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
Links
- 230000002452 interceptive effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Description
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)
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.
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)
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)
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 |
-
1984
- 1984-10-31 JP JP16551484U patent/JPS6181269U/ja active Pending
Patent Citations (3)
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)
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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