KR20030009984A - INNER PIN distortion correction device - Google Patents

Abstract

PURPOSE: An intermediate pin distortion correction device is provided to stabilize dispersion and characteristics of pins of intermediate unit by minimizing the dispersion generated during winding and assembly. CONSTITUTION: An intermediate pin distortion correction device comprises a pair of permanent magnets(MG1,MG2); and horizontal correction coils(L1,L2) and a vertical correction coil(L3) wound on a single drum core, and which generate magnetic fields in opposite directions. The current flowing from horizontal and vertical deflection circuits corrects distortion of pins of an intermediate unit. Since horizontal and vertical correction coils are wound on a single drum core, dispersion is minimized during winding and assembly.

Description

Middle pin distortion correction device

The present invention relates to a device for correcting the pin distortion phenomenon generated in the CRT product, in particular, to generate a drum core and a variable BIAS to generate a magnetic field in the opposite direction by winding with a horizontal correction coil of the deflection yoke used in the CRT product It relates to a middle pin distortion correction device that can stabilize the productivity, price, quality, etc. by integrating the drum core shape of the vertical correction coil.

In recent years, the display market continues to be flattened and the quality of geometric distortion, which is an advantage of flat panel displays, is increasing in comparison with flat products such as LCD & PDP and CRT products. It is becoming a trend.

As a result of this trend, efforts to correct misconvergence are doubled. Among the types of misconvergence, a method for pin distortion correction is typically applied to a pair of drum cores wound with a horizontal correction coil. A method of changing L during up and down deflection was performed using a variable bias coil wound with a pair of bias magnets applied and a vertical correction coil.

Referring to the conventional scheme described above with reference to the accompanying drawings, the first and second horizontal correction coil (L1, L2) and the vertical correction coil (L3) for applying a variable bias magnetic field to it as shown in the circuit diagram of FIG. Consists of

As shown in FIG. 2, the pair of horizontal correction coils L1 and L2 are wound around each drum core so as to generate a reverse magnetic field and permanent magnets MG1 and MG2 applying a fixed bias magnetic field thereto. have. In addition, the pair of permanent magnets MG1 and MG2 includes a vertical correction coil L3 for generating a variable bias magnetic field in a direction opposite to that of the magnetic field.

Referring to FIG. 3A and FIG. 3B to which the pin distortion correction process using the conventional technique configured as described above is described, the possible solid line is represented in the second point P2 and the fourth point P4 in FIG. 3B. When a pin distortion phenomenon occurs, a magnetic field of the horizontal correction coils L1 and L2 is generated by a current flowing in the horizontal deflection circuit, and a pair of existing ones is provided due to the fixed bias magnetic field of the permanent magnets MG1 and MG2. The L value of the horizontal compensation coils L1 and L2 falls.

In addition, since the variable bias generated in the vertical correction coil L3 cancels in the direction opposite to the magnetic field direction of the permanent magnets MG1 and MG2, a difference in the L value of the upper and lower sides occurs, resulting in a difference between the upper and lower sizes (P2). P4) is corrected (the part processed by a thin solid line disappears).

As the conventional pin distortion correction method described above requires winding to each of the horizontal correction coil and the vertical correction coil, productivity decreases, and as the occurrence of the dispersion along the winding of the coil increases, the distribution of the middle pin and The problem is that the characteristics are difficult to maintain stability.

That is, in the accompanying FIG. 3A, each of the core components has a gap (Gap) generated by the repulsive force generated by the electromagnetic force of the core, thereby causing the aforementioned problem.

An object of the present invention for solving the above problems relates to a device for correcting the pin distortion phenomenon generated in the CRT product, in particular, to generate a magnetic field in the opposite direction by winding with a horizontal correction coil of the deflection yoke used in the CRT product It is to provide a middle pin distortion correction device that can stabilize the productivity, price, quality, etc. by integrating the drum core shape of the vertical correction coil to generate a drum core and a variable bias.

1 is an exemplary diagram in which a correction coil for a general middle pin distortion correction is associated with a deflection coil;

2 is an exemplary configuration diagram of a conventional middle pin distortion correction device;

3a and 3b is an exemplary view of the operation of the conventional middle pin distortion correction device and the middle pin distortion correction screen,

4 is an exemplary configuration diagram of an intermediate pin distortion correction apparatus according to the present invention;

A characteristic of the present invention for achieving the above object is, when using a pair of bias magnets applying a fixed bias to a pair of drum cores wound with a horizontal correction coil and a variable bias coil wound with a vertical correction coil. In the middle pin distortion correction device according to the method of changing the reactance value: a horizontal correction coil connected in series to a horizontal deflection coil and a horizontal deflection coil connected in series, and a horizontal field in which magnetic fields reverse to each other are generated in one drum core. The winding of the correction coil and the vertical correction coil, and consists of a pair of permanent magnets so that the upper and lower pin (PIN) distortion of the middle portion is corrected by the current flowing in the horizontal and vertical deflection circuit.

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

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

According to the spirit of the present invention, when the pin distortion phenomenon represented by the possible solid line occurs in the region of the second point P2 and the fourth point P4 in FIG. 3B, the horizontal correction coil L1 is generated by the current flowing in the horizontal deflection circuit. , L2 is generated, and the L value of the pair of horizontal correction coils L1 and L2, which is previously provided, drops due to the fixed bias magnetic field of the permanent magnets MG1 and MG2.

In addition, since the variable bias generated in the vertical correction coil L3 cancels in the direction opposite to the magnetic field direction of the permanent magnets MG1 and MG2, a difference in the L value of the upper and lower sides occurs, resulting in a difference between the upper and lower sizes (P2). P4) is corrected.

At this time, since the cores around which each correction coil is wound are made of separate objects, the separation distance between the cores is generated during the attraction and repulsion.

As described above, the generation of the separation distance between the cores to which each correction coil is wound serves as a factor for increasing the characteristic distribution.

Accordingly, the present invention is generated in the horizontal correction coils L1 and L2 and the vertical correction coil L3 in which magnetic fields in opposite directions are generated in one drum core (not shown) as shown in FIG. 4. Since the variable bias cancels out in the direction opposite to the magnetic field direction of the permanent magnets MG1 and MG2, a difference in the L value of the upper and lower sides occurs, and is configured to correct the middle pin distortion by the size difference between the upper and lower sides.

Therefore, the drum cores previously wound on the horizontal correction coils L1 and L2 and the vertical correction coil L3 are wound on one integrated drum core to secure productivity, price, and quality.

That is, conventionally, the horizontal correction coil and the vertical correction coil are wound and assembled, so that the characteristic distribution is large due to the difficulty of handling and the gap of the horizontal and vertical correction drum cores during assembly. The imbalance and the distribution of the absolute value occurred greatly, but when applying the integrated drum core according to the present invention, only one drum core needs to be handled from the manufacture of the drum core to the assembly of the ASS'Y, thereby improving the workability and the drum core jig (when winding). After fixing to JIG), the horizontal correction coil and the vertical correction coil can be wound at a time, thereby reducing the manufacturing time and securing price competitiveness.

In addition, the gap is not generated at all because the horizontal and vertical correction coils are wound around the integrated core, thus minimizing the characteristic dispersion.

While the invention has been shown and described in connection with specific embodiments thereof, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

By providing a middle pin distortion correction device according to the present invention as described above, the horizontal and vertical correction coils are wound around one drum core without winding to the respective horizontal correction coils and the vertical correction coils. By minimizing the dispersion, the dispersion and characteristics of the middle pins are stabilized, and productivity and price are effective.

Claims (1)

The middle pin distortion correction device according to the method of changing reactance value in the up and down deflection by using a pair of bias magnets applying a fixed bias to a pair of drum cores wound with a horizontal correction coil and a variable bias coil wound with a vertical correction coil. In: Connected in series to the horizontal compensation coil and the vertical deflection coil in series with the horizontal deflection coil, Wind the horizontal correction coil and the vertical correction coil in which magnetic fields in the opposite directions are generated in one drum core, An intermediate pin distortion correction device comprising: a pair of permanent magnets so that the upper and lower PIN distortions of the middle portion are corrected by the current flowing in the horizontal and vertical deflection circuits.