KR100405209B1 - Apparatus for preventing element distortion of deflection yoke - Google Patents

Abstract

The present invention provides a device for preventing deformation and smoke of the deflection yoke, comprising: first to sixth comafree coils electrically connected in series with a vertical coil main part; A YHC misconvergence adjustment unit connected in parallel to the first to fourth comaprire coils and controlling misconvergence of the screen yarn by controlling a relative amount of current flowing through the first to fourth comaprire coils; A YV misconvergence adjustment unit connected in parallel to the fifth and sixth comaprider coils and controlling a relative amount of current flowing through the fifth and sixth comaprider coils to adjust vertical misconvergence of the screen; And a protection resistor connected to the contact point of the first coma prim coil and the YHC misconvergence adjusting unit and the contact point of the sixth coma prim coil and the YV misconvergence adjusting unit so that a current flowing in the YHC misconvergence adjusting unit is dispersed and input. In this way, it is possible to improve the reliability of the deflection yoke misconvergence correction device by preventing element deformation due to heat generation and smoke generation in each circuit element of the deflection yoke misconvergence correction device during the open short test.

Description

Apparatus for preventing element distortion of deflection yoke

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for correcting miss convergence of deflection yoke, and in particular, to heat and smoke generated in each circuit element of the misconvergence correction device of deflection yoke during an open short test. The present invention relates to a device for preventing deformation of a deflection yoke, which is suitable for preventing device deformation caused by deformation and improving the reliability of the misconvergence correction device of the deflection yoke.

Generally, deflection yoke is a device for deflecting an electron beam emitted from an electron gun of a cathode ray tube. Coma Free is the VCR (Ver.Center Raster) characteristic of deflection yoke, ie the center of red (R) / blue (B) and green (G) vertical misalignments at the measuring point on the vertical axis of the cathode ray tube. It makes the convergence sensitivity good.

In addition, misconvergence in the deflection yoke is displayed on the screen due to landing error, distortion error, and VCR distortion. This landing error refers to a misconvergence in which the electron beams R, G, and B scanned from the electron gun are not accurately scanned at each pixel on the screen, and are scanned from each pixel to the center of the screen or to the edge of the screen. (narrow) means misconvergence in a widened state.

In addition, the distortion error is a misconvergence in which the electron beams B, G, and R are scanned on the screen out of the upper and lower sides of the screen, or are driven to the center of the screen to prevent the beam from being scanned at the edges. It means the misconvergence of the barrelized or pinned state.

In addition, the VCR distortion is a misconvergence in which the red beam R and the blue beam B are accurately scanned on the screen, whereas the green beam G is not accurately scanned on each pixel of the screen, and an error occurs in the vertical direction.

1 is a circuit diagram of an apparatus for correcting misconvergence in such a conventional deflection yoke.

As shown in the figure, the first to sixth coma prim coils 51 to 56 are electrically connected to each other in series with respect to the vertical coil main part 10. The YHC misconvergence adjustment unit 20 is connected in parallel to the first to fourth coma prefer coils 51 to 54, and the YHC misconvergence adjustment unit 20 includes the first and second coma prefer coils 51 ( 52) and to adjust the misconvergence on the screen by controlling the relative amount of current flowing to the third and fourth comma-free coils 53 and 54 side. In addition, YV misconvergence adjustment unit 30 is connected in parallel to the fifth and sixth comaprider coils 55 and 56, and such YV misconvergence adjustment unit 30 is the fifth and sixth comapriator coils 55. This is to adjust the vertical misconvergence (YV) of the screen by controlling the relative amount of current flowing in 56.

In addition, the first and second correction coils 61 and 62 are connected in series to the contacts of the cathode terminal of the first diode D1, the sixth comma-free coil 56, and the YV misconvergence adjustment unit 30, and the third And the fourth correction coils 63 and 64 are connected in series to the anode terminal of the second diode D2, the sixth comma-preil coil 56, and the contact point of the YV misconvergence adjustment unit 30.

In addition, the first and second diodes D1 and D2 are connected in parallel with each other in reverse polarity, and the YH variable resistor YH VR 40 has a cathode terminal of the first diode D1 and a second diode D2. The third and fourth resistors R3 and R4 are connected in series and are connected to the YH variable resistor 40 (YH VR) 40 in parallel, and are connected to the first and second coils. 71 and 72 are connected in series between the connection point between the third and fourth resistors R7 and the anode terminal of the first diode D1 and the cathode terminal of the second diode D2.

Thus, the sawtooth voltage input by adjusting the vertical deflection magnetic field through the vertical coil main part 10 is inputted to the first to sixth comafree coils 51 to 56. Then, the YHC misconvergence adjusting unit 20 adjusts the misconvergence on the screen by controlling the relative amount of current flowing through the first to fourth coma prim coils 51 to 54, and the YV misconvergence adjusting unit 30 is the fifth and the fifth. 6 Adjusts the relative amount of current flowing through the comapri coils 55 and 56 to adjust the vertical misconvergence of the screen.

At this time, when the first to sixth comaprire coils 51 to 56 are opened by force or PCB inspection, the current flowing in the vertical coil main part 10 is YHC variable resistance (YHC VR) of the YHC misconvergence adjusting part 20. To flow.

However, in the conventional apparatus, when the coma-free coils 51 to 56 are opened by force or PCB inspection, the current flowing in the vertical coil main part 10 flows to the YHC variable resistor (YHC VR) so that the YHC variable resistor generates heat. As a result of this heat generation, the comafree coils 51 to 56 are deformed or even smoked, thereby degrading the reliability of the circuit.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to deform the element by heat generation and smoke generated in each circuit element of the misconvergence correction device of the deflection yoke during the open short test. The present invention provides a device for preventing deformation of a deflection yoke, which can improve the reliability of a deflection yoke misconvergence correction device.

1 is a circuit configuration diagram of a conventional misconvergence correction apparatus of a deflection yoke;

2 is a circuit diagram of a device for preventing deformation of a deflection yoke according to the present invention;

<Description of the code | symbol about the principal part of drawing>

10: vertical coil main part 20: YHC misconvergence adjusting part

30: YV misconvergence adjusting unit 40: YH variable resistor

51 to 56: Comafree coil 61 to 64: correction coil

71, 72: coil 80: protection resistor

D: Diode R: Resistance

VR: Variable resistor

Device for preventing deformation of the deflection yoke according to an embodiment of the present invention to achieve the above object, the first to sixth comma-free coil electrically connected in series with the vertical coil main portion; A YHC misconvergence adjustment unit connected in parallel to the first to fourth comaprire coils and controlling misconvergence of the screen yarn by controlling a relative amount of current flowing through the first to fourth comaprire coils; A YV misconvergence adjustment unit connected in parallel to the fifth and sixth comaprider coils and controlling a relative amount of current flowing through the fifth and sixth comaprider coils to adjust vertical misconvergence of the screen; And a protection resistor connected to the contact point of the first coma prim coil and the YHC misconvergence adjusting unit and the contact point of the sixth coma prim coil and the YV misconvergence adjusting unit so that a current flowing in the YHC misconvergence adjusting unit is dispersed and input. It is characterized by the technical configuration.

Hereinafter, an embodiment according to the present invention as described above, the technical spirit of the device for preventing deformation of the deflection yoke with reference to the drawings as follows.

2 is a circuit diagram of a device for preventing deformation of a deflection yoke according to the present invention.

As shown therein, the first to sixth comafree coils 51 to 56 electrically connected in series with the vertical coil main part 10; YHC misconvergence, which is connected in parallel with the first to fourth coma prim coils 51 to 54 to control the relative amount of current flowing through the first to fourth coma prim coils 51 to 54 to adjust misconvergence of the screen company. An adjusting unit 20; Vertical misconvergence (YV) of the screen by controlling the relative current flow in parallel with the fifth and sixth comaprider coils 55 and 56 and flowing through the fifth and sixth comaprier coils 55 and 56. YV misconvergence adjustment unit 30 for adjusting the; The YHC misconvergence adjustment unit 30 is connected to a contact point of the first coma prime coil 51 and the YHC misconvergence adjustment unit 20 and a contact point of the sixth comaprime coil 56 and the YV misconvergence adjustment unit 30. 20 is configured to include a protection resistor unit 80 so that the current flowing through the dispersion is input.

Wherein reference numeral 40 is a YH variable resistor, 61 to 64 are correction coils, 71 and 72 are coils, D1 and D2 are diodes, and R1 to R5 are resistors.

The operation of the device for preventing deformation of the deflection yoke according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, in FIG. 2, the first to sixth comafree coils 51 to 56 are connected in series to the vertical coil main part 10. The first to sixth comafree coils 51 to 56 are electrically connected in series with each other, and the upper left side, upper right side, lower left side and lower right side of the outer surface of the neck of the coil separator via an E-shaped iron piece. It is preferable that the windings are installed so as to be electrically connected to the left middle side and the right middle side, so as to obtain a six-pole magnetic field for coma aberration correction. Preferably, the first to sixth comafree coils 51 to 56 are all wound in the same direction, but the first and second comafree coils 51 and 52 that are upper comapriate coils and the lower comaprile coils are formed. The winding directions of the third and fourth comapriate coils 53 and 54 may be the same, and the winding directions of the fifth and sixth comaprie coils 55 and 56 that are the middle comapriate coils may be reversed. The former winding method cancels the magnetic fields of the upper comapricoils 51 or 52 and the lower comapricoils 53 or 54 when the magnetic field of the middle comapricoil 55 or 56 becomes stronger. May weaken. For example, when the magnetic field of the left middle coma precoil 55 is strengthened, the magnetic fields of the upper left and lower left coma precoils 51 and 53 are weakened, so that the upper right and lower right sides 52 and 54 are relatively weak. The magnetic field is strengthened. The latter winding method is opposite to the magnetic field formation by the former winding method.

And YHC misconvergence adjustment part 20 is connected in parallel with the 1st-4th comafree coils 51-54. The YHC misconvergence adjusting unit 20 controls the relative amount of current flowing to the first and second comapriate coils 51 and 52 and the third and fourth comaprie coils 53 and 54 to control the misconvergence on the screen. To adjust. The YHC misconvergence adjusting unit 20 includes a YHC variable resistor (YHC VR) connected in parallel with the first to fourth coma prim coils 51 to 54, a second coma prim coil 52, and a third coma prim coil. And a first fixed resistor R1 connected between the common contact with 53 and the movable electrode of the YHC variable resistor YHC VR.

In addition, the YV misconvergence adjustment unit 30 is connected in parallel to the fifth and sixth comaprider coils 55 and 56. The YV misconvergence adjusting unit 30 adjusts the vertical misconvergence (YV) of the screen by controlling the relative amounts of current flowing through the fifth and sixth comaprider coils 55 and 56. The YV misconvergence adjustment unit 30 has a common YV variable resistor (YV VR) connected in parallel with the fifth and sixth comma-free coils 55 and 56 and the fifth and sixth comma-free coils 55. And a second fixed resistor R2 connected between the contact and the movable electrode of the YV variable resistor YV VR.

In addition, the misconvergence correction apparatus of the deflection yoke includes the first to fourth correction coils 61 to 64 connected in series to the contact points of the sixth coma prim coil 56 and the YV misconvergence adjustment unit 30.

Furthermore, a YH variable resistor (YH VR) connected between the first and second diodes D1 and D2 connected in parallel with each other in reverse polarity, and between the cathode terminal of the first diode D1 and the anode terminal of the second diode D2. 40 between the third and fourth resistors R3 and R4 connected in series and connected to the YH variable resistor (YH VR) 40 in parallel, and between the third and fourth resistors R7. And first and second coils 71 and 72 connected in series between the connection point and the anode terminal of the first diode D1 and the cathode terminal of the second diode D2.

Here, the first and second correction coils 61 and 62 are connected in series to the contacts of the cathode terminal of the first diode D1, the sixth comma-preil coil 56, and the YV misconvergence adjustment unit 30. And the fourth correction coils 63 and 64 are connected in series to the anode terminal of the second diode D2, the sixth comma-preil coil 56, and the contact point of the YV misconvergence adjustment unit 30.

Thus, the sawtooth voltage input by adjusting the vertical deflection magnetic field through the vertical coil main part 10 is inputted to the first to sixth comafree coils 51 to 56. Then, the YHC misconvergence adjusting unit 20 adjusts the misconvergence on the screen by controlling the relative amount of current flowing through the first to fourth comafree coils 51 to 54. In addition, the YV misconvergence adjustment unit 30 adjusts the vertical misconvergence (YV) of the screen by controlling the relative amount of current flowing through the fifth and sixth comma-free coils 55 and 56.

At this time, when the first to sixth comaprire coils 51 to 56 are opened by force or PCB inspection, the current flowing in the vertical coil main part 10 is YHC variable resistance (YHC VR) of the YHC misconvergence adjusting part 20. To the resistance R5 of the protection resistor unit 80 and flows.

Then, since the current is distributed and transmitted to the YHC variable resistor (YHC VR) and the protection resistor unit 80, the occurrence of deformation or smoke generation of the YHC VR due to the heating of the YHC variable resistor (YHC VR) is prevented.

As such, the present invention prevents device deformation due to heat generation and smoke generation in each circuit element of the misconvergence correction device of the deflection yoke during the open short test.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the device for preventing deformation of the deflection yoke according to the present invention prevents device deformation due to heat generation and smoke generated in each circuit element of the misconvergence correction device of the deflection yoke during the open short test. There is an effect that can improve the reliability of the convergence correction device.

Claims (1)

Control the relative amount of current flowing through the first to sixth comaprire coil and the first to sixth comaprire coils electrically connected in series with the vertical coil main unit and parallel to the first to fourth comaprile coil YHC misconvergence adjustment unit for adjusting the misconvergence of the screen company and the relative current amount flowing through the fifth and sixth comaprire coils in parallel with the fifth and sixth comaprial coils to control vertical misconvergence of the screen. In the deflection yoke provided with the YV misconvergence adjustment part to adjust, One end is connected to the contact point of the first comaprire coil and the YHC misconvergence adjustment unit and the other end is connected to the contact point of the sixth comaprire coil and the YV misconvergence adjustment unit to open the test of the deflection yoke. A device for preventing deformation of a deflection yoke, comprising: a protection resistor for protecting a circuit element by dissipating current flowing in the circuit to prevent heat and smoke.