JPS6028139A - Electron gun for color picture tube - Google Patents
Electron gun for color picture tubeInfo
- Publication number
- JPS6028139A JPS6028139A JP13431083A JP13431083A JPS6028139A JP S6028139 A JPS6028139 A JP S6028139A JP 13431083 A JP13431083 A JP 13431083A JP 13431083 A JP13431083 A JP 13431083A JP S6028139 A JPS6028139 A JP S6028139A
- Authority
- JP
- Japan
- Prior art keywords
- shaped electrode
- electrode
- electrode element
- diameter
- electron beams
- 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
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
- H01J29/503—Three or more guns, the axes of which lay in a common plane
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はカラー受像管用電子銃に関し、特に主レンズを
構成する電極に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an electron gun for a color picture tube, and more particularly to an electrode constituting a main lens.
第１図は従来の電子銃を備えたカラー受像管の断面図で
ある。図において、ガラス外囲器１のフェースプレート
部２の内壁に３色のけい光体を交互にストライプ状に塗
布したけい光面３が形成され、このけい光面と対向して
陰極４，５．６が設けられている。陰極４，５．６の中
心軸７，８゜９はＧ１電極１０、Ｇ２電極１１、主レン
ズを構成する９３電極１２および遮へいカップ１３の各
陰極に対応する開口部ならびにＧ３電極１２が有する円
筒１４，１５．１６の中心軸と一致している。FIG. 1 is a sectional view of a color picture tube equipped with a conventional electron gun. In the figure, a phosphor surface 3 is formed on the inner wall of a face plate portion 2 of a glass envelope 1, and a phosphor surface 3 is formed by applying phosphors of three colors alternately in stripes. .6 is provided. The central axes 7 and 8°9 of the cathodes 4 and 5.6 correspond to the openings corresponding to the G1 electrode 10, the G2 electrode 11, the 93 electrodes 12 constituting the main lens, and the shielding cup 13, and the cylinder that the G3 electrode 12 has. 14, 15, and 16.
主レンズを構成するもう一方の電極であるＧト電極１１
が有する中央の円筒１８の中心軸は、中心軸８に一致し
ているが、外側の円筒１９．２０の中心軸２１．２２は
それぞれ対応する中心軸Ｔ、９よ・シわずかに外側に変
位している。G electrode 11, which is the other electrode constituting the main lens
The central axis of the central cylinder 18 coincides with the central axis 8, but the central axes 21, 22 of the outer cylinders 19, 20 are slightly displaced outward from the corresponding central axis T, 9, respectively. are doing.
上記構成において、各陰極から射出される３本の電子ビ
ームは、中心軸７，８．９に沿って主レンズに入射する
。Ｇ３電極１２は、Ｇ４電極１７よシも低電位に設定さ
れ、高電位の０４電極１７は遮へいカップ１３およびガ
ラス外囲器１の内壁に設けられた導電膜２３と同電位に
なっている。In the above configuration, three electron beams emitted from each cathode are incident on the main lens along the central axis 7, 8.9. The G3 electrode 12 and the G4 electrode 17 are also set at a low potential, and the high potential 04 electrode 17 is at the same potential as the shielding cup 13 and the conductive film 23 provided on the inner wall of the glass envelope 1.
Ｇ３．Ｇ４両電極の中央の円筒１５．１８は同軸であシ
、またこれらの円筒が非軸対称の電極外周部からの影響
を打ち消すため、中央に形成される主レンズは軸対称と
なり、中央ビームは主レンズによって集束された後、軸
に沿った軌道を直進する。G3. The cylinders 15 and 18 at the center of both G4 electrodes are coaxial, and because these cylinders cancel out the influence from the non-axisymmetric electrode outer periphery, the main lens formed in the center is axially symmetrical, and the central beam is After being focused by the main lens, it travels straight along a trajectory along the axis.
これに対し両電極の外側の円筒１４と１９おおび１６と
２０は互いに軸がずれているために非軸対称の主レンズ
を形成し、外側ビームはＧ４電極側に形成される発散レ
ンズ領域でレンズ中心軸より中央寄シの部分を通過し、
集束作用と同時に中央ビーム方向への集中力を受ける。On the other hand, the outer cylinders 14 and 19 and 16 and 20 of both electrodes form a non-axisymmetric main lens because their axes are shifted from each other, and the outer beam is a diverging lens region formed on the G4 electrode side. Passes through the part closer to the center than the center axis of the lens,
At the same time as the focusing action, it receives a concentrated force in the direction of the central beam.
この結果、３本の電子ビームはシャドウマスク２４の上
で結像すると同時に互いに重なシ合うように集中する。As a result, the three electron beams form an image on the shadow mask 24 and at the same time are concentrated so as to overlap each other.
この集中操作が静コンバーゼン？である。さらに各電子
ビームはシャドウマスク２４によシ色選別を受け、各ビ
ームに対、応する色のけい光体を励起発光させる成分だ
けがその開口を通過してけい光面３に至る。また、電子
ビームをけい光面上で走査するため、外部磁気偏向ヨー
ク２５が設けられている。Is this concentrated operation a static convergen? It is. Further, each electron beam is subjected to color selection by a shadow mask 24, and only the component of each beam that excites the phosphor of the corresponding color to emit light passes through the aperture and reaches the phosphor surface 3. Further, an external magnetic deflection yoke 25 is provided to scan the electron beam on the phosphorescent surface.
このような構成のカラー受像管において、フォーカス品
質を向上させる手段としてＧ３．Ｇ４電極が有する３個
のビーム通過円筒の径、すなわち主レンズ口径を大きく
することは知られている。これは電子銃の倍率、球面収
差および電子相互反発力によるビームスポットの増大を
低減させることにな、！ｌｌｌ有効な方法である。その
場合主レンズ口径はフォーカスコンバーゼンス、高圧特
性および電極の加工性等から総合的に判断して許される
範囲でできる限シ大きく決められる。主レンズ口径をさ
らに大きくする場合には、一般的には軸心距離Ｓを大き
くとる方法が採られているが、これはミスコンバーゼン
スを大きくするとともに電極端部がネック内壁に接近し
て両者間の高圧特性が劣化するため望ましい方法とは言
えない。In a color picture tube having such a configuration, G3. It is known to increase the diameters of the three beam passing cylinders of the G4 electrode, that is, the main lens aperture. This reduces the magnification of the electron gun, spherical aberration, and the increase in beam spot due to mutual repulsion of electrons! This is an effective method. In this case, the main lens aperture is determined to be as large as possible within a permissible range, comprehensively judged from focus convergence, high voltage characteristics, electrode workability, etc. When increasing the main lens aperture, the general method is to increase the axial distance S, but this increases misconvergence and causes the electrode end to approach the inner wall of the neck, causing a gap between the two. This is not a desirable method because the high-pressure characteristics of the
一方、主レンズの口径の他に、主レンズを構成する２個
の電極Ｇａ、Ｇ４電極間の間隔が大きくなると、レンズ
における電圧勾配は一層緩やかとなってそのために球面
収差も小さくなるため、フォーカス品質の改良には主レ
ンズ電極の表面間の間隔も重要な要素である。しかし、
この距離は大きくなシすぎるとネックのガラス上の静電
荷が電極間の空間に侵入してビームに曲りを生じさせ、
それが電子ビームのミスコンバーゼンスをひき起こすた
めに、一般には１．２７ｍｍの限界値以上に大きくする
ととは許されない。On the other hand, when the aperture of the main lens and the distance between the two electrodes Ga and G4 that make up the main lens become larger, the voltage gradient in the lens becomes gentler, and therefore the spherical aberration becomes smaller. The spacing between the surfaces of the main lens electrodes is also an important factor in improving quality. but,
If this distance is too large, the static charge on the glass neck will enter the space between the electrodes and cause the beam to bend.
It is generally not allowed to be larger than the 1.27 mm limit because it causes electron beam misconvergence.
本発明はこのような事情に鑑みてなされたものであシ、
その目的は、軸心距離Ｓおよび電極表面間の間隔を大き
くせずに、すなわちコンバーゼンスおよび高圧特性の劣
化を防ぎながら、非点収差を小さくしフォーカス品質を
向上させることのできるカラー受像管用電子銃を提供す
ることにある。The present invention has been made in view of these circumstances.
The purpose of this is to create an electron gun for color picture tubes that can reduce astigmatism and improve focus quality without increasing the axial distance S and the spacing between electrode surfaces, that is, preventing deterioration of convergence and high-pressure characteristics. Our goal is to provide the following.
このような目的を達成するために、本発明は、従来１ｍ
程度の間隔をもって対向していた主レンズ電極のビーム
通過孔を形成する開孔面を楕円枠状の電極素子を介して
互いに後退させるとともに円筒を取シ除き、静電荷の侵
入を防ぎつつ相互に一方の電極側の電位が対向する電極
内部によシ深く侵入するようにし、かつ上記ビーム通過
孔を独立した開孔とせずに連通させて間に補助電極片を
設け、しかも各通過孔は連通方向を短軸方向とする楕円
形状としたものである。以下、実施例を用いて本発明の
詳細な説明する。In order to achieve such an objective, the present invention
The aperture surfaces forming the beam passing holes of the main lens electrodes, which were facing each other with a certain distance, are moved back from each other via the elliptical frame-shaped electrode element, and the cylinder is removed, so that they can be mutually connected while preventing the intrusion of static charges. The potential on one electrode side penetrates deeper into the opposing electrode, and the beam passage holes are connected to each other instead of being separate holes, and an auxiliary electrode piece is provided in between, and each passage hole is connected to each other. It has an elliptical shape with the short axis direction. Hereinafter, the present invention will be explained in detail using Examples.
第２図（ａ）は本発明の一実施例を示す電子銃の要部縦
断面図、同図（ｂ）はｂ−ｂ部分に相当する横断面図で
ある。本実施例は、パイポテンシャル形電子銃の例で、
主レンズはＧ３電極１０００とＧ４電極２０００との間
に形成される。これらＧ３電極１０００とＧ４電極２０
００の対向面側は、それぞれ一端面が対向して配置され
た楕円状の枠状電極素子１１００．２１００からなって
おシ、そのために、ネツクガラス上からの静電荷の侵入
はこの枠状電極素子で防ぎつつ、箱状電極素子１２００
．２２００の電子ビーム通過孔を有する開孔面１２１０
，２２１０は、相互に一方が他方に対して後退する方向
に離れた配置とすることができる。この結果、 Ｇ３電
極内部にはＧ４電極側の高電位が、Ｇ４電極側にはＧ３
電極側の低電位が相互に深く侵入する。さらに、上記開
孔面からは第１図に示した従来例のような円筒１４〜１
６．１８〜２０を取シ除いであるために、電位の侵入は
一層深くなるが、このような電位の侵入は対向面上の開
孔部径を大きくしたのと実質的に同じ効果、すなわち主
レンズ電極の実効径を増大させる効果を有する。FIG. 2(a) is a vertical cross-sectional view of a main part of an electron gun showing one embodiment of the present invention, and FIG. 2(b) is a cross-sectional view corresponding to the section bb. This example is an example of a pi-potential type electron gun,
The main lens is formed between the G3 electrode 1000 and the G4 electrode 2000. These G3 electrodes 1000 and G4 electrodes 20
The opposing surface side of 00 consists of elliptical frame-shaped electrode elements 1100 and 2100, each of which has one end face facing the other. The box-shaped electrode element 1200
．． Opening surface 1210 with 2200 electron beam passing holes
, 2210 may be spaced apart from each other in a direction in which one recedes relative to the other. As a result, the high potential of the G4 electrode is inside the G3 electrode, and the high potential of the G3 electrode is on the G4 electrode side.
The low potential on the electrode side penetrates deeply into each other. Further, from the opening surface, cylinders 14 to 1 as in the conventional example shown in FIG.
6. Since the holes 18 to 20 are removed, the penetration of the potential becomes deeper, but such penetration of the potential has substantially the same effect as increasing the diameter of the opening on the opposing surface, i.e. This has the effect of increasing the effective diameter of the main lens electrode.
ところで、上記Ｇ３電極１０００およびＧ４電極２００
０の枠状電極素子１１００および２１００は、３本の電
子ビームの並んだ方向、すなわち使用状態で水平方向の
内径りが垂直方向の内径Ｗよりも大きい。このだめ水平
方向のレンズ集束作用が垂直方向よシも弱くなるため、
電子ビームを集束する際、非点収差があられれる。これ
を補正するために、両電極の箱状電極素子１２００，２
２００の開孔面１２１０．２２１０に設けた３個のビー
ム通過孔１２１１゜１２１２．１２１３および２２１１
．２２１２．２２１３を非円形とし、水平方向の径を垂
直方向の径よりも小さくした。これによシ、水平方向の
電位の侵入を抑えることで水平・垂直方向のレンズ集束
作用を等しくでき、非点収差を取シ除くことができる。By the way, the above G3 electrode 1000 and G4 electrode 200
In the frame-shaped electrode elements 1100 and 2100 of No. 0, the inner diameter in the horizontal direction is larger than the inner diameter W in the vertical direction in the direction in which the three electron beams are lined up, that is, in the state of use. As a result, the lens focusing effect in the horizontal direction becomes weaker in the vertical direction as well.
When focusing the electron beam, astigmatism is introduced. In order to correct this, the box-shaped electrode elements 1200, 2 of both electrodes are
Three beam passing holes 1211, 1212, 1213 and 2211 provided on the aperture surface 1210, 2210 of 200
．． 2212 and 2213 were made non-circular, and the diameter in the horizontal direction was made smaller than the diameter in the vertical direction. This makes it possible to equalize the focusing action of the lens in the horizontal and vertical directions by suppressing the intrusion of electric potential in the horizontal direction, and to eliminate astigmatism.
さらに、上記３個のビーム通過孔１２１１，１２１２゜
１２１３および２２１１．２２１２，２２１３はそれぞ
れ独立ではなく水平方向に沿って一部重なるように連通
して設け、かつ連通部には管軸方向に沿って補助電極片
１２２０および２２２ｏを設けである。ビーム通過孔を
連通させたことで、主レンズの実効径はさらに増大する
。しかし、中央ビームと外側ビームの通路の境界部分で
は非軸対称の主レンズが形成され、非点収差、コマ収差
の強いビームスポットとなる。そこで、はぼ真円状のビ
ームスポットを得るために仕切シ状の補助電極片が有効
となる。Furthermore, the three beam passing holes 1211, 1212, 1213 and 2211, 2212, 2213 are not independent, but are provided in communication with each other so as to partially overlap along the horizontal direction, and the communicating portions are provided along the tube axis direction. Auxiliary electrode pieces 1220 and 222o are provided. By communicating the beam passage holes, the effective diameter of the main lens is further increased. However, a non-axisymmetric main lens is formed at the boundary between the central beam and the outer beam path, resulting in a beam spot with strong astigmatism and coma. Therefore, a partition-shaped auxiliary electrode piece is effective in obtaining a nearly circular beam spot.
本実施例では、対向部分を構成する枠状電極素子１１０
０および２１００は、いずれも所定厚の１枚の板材を打
ち抜くことによシ形成しているため、その機械的強度は
従来の電極に比較してはるかに大きくできる。したがっ
て、従来の電極部品において生じていたようなプレス後
のバレル研摩およびガス抜きを目的としたアニール等の
工程での変形は１１とんど生じることがなく、電子銃の
組立精度を向上させることができる。In this embodiment, a frame-shaped electrode element 110 constituting the opposing portion
Since electrodes 0 and 2100 are both formed by punching out a single plate of a predetermined thickness, their mechanical strength can be much greater than that of conventional electrodes. Therefore, the deformation that occurs in conventional electrode parts during processes such as barrel polishing after pressing and annealing for degassing does not occur11, improving the assembly accuracy of the electron gun. I can do it.
以上、パイポテンシャル形の電子銃を例にして説明した
が、本発明はこれに限定されるものではすく、ユニポテ
ンシャル形もしくはその他の構成の主レンズ電極を備え
た電子銃に適用しても同様の効果を得ることができる。Although the above description has been made using a pi-potential type electron gun as an example, the present invention is not limited to this, and may be similarly applied to an electron gun equipped with a uni-potential type or other configuration of main lens electrode. effect can be obtained.
以上説明したように、本発明によれば、主レンズ電極の
ビーム通過孔を形成する開孔面を楕円枠状の電極素子を
介して離して対向させるとともに、ビーム通過孔部の円
筒は取り除き、かつ各通過孔は連通させて間を補助電極
片で仕切シ、シかも各通過孔は連通方向を短軸方向とす
る楕円形状としたことにより、軸心距離Ｓおよび両電極
の対向表面間隔を大きくすることなしに、したがってコ
ンバーゼンスおよび高゛圧特性等を劣化させることなく
レンズ実口径を拡大し、かつ非点収差を抑えてフォーカ
ス品質のすぐれたカラー受像管を得ることが可能となる
。As explained above, according to the present invention, the aperture surfaces forming the beam passing hole of the main lens electrode are separated and opposed to each other via the elliptical frame-shaped electrode element, and the cylinder of the beam passing hole is removed. In addition, each passage hole is made to communicate with each other and the gap is partitioned by an auxiliary electrode piece.By making each passage hole have an elliptical shape with the communication direction as the short axis direction, the axial center distance S and the distance between the facing surfaces of both electrodes can be adjusted. It is possible to increase the actual aperture of the lens without increasing the size and thus without deteriorating convergence and high-pressure characteristics, suppress astigmatism, and obtain a color picture tube with excellent focus quality.
第１図は従来のカラー受像管の概略構成を示す断面図、
第２図（−）は本発明の一実施例を示す要部縦断面図、
同図（ｂ）は横断面図である。
１・・拳・ガラス外囲羞、２ ＠ ＠ ＠ ＠フェース
プレート、３・・・・けい光面、４，５．６・拳轡・陰
極（電子ビーム源）、１２，１０００ ・・・・主レン
ズを構成するＧ３電極、１７，２０００・・・Φ主レン
ズを構成するＧ４電極、１１００，２１００・・・・枠
状電極素子、１２００，２２００・・・・箱状電極素子
、１２１１，１２１２，１２１３，２２１１，２２１２
．２２１３・―・・電子ビーム通過孔、１２２０ 。
２２２０・・・・補助電極片。FIG. 1 is a sectional view showing the schematic structure of a conventional color picture tube.
FIG. 2 (-) is a longitudinal cross-sectional view of a main part showing an embodiment of the present invention;
Figure (b) is a cross-sectional view. 1...Fist/Glass enclosure, 2 @ @ @ @ Face plate, 3... Fluorescent surface, 4,5.6. Fist/Cathode (electron beam source), 12,1000... G3 electrode constituting the main lens, 17,2000...G4 electrode constituting the Φ main lens, 1100,2100...Frame-shaped electrode element, 1200,2200...Box-shaped electrode element, 1211,1212 ,1213,2211,2212
．． 2213 --- Electron beam passage hole, 1220. 2220... Auxiliary electrode piece.
Claims (1)
ム源と、上記３本の電子ビームをけい光面に収束させる
主レンズとを具備したカラー受像管用電子銃において、
上記主レンズは、対向して配置された２個の電極によっ
て構成され、２個の電槽はそれぞれ一端面が対向するよ
うに配置された３本の電子ビームの配列方向を長袖方向
とする楕円状の枠状電極素子とこの枠状電極素子を他端
面で支持する箱状電極素子とからなシ、箱状電極素子は
一方向に並んだ上記各電子ビームの通過する３個の孔が
、相互に一部重なるように連通して形成された開口部を
有するとともに、当該連通部に３本の電子ビームの通路
を仕切るように管軸方向に沿って延在する補助電極片を
設け、かっ上記連通する３個の孔はそれぞれ連通する方
向の径が垂直方向の径よシも小さい楕円形状であること
を特徴とするカラー受像管用電子銃。An electron gun for a color picture tube comprising an electron beam source that generates three electron beams toward a phosphorescent surface, and a main lens that converges the three electron beams onto the phosphorescent surface,
The main lens is composed of two electrodes arranged facing each other, and each of the two battery cases is an ellipse whose long sleeve direction is the direction in which the three electron beams are arranged so that one end face faces each other. The box-shaped electrode element consists of a frame-shaped electrode element having a shape and a box-shaped electrode element supporting the frame-shaped electrode element on the other end surface, and the box-shaped electrode element has three holes arranged in one direction through which the electron beams pass. It has openings that are formed in communication so as to partially overlap each other, and an auxiliary electrode piece that extends along the tube axis direction so as to partition the paths of the three electron beams is provided in the communication section. An electron gun for a color picture tube, wherein each of the three communicating holes has an elliptical shape in which the diameter in the communication direction is smaller than the diameter in the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13431083A JPS6028139A (en) | 1983-07-25 | 1983-07-25 | Electron gun for color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13431083A JPS6028139A (en) | 1983-07-25 | 1983-07-25 | Electron gun for color picture tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6028139A true JPS6028139A (en) | 1985-02-13 |
Family
ID=15125302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13431083A Pending JPS6028139A (en) | 1983-07-25 | 1983-07-25 | Electron gun for color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6028139A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0157648A2 (en) * | 1984-04-04 | 1985-10-09 | Hitachi, Ltd. | In-line electron gun for color picture tube |
| JPS61264642A (en) * | 1985-05-20 | 1986-11-22 | Matsushita Electronics Corp | Inline type electron gun |
| JPH05215290A (en) * | 1992-02-03 | 1993-08-24 | Imae Kogyo Kk | Heat resistant insulator for induction heating coil |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5682549A (en) * | 1979-12-10 | 1981-07-06 | Toshiba Corp | Electron gun |
| JPS5711460A (en) * | 1980-06-24 | 1982-01-21 | Toshiba Corp | Electron gun |
-
1983
- 1983-07-25 JP JP13431083A patent/JPS6028139A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5682549A (en) * | 1979-12-10 | 1981-07-06 | Toshiba Corp | Electron gun |
| JPS5711460A (en) * | 1980-06-24 | 1982-01-21 | Toshiba Corp | Electron gun |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0157648A2 (en) * | 1984-04-04 | 1985-10-09 | Hitachi, Ltd. | In-line electron gun for color picture tube |
| JPS61264642A (en) * | 1985-05-20 | 1986-11-22 | Matsushita Electronics Corp | Inline type electron gun |
| JPH05215290A (en) * | 1992-02-03 | 1993-08-24 | Imae Kogyo Kk | Heat resistant insulator for induction heating coil |
| JP2660467B2 (en) * | 1992-02-03 | 1997-10-08 | 井前工業株式会社 | Heat-resistant insulator for induction heating coil |
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