JPH01303144A - Crt display device - Google Patents
Crt display deviceInfo
- Publication number
- JPH01303144A JPH01303144A JP63132740A JP13274088A JPH01303144A JP H01303144 A JPH01303144 A JP H01303144A JP 63132740 A JP63132740 A JP 63132740A JP 13274088 A JP13274088 A JP 13274088A JP H01303144 A JPH01303144 A JP H01303144A
- Authority
- JP
- Japan
- Prior art keywords
- display device
- crt
- magnetic
- front surface
- crt display
- 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
- 230000005291 magnetic effect Effects 0.000 claims abstract description 40
- 230000035699 permeability Effects 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012780 transparent material Substances 0.000 claims abstract description 6
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 5
- 229910000889 permalloy Inorganic materials 0.000 claims abstract description 4
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 230000004907 flux Effects 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁場からCRTを磁気的に遮蔽する磁気シー
ルドに係り、特にNMRイメージング装置の一部として
使うCRTディスプレイ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 a magnetic shield for magnetically shielding a CRT from a magnetic field, and particularly to a CRT display device used as part of an NMR imaging device.
NMRイメージング装置に採用する磁場装置の漏洩磁場
は、かなりの強度で広範囲にまで広がっており、近傍に
ある電子機器等に影響を与える。The leakage magnetic field of the magnetic field device employed in the NMR imaging apparatus is quite strong and spreads over a wide range, and affects nearby electronic equipment.
特に、CRTにおける磁場の影響は、字ぶれや色ずれと
なってあられれる。最近、ニッケイ、エレクトロニクス
1987.1.12 (Nα412)第173頁から第
184頁に記載されているように、CRTディスプレイ
側面をパーマロイで覆い、磁場の影響をおさえる工夫も
されているが、CRT前面の磁気シールドを考慮したC
RTディスプレイ装置は今だ開発されていない。In particular, the influence of the magnetic field on a CRT can result in blurred text and color shifts. Recently, as described in Nikkei Electronics, January 12, 1987 (Nα412), pages 173 to 184, efforts have been made to cover the sides of CRT displays with permalloy to suppress the effects of magnetic fields; C considering the magnetic shielding of
RT display devices have not yet been developed.
上記従来技術は、CRTディスプレイ装置前面の磁気シ
ールドの点について考慮されておらず、かなりの字ぶれ
や色ずれが生じるという問題があった。本発明の目的は
、CRT前面における磁場の影響を遮蔽することにある
。The above-mentioned conventional technology does not take into consideration the magnetic shielding of the front surface of the CRT display device, and has the problem of considerable blurring and color shift. An object of the present invention is to shield the influence of magnetic fields on the front surface of a CRT.
上記目的は、高透磁率材料の繊維で作った網を透明材料
の保持体に保持させ、CRT前面に取り付けることによ
り達成される。The above object is achieved by holding a mesh made of fibers of a high magnetic permeability material in a holder made of a transparent material and attaching it to the front surface of a CRT.
本発明のCRTディスプレイ装置は、側面を高透率の磁
気シールド材が覆っており、さらに、前面にはメツシュ
状の磁気シールド材が使われている。そのため、磁気シ
ールド材によって、内部に侵入する磁束がかなり少なく
なるので、CRT上に起こる字ぶれや色ずれなどの影響
をおさえることができる。In the CRT display device of the present invention, the side surfaces are covered with a highly permeable magnetic shielding material, and the front surface is further provided with a mesh-like magnetic shielding material. Therefore, the magnetic flux that enters the inside is considerably reduced by the magnetic shielding material, so that effects such as character blurring and color shift that occur on the CRT can be suppressed.
以下、本発明の一実施例を第1図により説明する。従来
のCRTディスプレイ装置(第2図)は。An embodiment of the present invention will be described below with reference to FIG. A conventional CRT display device (Fig. 2).
側面(3)をプラスチック製のケースが覆い、前面には
、CRT (4)の前面がそのままあられれていた。本
発明のCRTディスプレイ装置(第1図)は、側面(1
)を透磁率の高い強磁性材料でつくったケースが覆い、
前面には、繊維状の高透磁率材料で作った綱を保持させ
た透明材料の保持体(2)が取り付けである。また、こ
こで側面と前面の磁気シールドは磁気回路的に接合され
ている。高透磁率の材料としては、パーマロイ、鉄系ア
モルファス合金等を利用する。本実施例によれば、CR
Tディスプレイ装置内部に侵入する磁束を、側面の高透
磁率系材料及び前面のメツシュ状の高透磁率材料によっ
ておさえることができる。A plastic case covered the sides (3), and the front of the CRT (4) was exposed on the front. The CRT display device (FIG. 1) of the present invention has a side surface (1
) is covered by a case made of a ferromagnetic material with high magnetic permeability.
Attached to the front is a holder (2) made of a transparent material that holds a rope made of a fibrous material with high magnetic permeability. Furthermore, the side and front magnetic shields are connected in a magnetic circuit. As the material with high magnetic permeability, permalloy, iron-based amorphous alloy, etc. are used. According to this embodiment, CR
The magnetic flux penetrating into the T display device can be suppressed by the high magnetic permeability material on the side surfaces and the mesh-like high magnetic permeability material on the front surface.
本発明によれば、CRTに及ぼす磁場を効率よく遮蔽す
ることができるので、大きな漏洩磁場を発生する磁石の
近傍にCRTディスプレイ装置を設置できる効果がある
。According to the present invention, since the magnetic field exerted on the CRT can be efficiently shielded, the CRT display device can be installed near a magnet that generates a large leakage magnetic field.
第1図は本発明の一実施例のCRTディスプレイ装置の
外観図、第2図は従来技術によるCRTディスプレイ装
置の外観図である。
1・・・高透磁率材料製のケース、2・・・繊維状の高
透磁率材料で作った綱を保持させた透明材料の保持体、
3・・・プラスチック製のケース、4・・CRT前面。
第1図
第2図FIG. 1 is an external view of a CRT display device according to an embodiment of the present invention, and FIG. 2 is an external view of a CRT display device according to the prior art. 1... A case made of a high magnetic permeability material, 2... A holder made of a transparent material holding a rope made of a fibrous high magnetic permeability material,
3...Plastic case, 4...CRT front. Figure 1 Figure 2
Claims (1)
て、周囲を透磁率の高い強磁性材料で囲い、さらに、繊
維状の透磁率の高い強磁性材料で作つた網を透明材料の
平面状保持体に保持させ、前面に取り付けたことを特徴
とするCRTディスプレイ装置。 2、第1項記載のCRTディスプレイ装置において、前
面の網を黒色に着色したことを特徴とするCRTディス
プレイ装置。 3、第1項記載のCRTディスプレイ装置において、透
磁率の高い強磁性材料をパーマロイ材料または、鉄系ア
モルファス合金とすることを特徴とするCRTディスプ
レイ装置。4、第1項記載の磁気シールド構造において
、側面と前面の磁気シールドが、磁気回路的に接合して
いることを特徴とするCRTディスプレイ装置。[Claims] 1. In a display device that displays images on a CRT, the periphery is surrounded by a ferromagnetic material with high magnetic permeability, and a net made of a fibrous ferromagnetic material with high magnetic permeability is made of a transparent material. A CRT display device, characterized in that it is held by a flat holder and attached to the front surface. 2. The CRT display device according to item 1, wherein the front screen is colored black. 3. The CRT display device according to item 1, wherein the ferromagnetic material with high magnetic permeability is a permalloy material or an iron-based amorphous alloy. 4. A CRT display device characterized in that in the magnetic shield structure described in item 1, the side and front magnetic shields are connected in a magnetic circuit manner.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63132740A JPH01303144A (en) | 1988-06-01 | 1988-06-01 | Crt display device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63132740A JPH01303144A (en) | 1988-06-01 | 1988-06-01 | Crt display device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01303144A true JPH01303144A (en) | 1989-12-07 |
Family
ID=15088487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63132740A Pending JPH01303144A (en) | 1988-06-01 | 1988-06-01 | Crt display device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01303144A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03106192A (en) * | 1989-09-20 | 1991-05-02 | Hitachi Ltd | Prevention device for color blurring and moving display of crt due to external dc magnetic field |
JPH04312446A (en) * | 1991-02-04 | 1992-11-04 | Univ California | Real-time mr imaged system located at interior of gantry chamber and method therefor |
JPH09508049A (en) * | 1994-11-24 | 1997-08-19 | フィリップス エレクトロニクス エヌ ベー | Magnetic resonance apparatus including X-ray apparatus |
JP2009011477A (en) * | 2007-07-03 | 2009-01-22 | Hitachi Medical Corp | Magnetic resonance imaging apparatus |
-
1988
- 1988-06-01 JP JP63132740A patent/JPH01303144A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03106192A (en) * | 1989-09-20 | 1991-05-02 | Hitachi Ltd | Prevention device for color blurring and moving display of crt due to external dc magnetic field |
JPH04312446A (en) * | 1991-02-04 | 1992-11-04 | Univ California | Real-time mr imaged system located at interior of gantry chamber and method therefor |
JPH09508049A (en) * | 1994-11-24 | 1997-08-19 | フィリップス エレクトロニクス エヌ ベー | Magnetic resonance apparatus including X-ray apparatus |
JP2009011477A (en) * | 2007-07-03 | 2009-01-22 | Hitachi Medical Corp | Magnetic resonance imaging apparatus |
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