JPS6282633A - Deflection yoke - Google Patents
Deflection yokeInfo
- Publication number
- JPS6282633A JPS6282633A JP22429985A JP22429985A JPS6282633A JP S6282633 A JPS6282633 A JP S6282633A JP 22429985 A JP22429985 A JP 22429985A JP 22429985 A JP22429985 A JP 22429985A JP S6282633 A JPS6282633 A JP S6282633A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- horizontal deflection
- deflection yoke
- deflection
- magnetic field
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/003—Arrangements for eliminating unwanted electromagnetic effects, e.g. demagnetisation arrangements, shielding coils
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野Ｊ
この発明は不要輻射レベルの低減を図った偏向ヨークに
関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] This invention relates to a deflection yoke that aims to reduce the level of unnecessary radiation.
［従来の技術］
例えば、***Ｖ Ｄ Ｅ （Ｖｅｒｂａｎｄ Ｄｅｕｔ
ｓｃｈｅｒ Ｅｌｅｋｔｏｒｏｔｅｃｈｎｉｋｅｒ ）
規格で要求される不要輻射規制周波数は、ｌｏＫＨｚ以
上となっており、陰極線管表示装置では、水平偏向電流
により発生する不要輻射が問題となる。[Prior art] For example, West German VDE (Verband Deut
scher Elektrotechniker)
The unnecessary radiation regulation frequency required by the standard is loKHz or higher, and unnecessary radiation generated by horizontal deflection current becomes a problem in cathode ray tube display devices.
不要輻射は、水平偏向電流が流れる偏向ヨーク、フライ
バックトランス、水平幅調整コイル、および水平リニャ
リティ調整コイルの漏れ磁界がその原因となり、外部へ
の不要輻射量のうち、偏向ヨークが約７０％、フライバ
ックトランスが約２０％、水平幅調整コイルなどが約１
０％の割合を占めている。Unwanted radiation is caused by leakage magnetic fields from the deflection yoke through which the horizontal deflection current flows, the flyback transformer, the horizontal width adjustment coil, and the horizontal linearity adjustment coil. Of the amount of unnecessary radiation to the outside, the deflection yoke accounts for approximately 70%. Flyback transformer accounts for approximately 20%, horizontal width adjustment coil, etc. accounts for approximately 1%.
It accounts for 0%.
第５図（ａ）は偏向ヨーク（１）の側面図で、コア（ｌ
ａ）と、水平偏向コイル（ｌｂ）のみを示したものであ
る。また、同図（ｂ）は水平偏向コイル（１ｂ）のみを
前側、つまり陰極線管（２）のファンネル側からみた正
面図で、水平偏向コイル（Ｉｂ）に水平偏向電流が流れ
ると、ある瞬間において破線の矢印で示した方向の磁界
が生じる。この場合、コア（１ａ）で囲まれている空間
内には、垂直方向の水平偏向磁界（８ｃ）が発生し１．
同時に水平偏向コイル（１ｂ）の前後のわたり線部（ｌ
ｃ） 、 （ｌｄ）には、それぞれ漏れ磁界（８ａ）
、 （Ｇｂ）が発生して外部空間に輻射される。FIG. 5(a) is a side view of the deflection yoke (1), and shows the core (l).
a) and only the horizontal deflection coil (lb) are shown. Also, Figure (b) is a front view of only the horizontal deflection coil (1b) seen from the front side, that is, from the funnel side of the cathode ray tube (2).When a horizontal deflection current flows through the horizontal deflection coil (Ib), at a certain moment, A magnetic field is generated in the direction indicated by the dashed arrow. In this case, a horizontal deflection magnetic field (8c) in the vertical direction is generated in the space surrounded by the core (1a).1.
At the same time, the front and rear crossing wires (l) of the horizontal deflection coil (1b)
c) and (ld) have leakage magnetic fields (8a), respectively.
, (Gb) is generated and radiated to the external space.
第６図は従来の不要輻射防止装置を備えた陰極線管表示
装置の一部分解斜視図で、陰極線管（２）に装着された
偏向ヨーク（１）、および図示していないフライバック
トランスなどの不要輻射発生源を、良導電性の金属板ま
たは磁性体で形成されている筐体（３）、放熱板（４）
およびカバー（５）でとり囲み、漏れ磁界を内部に閉じ
込めることにより、外部への不要輻射レベルの低減を図
っていた。Figure 6 is a partially exploded perspective view of a cathode ray tube display device equipped with a conventional unnecessary radiation prevention device, including a deflection yoke (1) attached to a cathode ray tube (2) and unnecessary components such as a flyback transformer (not shown). The radiation source is a housing (3) made of a highly conductive metal plate or a magnetic material, and a heat sink (4).
and a cover (5) to confine the leakage magnetic field inside, thereby reducing the level of unnecessary radiation to the outside.
［発明が解決しようとする問題点コ
従来の不要輻射防止装置は、磁気遮蔽板で不要輻射発生
源をとり囲む構成としているので、表示装置の構造上に
大きな制約をうけるばかりでなく、装置の放熱が悪くな
るという問題点があり。[Problems to be Solved by the Invention] Conventional unnecessary radiation prevention devices have a structure in which a magnetic shielding plate surrounds the source of unnecessary radiation, which not only imposes large restrictions on the structure of the display device, but also There is a problem with poor heat dissipation.
さらにコスト高になるという問題点があった。Furthermore, there was a problem in that the cost was high.
この発明は上記のような問題点を解消するためになされ
たもので、磁気遮蔽板で囲むことなく、不要輻射レベル
の低い偏向ヨークを得ることを目的とする。This invention was made to solve the above-mentioned problems, and aims to obtain a deflection yoke with a low level of unnecessary radiation without surrounding it with a magnetic shielding plate.
［問題点を解決するための手段］
この発明は、水平偏向コイルの前後のわたり線部から発
生する漏れ磁界を打ち消す打消コイルと、この打消コイ
ルに流れる水平偏向電流を調節する通電量調節装置とを
備えたものである。[Means for Solving the Problems] The present invention includes a canceling coil that cancels the leakage magnetic field generated from the front and rear crossing wire portions of the horizontal deflection coil, and an energization amount adjustment device that adjusts the horizontal deflection current flowing through the canceling coil. It is equipped with the following.
［作用］
偏向ヨークの水平偏向コイルから発生する漏れ磁界を、
打消コイルが発生する漏れ磁界で打ち消すので、不要輻
射レベルを低減することができる。[Function] The leakage magnetic field generated from the horizontal deflection coil of the deflection yoke is
Since it is canceled by the leakage magnetic field generated by the cancellation coil, the level of unnecessary radiation can be reduced.
また、偏向ヨークごとに漏れ磁界の強さが相違するのを
、通電量調節装置によって打消コイルへの通電量を最適
値に調節することにより、それぞれ過不足なく打ち消す
ことができる。In addition, the difference in the strength of the leakage magnetic field for each deflection yoke can be canceled out in just the right amount by adjusting the amount of current to the cancellation coil to an optimum value using the current amount adjustment device.
［発明の実施例］
第１図はこの発明の一実施例の回路図で、（７）は水平
偏向コイル（ｌｂ）と直列に接続されている打消コイル
、（８）は打消コイル（７）に並列に接続されている通
電量調節装置であって、この実施例ではインダクタンス
可変コイルで、打消コイル（７）の通電量を調節するた
めのものである。[Embodiment of the Invention] Fig. 1 is a circuit diagram of an embodiment of the present invention, in which (7) is a cancellation coil connected in series with the horizontal deflection coil (lb), and (8) is a cancellation coil (7). The energization amount adjustment device is connected in parallel to the canceling coil (7), and is a variable inductance coil in this embodiment, and is for adjusting the energization amount of the cancellation coil (7).
第２図はこの発明による偏向ヨークの一例を示す要部の
概略側面図で、セパレータと垂直偏向コイルとを除去し
て示したものである。打消コイル（７）は水平偏向コイ
ル（１ｂ）の３〜ｌＯ％の巻数で、水平偏向コイル（１
ｂ）とほぼ相似形のくら形に巻回され、水平偏向コイル
（１ｂ）の前後のわたり線部（ｌｃ） 、 （ｌｄ）に
それぞれ沿う形状に形成されているコイル辺（７ａ）
、 （７ｂ）を有し、このコイル辺（７ａ） 、 （７
ｂ）は、わたり線部（ｌｃ） 、 （ｌｄ）に沿って延
在するとともに、軸線と平行なコイル辺（７Ｃ）は、コ
ア（１ａ）の外面に沿って軸方向に延在する姿勢で固定
され、水平偏向電流を通電したとき１図中に破線の矢印
で示した方向の漏れ磁界（９ａ） 、 （！３ｂ）を発
生し、水平偏向コイルのわたり線部（ｌｃ） 。FIG. 2 is a schematic side view of essential parts of an example of a deflection yoke according to the present invention, with the separator and vertical deflection coil removed. The cancellation coil (7) has a winding number of 3 to 10% of the horizontal deflection coil (1b).
A coil side (7a) is wound in a hollow shape that is almost similar to b) and is formed in a shape that follows the front and rear crossover portions (lc) and (ld) of the horizontal deflection coil (1b), respectively.
, (7b), and this coil side (7a) , (7
b) extends along the crossover lines (lc) and (ld), and the coil side (7C) parallel to the axis extends in the axial direction along the outer surface of the core (1a). When the coil is fixed and a horizontal deflection current is applied, a leakage magnetic field (9a), (!3b) is generated in the direction shown by the dashed arrow in Fig. 1, and the crossing wire portion (lc) of the horizontal deflection coil.
（１ｄ）から発生する漏れ磁界（８ａ） 、 （６ｂ）
をそれぞれ打ち消すように作用する。Leakage magnetic field (8a), (6b) generated from (1d)
act to cancel each other.
可変コイル（８）は、例えば第３図に示すようにボビン
（１０）にコイル（１１）を巻回し、ボビン（ｌＯ）内
の可動コア（１２）でインダクタンスを増減させる構成
としたもので、打消コイル（７）の巻数を少し多口に設
定しておき、偏向ヨーク（１）の漏れ磁界（６ａ） 、
（ｓｂ）の強さのばらつきに応じて打消コイル（７）
への通電量を調節し、不要輻射レベルが最小となるよう
に漏れ磁界（８ａ） 、 （９ｂ）の強さを調整するも
のである。なお、 （１３）は外部コアである。The variable coil (8) has a structure in which a coil (11) is wound around a bobbin (10) and the inductance is increased or decreased by a movable core (12) inside the bobbin (10), as shown in FIG. 3, for example. The number of turns of the cancellation coil (7) is set to a slightly larger number to reduce the leakage magnetic field (6a) of the deflection yoke (1),
(sb) depending on the variation in strength of the canceling coil (7)
The intensity of the leakage magnetic fields (8a) and (9b) is adjusted so that the unnecessary radiation level is minimized. Note that (13) is an external core.
このように、可変コイル（８）を設けると、打消コイル
（７）の巻数を変えることなく簡易に不要輻射レベルを
最小値に調整することができ、この実施例では偏向ヨー
ク（１）からの不要輻射レベルを７〜８ｄｂ低下させる
ことができた。In this way, by providing the variable coil (8), the unnecessary radiation level can be easily adjusted to the minimum value without changing the number of turns of the cancellation coil (7). We were able to reduce the unnecessary radiation level by 7 to 8 db.
なお、可変コイル（８）を第３図のようなポット形コア
を用いて構成したものでは、コイル（１１）からのもれ
磁界が外部コア（１３）でしゃ断されるので新らたな不
要輻射源となるおそれがない。In addition, when the variable coil (8) is configured using a pot-shaped core as shown in Fig. 3, the leakage magnetic field from the coil (11) is blocked by the external core (13), so no new unnecessary There is no risk of becoming a radiation source.
第４図はこの発明の他の実施例の回路図で、打消コイル
（７）と可変コイル（８）との直列体を、水平偏向コイ
ル（１ｂ）に並列接続としたもので、可変コイル（８）
のインダクタンスを増減することにより、打消コイル（
７）の通電量を増減することができる。FIG. 4 is a circuit diagram of another embodiment of the present invention, in which a series body of a cancellation coil (7) and a variable coil (8) is connected in parallel to a horizontal deflection coil (1b), and a variable coil ( 8)
By increasing or decreasing the inductance of the canceling coil (
7) The amount of current applied can be increased or decreased.
上記実施例では、打消コイル（７）をくら形に成形した
例を示したが、この形状に限られるものではない。In the above embodiment, an example was shown in which the canceling coil (7) was formed into a hollow shape, but the shape is not limited to this.
また、通電量ＷＪｆ！ｉ装置（８）をインダクタンス可
変コイルで構成した例を示したが、この構成に限られる
ものではなく、水平偏向コイルへの通電量および水平偏
向電流波形に悪影響を及ぼすことのない全ての調節手段
が含まれる。Also, the amount of current WJf! Although an example in which the i-device (8) is configured with a variable inductance coil is shown, the configuration is not limited to this, and any adjustment means that does not adversely affect the amount of current to the horizontal deflection coil and the horizontal deflection current waveform is shown. is included.
［発明の効果］
この発明は、偏向コイルの水平偏向コイルから発生する
漏れ磁界を打ち消す打消コイルと、この打消コイルへの
通１！量を規制する通電量調整装置とを備えたので、偏
向ヨーク自体の不要輻射レベルを低減できる効果が得ら
れる。[Effects of the Invention] The present invention provides a canceling coil that cancels the leakage magnetic field generated from the horizontal deflection coil of the deflection coil, and a connection to the canceling coil! Since the deflection yoke is provided with an energization amount adjustment device that regulates the amount of energization, an effect of reducing the unnecessary radiation level of the deflection yoke itself can be obtained.
第１図はこの発明の一実施例の回路図、第２図はこの発
明による偏向ヨークの一例を示す要部の概略側面図、第
３図は通電量調節装置の一例を示す斜視図、第４図はこ
の発明の他の実施例の回路図、第５図（ａ）はセパレー
タと垂直偏向コイルとを除去して示す偏向ヨークの側面
図、同図（ｂ）は遍れ磁界を説明するための水平偏向コ
イルの正面図、第６図は従来の不要輻射防止装置を備え
た陰極線管表示装置の一部分解斜視図である。
（１）・・・偏向ヨーク、（ｌｂ）・・・水平偏向コイ
ル、（８ａ） 、 （６ｂ） 、 （９ａ） 、 （９
ｂ）−・＝漏れ磁界、（７） −・・打消コイル、（８
）・・・通電量調節装置。
なお、図中、同一符号はそれぞれ同一、または相当部分
を示す。FIG. 1 is a circuit diagram of an embodiment of the present invention, FIG. 2 is a schematic side view of essential parts showing an example of a deflection yoke according to the invention, FIG. 3 is a perspective view showing an example of an energization amount adjusting device, and FIG. Fig. 4 is a circuit diagram of another embodiment of the present invention, Fig. 5(a) is a side view of the deflection yoke with the separator and vertical deflection coil removed, and Fig. 5(b) explains the bias magnetic field. FIG. 6 is a partially exploded perspective view of a cathode ray tube display device equipped with a conventional unnecessary radiation prevention device. (1) Deflection yoke, (lb) Horizontal deflection coil, (8a), (6b), (9a), (9
b) -... = leakage magnetic field, (7) -... canceling coil, (8
)...Electrification amount adjustment device. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.
Claims (3)
流の通電で上記水平偏向コイルから発生する漏れ磁界を
打ち消す逆極性の漏れ磁界を発生する打消コイルと、こ
の打消コイルの通電量を所望値に設定する通電量調節装
置とを備えた偏向ヨーク。(1) A canceling coil that is disposed near the horizontal deflection coil and generates a leakage magnetic field of opposite polarity that cancels the leakage magnetic field generated from the horizontal deflection coil by applying a horizontal deflection current, and the desired amount of current to the canceling coil. A deflection yoke equipped with an energization amount adjustment device to set a value.
ルの前後のわたり線部にそれぞれ沿う形状に形成されて
おり、かつ、当該打消コイルの２つのコイル辺がそれぞ
れ水平偏向コイルの前後のわたり線部に沿つて延在する
ように配設されてなる特許請求の範囲第１項記載の偏向
ヨーク。(2) The front and rear two coil sides of the cancellation coil are formed in a shape that respectively follows the front and rear crossing lines of the horizontal deflection coil, and the two coil sides of the cancellation coil respectively follow the front and rear crossing lines of the horizontal deflection coil. The deflection yoke according to claim 1, wherein the deflection yoke is arranged so as to extend along the line portion.
ある特許請求の範囲第１項記載の偏向ヨーク。(3) The deflection yoke according to claim 1, wherein the energization amount adjusting device is a variable inductance coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22429985A JPS6282633A (en) | 1985-10-08 | 1985-10-08 | Deflection yoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22429985A JPS6282633A (en) | 1985-10-08 | 1985-10-08 | Deflection yoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6282633A true JPS6282633A (en) | 1987-04-16 |
Family
ID=16811594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22429985A Pending JPS6282633A (en) | 1985-10-08 | 1985-10-08 | Deflection yoke |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6282633A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62100935A (en) * | 1985-10-25 | 1987-05-11 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Image display device |
| JPS62223952A (en) * | 1986-03-07 | 1987-10-01 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Method and apparatus for reducing straying magnetic field |
| EP0291121A1 (en) * | 1987-05-11 | 1988-11-17 | Koninklijke Philips Electronics N.V. | Picture display device with stray field compensation means |
| US4933596A (en) * | 1987-12-29 | 1990-06-12 | Sony Corporation | Deflection yoke with compensation for misconvergence by the horizontal center raster |
| JPH04132148A (en) * | 1989-12-23 | 1992-05-06 | Samsung Electron Devices Co Ltd | Deflecting yoke |
| US5594615A (en) * | 1993-05-10 | 1997-01-14 | Mti, Inc. | Method and apparatus for reducing the intensity of magenetic field emissions from display device |
-
1985
- 1985-10-08 JP JP22429985A patent/JPS6282633A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62100935A (en) * | 1985-10-25 | 1987-05-11 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Image display device |
| JPS62223952A (en) * | 1986-03-07 | 1987-10-01 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Method and apparatus for reducing straying magnetic field |
| JP2563917B2 (en) * | 1986-03-07 | 1996-12-18 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Cathode ray tube device |
| EP0291121A1 (en) * | 1987-05-11 | 1988-11-17 | Koninklijke Philips Electronics N.V. | Picture display device with stray field compensation means |
| US4933596A (en) * | 1987-12-29 | 1990-06-12 | Sony Corporation | Deflection yoke with compensation for misconvergence by the horizontal center raster |
| JPH04132148A (en) * | 1989-12-23 | 1992-05-06 | Samsung Electron Devices Co Ltd | Deflecting yoke |
| US5594615A (en) * | 1993-05-10 | 1997-01-14 | Mti, Inc. | Method and apparatus for reducing the intensity of magenetic field emissions from display device |
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