JPS61151955A - Electromagnetic shielding body of cathode-ray tube - Google Patents
Electromagnetic shielding body of cathode-ray tubeInfo
- Publication number
- JPS61151955A JPS61151955A JP27211384A JP27211384A JPS61151955A JP S61151955 A JPS61151955 A JP S61151955A JP 27211384 A JP27211384 A JP 27211384A JP 27211384 A JP27211384 A JP 27211384A JP S61151955 A JPS61151955 A JP S61151955A
- Authority
- JP
- Japan
- Prior art keywords
- transparent conductive
- conductive film
- transparent
- ray tube
- plate
- 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
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000012790 adhesive layer Substances 0.000 claims description 4
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 7
- 239000011347 resin Substances 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 abstract 2
- 239000004925 Acrylic resin Substances 0.000 abstract 1
- 229920000178 Acrylic resin Polymers 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 abstract 1
- 239000004926 polymethyl methacrylate Substances 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000002500 effect on skin Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 238000005299 abrasion 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
- 239000011521 glass Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
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
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/867—Means associated with the outside of the vessel for shielding, e.g. magnetic shields
- H01J29/868—Screens covering the input or output face of the vessel, e.g. transparent anti-static coatings, X-ray absorbing layers
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
−の
この発明は、オフィス機器のディスプレイやテレビの陰
極線管（ＣＲＴ、ブラウン管）に取付けて陰極線管から
発生する電磁波を遮へいするのに用いて最適な電！ｉ″
ｍへい体に関する。DETAILED DESCRIPTION OF THE INVENTION - This invention is an ideal electric device that can be attached to the display of office equipment or the cathode ray tube (CRT, cathode ray tube) of a television to shield electromagnetic waves generated from the cathode ray tube. i″
Concerning the body.
１１１口１１
陰極線管から発生ずる電磁波は周辺の機器に障害を与え
るばかりでなく、人体に有害である。これまでに、陰極
線管から発生する電磁波を遮へいするために、多くの遮
へい物が考えられ、一部は試作から実用段階にある。111 Exit 11 Electromagnetic waves emitted from cathode ray tubes not only cause damage to surrounding equipment, but are also harmful to the human body. To date, many shields have been devised to shield the electromagnetic waves generated by cathode ray tubes, and some are in the prototype stage or in the practical stage.
しかしながら、従来の遮へい物は、価格が高く一般への
普及が難しく、映像面が暗くなったりなどして明瞭に映
像面を見れないという問題があった。However, conventional shields are expensive and difficult to spread to the general public, and there are problems in that the image surface becomes dark and cannot be seen clearly.
発Ｊ［ｎ月」１
この発明は、上述した問題点を解決するためになされた
ものであり、構造が簡単でコスト低減化が図れ、映像面
を明瞭に見ることができる陰極線管の電磁遮へい体を提
供することを目的とする。This invention was made to solve the above-mentioned problems, and provides an electromagnetic shield for cathode ray tubes that has a simple structure, reduces costs, and allows a clear image to be seen. The purpose is to provide the body.
１１へ１１
したがって、この目的を達成づるために、この発明は電
極線管の映像面の近傍に配置されて陰極線管より発生す
る電磁波を遮へいする陰極線管の電磁遮へい体において
、透光性の面板は映像面を覆う大きさを有し、この面板
の映像面に対面する面側には透明接着層を介して透明導
電フィルムが貼り付けられているとともに、この透明導
電フィルムに形成された透明導電膜はアースされており
、観察者に対面する面板の他方の面側はつや消し′処理
が施されていて、透明導電膜が酸化インジウム錫、イン
ジウム錫又はその均等物により形成されていることを特
徴とする陰極線管の電磁遮へい体を要旨としている。11 To 11 Therefore, in order to achieve this object, the present invention provides a light-transmitting face plate in an electromagnetic shield for a cathode ray tube that is placed near the image plane of the electrode ray tube to shield electromagnetic waves generated from the cathode ray tube. has a size that covers the image plane, and a transparent conductive film is attached to the side of the face plate facing the image plane via a transparent adhesive layer, and a transparent conductive film formed on this transparent conductive film The film is grounded, the other side of the face plate facing the viewer is treated with a matte finish, and the transparent conductive film is formed of indium tin oxide, indium tin, or their equivalents. The main subject is the electromagnetic shield for cathode ray tubes.
口 、を 決するための手
面板３の映像面２に対面する面側に、透明の接着剤層９
を介して透明導電フィルム５を貼り付け、その透明導電
膜８をアースし、しかも面板３の観察者側の面をつや消
し処理する。そして、透明導電膜８は、酸化インジウム
錫、インジウム錫又はその均等物により形成されている
。A transparent adhesive layer 9 is placed on the side of the hand plate 3 that faces the image surface 2 for determining the opening and opening.
A transparent conductive film 5 is pasted through the transparent conductive film 8, and the transparent conductive film 8 is grounded, and the surface of the face plate 3 facing the viewer is matted. The transparent conductive film 8 is made of indium tin oxide, indium tin, or an equivalent thereof.
映像面２から発生する電磁波を透明導電フィルム５によ
り遮へいするとともに、映像面２の輝度を下げずに外光
の反射を防ぐ。Electromagnetic waves generated from the image plane 2 are shielded by a transparent conductive film 5, and reflection of external light is prevented without lowering the brightness of the image plane 2.
ｉｉ
第１図は、陰極線管１の映像面２に対向して配置される
この発明の電磁遮へい体３を示している。ii FIG. 1 shows an electromagnetic shield 3 of the present invention placed opposite the image plane 2 of the cathode ray tube 1.
電磁遮へい休３は、第２図に示すように面板４と、この
面板４に貼り付けられた透明導電フィルム５を有する。The electromagnetic shield 3 has a face plate 4 and a transparent conductive film 5 attached to the face plate 4, as shown in FIG.
面板４は、透光性を有し、望ましくは透明のアクリル板
などの樹脂板やガラス板などからなり、たとえば２〜３
ＩｌｌＩｌの板厚がある。この面板４は映像面２を覆う
ことのできる大きさを有し、所定間隔だけ映像面２より
はなして対向配置しである。The face plate 4 has translucency and is preferably made of a resin plate such as a transparent acrylic plate, a glass plate, etc.
There is a plate thickness of IllIl. This face plate 4 has a size that can cover the image plane 2, and is placed facing away from the image plane 2 by a predetermined distance.
面板４は、映像面２の観察者に対面する面側が、つや消
し処理しである。すなわち、面板４の手前の面は微小な
凹凸６−が形成され、これにより、たとえば太陽光や室
内灯など外光を乱反射して、外光が観察者に反射するの
を防いで映像面を見やすいように配慮しである。The face plate 4 has a matte finish on the side facing the viewer of the image plane 2. That is, the front surface of the face plate 4 is formed with minute irregularities 6-, which diffusely reflect external light such as sunlight or indoor lights, prevent external light from being reflected to the viewer, and improve the image plane. Care has been taken to make it easy to see.
透明導電フィルム５は、透明フィルム基材７とこの透明
フィルム基材７に形成された透明導電１！＄８を有する
。The transparent conductive film 5 includes a transparent film base material 7 and a transparent conductive film 1 formed on the transparent film base material 7! Has $8.
この透明フィルム基材７は、面板４の映像面２に対面す
る面側に透明のたとえば感圧形の接着剤層９により貼り
付けである。透明導電フィルム５は、文字通り可視光に
透明でかつ導電性のあるフィルムである。This transparent film base material 7 is attached to the side of the face plate 4 facing the image plane 2 using a transparent adhesive layer 9, for example, a pressure-sensitive type. The transparent conductive film 5 is literally a film that is transparent to visible light and conductive.
透明フィルム基材７としては、たとえばポリエステルフ
ィルム（２軸延伸ポリエチレンテレフタレートフイルム
）が好ましい。ポリエステルフィルムを使用するのは、
透明性、表面平滑性、寸法安定性、耐熱性、耐薬品性、
機械的特性および価格の点で優れているからである。As the transparent film base material 7, for example, a polyester film (biaxially stretched polyethylene terephthalate film) is preferable. The use of polyester film is
Transparency, surface smoothness, dimensional stability, heat resistance, chemical resistance,
This is because it is superior in terms of mechanical properties and price.
透明導電膜８はアース線Ｅによりアースされており、透
明導電膜８としては、たとえばＩＴＯ（Ｉｎｄｉｕｍ
Ｔｉｎ ０ｘｉｄｅ：酸化インジウム錫）簿膜を蒸
着するのが好ましい。The transparent conductive film 8 is grounded by a ground wire E, and the transparent conductive film 8 is made of, for example, ITO (Indium
It is preferable to deposit a Tin Oxide (indium tin oxide) film.
この他に、透明導電膜８としては、抵抗値の小さいイン
ジウム錫又はその均等物の蒸着膜が採用できる。In addition, as the transparent conductive film 8, a vapor-deposited film of indium tin or its equivalent, which has a small resistance value, can be used.
このように、透明導電フィルム５は、透明フィルム基材
７の表面に導電性処理が施され、表面は導電性であるが
、透明フィルム基材７の厚さ方向には絶縁性である。In this way, the transparent conductive film 5 has the surface of the transparent film base material 7 subjected to conductive treatment, and the surface is conductive, but the transparent film base material 7 is insulating in the thickness direction.
なお、透明導電膜８の表面は、図示しないが透明の保護
層により被覆して、透明導電膜８の耐摩擦性を改善する
ようにしてもよい。Note that the surface of the transparent conductive film 8 may be covered with a transparent protective layer (not shown) to improve the abrasion resistance of the transparent conductive film 8.
ところで、この発明の電磁遮へい体３は電ｌａ遮へい理
論を応用したものである。By the way, the electromagnetic shielding body 3 of this invention applies the electromagnetic shielding theory.
すなわち、Ｎ離遠へいは電界および磁界が導体内部には
いらないという導体の表皮効果を利用したものである。In other words, the N distance field utilizes the skin effect of a conductor, in which no electric field or magnetic field is required inside the conductor.
表皮効果が十分に強ければ、電界、磁界は導体の内には
ほとんど入らない。If the skin effect is strong enough, almost no electric or magnetic fields will enter the conductor.
したがって、電磁遮へいは、磁界および電界の遮断に有
効であり、特に周波数の高い電磁波には、きわめて有効
である。Therefore, electromagnetic shielding is effective in blocking magnetic fields and electric fields, and is particularly effective in blocking high-frequency electromagnetic waves.
この発明の電磁遮へい体３は、オフィス機器やテレビの
陰極線管から出る電磁波の電磁遮へいに有効である。The electromagnetic shielding body 3 of the present invention is effective for electromagnetic shielding of electromagnetic waves emitted from office equipment and cathode ray tubes of televisions.
実際にこの発明の電磁遮へい体に関して、磁界波および
電界波の遮へい効果を測定したところ、従来品に比べて
良好な結果を得た。When the electromagnetic shield of the present invention was actually measured for its shielding effect against magnetic field waves and electric field waves, better results were obtained compared to conventional products.
なお、この発明の電磁遮へい休３は、図示例に限定され
ない。Note that the electromagnetic shield 3 of the present invention is not limited to the illustrated example.
１乱Ｌ１１
以上説明したことから明らかなように、陰極線管の映像
面から発生する電磁波を遮へいできることはもちろんの
こと、極めて簡単な構成であるので、大幅にコスト低減
が図れ、しかも反射や映像面の輝度の低下がなく映像面
を明瞭に見ることができる効果がある。 ；1 Disturbance L11 As is clear from the above explanation, it is possible to not only shield electromagnetic waves generated from the image plane of a cathode ray tube, but also because it has an extremely simple configuration, it is possible to significantly reduce costs, and it is also possible to shield electromagnetic waves generated from the image plane of the cathode ray tube. This has the effect that the image plane can be seen clearly without any reduction in brightness. ;
第１図は陰極線管に対向配置されるこの発明の電磁遮へ
い体の実施例を示す斜視図、第２図は電磁遮へい体の実
施例を示す断面図である。
１・・・陰極線管
２・・・映像面
３・・・電磁遮へい体
４・・・面板
５・・・透明導電フィルム
８・・・透明導電膜
第１図FIG. 1 is a perspective view showing an embodiment of the electromagnetic shield of the present invention, which is placed opposite to a cathode ray tube, and FIG. 2 is a sectional view showing an embodiment of the electromagnetic shield. 1... Cathode ray tube 2... Image plane 3... Electromagnetic shield 4... Face plate 5... Transparent conductive film 8... Transparent conductive film Figure 1
Claims (1)
へい体において、透光性の面板は映像面を覆う大きさを
有し、この面板の映像面に対面する面側には透明接着層
を介して透明導電フィルムが貼り付けられているととも
に、この透明導電フィルムに形成された透明導電膜はア
ースされており、観察者に対面する面板の他方の面側は
つや消し処理が施されていて、透明導電膜が酸化インジ
ウム錫、インジウム錫又はその均等物により形成されて
いることを特徴とする陰極線管の電磁遮へい体。[Scope of Claims] In an electromagnetic shield for a cathode ray tube that is placed near the image plane of the electrode ray tube and shields electromagnetic waves generated from the cathode ray tube, the translucent face plate has a size that covers the image plane. A transparent conductive film is attached to the side of the face plate facing the image plane via a transparent adhesive layer, and the transparent conductive film formed on this transparent conductive film is grounded, so that it is not visible to the viewer. An electromagnetic shield for a cathode ray tube, characterized in that the other side of the facing face plate is subjected to a matte treatment, and the transparent conductive film is formed of indium tin oxide, indium tin, or an equivalent thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27211384A JPS61151955A (en) | 1984-12-25 | 1984-12-25 | Electromagnetic shielding body of cathode-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27211384A JPS61151955A (en) | 1984-12-25 | 1984-12-25 | Electromagnetic shielding body of cathode-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61151955A true JPS61151955A (en) | 1986-07-10 |
Family
ID=17509261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27211384A Pending JPS61151955A (en) | 1984-12-25 | 1984-12-25 | Electromagnetic shielding body of cathode-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61151955A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01164991A (en) * | 1987-12-22 | 1989-06-29 | Mitsui Toatsu Chem Inc | Crt filter |
| JPH01307297A (en) * | 1988-06-04 | 1989-12-12 | Nitto Denko Corp | Static and electromagnetic wave shielding material |
| JPH02211493A (en) * | 1989-02-10 | 1990-08-22 | Nitto Denko Corp | Electromagnetic wave shield material for display |
| EP0454435A2 (en) * | 1990-04-24 | 1991-10-30 | Sharp Kabushiki Kaisha | Plain light source device |
| FR2690041A1 (en) * | 1992-04-14 | 1993-10-15 | Clausse Georges | Shielding frame against electromagnetic fields emitted by CRT - has medium image filter for visualisation screen composed of magnetically permeable material. |
| JPH10153964A (en) * | 1996-05-09 | 1998-06-09 | Sumitomo Chem Co Ltd | Display front panel |
-
1984
- 1984-12-25 JP JP27211384A patent/JPS61151955A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01164991A (en) * | 1987-12-22 | 1989-06-29 | Mitsui Toatsu Chem Inc | Crt filter |
| JPH01307297A (en) * | 1988-06-04 | 1989-12-12 | Nitto Denko Corp | Static and electromagnetic wave shielding material |
| JPH02211493A (en) * | 1989-02-10 | 1990-08-22 | Nitto Denko Corp | Electromagnetic wave shield material for display |
| EP0454435A2 (en) * | 1990-04-24 | 1991-10-30 | Sharp Kabushiki Kaisha | Plain light source device |
| US5195822A (en) * | 1990-04-24 | 1993-03-23 | Sharp Kabushiki Kaisha | Plain light source device |
| FR2690041A1 (en) * | 1992-04-14 | 1993-10-15 | Clausse Georges | Shielding frame against electromagnetic fields emitted by CRT - has medium image filter for visualisation screen composed of magnetically permeable material. |
| JPH10153964A (en) * | 1996-05-09 | 1998-06-09 | Sumitomo Chem Co Ltd | Display front panel |
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