KR100294201B1 - Cathode ray tube having neck of non-circular section and convergence purity magnet for suitable the same - Google Patents

Abstract

The present invention relates to a cathode ray tube having a non-circular neck portion and a color purified magnet assembly suitable for the same. A fixing member fixed to an outer circumferential surface of the neck portion while having an inner circumferential surface; It consists of at least two guide grooves to provide a moving path of. As a result, the magnet members may be individually moved along the guide groove to easily form both a symmetrical correction magnetic field and an asymmetrical correction magnetic field.

Description

Cathode ray tube having neck of non-circular section and convergence purity magnet for suitable the same

The present invention relates to a cathode ray tube having a non-circular neck portion and a color purified magnet assembly suitable for the same, and more particularly, to a color purified magnet assembly capable of easily generating both a symmetrical correction field and an asymmetrical correction field. In particular, the neck portion relates to a cathode ray tube made of a non-circular shape.

In general, a cathode ray tube is a display device that realizes an image by exciting three phosphor beams emitted from an electron gun by hitting a fluorescent screen. To this end, the cathode ray tube is formed by combining a panel forming a fluorescent screen with an inner surface, a neck portion on which an electron gun is mounted, and a trumpet-shaped funnel connecting the panel and the neck to form a bulb. The deflection yoke and the color purified magnet assembly are mounted on the outer circumferential surface of the neck portion.

The deflection yoke and the color-purifying magnet assembly are integrated components (ITC), which deflect the electron beam up, down, left and right so that an electrical signal applied to the cathode ray tube can be reproduced as an image, and match three electron beams. In particular, the deflection yoke generates horizontal and vertical deflection magnetic fields to deflect the electron beam emitted from the electron gun to a specific pixel, and the color-purifying magnet assembly adjusts landing characteristics and convergence of the electron beam with an external forced magnetic field. .

Here, the color purified magnet assembly includes a fixing member 1 mounted to the neck portion, a pair of two-pole magnets 3 rotatably mounted to the fixing member 1, as shown in FIG. It consists of a pole magnet (5) and a six-pole magnet (7), if necessary, may be made of a configuration in which a pair of magnets are omitted.

The pair of two-pole magnets 3 each have two poles, that is, the poles of N1 and S1, and the intensity of magnetization amount depends on the rotation angle between the first dipole magnet 3a and the second dipole magnet 3b. Adjust the color purity of the electron beam and the horizontal raster shift (HRS) and the vertical raster shift (VRS).

In this case, the HLS represents the horizontal movement amount of the G electron beam after color purity adjustment, and the VRS represents the vertical movement amount of the G electron beam after color purity adjustment.

The pair of four-pole magnets 5 have four poles of N1, S1, and N2 and S2, respectively, and adjust the convergence between the R and B electron beams according to the relative rotation angles, and the pair of six-pole magnets 7 ) Have six poles of N1, S1, N2, S2, N3 and S3, respectively, and adjust the convergence between the R and B electron beams and the convergence between the B and G electron beams according to the relative rotation angle.

As described above, each of the magnets in the color purified magnet assembly has a plurality of electrodes symmetrically held therein, and can be easily rotated on the outer circumferential surface of the fixing member 1, so that the symmetrical correction is performed according to the rotation angle adjustment by the operator. It generates a magnetic field.

However, the color purified magnet assembly according to the prior art has a structure that can be used only in a circular shape of the neck portion. Therefore, in recent years, research has been conducted on the characteristics of the cathode ray tube in the case where the neck portion has a shape other than a circular shape in order to efficiently carry out the work of Haiti, but in this case, it is impossible to use the conventional color-purified magnet assembly. do.

That is, if the entire color-purified magnet assembly is formed to correspond to the shape of the non-circular neck portion, the rotation of the magnets is impossible, and if only the inner circumferential shape of the fixing member is formed in a rectangle, the distance between each magnet and the electron beam is enlarged to The impact on is lowered.

In addition, the prior art color purified magnet assembly has a plurality of electrodes symmetrically holding a plurality of electrodes, there is a limit that can not perform convergence correction when an asymmetrical correction magnetic field is required.

Accordingly, the present invention has been devised to solve the above problems, and an object of the present invention is to generate both a cathode ray tube having a non-circular neck portion and a cathode magnetic tube suitable for the cathode ray tube and a symmetrical correction magnetic field and an asymmetrical correction magnetic field. It is to provide a color purified magnet assembly that can be made.

1 is a side cross-sectional view of a cathode ray tube according to the present invention.

2 is a cross-sectional view taken along the line A-A of FIG.

Figure 3 is a perspective view of the color purified magnet assembly according to the present invention.

4 is a cross-sectional view taken along line BB of FIG. 3.

5 is a perspective view of a magnet member.

6 is a cross-sectional view taken along the line A-A of one embodiment of the present invention.

Figure 7 is an exploded perspective view of a color purified magnet assembly according to the prior art.

In order to achieve the above object, the present invention,

A panel for forming a fluorescent screen on the inner surface, an electron gun that emits three electron beams toward the fluorescent screen, a neck portion for mounting the electron gun therein, and a trumpet-shaped funnel for connecting the panel and the neck portion. And a color purified magnet assembly mounted on an outer circumferential surface of the neck portion to adjust landing characteristics and convergence of the electron beam by a magnetic field.

The neck portion is formed with a different length of the horizontal axis and the vertical axis,

The color purified magnet assembly includes a fixing member having an inner circumferential surface corresponding to the neck portion of the cathode ray tube, a plurality of magnet members provided on the fixing member to form a magnetic field, and a path through which the magnet member can move along the neck portion. By providing a cathode ray tube comprising a magnetic field forming means for forming a symmetrical or asymmetrical magnetic field.

Here, the magnetic field forming means is composed of at least two guide grooves formed on the outer circumferential surface of the fixing member in a shape corresponding to the neck portion.

As such, the color-purified magnet assembly can be easily moved to the cathode ray tube having a non-circular neck portion by easily moving the individual magnet members along the guide groove formed in the fixing member. It has an advantage that can be generated.

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

Fig. 1 is a side cross-sectional view of a cathode ray tube according to the present invention, and Fig. 2 shows a cross section of the line A-A in Fig. 1.

As shown in the drawing, the cathode ray tube includes a panel 4 which is a front body which forms a fluorescent film screen 2 on an inner surface thereof, a trumpet-shaped funnel 6 that couples to the panel 4, and the funnel 6. The neck portion 8 of the narrow diameter coupled with the integrally combines to constitute a bulb (10).

The shadow mask 12, which forms a plurality of beam passing apertures 12a, is mounted inside the panel 4 in a position facing the fluorescent screen 2, and is fluorescent on the inner circumferential surface of the neck portion 8. An in-line electron gun 16 is mounted which emits three rows of electron beams 14 towards the membrane screen 2 and deflects the electron beams 14 over the outer circumferential surface of the funnel 6 and the neck portion 8. The deflection yoke 18 is mounted.

Thus, the path of the three-beam electron beam 14 emitted from the electron gun 16 is changed by the horizontal and vertical magnetic fields generated by the deflection yoke 18 to be directed toward a specific pixel in the fluorescent film screen 2. Three rows of electron beams 14 pass through the beam passing apertures 12a formed in the shadow mask 12 and land on respective R, G, and B phosphors in the phosphor film screen 2 to emit the phosphors. .

As shown in FIG. 2, the neck portion 8 that mounts the in-line electron gun 16 therein has a non-circular shape by varying the length of the horizontal axis (the X axis in the drawing) and the vertical axis (the Y axis in the drawing). It is made to be a cross section.

The shape of the neck portion 8 is such that the deflection yoke 18 and the color-purifying magnet assembly 30 with respect to the electron beam 14 are moved by bringing the G electron beam through hole 20 in the center of the electron gun 16 into the neck portion 8. In order to expand the influence, for this purpose, the neck portion 8 is formed with a smoother surface such that the upper and lower portions of the neck portion 8 are as close to the electron gun 16 as possible.

As a result, the cathode ray tube having the non-circular neck portion 8 has an advantage of improving the efficiency of the deflection yoke 18 and the color purified magnet assembly 30 which are the parts of the IC.

Here, the color-purified magnet assembly 30 newly implemented by the present invention is more effectively applied to the non-circular neck portion 8 and is designed to easily generate both a symmetrical correction magnetic field and an asymmetrical correction magnetic field. As it is described in more detail as follows.

Figure 3 is a perspective view of the color purified magnet assembly according to the present invention, Figure 4 is a cross-sectional view of the line 3 B-B, Figure 5 is a perspective view of the magnet member.

As shown, the color purified magnet assembly 30 is mounted on the outer circumferential surface of the neck portion 8 and is movable to the fixing member 32 and the fixing member 32 constituting the body of the color purified magnet assembly 30. It consists of a plurality of magnet members 40 to be mounted.

The fixing member 32 is formed in the same non-circular shape as the neck portion 8 and tightly coupled to the outer circumferential surface of the neck portion 8, and forms a plurality of guide grooves 34, 36, and 38 on the outer circumferential surface thereof. Provide a path of movement of the members 40.

The guide grooves 34, 36, and 38 are used to allow the magnet member 40 to form a symmetrical or asymmetrical correction magnetic field. The magnet members 40 may be formed by the guide grooves 34, 36, and 38. It can move separately along the neck 8.

The fixing member 32 has a first guide groove 34, a second guide groove 36, and a third guide groove (as shown) for generating a two-pole corrected magnetic field, a four-pole corrected magnetic field, and a six-pole corrected magnetic field. 38) are sequentially formed, and as another embodiment, only two guide grooves may be sequentially formed to generate a four-pole and six-pole corrected magnetic field.

Thus, by adjusting the number and position of the magnet members 40 mounted in each of the guide grooves 34, 36, and 38, it is possible to control the intensity and distribution form of the corrected magnetic field.

In more detail, the magnet member 40 has a body portion 42 and horizontal and vertical widths smaller than the body portion 42 at the upper portion of the body portion 42, as shown in FIG. It is made of a handle portion 44 is formed.

At this time, since the magnet member 40 is a single magnet body, when the body portion 42 is the N pole, the handle portion 44 becomes the S pole, and when the body portion 42 is the S pole, the handle portion 44 becomes an N pole.

Each of the guide grooves 34, 36, and 38 constituting the movement path of the magnet member 40 is formed with a narrow diameter on the surface of the fixing member 32, as shown in FIG. 4. , 38a, and expansion portions 34b, 36b, and 38b connected to the inlets 34a, 36a, and 38a, and having a wider width and depth than the inside of the fixing member 32.

Thus, the body portion 42 of the magnet member 40 is located in the extension portions 34b, 36b, 38b of the guide groove, and the handle portion 44 of the magnet member 40 has the inlets 34a, 36a, 38a). Therefore, the magnet member 40 can be stably mounted in the guide grooves 34, 36, 38 without being separated from the fixing member 32.

At this time, the handle 44 of the magnet member 40 protrudes to a predetermined height from the guide grooves 34, 36, and 38 so that the operator can easily adjust the position of the magnet member 40.

As shown in FIG. 6, the color purified magnet assembly 30 according to the present embodiment having the above-described configuration includes a first magnet member 40a having an N pole and a second magnet member 40b having a S pole. The two-pole correction magnetic field distribution may be formed by facing the guide groove 34 on the vertical axis (Y-axis in the drawing).

According to the same principle, the color purified magnet assembly 30 mounts four magnet members 40 in the second guide groove 36 and six magnet members 40 in the third guide groove 38. Thus, a four-pole corrected magnetic field and a six-pole corrected magnetic field can be generated, respectively.

At this time, the plurality of magnet members 40 mounted in each of the guide grooves 34, 36, and 38 are not limited in their movement in the path provided by the guide grooves 34, 36, and 38, and thus, the other magnet members 40 may not be provided. Both symmetrical or asymmetrical configurations can be implemented.

Thus, when an asymmetrical correction magnetic field is required, the asymmetrical correction magnetic field can be easily formed by disposing the magnet members 40 in an asymmetrical manner.

Thus, the color purified magnet assembly according to the present invention is effectively applied to the non-circular neck portion, and has the advantage of freely adjusting the distribution form and intensity of the correction magnetic field by setting the number and position of the magnet members.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the range of.

As described above, the color purified magnet assembly according to the present invention is effectively applied to a cathode ray tube having a non-circular neck portion, and the operator can freely set the number and position of the magnet members, thereby more accurately correcting the distribution form and intensity of the corrected magnetic field. It has an effect that can be easily controlled.

Claims (10)

A panel for forming a fluorescent screen on the inner surface, an electron gun that emits three electron beams toward the fluorescent screen, a neck portion for mounting the electron gun therein, and a trumpet-shaped funnel for connecting the panel and the neck portion. And a color purified magnet assembly mounted on an outer circumferential surface of the neck portion to adjust landing characteristics and convergence of the electron beam by a magnetic field. The neck portion is formed with a different length of the horizontal axis and the vertical axis, The color purified magnet assembly includes a fixing member having an inner circumferential surface corresponding to the neck portion of the cathode ray tube; A plurality of magnet members provided to the fixing member to form a magnetic field; And a magnetic field forming means for providing a path through which the magnet member can move along the neck to form a symmetrical or asymmetrical magnetic field. The cathode ray tube according to claim 1, wherein the magnetic field forming means of the color purified magnet assembly comprises at least two guide grooves formed on an outer circumferential surface of the fixing member in a shape corresponding to a neck portion. A fixing member having an inner circumferential surface corresponding to the neck portion of the cathode ray tube; A plurality of magnet members provided to the fixing member to form a magnetic field; And a magnetic field forming means for providing a path through which the magnetic member can move along the neck to form a symmetrical or asymmetrical magnetic field. 4. The color purified magnet assembly for cathode ray tube according to claim 3, wherein said magnetic field forming means comprises at least two guide grooves formed in an outer circumferential surface of said fixing member in a shape corresponding to a neck portion. 5. The color purified magnet assembly of claim 4, wherein the guide groove comprises an inlet of a narrow diameter and an extension part connected to the inlet part and formed to have a width and a depth that are wider inside the fixing member. The color purified magnet assembly of claim 3, wherein the magnet member comprises a body portion and a handle portion formed on one surface of the body portion with a horizontal and vertical width reduced from the body portion. The color purified magnet assembly of claim 6, wherein the magnet member has a body portion and a handle portion forming an N pole and an S pole, respectively. The color purified magnet assembly of claim 6, wherein the magnet member has a body portion and a handle portion forming an S pole and an N pole, respectively. The color purified magnet assembly of claim 6, wherein the body of the magnet member is inserted into an extension of the guide groove, and the handle of the magnet member is located at the inlet of the guide groove. The color purified magnet assembly of claim 8, wherein the handle part of the magnet member protrudes from the guide groove to a predetermined height to facilitate movement of the magnet member.