JP2001351545A - Deflection yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deflection yoke facilitating correction of vertical misconvergence on a screen and allowing screen correction in the fixed state of the deflection yoke without affecting following correction work or ITC work. SOLUTION: This deflection yoke comprises a coil separator comprising a screen connected to a screen face of a cathode-ray tube, a rear cover and a neck extended from the center face of the rear cover and connected to an electron gun of the cathode-ray tube; horizontal and vertical deflection coils provided on the inner and outer peripheral surfaces of the coil separator to form the horizontal deflection magnetic field and vertical deflection magnetic field; a correcting means provided on the rear cover of the coil separator to correct the vertical magnetic field and screen dispersion; and a transfer means provided between the rear cover and the correcting means to minutely transfer the correcting means with respect to the rear cover.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke, and more particularly, to a mounting device provided on a coil separator of a deflection yoke so that a screen correction object for performing a screen correction can be easily installed. It is.

[0002]

2. Description of the Related Art Generally, a deflection yoke used in a cathode ray tube (CRT) of a TV receiver or a monitor is of various types such as a saddle-toroidal type, a saddle-saddle type, and the like. There is a type.

A general deflection yoke 10 is provided on a neck portion 2 of a cathode ray tube 1 as shown in FIG. 1, and has a saddle-saddle structure as shown in FIGS. Mold yoke and saddle-toroidal type as shown in FIGS.

Such a deflection yoke deflects an electron beam emitted from a BGR electron gun 3 provided in a neck portion 2 of a cathode ray tube 1 to the left, right, up and down, so as to deflect the electron beam on a fluorescent screen of the cathode ray tube. Serves to hit the exact location.

FIGS. 2 and 3 show a general saddle-saddle type deflection yoke. As shown in FIG. 2, a saddle type deflection yoke is provided on the upper and lower sides of the inner peripheral surface of a screen portion of a substantially conical coil separator 11. Are provided, and saddle-shaped vertical deflection coils 13 are provided on the left and right sides of the outer peripheral surface.

In order to reinforce the magnetic field of the vertical deflection coil 13, a substantially cylindrical ferrite core 14 is provided on the outer peripheral surface of the screen portion of the coil separator 11.

A frame pre-coil 15 for correcting a frame (COMA) generated by the vertical deflection coil 13 is provided on the outer peripheral edge of the neck portion of the coil separator 11.

FIGS. 4 and 5 show a general saddle-toroidal deflection yoke. A horizontal deflection coil 12 is provided above and below an inner peripheral surface of a screen portion of a substantially conical coil separator 11, and an outer peripheral surface thereof. The ferrite core 14 is provided with a substantially cylindrical ferrite core 14, and a toroidal vertical deflection coil 16 is wound along the upper and lower sides of the ferrite core 14.

A frame pre-coil 15 for correcting a frame generated by the vertical deflection coil 16 is further provided on the outer peripheral edge of the neck portion of the coil separator 11.

However, in such a conventional deflection yoke, the ferrite core 14 wound with the vertical deflection coil 13 is joined to the outer peripheral surface of the coil separator 11 on which the horizontal deflection coil 12 is mounted. Dimensional variation of core 14 and vertical deflection coil 13
This causes a problem that misconvergence occurs on the screen due to the variation in the windings.

That is, as shown in FIGS. 6 and 7, a misconvergence in the vertical direction and a misconvergence in the horizontal direction occur.

As a method for correcting such misconvergence, that is, a method for correcting horizontal misconvergence, as shown in FIG. 8, a correction piece 20 is provided on a rear plate 11a of a coil separator 11. To correct the horizontal magnetic field, and as a method for correcting vertical misconvergence,
Although not shown, the vertical magnetic field is corrected while adjusting the volume on a circuit board provided on one side surface of the coil separator 11 or rotating the entire deflection yoke 10 around the cathode ray tube 1.

However, in correcting the vertical magnetic field by adjusting the volume on the circuit board or rotating the entire deflection yoke 10, the correction of the vertical magnetic field is possible. For example, since the vertical magnetic field is affected, a problem that another correction operation must be further performed is caused. In correcting the vertical magnetic field by rotating the deflection yoke 10, the final operation, that is, Since it affects the ITC work, there is a problem that the workability is reduced.

[0014]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned various problems, and can easily correct vertical misconvergence on a screen. It is an object of the present invention to provide a deflection yoke that allows a screen correction operation to be performed in a state where is fixed, and does not affect a subsequent correction operation or ITC operation.

[0015]

In order to achieve the above object, a deflection yoke according to the present invention comprises a screen portion connected to a screen surface of a cathode ray tube, a rear cover, and a cathode ray tube extending from a center surface of the rear cover. A coil separator consisting of a neck part connected to the electron gun part of the tube,
Horizontal and vertical deflection coils provided on the inner and outer peripheral surfaces of the coil separator to form a horizontal deflection magnetic field and a vertical deflection magnetic field, and correction means provided on a rear cover of the coil separator to correct a vertical magnetic field and screen variation. And a transfer means provided between the rear cover and the correction means, and for slightly transferring the correction means to the rear cover.

The correcting means is provided so as to face the neck of the coil separator, and has a pair of guide rails each having a guide groove on both inner surfaces, and is inserted along the guide groove of the guide rail. It comprises a correction piece and a guider for integrally connecting the outer ends of the correction piece to each other.

The correction piece is formed from metal, and the guider is formed from synthetic resin.

The correction piece is inserted into the guider and is integrally formed.

The transfer means comprises guide projections provided so as to be selectively locked on the outer surface adjacent to the guide rail of the rear cover and the corresponding lower surface of the correction means.

The guide projections provided on the correction means are provided on the lower surfaces on both sides of the guider.

On the rear cover corresponding to the correction means, an elastic piece having an elasticity is further provided upward in order to prevent the correction means from floating during the transfer.

On the upper surface of the elastic piece is formed a locking projection which is selectively locked with the guide projection of the correcting means.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 9 is a perspective view of a deflection yoke according to the present invention.
10 is a plan view of FIG. 9, FIG. 11 is a sectional view of FIG.
FIG. 13 is an extracted perspective view of the correction means, and FIG. 13 is a sectional view taken along line AA of FIG.

As shown in FIG. 1, the deflection yoke 100 according to the present invention is provided with a coil separator 110 which is formed symmetrically and is united with one another.

The coil separator 110 shown in FIG.
As shown in FIG. 3, a screen portion 120 connected to the screen surface of the cathode ray tube 1, a rear cover 130, and a neck portion 140 extended from the center of the rear cover 130 and connected to the electron gun portion 3 of the cathode ray tube 1. Become.

Inside the coil separator 110, there is provided a horizontal deflection coil 111 for generating a horizontal deflection magnetic field for deflecting the electron beam in the horizontal direction.
A vertical deflection coil 112 for generating a vertical deflection magnetic field for deflecting the electron beam in the vertical direction is provided.

On the outer surface of the coil separator 110, a ferrite core 150 is fixed by, for example, a clamp to strengthen the magnetic field of the horizontal and vertical deflection coils 111 and 112.

Rear cover 1 of coil separator 110
30 is provided with a correction means 200 for correcting the vertical magnetic field and the screen variation. The correction means 200 and the rear cover
Is provided with a transfer means 300 for minute transfer with respect to.

When the detailed structure of the above-mentioned correcting means 200 is examined, it is roughly divided into a guide rail 210, a correcting piece 220 and a guider 230 as shown in FIGS.

The guide rail 210 is connected to the rear cover 130.
The guide groove 211 is formed on the inner surface on both sides of each guide rail.

The correction piece 220 is inserted into the guide rail 210 and is a portion for substantially improving the screen variation and correcting the vertical magnetic field.

The guider 230 serves to guide the correction piece 220 so as to be stably inserted into the guide rail 210. In particular, the outer ends of the correction piece 220 are integrally connected to form a single assembly. Function.

Here, the correction piece 220 is formed by pressing a metal, and the guider 230 is formed by injection molding of a synthetic resin.

In order to improve the workability, the correction piece 220 is integrally injection-molded by inserting it when the guider 230 is injection-molded.

The transfer means 300 is provided for finely correcting the magnetic field while moving the correction means 200 minutely.
Guide projections 310 and 320 that are selectively locked to each other are formed between and the lower surface of the correction means 200 corresponding to the rear cover 130.

That is, the guide projection 310 is
A large number of guide projections 320 are formed at regular intervals on the upper surface of the rear cover 130 corresponding to the guider.

Guide projections 320 are provided on the rear cover 130.
In order to facilitate the connection of the guider 230 and to prevent the play from occurring during the connection process, the end of the rear cover 130 is cut into a predetermined width to increase the elasticity upward. The elastic piece 400 is formed, and the guide protrusion 320 is formed on the upper surface of the elastic piece 400.

In the deflection yoke according to the present invention having such a configuration, in order to improve the screen variation and enhance the vertical magnetic field, the guide strip 210 formed on the upper surface of the rear cover 130 is provided with the correction piece 220 constituting the correction means 200. Fits.

At this time, the lower surface of the guider 230 that integrally connects the outer ends of the correction pieces 220 and the rear cover 130
Guide projections 310 formed on the upper surface of the elastic piece 400 of FIG.
Due to 320, the correction piece 220 is slightly
0 is inserted into the insertion groove 211.

That is, by finely adjusting the transfer distance of the correction piece 220, the magnetic field correction can be performed precisely.

On the other hand, in the process of inserting the correction piece 220, the guider 230 is locked by the guide rail 210 and receives an elastic force upward by the elastic piece 400, so that the guider 230 is prevented from floating.

Accordingly, it is possible to reliably prevent the correction piece 220 from being detached from the guide rail 210 due to an operator error or the like.

[0044]

As described above, according to the deflection yoke according to the present invention, since the correction piece can be minutely transferred on the guide rail of the rear cover, it is possible to improve the screen variation and correct the vertical magnetic field accurately. It can be performed stably.

Further, the guider integrally connecting the correction pieces can prevent the correction pieces from being detached from the rear cover, thereby improving the workability.

[Brief description of the drawings]

FIG. 1 is a sectional view of a cathode ray tube employing a general deflection yoke.

FIG. 2 is a sectional view of a saddle-saddle type deflection yoke.

FIG. 3 is a cross-sectional view of FIG.

FIG. 4 is a sectional view of a saddle-toroidal deflection yoke.

FIG. 5 is a cross-sectional view of FIG.

FIG. 6 is a conceptual diagram illustrating a misconvergence state in the vertical direction.

FIG. 7 is a conceptual diagram illustrating a misconvergence state in the horizontal direction.

FIG. 8 is a perspective view of a conventional deflection yoke.

FIG. 9 is a perspective view of a deflection yoke according to the present invention.

FIG. 10 is a plan view of FIG. 9;

FIG. 11 is a sectional view of FIG. 9;

FIG. 12 is an extracted perspective view of a correction unit.

13 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 Reference Signs List 1 cathode ray tube 1a screen surface 2 neck portion 3 BGR electron gun 10 deflection yoke 11 coil separator 12 horizontal deflection coil 13 vertical deflection coil 14 ferrite core 15 coma pre coil 16 vertical deflection coil 100 deflection yoke 110 coil separator 111 horizontal deflection coil 112 vertical deflection coil Reference Signs List 120 Screen part 130 Rear cover 140 Neck part 150 Ferrite core 200 Correction means 210 Guide rail 211 Guide groove 220 Correction piece 230 Guider 300 Transfer means 310, 320 Guide protrusion 400 Elastic piece

Claims (8)

[Claims] 1. A coil separator comprising: a screen portion coupled to a screen surface of a cathode ray tube; a rear cover; and a neck portion extending from a center surface of the rear cover and coupled to an electron gun portion of the cathode ray tube; Horizontal and vertical deflection coils provided on the inner and outer peripheral surfaces and forming a horizontal deflection magnetic field and a vertical deflection magnetic field; correction means provided on a rear cover of the coil separator to correct a vertical magnetic field and screen variation; A transfer means provided between the correction means and the correction means for slightly transferring the correction means to the rear cover. 2. The pair of guide rails, which are provided so as to face each other around a neck portion of the coil separator, each of which has a guide groove on an inner surface on both sides, and is fitted along the guide groove of the guide rail. The deflection yoke according to claim 1, wherein the deflection yoke comprises: a correction piece that corrects a vertical magnetic field on a screen; and a guider that integrally connects outer ends of the correction piece to each other. 3. The deflection yoke according to claim 2, wherein the correction piece is formed of a metal, and the guider is formed of a synthetic resin. 4. The deflection yoke according to claim 2, wherein the correction piece is inserted into the guider and is integrally formed. 5. A transfer device according to claim 1, wherein said transfer means includes guide projections provided to be selectively locked to an outer surface adjacent to the guide rail of said rear cover and a corresponding lower surface of said correction means. The deflection yoke according to claim 1, wherein 6. The deflection yoke according to claim 5, wherein the guide projections provided on the correction means are provided on lower surfaces on both sides of the guider. 7. On the rear cover corresponding to the correction means, to prevent the correction means from floating during transfer.
The deflection yoke according to claim 5, wherein an elastic piece having elasticity is further provided upward. 8. The deflection yoke according to claim 7, wherein a locking projection is formed on an upper surface of the elastic piece to be selectively locked with a guide projection of the correcting means.