JPS6264024A - Unnecessary radiation preventer - Google Patents
Unnecessary radiation preventerInfo
- Publication number
- JPS6264024A JPS6264024A JP60203779A JP20377985A JPS6264024A JP S6264024 A JPS6264024 A JP S6264024A JP 60203779 A JP60203779 A JP 60203779A JP 20377985 A JP20377985 A JP 20377985A JP S6264024 A JPS6264024 A JP S6264024A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- deflection coil
- magnetic field
- horizontal deflection
- unnecessary radiation
- 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
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)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、ＣＲＴ偏向ヨークから外部に輻射される有
害な不要信号を減衰させろようにした不要輻射防止装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an unnecessary radiation prevention device that is capable of attenuating harmful unnecessary signals radiated to the outside from a CRT deflection yoke.
不要輻射に関し、例えば西独のＶ Ｄ Ｅ （Ｖｅｒｂ
ａｎｄＤｅｕｔｓｃｈｅｒ Ｅｌｅｋｔｒｏｔｅｃｈｎ
ｉｋｅｒ）規格で要求される不要輻射規制周波数は、１
’０ＫＨｚ以上となっており、水平走査周波数の成分が
影響し、特に偏向ヨークからの漏れ磁界を抑制するため
に、従来は前記のヨークを金属などで囲って遮蔽を行っ
ていた。Regarding unnecessary radiation, for example, West Germany's VDE (Verb
andDeutscher Elektrotechn
The unnecessary radiation control frequency required by the Iker) standard is 1
The frequency is 0 KHz or more, and the horizontal scanning frequency component has an effect. In order to particularly suppress the leakage magnetic field from the deflection yoke, conventionally the yoke has been shielded by surrounding it with metal or the like.
第３図は、乙の従来の不要輻射防止装置を示すもので、
（１）は偏向ヨークで、ＣＲＴ＋２１に装着されており
、これを囲むように放熱板（３）および筐体（４）に金
属カバー（５）が取り付けられている。Figure 3 shows Party B's conventional unnecessary radiation prevention device.
A deflection yoke (1) is attached to the CRT+21, and a metal cover (5) is attached to a heat sink (3) and a housing (4) to surround it.
次に動作について説明する。第３図（ａ）において、水
平偏向コイル（１ｂ）に走査電流が流れると、第３図（
ｂ）に示すように磁界が発生し、これの大部分は、偏向
ヨーク（１）の内部空間とコア（１ａ）に磁力線が分布
する。しかし一部は、漏れ磁界（６）として、外部空間
に輻射する。この漏れ磁界（６）の外部輻射を防ぐため
に、金属カバー（５）により、この磁界を内部に閉じ込
め、外部漏れ磁界レベルを抑制する。Next, the operation will be explained. In FIG. 3(a), when a scanning current flows through the horizontal deflection coil (1b), as shown in FIG.
As shown in b), a magnetic field is generated, and most of the magnetic field lines are distributed in the internal space of the deflection yoke (1) and the core (1a). However, a part of it radiates into the external space as a leakage magnetic field (6). In order to prevent external radiation of this leakage magnetic field (6), the metal cover (5) confines this magnetic field inside and suppresses the level of the external leakage magnetic field.
従来の不要輻射防１１−装置は漏れ磁界を物理的に閉じ
込めることにより外部輻射を抑制していたので、構造設
計」−に大きな制約を受は放熱、又コストなどに問題点
があった。Conventional unnecessary radiation prevention devices have suppressed external radiation by physically confining leaked magnetic fields, which has resulted in major constraints on structural design, problems with heat dissipation, and cost.
この発明は上記のような問題点を解消するｌ−めになさ
れたもので、漏れ磁界を電気的に抑制することにより、
構造設計に制約を受けることもなく、安価に構成できる
不要輻射防止装置を得る乙とを目的とする。This invention was made to solve the above-mentioned problems, and by electrically suppressing the leakage magnetic field,
The object of the present invention is to obtain an unnecessary radiation prevention device that can be constructed at low cost without being restricted by structural design.
この発明に係わる不要輻射防止装置は、偏向ヨークを構
成している水平偏向コイルに補助コイルとして直列に挿
入し、不要信号を抑制するものである。The unnecessary radiation prevention device according to the present invention suppresses unnecessary signals by inserting an auxiliary coil in series with a horizontal deflection coil constituting a deflection yoke.
乙の発明における補助コイル（４、走査周波数に対応し
て、偏向コイルの漏れ磁界に対して相殺する磁界を発生
ずるものである。The auxiliary coil (4) in the invention of B generates a magnetic field corresponding to the scanning frequency to offset the leakage magnetic field of the deflection coil.
以下、この発明の一実施例を図について説明する。第１
図において、（１０）は鞍形に巻回形成されｔ−補助コ
イルで、乙の補助コイノ＋（１０１はコア（Ｉａｌをは
さんで水平偏向コイル（１ｂ）に対応するコア（１ａ）
の外周壁面に取り付けられている。。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (10) is a t-auxiliary coil wound in a saddle shape, and (101 is a core (1a) that corresponds to the horizontal deflection coil (1b) across the core (Ial).
It is attached to the outer peripheral wall of the .
まｔ：この補助コイル（１０）は第２図に示すように水
平偏向コイル（］ｂ）に直列に接続されている。This auxiliary coil (10) is connected in series to the horizontal deflection coil (]b) as shown in FIG.
乙の」：うな構成において、水平偏向コイル（１ｂ）お
よびそれに直列接続されｔ二補助コイル（１０）に走査
電流を流すと、水平偏向コイル（１ｂ）は従来の場合と
同様に第３図（１））に示すような一定方向の磁界を発
生ずる。この磁界の有効成分はコア（１ａ）を囲む空間
に発生され、一部の磁界が漏れ磁界として外部空間に輻
射される。これに対して、補助コイル００）により発生
ずる磁界は、水平偏向コイル（１ｂ）の漏れ磁界と逆方
向に分布発生し、その漏れ磁界を打ち消すよう作用する
。乙の場合、コア（１ａ）を囲む空間磁界に対してはコ
ア（１ａ）により影響が極めて少なくなっており、外部
空間への不要信号レベルとしては大幅に低減される。In this configuration, when a scanning current is passed through the horizontal deflection coil (1b) and the two auxiliary coils (10) connected in series with it, the horizontal deflection coil (1b) becomes as shown in FIG. 1) Generates a magnetic field in a fixed direction as shown in (1). The effective component of this magnetic field is generated in the space surrounding the core (1a), and a part of the magnetic field is radiated to the external space as a leakage magnetic field. On the other hand, the magnetic field generated by the auxiliary coil 00) is distributed in the opposite direction to the leakage magnetic field of the horizontal deflection coil (1b), and acts to cancel the leakage magnetic field. In case B, the effect on the spatial magnetic field surrounding the core (1a) is extremely small due to the core (1a), and the unnecessary signal level to the external space is significantly reduced.
以上のよりに、この発明によれば、ＣＲＴ偏向コイルに
よる不要輻射信号が大幅に低減出来、走査周波数が高く
なって？）、補助コイルの巻き数を変えることにより、
容易に対応出来る。また従来のように漏れ磁界を物理的
に遮蔽する遮蔽カバー等も必要としないので、構造設計
上の制約もなく、安価に構成できろ利点がある。As described above, according to the present invention, unnecessary radiation signals caused by the CRT deflection coil can be significantly reduced, and the scanning frequency can be increased. ), by changing the number of turns of the auxiliary coil,
It can be easily handled. Further, unlike the conventional method, there is no need for a shielding cover to physically shield leakage magnetic fields, so there are no restrictions on structural design, and there is an advantage that the structure can be constructed at low cost.
第１図は、この発明の一実施例における不要輻射防止装
置の構成を示す図、第２図は、第１図の電気的接続を示
す回路図、第３図（ａ）〜（ｃ）は、従来の不要輻射防
止装置を示す図で、第３図（ａ）は従来の構成を、第３
図（＋３）は磁力線の分布を、第３図（Ｃ）（よ偏向ヨ
ークの側面をそれぞれ示す図である。
図において、（１）は偏向ヨーク、（１ａ）はコア、（
１ｂ）は水平偏向コイル、００）は補助コイルである。
なお、図中同一符号は同−又は相当部分を示す。FIG. 1 is a diagram showing the configuration of an unnecessary radiation prevention device in an embodiment of the present invention, FIG. 2 is a circuit diagram showing the electrical connections in FIG. 1, and FIGS. 3(a) to (c) are , is a diagram showing a conventional unnecessary radiation prevention device, and FIG. 3(a) shows the conventional configuration in the third
Figure (+3) shows the distribution of magnetic lines of force, and Figure 3 (C) shows the side surface of the deflection yoke. In the figure, (1) is the deflection yoke, (1a) is the core, (
1b) is a horizontal deflection coil, and 00) is an auxiliary coil. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (2)
磁界による不要輻射を防止するものにおいて、上記偏向
コイルの巻回位置に対応する上記ヨーク外壁面に上記偏
向コイルと直列に接続された補助コイルを設け、この補
助コイルの磁界により上記偏向コイルの漏れ磁界を打ち
消すようにしたことを特徴とする不要輻射防止装置。(1) In a device for preventing unnecessary radiation due to leakage magnetic field of a deflection coil wound around a CRT deflection yoke, an auxiliary device is connected in series with the deflection coil on the outer wall surface of the yoke corresponding to the winding position of the deflection coil. An unnecessary radiation prevention device characterized in that a coil is provided, and the leakage magnetic field of the deflection coil is canceled by the magnetic field of the auxiliary coil.
する特許請求の範囲第１項記載の不要輻射防止装置。(2) The unnecessary radiation prevention device according to claim 1, wherein the deflection coil is a horizontal deflection coil.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60203779A JPS6264024A (en) | 1985-09-13 | 1985-09-13 | Unnecessary radiation preventer |
| KR1019860004501A KR900001503B1 (en) | 1985-09-13 | 1986-06-05 | Radiation suppression device |
| US06/903,974 US4709220A (en) | 1985-09-13 | 1986-09-04 | Radiation suppression device |
| DE19863631023 DE3631023A1 (en) | 1985-09-13 | 1986-09-09 | DEVICE FOR SUPPRESSING UNWANTED RADIATION THROUGH A MAGNETIC STRANDING FIELD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60203779A JPS6264024A (en) | 1985-09-13 | 1985-09-13 | Unnecessary radiation preventer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6264024A true JPS6264024A (en) | 1987-03-20 |
| JPH0516133B2 JPH0516133B2 (en) | 1993-03-03 |
Family
ID=16479637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60203779A Granted JPS6264024A (en) | 1985-09-13 | 1985-09-13 | Unnecessary radiation preventer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6264024A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6326928A (en) * | 1986-07-18 | 1988-02-04 | Denki Onkyo Co Ltd | Deflection yoke device |
| JPH027334A (en) * | 1988-06-24 | 1990-01-11 | Victor Co Of Japan Ltd | Leakage flux reduction device |
| US5350973A (en) * | 1989-08-31 | 1994-09-27 | Kabushiki Kaisha Toshiba | Cathode-ray tube apparatus having a reduced leak of magnetic fluxes |
| US5430351A (en) * | 1992-04-09 | 1995-07-04 | Kabushiki Kaisha Toshiba | Cathode-ray tube apparatus with means for reducing leakage magnetic field |
| US5907214A (en) * | 1995-12-07 | 1999-05-25 | Hitachi, Ltd. | Deflection yoke with coils for reducing unwanted magnetic field radiation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5592263U (en) * | 1978-12-21 | 1980-06-26 | ||
| JPS59197198A (en) * | 1983-04-22 | 1984-11-08 | 株式会社トーキン | Magnetic shielding device |
-
1985
- 1985-09-13 JP JP60203779A patent/JPS6264024A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5592263U (en) * | 1978-12-21 | 1980-06-26 | ||
| JPS59197198A (en) * | 1983-04-22 | 1984-11-08 | 株式会社トーキン | Magnetic shielding device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6326928A (en) * | 1986-07-18 | 1988-02-04 | Denki Onkyo Co Ltd | Deflection yoke device |
| JPH027334A (en) * | 1988-06-24 | 1990-01-11 | Victor Co Of Japan Ltd | Leakage flux reduction device |
| US5350973A (en) * | 1989-08-31 | 1994-09-27 | Kabushiki Kaisha Toshiba | Cathode-ray tube apparatus having a reduced leak of magnetic fluxes |
| US5430351A (en) * | 1992-04-09 | 1995-07-04 | Kabushiki Kaisha Toshiba | Cathode-ray tube apparatus with means for reducing leakage magnetic field |
| US5907214A (en) * | 1995-12-07 | 1999-05-25 | Hitachi, Ltd. | Deflection yoke with coils for reducing unwanted magnetic field radiation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0516133B2 (en) | 1993-03-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |