JPH0574364A - Color cathode-ray tube - Google Patents
Color cathode-ray tubeInfo
- Publication number
- JPH0574364A JPH0574364A JP23147491A JP23147491A JPH0574364A JP H0574364 A JPH0574364 A JP H0574364A JP 23147491 A JP23147491 A JP 23147491A JP 23147491 A JP23147491 A JP 23147491A JP H0574364 A JPH0574364 A JP H0574364A
- Authority
- JP
- Japan
- Prior art keywords
- shadow mask
- main surface
- bead
- ray tube
- color cathode
- 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
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
【0001】[0001]
【産業上の利用分野】本発明は、カラー陰極線管、特に
張り出し加工や絞り加工に際して生じた内部応力が、有
効領域とくに無孔領域に近い部分のシャドウマスク原板
材料に強く残留し、成形後の加熱などによって、歪みと
なって現われる現象を抑制した、HDTV等高精細度テ
レビジョン用カラー陰極線管などに好適なシャドウマス
クに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color cathode ray tube, and in particular, internal stress generated during overhanging or drawing is strongly retained in the material of the shadow mask original plate in the effective area, particularly in the area near the non-perforated area. The present invention relates to a shadow mask suitable for a color cathode ray tube for high definition television such as HDTV, which suppresses a phenomenon that appears as distortion due to heating or the like.
【0002】[0002]
【従来の技術】カラー陰極線管用シャドウマスクは一般
に、電子ビーム通過孔形成済みの平らなシャドウマスク
原板を、プレス金型によって、先ず所望の曲率を有する
曲面となるように張り出し加工を行ない、その後、有孔
領域の周囲に無孔領域が存在する主面の周辺を、絞り加
工によって主面に略直角に折り曲げてスカート部を形成
させている。そしてマスクフレームに上記シャドウマス
クをそのスカート部の端部で固着させる。シャドウマス
クは、カラー陰極線管のパネル内面に形成された、それ
ぞれ異なる原色の螢光体のドット又はストライプよりな
る螢光面に近接対向させて取付けられ、ある電子ビーム
通過孔を通過した特定原色専用の電子ビームを螢光面上
の前記特定原色螢光体のドット又はストライプに射突さ
せる作用をする。パネルに表示させる画面は矩形になっ
ているから、シャドウマスクの主面や有孔領域も略矩形
状となる。パネル内面の曲面形状とシャドウマスク主面
の曲面形状とは必ずしも一致せず、また、電子ビームが
電子ビーム通過孔を通過する際にシャドウマスク面とな
す傾斜角が、電子ビーム通過孔の位置がシャドウマスク
の中央部近傍か中央から離れた周辺部かで相違するた
め、電子ビームが電子ビーム通過孔を通過したのち螢光
面に到達するまでの電子飛行距離は電子ビーム通過孔の
シャドウマスク主面上の位置によって異なる。これに対
して螢光面を形成する各原色螢光体のドットやストライ
プは良好な画質を得るために矩形螢光面の各部で略一様
に配置されている。そのために、シャドウマスク原板の
有孔領域は、実際には、正確な矩形ではなく、矩形画面
の各辺に対応する部分の中央近傍で凹み画面の隅に対応
する個所で対角線方向に多少突出した形状になってい
る。従って、主面上の無孔領域の画面の辺に直交する方
向の幅は、各辺中央部では広く、有孔領域の隅(対角線
延長方向)の外側では短くなっている。2. Description of the Related Art In general, a shadow mask for a color cathode ray tube is produced by pressing a flat shadow mask original plate having electron beam passage holes formed therein into a curved surface having a desired curvature by a press die, and thereafter, The periphery of the main surface in which the non-perforated area exists around the perforated area is bent at a substantially right angle to the main surface by drawing to form a skirt portion. Then, the shadow mask is fixed to the mask frame at the end of the skirt. The shadow mask is attached to the fluorescent surface formed by dots or stripes of fluorescent materials of different primary colors formed on the inner surface of the panel of the color cathode ray tube in close proximity to each other, and is dedicated to a specific primary color passing through a certain electron beam passage hole. Of the above-mentioned electron beam is caused to impinge on the dots or stripes of the specific primary color phosphor on the phosphor surface. Since the screen displayed on the panel has a rectangular shape, the main surface of the shadow mask and the perforated area also have a substantially rectangular shape. The curved shape of the inner surface of the panel and the curved shape of the main surface of the shadow mask do not necessarily match, and the inclination angle of the electron beam passage hole when the electron beam passes through the electron beam passage hole is The electron flight distance from the electron beam passing through the electron beam passage hole to the fluorescent surface after the electron beam passes through the electron beam passage hole is different because it differs depending on whether the shadow mask is in the vicinity of the central portion or in the peripheral portion away from the center. It depends on the position on the surface. On the other hand, the dots and stripes of the primary color phosphors that form the fluorescent surface are arranged substantially uniformly on each part of the rectangular fluorescent surface in order to obtain good image quality. Therefore, the perforated area of the shadow mask original plate is actually not an exact rectangle, but rather is a dent near the center of the portion corresponding to each side of the rectangular screen, and it is slightly projected diagonally at the location corresponding to the corner of the screen. It has a shape. Therefore, the width of the non-perforated area on the main surface in the direction orthogonal to the side of the screen is wide at the center of each side and short outside the corner (diagonal extension direction) of the perforated area.
【0003】所望の如く電子ビーム通過用の開口部(ド
ット状またはストライプ状の孔)を設けたシャドウマス
ク原板に、曲面形状のための張り出し加工や、スカート
部形成のための絞り加工を行なうと、有孔領域の孔でな
い部分の材料が加工に際して作用される力は、無孔領域
の材料が作用される力よりも当然強くなり、加工後に材
料内部に残留する応力も、有孔領域では大きく、無孔領
域では小さくなる。スカート部形成加工時などには有効
領域になるべく力が加わらないような手段を講ずるけれ
ども、上記残留応力の相違が生ずることは防止できな
い。カラー陰極線管のシャドウマスクは、カラー陰極線
管の製造工程、たとえば螢光面形成後にシャドウマスク
取付け済みのパネルをファンネルに融着させる工程や管
内の排気工程では全面的に、また実際カラー陰極線管が
動作されるようになってからは電子ビーム衝撃によって
全面的または局部的に、かなり高温に加熱される。この
ような加熱やその後の降温過程は時間的にはゆっくり行
なわれ一種の焼なまし作業なので、内部残留応力が開放
されるのに伴って、シャドウマスクに変形すなわち歪み
が生じ、しかも上記のように内部残留応力はシャドウマ
スク上の位置によって異なるから、各部不均一な歪みと
なって、張り出し加工によって形成されたシャドウマス
クの当初の所望の曲面形状とは異なったものとなってし
まうことになる。When a shadow mask original plate having electron beam passage openings (dot-shaped or stripe-shaped holes) as desired is subjected to overhanging for forming a curved surface and drawing for forming a skirt. , The force exerted by the material in the non-hole portion of the perforated region during machining is naturally stronger than the force exerted by the material in the non-perforated region, and the stress remaining inside the material after machining is also large in the perforated region. , Becomes smaller in the non-hole area. Although a measure is taken so that force is not applied to the effective area when forming the skirt portion, it is impossible to prevent the difference in residual stress from occurring. The shadow mask of the color cathode ray tube is used in the manufacturing process of the color cathode ray tube, for example, in the process of fusing the panel with the shadow mask attached to the funnel after forming the fluorescent surface and the exhaust process in the tube. After being operated, it is heated to a considerably high temperature by electron beam bombardment, either locally or locally. Since such heating and subsequent cooling process are performed slowly in time and are a kind of annealing work, the shadow mask is deformed or distorted as the internal residual stress is released. In addition, since the internal residual stress varies depending on the position on the shadow mask, each part will have uneven strain, and will have a shape different from the initially desired curved surface shape of the shadow mask formed by the overhang process. ..
【0004】上記のような問題に対処するために従来か
ら種々の対策が提案され、例えば、特公昭57−206
61号公報や特公昭60−42580号公報には有孔領
域の周囲の無孔領域に多くても1つの凹状ビードを設け
ることが、また、実開昭62−131352号公報には
有孔領域の全周にわたり環状溝(凹状ビード)を設け、
その溝の深さを4隅コーナー部で極端に浅く、4辺中央
部で深くすることが、記載されている。Various countermeasures have been conventionally proposed in order to deal with the above problems, for example, Japanese Patent Publication No. 57-206.
No. 61 and Japanese Patent Publication No. 60-42580, at least one concave bead is provided in a non-perforated region around a perforated region, and in Japanese Utility Model Laid-Open No. 62-131352, there is a perforated region. An annular groove (concave bead) is provided over the entire circumference of
It is described that the depth of the groove is extremely shallow at the four corners and deep at the center of the four sides.
【0005】[0005]
【発明が解決しようとする課題】しかし、本発明者等の
実験によれば、有孔領域の全周にわたって1つの凹状ビ
ードを形成させただけでは歪みの発生を充分抑制するに
は不十分である。また、HDTV用カラー陰極線管では
カラー表示画面を形成するピクセル間の距離が狭いた
め、従来の通常のカラー陰極線管に比べて、シャドウマ
スクと螢光面の間の距離を短くしなければならない。そ
のため、シャドウマスク主面周辺の無孔領域の幅は狭く
なり、特に有孔領域が対角線方向に突出した形状になっ
ているシャドウマスクの画面4隅に対応する個所では、
無孔領域の幅は通常の大形カラー陰極線管の場合でも狭
い。したがって、有孔領域の周囲の無孔領域に全周にわ
たって複数の凹状ビードを形成させることは困難であ
る。特開平3−88240号公報には、有孔領域周辺の
無孔領域に凹状ビードを複数個設けることが開示され、
その添付図面には画面の隅に対応する個所に2重に凹状
ビードを設けたものが示されているが、実際にこのよう
に形成することは容易ではない。However, according to the experiments by the present inventors, forming one concave bead over the entire circumference of the perforated region is not sufficient to sufficiently suppress the occurrence of strain. is there. Further, in the color cathode ray tube for HDTV, the distance between pixels forming a color display screen is small, and therefore the distance between the shadow mask and the fluorescent surface must be shorter than that in the conventional normal color cathode ray tube. Therefore, the width of the non-perforated area around the main surface of the shadow mask is narrowed, and particularly at the location corresponding to the four corners of the screen of the shadow mask in which the perforated area is projected in the diagonal direction,
The width of the non-perforated area is narrow even in the case of a normal large color cathode ray tube. Therefore, it is difficult to form a plurality of concave beads around the entire perforated region in the non-perforated region. Japanese Unexamined Patent Publication No. 3-88240 discloses that a plurality of concave beads are provided in the non-perforated region around the perforated region.
Although the accompanying drawings show a double concave bead provided at a position corresponding to a corner of the screen, it is not easy to actually form such a bead.
【0006】また、近年、大形のカラー陰極線管の需要
が比率的に増大してきているが、大形画面用の場合、使
用中の電子ビーム衝撃によるシャドウマスクの加熱、温
度上昇、熱膨張の問題が比較的小形な画面用の場合に比
べて重大になってくる。そのため、鉄とニッケルの合金
で熱膨張係数が小さいアンバーをシャドウマスク材料と
して使用するようになってきたが、アンバーは従来のシ
ャドウマスクに使用されてきた軟鋼に比べて更に軟らか
い。そのために、アンバー使用のシャドウマスクでは、
張り出し加工によって、有孔領域で電子ビーム通過用開
口部の間の距離が軟鋼の場合に比して延び易くなり、ま
たアンバーを使用するような大形画面用の場合にはシャ
ドウマスクとしての剛性(自己形状保持性)不足が顕著
になり取扱困難になるなどの問題も発生する。Further, in recent years, the demand for large-sized color cathode ray tubes has increased in proportion, but in the case of large-sized screens, the shadow mask is heated, the temperature rises, and the thermal expansion occurs due to the electron beam impact during use. The problem becomes more serious than it is for smaller screens. For this reason, amber, which is an alloy of iron and nickel and has a small coefficient of thermal expansion, has come to be used as a shadow mask material. However, amber is still softer than mild steel used in conventional shadow masks. Therefore, in the shadow mask using Amber,
Due to the overhanging process, the distance between the electron beam passage openings in the perforated area becomes easier to extend than in the case of mild steel, and the rigidity as a shadow mask for large screens such as amber is used. (Self-shape retention) becomes notable and handling becomes difficult.
【0007】本発明は上記従来の問題を解決し、HDT
V等高精細度テレビジョン用にも使用できる実用的なシ
ャドウマスクを備えたカラー陰極線管を提供することを
目的とする。The present invention solves the above-mentioned conventional problems and improves the HDT.
An object of the present invention is to provide a color cathode ray tube equipped with a practical shadow mask that can be used for high definition television such as V.
【0008】[0008]
【課題を解決するための手段】上記目的を達成するため
に本発明においては、有孔領域の周囲に無孔領域が存在
し、所定の曲率を有する曲面に形成され、平面形状が略
矩形をなす主面と、主面周辺で曲率中心側へ略直角に折
り曲げられたスカート部とを有するシャドウマスクを備
えたカラー陰極線管において、電子ビーム通過孔形成済
みの平らなシャドウマスク原板に、まず、有孔領域の周
囲の無孔領域に、全周を囲む凹状ビード、及び、有孔領
域の対角線延長部近傍を除き、略矩形状に展開する有孔
領域の各辺に沿って、それぞれ、上記全周を囲む凹状ビ
ードの外側に各辺両端近くまで延在する付設凹状ビード
を形成させたのち、張り出し加工によって曲面を形成
し、その後さらに絞り加工によって主面周辺のスカート
部を形成させることにした。In order to achieve the above object, in the present invention, a non-perforated region exists around a perforated region, is formed into a curved surface having a predetermined curvature, and has a substantially rectangular planar shape. In a color cathode ray tube provided with a shadow mask having a main surface to be formed and a skirt portion that is bent at a substantially right angle to the center of curvature in the periphery of the main surface, a flat shadow mask original plate with electron beam passage holes formed, first, In the non-perforated area around the perforated area, a concave bead that surrounds the entire circumference, and except for the vicinity of the diagonal extension of the perforated area, along each side of the perforated area that develops into a substantially rectangular shape, respectively, After forming the attached concave beads that extend near both ends of each side on the outside of the concave bead that surrounds the entire circumference, form a curved surface by overhanging, and then form the skirt part around the main surface by drawing. It was.
【0009】[0009]
【作用】無孔領域に凹状ビードがあれば、その溝状断面
の側壁の傾斜が変化することによって比較的弱い力によ
って無孔領域でも容易に変形できるようになるから、平
らなシャドウマスク原板を張り出し加工によって曲面に
加工するときに、無孔領域に最初に凹状ビードが設けて
あれば、有孔領域と無孔領域とで材料に作用する内部応
力の相違が低下し、また、全面的に残留応力が弱くな
る。本発明によって、上記のように作用する凹状ビード
を、有孔領域の周囲の無孔領域に、4隅の部分を除いて
2重に形成させれば、張り出し加工時に、シャドウマス
ク材料内部に生ずる応力が全面的に低下し、かつ、有孔
領域と無孔領域とでの応力の相違が、凹状ビードを設け
ない場合や設けても1重の場合に比べて遥かに小さくな
って均一化され、シャドウマスクをパネル内部に装着し
たのちのカラー陰極線管製造工程における加熱やカラー
陰極線管動作状態での電子ビーム衝撃による加熱などに
よっても、内部残留応力に起因する局部的な歪みが生じ
難くなる。また、凹状ビードは曲げモーメントに対して
梁のように作用するから、本発明によるシャドウマスク
は従来のシャドウマスクに比べて曲がり難く、取扱容易
になることも明らかである。If there is a concave bead in the non-perforated area, the inclination of the side wall of the groove-shaped cross section can be changed so that the non-perforated area can be easily deformed by a relatively weak force. When forming a curved surface by overhanging, if the concave bead is first provided in the non-perforated region, the difference in internal stress acting on the material between the perforated region and the non-perforated region will be reduced, Residual stress becomes weak. According to the present invention, if the concave bead that acts as described above is doubled in the non-perforated region around the perforated region except for the four corner portions, it is generated inside the shadow mask material during the overhanging process. The stress is reduced on the whole surface, and the difference in stress between the perforated region and the non-perforated region is much smaller than that in the case where no concave bead is provided or the case where the concave bead is provided is uniformized. The local distortion due to the internal residual stress is less likely to occur even by heating in the manufacturing process of the color cathode ray tube after mounting the shadow mask inside the panel or heating by electron beam impact in the operating state of the color cathode ray tube. Further, since the concave bead acts like a beam against a bending moment, it is apparent that the shadow mask according to the present invention is less likely to bend than the conventional shadow mask and is easy to handle.
【0010】[0010]
【実施例】以下、本発明のカラー陰極線管について実施
例によって具体的に説明する。EXAMPLES The color cathode ray tube of the present invention will be specifically described below with reference to examples.
【0011】図2はカラー陰極線管の側断面図である。
図中、1はパネル、2はファンネル、3はネック管、4
は螢光面、5はそれぞれ赤、緑、青螢光体を発光させる
ための3本の専用電子ビーム、6は電子銃、7はシャド
ウマスク、8はマスクフレーム、9はマスクフレームに
固着された板ばね、10はパネルスカート内面に植設さ
れ端部が前記板ばね端部の孔と係合してマスクフレーム
を介してシャドウマスクをパネル裏面に形成された螢光
面に近接対向した所定の位置に着脱自在に保持するため
のスタッドピン、11は薄い強磁性体板で形成された環
境磁界遮蔽用のインナシールド、12は電子ビームを偏
向させて螢光面を左から右へ水平走査を繰り返させなが
ら上から下へ順次垂直走査させて画像を表示させる偏向
ヨークである。シャドウマスクは、それだけでは自己形
状保持性に乏しいから、まず比較的丈夫なL型断面の材
料などで額縁状に形成したマスクフレームに取付けてシ
ャドウマスク構体に組み立てたのち、パネル内面に装着
する。フォトリソグラフィ技術によるブラックマトリク
ス膜や3原色螢光体のドット又はストライプよりなる螢
光面形成に際して、それぞれ異なる感光性膜に対し露
光、現像作業を行なうが、特定シャドウマスク構体を特
定パネルに組合せて感光性膜を露光させたのち、現像し
て不要部分を除去する作業を行なう時にはシャドウマス
クを取り外す必要があるから、上記のように板ばねとス
タッドピンの組合せで着脱自在にしてある。FIG. 2 is a side sectional view of the color cathode ray tube.
In the figure, 1 is a panel, 2 is a funnel, 3 is a neck tube, 4
Is a fluorescent surface, 5 are three dedicated electron beams for emitting red, green, and blue phosphors respectively, 6 is an electron gun, 7 is a shadow mask, 8 is a mask frame, and 9 is fixed to the mask frame. A leaf spring 10 is embedded in the inner surface of the panel skirt, and its end portion engages with a hole in the end portion of the leaf spring so that a shadow mask is closely faced to a fluorescent surface formed on the back surface of the panel through a mask frame. , 11 is a stud pin for detachably holding it, 11 is an inner shield for shielding the environmental magnetic field formed by a thin ferromagnetic plate, and 12 is a horizontal scanning from left to right on the fluorescent surface by deflecting the electron beam. Is a deflection yoke that displays an image by sequentially performing vertical scanning from top to bottom while repeating. Since the shadow mask itself is poor in self-shape-retaining property, it is first mounted on a mask frame formed in a frame shape with a relatively strong material having an L-shaped cross section, assembled into a shadow mask structure, and then mounted on the inner surface of the panel. When forming a fluorescent surface consisting of black matrix film and dots or stripes of three primary color fluorescent materials by photolithography technology, different photosensitive films are exposed and developed, but a specific shadow mask structure is combined with a specific panel. After the photosensitive film is exposed, it is necessary to remove the shadow mask when performing the work of developing and removing the unnecessary portion. Therefore, the combination of the leaf spring and the stud pin is made detachable as described above.
【0012】図1(a)は本発明によるカラー陰極線管
に備えられたシャドウマスクの一実施例の主面の縦横中
心線により区切られた1/4の部分を示す正面図、図1
(b)は図1(a)中に示すA−A’線断面図、図1
(c)は図1(a)中に示すB−B’線断面図である。
シャドウマスク7の主面は有孔領域71とその周囲の無
孔領域72よりなり、さらに無孔領域72には有孔領域
71の全周にわたって形成された凹状ビード73、有孔
領域71の長辺に沿って形成された凹状ビード74、有
孔領域71の短辺に沿って形成された凹状ビード75が
設けられている。この図に示すように、有孔領域71の
対角線延長部すなわち隅の部分では、無孔領域72の幅
が狭いので、図1(c)に示すように凹状ビード73し
か設けられていないが、有孔領域71の長辺や短辺に沿
った部分では無孔領域72の幅が充分あるので、図1
(b)に示すように全周にわたって形成された凹状ビー
ド73のほかに、その辺に沿って辺の両端近くまで延在
する凹状ビード74や75が設けてある。このようにし
たので、張り出し加工時に、シャドウマスクの材料に加
わる応力は全面的に弱くなり、かつ、有孔領域と無孔領
域とで殆ど同一に均一化され、図2に示したように、シ
ャドウマスク7をマスクフレーム8に取付けてシャドウ
マスク構体に組み立て、カラー陰極線管のパネルに装着
したのち、カラー陰極線管の製造工程中や実動作状態で
シャドウマスク7が高温に加熱されて、その焼なまし的
効果によってシャドウマスク材料に残留していた内部応
力が開放、緩和されたとき、局部的な歪みが現われるよ
うなことはなくなる。FIG. 1 (a) is a front view showing a quarter portion of a main surface of a shadow mask provided in a color cathode ray tube according to the present invention, which is divided by vertical and horizontal centerlines.
1B is a cross-sectional view taken along the line AA ′ shown in FIG.
FIG. 1C is a sectional view taken along line BB ′ shown in FIG.
The main surface of the shadow mask 7 is composed of a perforated region 71 and a non-perforated region 72 around the perforated region 71. Further, in the non-perforated region 72, a concave bead 73 formed over the entire circumference of the perforated region 71 and a length of the perforated region 71. A concave bead 74 formed along the side and a concave bead 75 formed along the short side of the perforated region 71 are provided. As shown in this figure, since the width of the non-perforated region 72 is narrow at the diagonal extension of the perforated region 71, that is, at the corner, only the concave bead 73 is provided as shown in FIG. 1C. Since the width of the non-perforated region 72 is sufficient in the portion along the long side or the short side of the perforated region 71, as shown in FIG.
As shown in (b), in addition to the concave bead 73 formed over the entire circumference, concave beads 74 and 75 extending along the side to near both ends of the side are provided. Since this is done, the stress applied to the material of the shadow mask during the overhanging process is weakened over the whole area, and is made almost uniform in the perforated region and the non-perforated region, as shown in FIG. After mounting the shadow mask 7 on the mask frame 8 to assemble it into a shadow mask structure and mounting it on the panel of the color cathode ray tube, the shadow mask 7 is heated to a high temperature during the manufacturing process of the color cathode ray tube or in the actual operating state, and its burning is performed. When the internal effect remaining in the shadow mask material is released and relaxed by the grading effect, no local strain appears.
【0013】図3は本発明の他の実施例を示すもので、
シャドウマスク主面の短辺に沿った無孔領域72の幅が
小さく、凹状ビード73の他に更に凹状ビードを付設で
きない場合の例の、縦横中心線によって区切られた1/
4の部分の正面図である。このように無孔領域72の幅
が狭くて、短辺に沿って2本目の凹状ビードを付設でき
ないときは、本発明の趣旨にのっとって、この部分で凹
状ビード73の深さを極力深くする。深くするために必
要ならば幅も多少広くする。このようにすれば、凹状ビ
ードを2重に設けた場合に比べて効果がやや劣るのは止
むをえないが、短辺に凹状ビード73が1本だけでもか
なりの効果が得られる。FIG. 3 shows another embodiment of the present invention.
In the case where the width of the non-perforated region 72 along the short side of the shadow mask main surface is small and a concave bead 73 cannot be additionally provided in addition to the concave bead 73,
It is a front view of the part of 4. When the non-perforated region 72 has such a narrow width that the second concave bead cannot be attached along the short side, the depth of the concave bead 73 is made as deep as possible at this portion according to the gist of the present invention. .. If necessary to make it deeper, make it a little wider. In this way, the effect is slightly inferior to the case where two concave beads are provided, but even if only one concave bead 73 is provided on the short side, a considerable effect can be obtained.
【0014】図4は本発明の更に他の実施例を示すもの
で、2本目の凹状ビード74を付設する際に、全周にわ
たって設けられた凹状ビード73に2本目の凹状ビード
74を端部に到るまで平行に付設しようとすると、主面
の隅に近い部分で無孔領域72の幅が狭く、付設凹状ビ
ード74の長さが短くなり過ぎるような場合の対策例の
縦横中心線によって区切られた1/4部分の正面図であ
る。この例では、付設凹状ビード74は主面の隅の近く
では、次第に全周にわたって設けられた凹状ビード73
に近付けられ、無孔部の幅が狭い主面の隅では2本の凹
状ビードは合流して1本になっている。このようにすれ
ば、付設凹状ビードの長さを長くすることができ、その
効果も大きくなる。FIG. 4 shows still another embodiment of the present invention. When the second concave bead 74 is attached, the second concave bead 74 is attached to the concave bead 73 provided over the entire circumference. Up to, the width of the non-perforated area 72 is narrow near the corner of the main surface, and the length of the attached concave bead 74 becomes too short. It is a front view of the 1/4 part divided. In this example, the attached concave bead 74 is provided near the corner of the main surface so that the concave bead 73 is gradually provided over the entire circumference.
At the corner of the main surface where the non-hole portion has a narrow width, the two concave beads are merged into one. With this, the length of the attached concave bead can be increased, and the effect thereof can be increased.
【0015】[0015]
【発明の効果】以上説明したように本発明によれば、平
らなシャドウマスク原板を曲面に形成するための張り出
し加工後に、シャドウマスクの材料に残留する内部応力
を、全面的に弱く、かつ、有孔領域と無孔領域とで殆ど
相違がないように均一化させることが可能となり、カラ
ー陰極線管のパネルに装着された後にシャドウマスクが
加熱、放冷(主として熱放射による徐冷)による焼なま
し類似の過程を経ても、局部的歪みが現われず、当初の
所望の形状、寸法をほぼ維持できるようになって、この
ようなシャドウマスクを用いた本発明カラー陰極線管で
は色ずれなどが略完全に抑制される。更に上記のような
シャドウマスクは、凹状ビードが補強梁として作用して
剛性を増すので、本発明カラー陰極線管は大形でもシャ
ドウマスクの取扱が容易で生産性良好である。As described above, according to the present invention, the internal stress remaining in the material of the shadow mask is entirely weakened after the overhanging process for forming the flat shadow mask original plate on the curved surface, and It is possible to make the holed area and the non-holed area uniform so that there is almost no difference, and after the shadow mask is mounted on the panel of the color cathode ray tube, the shadow mask is heated and cooled by cooling (mainly by heat radiation). Even after passing through a similar process, local distortion does not appear, and the initial desired shape and size can be almost maintained, and the color cathode ray tube of the present invention using such a shadow mask causes color misregistration. It is almost completely suppressed. Further, in the shadow mask as described above, since the concave bead acts as a reinforcing beam to increase the rigidity, the shadow cathode mask of the present invention is easy to handle even if it is large, and the productivity is good.
【図1】図1(a)は本発明によるカラー陰極線管に備
えられたシャドウマスクの一実施例の主面の縦横中心線
により区切られた1/4の部分を示す正面図、図1
(b)は図1(a)中に示すA−A’線断面図、図1
(c)は図1(a)中に示すB−B’線断面図である。FIG. 1 (a) is a front view showing a quarter portion of a main surface of a shadow mask provided in a color cathode ray tube according to the present invention, which is divided by vertical and horizontal centerlines.
1B is a cross-sectional view taken along the line AA ′ shown in FIG.
FIG. 1C is a sectional view taken along line BB ′ shown in FIG.
【図2】本発明によるカラー陰極線管の側断面図であ
る。FIG. 2 is a side sectional view of a color cathode ray tube according to the present invention.
【図3】無孔領域の幅が狭く、凹状ビードを2重に設け
難い場合に本発明の趣旨にのっとって対策した例を示す
図である。FIG. 3 is a diagram showing an example in which measures are taken in accordance with the gist of the present invention when the width of the non-perforated region is narrow and it is difficult to provide two concave beads.
【図4】無孔領域の幅が狭い場合に付設凹状ビードの辺
に沿った長さをなるべく長くした例を示す図である。FIG. 4 is a view showing an example in which the length along the side of the attached concave bead is made as long as possible when the width of the non-hole region is narrow.
1…パネル、 2…ファンネル、 3…ネック管、 4
…螢光面、 5…赤、緑、青螢光体を発光させるための
3本の専用電子ビーム、 6…電子銃、 7…シャドウ
マスク、 8…マスクフレーム、 9…マスクフレーム
に固着された板ばね、 10…パネルスカート内面に植
設されたスタッドピン、 11…インナシールド、 1
2…偏向ヨーク、 71…有孔領域、 72…無孔領
域、 73…全周にわたって形成された凹状ビード、
74…長辺に沿って形成された凹状ビード、 75…短
辺に沿って形成された凹状ビード。1 ... Panel, 2 ... Funnel, 3 ... Neck tube, 4
... Fluorescent surface, 5 ... Three dedicated electron beams for emitting red, green, and blue phosphors, 6 ... Electron gun, 7 ... Shadow mask, 8 ... Mask frame, 9 ... Fixed to the mask frame Leaf spring, 10 ... stud pin implanted on the inner surface of the panel skirt, 11 ... inner shield, 1
2 ... Deflection yoke, 71 ... Perforated region, 72 ... Non-perforated region, 73 ... Recessed bead formed over the entire circumference,
74 ... A concave bead formed along the long side, 75 ... A concave bead formed along the short side.
Claims (1)
の曲率を有する曲面に形成され、平面形状が略矩形をな
す主面と、主面周辺で曲率中心側へ略直角に折り曲げら
れたスカート部とを有するシャドウマスクを備えたカラ
ー陰極線管において、電子ビーム通過孔形成済みの平ら
なシャドウマスク原板に、まず、有孔領域の周囲の無孔
領域に、全周を囲む凹状ビード、及び、有孔領域の対角
線延長部近傍を除き、略矩形状に展開する有孔領域の各
辺に沿って、それぞれ、上記全周を囲む凹状ビードの外
側に各辺両端近くまで延在する付設凹状ビードを形成さ
せたのち、張り出し加工によって曲面を形成し、その後
さらに絞り加工によって主面周辺のスカート部を形成し
てなるシャドウマスクを備えたことを特徴とするカラー
陰極線管。1. A main surface having a non-perforated area around a perforated area, formed into a curved surface having a predetermined curvature, and having a substantially rectangular planar shape, and a substantially right angle around the main surface toward the center of curvature. In a color cathode ray tube provided with a shadow mask having a bent skirt portion, a flat shadow mask original plate having electron beam passage holes formed therein is first formed in a non-perforated area around a perforated area and a concave shape surrounding the entire circumference. Except near the bead and the diagonal extension of the perforated region, along each side of the perforated region that develops in a substantially rectangular shape, extend to the outside of the concave bead that encloses the entire circumference and near each side end. A color cathode ray tube, comprising: a shadow mask formed by forming an attached concave bead, forming a curved surface by overhanging, and then forming a skirt portion around the main surface by drawing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23147491A JPH0574364A (en) | 1991-09-11 | 1991-09-11 | Color cathode-ray tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23147491A JPH0574364A (en) | 1991-09-11 | 1991-09-11 | Color cathode-ray tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0574364A true JPH0574364A (en) | 1993-03-26 |
Family
ID=16924063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23147491A Pending JPH0574364A (en) | 1991-09-11 | 1991-09-11 | Color cathode-ray tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0574364A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7227298B2 (en) | 2004-12-17 | 2007-06-05 | Matsushita Toshiba Picture Display Co., Ltd. | Color picture tube and method for manufacturing the same |
KR100823186B1 (en) * | 2001-11-28 | 2008-04-18 | 삼성에스디아이 주식회사 | Mask assembly for cathode ray tube having means of relieving external shock |
-
1991
- 1991-09-11 JP JP23147491A patent/JPH0574364A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100823186B1 (en) * | 2001-11-28 | 2008-04-18 | 삼성에스디아이 주식회사 | Mask assembly for cathode ray tube having means of relieving external shock |
US7227298B2 (en) | 2004-12-17 | 2007-06-05 | Matsushita Toshiba Picture Display Co., Ltd. | Color picture tube and method for manufacturing the same |
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