JPS58102446A - In-line type electrode structure - Google Patents

Abstract

PURPOSE:To obtain an electrode structure with large-diameter openings easily, without changing the distance between the centered points of the openings, by providing incomplete-circular openings which have a diameter smaller than the distance between the centered points by almost the thickness of the mother plate of the electrode, and the adjacent narrow parts of which are perpendicular to the direction in which the openings are arranged. CONSTITUTION:The closed surface 22 of an electrode structure 2 is provided with central and both-side electron beam holes 21G-21B; the distance (S) between the centered points of the holes 21G-21B are maintained the same as that of the conventional electrode structure, and the holes 21G-21B have a diameter (D) which is smaller than (S) by the thickness (t) of the mother plate of the electrode. The structure 2 is a closed cylindrical body consisting of the closed surface 22 and a cylindrical side part 23 which is continuous with the surface 22, and the circumferences of the holes 21G-21B are surrounded by edges 24 protruding inside the closed cylindrical body. These three holes 21G-21B are incomplete discs each having one or two chords. The width (d) of narrow parts 25 partitioned with the straight lines, are adjusted so that the edges 24 can be easily formed around the holes 21G-21B.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the main electron lens constituent electrode of an in-line color picture tube electron gun.

The resolution J[% of the electron gun is mainly limited by the spherical aberration of the electron lens, and in order to obtain the II4I4 resolution characteristics, it is necessary to increase the electrode diameter that makes up the main electron lens to reduce the spherical aberration of the electron lens. There is. The aperture of the main electron lens electrode is limited to the inner diameter of the glass neck of the color picture tube, and in a color picture tube with an in-line lid in which three electron guns are arranged in a row, even if the main electron lens electrode aperture is large, it is 173 or less than the inner diameter of the glass neck. How to approach this maximum diameter in gun structure design is 11! This is a major point.

Collection 1 #7A and FIG. 2 are a top view and a cross-sectional view showing an example of the main electron lens constituent electrode 1 of an in-line electron gun formed from a conventionally used integrated electrode. That is, the electrode structure l has central and both outer electron beam transmission apertures 11G, I
It is a closed cylindrical body in which IR and IIB are bored in the #1llt surface 12 and a cylinder side portion 13 is formed continuously to the closed surface 12. The electron beam aperture I# is surrounded by a protruding edge 14 that protrudes centrally inside the closed cylindrical body, which prevents the mutual influence of the electrostatic electron lenses formed in each aperture and strengthens the closed surface 12. are doing. For the former purpose, it is desirable that the height of the protruding edge 14 be as large as possible, and usually the opening diameter is required to be 1/8 or more. Electron beam aperture 11R, 11G11
BC) The aperture diameter D is limited by the distance 8 between the apertures and the width d@ of the clamp 11g15 sandwiched between the apertures.

In addition to the above-mentioned characteristics, in the integrated electrode l of the main electron lens of the in-line retractable electron gun, the width d of the narrow gap 15 is determined due to the processing necessity of forming three independent protruding edges 14 around each opening 11R#1IG111B. cannot be reduced below a certain level of guts,
This is the biggest structural constraint that limits the aperture diameter D. 6 Normally, when the electrode base material plate thickness is 0.2 to 0.4 mm, d is regardless of the diameter. 0.9-1.2
11111iK is required.

An object of the present invention is to eliminate the above-mentioned drawbacks and provide an electrode structure in which the diameter of the aperture can be increased without changing the distance between the apertures. It has a diameter as small as the electrode base material plate, and the narrow gap between the adjacent apertures has a chord perpendicular to the aperture arrangement direction, and an incompletely circular aperture surrounded by a protruding edge is bored. The narrow gap is treated to form a hole with the above-mentioned diameter, surrounded by a protruding edge, and a light-traveling hole shape, without changing the distance between the holes. An in-line electrode structure is obtained.

The present invention will be described in detail below with reference to the drawings.

Wisteria 3, I! FIG. 4 is a top view and a side sectional view of the integrated in-line electric structure 2 at one stage of rattan according to an embodiment of the present invention. The electrode structure 2 has the same opening distance *St as the conventional one.
-Keep the diameter DC smaller by the thickness of the base material plate t.
-ss-t) with nine central and outer electron beam transmission apertures 21G, 21R.

21B is a closed cylindrical body in which a closed surface 22 is bored and a cylindrical side portion 23 is formed continuously from the closed surface 22.

The three electron beam apertures are each surrounded by a protruding edge 24 projecting into the closed cylindrical body. However, there are two openings 21
R, sandwiched between 21G and 21G, 21B, narrow gap 25
is a straight line that is perpendicular to the arrangement direction of the three apertures, so the three apertures have one or two chords and are in the shape of a nine-perfect circular hole. 25 squares divided by straight lines
is selected to a value that allows the protruding edge 24 to be easily formed around each hole.
411# The walls 25&, 25bt on both sides of the respective narrow gaps 25 are pulled out and polished by handling,
Incomplete circular hole 21R, 21G, 21Bt diameter D
The tN phototracery is made into a circular hole-like aperture. The diameter of the hole was enlarged by handling and polishing the scissors 111M25) Finally, the electrode base material plate R11
It is narrowed to a ring of 1jA. IIk Here, the reason why the width of the narrow gap 260 is ultimately limited to the thickness of the electrode plate is that if it is less than this, the narrow gap will be pulled from the closed surface to the inside of the stain and become dented or cut. In order to prevent this, K requires a thickness greater than the plate thickness due to machining constraints.

! When an incomplete circular hole with a nine-shaped rim having a diameter of Ks-t is coupled, one of the protruding edges 24 in the form of a transverse line facing the scissor part 26 is connected.
1g5a and zsb have a protruding edge 24 due to the elongation of the material.
The height is lower than the rest of the body.

The handling allows it to be stretched out from the walls of this section, making it more than four inches taller than the other sections.

Thus, the opening of the electrode structure 2 is D=s-4ii! as shown in FIGS. 5 and 6. It is enlarged to a fully circular aperture with a diameter of II and a cylindrical lip 24.

In this example, when stainless steel with an electrode base material plate thickness of 0.25111 is used, S: 5.1 m, D: 5.1-0.3
=48 (1131) Tona9. This means that the diameter increases by about 17 points compared to the conventional case where S = 5.1 - 1.0 = 4.1 (II!I), and when S = 6.6 [
) = 6.6 - 0.3 = 6.3 (lull), which is about 14.5 points higher than the conventional D = 5.5 points. In conventional processing methods, the narrow gap d/- is required to exceed a certain value regardless of the electrode diameter.
The modification effect of enlarging the diameter of the openings by applying the present invention results in an S* layer with a small distance between the openings.

According to the above-mentioned IIK invention, while keeping the three aperture distances the same, the conventional machining restrictions are relaxed to a large diameter, and the electrode aperture diameter is increased by 14 tablespoons or more compared to the conventional in-line. A lid electrode structure is easily obtained.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a top view and a side sectional view of a conventionally used in-line electrical assembly, and FIG. 3 is a side sectional view. Song 4 diagram is part of the present invention! The top of the in-line lid electrode structure at the pre-stage of parts processing based on the embodiment [ilr diagram and lIl cross-sectional view are shown in Figure 5 and Figure 6 at the final stage of parts processing fIk based on an example of the present invention. 11R*11G, 1 showing the top view and cross-sectional view of in-line electrical manufacturing and other structures, respectively.
1B, 21R, 21G, 21B... Main electron lens electrode one hole, 12.22... Closed m-plane, 13°2
3...lll1 side, 14.24...
Projected edge, 15°25...pleasant part.

Claims (1)

[Claims] The diameter is smaller than the distance between the holes arranged in-line by the thickness of the electrode base material, and the tSS open holes are surrounded by a protruding edge with a chord perpendicular to the direction in which the cylindrical holes are arranged. Drill three incomplete circular holes, and then handle and polish the enema part chord. An in-line electrode structure formed with a shaped hole and ◆ nine tea.