidal vertical deflection coil, and 17 is a magnetic piece. The vertical deflection coil 16 is a coil wound around the annular core 15. Magnetic piece 17
Corresponds to the neck side of the longitudinal winding portion 6 of the horizontal deflection coil 1 of the insulating frame 14, and between the neck side end surface of the vertical deflection coil 16 and the bend side bend portion 5 of the horizontal deflection coil 1 (hereinafter referred to as this The portion is referred to as the vicinity of the bend portion on the neck side) and is attached to the pair of left and right magnetic field correction portions 18 provided on the horizontal tube axis XX. The vertical center of the magnetic field correction unit 18 is configured to coincide with the horizontal tube axis XX. FIG. 2A is an enlarged perspective view of the magnetic field correction portion provided on the insulating frame, FIG. 2B is an enlarged perspective view of the magnetic piece, and FIG. 2C is a magnetic piece inserted into the magnetic field correction portion. It is the figure which showed the method.
【００１９】図１、図２（ａ）、図２（ｂ）および図２
（ｃ）において、磁性片１７は円周面１９と端部中央の
凸部２０で構成され、また、絶縁枠１４の磁界修正部１
８は磁性片１７の形状に合わせたストッパー部２１とそ
れに対向したツメ部２２で構成されている。前記磁界修
正部１８に磁性片の１７の凸部２０を保持し、磁性片１
７の円周面１９を多少傾斜させながら磁界修正部１８の
ストッパー部２１に当てて（点線にて示している）か
ら、管軸方向に押してツメ部２２を利用して挿着する。
磁性片１７の固定を確実にするために、磁性片１７の円
周面１９の水平方向長さＬ１は絶縁枠１４の磁界修正部
１８に設置されたストッパー部２１とツメ部２２との間
の長さＬ２よりやや大きいプラス公差にするのが望まし
い。磁性片１７を挿着した後、凸部２０を用い円周方向
に移動することによりツメ部２２の間の任意の位置で固
定することが可能となる。FIG. 1, FIG. 2 (a), FIG. 2 (b) and FIG.
In (c), the magnetic piece 17 is composed of the circumferential surface 19 and the convex portion 20 at the center of the end portion, and the magnetic field correcting portion 1 of the insulating frame 14 is also included.
Reference numeral 8 is composed of a stopper portion 21 matching the shape of the magnetic piece 17 and a claw portion 22 facing the stopper portion 21. The magnetic field correction unit 18 holds the 17 convex portions 20 of the magnetic piece, and
The circumferential surface 19 of 7 is applied to the stopper portion 21 of the magnetic field correcting portion 18 (indicated by a dotted line) while being slightly inclined, and then pushed in the axial direction of the tube to be attached using the tab portion 22.
In order to secure the fixing of the magnetic piece 17, the horizontal length L1 of the circumferential surface 19 of the magnetic piece 17 is set between the stopper portion 21 and the claw portion 22 installed in the magnetic field correcting portion 18 of the insulating frame 14. It is desirable to have a tolerance slightly larger than the length L2. After the magnetic piece 17 is inserted and attached, it is possible to fix the magnetic piece 17 at an arbitrary position between the claw portions 22 by moving the convex portion 20 in the circumferential direction.
【００２０】以上のように構成された偏向ヨークについ
て、その動作を説明する。図３は本発明の偏向ヨークの
ＣＲＴ管軸と垂直な面での断面図で、上側コイル２と下
側コイル３に電流が流れると、水平磁界７が誘起され、
これにより、赤、青と緑ビーム（Ｒ、ＢとＧ）を水平方
向に偏向している。緑ビーム（Ｇ）はセンタービームで
あるが、便宜上図示していない。The operation of the deflection yoke constructed as above will be described. FIG. 3 is a sectional view of the deflection yoke of the present invention taken along a plane perpendicular to the CRT tube axis. When a current flows through the upper coil 2 and the lower coil 3, a horizontal magnetic field 7 is induced,
As a result, the red, blue and green beams (R, B and G) are deflected in the horizontal direction. The green beam (G) is a center beam, but is not shown for convenience.
【００２１】図３に示しているような上側コイル２の磁
界が強い上下非対称な水平磁界７での前記ミスコンバー
ゼンスを本発明の実施例の磁性片１７で補正する方法に
ついて述べる。磁性片１７は珪素鋼板やパーマロイ等の
高透磁率の磁性体で形成されており周辺の磁界を収拾し
て強める働きがある。上側にスライドした図３に示すよ
うな上下非対称な水平磁界７の場合、そのスライド分に
見合った程度、磁界修正部１８に装着されている左右の
磁性片１７の凸部２０を用いて、円周方向に沿って下方
に移動させる（矢印にて示している）ことにより、上下
対称に補正できる。A method of correcting the above-mentioned misconvergence in the vertical asymmetric horizontal magnetic field 7 in which the magnetic field of the upper coil 2 is strong as shown in FIG. 3 will be described with the magnetic piece 17 of the embodiment of the present invention. The magnetic piece 17 is made of a magnetic material having a high magnetic permeability such as a silicon steel plate or permalloy, and has a function of collecting and strengthening the surrounding magnetic field. In the case of a vertically asymmetrical horizontal magnetic field 7 as shown in FIG. 3 which is slid upward, the convex portions 20 of the left and right magnetic pieces 17 attached to the magnetic field correction unit 18 are used to the extent corresponding to the sliding amount. By moving downward (indicated by an arrow) along the circumferential direction, it is possible to correct vertically symmetrically.
【００２２】図４は上下非対称な水平磁界を本発明の偏
向ヨークで補正した図である。図４において、上下非対
称な水平磁界７が磁性片１７の働きにより上下対称に補
正されるので前記ミスコンバーゼンスを低減することが
できる。FIG. 4 is a diagram in which a vertically asymmetric horizontal magnetic field is corrected by the deflection yoke of the present invention. In FIG. 4, the vertically asymmetric horizontal magnetic field 7 is vertically symmetrically corrected by the action of the magnetic piece 17, so that the misconvergence can be reduced.
【００２３】さて、図３および図４において、右側の磁
性片１７の働きについて説明する。右側偏向の初期にお
いて、赤ビームＲは青ビームＢより右側に位置している
ので、右側の磁性片１７に近く、左側の磁性片１７より
も右側の磁性片１７の影響を受けやすい。それ故、右側
の磁性片１７を円周方向の下方に移動させると、赤ビー
ムＲは青ビームＢより下側の力を受ける。また、右側の
磁性片１７を円周方向の上方に移動させると赤ビームＲ
は青ビームＢより上側の力を受ける。Now, the function of the right magnetic piece 17 will be described with reference to FIGS. 3 and 4. Since the red beam R is located on the right side of the blue beam B in the initial stage of the right deflection, the red beam R is closer to the right magnetic piece 17 and is more susceptible to the right magnetic piece 17 than the left magnetic piece 17. Therefore, when the right magnetic piece 17 is moved downward in the circumferential direction, the red beam R receives a lower force than the blue beam B. Further, when the right magnetic piece 17 is moved upward in the circumferential direction, the red beam R
Receives a force above the blue beam B.
【００２４】次に、左側の磁性片１７の働きについて説
明する。左側偏向の初期において青ビームＢは赤ビーム
Ｒより左側に位置しているので、左側の磁性片１７に近
く、右側の磁性片１７よりも左側の磁性片１７の影響を
受けやすい。それ故、左側の磁性片１７を円周方向の下
方に移動させると青ビームＢは赤ビームＲより下側の力
を受ける。また、左側の磁性片１７を円周方向の上方に
移動させると青ビームＢは赤ビームＲより上側の力を受
ける。実際の補正方法としては、ＣＲＴ画面上に現れる
水平軸上のミスコンバーゼンスパターンのミスコンバー
ゼンスの程度をを見ながら、前述の磁性片１７の働きを
考慮して、磁性片１７の凸部２０を手動若しくは治具を
用いて、円周方向の上方若しくは下方に移動させてＣＲ
Ｔ画面のミスコンバーゼンスが最小になるところで固定
する。Next, the function of the left magnetic piece 17 will be described. Since the blue beam B is located on the left side of the red beam R in the initial stage of the left-side deflection, it is closer to the left magnetic piece 17 and is more susceptible to the left magnetic piece 17 than the right magnetic piece 17. Therefore, when the left magnetic piece 17 is moved downward in the circumferential direction, the blue beam B receives a lower force than the red beam R. When the left magnetic piece 17 is moved upward in the circumferential direction, the blue beam B receives a force above the red beam R. As an actual correction method, the convex portion 20 of the magnetic piece 17 is manually adjusted in consideration of the function of the magnetic piece 17 while observing the degree of misconvergence of the misconvergence pattern on the horizontal axis appearing on the CRT screen. Or, using a jig, move it upward or downward in the circumferential direction to CR
Fix at the point where the misconvergence of the T screen becomes the minimum.
【００２５】例えば、図５（ａ）に示す上下非対称な水
平磁界によるミスコンバーゼンスパターン図の場合、右
端で赤ビームＲを上げ、左端で青ビームＢを上げるため
に、図５（ｂ）に示す本発明の偏向ヨークによる補正図
のように、磁性片１７の凸部２０を用いて左右の磁性片
１７をともに円周方向の上方に移動させ、上下対称な水
平磁界７に補正することができる。For example, in the case of the misconvergence pattern diagram due to the vertically asymmetric horizontal magnetic field shown in FIG. 5A, the red beam R is raised at the right end and the blue beam B is raised at the left end, as shown in FIG. 5B. As shown in the correction diagram by the deflection yoke of the present invention, both the left and right magnetic pieces 17 can be moved upward in the circumferential direction by using the convex portions 20 of the magnetic pieces 17 to correct the horizontal magnetic field 7 which is vertically symmetrical. .
【００２６】なお、同様の原理にて図６（ａ）に示す上
下非対称な水平磁界によるミスコンバーゼンスパターン
図の場合、右端で赤ビームＲを下げ、左端で青ビームＢ
を上げるために、図６（ｂ）に示す本発明の偏向ヨーク
による補正図のように、右側の磁性片１７を円周方向の
下方に、左側の磁性片１７を円周方向の下方に移動さ
せ、上下対称な水平磁界７に補正することができる。Incidentally, in the case of the misconvergence pattern diagram due to the vertically asymmetric horizontal magnetic field shown in FIG. 6A based on the same principle, the red beam R is lowered at the right end and the blue beam B at the left end.
6B, the magnetic piece 17 on the right side is moved downward in the circumferential direction and the magnetic piece 17 on the left side is moved downward in the circumferential direction, as shown in the correction diagram of the deflection yoke of the present invention shown in FIG. 6B. Thus, it is possible to correct the horizontal magnetic field 7 which is vertically symmetrical.
【００２７】また、図７（ａ）に示す上下非対称な水平
磁界によるミスコンバーゼンスパターン図の場合、右端
で赤ビームＲを下げるために、図７（ｂ）に示す本発明
の偏向ヨークによる補正図のように、右側の磁性片１７
を円周方向の下方に移動させ、上下対称な水平磁界７に
補正することができる。Further, in the case of the misconvergence pattern diagram due to the vertically asymmetric horizontal magnetic field shown in FIG. 7A, in order to lower the red beam R at the right end, the correction diagram by the deflection yoke of the present invention shown in FIG. 7B. Like the magnetic piece 17 on the right side
Can be moved downward in the circumferential direction to correct the vertical symmetric horizontal magnetic field 7.
【００２８】ところで、前記磁性片１７の円周面１９の
水平方向の長さＬ１を絶縁枠１４の磁界修正部１８に設
置されたストッパー部２１とツメ部２２との間の長さＬ
２に対してプラス公差になるようにすると、磁性片１７
の凸部２０を用いて円周方向に移動させてツメ部２２の
間の任意の位置で止めた場合、その位置で確実に固定で
きるので補正作業が容易になるという利点もある。By the way, the length L1 of the circumferential surface 19 of the magnetic piece 17 in the horizontal direction is defined by the length L between the stopper portion 21 and the claw portion 22 installed in the magnetic field correcting portion 18 of the insulating frame 14.
If the tolerance is positive with respect to 2, the magnetic piece 17
When the convex portions 20 are moved in the circumferential direction and stopped at arbitrary positions between the claw portions 22, the correction work can be facilitated because they can be surely fixed at those positions.
【００２９】また、前記磁性片１７は、前記水平偏向コ
イル１の長手巻線部６のネック側に対応するところで、
垂直偏向コイル１６のネック側端面と水平偏向コイル１
のネック側のベンドアップ部５の間にありその中心が水
平管軸に一致する左右の磁界修正部１８を有する絶縁枠
１４の前記磁界修正部１８に挿着されるため、極めて水
平磁界７が強いところに位置している。従って、磁性片
１７による前記上下非対称な水平磁界７の補正は非常に
強く行われることになる。The magnetic piece 17 corresponds to the neck side of the longitudinal winding portion 6 of the horizontal deflection coil 1,
The end of the vertical deflection coil 16 on the neck side and the horizontal deflection coil 1
Since it is inserted into the magnetic field correction section 18 of the insulating frame 14 which has the left and right magnetic field correction sections 18 whose center lies between the bend-up sections 5 on the side of and the horizontal tube axis, an extremely horizontal magnetic field 7 is generated. It is located in a strong place. Therefore, the correction of the vertically asymmetric horizontal magnetic field 7 by the magnetic piece 17 is very strongly performed.
【００３０】[0030]
【発明の効果】以上のように本発明の偏向ヨークは、絶
縁枠の左右の外周面の一部に設けられた磁界修正部に磁
性片を挿着し、水平磁界の強い長手巻線部のネック部に
対応するところで磁性片が円周方向に移動され、且つ、
磁界修正部のツメ部の間の任意の位置で固定することが
できるため、差動コイル装置を用いる場合に生じた電力
損失を生じることがなく、また水平偏向コイルの偏向効
率が低下することもなく、水平偏向コイルの上下非対称
な水平磁界によって生ずるミスコンバーゼンスを容易に
効率よく低減することができる優れた偏向ヨークを実現
できるものである。As described above, according to the deflection yoke of the present invention, the magnetic piece is attached to the magnetic field correcting portion provided on a part of the left and right outer peripheral surfaces of the insulating frame, and the longitudinal winding portion having a strong horizontal magnetic field is formed. The magnetic piece is moved in the circumferential direction at a position corresponding to the neck portion, and
Since it can be fixed at any position between the claw portions of the magnetic field correction unit, there is no power loss that occurs when using the differential coil device, and the deflection efficiency of the horizontal deflection coil is reduced. In other words, it is possible to realize an excellent deflection yoke capable of easily and efficiently reducing the misconvergence caused by the vertically asymmetric horizontal magnetic field of the horizontal deflection coil.
【図１】本発明の実施例における偏向ヨークの外観斜視
図FIG. 1 is an external perspective view of a deflection yoke according to an embodiment of the present invention.
【図２】（ａ）絶縁枠に設けられた磁界修正部の拡大斜
視図 （ｂ）磁性片の拡大斜視図 （ｃ）磁界修正部に磁性片を挿着する方法を示した図FIG. 2A is an enlarged perspective view of a magnetic field correction portion provided on an insulating frame. FIG. 2B is an enlarged perspective view of a magnetic piece. FIG. 2C is a diagram showing a method of inserting the magnetic piece into the magnetic field correction portion.
【図３】本発明の偏向ヨークのＣＲＴ管軸と垂直な面で
の断面図FIG. 3 is a sectional view of a deflection yoke of the present invention in a plane perpendicular to the CRT tube axis.
【図４】上下非対称な水平磁界を本発明の偏向ヨークで
補正した図FIG. 4 is a diagram in which a vertically asymmetric horizontal magnetic field is corrected by the deflection yoke of the present invention.
【図５】（ａ）他の上下非対称な水平磁界によるミスコ
ンバーゼンスパターン図 （ｂ）本発明の偏向ヨークによる補正図5A is a misconvergence pattern diagram due to another vertically asymmetric horizontal magnetic field; FIG. 5B is a correction diagram with the deflection yoke of the present invention.
【図６】（ａ）他の上下非対称な水平磁界によるミスコ
ンバーゼンスパターン図 （ｂ）本発明の偏向ヨークによる補正図FIG. 6A is a misconvergence pattern diagram due to another vertically asymmetric horizontal magnetic field. FIG. 6B is a correction diagram by the deflection yoke of the present invention.
【図７】（ａ）他の上下非対称な水平磁界によるミスコ
ンバーゼンスパターン図 （ｂ）本発明の偏向ヨークによる補正図FIG. 7A is a misconvergence pattern diagram due to another vertically asymmetric horizontal magnetic field. FIG. 7B is a correction diagram by the deflection yoke of the present invention.
【図８】水平偏向コイルの外観斜視図FIG. 8 is an external perspective view of a horizontal deflection coil.
【図９】（ａ）従来の実際の偏向ヨークによる上下非対
称な水平磁界図 （ｂ）従来の実際の偏向ヨークによる上下非対称な水平
磁界による赤と青ビームの軌跡を示すＣＲＴ画面図FIG. 9A is a vertical asymmetric horizontal magnetic field diagram by a conventional actual deflection yoke. FIG. 9B is a CRT screen diagram showing trajectories of red and blue beams due to a vertical asymmetric horizontal magnetic field by a conventional actual deflection yoke.
【図１０】（ａ）差動コイル装置の断面図 （ｂ）差動コイル装置を水平偏向コイルに接続した配線
図10A is a cross-sectional view of a differential coil device, and FIG. 10B is a wiring diagram in which the differential coil device is connected to a horizontal deflection coil.
１ 水平偏向コイル ２ 上側コイル ３ 下側コイル ４、５ ベンドアップ部 ６ 長手巻線部 ７ 水平磁界 ８ 第１のコイル ９ 第２のコイル １０ コア １１ コイルボビン １４ 絶縁枠 １５ 環状コア １６ 垂直偏向コイル １７ 磁性片 １８ 磁界修正部 １９ 円周面 ２０ 凸部 ２１ ストッパー部 ２２ ツメ部 1 horizontal deflection coil 2 upper side coil 3 lower side coil 4, 5 bend up part 6 longitudinal winding part 7 horizontal magnetic field 8 first coil 9 second coil 10 core 11 coil bobbin 14 insulating frame 15 annular core 16 vertical deflection coil 17 Magnetic piece 18 Magnetic field correction part 19 Circumferential surface 20 Convex part 21 Stopper part 22 Claw part
【手続補正書】[Procedure amendment]
【提出日】平成７年１月３１日[Submission date] January 31, 1995
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図１０[Name of item to be corrected] Fig. 10
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１０】差動コイル装置を示す図FIG. 10 is a diagram showing a differential coil device.
Claims (2)
環状コアと、前記環状コアに巻回された垂直偏向コイル
と、前記水平偏向コイルと前記垂直偏向コイルの間に設
けられるとともに前記水平偏向コイルのネック側ベンド
アップ部近傍に一対の磁界修正部が設けられた絶縁枠
と、前記磁界修正部に挿着される磁性片を備えたもので
あって、前記磁性片は前記磁界修正部内を円周方向に移
動することができることを特徴とする偏向ヨーク。1. A saddle-shaped contoured horizontal deflection coil, a pair of annular cores, a vertical deflection coil wound around the annular cores, and provided between the horizontal deflection coil and the vertical deflection coil. A horizontal deflection coil is provided with an insulating frame having a pair of magnetic field correction portions near the bend-up portion on the neck side, and a magnetic piece inserted into the magnetic field correction portion, the magnetic piece being the magnetic field correction portion. A deflection yoke, characterized in that it can be moved in the circumferential direction inside the section.
軸方向幅を前記磁界修正部に設置されたストッパー部と
ツメ部との間の長さに対してプラス公差になるようにし
たことを特徴とする請求項１記載の偏向ヨーク。2. The magnetic piece has a circumferential surface, and the axial width of the circumferential surface is a plus tolerance with respect to the length between the stopper portion and the claw portion installed in the magnetic field correcting portion. The deflection yoke according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24967094A JP3473129B2 (en) | 1994-10-14 | 1994-10-14 | Deflection yoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24967094A JP3473129B2 (en) | 1994-10-14 | 1994-10-14 | Deflection yoke |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08115686A true JPH08115686A (en) | 1996-05-07 |
| JP3473129B2 JP3473129B2 (en) | 2003-12-02 |
Family
ID=17196466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24967094A Expired - Fee Related JP3473129B2 (en) | 1994-10-14 | 1994-10-14 | Deflection yoke |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3473129B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6211610B1 (en) | 1997-07-15 | 2001-04-03 | Nec Corporation | Color cathode ray tube with first and second magnetic compensators |
-
1994
- 1994-10-14 JP JP24967094A patent/JP3473129B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6211610B1 (en) | 1997-07-15 | 2001-04-03 | Nec Corporation | Color cathode ray tube with first and second magnetic compensators |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3473129B2 (en) | 2003-12-02 |
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