JPH0536740U - Cathode ray tube with magnetic shield - Google Patents
Cathode ray tube with magnetic shieldInfo
- Publication number
- JPH0536740U JPH0536740U JP9301791U JP9301791U JPH0536740U JP H0536740 U JPH0536740 U JP H0536740U JP 9301791 U JP9301791 U JP 9301791U JP 9301791 U JP9301791 U JP 9301791U JP H0536740 U JPH0536740 U JP H0536740U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic shield
- ray tube
- cathode ray
- shield material
- magnetic
- 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
- 239000000463 material Substances 0.000 claims abstract description 58
- 239000000853 adhesive Substances 0.000 claims abstract description 11
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims abstract description 8
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000696 magnetic material Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000010894 electron beam technology Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000009125 cardiac resynchronization therapy Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
(57)【要約】 （修正有）
【目的】 陰極線管のファンネル部に磁気シールド材を
貼り付けることにより磁気シールドを行なう陰極線管に
おいて、曲面である陰極線管のファンネル部に容易に密
着し、取付けが簡単で磁気シールド効果のある磁気シー
ルド材を備えた陰極線管を提供することを課題とする。
【構成】 陰極線管のファンネル部に貼り付ける磁気シ
ールド材が厚さ５〜１００μｍ、アスペクト比（最大厚
さと最大長さの比）１０〜１5,０００のフレーク状軟磁
性非晶質合金片２を２枚の２０〜５０μｍの厚さの導電
性フィルム１の間に、２００〜４００ｇ／ｍ2 接着剤３
を介して固着して成る単位磁気シールド材１０を複数層
粘着剤４を介して重ね合せ接着して構成されている。
(57) [Summary] (Modified) [Purpose] In a cathode ray tube that magnetically shields by attaching a magnetic shield material to the funnel portion of the cathode ray tube, it is easily attached to the curved funnel portion of the cathode ray tube. It is an object of the present invention to provide a cathode ray tube provided with a magnetic shield material having a simple magnetic shield effect. [Structure] The flaky soft magnetic amorphous alloy piece 2 having a thickness of 5 to 100 μm and an aspect ratio (ratio of maximum thickness to maximum length) of 10 to 15,000 is used as a magnetic shield material to be attached to the funnel portion of the cathode ray tube. Between the two conductive films 1 having a thickness of 20 to 50 μm, 200 to 400 g / m 2 adhesive 3
The unit magnetic shield material 10 formed by adhering to each other via the multi-layer adhesive 4 is laminated and adhered.
Description
【０００１】[0001]
本考案は、テレビジョン、モニタ、パーソナルコンピュータ等の画像表示装置 として使用される陰極線管（Cathode Ray Tube以下ＣＲＴと略す）の変色、揺れ 及びウィンドワイパ現象を防止するため磁気シールドを施した磁気シールド付き ＣＲＴに関する。 The present invention is a magnetic shield provided with a magnetic shield to prevent discoloration, shaking and wind wiper phenomenon of a cathode ray tube (CRT) used as an image display device for televisions, monitors, personal computers and the like. With CRT.
【０００２】[0002]
テレビジョン、モニタ、パーソナルコンピュータ等の画像表示装置（ディスプ レー）として広く使用されているＣＲＴは、電子銃から発射される電子線が蛍光 体に当り、蛍光体を発光させて画像を構成する。特に、カラーＣＲＴでは、３本 の電子線により、赤、緑、青の３原色の蛍光体を発光させてカラー画像を形成す る。 CRTs, which are widely used as image display devices (displays) for televisions, monitors, personal computers, etc., form an image by causing an electron beam emitted from an electron gun to hit a phosphor and causing the phosphor to emit light. In particular, in a color CRT, three electron beams cause phosphors of three primary colors of red, green, and blue to emit light to form a color image.
【０００３】 最近のカラーテレビ及びモニタは、従来の９０°偏向ＣＲＴから１１０°偏向 ＣＲＴへと移行することにより、大型・薄型化している。また、モニタはシャド ウマスクのドットピッチが狭くなり、高精度化してきている。このようなテレビ やモニタは外界の磁界に対して非常に敏感となり、僅かな磁界によって飛翔する 電子線の軌道を逸脱させるために、正常な画像を結ばない。すわなち、静磁界に おいては変色現象を惹起こし、交流磁界では画像揺れ現象やウィンドワイパ現象 を惹起している。Recent color televisions and monitors have become large and thin due to the shift from the conventional 90 ° deflection CRT to 110 ° deflection CRT. In addition, the dot pitch of the shadow mask of monitors is becoming narrower, and the accuracy is increasing. Such televisions and monitors are very sensitive to the external magnetic field, and a slight magnetic field deviates the trajectory of the electron beam that is flying, so that a normal image is not formed. That is, the static magnetic field causes a color change phenomenon, and the AC magnetic field causes an image shake phenomenon and a wind wiper phenomenon.
【０００４】 静磁界の発生原因としては、直流電流を使用している鉄道、ＮＭＲ（核磁気共 鳴）などに使用している磁石（常伝導磁石、超伝導磁石）、スピーカーや磁石ま たは直流電流を用いている電気機器がある。また、揺れの原因となる交流磁界の 発生源としては、送電線、トランス、ブースバー、交流ケーブル等がある。また 、ウィンドワイパ現象は交流磁界の影響ではあるが、２台以上のテレビやモニタ が隣接して配置されることにより互いに干渉するために起る。The cause of the static magnetic field is a railway using direct current, a magnet (normal conducting magnet, superconducting magnet) used for NMR (nuclear magnetic resonance), a speaker, a magnet, or the like. There are electric devices that use direct current. Sources of AC magnetic fields that cause shaking include power lines, transformers, booth bars, and AC cables. Although the wind wiper phenomenon is an effect of an AC magnetic field, it occurs because two or more TVs and monitors are placed next to each other and interfere with each other.
【０００５】 これらの交流磁界、静磁界の発生源が増大し、ＣＲＴが敏感化しているため、 ＣＲＴ、ディスプレイの製造業者は磁気シールド対策に対して従来より配慮して いる。その対策としては、ＣＲＴの内部に鉄などの磁性体を入れる内部シールド があるが、磁性材の配置箇所に制限があり画像トラブルの解消には至っていない 。また表示装置筺体とＣＲＴ外面との間に軟磁性体を配置する外部シールドがあ るが、構成上ＣＲＴからの距離が必要で開口面積が大きくなることと、筐体内の 配置の問題で長さを充分確保することが出来ず画像トラブルの解消には充分とは 云えない。更には、筐体の外側に磁性体を配置する方法があるが、開口面積が大 きくなり長さが大きくなるため高価格となるなどの問題がある。Since the sources of these alternating magnetic fields and static magnetic fields are increasing and the CRTs are becoming more sensitive, manufacturers of CRTs and displays have been paying attention to magnetic shield measures from the past. As a countermeasure, there is an internal shield that puts a magnetic material such as iron inside the CRT, but the location of the magnetic material is limited, and image troubles have not been resolved. In addition, there is an external shield that arranges a soft magnetic material between the display device housing and the outer surface of the CRT. However, due to the configuration, a distance from the CRT is required, and the opening area becomes large. However, it cannot be said to be sufficient to eliminate image troubles. Further, there is a method of arranging a magnetic material on the outside of the housing, but there is a problem that the opening area becomes large and the length becomes large, so that the cost becomes high.
【０００６】 そこで、本考案者らは、先に実願昭６３−７６８８７号で、ＣＲＴの偏向ヨー ク部及びアノード部を除くファンネル部外面に直接磁性体を貼り付ける方法を提 案した。この方法によれば、磁気シールド部材の配置が容易でかつ筐体が大型化 することも防止できるが、必要な磁気シールド性能を得るのに必要な厚さの磁性 体シートを曲面であるＣＲＴファンネル部に密着させて貼り付けることが困難で あると云う問題点がある。Therefore, the present inventors previously proposed in Japanese Patent Application No. 63-76887 a method of directly attaching a magnetic material to the outer surface of the funnel portion of the CRT except the deflection yoke portion and the anode portion. According to this method, the magnetic shield member can be easily arranged and the case can be prevented from becoming large, but the magnetic sheet having the thickness required to obtain the required magnetic shield performance is a curved CRT funnel. There is a problem in that it is difficult to attach the parts closely.
【０００７】[0007]
本考案は、従来実施され、提案されている磁気シールド付きＣＲＴの上述の欠 点、問題点にかんがみ、筐体が大型化することがなく、磁気シールド材の配置が 容易な先に本考案者らによって提案されたＣＲＴファンネル部に磁気シールド部 材を貼り付けることにより磁気シールドを行なうＣＲＴにおいて、曲面であるＣ ＲＴファンネル部の偏向ヨーク部およびアノード部を除く範囲全体に容易に密着 し、取付けの簡単な磁気シールド部材を備えたＣＲＴを提供することを課題とす る。 In consideration of the above-mentioned deficiencies and problems of the CRT with a magnetic shield which has been conventionally implemented and proposed, the present inventor can easily arrange the magnetic shield material without increasing the size of the housing. In a CRT that is magnetically shielded by attaching a magnetic shield material to the CRT funnel portion proposed by et al., The CRT funnel portion, which is a curved surface, can be easily adhered to and attached to the entire area excluding the deflection yoke portion and anode portion. An object of the present invention is to provide a CRT provided with the simple magnetic shield member of
【０００８】[0008]
本考案による磁気シールド付きＣＲＴは上記課題を解決するため、磁気シール ド材が、厚さ５〜１００μｍ、アスペクト比（最大厚さに対する最大長さの比） １０〜１５０００のフレーク状軟磁性非晶質合金片を、２枚の２０〜５０μｍの 厚さの導電性フィルムの間に、２００〜４００ｇ／ｍ2 接着剤層を介して固着し て成る単位磁気シールド材を複数層、粘着剤を介して重ね合せて接着して構成さ れたことを特徴とする。In order to solve the above problems, a CRT with a magnetic shield according to the present invention has a magnetic shield material with a thickness of 5 to 100 μm and an aspect ratio (ratio of maximum length to maximum thickness) of 10 to 15000 in a flake soft magnetic amorphous form. Unit magnetic shielding material consisting of two pieces of conductive alloy film having a thickness of 20 to 50 μm and 200 to 400 g / m 2 adhesive layer, and a plurality of unit magnetic shield materials, and an adhesive agent. It is characterized in that it is constructed by laminating and adhering.
【０００９】[0009]
本考案のＣＲＴの磁気シールド材は上記の如く、磁気シールド材を構成する各 単位磁気シールド材は２枚の薄い導電性フィルムの間にフレーク状の軟磁性非晶 質合金片を２００〜４００ｇ／ｍ2 接着剤層で固着して構成されているので充分 な可撓性を有し、この単位磁気シールド材を粘着剤層により重ね合せ接着するこ とにより、可撓性を失うことなく、所要の磁気シールド特性を得ることが可能で ある。The magnetic shield material of the CRT of the present invention is as described above, and each unit magnetic shield material constituting the magnetic shield material has a flaky soft magnetic amorphous alloy piece between 200 to 400 g / g between two thin conductive films. It has sufficient flexibility because it is firmly fixed by the m 2 adhesive layer, and the unit magnetic shield material is superposed and adhered by the adhesive layer so that the required flexibility is maintained. It is possible to obtain the magnetic shield characteristics of.
【００１０】 しかし、ＣＲＴのファンネル部外面の形状は、稜線部に丸みを有する概ね４角 すいと厚さの小さい４角柱とが結合された形状であるから、いかに可撓性を有す る材料であっても、１枚の磁気シールド材をそのまゝＣＲＴファンネル部に密着 させて取付けることは不可能である。そこで、ＣＲＴファンネル部の磁気シール ド材を貼り付けるべき領域を概ね縦・横の中心線により４分割し、その夫々の部 分毎にその形状に合せて裁断された磁気シールド材を粘着剤層を介して密着させ るのがよい。その場合隣接する部分の接合部からの磁束漏洩を防止するため隣接 部で両側の磁気シールド材を１０〜５０mmオーバラップさせることが望ましい。However, the shape of the outer surface of the funnel portion of the CRT is a shape in which a generally square corner having a rounded ridge and a square pillar having a small thickness are combined, so that how flexible the material is However, it is not possible to attach one magnetic shield material to the CRT funnel portion in close contact with it. Therefore, the area of the CRT funnel where the magnetic shield material is to be attached is divided into four parts by the longitudinal and horizontal centerlines, and the magnetic shield material cut into each shape according to its shape is applied to the adhesive layer. It is advisable to attach them closely via. In that case, it is desirable to overlap the magnetic shield materials on both sides of the adjacent portions by 10 to 50 mm in order to prevent leakage of magnetic flux from the adjacent portions.
【００１１】 これにより、電源のＯＮ、ＯＦＦ時の消磁の際における振動を軽減することが できる。また磁気シールド材がファンネル部全体に密着することにより、磁性材 で構成される磁気シールド空間に対し、正面部の開口面積を最小限とすることが でき、かつヨーク部まで配置するため内部シールド方式では配置の関係で難しい 磁気シールド材の長さを充分とることができ、電子ビームの飛翔空間を充分に覆 うことができ、磁気シールド効果の向上を計ることができる。With this, it is possible to reduce vibration during demagnetization when the power is turned on and off. In addition, since the magnetic shield material is in close contact with the entire funnel part, the opening area of the front part can be minimized with respect to the magnetic shield space composed of the magnetic material. Difficult to arrange due to the arrangement, the magnetic shield material can have a sufficient length, the flight space of the electron beam can be sufficiently covered, and the magnetic shield effect can be improved.
【００１２】[0012]
以下に、本考案の実施例を図面に基づいて詳細に説明する。 図１は本考案による磁気シールド材を構成する単位磁気シールド材の構成を示 す図である。単位磁気シールド材１０は、２枚の導電性フィルム１の間に、フレ ーク状軟磁性非晶質合金片の集合体２を接着剤３で固定し、サンドウィッチ状に 形成されている。導電性フィルム１は、アルミニウム、銅、ステンレスなどの非 磁性金属フィルムまたはケイ素鋼、鉄などの軟磁性金属フィルムが用いられるが 、可撓性の点から２０〜５０μｍ厚さのアルミニウム及び銅などのフィルムが望 ましい。非晶質合金片２は、厚さが５〜１００μｍ、アスペクト比が１０〜１5, ０００であり、２枚の導電性フィルム１の間に２００〜４００ｇ／ｍ2 が配され る。接着剤３はアクリル系、エポキシ系等種々のものが使用可能であるが、可撓 性を付与する点からは、ポリエチレン系のホットメルトタイプの接着剤が望まし い。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a view showing the structure of a unit magnetic shield material that constitutes the magnetic shield material according to the present invention. The unit magnetic shield material 10 is formed in a sandwich shape by fixing an aggregate 2 of flaky soft magnetic amorphous alloy pieces between two conductive films 1 with an adhesive 3. As the conductive film 1, a non-magnetic metal film such as aluminum, copper or stainless steel or a soft magnetic metal film such as silicon steel or iron is used, but from the viewpoint of flexibility, it is made of aluminum or copper having a thickness of 20 to 50 μm. I want a film. The amorphous alloy piece 2 has a thickness of 5 to 100 μm and an aspect ratio of 10 to 15,000, and 200 to 400 g / m 2 is arranged between the two conductive films 1. Although various adhesives such as acrylic and epoxy adhesives can be used, polyethylene-based hot melt adhesives are desirable from the viewpoint of imparting flexibility.
【００１３】 図２は、単位磁気シールド材１０を複数層重ねて、粘着剤４によって一体の磁 気シールド材を構成した状態を示す図である。単位磁気シールド材１０どうしは 粘着剤４で結合されているので可撓性が害されることはない。FIG. 2 is a view showing a state in which a plurality of unit magnetic shield materials 10 are stacked and the adhesive 4 forms an integral magnetic shield material. Since the unit magnetic shield materials 10 are bonded by the adhesive 4, the flexibility is not impaired.
【００１４】 図３、図４はＣＲＴ５の側面図及び背面図で、図中にハッチングを施した部分 、すなわちファンネル部の偏向ヨーク部６及びアノード部７を除外した範囲に磁 気シールド材８が貼付される。図より判るように、ファンネル部は、稜線部に丸 みを付した概ね４角すいと厚さの小さい４角柱とを結合した形状をしているので 、いかに可撓性のある磁気シールド材でも１枚のまゝではファンネル部に密着さ せて貼付けることはできない。3 and 4 are a side view and a rear view of the CRT 5, in which the magnetic shield material 8 is provided in a hatched portion, that is, in a range excluding the deflection yoke portion 6 and the anode portion 7 of the funnel portion. Attached. As can be seen from the figure, the funnel part has a shape in which a quadrangular ridge with a rounded ridge and a quadrangular prism with a small thickness are combined, so no matter how flexible the magnetic shield material is, It is not possible to attach one sheet by sticking it to the funnel.
【００１５】 そこで、磁気シールド材８を貼付ける領域を、図５に示す如く、偏向ヨーク部 ６、アノード部７を通る縦方向に延びる中心線及び高さを２分する横方向に延び る中心線によりＡ、Ｂ、Ｃ及びＤの４つの部分に分割し、高さの低い４角柱の角 の部分に相当する部分に磁気シールド材に切欠きを設けて各部分の形状に合せて 磁気シールド部材を裁断し、ＣＲＴファンネル部に貼り付けるようにすれば、可 撓性のある磁気シールド材は無理なく貼り付けることができる。好ましくは磁気 シールド材は４分割し、互いに接合させる。Therefore, as shown in FIG. 5, a region to which the magnetic shield material 8 is attached has a center line extending in the vertical direction passing through the deflection yoke portion 6 and the anode portion 7 and a center extending in the horizontal direction that bisects the height. The line is divided into four parts, A, B, C, and D, and a cutout is provided in the magnetic shield material at the part corresponding to the corner part of the low-height quadrangular prism to match the shape of each part. If the member is cut and attached to the CRT funnel portion, the magnetic shield material having flexibility can be attached without difficulty. Preferably, the magnetic shield material is divided into four and bonded to each other.
【００１６】 この場合、隣合った磁気シールド材の接合部からの磁束漏洩を防止するため、 隣接磁気シールド材をオーバラップするのがよい。図６に磁気シールド材のオー バラップ幅とシールド変化率の関係を実験結果に基づいて示す。この図より、オ ーバラップ幅が５０mm以上あれば両材料の結合を確実に行なうことができるが、 １０〜５０mmオーバラップさせれば充分磁束漏洩を防止することができることが 判る。好ましくは、各分割シールド材の寸法、形状はＣＲＴに貼付けた場合５０ mmオーバラップするように設計される。In this case, in order to prevent the magnetic flux from leaking from the joint between the adjacent magnetic shield materials, it is preferable to overlap the adjacent magnetic shield materials. Figure 6 shows the relationship between the overwrap width of the magnetic shield material and the shield change rate based on the experimental results. From this figure, it can be seen that if the overlap width is 50 mm or more, the two materials can be reliably joined, but if they overlap by 10 to 50 mm, the magnetic flux leakage can be sufficiently prevented. Preferably, the size and shape of each split shield material are designed so as to overlap by 50 mm when attached to a CRT.
【００１７】 一例として送電線下の１６インチモニタの画像ゆれ対策改善例を示す。モニタ に貼り付ける磁気シールド材は前述の如く４分割され、５０mmオーバラップする ように貼り付けられる。磁気シールド材を構成する非晶質合金は、Co68.8Fe4.2S i16B11の組成で、厚さ２０〜４０mm、アスペクト比１００〜５００のフレーク状 のものを用い、２枚の２５μｍ厚さのアルミニウムフィルムに、２５０ｇ／ｍ2 となるように分散し、ポリエチレンホットメルトタイプの接着剤で固定したもの を単位磁気シールド材とした。この単位磁気シールド材を、アクリル粘着剤によ って、非晶質合金の量が７５０ｇ／ｍ2 になるように３層接合して磁気シールド 材とした。この磁気シールド材は極めて可撓性が高く、ＣＲＴのファンネル部に 容易に密着させて貼付けることができた。磁気シールド材はファンネル部へ偏向 ヨークより５０mm離れた位置およびＣＲＴ前面より５０mm奥の位置迄配置した。 送電線下の磁界は４０ｍＧ発生しており、モニタ画面は大きな画像揺れ現象を起 していたが、この磁気シールド材貼り付けにより画像揺れは全くなくなった。こ れは、磁界大きさでみると、１０ｍＧ以下に相当していると云える。また、電源 ＯＮ、ＯＦＦ時の振動は全く聞かれなかった。As an example, an example of improving the image shake countermeasure of a 16-inch monitor under a power transmission line will be shown. The magnetic shield material attached to the monitor is divided into four parts as described above, and they are attached so that they overlap each other by 50 mm. The amorphous alloy composing the magnetic shield material has a composition of Co 68.8 Fe 4.2 Si 16 B 11 and has a flake shape with a thickness of 20 to 40 mm and an aspect ratio of 100 to 500. A unit magnetic shield material was obtained by dispersing the aluminum film at 250 g / m 2 and fixing it with a polyethylene hot melt type adhesive. This unit magnetic shield material was joined in three layers with an acrylic adhesive so that the amount of the amorphous alloy was 750 g / m 2 , to obtain a magnetic shield material. This magnetic shield material was extremely flexible, and could be easily adhered and stuck to the funnel portion of the CRT. The magnetic shield material was placed in the funnel portion up to a position 50 mm away from the deflection yoke and a position 50 mm deeper than the front of the CRT. A magnetic field of 40 mG was generated under the power transmission line, causing a large image shaking phenomenon on the monitor screen, but the image shaking did not occur at all due to the attachment of the magnetic shield material. It can be said that this corresponds to 10 mG or less in terms of the magnetic field magnitude. Also, no vibration was heard when the power was turned on and off.
【００１８】[0018]
以上の如く、本考案によれば、ＣＲＴファンネル部に磁気シールド材を容易に 密着させて貼付けることができ、筐体外部シールドを行なう必要がなく、筐体内 部でシールドすることが可能となり、かつ振動の発生も解消することができた。 As described above, according to the present invention, the magnetic shield material can be easily attached in close contact with the CRT funnel portion, and it is possible to shield the inside of the casing without the need for external shielding of the casing. Moreover, the occurrence of vibration could be eliminated.
【図１】本考案による磁気シールド材の単位磁気シール
ド材の構成を示す断面図である。FIG. 1 is a sectional view showing the structure of a unit magnetic shield material of a magnetic shield material according to the present invention.
【図２】本考案による磁気シールド材の構成を示す断面
図である。FIG. 2 is a sectional view showing a structure of a magnetic shield material according to the present invention.
【図３】磁気シールド材貼り付け範囲を示したＣＲＴの
側面図である。FIG. 3 is a side view of the CRT showing a magnetic shield material attachment range.
【図４】その背面図である。FIG. 4 is a rear view thereof.
【図５】磁気シールド材の分割状態を示すＣＲＴの背面
図である。FIG. 5 is a rear view of the CRT showing a divided state of the magnetic shield material.
【図６】磁気シールド材のオーバラップ幅とシールド変
化率との関係を示す曲線図である。FIG. 6 is a curve diagram showing a relationship between an overlap width of a magnetic shield material and a shield change rate.
１ 導電性フィルム ２ 非晶質合金片 ３ 接着剤 ４ 粘着剤 ５ ＣＲＴ ６ 偏向ヨーク部 ７ アノード部 ８ 磁気シールド材 １０ 単位磁気シールド材 1 Conductive Film 2 Amorphous Alloy Piece 3 Adhesive 4 Adhesive 5 CRT 6 Deflection Yoke 7 Anode 8 Magnetic Shielding Material 10 Unit Magnetic Shielding Material
Claims (2)
を除くファンネル部外面に磁気シールド材を貼り付けた
磁気シールド付き陰極線管において、 上記の磁気シールド材が、厚さ５〜１００μｍ、アスペ
クト比１０〜１５０００のフレーク状軟磁性非晶質合金
片を、２枚の２０〜５０μｍの厚さの導電性フィルムの
間に、２００〜４００ｇ／ｍ2 接着剤層を介して固着し
て成る単位磁気シールド材を複数層、粘着剤を介して重
ね合せ接着して構成されたことを特徴とする磁気シール
ド付き陰極線管。1. A cathode ray tube with a magnetic shield in which a magnetic shield material is attached to the outer surface of the funnel portion of the cathode ray tube except the deflection yoke portion and the anode portion, wherein the magnetic shield material has a thickness of 5 to 100 μm and an aspect ratio of 10 A unit magnetic shield in which flake-shaped soft magnetic amorphous alloy pieces of ˜15,000 are fixed between two conductive films having a thickness of 20 to 50 μm through an adhesive layer of 200 to 400 g / m 2. A cathode ray tube with a magnetic shield, comprising a plurality of layers, which are laminated and adhered via an adhesive.
は概ね縦・横の中心線により４分割され、その夫々の部
分毎にその形状に合せて裁断された磁気シールド材を、
隣接する各部の接合部を１０〜５０mmオーバラップさせ
て陰極線管に粘着剤層を介して密着させたことを特徴と
する請求項１に記載の磁気シールド付き陰極線管。2. A region to which the magnetic shield material is attached is divided into four parts by vertical and horizontal centerlines, and the magnetic shield material cut into parts according to its shape is divided into four parts.
The cathode ray tube with a magnetic shield according to claim 1, wherein the joint portions of adjacent portions are overlapped with each other by 10 to 50 mm and are adhered to the cathode ray tube via an adhesive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9301791U JPH0536740U (en) | 1991-10-18 | 1991-10-18 | Cathode ray tube with magnetic shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9301791U JPH0536740U (en) | 1991-10-18 | 1991-10-18 | Cathode ray tube with magnetic shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0536740U true JPH0536740U (en) | 1993-05-18 |
Family
ID=14070698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9301791U Pending JPH0536740U (en) | 1991-10-18 | 1991-10-18 | Cathode ray tube with magnetic shield |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0536740U (en) |
-
1991
- 1991-10-18 JP JP9301791U patent/JPH0536740U/en active Pending
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