JPS6241372B2 - - Google Patents
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- Publication number
- JPS6241372B2 JPS6241372B2 JP22379A JP22379A JPS6241372B2 JP S6241372 B2 JPS6241372 B2 JP S6241372B2 JP 22379 A JP22379 A JP 22379A JP 22379 A JP22379 A JP 22379A JP S6241372 B2 JPS6241372 B2 JP S6241372B2
- Authority
- JP
- Japan
- Prior art keywords
- cathode ray
- ray tube
- focusing
- magnetic field
- magnetic
- 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
Links
- 230000005291 magnetic effect Effects 0.000 claims description 89
- 238000010894 electron beam technology Methods 0.000 claims description 25
- 230000002093 peripheral effect Effects 0.000 claims 3
- 230000000694 effects Effects 0.000 description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000005389 magnetism Effects 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 239000003302 ferromagnetic material Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は電磁集束形陰極線管、特に内蔵永久磁
石による電磁集束レンズを備えた電磁集束形陰極
線管に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetically focused cathode ray tube, and more particularly to an electromagnetically focused cathode ray tube equipped with an electromagnetic focusing lens using a built-in permanent magnet.
一般に、陰極線管の電子ビーム集束手段として
は、静電集束方式と電磁集束方式の２種類があ
り、解像度の点においては、電磁集束方式のもの
が高い解像度が得られる。これは電磁集束レンズ
系では電子ビーム集束作用を行なうレンズ空間に
おいて、静電集束方式よりも高い電圧が印加でき
るため、電子相互の反撥による電子ビームの広が
りが小さく抑制されることに第１の原因がある。
また、第２の原因としては、レンズ作用を行なう
作用空間の電子ビーム進行方向距離を、電磁集束
方式の方が静電集束方式の場合よりも長くとれる
ため、球面、色収差を小さくできることにある。
しかしながら、このような利点を有する電磁集束
方式も従来は集束磁界発生用コイルを陰極線管の
外面に取り付けたり、コイル電流源が必要となつ
たりして重量や価格等を上昇させるなどの欠点を
有しているため、一部の陰極線管のみしか用いら
れていなかつた。しかしながら、このような問題
を解決するために、最近では電子銃電極系の一部
に電子ビームの通路に沿つて加速電極の作用を兼
ねた一対の集束磁性体を組み込み、集束磁界を効
率的に形成させることや、集束磁性体による磁界
形成効率の向上を利用して集束磁界を、管内に内
蔵した永久磁石によつて発生させることが提案さ
れている。 Generally, there are two types of electron beam focusing means for cathode ray tubes: an electrostatic focusing method and an electromagnetic focusing method.In terms of resolution, the electromagnetic focusing method provides higher resolution. The first reason for this is that in the electromagnetic focusing lens system, a higher voltage can be applied in the lens space where electron beam focusing is performed than in the electrostatic focusing system, so the spread of the electron beam due to mutual repulsion of electrons is suppressed to a small extent. There is.
The second reason is that the distance in the electron beam traveling direction of the working space in which the lens action is performed can be made longer in the electromagnetic focusing method than in the case of the electrostatic focusing method, so that spherical and chromatic aberrations can be reduced.
However, the electromagnetic focusing method, which has these advantages, has conventional drawbacks such as the need to attach a focusing magnetic field generating coil to the outside of the cathode ray tube and the need for a coil current source, which increases weight and cost. Because of this, only some cathode ray tubes were used. However, in order to solve these problems, recently a pair of focusing magnetic materials that also serve as accelerating electrodes are incorporated into part of the electron gun electrode system along the path of the electron beam, which makes the focusing magnetic field more efficient. It has been proposed to generate a focusing magnetic field using a permanent magnet built into a tube by utilizing the improved efficiency of magnetic field formation by a focusing magnetic material.
第１図、第２図、第３図、第４図は集束磁性体
と永久磁石とから構成される集束磁気回路を組込
んだ電磁集束形陰極線管の一例を示したものであ
り、第１図は陰極線管の要部横断面図、第２図は
第１図の整磁用ヨークの横断面図、第３図はその
縦断面図、第４図はその側面図である。これらの
図において、１はバルブ、１ａは蛍光面、２はカ
ソード、３は第１グリツド、４は第２グリツド、
５は第３グリツド、６は整磁用ヨーク、７は電子
ビーム通過孔、８は電子ビームの進行方向に着磁
された永久磁石、９，１０，１１は電子ビーム、
１２は集束磁界分布、１３は漏洩磁界である。 1, 2, 3, and 4 show an example of an electromagnetic focusing cathode ray tube incorporating a focusing magnetic circuit composed of a focusing magnetic material and a permanent magnet. 2 is a cross-sectional view of the main part of the cathode ray tube, FIG. 2 is a cross-sectional view of the magnetic shunt yoke of FIG. 1, FIG. 3 is a vertical cross-sectional view thereof, and FIG. 4 is a side view thereof. In these figures, 1 is a bulb, 1a is a phosphor screen, 2 is a cathode, 3 is a first grid, 4 is a second grid,
5 is a third grid, 6 is a magnetic shunt yoke, 7 is an electron beam passage hole, 8 is a permanent magnet magnetized in the traveling direction of the electron beam, 9, 10, and 11 are electron beams,
12 is a focused magnetic field distribution, and 13 is a leakage magnetic field.
このように構成された電磁集束形陰極線管にお
いて、カソード２から放出された電子は、カソー
ド２、第１グリツド３、第２グリツド４によつて
構成される三極レンズによつて集束作用を受けて
いわゆるクロスオーバを形成する。その後、約
20KV程度の高電圧が印加された第３グリツド５
によつて電子は一定の発散角を有して加速され、
永久磁石８と整磁用ヨーク６とによつて構成され
る集束磁気回路による集束磁界領域内に入る。こ
こで、この集束磁界領域は、永久磁石８により発
生した磁束が電子ビーム通過孔７を設けた整磁用
ヨーク６によつて吸収され、一対の整磁用ヨーク
の間隙部で管軸と平行のほぼ均一な集束磁界分布
１２となるため、この磁界分布１２のもとでは複
数の各電子ビーム９，１０，１１は理想的な集束
作用を受け、特に管軸上にないサイドビーム９，
１１に対して悪影響を与えることなく、この集束
磁界分布１２によるレンズ作用によつて上述した
クロスオーバの像点が蛍光面１ａ上に得られる。
また、無偏向時においても各電子ビーム９，１
０，１１が蛍光面１ａの中心附近に到達する。 In the electromagnetic focusing cathode ray tube configured in this way, electrons emitted from the cathode 2 are focused by a triode lens made up of the cathode 2, the first grid 3, and the second grid 4. This forms a so-called crossover. Then about
Third grid 5 to which a high voltage of about 20KV was applied
The electron is accelerated with a constant divergence angle,
It enters the focusing magnetic field area created by the focusing magnetic circuit constituted by the permanent magnet 8 and the magnetic shunt yoke 6. Here, in this focused magnetic field region, the magnetic flux generated by the permanent magnet 8 is absorbed by the magnetic shunt yoke 6 provided with the electron beam passage hole 7, and the magnetic flux is parallel to the tube axis in the gap between the pair of magnetic shunt yokes. Since the focusing magnetic field distribution 12 is almost uniform, each of the plurality of electron beams 9, 10, 11 receives an ideal focusing effect under this magnetic field distribution 12, and especially the side beams 9, which are not on the tube axis,
The above-mentioned crossover image point can be obtained on the phosphor screen 1a by the lens action of the focused magnetic field distribution 12 without adversely affecting the phosphor 11.
Moreover, even when there is no deflection, each electron beam 9, 1
0 and 11 reach near the center of the phosphor screen 1a.
しかしながら、上記構成による電磁集束形陰極
線管において、無偏向時の各電子ビーム９，１
０，１１は、蛍光面１ａ上の一点には完全に集束
されない。これは、例えば、14インチ90度偏向の
カラーブラウン管の場合、各電子ビーム９，１
０，１１はそれぞれ約25mmずれている。これは永
久磁石８により発生した磁界が全て一対の整磁用
ヨーク６の間隙部に存在するのではなく、整磁用
ヨーク６に漏洩磁界１３が発生するとともに、こ
の漏洩磁界１３が各電子ビーム９，１０，１１に
対して均一でなく、特にサイドビーム９，１１に
対して管軸に垂直な動径方向成分が存在するため
である。また、この漏洩磁界１３は、偏向系にも
悪影響を及ぼし、画像の色ずれ、色むらの発生原
因となつていた。 However, in the electromagnetic focusing cathode ray tube with the above configuration, each electron beam 9, 1 when not deflected is
0 and 11 are not completely focused on one point on the phosphor screen 1a. For example, in the case of a 14 inch 90 degree deflection color cathode ray tube, each electron beam 9, 1
0 and 11 are each shifted by about 25 mm. This is because the magnetic field generated by the permanent magnet 8 is not entirely present in the gap between the pair of magnetic shunt yokes 6, but a leakage magnetic field 13 is generated in the magnetic shunt yoke 6, and this leakage magnetic field 13 is transmitted to each electron beam. This is because the beams are not uniform for the side beams 9, 10, and 11, and in particular, there exists a radial direction component perpendicular to the tube axis for the side beams 9, 11. Furthermore, this leakage magnetic field 13 has an adverse effect on the deflection system, causing color shift and color unevenness in images.
したがつて本発明の目的は、上記従来の欠点を
除去するためになされたものであり、永久磁石と
整磁用ヨークとからなる磁気回路からの漏洩磁界
を低減させ、各電子ビームに対する電磁集束作用
を同等とするとともに、偏向磁界系に与える悪影
響を除去した電磁集束形陰極線管を提供すること
にある。 Therefore, an object of the present invention has been made to eliminate the above-mentioned conventional drawbacks, and is to reduce the leakage magnetic field from a magnetic circuit consisting of a permanent magnet and a magnetic shunt yoke, and improve electromagnetic focusing for each electron beam. It is an object of the present invention to provide an electromagnetic focusing cathode ray tube which has the same effect and eliminates the adverse effects on the deflection magnetic field system.
このような目的を達成するために本発明による
電磁集束形陰極線管は、整磁用ヨークの少なくと
もサイドビーム側周端を延在させたものである。
以下図面を用いて本発明による電磁集束形陰極線
管について詳細に説明する。 In order to achieve such an object, the electromagnetic focusing cathode ray tube according to the present invention has a magnetizing yoke whose circumferential end on the side beam side is extended at least.
The electromagnetic focusing cathode ray tube according to the present invention will be described in detail below with reference to the drawings.
第５図、第６図、第７図は本発明による電磁集
束形陰極線管、特に電磁集束作用空間に配置する
集束磁気回路の一実施例を示したものであり、第
５図は要部横断面図、第６図はその縦断面図、第
７図はその側面図であり、第１図〜第４図と同記
号は同一要素であるのでその説明は省略する。こ
れらの図において、１４は軟強磁性材により形成
された整磁用ヨークであり、この一対の整磁用ヨ
ーク１４は、電子ビーム９，１０，１１の通過孔
７をインライン状に設けた円板状の整磁用ヨーク
本体１４ａがそれぞれの通過孔７を電子ビーム
９，１０，１１の進行方向軸に一致させるように
して永久磁石８の両磁極面に密着配置され、かつ
整磁用ヨーク本体４ａの周端から管軸方向に平行
でかつ永久磁石８の端面から互いに逆方向に延在
する円筒部１４ｂを一体的に設けて構成されてい
る。 5, 6, and 7 show an embodiment of an electromagnetic focusing cathode ray tube according to the present invention, particularly a focusing magnetic circuit arranged in an electromagnetic focusing space, and FIG. 5 is a cross-sectional view of the main part. A top view, FIG. 6 is a longitudinal sectional view thereof, and FIG. 7 is a side view thereof. The same symbols as in FIGS. 1 to 4 are the same elements, so the explanation thereof will be omitted. In these figures, reference numeral 14 denotes a magnetic shunt yoke made of a soft ferromagnetic material, and the pair of magnetic shunt yokes 14 have a circular shape with in-line passage holes 7 for the electron beams 9, 10, and 11. A plate-shaped magnetic shunt yoke main body 14a is arranged in close contact with both magnetic pole faces of the permanent magnet 8 so that each passage hole 7 is aligned with the traveling direction axis of the electron beams 9, 10, 11, and the magnetic shunt yoke is A cylindrical portion 14b is integrally provided from the circumferential end of the main body 4a in parallel to the tube axis direction and extends from the end face of the permanent magnet 8 in mutually opposite directions.
このような構成によれば、永久磁石８からの磁
界の大部分は一対の整磁用ヨーク１４の間隙部に
集束磁界分布１２として生じ、また、漏洩磁界１
３は円筒部１４ｂから外側に向かうことになり、
特にこの円筒部１４ｂの内側での漏洩磁界１３は
大幅に少なくなる。 According to such a configuration, most of the magnetic field from the permanent magnet 8 is generated as a focused magnetic field distribution 12 in the gap between the pair of magnetizing yokes 14, and the leakage magnetic field 1
3 goes outward from the cylindrical part 14b,
In particular, the leakage magnetic field 13 inside this cylindrical portion 14b is significantly reduced.
第８図は集束磁気回路の管軸方向の磁界分布を
示したものであり、点線で示した特性は従来の
磁界分布を示し、実線で示した特性は本発明の
磁界分布を示したものである。また、領域Ａは整
磁用ヨークの間隙部を示し、領域Ｂ，Ｃは漏洩磁
界発生領域を示し、特に領域Ｂは円筒部１４ｂの
内部領域、領域Ｃは磁気回路外領域を示したもの
である。同図から明らかなように、漏洩磁界発生
領域Ｂ，Ｃにおいて、実線で示した本発明による
漏洩磁界分布領域が点線で示した従来の漏洩磁界
分布領域に対して約1/3程度と小さくなるため、
漏洩磁界発生領域Ｂ，Ｃにおける漏洩磁界が大幅
に低減されていることが判る。 Figure 8 shows the magnetic field distribution in the tube axis direction of the focusing magnetic circuit, the characteristics shown by the dotted line showing the conventional magnetic field distribution, and the characteristics shown by the solid line showing the magnetic field distribution of the present invention. be. Further, area A indicates the gap between the magnetic shunt yoke, areas B and C indicate the leakage magnetic field generation area, and in particular, area B indicates the internal area of the cylindrical portion 14b, and area C indicates the area outside the magnetic circuit. be. As is clear from the figure, in leakage magnetic field generation regions B and C, the leakage magnetic field distribution area according to the present invention shown by the solid line is about 1/3 smaller than the conventional leakage magnetic field distribution area shown by the dotted line. For,
It can be seen that the leakage magnetic field in the leakage magnetic field generation regions B and C is significantly reduced.
第９図、第１０図、第１１図は本発明による電
磁集束形陰極線管、特に電磁集束作用空間に配置
する集束磁気回路の他の実施例を示したものであ
り、第９図は要部横断面図、第１０図はその縦断
面図、第１１図はその側面図であり、第１図〜第
７と同記号は同一要素となるのでその説明は省略
する。これらの図において、１５は軟強磁性材に
より形成された整磁用ヨークであり、この一対の
整磁用ヨーク１５は、電子ビーム９，１０，１１
の各通過孔７に一致させて永久磁石の両磁極面に
密着配置され、かつ整磁用ヨーク本体１５ａのサ
イドビーム９，１１側周端から管軸方向に平行で
つ永久磁石８の端面から互いに逆方向に延在する
半円筒部１５ｂが一体的に設けられて構成されて
いる。 9, 10, and 11 show other embodiments of the electromagnetic focusing cathode ray tube according to the present invention, particularly a focusing magnetic circuit arranged in the electromagnetic focusing space, and FIG. 9 shows the main part. 10 is a longitudinal sectional view thereof, and FIG. 11 is a side view thereof. Since the same symbols as in FIGS. 1 to 7 represent the same elements, their explanations will be omitted. In these figures, reference numeral 15 denotes a magnetic shunt yoke made of a soft ferromagnetic material, and the pair of magnetic shunt yokes 15 are used for the electron beams 9, 10, 11.
is arranged in close contact with both magnetic pole surfaces of the permanent magnet so as to match each passage hole 7, and is parallel to the tube axis direction from the side beam 9, 11 side circumferential end of the magnetic shunt yoke body 15a, and from the end surface of the permanent magnet 8. Semi-cylindrical portions 15b extending in opposite directions are integrally provided.
このような構成においても、永久磁石８からの
磁界の大部分は、一対の整磁用ヨーク１５の間隙
部に集束磁界分布１２として生じ、漏洩磁界１３
は半円筒部１５ｂから外側に向うことになり、特
にこの半円筒部１５ｂの内側での漏洩磁界１３は
大幅に少なくなり、前述と同様の効果が得られ
る。 Even in such a configuration, most of the magnetic field from the permanent magnet 8 is generated as a focused magnetic field distribution 12 in the gap between the pair of magnetizing yokes 15, and a leakage magnetic field 13
is directed outward from the semi-cylindrical portion 15b, and the leakage magnetic field 13, especially inside the semi-cylindrical portion 15b, is significantly reduced, and the same effect as described above can be obtained.
第１２図、第１３図、第１４図は本発明よる電
磁集束形陰極線管、特に電磁集束作用空間に配置
する集束磁気回路のさらに他の実施例を示したも
のであり、第１２図は要部横断面図、第１３図は
その縦断面図、第１４図はその側面図であり、前
述した第１１図以前の図と同記号は同一要素とな
るのでその説明は省略する。これらの図におい
て、１６は軟強磁性材により形成された整磁用ヨ
ークであり、この一対の整磁用ヨーク１６は、各
電子ビーム９，１０，１１の通過孔７をそれぞれ
一致させて永久磁石８の両磁極面に密着配置され
ている。また、この一対の整磁用ヨーク１６は、
整磁用ヨーク本体１６ａのサイドビーム９，１１
側周端から径方向に延在する半円部１６ｂを一体
的に設け、その全体の平面形状がほぼ楕円状に形
成されている。 12, 13, and 14 show further embodiments of the electromagnetic focusing cathode ray tube according to the present invention, particularly a focusing magnetic circuit disposed in the electromagnetic focusing space, and FIG. 12 shows the main points. FIG. 13 is a longitudinal sectional view thereof, and FIG. 14 is a side view thereof. Since the same symbols are the same elements as those in the figures before FIG. 11, the explanation thereof will be omitted. In these figures, reference numeral 16 denotes a magnetic shunt yoke made of a soft ferromagnetic material, and the pair of magnetic shunt yokes 16 align the passage holes 7 of the electron beams 9, 10, and 11, respectively, and are permanently installed. It is arranged in close contact with both magnetic pole faces of the magnet 8. Moreover, this pair of magnetic shunt yokes 16 are
Side beams 9, 11 of the magnetic shunt yoke body 16a
A semicircular portion 16b extending in the radial direction from the side circumferential end is integrally provided, and the overall planar shape of the semicircular portion 16b is approximately elliptical.
このような構成においても、永久磁石８からの
磁界の大部分は一対の整磁用ヨーク１６の間隙部
に集束磁界分布１２として生じ、漏洩磁界１３は
半円部１６ｂから外側に向うことになり、前述と
同様の効果が得られるとともに、整磁用ヨーク１
６の形成が極めて容易となる。 Even in this configuration, most of the magnetic field from the permanent magnet 8 is generated as a focused magnetic field distribution 12 in the gap between the pair of magnetizing yokes 16, and the leakage magnetic field 13 is directed outward from the semicircular portion 16b. , the same effect as described above can be obtained, and the magnetic shunt yoke 1
6 becomes extremely easy to form.
以上説明したように、本発明によれば、簡単な
構成で電子ビーム集束用磁気回路の漏洩磁界を低
減できるため、無偏向時においても各電子ビーム
を蛍光面の中心に集束させることができ、また、
偏向系への影響も少なくなり、画面の色ずれ、色
むらの少ない電磁集束形陰極線管が得られる極め
て優れた効果を有する。 As explained above, according to the present invention, since the leakage magnetic field of the electron beam focusing magnetic circuit can be reduced with a simple configuration, each electron beam can be focused at the center of the phosphor screen even when there is no deflection. Also,
The effect on the deflection system is also reduced, and an extremely excellent effect is obtained in that an electromagnetic focusing cathode ray tube with less color shift and color unevenness on the screen can be obtained.
第１図は従来の電磁集束形陰極線管の一例を示
す要部横断面図、第２図、第３図、第４図は第１
図の集束磁気回路の要部横断面図、縦断面図、側
面図、第５図、第６図、第７図は本発明による電
磁集束形陰極線管に係わる集束磁気回路の一実施
例を示す要部横断面図、縦断面図、側面図、第８
図は集束磁気回路の管軸上位置に対する磁界分布
を示す特性図、第９図、第１０図、第１１図は本
発明による電磁集束形陰極線管に係わる集束磁気
回路の他の実施例を示す要部横断面図、縦断面
図、側面図、第１２図、第１３図、第１４図は本
発明による電磁集束形陰極線管に係わる集束磁気
回路のさらに他の実施例を示す要部横断面図、縦
断面図、側面図である。
１…バルブ、１ａ…蛍光面、２…カソード、３
…第１グリツド、４…第２グリツド、５…第３グ
リツド、６…整磁用ヨーク、７…電子ビーム通過
孔、８…永久磁石、９，１０，１１…電子ビー
ム、１２…集束磁界分布、１３…漏洩磁束、１４
…整磁用ヨーク、１４ａ…整磁用ヨーク本体、１
４ｂ…円筒部、１５…整磁用ヨーク、１５ａ…整
磁用ヨーク本体、１５ｂ…半円筒部、１６…整磁
用ヨーク、１６ａ…整磁用ヨーク本体、１６ｂ…
半円部。
Figure 1 is a cross-sectional view of the main parts of an example of a conventional electromagnetic focusing cathode ray tube, and Figures 2, 3, and 4 are
The cross-sectional view, longitudinal sectional view, side view, and FIGS. 5, 6, and 7 of the main parts of the focusing magnetic circuit shown in the figure show an embodiment of the focusing magnetic circuit related to the electromagnetic focusing cathode ray tube according to the present invention. Main part cross-sectional view, vertical cross-sectional view, side view, No. 8
The figure is a characteristic diagram showing the magnetic field distribution with respect to the position on the tube axis of the focusing magnetic circuit, and FIGS. 9, 10, and 11 show other embodiments of the focusing magnetic circuit related to the electromagnetic focusing cathode ray tube according to the present invention. A main part cross-sectional view, a vertical cross-sectional view, a side view, and FIGS. 12, 13, and 14 are main part cross-sectional views showing still other embodiments of a focusing magnetic circuit related to an electromagnetic focusing cathode ray tube according to the present invention. FIG. 1... Bulb, 1a... Fluorescent screen, 2... Cathode, 3
...first grid, 4...second grid, 5...third grid, 6...magnetic shunt yoke, 7...electron beam passage hole, 8...permanent magnet, 9, 10, 11...electron beam, 12...focusing magnetic field distribution , 13...Leakage magnetic flux, 14
...Yoke for magnetic shunt, 14a... Yoke body for magnetic shunt, 1
4b...Cylindrical part, 15...Yoke for magnetism shunt, 15a...Yoke body for magnetism shunt, 15b...Semi-cylindrical part, 16...Yoke for magnetism shunt, 16a...Yoke body for magnetism shunt, 16b...
Semicircular part.
Claims (1)
ークを電子ビームの進行方向に着磁した永久磁石
の両磁極面に設けてなる電磁集束手段を陰極線管
ネツク部内に設けたマルチビーム電磁集束形陰極
線管において、前記一対の整磁用ヨークの少なく
ともサイドビーム側周端を延在させたことを特徴
とする電磁集束形陰極線管。 ２ 前記一対の整磁用ヨーク周端に互いに逆方向
の円筒部を設けたことを特徴とする特許請求の範
囲第１項記載の電磁集束形陰極線管。 ３ 前記一対の整磁用ヨークのサイドビーム側周
端に互いに逆方向の半円筒部を設けたことを特徴
とする特許請求の範囲第１項記載の電磁集束形陰
極線管。 ４ 前記一対の整磁用ヨークのサイドビーム側周
端を径方向に延在させたことを特徴とする特許請
求の範囲第１項記載の電磁集束形陰極線管。[Scope of Claims] 1. An electromagnetic focusing means provided in the cathode ray tube neck portion, which is formed by providing two magnetizing yokes each having three electron beam passage holes on both magnetic pole surfaces of a permanent magnet magnetized in the direction in which the electron beam travels. 1. An electromagnetic focusing cathode ray tube provided with a multi-beam electromagnetic focusing cathode ray tube, characterized in that at least peripheral ends on the side beam side of the pair of magnetic shunt yokes extend. 2. The electromagnetic focusing cathode ray tube according to claim 1, wherein cylindrical portions are provided in opposite directions at the circumferential ends of the pair of magnetic shunt yokes. 3. The electromagnetic focusing cathode ray tube according to claim 1, wherein semi-cylindrical portions are provided in mutually opposite directions at peripheral ends on the side beam side of the pair of magnetic shunt yokes. 4. The electromagnetic focusing cathode ray tube according to claim 1, wherein peripheral ends of the pair of magnetic shunt yokes on the side beam side extend in the radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22379A JPS5593639A (en) | 1979-01-08 | 1979-01-08 | Electromagnetic focussing cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22379A JPS5593639A (en) | 1979-01-08 | 1979-01-08 | Electromagnetic focussing cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5593639A JPS5593639A (en) | 1980-07-16 |
| JPS6241372B2 true JPS6241372B2 (en) | 1987-09-02 |
Family
ID=11467954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22379A Granted JPS5593639A (en) | 1979-01-08 | 1979-01-08 | Electromagnetic focussing cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5593639A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1579481B1 (en) * | 2002-06-26 | 2013-12-04 | Semequip, Inc. | A method of semiconductor manufacturing by the implantation of boron hydride cluster ions |
-
1979
- 1979-01-08 JP JP22379A patent/JPS5593639A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5593639A (en) | 1980-07-16 |
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