KR100193561B1 - Leakage magnetic field shielding and distortion correction device of deflection yoke - Google Patents

Abstract

The present invention relates to a leakage magnetic field shielding and distortion correcting apparatus for a deflection yoke, which minimizes a leakage magnetic field of a remaining amount generated in a horizontal flat coil and at the same time, A drum core in which an induction coil is wound is mounted and a leakage magnetic field canceling coil wound around the magnetic piece is mounted so as to face the horizontal deflection coil of the deflection yoke in the X axis direction, The leakage magnetic field cancellation coil can be easily installed at any position of the neck portion and the screen portion, that is, in a position where the leakage magnetic field can be canceled, and the leakage generated in the horizontal flat coil The magnetic field can be reliably shielded to minimize the magnetic field of the harmful frequency component to the human body of the user using the monitor Ron orthogonal view of the amplitude and sensitivity of the coil separator in the horizontal deflection coil it is possible to improve the productivity and assembly of the deflection yoke are aligned properly.

Description

Leakage magnetic field shielding and distortion correction device of deflection yoke

Figure 1 is a front view of a typical saddle-toroidal deflection yoke;

FIG. 2 is a bottom view of a state in which a leakage magnetic field canceling coil for shielding a leakage magnetic field generated in a conventional horizontal deflection coil is mounted.

FIG. 3 is a perspective view and a main part enlarged view showing a leakage magnetic field shielding and distortion correcting device of a deflection yoke according to the present invention; FIG.

FIG. 4 is a bottom view of the leakage magnetic field shielding and distortion correcting device of the deflection yoke according to the present invention. FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

10: deflection yoke 11: neck portion

12: Screen portion 13: Coil separator

14: horizontal deflection coil 15: vertical deflection coil

16: Perforator core 16a: Square groove

17: core clamps 18, 22: magnetic field canceling coil

19, 23: Bobbin 20: Induction coil

21: DRUM core 24: magnetic piece

The present invention relates to a leakage magnetic field shielding and distortion correcting apparatus for a deflection yoke, and more particularly, to a deflection yoke shielding and distortion correcting apparatus using a deflection yoke for shielding a leakage magnetic field (VLMF: Very Low Frequency Magnetic Field) And more particularly, to a leakage magnetic field shielding and distortion correcting device for a deflection yoke capable of minimizing harmful frequency components affecting the human body and correcting distortion generated on the screen.

Generally, a cathode ray tube (CRT) of a TV set or a monitor is equipped with a deflection yoke for deflecting an electron beam scanned by an electron gun, thereby deflecting an electron beam scanned in a certain manner to form a screen. At this time, the electron beam scanned by the electron gun is deflected in the tube by the horizontal and vertical deflection coils of the deflection yoke, and the leakage magnetic field of the remaining amount generated in the horizontal deflection coil leaks out the leak magnetic field, A user who uses a display device has an effect of VDT (Visual Display Twemonal Syndrome) syndrome, so that it is emphasized that it is necessary to correct the distortion occurring on the screen and to erase or shield the distortion.

As shown in FIG. 1 and FIG. 2, the conventional deflection yoke for shielding harmful electromagnetic waves generated in a TV or monitor and correcting distortion has a neck portion 11 and a coil portion 12 composed of a screen portion 12 A horizontal deflection coil 14 is mounted on the inner side of the separator 13 among the deflection coils wound by a coil winding machine (not shown), and a pair of vertical deflection coils 15 wound on the outer side of the coil separator 13 Theperator core (16) is coupled by a core clamp (17).

On the other hand, the electron beam scanned in the electronic layer (not shown) is deflected by the horizontal deflection coil 14 in a tube (not shown) of the deflection yoke 10 and shields the remaining leakage magnetic field leaking around the monitor The bobbin 19 on which the leakage magnetic field canceling coil 18 is wound is fixed on the upper surface of the screen portion 12 of the deflection yoke 10 so as to be inclined at a predetermined angle in order to correct the distortion occurring on the screen. At this time, the mounting position of the leakage magnetic field canceling coil 18 wound on the bobbin 19 is mounted so as to be opposed to the both sides of the screen portion 12 in the Y-axis direction about the horizontal deflection coil 14, The coil 18 generates a inverse magnetic field, which is a magnetic field opposite to the magnetic field of the horizontal deflection coil 14, and connects the horizontal deflection coil 14 and the horizontal deflection coil 14 in series so that the leakage magnetic field is canceled.

The conventional leakage magnetic field shielding and distortion correcting apparatus configured as described above is constructed so that R (red), G (green), and G (green) beams scanned by the electron gun by the horizontal 14 and vertical deflection coils 15 of the deflection yoke 10 mounted on the cathode- ) And B (blue) are deflected and scanned at a fixed vertex on the screen, and the leakage magnetic field canceling coils 18 mounted on both sides of the screen unit 12 by the main magnetic field generated in the horizontal deflection coil 14 The leakage magnetic field of the remaining amount which is induced to the periphery of the monitor by the magnetic field is canceled by the inverse magnetic field generated in the leakage magnetic field canceling coil 19 to minimize the magnetic field of the harmful frequency component, The magnetic field induced in the horizontal deflection coil 14 advances in the same direction as that of the horizontal deflection coil 14 to correct the distortion.

However, in order to prevent the leakage magnetic field of the remaining amount generated in the horizontal deflection coil and correct the distortion occurring on the screen as described above, the bobbin having the leakage magnetic field canceling coil wound on both sides of the screen portion of the coil separator is mounted at a predetermined angle, Since the current of the deflection coil is used as the induction current of the leakage magnetic field canceling coils, it is difficult to adjust the angle when the bobbin having the leakage magnetic field canceling coils wound to cancel the leakage magnetic field is attached to both sides of the screen portion at a predetermined angle. The inverse magnetic field of the leakage magnetic field canceling coils wound on the bobbin due to the interference of the induction magnetic field can not properly shield the leakage magnetic field and can not easily cancel out the leakage magnetic field changing with time, The sensitivity and the orthogonality of the coil separator can not be precisely adjusted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to minimize the leakage magnetic field of the remaining amount generated in the horizontal flat coil and to reduce the distortion generated on the screen, A drum core in which an induction coil is wound, and a leakage magnetic field canceling coil wound around the magnetic piece so as to face the horizontal deflection coil in the X axis direction are wired in series or in parallel The leakage magnetic field canceling coils for canceling the leakage magnetic field can be easily installed at any position of the neck portion and the screen portion, that is, in a range where the leakage magnetic field can be canceled, The leakage magnetic field is reliably shielded to minimize the magnetic field of the harmful frequency component to the human body of the user who uses the monitor And to provide an apparatus and method for correcting leakage magnetic field autonomy and distortion of a deflection yoke that can accurately shape the amplitude and sensitivity of a horizontal deflection coil and the orthogonality of a coil separator to form a deflection yoke.

According to another aspect of the present invention, there is provided a leakage magnetic field shielding apparatus for a deflection yoke, comprising: a horizontal deflection coil mounted on an inner side of a coil separator; The deflection yoke has a rectangular groove formed at a lower end of a ferrite core of the deflection yoke. The deflection yoke has a rectangular waveguide, A member; And a leakage magnetic field shielding means connected to the guide member and mounted around the neck portion of the deflection yoke or the screen portion so that the leakage magnetic field and distortion generated in the shoe pair deflection coil are simultaneously removed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a leakage magnetic field shielding and dispersion correction device for a deflection yoke according to the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 are views showing a leakage magnetic field shielding and correcting device of a deflection yoke according to the present invention. The deflection yoke 10 is formed of a coiled separator 13 having a neck portion 11 and a screen portion 12, A pair of ferrite core 16 in which a horizontal deflection coil 14 is mounted and a vertical deflection coil 15 is wound outside the coil separator 13 is mounted on a core clamp 17 A rectangular groove 16a is formed at the lower end of the ferrite core 16 and a drum core 21 in which an induction coil 20 is wound is mounted in the square groove 16a .

The bobbin (22) wound around the leakage magnetic field canceling coil (22) is wound on the upper surface of the screen portion (12) of the deflection yoke (10) so as to shield the residual magnetic field leaking from the main magnetic field of the horizontal deflection coil Permeable magnetic surface 24 is sandwiched between the bobbin 23 and the induction coil 20 wound around the drum core 21 and the leakage magnetic field canceling coil 22 are connected to each other.

The shape of the magnetic piece 24 to which the bobbin 23 is fitted can be changed in shape such as a square bar or a round bar while the direction and width of the leakage magnetic field canceling coil 22 wound on the bobbin 23 are changed It is possible to change the range within which the leakage magnetic field generated in the coil 14 can be shielded.

The apparatus for correcting the leakage magnetic field shielding and distortion of the deflection yoke according to the present invention constructed as described above is characterized in that the deflection yoke 10 mounted on the cathode ray tube 10 has a horizontal deflection coil 15 and horizontal deflection coils 15, , The B 3 electron beam is deflected and scanned to a fixed vertex on the screen and a current is applied to the horizontal deflection coil 14, the square deflection coil 14 The induction magnetic field is guided to the opposite side of the screen unit 12, that is, the leakage magnetic field around the bobbin 23 mounted in the X-axis direction, And is led to the canceling coil 22.

Therefore, the current applied to the horizontal deflection coil 14 is used as the main current, and the induction coil 20 of the drum core 21 mounted on the ferrite core 16 is induced in the main current generated in the main current A reverse magnetic field in a direction opposite to the leakage magnetic field direction of the horizontal deflection coil 14 is generated by the magnetic field induced in the leakage magnetic field canceling coil 22 connected to the induction coil 20 and is generated in the horizontal deflection coil 14 It is possible to minimize the leakage magnetic field of the remaining amount, that is, the magnetic field of the harmful frequency component canceled by harmful electromagnetic waves, and to easily correct the distortion generated on the screen.

As described above, according to the leakage magnetic field shielding and distortion correcting apparatus of the deflection yoke according to the present invention, a square groove is formed at the lower end of the ferrite core, a drum core having the induction coil wound around the square groove is mounted, A leakage magnetic field canceling coil wound around the magnetic piece is disposed so as to be opposed to the X-axis direction around the horizontal deflection coil of the user, so that the leakage magnetic field generated in the horizontal deflection coil changing with time can be reliably shielded, The magnetic field of harmful frequency components can be minimized, and the assembly and productivity of the deflection yoke can be improved by exactly matching the amplitude and sensitivity of the horizontal deflection coil with the orthogonality of the coil separator

.

Claims (4)

A leakage magnetic field shielding and distortion correcting device provided so as to correspond to a Y axis of a screen portion with respect to a horizontal deflection coil mounted inside a coil separator so as to cancel a leakage magnetic field generated in a horizontal deflection coil, An induction member formed in the square groove to be able to induce a magnetic field generated in the horizontal deflection coil; And a leakage magnetic field shielding means connected to the guide member and mounted around the neck portion of the deflection yoke or the screen portion so that the leakage magnetic field and distortion generated in the horizontal deflection coil are simultaneously removed. The apparatus of claim 1, wherein the guide member comprises a dream core having an induction coil wound so as to induce a main magnetic field generated in the horizontal deflection coil. 2. The apparatus according to claim 1, wherein the leakage magnetic field shielding means comprises a horizontal deflection coil for shielding a leakage magnetic field generated in the horizontal deflection coil and for correcting distortion occurring on the screen, And a leakage magnetic field canceling coil wound around the bobbin on both sides of the screen portion, and a leakage magnetic field shielding and distortion correcting device for the deflection yoke. 4. The deflection yoke according to any one of claims 1 to 3, wherein the mounting position of the leakage magnetic field shielding means is a position of the deflection yoke fixed to the neck portion of the deflection yoke and the screen portion within a range in which the leakage magnetic field and distortion generated in the horizontal deflection coil can be removed Leakage magnetic field shielding and distortion correction device.