JPH01169847A - Shadow mask for color cathode-ray tube - Google Patents
Shadow mask for color cathode-ray tubeInfo
- Publication number
- JPH01169847A JPH01169847A JP32690587A JP32690587A JPH01169847A JP H01169847 A JPH01169847 A JP H01169847A JP 32690587 A JP32690587 A JP 32690587A JP 32690587 A JP32690587 A JP 32690587A JP H01169847 A JPH01169847 A JP H01169847A
- Authority
- JP
- Japan
- Prior art keywords
- shadow mask
- curved surface
- corners
- color cathode
- skirt section
- 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
- 238000000465 moulding Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 5
- 238000010894 electron beam technology Methods 0.000 abstract description 7
- 101100269850 Caenorhabditis elegans mask-1 gene Proteins 0.000 abstract description 6
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/07—Shadow masks
- H01J2229/0727—Aperture plate
- H01J2229/0766—Details of skirt or border
- H01J2229/0772—Apertures, cut-outs, depressions, or the like
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、所望の形状に正しく成形し易く、良好な画像
表示品質が得られるカラー陰極線管用シャドウマスクに
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shadow mask for a color cathode ray tube that is easily molded into a desired shape and provides good image display quality.
一般に、カラー陰極線管用シャドウマスクは、円形また
はスリット形の多数の開孔を配設した有孔領域と其の周
辺の開孔の無い無孔領域を有するほぼ長方形の輪郭を有
する平らなシャドウマスク材料板をプレス成形法により
加工して、第２図に示すような、上方から見た平面形状
が長方形に近い曲面部２と、この曲面部２の周辺を囲み
曲面部に対してほぼ直角に折り曲げられたスカート部３
とよりなるシャドウマスクエに形成される。曲面部２の
形状は任意の曲面であって、球面などに限定されるもの
ではなく、また有孔領域４は此の曲面部２に全て包・含
されており、曲面部２の外周部は孔の無い部分である。In general, a shadow mask for a color cathode ray tube is a flat shadow mask material having an approximately rectangular outline with a perforated region having a large number of circular or slit-shaped apertures and a surrounding non-porous region without any apertures. A plate is processed by a press molding method to form a curved surface part 2 whose planar shape is nearly rectangular when viewed from above, as shown in FIG. skirt part 3
A shadow mask is formed. The shape of the curved surface portion 2 is an arbitrary curved surface, and is not limited to a spherical surface or the like, and the perforated region 4 is entirely included in this curved surface portion 2, and the outer peripheral portion of the curved surface portion 2 is This is the part without holes.
上記のような、内部に有孔領域、その外周に無孔領域を
有する平らなシャドウマスク材料板を第２図に示すよう
な形状のシャドウマスク１にプレス成形した場合、スカ
ート部３には圧縮応力が発生し、その圧縮応力はスカー
ト部３の外周になるほど大きく、また特に曲面部２の長
方形平面形状の四隅に対応する個所では著しく大きくな
る。When a flat shadow mask material plate having a perforated area inside and a non-porous area on the outer periphery is press-molded into a shadow mask 1 having a shape as shown in FIG. Stress is generated, and the compressive stress becomes larger toward the outer periphery of the skirt portion 3, and particularly becomes significantly larger at locations corresponding to the four corners of the rectangular planar shape of the curved surface portion 2.
圧縮応力が余りにも大きくなると、プレス成形が十分、
完全には行われず、第３図に示すプレス成形後の拡大断
面図から判るように、曲面部２に対してほぼ直角に折り
曲げられるべきスカート部３が、スプリングバンクによ
り外方へ広がってしまったり、また波形にたわんだりす
る。このようなスプリングバンクを生じているシャドウ
マスク１を、シャドウマスク１を支持補強すべきフレー
ム５（第３図参照）に、溶接等により無理に固定してし
まうと、シャドウマスクのスカート部３に歪が生ずるの
は当然であるが、更に曲面部２の有孔領域４にまでも歪
を生じさせることになってしまう。If the compressive stress becomes too large, press forming may not be sufficient.
As can be seen from the enlarged cross-sectional view after press forming shown in FIG. 3, the skirt portion 3, which should be bent at almost right angles to the curved surface portion 2, was not completely bent, and the spring bank caused the skirt portion 3 to expand outward. , it also bends into a waveform. If the shadow mask 1 with such a spring bank is forcibly fixed by welding or the like to the frame 5 (see Fig. 3) that should support and reinforce the shadow mask 1, the skirt portion 3 of the shadow mask will It is natural that distortion occurs, but it also causes distortion in the perforated region 4 of the curved surface portion 2.
上記従来の技術によって製作した、スカート部の大きな
圧縮応力のためスプリングバックを生じ、有孔領域４に
まで歪が生じているシャドウマスクを装着したカラー陰
極線管では、有孔領域４の歪のために、カラー陰極線管
の製造工程に於ける数回にわたる４００〜５００℃の加
熱により開孔位置が所期の位置から変動し、この開孔を
通過した電子ビームが、本来到達すべきバルブパネル内
面のドツト状またはストライプ状螢光体の位置から外れ
、いわゆるミスランディングを起こす。このようなミス
ランディングに対しては、カラー陰極線管の設計に際し
裕度をとっであるが、ミスランディング量が、この設計
上の裕度を越えた場合には、色むらや色ずれを生じて表
示品質を悪くするという問題が生ずる。In a color cathode ray tube manufactured by the above-mentioned conventional technology, which is equipped with a shadow mask that causes springback due to the large compressive stress in the skirt portion, and distortion occurs even in the perforated area 4, due to the distortion in the perforated area 4. During the manufacturing process of color cathode ray tubes, heating at 400 to 500°C several times causes the aperture position to shift from its intended position, causing the electron beam that passes through this aperture to reach the inner surface of the valve panel, where it was originally intended to reach. The dot-like or stripe-like phosphor may deviate from its position, causing so-called mislanding. To prevent such mislanding, allowances are made in the design of color cathode ray tubes, but if the amount of mislanding exceeds this design allowance, color unevenness or color shift may occur. A problem arises in that display quality deteriorates.
本発明は、上記従来の技術により製造したシャドウマス
クの問題点を解決し、プレス成形に際しスカート部に過
大な圧縮応力が発生せず、従って電子ビームのミスラン
ディングによる表示品質の劣化も生じないようにしたカ
ラー陰極線管用シャドウマスクを提供することを目的と
する。The present invention solves the problems of shadow masks manufactured by the above-mentioned conventional technology, and prevents excessive compressive stress from occurring in the skirt portion during press molding, and therefore prevents deterioration of display quality due to mislanding of electron beams. The purpose of the present invention is to provide a shadow mask for a color cathode ray tube.
上記問題点を解決するために本発明においては、シャド
ウマスクをプレス成形する際に用いる、平らなシャドウ
マスク材料板の有孔領域の外側の、プレス成形後にスカ
ート部の四隅となる個所に、多数のほぼ円形の小孔を設
けることにした。In order to solve the above problems, in the present invention, a large number of holes are placed at the four corners of the skirt portion after press molding, outside the perforated area of the flat shadow mask material plate used when press molding the shadow mask. I decided to make a small, almost circular hole.
本発明によるシャドウマスクも、従来のシャドウマスク
と同様に、平らなシャドウマスク材料板からプレス成形
法により形成するのであるが、成形後スカート部の四隅
になる個所に予め多数のほぼ円形の小孔を設けであるの
で、プレス成形の際に、スカート部の四隅に発生する圧
縮応力を吸収することができ、スカート部に発生するス
プリングバック量を小さくすることが出来る。このため
、シャドウマスクとフレームとを溶接固定した時に、シ
ャドウマスクの有孔領域に発生する歪を従来に比較して
非常に小さくすることが出来る。従って、陰極線管製造
工程で加熱を受けた後の、有孔領域にある円形またはス
リット形の開孔の位置の変動は、従来のシャドウマスク
の場合に比較して極めて少なくなり、電子ビームのミス
ランディングをなくすことができ、色むら、色ずれなど
による表示品質の劣化を防止することが出来る。The shadow mask according to the present invention, like conventional shadow masks, is formed from a flat shadow mask material plate by press molding, but after molding, a large number of approximately circular small holes are formed in advance at the four corners of the skirt portion. , it is possible to absorb the compressive stress generated at the four corners of the skirt portion during press molding, and it is possible to reduce the amount of springback generated in the skirt portion. Therefore, when the shadow mask and the frame are fixed by welding, the strain generated in the perforated region of the shadow mask can be made much smaller than in the past. Therefore, the fluctuation in the position of the circular or slit-shaped apertures in the perforated area after being heated in the cathode ray tube manufacturing process is extremely small compared to the case of conventional shadow masks, and the electron beam misalignment Landing can be eliminated, and deterioration of display quality due to color unevenness, color shift, etc. can be prevented.
なお、スカート部の四隅に対応する個所に設ける多数の
小孔は、圧縮応力を吸収するためのものであるから、孔
の形状が正確な円形である必要はない。しかし、ホトエ
ツチング法で穿孔して平らなシャドウマスク材料板を製
作する際の容易さや、プレス成形時の扱い易さなどから
、鋭角を持たない形状（結局円形に近い）の小さい孔を
多数設ける（応力をなるべく一様に分散して吸収し、し
かもプレス時に切れなどが生じないように）のが無難と
いうことになる。Note that the large number of small holes provided at locations corresponding to the four corners of the skirt portion are for absorbing compressive stress, so the shape of the holes does not need to be exactly circular. However, in order to make it easier to produce a flat shadow mask material plate by perforating it using the photo-etching method, and to make it easier to handle during press molding, many small holes with a shape that does not have an acute angle (almost circular after all) are provided ( It is safe to absorb the stress by distributing it as evenly as possible, and also to avoid any cuts during pressing.
第１図は本発明の一実施例の斜視図である。 FIG. 1 is a perspective view of an embodiment of the present invention.
カラー陰極線管用シャドウマスク１は円形またはスリッ
ト形の多数の開孔を有する有孔領域４と有孔領域４を包
含する任意の曲面部２と、曲面部２に対し略直角に折り
曲げられたスカート部３とからなり、スカート部３の四
隅の個所には多数の円形の小孔６が設けられている。A shadow mask 1 for a color cathode ray tube includes a perforated region 4 having a large number of circular or slit-shaped apertures, an arbitrary curved surface portion 2 that includes the perforated region 4, and a skirt portion bent at a substantially right angle to the curved surface portion 2. 3, and a large number of small circular holes 6 are provided at the four corners of the skirt portion 3.
本発明に係るシャドウマスク１は、スカート部３の四隅
となる個所に予め多数の小孔６を設けたシャドウマスク
材料板からプレス加工により形成するので、プレス成形
の際に、スカート部３の四隅に発生する圧縮応力は従来
に比較して非常に小さ（なり、その結果、スプリングバ
ック量も小さくなるため所定の形状にすることが容易と
なる。The shadow mask 1 according to the present invention is formed by press working from a shadow mask material plate in which a large number of small holes 6 are previously provided at the four corners of the skirt portion 3. The compressive stress generated is much smaller than in the past, and as a result, the amount of springback is also reduced, making it easier to form a predetermined shape.
そのため、シャドウマスクを補強支持するフレームとの
嵌合も良くなり、シャドウマスクとフレームとを溶接に
より固定したときに、スカート部３、曲面部２、有孔領
域４等に生ずる歪を非常に小さくすることが出来る。従
って、陰極線管製造工程における熱工程後にも、有孔領
域４にある円形またはスリット形の開孔位置の変動が従
来の場合に比べて非常に小さくなり、電子ビームのミス
ランディングをなくすことができ、その結果として、色
むら、色ずれをなくすることが出来る。Therefore, the fit with the frame that reinforces and supports the shadow mask is improved, and when the shadow mask and frame are fixed by welding, the distortion that occurs in the skirt portion 3, curved surface portion 2, perforated area 4, etc. is minimized. You can. Therefore, even after the thermal process in the cathode ray tube manufacturing process, fluctuations in the position of the circular or slit-shaped openings in the perforated region 4 are much smaller than in the conventional case, making it possible to eliminate mislanding of the electron beam. As a result, color unevenness and color shift can be eliminated.
近年、大形テレビジョン受像機が好まれているが、この
ような受像機に使用される大形カラー陰極線管では、シ
ャドウマスクの加熱膨張による所謂ドーミング現象を抑
制するため、シャドウマスクの材料として熱膨張係数の
小さいアンバー（Ｆｅ−Ｎｉ系合金、１ｎｖａｒ）を用
いることがあるが、この材料は従来シャドウマスク材料
として用いられて来た軟鋼に比較して硬く、プレス成形
の際のスプリングバックも大きくなり易いが、本発明に
よれば、アンバーを材料にしたシャドウマスクでも表示
品質劣化が見られなかった。In recent years, large-sized television receivers have become popular, and in the large-sized color cathode ray tubes used in such receivers, in order to suppress the so-called doming phenomenon caused by thermal expansion of the shadow mask, it is necessary to use materials for the shadow mask. Amber (Fe-Ni alloy, 1nvar), which has a small coefficient of thermal expansion, is sometimes used, but this material is harder than mild steel, which has traditionally been used as a shadow mask material, and it also suffers from springback during press forming. Although the size tends to increase, according to the present invention, no deterioration in display quality was observed even with a shadow mask made of amber.
以上説明したように本発明によれば、プレス成形法によ
り製作したシャドウマスクの成形後の歪を非常に小さく
出来るので、この歪に起因する電子ビームのミスランデ
ィング、色むら、色ずれをなくすことが出来る。As explained above, according to the present invention, the distortion after molding of the shadow mask manufactured by the press molding method can be made extremely small, so that mislanding of electron beams, color unevenness, and color shift caused by this distortion can be eliminated. I can do it.
第１図は本発明一実施例の斜視図、第２図は従来のシャ
ドウマスクの斜視図、第３図はプレス成形後のシャドウ
マスクとフレームの接合部近傍の拡大断面図である。
１− シャドウマスク、 ２・・・曲面部、 ３・−ス
カート部、 ４−有孔領域、 ５−・・フレーム、６
−・スカート部四隅に設けた多数の円形小孔。
第１図
第２図
第３図FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a perspective view of a conventional shadow mask, and FIG. 3 is an enlarged sectional view of the vicinity of the joint between the shadow mask and the frame after press molding. 1-Shadow mask, 2--Curved surface portion, 3--Skirt portion, 4--Perforated area, 5---Frame, 6
- Many small circular holes in the four corners of the skirt. Figure 1 Figure 2 Figure 3
Claims (1)
領域と其の周辺の開孔の無い無孔領域とからなり上方か
ら見た平面形状が長方形に近い曲面部と、この曲面部の
周辺を囲み曲面部に対して略直角に折り曲げられたスカ
ート部とからなるカラー陰極線管用シャドウマスクにお
いて、プレス成形加工に用いる平らなシャドウマスク材
料板として、有孔領域の開孔のほかに、有孔領域の外側
の、成形後スカート部の上記長方形の四隅となる個所に
、予め多数のほぼ円形の小孔を設けたものを用いて、プ
レス成形法により形成したことを特徴とするカラー陰極
線管用シャドウマスク。1. A curved surface portion whose planar shape is close to a rectangle when viewed from above, which is composed of a perforated region with a large number of circular or slit-shaped holes and a surrounding non-porous region with no holes, and this curved surface portion In a color cathode ray tube shadow mask consisting of a skirt part surrounding the periphery of the curved part and bent at a substantially right angle to the curved surface part, as a flat shadow mask material plate used for press molding, in addition to openings in the perforated area, A color cathode ray characterized in that it is formed by a press molding method using a large number of approximately circular small holes provided in advance at the four corners of the rectangle of the skirt portion after molding, outside the perforated area. Shadow mask for tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32690587A JPH01169847A (en) | 1987-12-25 | 1987-12-25 | Shadow mask for color cathode-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32690587A JPH01169847A (en) | 1987-12-25 | 1987-12-25 | Shadow mask for color cathode-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01169847A true JPH01169847A (en) | 1989-07-05 |
Family
ID=18193059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32690587A Pending JPH01169847A (en) | 1987-12-25 | 1987-12-25 | Shadow mask for color cathode-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01169847A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980022930A (en) * | 1996-09-24 | 1998-07-06 | 손욱 | Color awards |
| US7105995B2 (en) | 2003-09-17 | 2006-09-12 | Lg.Philips Display Co., Ltd. | Color cathode ray tube |
-
1987
- 1987-12-25 JP JP32690587A patent/JPH01169847A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980022930A (en) * | 1996-09-24 | 1998-07-06 | 손욱 | Color awards |
| US7105995B2 (en) | 2003-09-17 | 2006-09-12 | Lg.Philips Display Co., Ltd. | Color cathode ray tube |
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