JPH11164313A - Degaussing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To degauss even a magnetized component in a tube face direction by degaussing a magnetized component in a vertical direction on the tube screen of a color cathode ray tube. SOLUTION: A degaussing coil 17 is formed to be a loop and configured with a 1st winding coil 21 wound on a laterally long rectangular frame along an outer circumference of a color cathode ray tube and a 2nd winding coil 22 wound on the 1st winding coil 21 as a winding frame orthogonal to the 1st winding coil 21 made of a same wire material (e.g. a conductor wire with insulation around it).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a degaussing device for degaussing a color CRT used in a color television receiver or a color monitor.

[0002]

2. Description of the Related Art Conventionally, in a color cathode ray tube used for a color television receiver or a color monitor device, since an electron beam must accurately land on the center of a phosphor, a degaussing current is applied to a degaussing coil. The demagnetization of the panel surface and the shadow mask was performed.

FIG. 10 is a side view showing a color cathode ray tube provided with a conventional degaussing device for performing such degaussing.

In FIG. 10, a color cathode ray tube 8 is
A panel surface 8 having a predetermined curvature through a funnel portion 82 extending at a predetermined angle from a narrow neck portion 81 and a frame portion 83.
4 is constituted. R (red), G (green),
B (blue) three-color electron guns are arranged in a predetermined arrangement.

[0005] In addition, a funnel portion 82 extends from a neck portion 81.
Electromagnetic deflecting components such as a color purity adjusting magnet and a deflection yoke 85 (not shown) are provided outside the electron gun, and a red electron beam, a green electron beam,
The blue electron beam is deflected around the deflection center of the deflection yoke.

On the other hand, on the rear surface side of the panel surface 84, a large number of phosphors are formed in a film shape corresponding to a three-color electron beam with one set of three colors. A shadow mask 86 is attached to the electron gun by a predetermined distance from the surfaces of these phosphors via a frame. The shadow mask 86 is provided with a number of holes corresponding to the phosphors.

A demagnetizing coil 87 is wound around a position corresponding to the shadow mask 86 outside the frame 83.

The degaussing coil 87 is supplied with a degaussing current for degaussing the color cathode ray tube 8, and generates magnetic fields B8 and D8 on the panel surface 84 of the color cathode ray tube 8 that are substantially parallel to the tube axis.

FIG. 11 is a front view showing the degaussing coil 87 of FIG.

In FIG. 11, a demagnetizing coil 87 is formed by winding a conductor whose outer periphery has been subjected to insulation treatment in a horizontally long rectangular shape along the outer periphery of a frame-shaped portion 83 in FIG. One end and the other end of the degaussing coil 87
Are connected to one and the other terminals. Connector 88
Are connected to a degaussing circuit 103 described later.

The left side 91, the upper side 92, the right side 93, and the lower side 94 of the degaussing coil 87 are caused by the current i8 to be on the panel surface 84.
And the magnetic field A8 in the same direction with respect to the shadow mask 86,
B8, C8, and D8 are generated, respectively.

FIG. 12 is a circuit diagram showing a circuit system for supplying a demagnetizing current to such a degaussing coil 87.

In FIG. 12, reference numeral 101 denotes an AC outlet of a television receiver. One terminal of the AC outlet 101 is connected to one terminal of a power switch 102. The other terminal of the power switch 102
AC outlet 1 via resistor R81 of degaussing circuit 103
01 is connected to the other terminal of the degaussing circuit 10
3 is connected to the other terminal of the AC outlet 101 via a DC connection between the variable resistor VR81 and the degaussing coil 87.

When the power switch 102 is turned on, the variable resistance VR81 of the demagnetizing circuit 103 changes from a low resistance state to a high resistance state with time.

FIG. 13 is a waveform diagram showing a current flowing through the degaussing coil 87 by the degaussing circuit 103 of FIG.

In FIG. 13, a timing t0 is a timing at which the power switch 102 is turned on.
The current flowing through 7 becomes an alternating current whose amplitude attenuates with time from the timing t0.

In such a color cathode ray tube 8, an alternating current that attenuates with time is applied to the degaussing coil 87 by the degaussing circuit 103, and the shadow mask 86 and the panel surface 8 are deactivated.
Demagnetization is performed by applying an AC magnetic field that attenuates with time to 4.

In such a conventional degaussing apparatus, the panel surface and the shadow mask can be degaussed, but the funnel can not be degaussed.

To cope with this, a degaussing device capable of degaussing the funnel has been developed.

FIG. 14 is a side view showing a conventional color cathode ray tube provided with a degaussing device capable of degaussing the funnel portion. The same components as those in FIG. ing.

In FIG. 14, the degaussing coil 111 is wound at an angle θ0 from the upper side of the frame portion 83 to the rear along the funnel portion 82 at an angle θ0 to form an upper loop portion 112 and a lower surface of the funnel portion 82. A lower loop portion 113 is formed.

The degaussing coil 111 is supplied with a degaussing current for degaussing the color cathode ray tube 110, and generates magnetic fields B9 and F9 on the panel surface 84 of the color cathode ray tube 110 that are substantially parallel to the tube axis. In this case, the magnetic fields B9 and F9 are in opposite directions. Further, the degaussing coil 111 of the color cathode ray tube 110 generates a magnetic field D9 which is perpendicularly incident on the tube surface of the funnel unit 82.

FIG. 15 is a front view showing the degaussing coil of FIG.

In FIG. 15, the degaussing coil 111 is formed in an eight-shape by an upper loop portion 112 and a lower loop portion 113. One end and the other end of the degaussing coil 111
Each is connected to one and the other terminal of the connector 120.

The combination of the left side 121, the upper side 122, the right side 123, the lower side 124, and the upper side 134 of the lower loop portion 113 of the upper loop portion 112 Magnetic fields A9, B9, C9, D9 in the same direction are respectively generated.

The left side 131, the lower side 132, the right side 133 of the lower loop 113, the upper 134 and the upper loop 1
The combination of the lower side 124 of 12 is determined by the current i9.
Magnetic field D in the same direction with respect to the inside of lower loop portion 113
9, E9, F9, and G9, respectively.

In such a color CRT 110,
The demagnetizing circuit supplies an alternating current to the demagnetizing coil 111 with time to the panel surface 84 and the shadow mask 8.
6. Demagnetization is performed by applying an AC magnetic field that attenuates with time to the funnel unit 82.

Here, the color cathode ray tube is magnetized at random according to the direction of the terrestrial magnetism (the direction of the television receiver) and the direction of the external magnetic field. Therefore, FIG.
In the degaussing apparatus shown in FIG. 15 to FIG. 15, it becomes possible in the direction perpendicular to the tube surface, but in the direction of the tube surface, the magnetized component remains, and the color purity of the color television receiver or the color monitor decreases. There was a problem of doing.

[0029]

According to the above-mentioned prior art, degaussing is possible in the direction perpendicular to the surface of the color cathode ray tube, but in the direction of the surface of the tube, a magnetized component remains, and the color television is left untouched. There has been a problem that the color purity of a John receiver or a color monitor device is reduced.

The present invention eliminates the above-mentioned problems, and provides a degaussing apparatus capable of demagnetizing a magnetized component in a vertical direction on a tube surface of a color cathode-ray tube and also demagnetizing a magnetized component in a tube surface direction. With the goal.

[0031]

A degaussing apparatus according to the present invention is a degaussing apparatus for degaussing a color cathode ray tube,
A first winding coil formed in a loop shape and attached to a predetermined position of the color cathode ray tube; and a first winding coil having the first winding coil as a core and wound orthogonally to the first winding coil. And a demagnetizing current supply means for supplying a demagnetizing current to the first and second winding coils.

[0032]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show a first embodiment of a degaussing device according to the present invention. FIG. 1 is a front view showing a degaussing coil, and FIG. 2 shows a color cathode ray tube provided with a degaussing device. FIG. 3 is a circuit diagram showing a circuit system for flowing a degaussing current to the degaussing coil.

First, an overall description will be given with reference to FIG.

In FIG. 2, the color cathode ray tube 1 has a funnel portion 1 which extends at a predetermined angle from a small diameter neck portion 11.
2. A panel surface 14 having a predetermined curvature through the frame portion 13
Is configured. R (red), G (green), B
The (blue) three-color electron guns are arranged in a predetermined arrangement.

Also, the neck portion 11 is connected to the funnel portion 12
Electromagnetic deflecting parts such as a color purity adjusting magnet and a deflection yoke 15 not shown are provided on the outside thereof, and a red electron beam, a green electron beam, and a blue electron beam emitted from the above-mentioned electron gun force make the deflection center of the deflection yoke. Deflected as center.

On the other hand, on the back side of the panel surface 14, a large number of phosphors are formed in a film shape corresponding to a three-color electron beam with one set of three colors. A shadow mask 16 is attached to the electron gun by a predetermined distance from the surfaces of these phosphors via a frame (not shown). The shadow mask 16
The number of holes corresponding to the phosphor is formed.

A demagnetizing coil 17 is wound around a position corresponding to the shadow mask 16 outside the frame portion 13.

A degaussing current for degaussing the color cathode ray tube 1 is applied to the degaussing coil 17 to generate magnetic fields B1 and D1 on the panel surface 14 of the color cathode ray tube 1 that are substantially parallel to the tube axis. , Panel surface 1
4 generates a magnetic field X1 that is substantially parallel to X.4.

The degaussing coil 17 will be described in detail.

In FIG. 1, the degaussing coil 17 is formed in a loop shape, and is formed by being wound in a horizontally long rectangular shape along the outer periphery of the frame portion 13 of the color cathode ray tube 1.
And a second winding coil 22 having the first winding coil 21 as a winding core and wound so as to be orthogonal to the first winding coil 21 are the same wire (for example, on the outer periphery). (Insulated wires).

The first winding coil 21 has one end connected to one terminal of the connector 18 and the other end connected to the other terminal of the connector 18 via the second winding coil 22.
One and the other terminals of the connector 18 are connected to a degaussing circuit 43 described later.

The left side 31 and the upper side 3 of the first winding coil 21
2. The right side 33 and the lower side 34 generate the magnetic fields A1, B1, C1, and D1, respectively, which are incident on the panel surface 14 and the shadow mask 16 in the same direction and substantially perpendicular to the panel surface 14 and the shadow mask 16, respectively.

The second winding coil 22 generates a magnetic field X1 directed toward the tube surface with respect to the panel surface 14 and the shadow mask 16 by the current i1.

In this case, the magnetic field X1 generated by the second winding coil 22 is the magnetic field A1 generated by the first winding coil 21.
1, B1, C1, and D1.

In FIG. 3, reference numeral 41 denotes an AC outlet of the television receiver.
Has one terminal connected to one terminal of the power switch 42. The other terminal of the power switch 42 is connected to the degaussing circuit 4
3 is connected to the other terminal of the AC outlet 41 via the resistor R1 of the
AC outlet 4 through the DC connection of
1 is connected to the other terminal.

The variable resistance VR1 of the demagnetizing circuit 43 changes from a low resistance state to a high resistance state with time when the power switch 42 is turned on.

With such a configuration, the first winding coil 21 is formed in a loop shape, and
And the second winding coil 22 is wound around the first winding coil 21 so as to be orthogonal to the first winding coil 21, and the demagnetization circuit 43.
Are demagnetizing current supply means for supplying a demagnetizing current to the first and second winding coils 21 and 22.

In such a color CRT 1, an alternating current that attenuates with time is passed to the degaussing coil 17 by the degaussing circuit 43, and the panel surface 14 and the shadow mask 16 are
Demagnetization is performed by applying an alternating magnetic field in the direction of the tube surface and in the vertical direction that attenuates with time.

According to such an embodiment of the present invention, the first winding coil 21 generates a vertical alternating magnetic field to demagnetize a vertical magnetization component on the panel surface 14 and the shadow mask 16, Since the second winding coil 22 generates an AC magnetic field in the direction of the tube surface and demagnetizes the magnetized component in the direction of the tube surface on the panel surface 14 and the shadow mask 16, the magnetized component in the vertical direction on the tube surface of the color cathode ray tube. As well as demagnetizing the magnetized component in the direction of the tube surface.

FIGS. 4 and 5 show a second embodiment of the degaussing apparatus according to the present invention. FIG. 4 is a side view showing a color cathode-ray tube provided with the degaussing apparatus. FIG. 5 shows a degaussing coil. It is a front view, and the same code | symbol is attached | subjected to the same component as FIGS. 1-3, and description is abbreviate | omitted.

First, an overall description will be given with reference to FIG.

In FIG. 4, the degaussing coil 51 has an angle θ 1 from the upper side of the frame 13 to the rear along the funnel 12.
The upper loop portion 52 is formed while being wound obliquely, and the lower loop portion 53 is formed on the lower surface of the funnel portion 12.
Is formed.

The degaussing coil 51 is supplied with a degaussing current for degaussing the color cathode-ray tube 50, and generates magnetic fields B2 and F2 on the panel surface 14 of the color cathode-ray tube 50 that are substantially parallel to the tube axis. In this case, the magnetic field B
2, F2 are in opposite directions. Further, the degaussing coil 51 of the color cathode ray tube 50 generates a magnetic field D2 which is perpendicularly incident on the tube surface of the funnel unit 12. The degaussing coil 51 generates magnetic fields Y2 and Z2 that are substantially parallel to the panel surface 14 and the tube surface of the funnel unit 12.

In FIG. 5, a demagnetizing coil 51 is formed in a loop shape, and is wound in an eight-shape along the outer periphery of the color cathode-ray tube 1 to form a first winding coil 151.
And a second winding coil 152 wound around the first winding coil 151 as a winding core so as to be orthogonal to the first winding coil 151, using the same wire (for example, the outer periphery is insulated. (Conductive wire).

The degaussing coil 51 is formed in an eight-shape by an upper loop portion 52 and a lower loop portion 53. One end of the first winding coil 151 is connected to one terminal of the connector 60, and the other end is connected to the other terminal of the connector 60 via the second winding coil 152.

The left side 61, the upper side 62, the right side 63, and the lower side 6 of the upper loop portion 52 formed by the first coil 151.
The combination of the upper side 74 with the upper side 74 of the lower loop portion 53 generates magnetic fields A2, B2, C2, and D2 in the same direction with respect to the inside of the upper loop portion 52 by the current i2.

The left side 71, the lower side 72, the right side 73, and the upper side 7 of the lower loop 53 formed by the first coil 151 are formed.
4 and the lower side 64 of the upper loop portion 52 generate magnetic fields D2, E2, F2, and G2 in the same direction with respect to the inside of the lower loop portion 53 by the current i2.

The upper loop 52 formed by the second winding coil 152 generates a magnetic field Y1 in the tube direction with respect to the funnel 12, the panel surface 14, and the shadow mask 16 by the current i2.

The lower loop 53 formed by the second winding coil 152 generates a magnetic field Z1 in the tube direction with respect to the funnel 12, the panel surface 14, and the shadow mask 16 by the current i2.

According to such an embodiment of the present invention, the first winding coil 151 generates a vertical alternating magnetic field, and the vertical magnetization components in the funnel portion 12, the panel surface 14, and the shadow mask 16 are formed. And the second winding coil 152 generates an AC magnetic field in the direction of the tube surface to demagnetize the magnetized components of the funnel portion 12, the panel surface 14 and the shadow mask 16 in the direction of the tube surface.
4 and shadow mask 16 as well as funnel 12
Demagnetization can also be performed on the magnetized component in the direction of the tube surface, and it is possible to prevent the color purity of the color television receiver or the color monitor from being lowered.

FIG. 6 is a front view of a degaussing coil showing a degaussing device according to a third embodiment of the present invention. The other components are the same as those of the embodiment of the invention shown in FIGS.

In FIG. 6, a demagnetizing coil 160 is formed in a loop shape, and is wound around an outer periphery of a frame portion of a color cathode-ray tube in a horizontally long rectangular shape. The first winding coil 161 is used as a winding core, and the second winding coil 162 wound so as to be orthogonal to the first winding coil 161 is formed of an individual wire and connected in parallel. is there.

The first winding coil 161 and the second winding coil 162 are connected in parallel by connection points 163 and 164. The connection points 163 and 164 are connected to the wiring 16 respectively.
5 and 166 are connected to one and the other terminals of the connector 167.

According to such an embodiment of the present invention, since the first winding coil 161 and the second winding coil 162 can be formed of individual wires, the degree of freedom in design increases.

The first winding coil 161 and the second winding coil 162 may be connected in a circuit board or by a connector.

FIG. 7 is a front view of a degaussing coil showing a fourth embodiment of the degaussing device according to the present invention. Other components are the same as those of the first to third embodiments. It has become.

In FIG. 7, a degaussing coil 170 is formed in a loop shape, and is wound around an outer periphery of a frame portion of a color cathode-ray tube in a horizontally long rectangular shape. The first winding coil 171 is used as a winding core, and the second winding coil 172 wound so as to be orthogonal to the first winding coil 171 is formed of an individual wire and connected in parallel. is there.

The first winding coil 171 has one end connected to one terminal of the connector 177 and the other end connected to a connection point 173.
Is connected to one end of the second winding coil 172.
The other end of second winding coil 172 is connected to the other terminal of connector 177.

According to such an embodiment of the present invention, the first winding coil 171 and the second winding coil 172 can be formed of individual wires, so that the same as in the embodiment of the invention of FIG. The effect of is obtained.

The first coil 171 and the second coil 172 may be connected within a circuit board or at a connector.

FIG. 8 is a front view of a degaussing coil showing a fifth embodiment of the degaussing device according to the present invention, and other components are the same as those of the embodiments of FIGS. 1 to 3. It has become.

In FIG. 8, a demagnetizing coil 180 is formed in a loop shape, and is wound around a frame-shaped portion of the color cathode-ray tube in a horizontally elongated rectangular shape. The first winding coil 181 is used as a winding core, and the second winding coil 182 wound orthogonally to the first winding coil 181 is formed continuously with the same wire. In the embodiment of the present invention,
The position where the second winding coil 182 is wound around the first winding coil 181 is defined as a predetermined range.

The first winding coil 181 has one end connected to one terminal of the connector 183 and the other end connected to the other terminal of the connector 183 via the second winding coil 182.

The left side 191, the upper side 192, the right side 193, and the lower side 194 of the first winding coil 181 generate a magnetic field which is substantially perpendicular to the panel surface 14 and the shadow mask 16 in the same direction by the current i 5. .

The second winding coil 182 generates a magnetic field X5 in the direction of the tube surface with respect to the panel surface 14 and the shadow mask 16 by the current i5.

In the embodiment of the present invention, the position where the second winding coil 182 is wound around the first winding coil 181 is set at the center of the left side 191, the upper side 192, the right side 193, and the lower side 194. By adjusting the lengths L51, L52,..., L58 of the positions not wound around the winding coil 181, the magnetic field X5
Field adjustment.

According to the embodiment of the present invention, the same effect as that of the embodiment of the invention shown in FIG. 1 can be obtained, and the length L5 of the position where the first winding coil 181 is not wound is obtained.
By adjusting L1,..., L58, the panel surface 14 is adjusted.
And the magnetic field X directed to the tube surface with respect to the shadow mask 16
In addition, there is an effect that the magnetic field adjustment of 5 can be easily performed, and a device having high demagnetization efficiency can be provided at low cost.

The other components are the same as those of the embodiment of the invention shown in FIGS.

FIG. 9 is a front view of a degaussing coil showing a fifth embodiment of the degaussing apparatus according to the present invention, and other components are the same as those of the embodiment shown in FIGS. 4 and 5. Is similar to

In FIG. 9, a degaussing coil 201 is formed in a loop shape, and is wound around the color cathode-ray tube 1 in a figure-eight shape to form a first winding coil 30.
1 and the first winding coil 301 as a winding core,
And a second winding coil 302 wound so as to be orthogonal to the winding coil 301. Further, in the embodiment of the present invention, the position where the second winding coil 302 is wound around the first winding coil 301 is within a predetermined range.

The degaussing coil 201 is connected to the upper loop 202
And the lower loop portion 203 are formed in a figure-eight shape.
One end of the first coil 301 is connected to one terminal of the connector 210, and the other end is connected to the other terminal of the connector 210 via the second coil 302.

The left side 211, the upper side 212, and the right side 213 of the upper loop portion 202 formed by the first winding coil 301.
And the combination of the lower side 214 and the upper side 224 of the lower loop portion 203 are determined by the current i6.
Generate a magnetic field in the same direction with respect to the inside.

The left side 221, the lower side 222, and the right side 223 of the lower loop portion 203 formed by the first winding coil 301.
And the combination of the upper side 224 and the lower side 214 of the upper loop part 203 are determined by the current i6.
Generate a magnetic field in the same direction with respect to the inside.

The second winding coil 302 in the upper loop portion 202 generates a magnetic field Y5 in the tube direction with respect to the panel surface 14 and the funnel portion 16 by the current i6.

The second winding coil 302 in the lower loop portion 203 generates a magnetic field Z5 in the direction of the tube surface with respect to the panel surface 14 and the funnel portion 12 by the current i6.

In the embodiment of the present invention, the upper loop 2
02, the position where the second winding coil 302 is wound around the first winding coil 301 is defined by the left side 211, the upper side 212,
The second winding coil 302 of the left side 211, the upper side 212, and the right side 213 is defined as the center of the right side 213 and the lower side 214.
Length L61, L6 at a position not wound around the winding coil 301
2. By adjusting L66, the magnetic field of the magnetic field Y5 is adjusted. In the lower loop portion 203, the second
Of the winding coil 302 on the first winding coil 301 are defined by the left side 221, the lower side 222, the right side 223, and the upper side 2
24, the left side 221, the lower side 222, the right side 22
3 to the first winding coil 301
By adjusting the lengths L71, L72,..., L76 of the positions where the magnetic field Z5 is not wound, the magnetic field Z5 is adjusted.

According to such an embodiment of the invention, the same effect as that of the embodiment of the invention shown in FIGS. 4 and 5 can be obtained, and the lengths L61, L62.
By adjusting L66, it is possible to easily adjust the magnetic field Y5 in the tube direction with respect to the panel surface 14, the shadow mask 16 and the funnel portion 12, and adjust the lengths L71, L72,. Thereby, there is also an effect that the magnetic field of the magnetic field Y5 in the tube surface direction with respect to the funnel portion 12 can be easily adjusted.

Although the embodiments of the present invention shown in FIGS. 1 to 9 have been applied to a color CRT using a shadow mask, they may be applied to a color CRT without a shadow mask. Further, in the embodiment of the invention shown in FIGS. 4, 5, 8 and 9, the first winding coil and the second winding coil are formed continuously by the same wire.
The first winding coil and the second winding coil may be formed of individual wires and then connected.

[0090]

According to the present invention, the first winding coil generates a vertical alternating magnetic field to demagnetize the vertical magnetization component on the surface of the color cathode-ray tube, and the second winding coil forms Since an AC magnetic field in the direction of the tube surface is generated to demagnetize the magnetized component in the direction of the tube surface, demagnetization of the magnetized component in the vertical direction on the surface of the color cathode-ray tube is performed. Can also be demagnetized, and it is possible to prevent the color purity of the color television receiver or the color monitor from being lowered.

[Brief description of the drawings]

FIG. 1 is a front view of a degaussing coil showing a first embodiment of a degaussing device according to the present invention.

FIG. 2 is a side view of a color CRT showing the degaussing apparatus according to the first embodiment of the present invention.

FIG. 3 is a circuit diagram showing a circuit system for flowing a degaussing current to the degaussing coil of FIG. 1;

FIG. 4 is a side view of a color CRT showing the embodiment of the second invention.

FIG. 5 is a front view showing a degaussing coil.

FIG. 6 is a front view of a degaussing coil showing a degaussing device according to a third embodiment of the present invention.

FIG. 7 is a front view of a degaussing coil showing a degaussing device according to a fourth embodiment of the present invention.

FIG. 8 is a front view of a degaussing coil showing a fifth embodiment of the degaussing device according to the present invention.

FIG. 9 is a front view of a degaussing coil showing a degaussing device according to a sixth embodiment of the present invention;

FIG. 10 is a side view showing a color CRT provided with a conventional degaussing device.

FIG. 11 is a front view showing the degaussing coil of FIG. 10;

FIG. 12 is a circuit diagram showing a circuit system for supplying a degaussing current to such a degaussing coil.

FIG. 13 is a waveform diagram showing a current flowing through a degaussing coil by the degaussing circuit of FIG.

FIG. 14 is a side view showing a conventional color CRT provided with a degaussing device capable of degaussing a funnel portion.

FIG. 15 is a front view showing the degaussing coil of FIG. 14;

[Explanation of symbols]

 Reference Signs List 1 color cathode ray tube 17 degaussing coil 21 first winding coil 22 second winding coil 43 degaussing circuit

Claims (4)

[Claims] 1. A degaussing device for degaussing a color cathode ray tube, comprising: a first winding coil formed in a loop shape and attached to a predetermined position of the color cathode ray tube; A second winding coil wound orthogonally to the first winding coil; and a degaussing current supply means for flowing a degaussing current to the first and second winding coils. Characteristic degaussing device. 2. The degaussing device according to claim 1, wherein the first winding coil and the second winding coil are continuously formed of the same wire. 3. The degaussing device according to claim 1, wherein the first winding coil and the second winding coil are formed of individual wires and then connected. 4. The degaussing device according to claim 1, wherein a position at which the second winding coil is wound around the first winding coil is within a predetermined range.