JPS58223241A - In-line type electron gun - Google Patents

Abstract

PURPOSE:To obtain the excellent focus characteristics of the captioned electron gun and also enhance the assembling accuracy thereof, by inclining the bottom face of one electrode which constitutes a main lens into a concave type, also forming the bottom face of the other electrode into a flat plane, and making the hole of the other electrode to be eccentric. CONSTITUTION:The bottom face of 3rd grid electrode 4 is inclined into a concave type and the bottom of 4th grid electrode 5 is formed into a flat plane. The both side holes 51, 53 among 3 holes bored on the bottom face of this 4th electrode 5 are more eccentric outside than the both side holes 41, 43 of 3rd electrode 4. The main lens is formed by uniting these grid electrodes 4, 5 together. The distance between outside electrode beams 11, 13 on the phosphor surface can be easily corrected by changing the tilting angle theta of 3rd grid electrode 4. Also, a precise electron gun can be obtained with neither change of the eccentricity of the holes 51, 53 nor change of the electron gun assembling jigs, so that an excellent focus characteristic can be obtained.

Description

【発明の詳細な説明】 この発明は−カラー受像管に内蔵されるインライン型電
子銃に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-line electron gun built into a color picture tube.

第１図および第２図は従来のカラー受像管用のインライ
ン型電子銃を示す部分断面図で、第１図は偏心型、第２
図は傾斜型であり、図において、（１）は６個の陰極を
互いに絶縁して一列配置した陽極構体、（２）は第１格
子電極、（３）は第２格子電極、（４）は第６格子電極
、（５）は第４格子電極であり、各格子電極（２）〜（
５）は陰極構体（１）に対向して電子ビームの進行方向
に順次配置され、絶縁支持体（６）に融着されて所定の
間隔を保持している。第１図の偏心型電子銃では、第４
格子電極（５）の両側の孔＠０゜輪は第３格子電極（４
）の両側の孔ｈ＋）、　ｎよりもｄだけ外側へ中心をず
らしている。第２図の傾斜型電子銃では、第３格子電極
（４）の底面を凹型に、また第４格子電極（５）の底面
を凸型にそれぞれθだけ傾斜させて主レンズを構成して
いる。図において点線で示す６本の電子ビーム（ｕ）　
、　（［２）　、α８）は、陰極構体（１）から放射さ
れたのち、第６格子電極（４）まで直進して主レンズで
集束されるとともに、両側の電子ビーム（１１）　、　
（１Ｂ）は内側に曲げられて螢光面（図示せず）上で中
央電子ビーム０２）に集中される。Figures 1 and 2 are partial cross-sectional views showing conventional in-line electron guns for color picture tubes; Figure 1 is an eccentric type;
The figure shows an inclined type. In the figure, (1) is an anode structure in which six cathodes are insulated from each other and arranged in a row, (2) is the first grid electrode, (3) is the second grid electrode, (4) is the sixth grid electrode, (5) is the fourth grid electrode, and each grid electrode (2) to (
5) are arranged in sequence in the electron beam traveling direction facing the cathode structure (1), and are fused to an insulating support (6) to maintain a predetermined interval. In the eccentric electron gun shown in Figure 1, the fourth
The holes @0° rings on both sides of the grid electrode (5) are the third grid electrode (4
), the center is shifted outward by d from hole h+) on both sides of n. In the tilted electron gun shown in Fig. 2, the main lens is constructed by making the bottom surface of the third grid electrode (4) concave and the bottom surface of the fourth grid electrode (5) convex, respectively, tilted by θ. . Six electron beams (u) shown by dotted lines in the figure
, ([2), α8) are emitted from the cathode structure (1), go straight to the sixth grid electrode (4), are focused by the main lens, and are emitted from the electron beams (11) on both sides.
(1B) are bent inward and focused into a central electron beam 02) on a fluorescent surface (not shown).

第１図の偏心型電子銃では、電子ビーム（１１）　、　
ｆ１２）　。In the eccentric electron gun shown in Fig. 1, the electron beam (11),
f12).

０３）が螢光面上では第３図（＆）および（ｂ）に示す
ように比較的精度よ〈崩−列に並んでいる。第６図（＆
）は小型管の場合を、（ｂ）は大型管の場合を示す。ま
た、Ｂ、Ｇ、Ｒはそれぞれ青、緑、赤に対応する電子ビ
ームのスポットを表わしている。一方一部２図の傾斜型
電子銃では、電子銃組立精度が悪いため、螢光面上では
第６図（Ｑ）および（ｄ）に示すように、ビーム配列が
斜めになったり、Ｒ−０間とＢ−０間の間隔が不均等に
なったりする。この原因は、電子銃組立基準面となる第
４格子電極（５）の底面が凸型になっているためである
。03) are arranged in an irregular row with relative precision on the fluorescent surface, as shown in FIGS. 3(&) and (b). Figure 6 (&
) shows the case of a small pipe, and (b) shows the case of a large pipe. Further, B, G, and R represent electron beam spots corresponding to blue, green, and red, respectively. On the other hand, in some of the tilted electron guns shown in Figure 2, the assembly accuracy of the electron gun is poor, so the beam array is oblique on the fluorescent surface, as shown in Figures 6 (Q) and (d). The intervals between 0 and B-0 may become uneven. This is because the bottom surface of the fourth grid electrode (5), which serves as the electron gun assembly reference surface, is convex.

ここでフォーカス特性を向上させるために、螢光面上の
Ｒ−１間の間隔を０に近づけたいとすると、第１図の偏
心型電子銃では、第４格子電極（５）の偏心量を変更す
ることで対処できるが、この場合電子銃組立治具のマン
ドレルを変えなければならなくなり、専用治具となる欠
点がある。また第２図の傾斜型電子銃では、第３格子電
極（４）および第４格子電極（５）の傾斜角を変えるこ
とでＲ−１間の間隔を調整することはで吉るが、１紀に
述べた電子ビーム（１１）　、　（ｉ２）　、　Ｑａ）
の並びが悪いという欠点がある。なお、受像管では補正
残金ネック外部よりマグネットを用いて補正を行なうが
、その補正量が大きいとフォーカス特性を悪化させるこ
とは周知であり、Ｒ−１間の補正許容量は２．０順が限
度である。Here, in order to improve the focus characteristics, if we want to make the distance between R-1 on the fluorescent surface close to 0, then in the eccentric electron gun shown in Fig. 1, the amount of eccentricity of the fourth grid electrode (5) is This can be solved by changing the problem, but in this case, the mandrel of the electron gun assembly jig must be changed, which has the disadvantage of requiring a dedicated jig. In addition, in the tilted electron gun shown in Fig. 2, it is possible to adjust the distance between R-1 by changing the tilt angle of the third grid electrode (4) and the fourth grid electrode (5); The electron beam (11), (i2), Qa) described in
The disadvantage is that the lines are not well arranged. In addition, in the picture tube, correction is performed using a magnet from outside the correction balance neck, but it is well known that if the correction amount is large, the focus characteristics will be deteriorated, and the allowable correction amount between R-1 is in the order of 2.0. This is the limit.

この発明はこれらの欠点を解消するためになされたもの
で、良好なフォーカス特性が得られるとともに、電子銃
組立治具を変える必要がなく、しかも電子銃組立精度の
良いインライン型電子銃を提供することを目的としてい
る。This invention was made to eliminate these drawbacks, and provides an in-line electron gun that provides good focus characteristics, eliminates the need to change the electron gun assembly jig, and has high electron gun assembly accuracy. The purpose is to

第４図はこの発明の実施例を示す部分断面図であり、図
において第１図および第２図と同一符号は同一部分を示
している。FIG. 4 is a partial sectional view showing an embodiment of the present invention, in which the same reference numerals as in FIGS. 1 and 2 indicate the same parts.

第３格子電極（４）の底面は凹型に傾斜されているが、
第４格子電極（６）の底面は平面に形成されている。The bottom surface of the third grid electrode (4) is inclined in a concave manner,
The bottom surface of the fourth grid electrode (6) is formed into a flat surface.

そして第４格子電極（５）の底面に設けられた６つの孔
のうち両側の孔６１）、−は第３格子電極（４）の両側
の孔６１）　、　Ｈよりも外側へ偏心している。これら
の格子電極＋４１　、　（５）’を組合せて主レンズを
構成すると、第６格子電極（４）の傾斜角θを変えるこ
とによって螢光面上での外側電子ビーム（ｕ）　、　Ｑ
ａ）の間隔を容易に補正できる。また孔Ｇυ、−の偏心
量は変更する必要がないので、電子銃組立治具も変える
ことなく精度の良い電子銃が得られる。　　　”第５図
は螢光面上での電子ビーム間隔の特性を示す特性図で、
横軸に受像管の大きさ、縦軸に外（Ｉｎ子ビームＱｔ）
　、　Ｑａ１間の間隔を表わしたものである。これより
、第６格子電極（４）の傾斜角ａＹｋ変えるのみで、螢
光面上でのＲ−Ｂ間補正量が減少して、フォーカス特性
の良いカラー受像管が得られることがわかる。Of the six holes provided on the bottom surface of the fourth grid electrode (5), the holes 61), - on both sides are eccentrically outward than the holes 61), H on both sides of the third grid electrode (4). When a main lens is constructed by combining these grid electrodes +41, (5)', the outer electron beam (u), Q on the fluorescent surface can be adjusted by changing the inclination angle θ of the sixth grid electrode (4).
The distance in a) can be easily corrected. Furthermore, since there is no need to change the eccentricity of the holes Gυ,-, a highly accurate electron gun can be obtained without changing the electron gun assembly jig. ``Figure 5 is a characteristic diagram showing the characteristics of the electron beam spacing on the fluorescent surface.
The horizontal axis is the size of the picture tube, and the vertical axis is the outside (In beam Qt).
, Qa1 represents the interval between Qa1. From this, it can be seen that by simply changing the inclination angle aYk of the sixth grating electrode (4), the amount of correction between R and B on the phosphor surface is reduced, and a color picture tube with good focus characteristics can be obtained.

なお、以上の実施例はパイポテンシャル型について説明
したが、この発明はこれに限らず他の方式の電子銃たと
えばユニポテンシャル型や多段型のもの等にも適用でき
る。Although the above embodiments have been described with reference to a pi-potential type electron gun, the present invention is not limited to this and can be applied to other types of electron guns, such as uni-potential type and multi-stage type.

以上のように、この発明によれば主しンスヲ構成する一
方の電極の底面を凹型に傾斜させるとともに、他方の電
極の底面は平面に形成し、かつ他方の電極の孔を偏心さ
せたから、電極底面の傾斜角を変えるだけで容易に外側
の電子ビームの間隔を０に近づけることができ、外部か
らのマグネツトニヨる補正量が少なくてすむので、良好
なフォーカス特性を得ることができる。また、治具を専
用治具にする必要がなく、シかも組立精度を向上できる
効果を有する。As described above, according to the present invention, the bottom surface of one of the electrodes constituting the main unit is sloped in a concave shape, the bottom surface of the other electrode is formed flat, and the hole of the other electrode is eccentric. By simply changing the inclination angle of the bottom surface, the distance between the outer electron beams can be easily brought close to 0, and the amount of correction due to external magnetism can be small, so that good focusing characteristics can be obtained. In addition, there is no need to use a dedicated jig, which has the effect of improving assembly accuracy.

【図面の簡単な説明】[Brief explanation of drawings]

第１図および第２図は従来のインライン型電子銃を示す
部分断面図、第６図は螢光面上での電子ビームの並びを
示す模式図、第４図はこの発明のインライン型電子銃の
一実施例？示す部分断面図、第５図は螢光面上での電子
ビーム間隔を示す特性図である。 （４）・・・第６格子電極、（５）・・・第４格子電極
、０１）、（ロ）。 （至）・・・電子ビーム、０Ｉ）、（６）、−０←υ９
輪１輪・・・孔、θ・・・傾斜角。 なお、図中同一符号は同一または相当部分を示す。 代理人葛野信−（外１名） 第１図 第２図 ／２ 第３図 （ｄ）ＢＧＦ１３ＧＮＲｑ 第４図 ２1 and 2 are partial cross-sectional views showing a conventional in-line electron gun, FIG. 6 is a schematic diagram showing the arrangement of electron beams on a fluorescent surface, and FIG. 4 is an in-line electron gun according to the present invention. An example of this? The partial sectional view shown in FIG. 5 is a characteristic diagram showing the electron beam spacing on the fluorescent surface. (4)...Sixth grid electrode, (5)...Fourth grid electrode, 01), (b). (To)...Electron beam, 0I), (6), -0←υ9
One wheel...hole, θ...angle of inclination. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Makoto Kuzuno (1 other person) Figure 1 Figure 2/2 Figure 3 (d) BGF13GNRq Figure 4 2

Claims (1)

【特許請求の範囲】[Claims] （１）３本の電子ビームをそれぞれ通過させる６個の孔
が設けられた底面を有する箱状体からなる第１電極と、
上記６個の孔のそれぞれに対向して電子ビームの下流側
に配置される３個の孔が設けられた底面を有する箱状体
からなる第２電極とによって主レンズを構成し、上記第
１電極の底面を凹型に傾斜させるとともに、上記第２電
極の底面は平面に形成し、かつ第２電極の両側の孔を第
１電極の両側の孔よりも外側へ偏心させたことを特徴と
するインライン型電子銃。(1) a first electrode made of a box-shaped body having a bottom surface with six holes through which three electron beams pass;
A main lens is constituted by a second electrode consisting of a box-shaped body having a bottom surface provided with three holes, which is disposed on the downstream side of the electron beam, facing each of the six holes, and The bottom surface of the electrode is inclined in a concave shape, the bottom surface of the second electrode is formed flat, and the holes on both sides of the second electrode are eccentrically outward from the holes on both sides of the first electrode. Inline electron gun.