KR950002657Y1 - Misconvergence compensator device in crt - Google Patents

Abstract

No content.

Description

Misconvergence correction device of deflection yoke

1 is a front view showing a deflection yoke equipped with a conventional misconvergence correction device.

2 is a plan view showing an embodiment of a misconvergence correction apparatus for a deflection yoke according to the prior art.

3a to 3b are circuit diagrams of FIG.

4 is a plan view showing an embodiment of the misconvergence correction apparatus of the deflection yoke according to the present invention.

5 is a partial circuit diagram of FIG.

* Explanation of symbols for main parts of the drawings

DY: deflection yoke 21: coil separator

22: terminal board 24: the main magnet drum core

25a to 25d: Sub-magnet drum cores FC1 to FC2: First and second ferrite cores

M1, M2: first and second ring magnet VC: vertical deflection coil

VS: Vertical Correction Coil HC: Horizontal Deflection Coil

H1 to H4: Horizontal correction coils MC1, MC2: First and second magnetization coils

FS1, FS2: Ferrite Core AC-DC: AC-DC Converter

The invention relates to a misconvergence correction device for correcting the misconvergence of a deflection yoke mounted on a monitor, and more particularly, by removing the ring magnets from the deflection yoke's misconvergence correction device and mounting ferrite cores in the position. The present invention relates to a deflection yoke misconvergence correction device in which a magnetizing coil is wound around the ferrite core to prevent inductance distribution and misconvergence caused by a magnet.

In general, a CRT (Cathode-Ray Tube) such as a television receiver, a receiver, or a monitor is equipped with a deflection yoke for deflecting an electron beam emitted from an electron gun to scan a electron beam in a predetermined manner to form a screen. However, as the screen size gradually increases and becomes flat, the rare size decreases, and as the thickness of the CRT decreases, the deflection angle increases, and thus the importance of the deflection yoke increases in order to obtain image quality, that is, high resolution. .

In general, as illustrated in FIG. 1, a deflection yoke (DY; deflection yoak) includes a pair of horizontal deflection coils (not shown) mounted inside the coil separator 21, and a pair of vertical deflection coils VC. It is mounted to the outside of the coil separator 21, the terminal board 22 for connection with the misconvergence correction device is mounted on one side of the deflection yoke (DY), the case surrounding the misconvergence correction device ( 23), the deflection yoke by this configuration creates a magnetic field that deflects the beam emitted from the electron gun in the horizontal or vertical direction.

However, in a monitor in which three electron beams, i.e., red (R), green (G) and blue (B) electron beams are scanned, three three due to mechanical error of the deflection yoke DY or application of the monitor are changed. Miss convergence occurs because the electron beam is not concentrated in one spot.

Conventional misconvergence correction apparatus for correcting such a generated misconvergence is as shown in FIG. 2 and FIG.

That is, the vertical correction coil VS connected in series to the vertical deflection coil VC is wound around the main magnet drum core 24, and the horizontal deflection coil HC is disposed on the left and right sides of the main magnet drum core 24. ), The horizontal correction coils H1 to H2 connected in parallel are wound around four sub-magnet drum cores 25a to 25d, respectively. In addition, the left and right sides of the sub-magnet drum cores 25a to 25d have first and second ring-type magnets M1 for reducing inductance distribution generated in the vertical deflection coil VC and the horizontal deflection coil HC, (M2) is attached.

In the conventional misconvergence correction apparatus configured as described above, the horizontal correction coils H1 to H4 connected in parallel to a pair of horizontal deflection coils HC are referred to with reference to the circuit diagrams shown in FIGS. 3A to 3B. The misconvergence in the deflection coil HC is corrected, and the misconvergence in the vertical deflection coil VC is respectively corrected by a vertical correction coil VS connected in series with the pair of vertical deflection coils VC. .

However, the above-described conventional misconvergence correcting apparatus has a screen state due to the difference in the Gauss amount of the first and second ring-type magnets M1 and M2 mounted to increase the conductance of the horizontal correction coils H1 to H4. There is a problem that the distortion is generated in the inductance distribution by the first and second ring type magnets (M1), (M2).

Therefore, this invention is to solve the above problems, the object of this invention is to prevent the distortion of the screen caused by the mismatch of the amount of Gauss of the magnets attached to increase the inductance of the horizontal correction coils, it is generated by the magnet The present invention provides a misconvergence correction device for a deflection yoke with improved reliability by preventing dispersion.

A feature of the misconvergence correction device of the deflection yoke according to the present invention for achieving the above object is a vertical correction coil wound on a main magnet drum core, and a pair of left / right subs to be connected in parallel with the vertical correction coil. A misconvergence correction device comprising horizontal correction coils wound on a magnet drum core and ring magnets magnetized on the side of the sub-magnet drum core; After replacing the ring magnets with a ferrite core, the magnets are wound around the ferrite core so as to be connected in series with the vertical correction coils to prevent the occurrence of misconvergence due to inductance distribution.

Hereinafter, with reference to the accompanying drawings an embodiment of the miss convergence correction device of the deflection yoke according to the present invention will be described in detail.

4 is a plan view showing an embodiment of the misconvergence correction apparatus of the deflection yoke according to the present invention, and FIG. 5 is a partial circuit diagram of FIG.

First, referring to FIG. 4, the misconvergence correcting apparatus includes a pair of left and right pairs of vertical correction coils (VS) wound on a main magnet drum core 24 and parallel to the vertical correction coils (VS). Horizontal correction coils H1, H2, H3, H4 wound on the magnet drum cores 25a, 25b, 25c, 25d, and the sub-magnet drum cores 25a, 25b, 25c, 25d. It consists of a pair of ferrite cores FC1 and FC2 which are landed on the side of and the first and second magnetization coils MC1 and MC2 wound on the ferrite cores FC1 and FC2.

On the other hand, with reference to the partial circuit diagram shown in Figs.

4 and 5, the connection relationship between the horizontal deflection coil HC and the horizontal correction coils H1 to H4 is the same as that shown in FIG. 3A described above, and a pair of vertical deflections connected in parallel A vertical correction coil VS is connected in series to the coil VC, and an AC-DC converter and first and second magnetization coils MC1 and MC2 connected to the vertical correction coil VS. This is connected in series.

Accordingly, the first and second magnetization coils MC1 and MC2 wound on the ferrite cores FC1 and FC2 are the same as the first and second ring magnets for increasing the inductance of the conventional horizontal correction coils. By performing the function, it is possible to prevent the distortion of the screen caused by the mismatch of the Gaussian amount of the ring magnets, and to prevent the scattering caused by the magnets.

As described above, according to the misconvergence correction device of the deflection yoke according to the present invention, instead of the conventional ring magnets attached to increase the inductance of the horizontal correction coils, the magnetization coil is wound on the ferrite core to perform the same function. The reliability of the deflection yoke can be improved by preventing the occurrence of misconvergence due to the inductance distribution.

Therefore, the misconvergence correction device of the deflection yoke according to the present invention can prevent the distortion of the screen caused by the difference in the amount of Gauss of the ring magnets, and prevent the inductance distribution caused by the ring magnets to obtain a clear quality. It can be produced with a deflection yoke.

Claims (1)

A vertical correction coil wound around a main magnet drum core, horizontal correction coils wound around a pair of left and right sub magnet drum cores so as to be connected in parallel with the vertical correction coils, and a ring type magnetized on the side of the sub magnet drum core A misconvergence correction device having magnets; After replacing the ring-shaped magnets with a ferrite core, the magnets are wound on the ferrite core so as to be connected in series with the vertical correction coils to prevent the occurrence of misconvergence due to inductance distribution. Convergence correction device.