KR20000033552A - Electrode for cathode ray tube electron gun - Google Patents

Abstract

PURPOSE: An electrode for cathode ray tube electron gun is provided for secured assembly of an inner electrode and an outer electrode of the electron gun for cathode ray tube. CONSTITUTION: An electrode for cathode ray tube includes a first and a second body (351a,352a), an outer electrode material(351), an inner electrode material(352a), and a first and a second wing(351b,352b). The first body(351a) includes one large-radius go-end hole(351H) formed on an inlet of the electron beam emitted from the electron gun. The first wing(351b) is formed on the first body(351a) of an outlet of the electron beam. The second body(352a) includes one small-radius go-end hole formed on an inlet of the electron beam emitted from the electron gun. The second wing(352b) is formed on the second body(352a) of an outlet of the electron beam.

Description

Electrode of electron gun for cathode ray tube

The present invention relates to an electrode of an electron gun for a cathode ray tube (CRT), and more particularly to an electrode of an electron gun for a cathode ray tube in which an electrode structure is improved to improve an assembly process of an electrode member.

The cathode ray tube includes a panel in which a fluorescent film is formed, and a funnel in which a neck portion, which is sealed with the panel, and an electron gun, and a cone portion, in which a deflection yoke DY is installed, is formed. The cathode ray tube is formed by one deflection yoke selectively deflected by the deflection yoke according to the scanning position of the electron beam and landed on each fluorescent point of the fluorescent film. Self-convergence deflection yoke is used to deflect the beam to the desired position. Convergence characteristics of three electron beams landing on the fluorescent film by barrel and pincushion magnetic field of this deflection yoke There was a bad problem.

When the electron beam emitted from the electron gun is deflected to the periphery of the fluorescent film, the cross section of the electron beam landing to the periphery of the fluorescent film is transversely formed by the non-uniform magnetic field of the deflection yoke and the geometric curvature of the cathode ray tube screen surface, and the halo around the electron beam. There was a problem that occurred. In order to solve such a problem, a cathode, a control electrode, and a screen electrode constituting the triode, and a plurality of focus electrodes and final acceleration electrodes constituting the auxiliary and main lenses are configured.

FIG. 1 is a schematic assembly exploded view showing the focus electrode or the final acceleration electrode among these electrodes.

Referring to the drawings, the focus electrode or the final acceleration electrode may include an external electrode member 110 having a large-diameter electron beam passing hole 111 formed therein so that the R, G, and B electron beams scanned from the cathode pass in common; The inner electrode member 120 is fixedly installed in the outer electrode member 110 and has three independent electron beam passing holes 121, 122, and 123 formed therein to allow the electron beams of R, G, and B to pass therethrough. The external and internal electrode members 110 and 120 are assembled as shown in FIG. 1, which is assembled outside of one side of the external electrode member 110 using a predetermined jig (jig). Arrow direction) welding, for example, by laser welding. The welding site is usually made at four places.

And while the wing 112 is formed at the bottom of the inlet groove 113 of the external electrode member 110 into which the internal electrode member 120 is inserted, so that the other member 130 can be supported, the internal electrode member The wing portion 112 formed on the external electrode member 110 is not formed at 120. Therefore, when the external and internal electrode members 110 and 120 are welded, the assembled position of the internal electrode member 120 with respect to the external electrode member 110 may not be constant, and the external electrode member 110 and the internal electrode may be fixed. There is a possibility that the members 120 are horizontally and vertically eccentric with each other. In addition, it is difficult for the electron beam scanned from the electron gun to be accurately landed on the fluorescent film of the panel due to such assembly failure.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an electrode of an electron gun for a cathode ray tube, which can be made well assembled state of the inner electrode member and the outer electrode member.

1 is a cross-sectional view showing a state in which the external electrode and the inner electrode of the electrode of the cathode ray tube electron gun according to the prior art.

Figure 2 is a schematic assembly cross-sectional view showing the configuration of the electrode of the electron gun for cathode ray tube according to the present invention.

3 is an exploded perspective view illustrating a state in which an external electrode and an internal electrode of the electrode of FIG. 2 are separated from each other;

4 is a cross-sectional view illustrating a state in which the external electrode and the internal electrode of FIG. 3 are assembled.

<Description of the code | symbol about the principal part of drawing>

310. Cathode 320. Control electrode

320h, 330h. Electron beam through hole 330. Screen electrode

340. Focus electrodes 341, 351. External electrodes

341H, 351H. Large Diameter Electron Beam Through Hole

342, 352. Internal electrodes 342h, 352h. Independent small diameter electron beam passing hole

350. Anodized electrode 351a. First body part

351b. First wing 351c. Inlet Home

352a. Second body portion 352b. 2nd wing part

360. Shield Cup

Electrode of the electron beam gun for the cathode ray tube of the present invention for achieving the above object, the first body portion formed of a large diameter electron beam passing hole formed on the incident side of the electron beam is made of one through hole so that the electron beam of R, G, B in common; An external electrode member having a first wing portion protrudingly formed extending from the first body portion on the electron beam exit side; A second body part fixedly installed in the external electrode member and having a plurality of passing holes to pass the electron beams of R, G, and B, respectively, and having an independent small-diameter electron beam passing hole formed at the incident side of the electron beam; And an internal electrode member having a second wing part protrudingly formed to extend to the second body part.

Here, it is preferable that the shape of the first wing portion and the shape of the second wing portion are the same, and the external electrode member and the inner electrode member are joined to each other by welding the first wing portion and the second wing portion.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a cross-sectional view schematically showing the configuration of the electrode of the cathode ray tube electron gun according to the present invention.

Referring to the drawings, the electrodes of the cathode ray tube electron gun according to the present invention, the cathode 310, the control electrode 320 and the screen electrode 330 and the focus electrode 340 and the anode which form a main lens of the pre-triode tube Electrodes 350 are arranged in sequence. A shield cup 360 coupled to the anode wood 350 is installed. These electrodes are fusion bonded to a buried portion (not shown) and bead glass (not shown) formed at the edges of these electrodes.

The control electrode 320 and the screen electrode 330 have electron beam through holes 320h and 330h through which R, G, and B electron beams scanned from the cathode 310 pass. The external electrodes 341 and 351 having the large-diameter electron beam through holes 341H and 351H each having one through hole to allow the R, G, and B electron beams to pass in common, respectively. And internal electrodes 342 and 352 fixedly installed in the external electrodes 341 and 351 and having three independent small-diameter electron beam passing holes 342h and 352h formed therein so that R, G, and B electron beams pass through, respectively. It is configured by.

3 is a perspective view illustrating the anode electrode 350 separated from the above-described electrodes.

Referring to the drawings, the focus electrode 340 or the anode electrode 350 is assembled as a part of the electron gun using the pair of external electrodes 341 and 351 or the internal electrodes 342 and 352 as described above. . In one embodiment, the external electrode 351 of the anode electrode 350 may include a first body portion 351a having a large-diameter electron beam passing hole 351H formed at an incident side of the electron beam, and an electron beam exiting side. A first wing portion 351b extending and protruding to the first body portion 351a is provided, and an inlet groove 351c is formed in the first body portion 351a so that the internal electrode 352 can be inserted and fixed. do. The internal electrode 352 of the anode electrode 350 includes a second body portion 352a having an independent small-diameter electron beam through hole 352h formed at the incident side of the electron beam, and a second body portion at the electron beam exit side. A second wing 352b protrudingly formed extending to 352a is provided.

4 is a cross-sectional view illustrating a state in which the external electrode 351 and the internal electrode 352 are coupled to each other.

Referring to the drawings, the internal electrode 352 is inserted into the inlet groove 351c of the external electrode 351 is coupled. On the other hand, it is preferable that the shape of the first wing portion 351b and the shape of the second wing portion 352b respectively formed on the external electrode 351 and the internal electrode 352 are the same. Because, as described above, after the external electrode 351 and the internal electrode 352 are bonded to each other, when the first wing portion 351b and the second wing portion 352b are welded to each other, the same area as possible as possible. This is because the contact force is increased only by contact, so that welding can be easily performed.

Such welding is usually performed by laser welding, and the assembly is completed by performing surface welding of the first and second wing portions 351b and 352b on the bottom surface (arrow direction) of the second wing portion 352b. Therefore, the first wing portion 351b is in contact with the second wing portion 352b to be inserted into the insertion groove 351c of the first body portion 351a, and the insertion groove (without using a separate jig) The internal electrode 352 is positioned at the position 351c.

As described above, the electrode of the electron beam for a cathode ray tube according to the present invention has the following effects.

By forming predetermined wing portions on the bottom surface of the external electrode and the inner electrode, and contacting the wing portions with each other in surface contact with each other, then welding at the bottom of the wing portion, the inner electrode can be accurately coupled to the outer electrode so that the depth of the inlet groove of the outer electrode It can reduce change and eccentricity.

Therefore, the external electrode and the internal electrode are correctly assembled, and the electron beam scanned from the electron gun is accurately landed on the fluorescent film of the panel.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (3)

A first through-hole formed by forming one through-hole so that the electron beams of R, G, and B pass in common, and having a large-diameter electron beam through-hole formed on the incident side of the electron beam; An external electrode member provided with one wing portion; A second body part fixedly installed in the external electrode member and having a plurality of passing holes to pass the electron beams of R, G, and B, respectively, and having an independent small-diameter electron beam passing hole formed at the incident side of the electron beam; And an inner electrode member having a second wing portion protrudingly formed to extend to the second body portion of the cathode of the cathode ray tube electron gun. The method of claim 1, An electrode of an electron gun for a cathode ray tube, wherein the first wing portion and the second wing portion have the same shape. The method of claim 1, The external electrode member and the internal electrode member is the electrode of the electron gun for the cathode ray tube, characterized in that the first blade portion and the second blade portion are welded to each other.