JPS6181269U - - Google Patents

Info

Publication number
JPS6181269U
JPS6181269U JP16551484U JP16551484U JPS6181269U JP S6181269 U JPS6181269 U JP S6181269U JP 16551484 U JP16551484 U JP 16551484U JP 16551484 U JP16551484 U JP 16551484U JP S6181269 U JPS6181269 U JP S6181269U
Authority
JP
Japan
Prior art keywords
magnetic field
ray tube
cathode ray
coil
magnetically shielded
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
Application number
JP16551484U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP16551484U priority Critical patent/JPS6181269U/ja
Publication of JPS6181269U publication Critical patent/JPS6181269U/ja
Pending legal-status Critical Current

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Description

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

第１図は従来の磁気遮蔽装置の断面図、第２図
は本考案に係る磁気遮蔽装置の一例を示す断面図
、第３図は第２図Ａ−Ａの断面図、第４図は本考
案の他の実施例を示す断面図、第５図は第２図の
例においてコイルに対する電流の制御の一例を示
すブロツク図である。 主要図中符号の説明、１はブラウン管、１１は
ブラウン管の表示面、２はシールドケース、２１
はシールドケースの開口部、３は逆磁界発生用の
コイルである。 Fig. 1 is a sectional view of a conventional magnetic shielding device, Fig. 2 is a sectional view showing an example of a magnetic shielding device according to the present invention, Fig. 3 is a sectional view taken along Fig. 2 A-A, and Fig. 4 is a sectional view of the present invention. FIG. 5 is a cross-sectional view showing another embodiment of the invention, and FIG. 5 is a block diagram showing an example of controlling the current to the coil in the example of FIG. Explanation of the symbols in the main figures: 1 is a cathode ray tube, 11 is a display surface of a cathode ray tube, 2 is a shield case, 21
3 is an opening of the shield case, and 3 is a coil for generating a reverse magnetic field.

Claims (1)

【実用新案登録請求の範囲】 (1) ブラウン管の近傍に、該ブラウン管に干渉
する磁界に面して該干渉磁界に対し逆方向の磁界
を発生すべく通電される逆磁界発生用のコイルを
設け、該コイルに前記干渉磁界と同一又はそれに
近似した強さの逆磁界を発生させることを特徴と
するブラウン管における磁気遮蔽装置。 (2) ブラウン管がその表示面を磁気シールドケ
ースの開口部に面する状態で磁気シールドケース
に内蔵されている場合において、前記磁気シール
ドケースの開口部の内周部に逆磁界発生用のコイ
ルを設けた実用新案登録請求の範囲第１項に記載
のブラウン管における磁気遮蔽装置。[Claims for Utility Model Registration] (1) A coil for generating a reverse magnetic field is provided near the cathode ray tube, facing the magnetic field interfering with the cathode ray tube and energized to generate a magnetic field in the opposite direction to the interfering magnetic field. A magnetic shielding device for a cathode ray tube, characterized in that the coil generates a reverse magnetic field having a strength equal to or close to the interference magnetic field. (2) When a cathode ray tube is built into a magnetically shielded case with its display surface facing the opening of the magnetically shielded case, a coil for generating a reverse magnetic field is installed on the inner periphery of the opening of the magnetically shielded case. A magnetic shielding device for a cathode ray tube according to claim 1 of the claimed utility model registration.
JP16551484U 1984-10-31 1984-10-31 Pending JPS6181269U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16551484U JPS6181269U (en) 1984-10-31 1984-10-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16551484U JPS6181269U (en) 1984-10-31 1984-10-31

Publications (1)

Publication Number Publication Date
JPS6181269U true JPS6181269U (en) 1986-05-29

Family

ID=30723364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16551484U Pending JPS6181269U (en) 1984-10-31 1984-10-31

Country Status (1)

Country Link
JP (1) JPS6181269U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63503106A (en) * 1986-03-27 1988-11-10 アイシーエル　システムズ　アクチーボラグ A device that reduces the strength of the magnetic field around a cathode ray tube
JPH03232387A (en) * 1990-02-07 1991-10-16 Mitsubishi Electric Corp Color cathode ray tube display device
JPH03276970A (en) * 1989-09-07 1991-12-09 Hughes Aircraft Co Closed loop bucking field device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56107684A (en) * 1980-01-31 1981-08-26 Toshiba Corp Interfering magnetic field refusing device of television receiving set
JPS574874B2 (en) * 1975-03-28 1982-01-27
JPS58104591A (en) * 1981-12-16 1983-06-22 Furukawa Electric Co Ltd:The Interference magnetic field reducing method for cathode ray tube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS574874B2 (en) * 1975-03-28 1982-01-27
JPS56107684A (en) * 1980-01-31 1981-08-26 Toshiba Corp Interfering magnetic field refusing device of television receiving set
JPS58104591A (en) * 1981-12-16 1983-06-22 Furukawa Electric Co Ltd:The Interference magnetic field reducing method for cathode ray tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63503106A (en) * 1986-03-27 1988-11-10 アイシーエル　システムズ　アクチーボラグ A device that reduces the strength of the magnetic field around a cathode ray tube
JPH03276970A (en) * 1989-09-07 1991-12-09 Hughes Aircraft Co Closed loop bucking field device
JPH03232387A (en) * 1990-02-07 1991-10-16 Mitsubishi Electric Corp Color cathode ray tube display device

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