KR950006435Y1 - Cross talk correction of d.y - Google Patents

Abstract

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Description

Deflection yoke cross torque compensation device

1 is a front view of a general deflection yoke.

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

3 is a schematic view of the vertical deflection coil of FIG.

4A and 4B are state diagrams for explaining crosstalk due to electrical charge of a vertical deflection coil of a deflection yoke;

5 is a screen state diagram for explaining an orthogonal view.

6 is a perspective view of the crosstalk correction device of the deflection yoke according to the present invention.

7 is a perspective view of a flat yoke having the crosstalk correction device of FIG.

8 is a circuit diagram of a crosstalk correction device according to the present invention.

9 is a state diagram schematically showing a horizontal deflection coil and a cross torque correction device of the deflection yoke of FIG.

10 is a schematic view for explaining the operation of the crosstalk correction device of FIG.

* Explanation of symbols for main parts of the drawings

DY: Deflection yoke VC: Vertical deflection coil

3HC: horizontal deflection coil 11: neck portion

12 screen portion 13 coil separator

14: terminal board ⇒: deflection

→: magnetic field

The present invention relates to a cross talk compensator for a deflection yoke. More specifically, a cross can be effectively removed by installing a separate coil connected to a vertical deflection coil of a deflection yoke regardless of orthogonality. It relates to a torque compensator.

In general, a cathode ray tube (CRT) such as a TV receiver or a monitor is equipped with a deflection yoke for deflecting an electron beam emitted from an electron gun, thereby forming a screen by scanning the electron beam in a predetermined manner. As the size of the screen increases, the plane becomes smaller, the pixels become smaller, and the thickness of the CRT becomes thinner, the deflection yoke (DY) is becoming more important in order to increase the deflection angle and obtain high resolution.

As shown in FIG. 1, the deflection yoke DY includes a pair of horizontal deflection coils HC and a vertical deflection coils inside and outside the coil separator 13 including the neck 11 and the screen part 12, respectively. (VC) is mounted, and a terminal board 14 for connection with a misconvergence correction device is installed on one side of the neck portion 11. As sawtooth waves are applied to the vertical and horizontal deflection coils VC and HC to form a magnetic field, the red (R), green (G) and blue (B) electron beams emitted from the electron gun determine the dice on the screen. do.

However, due to the mechanical imbalance of the deflection yoke DY, the degree of coincidence (hereinafter referred to as "orthogonality") of the electron beam in the vertical direction of the screen falls as shown in FIG.

In addition, the mechanical imbalance of the deflection yoke DY causes the residual voltage to be induced by an alternating current applied to each of the vertical and horizontal deflection coils VC and HC. As shown in FIG. 3, the residual voltage is mainly induced in the vertical deflection coil VC by the leakage magnetic field of the horizontal deflection coil HC to which a high frequency current is applied, and the residual deflection coil VC The front and rear are instantaneously magnetized to generate a large amount of current voltage (cross torque; Vt), which acts as a noise.

As shown in FIG. 4, when the respective coil strands of the vertical deflection coils VC are represented by dipoles, the cross torques Vt are present in the vertical deflection coils VC.

The correction of the orthogonality and cross torque caused by the mechanical unbalance of the deflection yoke DY is first corrected to some degree by the mechanical operation of the deflection yoke DY, and then the deflection yoke DY is replaced by a cathode ray tube. Of the deflection yoke DY at the position where the cross talk is minimized by turning the deflection yoke DY from side to side in the assembling process installed in the electron gun neck portion of the gun. It is possible.

However, in the conventional method of adjusting the orthogonality and crosstalk, a large-angle television which has a large deflection angle due to the size of a cathode ray tube, a high definition, and a planarization, and a high frequency current is applied to the horizontal deflection coil HC, In high resolution monitors, there is a problem that it is difficult to simultaneously adjust the orthogonality and crosstalk.

That is, since the orthogonality and the cross talk are complementary to each other in the mechanical state of the deflection yoke DY, the deflection yoke DY cannot be manufactured considering only one of the deflection yokes. ), So that the orthogonality of the deflection yoke is improved, the crosstalk is increased, and if the crosstalk is reduced, the orthogonality is deteriorated.

Accordingly, an object of the present invention is to provide a crosstalk correction apparatus for a deflection yoke capable of effectively correcting crosstalk and orthogonality of a deflection yoke separately.

In order to achieve the above object, the deflection yoke crosstalk correction device according to the present invention is characterized by a neck portion and a screen portion, and a deflection in which a pair of vertical and horizontal deflection coils are installed inside and outside the coil separator, respectively. In yoke; In the predetermined region of the screen unit, a fixing member having a nut nut for fastening the crosstalk compensating device is provided, and after winding the crosstalk compensating correction coil on the outer periphery of the bobbin surrounding the bolt of the crosstalk compensating device, the bolt Is coupled to the nut groove to adjust the distance with the vertical deflection coil to attenuate the cross torque induced in the vertical deflection coil by the leakage magnetic field of the horizontal deflection coil.

Hereinafter, with reference to the accompanying drawings will be described in detail the crosstalk correction apparatus according to the present invention.

As shown in FIGS. 6 and 7, the cross talk compensator 20 according to the present invention is composed of a coil 22 wound around the bobbin 210 a predetermined number of times, and the coil 22 is made of an eighth. As shown in Fig. 9, a pair of vertical deflection coils VC are connected directly in series, and as shown in Fig. 9, the coil 22 is a leakage magnetic field of the horizontal deflection coil HC. Direction in which the crosstalk Vt induced by the vertical deflection coil VC is offset by the residual voltage Vct induced by the coil 22, for example, the leakage magnetic field of the horizontal deflection coil HC. Is wound in the direction passing through the center of the coil 22 and is provided in the deflection yoke DY.

That is, the crosstalk correction device 20 is a fastening member, for example, a fixing member having a bolt 23 formed on one side of the bobbin 21 mounted on the screen portion 12 of the deflection yoke DY. It is fixed to the nut 24 of (25).

In addition, as shown in FIG. 10, when the distance between the coil 22 and the leakage magnetic field of the horizontal deflection coil HC is adjusted with the bolt 33, the voltage induced in the coil 22 ( Vct) can be adjusted so that the crosstalk Vt generated in the vertical deflection coil VC can be effectively offset by the leakage magnetic field of the horizontal deflection coil HC due to the mechanical unbalance of the deflection yoke DY. have.

Therefore, crosstalk, which is a residual voltage induced in the vertical deflection coil by receiving the leakage magnetic field of the horizontal deflection coil due to the mechanical imbalance of the deflection yoke, can be corrected irrespective of the orthogonality. In other words, if the deflection yoke is manufactured considering only the orthogonality, the orthogonality can be improved, and the crosstalk can be adjusted by using the crosstalk compensator when the deflection yoke is assembled.

As described above, according to the crosstalk correction device of the deflection yoke, a coil connected in series with the vertical deflection coil of the deflection yoke is formed in a direction capable of canceling the crosstalk, and the leakage magnetic field caused by the horizontal deflection coil. It is possible to adjust the residual voltage induced in the correction coil by fixing the bolt and nut to the fixing member mounted on the screen of the deflection yoke so that the penetrating the center portion.

Therefore, this design has the advantage that the orthogonality and cross torque formed by the mechanical imbalance of the deflection yoke can be easily corrected separately.

Claims (1)

In the deflection yoke which consists of the neck part 11 and the screen part 12, and a pair of vertical and horizontal deflection coils are provided in the coil separator 13 inside and outside, respectively; In the predetermined region of the screen portion 12, a fixing member 25 having a groove for the nut 24 of the crosstalk correcting device 20 is provided, and the bolt 23 of the crosstalk correcting device 20 is provided. After winding the correction coil 22 for cross torque correction on the outer circumference of the bobbin 21, the bolt 23 is coupled to the groove of the nut 24 to adjust the distance with the vertical deflection coil. The crosstalk correction device of the deflection yoke, characterized by attenuating crosstalk induced in the vertical deflection coil by a leakage magnetic field.