JPH0729505A - Shadow mask for color cathode-ray tube - Google Patents
Shadow mask for color cathode-ray tubeInfo
- Publication number
- JPH0729505A JPH0729505A JP16802193A JP16802193A JPH0729505A JP H0729505 A JPH0729505 A JP H0729505A JP 16802193 A JP16802193 A JP 16802193A JP 16802193 A JP16802193 A JP 16802193A JP H0729505 A JPH0729505 A JP H0729505A
- Authority
- JP
- Japan
- Prior art keywords
- shadow mask
- perforated
- curved surface
- ray tube
- area
- 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、カラー陰極線管にかか
わり、特に熱変形によるカラーピュリティ劣化を防止し
た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 more particularly to a shadow mask which prevents color purity deterioration due to thermal deformation.
【０００２】[0002]
【従来の技術】カラー映像の表示に用いる陰極線管（カ
ラー陰極線管）は、映像スクリーンであるパネル部、ネ
ック部およびパネル部とネック部とを連接するファンネ
ル部で構成される真空容器と、この真空容器の上記ネッ
ク部に電子銃が収容されると共に、上記パネル部に色選
択電極であるシャドウマスクが懸架されている。2. Description of the Related Art A cathode ray tube used for displaying a color image (color cathode ray tube) is a vacuum container composed of a panel portion which is an image screen, a neck portion, and a funnel portion connecting the panel portion and the neck portion. An electron gun is housed in the neck portion of the vacuum container, and a shadow mask as a color selection electrode is suspended on the panel portion.
【０００３】なお、上記パネル部の内面には少なくとも
３色の蛍光体が塗布され、また上記ファンネル部の内部
には上記シャドウマスクに接続した磁気シールドが内装
されている。電子銃から発射された３本の電子ビームは
ネック部とファンネル部の遷移領域に外装された偏向ヨ
ークで偏向され、シャドウマスクに形成された多数の開
孔を通過することにより色選別を受け、所定の蛍光体に
ランディングすることによってスクリーン上に映像を形
成する。At least three color phosphors are coated on the inner surface of the panel portion, and a magnetic shield connected to the shadow mask is provided inside the funnel portion. The three electron beams emitted from the electron gun are deflected by a deflection yoke mounted on the transition region of the neck portion and the funnel portion, pass through a large number of apertures formed in the shadow mask, and undergo color selection. An image is formed on the screen by landing on a predetermined phosphor.
【０００４】このシャドウマスクは弾性係数の低い低膨
張率合金の採用や、その曲面部を平面化して行く上で、
機械的強度を高める必要があると共に、熱変形によるピ
ュリティ劣化を防止するために様々な対策がなされてい
る。図４は従来のシャドウマスクの説明図であって、１
は有孔領域、２は無孔領域、３は曲面部、４はスカート
部、５，５’は凹状ビード、８は電子ビームが通過する
開孔である。In this shadow mask, a low expansion coefficient alloy having a low elastic coefficient is adopted, and the curved surface portion thereof is flattened.
It is necessary to increase mechanical strength, and various measures are taken to prevent deterioration of purity due to thermal deformation. FIG. 4 is an explanatory view of a conventional shadow mask.
Is a perforated region, 2 is a non-perforated region, 3 is a curved surface portion, 4 is a skirt portion, 5 and 5'are concave beads, and 8 is an opening through which an electron beam passes.
【０００５】なお、このシャドウマスクはスカート部４
を図示しないフレームに取付けられてその形状を保持し
てパネル部の内側壁に懸架される。同図（ａ）はシャド
ウマスクの平面図、（ｂ）は側面図、（ｃ）は（ａ）の
Ａ−Ａ線で切断した要部断面図であり、（ａ）の如く多
数の開孔８が所定の態様で配列形成された有孔領域１
と、この有孔領域１の周囲を取り囲む無孔領域２からな
る曲面部３と、（ｂ）のようにこの曲面部の無孔領域２
の外周に連接して枠状に折曲されたスカート部４とから
なる。The shadow mask has a skirt portion 4
Is attached to a frame (not shown) and the shape thereof is maintained and suspended on the inner wall of the panel portion. 7A is a plan view of the shadow mask, FIG. 8B is a side view, and FIG. 8C is a sectional view of a main part taken along the line AA of FIG. Perforated area 1 in which 8 are arranged in a predetermined manner
And a curved surface portion 3 composed of a non-perforated area 2 surrounding the perforated area 1, and a non-perforated area 2 of the curved surface portion as shown in (b).
And a skirt portion 4 which is connected to the outer periphery of the skirt and is bent in a frame shape.
【０００６】上記曲面部３の無孔領域２には、有孔領域
１を周回して略々平行な２本の凹状ビード５，５’が形
成されており、（ｃ）の断面図に示したように２本の凹
状ビード５，５’は同一の幅で上記有孔領域１を周回す
るごとく形成されている。このようなビードの形成によ
り、曲面部の機械的強度を確保することが可能となる。In the non-perforated area 2 of the curved surface portion 3, two substantially parallel concave beads 5 and 5'circulating the perforated area 1 are formed, which is shown in the sectional view of (c). As described above, the two concave beads 5 and 5'are formed with the same width so as to go around the perforated region 1. By forming such beads, it becomes possible to secure the mechanical strength of the curved surface portion.
【０００７】なお、この種のカラー陰極線管のシャドウ
マスクに関しては、特開平３−８８２４０号公報に開示
されている。A shadow mask for this type of color cathode ray tube is disclosed in Japanese Patent Laid-Open No. 3-88240.
【０００８】[0008]
【発明が解決しようとする課題】上記従来のカラー陰極
線管のシャドウマスクは、曲面部３の無孔領域２に、有
孔領域１を周回して略々平行かつ同一幅の２本の凹状ビ
ード５，５’を形成したことによって、機械的強度を向
上させることができる。しかし、シャドウマスクは、電
子ビームの射突で高温となり、特にその有孔領域が電子
ビームを多く受けるために、当該有孔領域の熱膨張が大
きく、一般的には有孔領域がパネル部側に接近する方向
に変形する，所謂ドーミング現象が生じる。The conventional shadow mask for a color cathode-ray tube described above has two concave beads, which are substantially parallel to each other in the non-perforated region 2 of the curved surface portion 3 around the perforated region 1 and have the same width. By forming 5, 5 ', mechanical strength can be improved. However, the shadow mask has a high temperature due to electron beam bombardment, and in particular, the perforated region receives a large amount of the electron beam, so that the perforated region has a large thermal expansion, and generally the perforated region is located on the panel side. A so-called doming phenomenon occurs, which deforms in the direction of approaching the.
【０００９】無孔領域に形成した従来のビードは、曲面
部の形状を機械的に維持する効果はあるが、熱膨張によ
る上記電子ビームの射突量の相違を考慮したものではな
いため、特に大サイズのシャドウマスクにおいては、変
形を十分に吸収できないという問題があった。本発明の
目的は、上記従来技術の問題を解消し、機械的強度を十
分に保持し、かつ電子ビームの射突による変形を十分に
防止できるようにしたカラー陰極線管のシャドウマスク
を提供することにある。The conventional bead formed in the non-perforated area has an effect of mechanically maintaining the shape of the curved surface portion, but it is not particularly considered because the difference in the amount of electron beam impingement due to thermal expansion is not taken into consideration. The large-sized shadow mask has a problem that it cannot absorb the deformation sufficiently. An object of the present invention is to provide a shadow mask for a color cathode ray tube which solves the above-mentioned problems of the prior art, can sufficiently maintain mechanical strength, and can sufficiently prevent deformation due to electron beam bombardment. It is in.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、多数の電子ビーム通過開孔を形成した有
孔領域と、この有孔領域の周囲を取り囲む無孔領域から
なる曲面部と、前記曲面部の無孔領域の外周に連接して
枠状に折曲されたスカート部とからなるカラー陰極線管
のシャドウマスクにおいて、前記無孔領域に、前記有孔
領域を周回する略々平行な２本の凹状ビードを有し、前
記２本の凹状ビードの前記有孔領域側の凹状ビードの幅
を前記スカート部側の凹状ビードの幅より大としたこと
を特徴とする。In order to achieve the above object, the present invention provides a curved surface composed of a perforated region having a large number of apertures for passing electron beams and a non-perforated region surrounding the perforated region. In a shadow mask of a color cathode ray tube comprising a skirt portion and a skirt portion which is connected to the outer periphery of the non-perforated area of the curved surface portion and is bent in a frame shape, the non-perforated area has a substantially circular shape surrounding the perforated area. Each of the two concave beads is parallel to each other, and the width of the concave bead of the two concave beads on the side of the perforated region is larger than the width of the concave bead on the side of the skirt portion.
【００１１】なお、上記の凹状ビードは２本に限るもの
ではなく、３本またはそれ以上としてもよい。また、凹
状形状は、断面が半円状、あるいは三角状、その他の形
状とすることができる。The number of the concave beads is not limited to two, but may be three or more. In addition, the concave shape may have a semicircular cross section, a triangular shape, or another shape.
【００１２】[0012]
【作用】上記本発明の構成としたことにより、有孔領域
側の凹状は面方向の変形を効果的に吸収して、曲面部が
パネル部方向に移動してピュリティの悪化が防止され
る。With the above-described structure of the present invention, the concave shape on the perforated area side effectively absorbs the deformation in the surface direction, and the curved surface portion is moved toward the panel portion to prevent deterioration of the purity.
【００１３】[0013]
【実施例】以下、本発明の実施例につき、図面を参照し
て詳細に説明する。図１は本発明によるカラー陰極線管
のシャドウマスクの１実施例の説明図であって、前記図
４と同一部分には同一符号を付している。なお、６は有
孔領域側の凹状ビード、６’はスカート部４側の凹状ビ
ード、７はフレームである。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an explanatory view of an embodiment of a shadow mask for a color cathode ray tube according to the present invention, in which the same parts as those in FIG. 4 are designated by the same reference numerals. 6 is a concave bead on the side of the perforated region, 6'is a concave bead on the side of the skirt portion 4, and 7 is a frame.
【００１４】同図において、（ａ）は平面図、（ｂ）は
（ａ）のＡ−Ａ線で切断した断面図であり、シャドウマ
スクはそのスカート部４をフレーム７にスポット溶接し
てシャドウマスク構体を構成する。シャドウマスクの無
孔部２には、有孔領域を周回する略々平行な２本の凹状
ビードが形成されており、その有孔部１側の凹状ビード
６とスカート部４側の凹状ビード６’の幅を異ならせ
る。In the figure, (a) is a plan view and (b) is a sectional view taken along the line A--A of (a). The shadow mask is spot-welded at its skirt portion 4 to the frame 7 for shadowing. Configure the mask structure. In the non-perforated portion 2 of the shadow mask, two substantially parallel concave beads that surround the perforated region are formed. The concave bead 6 on the perforated portion 1 side and the concave bead 6 on the skirt portion 4 side. The width of 'is different.
【００１５】図２は本発明によるカラー陰極線管のシャ
ドウマスクの１実施例の要部を説明する図１の（ａ）の
Ｂ−Ｂ線で切断した要部断面図である。同図に示したよ
うに、有孔領域１に近い方の凹状ビード６の幅Ｗ1 は、
スカート部4 に近い方の凹状ビード6'の幅Ｗ2 よりも大
きく（Ｗ1 ＞Ｗ2 ）形成されている。FIG. 2 is a sectional view taken along line BB in FIG. 1 (a) for explaining an essential part of a shadow mask for a color cathode ray tube according to the present invention. As shown in the figure, the width W 1 of the concave bead 6 closer to the perforated region 1 is
It is formed to have a width (W 1 > W 2 ) larger than the width W 2 of the concave bead 6 ′ closer to the skirt portion 4 .
【００１６】このような（Ｗ1 ＞Ｗ2 ）関係に２つの凹
状ビード６，６’を形成することによって、曲面部３の
機械的強度が向上されると共に、有孔領域１の膨張によ
る面方向の伸びを効果的に吸収してシャドウマスクがパ
ネル部方向に膨張してピュリティが劣化するのを抑止す
ることができる。なお、上記凹状ビードは２つに限るも
のではなく、３またはそれ以上とすることができる。By forming the two concave beads 6 and 6 ′ in such a relationship (W 1 > W 2 ), the mechanical strength of the curved surface portion 3 is improved and the surface of the perforated region 1 due to expansion is increased. It is possible to effectively absorb the extension in the direction and prevent the shadow mask from expanding in the panel portion direction and deteriorating the purity. The number of the concave beads is not limited to two, but may be three or more.
【００１７】さらに、凹状ビードの断面形状は、図示し
たような半円状に限るものではなく、断面三角状、ある
いはその他の形状（面方向の移動を吸収できる形状）で
あればよい。図３は本発明によるシャドウマスクを適用
したカラー陰極線管の一例を説明する断面図であって、
６，６’は前記本発明の実施例で説明した凹状ビード、
１０はパネル、１１は蛍光体、１２はマスクフレーム
（前記実施例のフレームに相当）、１３はシャドウマス
ク、１４は磁気シールド、１５はファンネル、１６はネ
ック、１７は電子銃、１８は陽極端子、１９は偏向ヨー
ク、２０はスタッドピン、２１は懸架スプリング、２２
は内部導電膜である。Further, the cross-sectional shape of the concave bead is not limited to the semi-circular shape shown in the figure, but may be a triangular cross-section or any other shape (shape capable of absorbing movement in the surface direction). FIG. 3 is a sectional view illustrating an example of a color cathode ray tube to which the shadow mask according to the present invention is applied,
6, 6'denotes the concave beads described in the embodiment of the present invention,
10 is a panel, 11 is a phosphor, 12 is a mask frame (corresponding to the frame of the above embodiment), 13 is a shadow mask, 14 is a magnetic shield, 15 is a funnel, 16 is a neck, 17 is an electron gun, 18 is an anode terminal. , 19 is a deflection yoke, 20 is a stud pin, 21 is a suspension spring, 22
Is an internal conductive film.
【００１８】この種のカラー陰極線管は、蛍光体１１を
内面に塗布したパネル１０と、電子銃１７を収容したネ
ック１６、およびパネル１０とネック１６を連接するフ
ァンネル１５とから真空容器を構成している。シャドウ
マスク４はマスクフレーム１２に固定されてシャドウマ
スク構体を構成し、このシャドウマスク構体を懸架スプ
リング２１でパネル１０の内側壁に植立したスタッドピ
ン２０に懸架支持して蛍光体１１に近接して配置され
る。In this type of color cathode ray tube, a vacuum container is composed of a panel 10 having an inner surface coated with a phosphor 11, a neck 16 accommodating an electron gun 17, and a funnel 15 connecting the panel 10 and the neck 16. ing. The shadow mask 4 is fixed to the mask frame 12 to form a shadow mask structure. The shadow mask structure is suspended and supported by a suspension spring 21 on a stud pin 20 that is erected on the inner wall of the panel 10, and is close to the phosphor 11. Are arranged.
【００１９】マスクフレーム１２には磁気シールド１４
が固定され、ファンネル内に延在して電子ビームに対し
て外部磁界を遮断する。ネック１６とファンネル１５の
遷移部分の外部には偏向ヨーク１９が装架されており、
電子銃１７から発射した電子ビームを水平と垂直の２方
向に偏向し、蛍光体１１上に映像を再生する。A magnetic shield 14 is provided on the mask frame 12.
Is fixed and extends into the funnel to block the external magnetic field for the electron beam. A deflection yoke 19 is mounted outside the transition portion between the neck 16 and the funnel 15.
The electron beam emitted from the electron gun 17 is deflected in two directions, horizontal and vertical, to reproduce an image on the phosphor 11.
【００２０】上記シャドウマスク１３は、前記実施例で
説明したように、その有孔領域を取り巻く無孔領域に幅
の異なる２つの凹状ビード６，６’が形成されている。
この構成により、シャドウマスク１３に射突する電子ビ
ームによって発生する熱に起因して生じるシャドウマス
ク１３の面方向の伸びを上記幅の異なる２つの凹状ビー
ド６，６’を備えた無孔領域で吸収し、上記加熱による
シャドウマスク１３の所謂ドーミング現象を阻止し、良
好なピュリティのカラー表示を得ることができる。As described in the above embodiment, the shadow mask 13 has two concave beads 6 and 6'having different widths formed in the non-perforated region surrounding the perforated region.
With this configuration, the expansion in the surface direction of the shadow mask 13 caused by the heat generated by the electron beam impinging on the shadow mask 13 is achieved in the non-hole region provided with the two concave beads 6 and 6 ′ having different widths. It is possible to prevent the so-called doming phenomenon of the shadow mask 13 due to the absorption by heating and to obtain a color display with good purity.
【００２１】[0021]
【発明の効果】以上説明したように、本発明によれば、
シャドウマスクの機械的強度（剛性）を向上させると共
に、シャドウマスクの有孔領域の変形を回避して良好な
カラー映像の表示を行うことのできるカラー陰極線管を
提供できる。As described above, according to the present invention,
It is possible to provide a color cathode ray tube capable of improving the mechanical strength (rigidity) of the shadow mask and avoiding the deformation of the perforated area of the shadow mask to display a good color image.
【図１】本発明によるカラー陰極線管のシャドウマスク
の１実施例の説明図である。FIG. 1 is an explanatory view of one embodiment of a shadow mask of a color cathode ray tube according to the present invention.
【図２】本発明によるカラー陰極線管のシャドウマスク
の１実施例の要部を説明する図１の（ａ）のＢ−Ｂ線で
切断した要部断面図である。FIG. 2 is a sectional view taken along line BB of FIG. 1A for explaining an essential part of one embodiment of a shadow mask for a color cathode ray tube according to the present invention.
【図３】本発明によるシャドウマスクを適用したカラー
陰極線管の一例を説明する断面図である。FIG. 3 is a sectional view illustrating an example of a color cathode ray tube to which a shadow mask according to the present invention is applied.
【図４】従来のシャドウマスクの説明図である。FIG. 4 is an explanatory diagram of a conventional shadow mask.
１ 有孔領域 ２ 無孔領域 ３ 曲面部 ４ スカート部 ６，６’ 凹状ビード ７ フレーム ８ 電子ビームが通過する開孔。 1 Perforated region 2 Non-perforated region 3 Curved part 4 Skirt part 6, 6'Concave bead 7 Frame 8 Open hole through which an electron beam passes.
Claims (1)
領域と、この有孔領域の周囲を取り囲む無孔領域からな
る曲面部と、前記曲面部の無孔領域の外周に連接して枠
状に折曲されたスカート部とからなるカラー陰極線管の
シャドウマスクにおいて、 前記無孔領域に、前記有孔領域を周回する略々平行な２
本の凹状ビードを有し、前記２本の凹状ビードの前記有
孔領域側の凹状ビードの幅を前記スカート部側の凹状ビ
ードの幅より大としたことを特徴とするカラー陰極線管
のシャドウマスク。1. A curved surface portion comprising a perforated region having a large number of electron beam passing apertures, a non-perforated region surrounding the perforated region, and an outer periphery of the non-perforated region of the curved surface portion. A shadow mask for a color cathode ray tube comprising a skirt portion bent in a frame shape, wherein the non-perforated area is substantially parallel to the perforated area.
Shadow mask for a color cathode ray tube having two concave beads, wherein the width of the concave beads of the two concave beads on the side of the perforated region is larger than the width of the concave beads on the side of the skirt portion. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16802193A JPH0729505A (en) | 1993-07-07 | 1993-07-07 | Shadow mask for color cathode-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16802193A JPH0729505A (en) | 1993-07-07 | 1993-07-07 | Shadow mask for color cathode-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0729505A true JPH0729505A (en) | 1995-01-31 |
Family
ID=15860343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16802193A Pending JPH0729505A (en) | 1993-07-07 | 1993-07-07 | Shadow mask for color cathode-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0729505A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19757357C2 (en) * | 1996-12-30 | 2001-12-06 | Samsung Display Devices Co Ltd | Shadow mask assembly for a color cathode ray tube |
| KR100365524B1 (en) * | 2000-08-29 | 2002-12-18 | 엘지마이크론 주식회사 | Shadow mask having bead and manufacturing method thereof |
| KR100387431B1 (en) * | 2000-08-29 | 2003-06-18 | 엘지마이크론 주식회사 | Shadow mask having dimple and manufacturing method thereof |
| 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 |
-
1993
- 1993-07-07 JP JP16802193A patent/JPH0729505A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19757357C2 (en) * | 1996-12-30 | 2001-12-06 | Samsung Display Devices Co Ltd | Shadow mask assembly for a color cathode ray tube |
| KR100365524B1 (en) * | 2000-08-29 | 2002-12-18 | 엘지마이크론 주식회사 | Shadow mask having bead and manufacturing method thereof |
| KR100387431B1 (en) * | 2000-08-29 | 2003-06-18 | 엘지마이크론 주식회사 | Shadow mask having dimple and manufacturing method thereof |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3803436A (en) | Shadow mask mounting assemblies | |
| JP3300229B2 (en) | Color picture tube with shadow mask with improved aperture spacing | |
| US4056755A (en) | Color picture tube having mask-frame assembly with reduced thickness | |
| CA1283440C (en) | Cathode-ray tube having shadow mask for low overscan | |
| JPH08298078A (en) | Color picture tube | |
| US4122368A (en) | Cathode ray tube with a corrugated mask having a corrugated skirt | |
| JPH0729505A (en) | Shadow mask for color cathode-ray tube | |
| KR970007527B1 (en) | Color cathode ray tube | |
| US4739216A (en) | Color picture tube having a shadow mask mounted under compressive stress in a support frame | |
| KR20000035225A (en) | Color cathode ray tube | |
| US6518695B2 (en) | Mask-frame assembly for cathode ray tube | |
| KR940008155Y1 (en) | Shadow mask flame assembling apparatus for c-crt | |
| JPH10144227A (en) | Color cathode-ray tube having shadow mask | |
| JPH0773816A (en) | Shadow mask for color crt | |
| KR200193435Y1 (en) | Attachment Structure of Mask Frame and Shadow Mask for Color Cathode Ray Tube | |
| US3868532A (en) | Shadow mask and overscan shield assembly | |
| KR100472516B1 (en) | Cathode ray tube | |
| KR100318386B1 (en) | Mask assembly for cathode ray tube | |
| JP2003346677A (en) | Mask frame for cathode-ray tube | |
| JPH059895B2 (en) | ||
| JP2005500657A (en) | Cathode ray tube with detenting mask support frame | |
| KR100291794B1 (en) | Mask assembly for cathode ray tube | |
| KR100360503B1 (en) | Color cathode-ray tube with expanded effective display area | |
| EP0335606B1 (en) | Color picture tube having improved shadow mask-frame assembly | |
| KR200147274Y1 (en) | Shadow mask of crt |