JPH05266826A - Deflection yoke device - Google Patents

Abstract

PURPOSE:To reduce the unnecessary radiation increased by an auxiliary coil with a magnetic shield plate fitted below the bridge portion of the opening section of a saddle type horizontal deflecting coil and the auxiliary coil or above the bridge portion of the opening section of the saddle type horizontal deflecting coil and the auxiliary coil. CONSTITUTION:A magnetic shield plate 5 is fitted below the bridge portion (refer to the portion shown by an arrow A in the Figure) of the opening section of a saddle type horizontal deflecting coil 2 and an auxiliary coil 4 or above the bridge portion of the opening section of the saddle type horizontal deflecting coil 2 and the auxiliary coil 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a deflection yoke device mounted on a cathode ray tube of a television receiver, a CRT display device or the like.

[0002]

2. Description of the Related Art Conventionally, of the external leakage magnetic fields of a deflection yoke device, it is necessary to prevent external leakage magnetic fields of a horizontal deflection magnetic field having a high frequency from becoming unnecessary radiation and adversely affecting other devices such as terminals. As the deflection yoke device configured, for example, Japanese Patent Laid-Open No. 63-26928 (H01J29 / 76)
Are disclosed in. This is constructed as shown in FIGS. 6 and 7, and in each drawing, 1 is a deflection yoke device main body, 2 is a horizontal deflection coil, 3 is a vertical deflection coil, and 4 is a horizontal deflection magnetic field generated by the horizontal deflection coil 2. It is an auxiliary coil that cancels the magnetic field leaking to the outside of the core. The auxiliary coil 4 is mounted on the vertical axis of the deflection yoke device 1 or in the vicinity of the vertical axis.

FIG. 8 shows the deflection yoke device A shown in FIG.
6A shows a cross section taken along the line AA, and 6a denotes an electron beam deflection magnetic field of a magnetic field generated by the horizontal deflection coil, 6b denotes a magnetic field in the core of the magnetic field generated by the horizontal deflection coil, and 6c leaks as unnecessary radiation of the magnetic field generated by the horizontal deflection coil. A magnetic field, 7a indicates a magnetic field generated by the side surface of the auxiliary coil 4.

FIG. 9 shows a cross section taken along the line BB 'of the deflection yoke device shown in FIG. 7. In FIG. 9, 6d and 6e are magnetic fields leaking as unnecessary radiation of the magnetic field by the horizontal deflection coil, and 7b is an auxiliary coil. The magnetic field by the lower part of 4 and the magnetic field 7c by the upper part of the auxiliary coil 4 are shown.

As shown in the respective drawings, in the deflection yoke device disclosed in this publication, in order to reduce unnecessary radiation on the left and right of the deflection yoke device, auxiliary coils are attached above and below the deflection yoke device, and the auxiliary coil is attached. A current is passed through the coil in parallel or in series with the horizontal deflection coil of the deflection yoke device.

[0006]

However, according to this method, the current flowing through the horizontal deflection coil and the auxiliary coil for canceling the unwanted radiation is in the saddle type horizontal deflection coil. (Refer to the portion indicated), the magnetic field 6e leaking as unnecessary radiation and the magnetic field 7b generated by the lower part of the auxiliary coil 4 have the same direction (see FIG. 9). Is canceled by the magnetic field generated by the auxiliary coil, but there is a problem that unnecessary radiation is increased in the vertical direction of the deflection yoke device.

On the other hand, as shown in FIGS. 10 to 13, when a current is passed through the auxiliary coil in a direction of suppressing unnecessary radiation in the vertical direction of the deflection yoke device (as opposed to the deflection yoke device shown in FIGS. 6 to 9). Current flows in the direction), and this time the magnetic field 6c leaking as unnecessary radiation and the magnetic field 7 due to the upper part of the auxiliary coil 4
Since a is in the same direction (see FIG. 12), the unwanted radiation in the vertical direction of the deflection yoke device is canceled by the magnetic field generated by the auxiliary coil, but the unwanted radiation in the lateral direction of the deflection yoke device is strengthened. In this case, however, inconvenience occurs.

The configuration of the deflection yoke device shown in FIGS. 10 to 13 is similar to that of the deflection yoke device shown in FIGS. 6 to 9, and detailed description thereof will be omitted.

[0009]

In order to solve the above problems, according to the present invention, a pair of saddle type horizontal deflection coils and a toroidal or saddle type vertical deflection coil wound along the inner surface of the core, A pair of auxiliary coils are connected in series to the horizontal deflection coil, and the auxiliary coils are formed in a loop outside the core with their centers located on or near the vertical axis of the deflection yoke device, and The auxiliary coil is arranged so as to be wound so as to be orthogonal to the vertical axis, and a magnetic field opposite to the magnetic field leaking to the outside of the core is generated by the auxiliary coil among the horizontal deflection magnetic fields generated by the horizontal deflection coil. In the deflection yoke device, a magnetic shield plate is provided between the connecting portion of the opening of the saddle-type horizontal deflection coil and the connecting portion of the lower portion of the auxiliary coil or the opening of the saddle-type horizontal deflection coil. Is to St. provide deflection yoke apparatus characterized by portion and mounted on an upper portion of the auxiliary coil.

A pair of saddle type horizontal deflection coils and a toroidal or saddle type vertical deflection coil wound along the inner surface of the core and a pair of auxiliary coils are connected in series to the horizontal deflection coil. The auxiliary coil is formed in a loop outside the core with its center located on or near the vertical axis of the deflection yoke device, and is wound and arranged orthogonally to the vertical axis. A deflection yoke device configured to generate a magnetic field reverse to a magnetic field leaking to the outside of the core among the horizontal deflection magnetic fields generated by the horizontal deflection coil by the auxiliary coil,
A magnetic shield plate made of a ferrite resin and having a substantially U-shaped cross section is provided with a crossing portion of the opening of the saddle-shaped horizontal deflection coil and a lower portion of the auxiliary coil or a crossing portion of the opening of the saddle-shaped horizontal deflection coil and the auxiliary coil. A deflection yoke device mounted on the upper part of the deflection yoke device.

A pair of saddle type horizontal deflection coils and a toroidal or saddle type vertical deflection coil wound along the inner surface of the core and a pair of auxiliary coils are connected in series to the horizontal deflection coil. The auxiliary coil is formed in a loop outside the core with its center located on or near the vertical axis of the deflection yoke device, and is wound and arranged orthogonally to the vertical axis. In a deflection yoke device configured to generate a magnetic field reverse to a magnetic field leaking to the outside of the core among the horizontal deflection magnetic fields generated by the horizontal deflection coil by the auxiliary coil, a cross-section having a substantially U-shape made of a conductive resin. The magnetic shield plate of the saddle type horizontal deflection coil and the opening crossing portion of the auxiliary coil or the saddle type horizontal deflection coil opening portion of the crossing portion. Is to St. provide deflection yoke apparatus being characterized in that mounted on the top of the auxiliary coil.

Further, a pair of saddle type horizontal deflection coils and toroidal or saddle type vertical deflection coils wound along the inner surface of the core and a pair of auxiliary coils are connected in series to the horizontal deflection coils. The auxiliary coil is formed in a loop outside the core with its center located on or near the vertical axis of the deflection yoke device, and is wound and arranged orthogonally to the vertical axis. In a deflection yoke device configured such that, of the horizontal deflection magnetic field generated by the horizontal deflection coil, a magnetic field reverse to the magnetic field leaking to the outside of the core is generated by the auxiliary coil, a metal foil is sandwiched between insulating resins. A magnetic shield plate having a substantially U-shaped cross-section is provided, and the crossing portion of the opening of the saddle-shaped horizontal deflection coil and the lower portion of the auxiliary coil or the opening of the saddle-shaped horizontal deflection coil Is to St. provide deflection yoke apparatus according to claim crossing portion between the mounted on an upper portion of the auxiliary coil.

[0013]

With the above-mentioned structure, the unwanted radiation, which is rather increased by the auxiliary coil, is transferred to the crossing portion of the opening of the saddle type horizontal deflection coil and the crossing of the lower portion of the auxiliary coil or the opening of the saddle type horizontal deflection coil. It can be reduced by a magnetic shield plate mounted on the part and the upper part of the auxiliary coil.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a deflection yoke device of the present invention, the same parts as those of the conventional technique are designated by the same reference numerals, and the detailed description thereof will be omitted.

First, FIG. 1 shows the appearance of a deflection yoke device of the present invention, and FIG. 2 shows a top view of the deflection yoke device.
As shown in the drawings, the features of the present invention are that a saddle-shaped horizontal deflection coil 2 has a crossing portion of an opening (see a portion indicated by an arrow A in FIG. 1) and an auxiliary coil 4 or a saddle-shaped horizontal deflection coil. The magnetic shield plate 5 is attached to the crossing portion of the opening 2 and the upper portion of the auxiliary coil 4.

FIG. 3 is a perspective view showing the appearance of the magnetic shield plate 5. The magnetic shield plate 5 has a substantially U-shaped cross section, and has various configurations such as molding with a ferrite resin, molding with a conductive resin, and sandwiching a metal foil between insulating resins. Can be applied. Since the deflection yoke device is under high pressure, it is recommended to use the above-mentioned ferrite resin or a metal foil sandwiched between insulating resins.

FIG. 4 shows the deflection yoke device A shown in FIG.
FIG. 5 is a sectional view taken along line AA ′, and FIG. 5 is a sectional view taken along line BB ′ of the deflection yoke device shown in FIG. 1. As is clear from FIG. 4, among the magnetic fields generated by the horizontal deflection coil, the magnetic field 6c leaking as unnecessary radiation and the magnetic field 7a due to the side surface of the auxiliary coil have different directions, and as is clear from FIG. 5, leaking as unnecessary radiation. The magnetic field 6e and the magnetic field 7b generated by the lower portion of the auxiliary coil are shielded by the magnetic shield plate and do not adversely affect the outside.

The magnetic shield plates may be attached to both the upper and lower sides, or may be attached only to the lower portion or only to the upper portion.

[0019]

As described above in detail, according to the present invention, a pair of saddle type horizontal deflection coils and toroidal or saddle type vertical deflection coils wound along the inner surface of the core,
A pair of auxiliary coils are connected in series to the horizontal deflection coil, and the auxiliary coils are formed in a loop outside the core with their centers located on or near the vertical axis of the deflection yoke device, and The auxiliary coil is arranged so as to be wound so as to be orthogonal to the vertical axis, and a magnetic field opposite to the magnetic field leaking to the outside of the core is generated by the auxiliary coil among the horizontal deflection magnetic fields generated by the horizontal deflection coil. In the deflection yoke device, magnetic shield plates are attached to the crossing portion of the opening of the saddle-type horizontal deflection coil and the lower portion of the auxiliary coil or the crossing portion of the opening of the saddle-type horizontal deflection coil and the upper portion of the auxiliary coil. Therefore, it is possible to reduce unnecessary radiation, which is increased by the auxiliary coil, by the magnetic shield plate.

A pair of saddle type horizontal deflection coils and a toroidal or saddle type vertical deflection coil wound along the inner surface of the core and a pair of auxiliary coils are connected in series to the horizontal deflection coil. The auxiliary coil is formed in a loop outside the core with its center located on or near the vertical axis of the deflection yoke device, and is wound and arranged orthogonally to the vertical axis. A deflection yoke device configured to generate a magnetic field reverse to a magnetic field leaking to the outside of the core among the horizontal deflection magnetic fields generated by the horizontal deflection coil by the auxiliary coil,
A magnetic shield plate made of a ferrite resin and having a substantially U-shaped cross section is provided with a crossing portion of the opening of the saddle-shaped horizontal deflection coil and a lower portion of the auxiliary coil or a crossing portion of the opening of the saddle-shaped horizontal deflection coil and the auxiliary coil. I attached it to the top of
Unnecessary radiation increased by the auxiliary coil can be reduced by the magnetic shield plate made of ferrite resin and having a substantially U-shaped cross section.

A pair of saddle type horizontal deflection coils and a toroidal or saddle type vertical deflection coil wound along the inner surface of the core and a pair of auxiliary coils are connected in series to the horizontal deflection coil. While forming the auxiliary coil in a loop shape with the center of the auxiliary coil positioned on or near the vertical axis of the deflection yoke device outside the core, and arranged in a winding shape orthogonal to the vertical axis. In a deflection yoke device configured to generate a magnetic field reverse to a magnetic field leaking to the outside of the core out of the horizontal deflection magnetic field generated by the horizontal deflection coil by the auxiliary coil, a cross-section having a substantially U-shape made of a conductive resin. The magnetic shield plate of the saddle type horizontal deflection coil and the opening crossing portion of the auxiliary coil or the saddle type horizontal deflection coil opening portion of the crossing portion. So it was mounted on the upper part of the auxiliary coil,
Unnecessary radiation, which was increased by the auxiliary coil,
It can be reduced by a magnetic shield plate made of a conductive resin and having a substantially U-shaped cross section.

Further, a pair of saddle type horizontal deflection coils and a toroidal or saddle type vertical deflection coil wound along the inner surface of the core and a pair of auxiliary coils are connected in series to the horizontal deflection coil. The auxiliary coil is formed in a loop outside the core with its center located on or near the vertical axis of the deflection yoke device, and is wound and arranged orthogonally to the vertical axis. In a deflection yoke device configured such that, of the horizontal deflection magnetic field generated by the horizontal deflection coil, a magnetic field reverse to the magnetic field leaking to the outside of the core is generated by the auxiliary coil, a metal foil is sandwiched between insulating resins. A magnetic shield plate having a substantially U-shaped cross-section is provided, and the crossing portion of the opening of the saddle-shaped horizontal deflection coil and the lower portion of the auxiliary coil or the opening of the saddle-shaped horizontal deflection coil Since it is mounted on the crossover part of the auxiliary coil and the upper part of the auxiliary coil, the unnecessary radiation, which is rather increased by the auxiliary coil, can be reduced by a magnetic shield plate having a substantially U-shaped cross section formed by sandwiching a metal foil between insulating resins. it can.

[Brief description of drawings]

FIG. 1 is a perspective view showing the outer appearance of a deflection yoke device of the present invention.

FIG. 2 is a top view showing the outer appearance of the deflection yoke device of the present invention.

FIG. 3 is a perspective view showing the appearance of a magnetic shield plate.

FIG. 4 is a sectional view of a main part of a deflection yoke device of the present invention.

FIG. 5 is a sectional view of a main part of a deflection yoke device of the present invention.

FIG. 6 is a perspective view showing the outer appearance of a conventional deflection yoke device.

FIG. 7 is a top view showing the appearance of a conventional deflection yoke device.

FIG. 8 is a sectional view of a main part of a conventional deflection yoke device.

FIG. 9 is a sectional view of a main part of a conventional deflection yoke device.

FIG. 10 is a perspective view showing the appearance of a conventional deflection yoke device.

FIG. 11 is a top view showing the appearance of a conventional deflection yoke device.

FIG. 12 is a sectional view of a main part of a conventional deflection yoke device.

FIG. 13 is a cross-sectional view of a main part of a conventional deflection yoke device.

[Explanation of symbols]

 1 Deflection yoke device body 2 Horizontal deflection coil 3 Vertical deflection coil 4 Auxiliary coil 5 Magnetic shield plate 6a Electron beam deflection magnetic field 6b Magnetic field in core 6c Magnetic field leaking as unnecessary radiation 6d Magnetic field leaking as unnecessary radiation 6e Magnetic field leaking as unnecessary radiation 7a Auxiliary Magnetic field from side of coil 7b Magnetic field from lower part of auxiliary coil 7c Magnetic field from upper part of auxiliary coil

Claims (4)

[Claims] 1. A pair of saddle-type horizontal deflection coils and a toroidal or saddle-type vertical deflection coil wound along the inner surface of a core, and a pair of auxiliary coils connected in series to the horizontal deflection coil. The auxiliary coil is formed in a loop outside the core with its center located on or near the vertical axis of the deflection yoke device, and is wound and arranged orthogonally to the vertical axis. In a deflection yoke device configured to generate a magnetic field reverse to a magnetic field leaking to the outside of the core among the horizontal deflection magnetic fields generated by the horizontal deflection coil by the auxiliary coil, a magnetic shield plate is used for the saddle type horizontal deflection. It is characterized in that it is mounted on the crossover of the opening of the coil and the lower part of the auxiliary coil or on the crossover of the opening of the saddle-shaped horizontal deflection coil and on the upper part of the auxiliary coil. Deflection yoke device. 2. A pair of saddle-type horizontal deflection coils and a toroidal or saddle-type vertical deflection coil wound along the inner surface of the core, and a pair of auxiliary coils connected in series to the horizontal deflection coil. The auxiliary coil is formed in a loop outside the core with its center located on or near the vertical axis of the deflection yoke device, and is wound and arranged orthogonally to the vertical axis. In a deflection yoke device configured to generate a magnetic field reverse to a magnetic field leaking to the outside of the core among the horizontal deflection magnetic fields generated by the horizontal deflection coil by the auxiliary coil, the cross section is made of ferrite resin and has a substantially U-shaped cross section. A magnetic shield plate is provided between the saddle-shaped horizontal deflection coil opening part and the auxiliary coil lower part or the saddle-shaped horizontal deflection coil opening part crossing part and the auxiliary. A deflection yoke device mounted on the upper part of a coil. 3. A pair of saddle type horizontal deflection coils and a toroidal or saddle type vertical deflection coil wound along the inner surface of the core, and a pair of auxiliary coils connected in series to the horizontal deflection coil. The auxiliary coil is formed in a loop outside the core with its center located on or near the vertical axis of the deflection yoke device, and is wound and arranged orthogonally to the vertical axis. In a deflection yoke device configured to generate a magnetic field reverse to a magnetic field leaking to the outside of the core among the horizontal deflection magnetic fields generated by the horizontal deflection coil by the auxiliary coil, a cross-section having a substantially U-shape made of a conductive resin. The magnetic shield plate of the saddle type horizontal deflection coil and the auxiliary coil and the lower part of the auxiliary coil or the saddle type horizontal deflection coil opening of the auxiliary coil. The deflection yoke device is characterized in that it is mounted on the upper part of the cable. 4. A pair of saddle type horizontal deflection coils and a toroidal or saddle type vertical deflection coil wound along the inner surface of the core, and a pair of auxiliary coils connected in series to the horizontal deflection coil. The auxiliary coil is formed in a loop outside the core with its center located on or near the vertical axis of the deflection yoke device, and is wound and arranged orthogonally to the vertical axis. In a deflection yoke device configured such that, of the horizontal deflection magnetic field generated by the horizontal deflection coil, a magnetic field reverse to the magnetic field leaking to the outside of the core is generated by the auxiliary coil, a metal foil is sandwiched between insulating resins. A magnetic shield plate having a substantially U-shaped cross section, and a crossing portion of the opening portion of the saddle-shaped horizontal deflection coil and the lower portion of the auxiliary coil or the opening portion of the saddle-shaped horizontal deflection coil. A deflection yoke device mounted on a portion and an upper portion of the auxiliary coil.