JPH0660827A - Deflection yoke - Google Patents

Abstract

PURPOSE:To reduce an overcurrent and restrain the heat generation due to an overcurrent by radiating an electric field of a polarity reverse to an electric field of a high frequency to be radiated from a deflection yoke to the exterior, and canceling the electric field of a high frequency so as to reduce it. CONSTITUTION:A reverse pulse generating coil 4 is disposed above a fringe of an opening of a horizontal deflection coil 2, formed on a side of a phosphor screen 11. An electric field radiator 5 is connected to a reverse pulse generating terminal 4P of the coil 4, and fixed onto a side of the phosphor screen 11 in the fringe of the coil 2. At this time, a horizontal deflection magnetic field, which is varied rapidly during a horizontal retrace line period, is generated in the fringe. Accordingly, a pulse voltage e2 of a polarity reverse to a pulse voltage e1 applied to the coil 2 is generated in the coil 4. The voltage e2 becomes a voltage proportional to the number of winding of the coil 4. Application of the voltage e1 to the coil 2 allows an electric field of a high frequency to be radiated from the deflection yoke 1 to the exterior. Meanwhile, the voltage e2 is applied to the electric field radiator 5 so that an electric field approximately proportional to the voltage e2 can be radiated to the exterior.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke mounted on a cathode ray tube device, and more particularly to a deflection yoke capable of reducing a high frequency electric field radiated from the deflection yoke.

[0002]

2. Description of the Related Art A high voltage pulse voltage is applied to a horizontal deflection coil of a deflection yoke in order to flow a sawtooth wave current having a horizontal deflection period, and a high frequency electric field is radiated from the deflection yoke to the outside by this pulse voltage. It As a conventional technique for reducing the high-frequency electric field, a pulse voltage having a polarity opposite to that of the pulse voltage is generated, the generated electric field is emitted to the outside, and the high-frequency electric field emitted from the deflection yoke to the outside is generated. There is a method of offsetting and reducing. As an example of this prior art, S.I.D. 92 Digest (1992), pages 135 to 140 (SID
92 DIGEST 1992 PP.135-140), a high voltage pulse voltage applied to the horizontal deflection coil reduces the electric field of high frequency components radiated to the outside of the cathode ray tube device. A radiator is provided, and a coil for generating a pulse voltage having a reverse polarity with respect to the pulse voltage applied to the horizontal deflection coil is provided in the flyback transformer, and the reverse pulse voltage generated thereby is generated by the electric field radiator. In addition, the electric field of the high frequency component is canceled and reduced.

[0003]

In the above-mentioned prior art, a reverse polarity pulse voltage is applied in the flyback transformer instead of the method of reducing the electric field by the deflection yoke itself which is the main source for radiating the electric field of the high frequency component. Since a coil for generating is provided, when attaching a field radiator to the deflection yoke,
A lead wire was required between the flyback transformer and the deflection yoke to apply a pulse voltage of opposite polarity to the field emitter. Also, in order to reduce the electric field generated in the front direction of the cathode ray tube, it is necessary to attach an electric field radiator so as to cover the inner surface of the horizontal deflection coil. However, a plate-shaped conductive material is attached to this electric field radiator. When used, the horizontal deflection magnetic field generated an eddy current in the electric field radiator, which caused heat generation. Therefore, it is necessary to remove the electric field radiator from the deflection yoke and provide it around the cathode ray tube device to solve the problem of heat generation.

[0004]

In order to achieve the above object, in a deflection yoke according to the present invention, a reverse pulse generating coil for generating a pulse voltage having a reverse polarity is provided at a position where a horizontal deflection magnetic field crosses, The deflection yoke is provided with an electric field radiator composed of a conductive wire or a thin-film conductive wire.

[0005]

The reverse pulse generating coil has a function of generating a pulse voltage of reverse polarity by interlinking the horizontal deflection magnetic fields. By applying the reverse pulse voltage to the electric field radiator, the electric field radiator has a function of radiating a high frequency electric field generated by the reverse pulse voltage to the outside. This acts to cancel the high frequency electric field emitted from the horizontal deflection coil. In addition, since the electric field radiator is formed of a conductive wire, there is an effect that an eddy current is less likely to occur. Further, if the reverse pulse generating coil or the field radiator is made of a thin film conductor, the thickness of both can be reduced, and thus it can be provided in the gap between the cathode ray tube and the horizontal deflection coil.

[0006]

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

FIG. 1 is a side view of the deflection yoke 1 of the first embodiment of the present invention mounted on a cathode ray tube 6, and FIG. 2 is a reverse pulse generating coil 4 of the first embodiment and an electric field. It is the figure which showed the connection of the radiator 5. Further, FIG. 3 shows the pulse voltage e1 applied to the horizontal deflection coil 2 of the first embodiment,
Reverse pulse voltage e2 generated by the reverse pulse generating coil 4
It is the figure which showed. In the above figures, 1 is a deflection yoke, 2 is a horizontal deflection coil, 3 is a vertical deflection coil, 4 is a reverse pulse generation coil, 5 is an electric field radiator, 6 is a cathode ray tube, and 2 is a cathode ray tube.
P is a low potential side terminal of the horizontal deflection coil, 3P is a low potential side terminal of the vertical deflection coil, 4P is a reverse pulse generation terminal of the reverse pulse generation coil 4, 11 is a fluorescent screen, and e1 is applied to the horizontal deflection coil 2. A pulse voltage, e2, is a reverse pulse voltage generated by the reverse pulse generating coil 4.

The deflection yoke 1 of the present embodiment is a field emitter formed of a conductor or a thin film conductor in order to reduce the electric field of the high frequency component generated around the deflection yoke by the pulse voltage e1 applied to the horizontal deflection coil 2. 5 and further has a pulse voltage e2 having a polarity opposite to that of the pulse voltage e1.
The reverse pulse generating coil 4 for generating the pulse is provided at a position intersecting with the horizontal deflection magnetic field, and one end of the reverse pulse generating coil 4 is connected to the low potential side terminal 2P of the horizontal deflection coil 2 or the low potential side terminal of the vertical deflection coil 3. It is characterized in that it is connected to either one of 3P and the other end is connected to the electric field radiator 5. At the low-potential-side terminal 2P of the horizontal deflection coil 2, a parabola-shaped voltage having a polarity opposite to that of the horizontal deflection cycle, which is effective in reducing the electric field, is generated. The parabola wave-like voltage is generated by a sawtooth wave-like horizontal deflection current flowing through a capacitor connected to the low potential side of the horizontal deflection coil 2. Further, at the low-potential-side terminal 3P of the vertical deflection coil 3, a voltage close to a DC potential, which is almost the same as the ground potential as an effect of reducing the electric field and which changes slightly in the vertical deflection cycle, is generated.

The reverse pulse generating coil 4 is mounted on the fringe of the opening of the horizontal deflection coil 2 on the side of the fluorescent screen 11 as shown in FIG. The field radiator 5 is connected to the reverse pulse generating terminal 4P of the reverse pulse generating coil 4 as shown in the wiring diagram of FIG. 2, and is attached to the fringe of the horizontal deflection coil 2 on the side of the fluorescent screen 11. At this time, a horizontal deflection magnetic field that rapidly changes during the horizontal retrace period is generated from the fringes, whereby the reverse pulse generating coil 4 is
As shown in FIG. 3, a pulse voltage e2 having a polarity opposite to that of the pulse voltage e1 applied to the horizontal deflection coil 2 is generated.
As the reverse pulse voltage e2, a voltage proportional to the number of turns of the reverse pulse generating coil 4 can be obtained. Here, the amplitude value of the pulse voltage e1 is as high as about 1000 V, and when the pulse voltage e1 is applied to the horizontal deflection coil 2,
A high frequency electric field is radiated from the deflection yoke 1 to the outside. On the other hand, the reverse pulse voltage e2 is applied to the electric field radiator 5 and radiates an electric field substantially proportional to the reverse pulse voltage e2 to the outside.
As a result, the deflection yoke cancels out the high-frequency electric field radiated to the outside, and the electric field can be significantly reduced. Further, since the electric field radiator 5 is composed of a conductive wire or a thin-film conductive wire, the electric field radiator 5 is less likely to generate an eddy current than a plate-shaped conductive material, and there is an advantage that heat generation accompanying this can be reduced. Further, the total area of the electric field radiator 5 can be easily changed only by changing the length of the conducting wire, and the strength of the canceling electric field can be easily adjusted. Further, the present embodiment has an advantage that the high frequency electric field can be reduced by the structure in which the reverse pulse generating coil 4 and the electric field radiator 5 are simply attached to the deflection yoke 1.

FIG. 4 is a view of the deflection yoke of the second embodiment of the present invention as seen from the opening of the horizontal deflection coil 2 on the fluorescent screen 11 side. FIG. 5 shows the reverse pulse generation coil 4 and field emission at this time. It is a figure which shows the connection of the container 5. The present embodiment is characterized in that a plurality of the reverse pulse generating coils 4 are provided and these are connected in series and connected to the electric field radiator 5. FIG. 4 shows a case in which two reverse pulse generating coils 4 are provided, and the reverse pulse generating coils 4a and 4b are provided in the upper and lower windows of the horizontal deflection coil 2 where winding is not performed. These are shown in FIG.
a and 4b are connected in series, and one end of the reverse pulse generating coil 4a is connected to either the low potential side terminal 2P of the horizontal deflection coil 2 or the low potential side terminal 3P of the vertical deflection coil 3.
One end of the reverse pulse generating coil 4b is connected to the electric field radiator 5 formed of a conductor or a thin film conductor.

In this embodiment, the reverse pulse generating coil 4a,
4b is attached to the upper and lower windows of the horizontal deflection coil 2 to interlink with the horizontal deflection magnetic field, and the reverse pulse voltage e2 is generated in both the reverse pulse generation coils 4a and 4b. This allows
The reverse pulse voltage applied to the electric field radiator 5 is the sum of the reverse pulse voltages generated by the reverse pulse generating coils 4a and 4b, and the effect of reducing the electric field can be increased.

FIG. 6 is a side view of the deflection yoke 1 of the third embodiment of the present invention and a view seen from the opening of the horizontal deflection coil 2 on the fluorescent screen 11 side. FIG. 7 shows the connection of FIG. FIG. The present embodiment is characterized in that a plurality of the reverse pulse generating coils 4 are provided and the electric field radiator 5 is connected to each of them. The reverse pulse generating coils 4a and 4b are arranged above and below the fringe of the horizontal deflection coil 2 as shown in FIG. Figure 7 shows these two coils.
, One end of the reverse pulse generating coils 4a, 4b is connected to either the low potential side terminal 2P of the horizontal deflection coil 2 or the low potential side terminal 3P of the vertical deflection coil 3 and the other end is connected to the electric field. The radiators 5a and 5b are respectively connected.

In this embodiment, the reverse pulse generating coils 4a,
4b is mounted on the fringe of the horizontal deflection coil 2 and linked with the horizontal deflection magnetic field to generate the reverse pulse voltage e2 in both the reverse pulse generating coils 4a and 4b. By applying this to the electric field radiators 5a and 5b, it is possible to cancel and reduce the electric field generated from the deflection yoke 1.
Further, in the present invention, since the plurality of electric field radiators 5 are provided, the electric field radiators 5 are attached in accordance with the plurality of places where the electric field of the deflection yoke 1 is strongly generated, whereby the effect of reducing the electric field is increased. You can

FIG. 8 is a view of the deflection yoke 1 of the fourth embodiment of the present invention as seen from the opening of the horizontal deflection coil 2 on the side of the fluorescent screen 11. The present embodiment is characterized in that the reverse pulse generating coil 4 and the electric field radiator 5 are continuously formed by the same conductive wire. The reverse pulse generating coil 4 is attached to the window portion of the horizontal deflection coil 2 as shown in FIG. 8, and the electric field radiator 5 is formed by corrugating the conductor.
Further, FIG. 9 is a diagram showing the inverse pulse generating coil 4 and the electric field radiator 5 according to the fourth embodiment. In this figure, as shown in FIG. 6, a rectangular reverse pulse generating coil 4 is mounted on the fringe of the horizontal deflection coil 2, and a square wave electric field radiator 5 is mounted on the reverse pulse generating coil 4. The configuration is shown. Here, the reverse pulse generating coil 4 and the electric field radiator 5 are continuously formed by the same conductive wire.

In the present embodiment, since the reverse pulse generating coil 4 and the field radiator 5 are continuously formed by the same conductive wire, the cost spent for connecting them can be reduced. Moreover, since there is no connection point, reliability can be improved. Further, since the reverse pulse generating coil 4 and the electric field radiator 5 are integrally formed, for example, in FIG. 8, both of them can be easily fitted in the opening portion on the fluorescent screen 11 side of the horizontal deflection coil by an inset type. Similarly, there is an advantage that the reverse pulse generating coil 4 and the electric field radiator 5 of FIG. 9 can be mounted on the fringe of the horizontal deflection coil 2 as one component.

FIG. 10 is a view of the deflection yoke 1 of the fifth embodiment of the present invention seen from the opening of the horizontal deflection coil 2 on the fluorescent screen 11 side, and FIGS. 11 and 12 show the fifth embodiment. It is a figure which shows the connection of the reverse pulse generation coil 4 concerned. In this embodiment, the reverse pulse generating coil 4 is integrally wound at the same time as the horizontal deflection coil 2 so that the reverse pulse is generated in the winding direction.
One end of the reverse pulse generating coil 4 is connected to the low potential side terminal 2P of the horizontal deflection coil 2 or the low potential side terminal 3 of the vertical deflection coil 3.
It is characterized in that it is connected to either one of P. As shown in FIG. 10, the reverse pulse generating coil 4 starts to be wound from the window portion on the low potential side of the horizontal deflection coil 2 and is integrally wound simultaneously with the horizontal deflection coil 2 to the position shown by the dotted line in the figure, and at the end of winding. The corresponding reverse pulse generating side terminal 4P is provided outside the horizontal deflection coil 2. The connection between the reverse pulse generating coil 4 and the horizontal deflection coil 2 at this time is as shown in FIG. 11, and the reverse pulse generating coil 4 is connected to the low potential side terminal 2P of the horizontal deflection coil 2 or as shown in FIG. , The reverse pulse generating coil 4 is connected to the low potential side terminal 3 of the vertical deflection coil 3.
It is connected to P. The portion surrounded by the dotted line in FIGS. 11 and 12 shows the portion integrally wound at the same time as the horizontal deflection coil 2.

In the present embodiment, the reverse pulse generating coil 4 is integrally wound on the low potential side of the horizontal deflection coil 2 at the same time, so that the reverse pulse generating coil 4 can be incorporated in the work process of producing the horizontal deflection coil 2. . Further, the conductor wire required for connecting the reverse pulse generating coil 4 to the low potential side terminal 2P of the horizontal deflection coil 2 can be omitted by integrally winding. Further, since the portion connecting the reverse pulse generating coil 4 is on the low potential side of the horizontal deflection coil 2, the potential difference between the horizontal deflection coil 2 and the reverse pulse generating coil 4 is small, and a short circuit due to the potential difference between the two is generated. The problem of accidents does not occur.

FIG. 13 and FIG. 15 are views showing the field radiator 5 of the deflection yoke 1 of the sixth embodiment of the present invention, and FIG.
FIG. 11 is a diagram showing a voltage waveform of a low potential side terminal 2P of the horizontal deflection coil 2 according to the sixth embodiment. In the present embodiment, only the electric field radiator 5 is provided in the deflection yoke 1 without using the reverse pulse generation coil 4, and this is provided at either the low potential side terminal 2P of the horizontal deflection coil 2 or the low potential side terminal 3P of the vertical deflection coil. The feature is that it is connected to either one. In FIG. 13, the electric field radiator 5 is connected to the low potential side terminal 2P of the horizontal deflection coil 2. The low potential side terminal 2P of the horizontal deflection coil 2 at this time
, A parabolic wave-shaped voltage having a polarity opposite to that of the pulse voltage e1 is generated, as indicated by e3 in FIG. The parabolic wave voltage e3 is generated when a sawtooth wave horizontal deflection current flows through a capacitor connected to the low potential side of the horizontal deflection coil 2, and is radiated to the outside from the deflection yoke by the pulse voltage e1. This has the effect of canceling the generated high-frequency electric field. In FIG. 15, the electric field radiator 5 is connected to the low potential side terminal 3P of the vertical deflection coil 3. The voltage of the low-potential side terminal 3P of the vertical deflection coil 3 changes slightly in the vertical deflection cycle, but it can be considered that it is almost a DC potential. Therefore, connecting the electric field radiator 5 to the low potential side terminal 3P of the vertical deflection coil 3 has the same effect of reducing the electric field as grounding the electric field radiator 5. Further, a horizontal size coil or the like is connected to the low potential side of the horizontal deflection coil 2 and a pulse voltage having the same polarity as the pulse voltage e1 is generated at the low potential side terminal 2P of the horizontal deflection coil 2 to reduce the electric field. When the effect is small, the electric field radiator 5 is connected to the low potential side terminal 3 of the vertical deflection coil 3.
The effect of reducing the electric field can be enhanced by connecting to P.

16 and 17 are side views of the deflection yoke 1 according to the seventh embodiment of the present invention. In the above figures,
Reference numeral 7 is a canceling coil for canceling the unwanted radiation magnetic field generated from the deflection yoke 1. In the deflection yoke of the present embodiment, the reverse pulse generating coil 4 is attached at a position where the canceling magnetic field generated by the canceling coil 7 has a function of canceling the unwanted radiation magnetic field generated by the horizontal deflecting coil 2, and further the electric field radiator 5 is attached. Is characterized in that it is attached so as to cover the cancel coil. In FIG. 16, a reverse-core generating coil 7 is attached between the horizontal deflection coil 2 and the cancel coil 7 in a deflection yoke 1 in which an air-core type cancel coil 7 that does not use a ferrite core is provided above and below the horizontal deflection coil 2. The field radiator 5 is attached to the upper portion of the cancel coil 7. Further, in FIG. 17, the cancel coil 7 using a ferrite core is provided above and below the deflection yoke 1, and the reverse pulse generation coil 4 is attached so as to surround the fringe portion of the cancel coil 7 and the horizontal deflection coil 2, and The field radiator 5 is attached to the upper part of the cancel coil 7.

In this embodiment, the reverse pulse generating coil 4 is
By mounting the canceling coil 7 in the vicinity of the canceling coil 7, both the canceling magnetic field of the horizontal deflection cycle generated by the canceling coil 7 and the deflecting magnetic field generated by the horizontal deflecting coil 2 are simultaneously linked with the reverse pulse generating coil 4, and thus a large amplitude is generated. Pulse voltage can be obtained. Further, by mounting the electric field radiator 5 near the cancel coil 7, the electric field radiated from the cancel coil 7 can be concentrated and reduced. Further, the reverse pulse generating coil 4
If the field radiator 5 is attached to the cancel coil 7,
There is no need to newly provide a place for attaching both. When the bobbin structure of the cancel coil 7 is configured so that the reverse pulse generating coil 4 and the field radiator 5 can be wound, the cancel coil 7 can be integrally attached to the deflection yoke 1 and the productivity can be improved.

18, FIG. 19, FIG. 20, FIG. 21 and FIG.
FIG. 2 is a view showing the shape or the mounting position of the electric field radiator 5 of the deflection yoke 1 according to the eighth embodiment of the present invention. In the deflection yoke 1 of this embodiment, a field radiator 5 is attached so as to cover the fringe portion of the horizontal deflection coil 2 or a part of the inner surface of the deflection yoke 1, and the field radiator 5 is further formed into a ring shape. Of the horizontal deflection coil and attached to the front surface of the fringe portion of the horizontal deflection coil according to the shape of the fringe, and further, the electric field radiator 5 or the reverse pulse generating coil 4 is provided with a conductor pattern on the film-shaped insulator. The feature is that the coil is formed by printing or etching. In FIG. 18, the electric field radiator 5a is connected to the fluorescent screen 1 of the horizontal deflection coil 2.
The configuration is such that it is attached to the outer periphery of the fringe of the opening on the first side, and further the electric field radiator 5b is attached to the outer periphery of the fringe of the opening of the horizontal deflection coil 2 on the electron gun side. In FIG. 19, the electric field radiator 5 has a spiral shape and is attached so as to cover a part of the inner surface of the deflection yoke 1. In FIG. 20, the field radiator 5 is a ring-shaped coil and is attached to the front of the fringe of the horizontal deflection coil 2. Also in FIG.
22 is composed of a field radiator 5 and, in FIG. 22, a reverse pulse generating coil 4 which is a coil formed by printing or etching a conductor pattern on a film-shaped insulator 8.

In this embodiment, the pulse voltage e1 is applied to the horizontal deflection coil 2 to cancel the high frequency electric field radiated from the horizontal deflection coil 2 to the outside, so that the horizontal deflection coil 2 is covered with the electric field radiator 5. It was installed like this. In particular, when the horizontal deflection coil 2 is attached to the fluorescent screen 11 side opening and the electron gun side opening on the outer periphery of the fringe as shown in FIG. 18, the electric field reducing effect on the left and right side surfaces of the deflection yoke 1 is large. Further, when reducing the electric field in front of the deflection yoke 1, if the inner surface of the horizontal deflection coil 2 is attached so as to be covered with the electric field radiator 5, the reduction effect is great. If the electric field radiator 5 is attached as shown in FIG. good. At this time, since the electric field radiator is composed of the conductive wire, eddy current due to the horizontal deflection magnetic field is hard to be generated, and since the electric field radiator 5 is the conductive wire, the electric field radiator 5 can be formed thinly. It is possible. Also, as shown in FIG. 20, when the electric field radiator 5 is composed of a ring-shaped coil having a shape of a fringe, the electric field in front of the deflection yoke 1 can be similarly reduced. Further, there is an advantage that it can be easily attached to the fringe portion. Finally, in order to allow the electric field radiator 5 or the reverse pulse generating coil 4 to be attached to the inner surface of the deflection yoke 1 by closely adhering thereto, as shown in FIG. 21 and FIG. In addition, if the conductor pattern is composed of a coil formed by printing or etching, the thickness of the field radiator 5 and the reverse pulse generating coil 4 can be reduced. Further, there is an advantage that eddy current is unlikely to be generated as in the case of the conductor wire.

FIG. 23 is a diagram showing the pulse voltage e1 and the reverse pulse voltage e2 applied to the horizontal deflection coil 2 of the ninth embodiment of the present invention, and FIG. 24 is the connection of the ninth embodiment. FIG. Here, 9 is a capacitor and 10 is a resistor. The present embodiment is characterized in that the high-frequency component contained in the reverse pulse voltage e2 generated in the reverse pulse generating coil 4 is prevented from ringing by connecting a damping element in parallel to both ends of the reverse pulse generating coil 4.

In the present embodiment, in order to reduce the ringing of the high frequency component generated immediately after the fall of the reverse pulse voltage e2 as shown in FIG. 23, a capacitor 9 is provided at both ends of the reverse pulse generating coil 4 shown in FIG. The resistors 10 are connected in series and are connected in parallel. The ringing of the high-frequency component tries to obtain a large amplitude reverse pulse voltage e2,
This occurs when the number of turns of the reverse pulse generating coil 4 is increased. Since the ringing of the high frequency component occurs, the effect of reducing the electric field is reduced as compared with the case where there is no ringing. Therefore, as a means to improve this, the capacitor 9
The resistor 10 and the resistor 10 are connected in parallel to the reverse pulse generating coil 4 to reduce the ringing of the high frequency component and improve the effect of reducing the electric field.

[0025]

According to the present invention, since it is configured as described above, the following effects can be obtained.

That is, by applying a reverse pulse voltage to the electric field radiator provided in the deflection yoke, an electric field having a polarity opposite to that of the high frequency electric field emitted from the deflection yoke to the outside is radiated to cancel the high frequency electric field. There is an effect that can be reduced. Further, since the electric field radiator is composed of the conductive wire, it is possible to reduce the eddy current generated by the horizontal deflection magnetic field, which has an effect of suppressing heat generation due to the eddy current. Further, it is possible to continuously form the reverse pulse generating coil and the field radiator, which has an effect of improving productivity.

[Brief description of drawings]

FIG. 1 is a side view showing a deflection yoke according to a first embodiment of the present invention.

FIG. 2 is a connection diagram of the inverse pulse generating coil and the field radiator according to the first embodiment.

FIG. 3 shows waveforms of a pulse voltage applied to the horizontal deflection coil and a reverse pulse voltage generated by the reverse pulse generating coil according to the first embodiment.

FIG. 4 is a front view showing a deflection yoke according to a second embodiment of the present invention.

FIG. 5 is a connection diagram of an inverse pulse generating coil and a field radiator according to a second embodiment.

FIG. 6 is a side view and a front view showing a deflection yoke according to a third embodiment of the present invention.

FIG. 7 is a connection diagram of FIG. 6, which is a third embodiment.

FIG. 8 is a front view showing a deflection yoke according to a fourth embodiment of the present invention.

FIG. 9 is a diagram showing an inverse pulse generating coil and a field radiator according to a fourth embodiment.

FIG. 10 is a front view showing a deflection yoke according to a fifth embodiment of the present invention.

FIG. 11 is a connection diagram of a reverse pulse generating coil according to a fifth embodiment.

FIG. 12 is another connection diagram of the reverse pulse generating coil of the fifth embodiment.

FIG. 13 is a diagram showing an electric field radiator according to a sixth embodiment of the present invention.

FIG. 14 is a voltage waveform diagram according to the sixth embodiment.

FIG. 15 is a view showing an electric field radiator according to a sixth embodiment.

FIG. 16 is a side view showing a deflection yoke according to a seventh embodiment of the present invention.

FIG. 17 is a side view showing a deflection yoke of a seventh embodiment.

FIG. 18 is a side view showing a deflection yoke according to an eighth embodiment of the present invention.

FIG. 19 is a front view showing a deflection yoke of the eighth embodiment.

FIG. 20 is a front view showing a deflection yoke of the eighth embodiment.

FIG. 21 is a diagram showing an electric field radiator according to an eighth embodiment.

FIG. 22 is a diagram showing an inverse pulse generating coil according to an eighth embodiment.

FIG. 23 is a voltage waveform diagram according to the ninth embodiment of the present invention.

FIG. 24 is a connection diagram according to the ninth embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Deflection yoke, 2 ... Horizontal deflection coil, 2P ... Low potential side terminal of horizontal deflection coil, 3 ... Vertical deflection coil, 3P ... Low potential side terminal of vertical deflection coil, 4 ... Reverse pulse generation coil, 4P ... Reverse pulse Reverse pulse source side terminal of generator coil,
5 ... Electric field radiator, 6 ... Cathode ray tube, 7 ... Cancellation coil, 8 ... Insulator, 9 ... Capacitor, 10 ... Resistor, 11 ...
Phosphor screen

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Soichi Sakurai, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd.Inside of Hitachi Media Visual Media Research Center (72) Inventor Noritaka Okuyama 292, Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Stock company Hitachi Media Media Research Laboratories (72) Inventor Kazuo Majima 3300 Hayano, Mobara, Chiba, Hitachi Hitachi Ltd. Mobara Factory (72) Inventor Yoshio Yoshihara 3300, Hayano, Mobara, Chiba Hitachi, Ltd. Tokorobara Plant (72) Inventor Minoru Furuya No. 1 Kitano, Majo, Mizusawa City, Iwate Prefecture

Claims (11)

[Claims] 1. In a deflection yoke of a cathode ray tube device, a reverse pulse generating coil is placed at a position where a horizontal deflection magnetic field interlinks so as to generate a pulse voltage having a polarity opposite to that of a pulse voltage applied to the horizontal deflection coil. The reverse pulse generating coil is connected to one of the low-potential side terminals of the horizontal deflection coil or the vertical deflection coil, and the other end of the reverse pulse generation coil is provided. A deflection yoke connected to a field radiator. 2. The deflection yoke according to claim 1, wherein a plurality of the reverse pulse generating coils are provided and are connected in series to the field radiator, or the reverse pulse generating coils are individually provided. A deflection yoke to which the electric field radiator is connected. 3. The deflection yoke according to claim 1, wherein the electric field radiator and the reverse pulse generating coil are continuously formed of the same conductive wire. 4. The deflection yoke according to claim 1, wherein the reverse pulse generating coil is integrally wound at the same time as the horizontal deflection coil in a winding direction that generates a pulse having a reverse polarity with respect to the pulse voltage of the horizontal deflection coil. A deflection yoke, wherein one end of the reverse pulse generation coil is connected to one of the low potential side terminals of the horizontal deflection coil or the vertical deflection coil, and the other end is connected to the field radiator. 5. The deflection yoke according to claim 1, wherein the reverse pulse generating coil is attached at a position where a canceling magnetic field generated by a canceling coil for canceling an unwanted radiation magnetic field generated by the horizontal deflecting coil intersects. Further, the deflection yoke is characterized in that the field radiator is attached so as to cover the cancel coil. 6. The deflection yoke according to claim 1 or 5, wherein only the electric field radiator is provided and is connected to either the low potential side terminal of the horizontal deflection coil or the vertical deflection coil. Characteristic deflection yoke. 7. The deflection yoke according to claim 1, wherein the electric field radiator is attached so as to cover a fringe portion of the horizontal deflection coil or a part of an inner surface of the horizontal deflection coil. Characteristic deflection yoke. 8. The deflection yoke according to claim 1 or 6, wherein the electric field radiator comprises a ring-shaped single wire, and is attached to the front surface of the fringe portion of the horizontal deflection coil in accordance with the fringe shape. A deflection yoke characterized by the above. 9. The deflection yoke according to claim 1, wherein the electric field radiator or the reverse pulse generating coil is a coil formed by printing or etching a conductor pattern on a film-shaped insulator. Deflection yoke. 10. The deflection yoke according to claim 1, wherein:
A deflection yoke, wherein ringing of a high frequency component included in a reverse pulse voltage generated in the reverse pulse generating coil is prevented by connecting a damping element in parallel to both ends of the reverse pulse generating coil. 11. In a deflection yoke of a cathode ray tube device, a reverse pulse generating coil is placed at a position where a horizontal deflection magnetic field intersects so as to generate a pulse voltage having a polarity opposite to that of a pulse voltage applied to the horizontal deflection coil. The reverse pulse generating coil is connected to one of the low-potential side terminals of the horizontal deflection coil or the vertical deflection coil, and the other end of the reverse pulse generation coil is provided. A cathode ray tube device having a deflection yoke connected to a field radiator.