JP3501204B2 - Funnel for cathode ray tube - Google Patents
Funnel for cathode ray tubeInfo
- Publication number
- JP3501204B2 JP3501204B2 JP29772397A JP29772397A JP3501204B2 JP 3501204 B2 JP3501204 B2 JP 3501204B2 JP 29772397 A JP29772397 A JP 29772397A JP 29772397 A JP29772397 A JP 29772397A JP 3501204 B2 JP3501204 B2 JP 3501204B2
- Authority
- JP
- Japan
- Prior art keywords
- funnel
- axis
- thickness
- cathode ray
- ray tube
- 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.)
- Expired - Fee Related
Links
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、陰極線管用ファンネル
に関するものである。
【０００２】
【従来の技術】陰極線管用ファンネルは、画像が映し出
される略矩形のパネルが接合されるための広開口端部
と、電子銃が挿入されるネック管が接合されるための狭
開口端部とを有し、パネル及びネック管がファンネルに
接合されることにより陰極線管用バルブになる。
【０００３】陰極線管の作動時には、ネック管内の電子
銃から発射される電子ビームをパネル内面に当てること
により画像が映し出されることから、陰極線管用ファン
ネルの狭開口端部側の外方には、電子ビームを偏向させ
るための偏向ヨークが取り付けられる。
【０００４】しかるに、電子ビームを偏向させる際、特
に略矩形のパネルの隅角部に当てる電子ビームは陰極線
管用ファンネルのヨーク取付部の内壁が支障となってパ
ネルに到達せず、所謂ネックシャドウという現象を呈
し、所期の画像が得られないという問題を生じる。
【０００５】そこで従来では、例えば、パネルの隅角部
に当てる電子ビームが通過するための凹溝をヨーク取付
部の内壁に形成した陰極線管用ファンネルが提案されて
いる。
【０００６】
【発明が解決しようとする課題】しかしながら、上記陰
極線管用フアンネルにあっては、凹溝部のみが局部的に
薄肉化されていることから機械的強度が著しく劣化する
という問題がある。即ち、陰極線管用バルブが陰極線管
として使用される際には、その内部を排気され、真空容
器として使用されることから、常時大気圧による応力が
負荷された状態にあり、これに耐え得るための十分な機
械的強度が必要となる。特に、上記ファンネルのヨーク
取付部は陰極線管の破壊原因を生じやすい領域の１つで
あり、かかる部分に局部的な薄肉部が形成されることは
強度上の問題を生じることになる。また、斯様な局部的
な薄肉部を有するファンネルは成型し難いだけでなく、
例えば、チューブ工程におけるファンネル内壁へのダグ
（導電膜）形成時においても、該凹溝部にダグ溜まりが
生じたり、導電膜を塗布し難いといった問題がある。
【０００７】そこで、本発明の目的は、ヨーク取付部の
機械的強度を劣化させることなく、広角偏向される電子
ビームを良好にして通過させることができ、しかも生産
性の良い陰極線管用ファンネルを提供することである。
【０００８】
【課題を解決するための手段】本発明は、上記の課題及
び目的に鑑みてなされたもので、略矩形のパネルが接合
される広開口端部とネック管が接合される狭開口端部と
を有する漏斗形状のファンネルにおいて、偏向ヨークが
取り付けられるヨーク取付部の外輪郭は略矩形であり、
その内輪郭は相対向する辺の中央部が内側に膨らんだ電
子ビーム群の通過形状と概ね相似の形状を呈する湾曲形
であり、且つ外輪郭と内輪郭との間の対角軸ＤＡ上の肉
厚ＴＤ、水平軸ＨＡ上の肉厚ＴＨ、垂直軸ＶＡ上の肉厚
ＴＶが、ＴＤ＜ＴＨ且つＴＤ＜ＴＶの関係を有し、前記
ヨーク取付部の水平軸ＨＡを０°、垂直軸ＶＡを９０
°、対角軸ＤＡと水平軸ＨＡとのなす角度をＤθとし
て、角度θにおける肉厚Ｔは、０＜θ＜ＤθにおいてＴ
Ｈ＋（ＴＤ−ＴＨ）（θ／Ｄθ） X 、Ｄθ＜θ＜９０に
おいてＴＶ＋（ＴＤ−ＴＶ）［（９０−θ）／（９０−
Ｄθ）］ X 、（但し１＜Ｘ≦８）によって規定されてな
ることを特徴とする陰極線管用ファンネルである。
【０００９】
【００１０】
【作用】本発明の陰極線管用ファンネルにおいては、偏
向ヨークが取り付けられるヨーク取付部の外輪郭は略矩
形であり、その内輪郭は相対向する辺の中央部が内側に
膨らんだ湾曲形であり、且つ外輪郭と内輪郭との間の対
角軸ＤＡ上の肉厚ＴＤ、水平軸ＨＡ上の肉厚ＴＨ、垂直
軸ＶＡ上の肉厚ＴＶが、ＴＤ＜ＴＨ且つＴＤ＜ＴＶの関
係を有してなることにより、ヨーク取付部の内輪郭は、
ヨーク取付部における電子ビーム群の通過形状と概ね相
似の形状を呈し、しかも最も広角偏向される電子ビーム
が通過するヨーク取付部の隅角部の肉厚を薄くすること
で電子ビームの通過を妨げることなく、且つ前記隅角部
から水平軸上、垂直軸上に向けて肉厚を厚肉化すること
でヨーク取付部において必要とされる機械的強度を維持
している。
【００１１】また、本発明においては、前記ヨーク取付
部の水平軸ＨＡを０゜、垂直軸ＶＡを９０゜、対角軸Ｄ
Ａと水平軸ＨＡとのなす角度をＤθとして、角度θにお
ける肉厚Ｔは、０＜θ＜ＤθにおいてＴＨ＋（ＴＤ−Ｔ
Ｈ）（θ／Ｄθ）X 、Ｄθ＜θ＜９０においてＴＶ＋
（ＴＤ−ＴＶ）［（９０−θ）／（９０−Ｄθ）］X 、
（但し１＜Ｘ≦８）によって規定されていることによ
り、特にヨーク取付部の対角軸上の薄肉部が極端にくび
れた凹溝形状を呈しない内輪郭となり、対角軸上の薄肉
部と水平軸上及び垂直軸上の厚肉部とが滑らかな湾曲形
を呈する。
【００１２】
【実施例】以下実施例に基づいて本発明の陰極線管用フ
ァンネルについて説明する。
【００１３】図１は本発明による陰極線管用ファンネル
１の説明図、図２は図１のＡ−Ａにおける拡大断面図で
ある。
【００１４】陰極線管用ファンネル１は略矩形のパネル
が接合されるための広開口端部１ａとネック管が接合さ
れるための狭開口端部１ｂとを有している。偏向ヨーク
が取り付けられるヨーク取付部１ｃについては、図２に
示すように、その外輪郭は略矩形であり、内輪郭は相対
向する辺の中央部が内側に膨らんだ湾曲形であり、ヨー
ク取付部１の外輪郭と内輪郭との対角軸ＤＡ上の肉厚Ｔ
Ｄ、水平軸ＨＡ上の肉厚ＴＨ、垂直軸ＶＡ上の肉厚ＴＶ
は、各々ＴＤ＝２．７ｍｍ、ＴＨ＝３．６ｍｍ、ＴＶ＝
４．０ｍｍに形成してある。
【００１５】内輪郭の湾曲形は、下記の条件を満足する
ことにより得られるものである。
【００１６】図３は、上記ヨーク取付部１ｃにおける１
／４領域を拡大して示しており、ここでヨーク取付部１
ｃの水平軸ＨＡを０゜、垂直軸ＶＡを９０゜、対角軸Ｄ
Ａと水平軸ＨＡとのなす角度をＤθとし、角度θにおけ
る軸とヨーク取付部１ｃの外輪郭との交点Ｂから内輪郭
までの垂線の距離を肉厚Ｔとすると、肉厚Ｔは０＜θ＜
ＤθにおいてＴＨ＋（ＴＤ−ＴＨ）（θ／Ｄθ）X 、Ｄ
θ＜θ＜９０においてＴＶ＋（ＴＤ−ＴＶ）［（９０−
θ）／（９０−Ｄθ）］X 、（但し１＜Ｘ≦８）によっ
て規定されることにより、上記の対角軸ＤＡ上の肉厚Ｔ
Ｄ、水平軸上ＨＡ上の肉厚ＴＨ及び垂直軸ＶＡ上の肉厚
ＴＶの値を維持しながら、内輪郭が滑らかな湾曲形を呈
する。ここで上記条件式中の乗数が大きい程、内輪郭の
湾曲形の対角軸ＤＡ付近のくびれ量、即ち対角軸ＤＡ付
近の薄肉化が大きくなることを意味するが、乗数が１の
場合には前記内輪郭が湾曲形を呈せず、また乗数が８よ
り大きいと、対角軸ＤＡ付近の薄肉部が極端にくびれた
凹溝形状を呈することになる。
【００１７】本実施例において、Ｄθは３６．８７°で
あり、各角度θにおける肉厚Ｔは、角度θが０＜θ＜３
６．８７のときＴＨ＋（ＴＤ−ＴＨ）（θ／３６．８
７）2、３６．８７＜θ＜９０のときＴＶ＋（ＴＤ−Ｔ
Ｖ）［（９０−θ）／（９０−３６．８７）］2 により
規定されている。
【００１８】斯様な条件に基づいてヨーク取付部１ｃの
肉厚Ｔが変化している陰極線管用ファンネルは、ヨーク
取付部１ｃにおける対角軸ＤＡ上の肉厚ＴＤ、水平軸Ｈ
Ａ上肉厚ＴＨ及び垂直軸ＶＡ上の肉厚ＴＶが、ＴＤ＜Ｔ
Ｈ且つＴＤ＜ＴＡの関係にありながら、その内輪郭は滑
らかな湾曲形を呈し、これによって電子ビームの通過を
妨げることなく、また、ヨーク取付部１ｃに必要とされ
る機械的強度を維持することができる。
【００１９】
【発明の効果】以上説明したように、本発明の陰極線管
用ファンネルによれば、ヨーク取付部の機械的強度を劣
化させることなく、広角偏向される電子ビームを良好に
して通過させることができ、しかも生産性にも寄与し得
るという優れた効果を奏する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a funnel for a cathode ray tube. 2. Description of the Related Art A cathode ray tube funnel has a wide opening end for joining a substantially rectangular panel on which an image is projected and a narrow opening end for joining a neck tube into which an electron gun is inserted. And a panel and a neck tube are joined to the funnel to form a cathode ray tube bulb. During operation of the cathode ray tube, an image is displayed by applying an electron beam emitted from an electron gun in the neck tube to the inner surface of the panel. A deflection yoke for deflecting the beam is mounted. However, when deflecting the electron beam, the electron beam hitting the corner portion of the substantially rectangular panel does not reach the panel because the inner wall of the yoke mounting portion of the funnel for the cathode ray tube is hindered, and is called a so-called neck shadow. This causes a problem that a desired image cannot be obtained. Therefore, conventionally, for example, there has been proposed a funnel for a cathode ray tube in which a concave groove through which an electron beam hitting a corner of a panel passes is formed on an inner wall of a yoke mounting portion. [0006] However, in the above-mentioned cathode ray tube funnel, there is a problem that the mechanical strength is remarkably deteriorated because only the concave groove portion is locally thinned. That is, when the cathode ray tube bulb is used as a cathode ray tube, the inside thereof is evacuated and used as a vacuum vessel, so that it is always in a state of being stressed by the atmospheric pressure, and to withstand this. Sufficient mechanical strength is required. In particular, the yoke mounting portion of the funnel is one of the regions where the cause of destruction of the cathode ray tube is likely to occur, and the formation of a local thin portion in such a portion causes a problem in strength. In addition, such a funnel having a local thin portion is not only difficult to mold,
For example, when a doug (conductive film) is formed on the inner wall of the funnel in the tube process, there is a problem that the dough is accumulated in the concave groove portion and it is difficult to apply the conductive film. SUMMARY OF THE INVENTION An object of the present invention is to provide a funnel for a cathode ray tube which can pass an electron beam which is deflected at a wide angle in a favorable state without deteriorating the mechanical strength of a yoke mounting portion and which has high productivity. It is to be. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems and objects, and has a wide opening end to which a substantially rectangular panel is joined and a narrow opening to which a neck tube is joined. In a funnel-shaped funnel having an end, an outer contour of a yoke mounting portion to which a deflection yoke is mounted is substantially rectangular,
Central part electrostatic bulging inward sides thereof the inner contour of opposing
A curved shape having a shape substantially similar to the passing shape of the daughter beam group , and a thickness TD on the diagonal axis DA, a thickness TH on the horizontal axis HA, and a vertical axis VA between the outer contour and the inner contour. the thickness of the upper TV has a TD <TH and TD <TV relationship, the
The horizontal axis HA of the yoke mounting part is 0 °, and the vertical axis VA is 90
°, the angle between the diagonal axis DA and the horizontal axis HA is Dθ
Therefore, the thickness T at the angle θ is T <0 at 0 <θ <Dθ.
H + (TD−TH) (θ / Dθ) X , Dθ <θ <90
TV + (TD−TV) [(90−θ) / (90−
Dθ)] X , wherein 1 <X ≦ 8, which is a funnel for a cathode ray tube. In the funnel for a cathode ray tube according to the present invention, the outer contour of the yoke attaching portion to which the deflection yoke is attached is substantially rectangular, and the inner contour thereof is such that the center of opposing sides bulges inward. The thickness TD on the diagonal axis DA, the thickness TH on the horizontal axis HA, and the thickness TV on the vertical axis VA between the outer contour and the inner contour are TD <TH and TD <By having the relationship of TV, the inner contour of the yoke mounting portion is
It has a shape substantially similar to the passing shape of the electron beam group at the yoke mounting portion, and furthermore, prevents the passage of the electron beam by reducing the thickness of the corner portion of the yoke mounting portion through which the most wide-deflected electron beam passes. The mechanical strength required at the yoke mounting portion is maintained without increasing the thickness from the corners toward the horizontal axis and the vertical axis. Also, in the present invention, the horizontal axis HA of the yoke mounting portion is 0 °, the vertical axis VA is 90 °, and the diagonal axis D is
Assuming that the angle between A and the horizontal axis HA is Dθ, the thickness T at the angle θ is TH + (TD−T−0) at 0 <θ <Dθ.
H) (θ / Dθ) X , TV + when Dθ <θ <90
(TD-TV) [(90-θ) / (90-Dθ)] X ,
(Where 1 <X ≦ 8), the thin portion on the diagonal axis of the yoke mounting portion particularly has an inner contour not exhibiting an extremely narrow groove, and the thin portion on the diagonal axis. And the thick portions on the horizontal axis and the vertical axis have a smooth curved shape. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will now be given of a funnel for a cathode ray tube according to the present invention based on embodiments. FIG. 1 is an explanatory view of a funnel 1 for a cathode ray tube according to the present invention, and FIG. 2 is an enlarged sectional view taken along line AA of FIG. The cathode ray tube funnel 1 has a wide opening end 1a for joining a substantially rectangular panel and a narrow opening end 1b for joining a neck tube. As shown in FIG. 2, the yoke mounting portion 1c to which the deflection yoke is mounted has an outer contour that is substantially rectangular, and an inner contour that is a curved shape in which the center of opposing sides swells inward. Thickness T on the diagonal axis DA between the outer contour and the inner contour of the part 1
D, thickness TH on horizontal axis HA, thickness TV on vertical axis VA
Are respectively TD = 2.7 mm, TH = 3.6 mm, TV =
It is formed to 4.0 mm. The curved shape of the inner contour is obtained by satisfying the following conditions. FIG. 3 is a sectional view of the yoke mounting portion 1c.
/ 4 area is shown in an enlarged manner, and here, the yoke mounting portion 1 is shown.
The horizontal axis HA of c is 0 °, the vertical axis VA is 90 °, and the diagonal axis D is
Assuming that the angle between A and the horizontal axis HA is Dθ, and the perpendicular distance from the intersection B between the axis and the outer contour of the yoke mounting portion 1c to the inner contour at the angle θ is thickness T, the thickness T is 0 < θ <
In Dθ, TH + (TD−TH) (θ / Dθ) X , D
When θ <θ <90, TV + (TD−TV) [(90−
θ) / (90−Dθ)] X , where 1 <X ≦ 8, so that the thickness T on the diagonal axis DA described above.
D, while maintaining the values of the thickness TH on the horizontal axis HA and the thickness TV on the vertical axis VA, the inner contour exhibits a smooth curved shape. Here, the larger the multiplier in the above conditional expression, the larger the constriction amount near the diagonal axis DA of the curved inner contour, that is, the greater the thinning near the diagonal axis DA, but when the multiplier is 1 If the inner contour does not exhibit a curved shape, and if the multiplier is greater than 8, the thin portion near the diagonal axis DA exhibits an extremely narrow groove shape. In the present embodiment, Dθ is 36.87 °, and the thickness T at each angle θ is such that the angle θ is 0 <θ <3.
At the time of 6.87, TH + (TD−TH) (θ / 36.8)
7) 2, 36.87 <θ <time of 90 TV + (TD-T
V) [(90−θ) / (90−36.87)] 2 . The funnel for a cathode ray tube in which the thickness T of the yoke mounting portion 1c is changed based on such conditions, the thickness TD of the yoke mounting portion 1c on the diagonal axis DA and the horizontal axis H
The thickness TH on A and the thickness TV on the vertical axis VA are TD <T
Despite the relationship of H and TD <TA, the inner contour has a smooth curved shape, so that the passage of the electron beam is not hindered and the mechanical strength required for the yoke mounting portion 1c is maintained. be able to. As described above, according to the cathode ray tube funnel of the present invention, it is possible to pass an electron beam which is deflected at a wide angle in a favorable state without deteriorating the mechanical strength of the yoke mounting portion. And also contributes to productivity.
【図面の簡単な説明】
【図１】本発明にかかる陰極線管用ファンネルの説明図
である。
【図２】図１のＡ−Ａにおける拡大断面図である。
【図３】ヨーク取付部における肉厚分布の説明図であ
る。
【符号の説明】
１ 陰極線管用ファンネル
１ａ 広開口端部
１ｂ 狭開口端部
１ｃ ヨーク取付部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a funnel for a cathode ray tube according to the present invention. FIG. 2 is an enlarged sectional view taken along line AA of FIG. FIG. 3 is an explanatory diagram of a thickness distribution in a yoke mounting portion. [Description of Signs] 1 Funnel for cathode ray tube 1a Wide opening end 1b Narrow opening end 1c Yoke mounting portion
Claims (1)
とネック管が接合される狭開口端部とを有する漏斗形状
のファンネルにおいて、偏向ヨークが取り付けられるヨ
ーク取付部の外輪郭は略矩形であり、その内輪郭は相対
向する辺の中央部が内側に膨らんだ電子ビーム群の通過
形状と概ね相似の形状を呈する湾曲形であり、且つ外輪
郭と内輪郭との間の対角軸ＤＡ上の肉厚ＴＤ、水平軸Ｈ
Ａ上の肉厚ＴＨ、垂直軸ＶＡ上の肉厚ＴＶが、ＴＤ＜Ｔ
Ｈ且つＴＤ＜ＴＶの関係を有し、前記ヨーク取付部の水
平軸ＨＡを０°、垂直軸ＶＡを９０°、対角軸ＤＡと水
平軸ＨＡとのなす角度をＤθとして、角度θにおける肉
厚Ｔは、０＜θ＜ＤθにおいてＴＨ＋（ＴＤ−ＴＨ）
（θ／Ｄθ） X 、Ｄθ＜θ＜９０においてＴＶ＋（ＴＤ
−ＴＶ）［（９０−θ）／（９０−Ｄθ）］ X 、（但し
１＜Ｘ≦８）によって規定されてなることを特徴とする
陰極線管用ファンネル。(57) [Claim 1] In a funnel-shaped funnel having a wide opening end to which a substantially rectangular panel is joined and a narrow opening end to which a neck tube is joined, a deflection yoke is attached. The outer contour of the yoke mounting part is substantially rectangular, and the inner contour is the passage of the electron beam group whose central part of the opposing sides swells inward.
A curved shape having a shape substantially similar to the shape , and a thickness TD on a diagonal axis DA between the outer contour and the inner contour, and a horizontal axis H
A on the vertical axis VA and the thickness TV on the vertical axis VA, TD <T
H and TD <TV, and the water in the yoke mounting portion
Flat axis HA is 0 °, vertical axis VA is 90 °, diagonal axis DA and water
The angle at the angle θ with respect to the flat axis HA is Dθ.
The thickness T is TH + (TD−TH) at 0 <θ <Dθ.
(Θ / Dθ) X , TV + (TD
−TV) [(90−θ) / (90−Dθ)] X , (however,
1 <X ≦ 8) A funnel for a cathode ray tube characterized by the following formula:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29772397A JP3501204B2 (en) | 1997-10-14 | 1997-10-14 | Funnel for cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29772397A JP3501204B2 (en) | 1997-10-14 | 1997-10-14 | Funnel for cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11120939A JPH11120939A (en) | 1999-04-30 |
| JP3501204B2 true JP3501204B2 (en) | 2004-03-02 |
Family
ID=17850353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29772397A Expired - Fee Related JP3501204B2 (en) | 1997-10-14 | 1997-10-14 | Funnel for cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3501204B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001084925A (en) * | 1999-09-13 | 2001-03-30 | Mitsubishi Electric Corp | Cathode-ray tube |
| JP3591531B2 (en) | 2001-12-25 | 2004-11-24 | 日本電気硝子株式会社 | Funnel for cathode ray tube |
| KR100426571B1 (en) * | 2002-03-07 | 2004-04-14 | 엘지.필립스디스플레이(주) | A Funnel Structure of The Cathode-Ray-Tube |
| KR100434409B1 (en) * | 2002-05-29 | 2004-06-04 | 엘지.필립스디스플레이(주) | Structure for cathode ray tube |
| KR100502465B1 (en) * | 2002-06-21 | 2005-07-20 | 엘지.필립스 디스플레이 주식회사 | Crt |
| DE10228679B4 (en) * | 2002-06-27 | 2006-08-03 | Schott Ag | Funnels for cathode ray tubes |
-
1997
- 1997-10-14 JP JP29772397A patent/JP3501204B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11120939A (en) | 1999-04-30 |
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Legal Events
| Date | Code | Title | Description |
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| A61 | First payment of annual fees (during grant procedure) |
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| LAPS | Cancellation because of no payment of annual fees |