KR930010777B1 - Disconvergence correcting apparatus - Google Patents

Abstract

The apparatus corrects the misconvergence by pseudo- saturation reactor with vertical correction coils and the correction coils wound on each drum core. Correction coils (C1-C4) are wound on a couple of drum cores to which each of magnets (13,14) is attached. Pseudo-saturation reactor in which an erasing drum core is included is incorporated into the upper and lower parts of the fronthousing on Y axis.

Description

Misconvergence correction device with undesired radiation reduction function of deflection yoke

1 is a connection diagram of a misconvergence correction apparatus having an unnecessary radiation attenuation function according to the present invention.

2 is a side view of a planar yoke to which the present invention is applied.

3 is a front view of FIG.

4 is a cross-sectional view showing the structure of a misconvergence correction apparatus having an unnecessary radiation attenuation function according to the present invention applied to FIG.

5 is a cross-sectional view showing another embodiment of FIG.

6 is a connection diagram showing another embodiment of the present invention.

7 is a cross-sectional view showing the structure of a misconvergence correction apparatus having an unnecessary radiation attenuation function according to the embodiment of FIG.

* Explanation of symbols for main parts of the drawings

1: Front housing 2: Separator

3: ferrite core 4: clamp

11, 12: correction drum core 13, 14: permanent magnet

15, 16, 17: Drum cores C1, C2, C3, C4 for correction: Correction coil

CV: Vertical Correction Coil H1, H2: Horizontal Deflection Coil

V1, V2: vertical deflection coil L1, L2, L3, L4: elimination coil

The present invention relates to a misconvergence correction device having an undesired radiation attenuation function of the deflection yoke, and more particularly, to improve the structure of the misconvergence correction device using a saturation reactor, and to provide a front housing side of the deflection yoke. It is installed on the deflection yoke to compensate for misconvergence during the operation of the horizontal deflection coil, and to eliminate the unnecessary leakage radiation caused by the leakage magnetic field by eliminating the leakage magnetic fields formed around and around the screen. A misconvergence correction device having an attenuation function.

In general, the deflection yoke has a structure in which a saddle-type horizontal deflection coil is installed inside a pair of separators by a coil winding machine, and a vertical deflection coil is wound around a pair of ferrite cores and fixed by a core clamp.

Such a deflection yoke applies a sawtooth pulse having a fixed frequency to the vertical and horizontal deflection coils during the operation of the cathode ray tube at the neck portion of the cathode ray tube to deflect the electron beam generated from the electron gun to each portion of the screen.

In the R, G, and B three-beam electron gun type color receivers, there is a misconvergence phenomenon in which the three beams are not accurately concentrated in one place due to the mechanical error of the deflection yoke. Typically, in order to correct such misconvergence, a horizontal correction coil connected in series with a horizontal deflection coil is installed adjacent to a vertical correction coil connected in series with a vertical deflection coil.

Here, a saturable reactor in which the horizontal correction coil is wound on a drum core and a magnet is mounted on the drum core to increase the amount of magnetic flux of the correction coil is used.

This misconvergence correction device is usually mounted on the terminal board on the insertion side of the deflection yoke that the electron gun is in contact with, and the reactance of the horizontal correction coil is changed according to the change of the magnetic flux amount of the vertical correction coil. Will be corrected.

The magnetic field generated from the vertical and horizontal deflection coils during the operation of the deflection yoke generates a leakage magnetic field around the cathode ray tube in addition to the deflection of the electron beam. In particular, the leakage magnetic field formed at the front of the screen has a bad effect on the human body. Since the low-frequency sawtooth pulse of about 60HZ is applied to the vertical deflection coil, the leakage magnetic field caused by the vertical deflection coil does not harm the human body, so it can be ignored, but the horizontal deflection coil is applied to the high-frequency sawtooth pulse. The leakage magnetic field generated by this causes harm to the human body.

The conventional technique which prevents unnecessary radiation by the leakage magnetic field so as not to harm the human body is in the opposite direction to the leakage magnetic field generated by the horizontal deflection coils on the upper and lower portions of the front housing of the deflection yoke. A drum core wound with an elimination coil was installed to generate a magnetic field and connected to the horizontal deflection coil.

Therefore, the leakage magnetic field generated by the horizontal deflection coil during the operation of the color receiving pipe is greatly attenuated by the attenuation magnetic field of the erasing coil generated in the reverse direction of the magnetic field, thereby reducing the occurrence of unnecessary radiation.

As described above, in the conventional deflection yoke, a device for canceling the leakage magnetic field and a device for compensating for misconvergence are separately installed, which makes the structure of the deflection yoke complicated and increases the assembly process of the deflection yoke.

In addition, since the cancellation coil for attenuating the magnetic field is connected in series with the horizontal deflection coil, there is a problem that the horizontal sensitivity is lowered.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a misconvergence correction device using a saturable reactance having a function of attenuating leakage magnetic fields above and below the Y-axis of the front housing of the deflection yoke. One device is to provide a misconvergence correction device having an undesired radiation attenuation function of a deflection yoke that can minimize unnecessary radiation caused by a leakage magnetic field and correct misconvergence.

In order to achieve the above object, the present invention is a deflection yoke for performing misconvergence correction by using a saturable reactor, and a coil of correction coil is wound around a pair of drum cores each having a magnet attached to one end thereof. Vertical correction coil is wound, and the deflection yoke is mounted on the upper and lower portions of the front housing on the Y-axis of the deflection yoke, on the side where the magnet of the drum core is not attached. It is characterized by the misconvergence correction device with unnecessary radiation attenuation function.

One embodiment of the misconvergence correction apparatus having the undesired radiation attenuation function of the deflection yoke according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a connection relationship between a misconvergence correction device having an undesired radiation attenuation function and a horizontal deflection coil of a deflection yoke according to the present invention, and a correction coil C1 (C2) in series with the horizontal deflection coil H1. ) Are connected to the horizontal deflection coil (H2), and the correction coils (C3) and (C4) are connected in series, and the correction coils (C2) and (C4) are connected to the lower ends of the upper and lower erasing coils for erasing the magnetic field ( L1) (L2).

With this connection structure, the horizontal deflection coils H1, H2 and the correction coils C1, C2, C3, C4 and the cancellation coil L1 for the correction of the deflection yoke during the operation of the deflection yoke. L2) acts simultaneously.

2 is an axial structural diagram of a deflection yoke to which the present invention is applied, and FIG. 3 is a front view of FIG.

As shown in the figure, a ferrite core 3 wound around a vertical deflection coil V1 and V2 is wound on the clamp 4 to the outside of the separator 2 on which the horizontal deflection coils H1 and H2 are wound. In the conventional deflection yoke mounted by means of the front housing 1, the A and B portions shown above and below the Y-axis are devices for reducing misconvergence correction and unnecessary radiation, and the A and B portions have the same mechanical characteristics. The offset structure is shown in FIG.

That is, correction coils (C1) and (C2) are wound around drum cores (11) and (12), each of which is provided with magnets (13) and (14) in contact with one end, and the center of contact with two drum cores (11) and (12). The drum core (L2) wound around one end of the coil coil (L1) is provided, where the magnets (13) (14) were installed in the direction opposite to each other. In Fig. 4, reference numerals in parentheses denote the part B in the case where the signs of the A and B parts are different, and the same applies to the drawings after Fig. 4 and later.

To describe the operation and effect of the present invention, first, the misconvergence correction device of the above structure, which is a saturation reactance, includes the respective drum cores 11 (14) to which the magnets 13 and 14 are attached during the operation of the deflection yoke. 12 operates as a saturable reactor. A vertical correction coil C is applied to the outside of the saturable reactor.

V) is wound so that the current values of the drum cores 11 and 12 change according to the current amounts of the vertical deflection coils V1 and V2, thereby correcting misconvergence.

In addition, when the horizontal current flows through the drum core, the magnetic flux? C that is opposite to the direction of the horizontal magnetic field? H is generated in the drum core 15 for the unnecessary radiation attenuation.

Therefore, the leakage magnetic flux due to the operation of the horizontal deflection coil is canceled, and because the magnetic flux is compensated by the correction magnetic field by these drum cores 11 and 12, since the magnetic flux is coupled to the drum cores 11 and 12 for misconvergence correction. The increase in the deflection sensitivity of the deflection yoke is prevented from being increased.

On the other hand, as shown in FIG. 5, if a separate drum core 17 having no coil is wound around the erasing drum core 15 is provided, the induction amount of the offset magnetic field is increased toward the front housing 1, and the leakage magnetic field is canceled. The effect is further improved. 6 is a connection diagram of each coil to show another embodiment of the present invention. In the coil connection diagram of FIG. 1, the leakage magnetic field canceling coils L3 and L4 are further provided, and the correction coils C1 and C3 have leakage magnetic field canceling coils L1 and L3, respectively. ) Are connected in series and again the compensation coil (C2) (C4) and the elimination coil

The same connection of (L2) and (L4) continued to be connected in series.

That is, wiring is performed in the order of the upper correction coil, the upper cancellation coil, the lower correction coil and the lower cancellation coil.

This is the mechanical structure as shown in FIG. 7 wherein the coils (L1) and (L3) are wound around the other ends of the two drum cores (11) and (12), each of which has the magnets (13) and (14) attached to one end. The drum cores (15) and (16) are installed.

This structure is such that the magnets 13 and 14 and the drum core 11 at the time of operation of the deflection yoke.

The saturation reactors of the 12 and 12 are operated to correct misconvergence, and at the same time, magnetic fields are generated by the drum cores 15 and 16 and the elimination coils L1 and L3. It is to more effectively cancel the leakage magnetic flux by H1) (H2).

In addition, when each drum core 15, 16 is provided with each drum core without winding coil as in the embodiment of FIG. 7, the offset effect of the leakage magnetic field is further increased.

On the other hand, in the present invention may be carried out by winding the erase coil of the drum coil coiled coil in the drum core in which the coil is not wound in the above embodiment, in which case the drum core 15, 16 is saturated Since the state is prevented, the degradation of the unnecessary radiation attenuation effect due to the saturation state of the drum core core is prevented.

In addition, in the present invention, the erasing drum cores (15) and (17) were separately formed and installed, but they were formed in one piece and applied. The advantage is increased productivity and easier assembly.

As described above, according to the misconvergence correction device having an undesired radiation attenuation function using the saturation reactor of the deflection yoke according to the present invention, a correction coil is wound around a pair of drum cores each having a magnet attached to one end thereof. A vertical correction coil is wound to the outside of the drum core, and a saturable reactor in which the drum coil for erasing the coil is wound is installed on the side where the magnet of the drum core is not attached. Therefore, when correcting misconvergence, the leakage magnetic field generated by the horizontal deflection coil is canceled by using the leakage magnetic field generated by this misconvergence correction device. Will have the effect of being made.

Therefore, since the deflection yoke does not need a separate device for preventing unnecessary radiation, the structure of the deflection yoke is reduced, and the assembly process is reduced. In addition, since there is no separate unnecessary radiation attenuation device, there is an effect of improving the problem of falling deflection sensitivity.

Claims (4)

In the misconvergence correction device for correcting misconvergence using a saturation reactor having vertical correction coils and correction coils wound on each drum core, magnets 13 and 14 are attached to one end, respectively. Correction coils C1 to C4 are wound around the pair of correction drum cores 11 and 12, and a vertical correction coil Cv is wound to the outside of the correction drum core to which the correction coil is wound. On the non-magnet side, the saturable reactor, each of which is equipped with a drum coil 15 for erasing the coil, is mounted on the upper and lower parts of the front housing on the Y-axis of the deflection yoke. Misconvergence correction device provided. The method of claim 1, wherein the saturable reactor is a pair of drum cores for winding a pair of drum coils (11, 12) and a coil coil (L1 ~ L4), each of which is wound around a pair of correction coils (C1 ~ C4) A misconvergence correction device having an unnecessary radiation attenuation function of a deflection yoke provided with (15, 16). 2. The unnecessary radiation attenuation function of the deflection yoke according to claim 1, wherein one end of the erasing drum core (15) on which the erasing coil is wound is provided with an erasing drum core (17) on which the erasing coil is not wound. One misconvergence correction device. 2. The misconvergence correction device according to claim 1, wherein each of the magnets (13,14) is installed on the top of the drum core so that its polarities are in different directions.