JPH02142037A - Deflection yoke - Google Patents
Deflection yokeInfo
- Publication number
- JPH02142037A JPH02142037A JP29488188A JP29488188A JPH02142037A JP H02142037 A JPH02142037 A JP H02142037A JP 29488188 A JP29488188 A JP 29488188A JP 29488188 A JP29488188 A JP 29488188A JP H02142037 A JPH02142037 A JP H02142037A
- Authority
- JP
- Japan
- Prior art keywords
- loop
- magnetic field
- horizontal deflection
- coil
- deflection coil
- 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
- 238000004804 winding Methods 0.000 claims description 15
- 230000005855 radiation Effects 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 9
- 239000004020 conductor Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/0007—Elimination of unwanted or stray electromagnetic effects
- H01J2229/0015—Preventing or cancelling fields leaving the enclosure
- H01J2229/0023—Passive means
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、テレビジョン受像機あるいはＣＲＴ表示装置
等に装着される、不要輻射の低減された偏向ヨークに関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a deflection yoke with reduced unnecessary radiation, which is attached to a television receiver, a CRT display device, or the like.
近年、コンピューターの端末機器等のＣＲＴ表示装置か
らの不要輻射のうち特に周波数の高い水平偏向コイルか
らの不要輻射が、近くにある他の端末機器に誤動作を生
じさせる等の悪影響をおよぼし問題になっている。この
ためこれらＣＲＴ表示装置の不要輻射低減が強く要望さ
れている。不要輻射の発生源としては、偏向ヨーク、フ
ライバックトランス、サイズコイル、リニアコイル等が
挙げられるが、主な発生源は偏向ヨークである。この偏
向ヨークから外部へ漏れる磁界のうち、管軸方向へ漏れ
る磁界以外はシールドすることが可能であるが、管面側
から漏洩する磁界についてはシールドすることが不可能
であり、今まで一般に何の対策もとられていなかった。In recent years, unnecessary radiation from CRT display devices such as computer terminal equipment, particularly unnecessary radiation from high-frequency horizontal deflection coils, has become a problem as it has an adverse effect on other nearby terminal equipment, such as causing malfunctions. ing. Therefore, there is a strong demand for reducing unnecessary radiation from these CRT display devices. Sources of unnecessary radiation include deflection yokes, flyback transformers, size coils, linear coils, etc., but the main source is the deflection yoke. Among the magnetic fields leaking to the outside from this deflection yoke, it is possible to shield the magnetic fields other than those leaking in the direction of the tube axis, but it is impossible to shield the magnetic fields leaking from the tube surface side. No countermeasures were taken.
しかし最近になり、不要輻射を低減するために、偏向ヨ
ークに補助コイルを付加し、漏れ磁界とは逆向きの磁界
を発生させることで、これら不要輻射を打ち消し低減さ
せようとする試みがなされている０例えば、特開昭６２
−８２６３２号、特開昭６３−１９７３９号等にその技
術が開示されている。このうち前者においては、水平偏
向コイル１とほぼ相似の上下一対のクラ型コイルアを形
成し、偏向ヨークの外側に配置し、水平偏向電流を通電
することによって水平偏向コイルの渡り線部５から発生
する漏れ磁界３を打ち消す方向の磁界４′を発生させる
ものであり、後者のものは、コア６の外部で偏向ヨーク
のＸ軸、若しくはＸ軸近傍にループ状に形成した補助コ
イル８をコアに対して見掛は上トロイダル状に巻回配置
し、偏向ヨークからの漏れ磁界を打ち消す磁界をループ
状の補助コイル８から発生させ、不要輻射レベルを低減
させるものである。（第５図参照）〔発明が解決しよう
とする課題）
不要輻射を低減すべく構成された上記偏向ヨークは、い
ずれも漏れ磁界を打ち消す磁界を発生させるコイルとコ
アとの結合が強いため、本来の偏向ヨーク内の水平偏向
磁界まで打ち消す結果、水平偏向感度を著しく悪化させ
ている。又、これらの磁界発生用の補助コイルは、水平
偏向コイルとは別巻線で形成されるため高価であり、組
立作業等が煩雑である０本発明は、上記欠点に鑑みなさ
れたものであり、偏向ヨークの特性を悪化させることな
く不要輻射を効率よく低減させることができ、安価な偏
向ヨークを提供しようとするものである。However, recently, attempts have been made to reduce unnecessary radiation by adding an auxiliary coil to the deflection yoke and generating a magnetic field in the opposite direction to the leakage magnetic field. For example, JP-A-62
The technique is disclosed in Japanese Patent Application Laid-Open No. 1973-82632 and Japanese Patent Application Laid-open No. 1973-1983. In the former case, a pair of upper and lower crane-shaped coils that are almost similar to the horizontal deflection coil 1 are formed, and are placed outside the deflection yoke, and the horizontal deflection current is passed through the horizontal deflection coil to generate electricity from the connecting wire portion 5 of the horizontal deflection coil. The latter generates a magnetic field 4' in a direction that cancels out the leakage magnetic field 3, and the latter uses an auxiliary coil 8 formed in a loop outside the core 6 on the X axis of the deflection yoke or near the X axis. On the other hand, the coils are apparently wound in an upper toroidal shape, and a loop-shaped auxiliary coil 8 generates a magnetic field that cancels out the leakage magnetic field from the deflection yoke, thereby reducing the unnecessary radiation level. (See Figure 5) [Problem to be Solved by the Invention] The above-mentioned deflection yokes configured to reduce unnecessary radiation are inherently As a result, the horizontal deflection magnetic field within the deflection yoke is canceled out, significantly worsening the horizontal deflection sensitivity. In addition, these auxiliary coils for generating magnetic fields are formed with separate windings from the horizontal deflection coils, so they are expensive and the assembly work is complicated.The present invention was made in view of the above drawbacks. The present invention aims to provide an inexpensive deflection yoke that can efficiently reduce unnecessary radiation without deteriorating the characteristics of the deflection yoke.
本発明は、ＣＲＴに装着される偏向ヨークを構成する一
対のクラ型水平偏向コイルのファンネル側、又は／及び
電子銃側の渡り線部の外側に、水平偏向コイルを構成す
る導線の一部からなり、所定巻数を有し、渡り線部の巻
線とは巻方向が逆のループを設けることにより、水平偏
向コイルの発生する偏向磁界とは逆向きの磁界をこのル
ープから発生させ、不要輻射を低減するよう構成するも
のである。The present invention provides a method for connecting a part of the conductive wires constituting the horizontal deflection coils to the outside of the funnel side of a pair of crane-shaped horizontal deflection coils constituting a deflection yoke mounted on a CRT, and/or the crossover wire portion on the electron gun side. By providing a loop with a predetermined number of turns and a winding direction opposite to that of the winding in the crossover section, a magnetic field in the opposite direction to the deflection magnetic field generated by the horizontal deflection coil is generated from this loop, thereby eliminating unnecessary radiation. It is configured to reduce the
水平偏向コイルからの不要輻射は、水平偏向コイルを構
成する導線の一部渡り線部の外側に設けられるループか
ら発生する水平偏向磁界とは逆向きの磁界によって打ち
消される。Unnecessary radiation from the horizontal deflection coil is canceled by a magnetic field in the opposite direction to the horizontal deflection magnetic field generated from a loop provided outside a partial crossover portion of the conducting wire constituting the horizontal deflection coil.
第１〜第３図は、本発明の一実施例を示すものであり、
第１図は偏向ヨークをファンネル側から見たときの構成
図、第２図は第１図＾−Ａ′線における断面図、第３図
は水平偏向コイルとループの巻線構成を説明するための
図である６図において１は、水平偏向コイル、２はルー
プ、３は漏れ磁界、４はループにより発生する磁界、５
はファンネル側の水平偏向コイルの渡り線部である０本
発明の特徴であるループ２は、水平偏向コイル１を構成
する導線と連続する導線で形成され、第３図の■に示す
巻方向に所定巻回数巻線され、渡り線部５の水平偏向コ
イル巻方向とは逆巻きされて構成される。このように形
成されたループ２は第２図の破線で示される向きの磁界
４を発生する。また、水平偏向コイル１からは第２図実
線で示される向きの漏れ磁界３が発生している。従って
、ループ２の磁界４は水平偏向コイル１からの漏れ磁界
３を打ち消すよう作用する。ここで、ループ２の構成は
水平偏向コイル１の巻数等と相関性から決定され概略水
平偏向コイルの巻線長の１０〜２０％で構成される。こ
のループ２は水平偏向コイル１の１ターン毎にループの
１ターンを巻回して形成するか、或は水平偏向コイル１
の巻始めまたは巻終りを所定数ループ状に巻回して形成
することもできる。水平偏向コイルの１ターン毎にルー
プの１ターンを形成した水平偏向コイル１の場合には、
水平偏向コイル１内部の熱が各巻ターンの導線を通しル
ープ２で冷却されるので冷却効果が向上するという利点
がある０以上の説明は、ループ２がファンネル側の渡り
線部にのみ形成された場合であるが、ループ２が電子銃
側、又はファンネル側と電子銃側の両方に設けられた場
合（第４図）においても全く同じ作用、効果を有するも
ので、説明が重複するので省略する。尚、実施例におけ
る水平偏向コイルは、一般のクラ型コイルで説明したが
、本発明はボビンに溝を設けて巻線する所謂スリット巻
であっても全く同様に実施し得、回し作用、効果を有す
る。という効果もある。1 to 3 show an embodiment of the present invention,
Figure 1 is a configuration diagram of the deflection yoke viewed from the funnel side, Figure 2 is a cross-sectional view taken along line A' in Figure 1, and Figure 3 is for explaining the winding configuration of the horizontal deflection coil and loop. In Figure 6, 1 is a horizontal deflection coil, 2 is a loop, 3 is a leakage magnetic field, 4 is a magnetic field generated by the loop, and 5
is a crossover portion of the horizontal deflection coil on the funnel side.The loop 2, which is a feature of the present invention, is formed by a conductor that is continuous with the conductor that constitutes the horizontal deflection coil 1, and is wound in the winding direction shown in ■ in Fig. 3. The wire is wound a predetermined number of turns, and is wound in the opposite direction to the winding direction of the horizontal deflection coil of the crossover portion 5. The loop 2 thus formed generates a magnetic field 4 oriented as shown by the dashed line in FIG. Further, a leakage magnetic field 3 is generated from the horizontal deflection coil 1 in the direction shown by the solid line in FIG. Therefore, the magnetic field 4 of the loop 2 acts to cancel the leakage field 3 from the horizontal deflection coil 1. Here, the configuration of the loop 2 is determined based on the correlation with the number of turns of the horizontal deflection coil 1, and is approximately 10 to 20% of the winding length of the horizontal deflection coil. This loop 2 is formed by winding one turn of the loop for each turn of the horizontal deflection coil 1, or
It can also be formed by winding a predetermined number of loops at the beginning or end of the winding. In the case of horizontal deflection coil 1 in which one turn of the loop is formed for each turn of the horizontal deflection coil,
The heat inside the horizontal deflection coil 1 passes through the conductor wire of each winding turn and is cooled in the loop 2, which has the advantage of improving the cooling effect.The explanation above is based on the fact that the loop 2 is formed only at the crossover wire on the funnel side. However, even when loop 2 is provided on the electron gun side or on both the funnel side and the electron gun side (Fig. 4), it has exactly the same function and effect, so the explanation will be omitted as it will be redundant. . Although the horizontal deflection coil in the embodiment has been described as a general Kula-type coil, the present invention can be implemented in exactly the same manner even with so-called slit winding in which a bobbin is provided with grooves, and the winding action and effect will be improved. has. There is also this effect.
本発明は水平偏向コイルによって生じる水平偏向磁界の
向きと逆向きの磁界を発生するループを水平偏向コイル
の渡り線部の外側に設けたものであるので、ループとコ
アとの距離が大きく、ループとコアとの結合が比較的弱
くなるのでループにより発生する磁界が、偏向ヨーク内
の偏向に寄与する磁界に対してほとんど影響を与えるこ
となく偏向ヨークからの不要輻射レベルを低減すること
が可能になる。又、本発明によるループは、水平偏向コ
イルの一部として同時に巻線されるので安価である。更
に水平偏向コイル内部の熱をこのループによって放熱す
ることも可能になるという効果を有する。In the present invention, a loop that generates a magnetic field in the opposite direction to the horizontal deflection magnetic field generated by the horizontal deflection coil is provided outside the crossover portion of the horizontal deflection coil, so the distance between the loop and the core is large, and the loop Since the coupling between the loop and the core is relatively weak, the magnetic field generated by the loop has almost no effect on the magnetic field that contributes to deflection within the deflection yoke, making it possible to reduce the level of unnecessary radiation from the deflection yoke. Become. Also, the loop according to the invention is inexpensive because it is simultaneously wound as part of the horizontal deflection coil. Furthermore, it has the effect that the heat inside the horizontal deflection coil can be dissipated through this loop.
第１図は、本発明の一実施例を示す偏向ヨークをファン
ネル側から見た図、第２図は第１図Ａ −Ａ′線におけ
る断面図、第３図は水平偏向コイルとループの巻線を説
明するための図、第４図は本発明の他の実施例、第５図
は従来例を示す図である。
１：水平偏向コイル、２：ルーブ、３：漏れ磁界、４：
ループによる磁界、５．５’：渡り線部筒
図
第
図
平成１年３月６日
６．補正の内容Fig. 1 is a view of a deflection yoke showing an embodiment of the present invention as seen from the funnel side, Fig. 2 is a sectional view taken along the line A-A' in Fig. 1, and Fig. 3 is a horizontal deflection coil and a loop winding. 4 shows another embodiment of the present invention, and FIG. 5 shows a conventional example. 1: Horizontal deflection coil, 2: Lube, 3: Leakage magnetic field, 4:
Magnetic field due to loop, 5.5': Crossing line cylinder diagram, March 6, 1999, 6. Contents of correction
Claims (1)
いて、クラ型水平偏向コイルのフアンネル側又は／及び
電子銃側の渡り線部の外側に、クラ型水平偏向コイルを
構成する導線の一部からなり、前記渡り線部の巻方向と
逆に所定数巻回されたループを設け、このループから偏
向に寄与する磁界と逆向きの磁界を発生せしめることを
特徴とする偏向ヨーク。In a deflection yoke that uses a Kula-shaped horizontal deflection coil as a horizontal deflection coil, a part of the conducting wire constituting the Kula-shaped horizontal deflection coil is placed on the outside of the crossover wire on the funnel side and/or electron gun side of the Kula-shaped horizontal deflection coil. A deflection yoke characterized in that a loop is wound a predetermined number of times in the opposite direction to the winding direction of the crossover wire portion, and a magnetic field in the opposite direction to a magnetic field contributing to deflection is generated from this loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63294881A JPH0677441B2 (en) | 1988-11-22 | 1988-11-22 | Deflection yoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63294881A JPH0677441B2 (en) | 1988-11-22 | 1988-11-22 | Deflection yoke |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02142037A true JPH02142037A (en) | 1990-05-31 |
| JPH0677441B2 JPH0677441B2 (en) | 1994-09-28 |
Family
ID=17813458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63294881A Expired - Lifetime JPH0677441B2 (en) | 1988-11-22 | 1988-11-22 | Deflection yoke |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0677441B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006347124A (en) * | 2005-06-20 | 2006-12-28 | Funai Electric Co Ltd | Image forming apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6270355U (en) * | 1985-10-22 | 1987-05-02 | ||
| JPS6319739A (en) * | 1986-07-09 | 1988-01-27 | Denki Onkyo Co Ltd | Deflecting yoke device |
-
1988
- 1988-11-22 JP JP63294881A patent/JPH0677441B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6270355U (en) * | 1985-10-22 | 1987-05-02 | ||
| JPS6319739A (en) * | 1986-07-09 | 1988-01-27 | Denki Onkyo Co Ltd | Deflecting yoke device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006347124A (en) * | 2005-06-20 | 2006-12-28 | Funai Electric Co Ltd | Image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0677441B2 (en) | 1994-09-28 |
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