JPS63266737A - Deflecting yoke - Google Patents

Abstract

PURPOSE:To effectively damp the voltage of a coil to the fine segment of the coil and remove the ringing phenomenon on a screen by winding the coil around an insulating layer provided around a conductor with a lead wire having a conductive layer. CONSTITUTION:An insulating layer 8 is provided around a conductor 7, a vertical deflecting coil 5 is wound in a saddle shape around the insulating layer 8 with a lead wire 10 having a conductive layer 9. The approximate equivalent circuit between the conductors 7 related to the coil 5 has the distributed capacity 11 between the conductor 7 and the layer 9 and the resistance 12 inherent to the conductor 7 in addition to the internal resistance R, inductance L, and line capacity Cs inherent to the conductor 7, and the distributed capacity 11 and the resistance 12 are increased. The capacity 11 is made larger than the line capacity Cs because the thickness of the insulating layer 8 is thinner than the distance between the conductors 7 and can be referred as a short circuit for the resonant frequency in a fine segment. When the resistance 12 between the conductors 7 is increased, the voltage of the coil 5 can be effectively damped to the fine segment of the coil 5, and the ringing phenomenon on a screen can be removed.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a deflection yoke used in television receivers, cathode ray tube display devices, and the like.

<Prior Art> Generally, as a deflection yoke used in television receivers, cathode ray tube display devices, etc., it is known that the deflection yoke is constructed by winding horizontal and vertical deflection coils around a core in a saddle shape or toroidal shape. ing.

In the conventional deflection yoke, as shown in FIG. 4, a conducting wire 34 having an insulating coating 32 provided on the outer periphery of a conductor 31 and an adhesive layer 33 provided on the outer periphery of the insulating coating 32 is placed against a core 35 in a saddle shape, for example. It was made by winding around.

However, in such a configuration, as is clear from the schematic equivalent circuit shown in FIG.
1. Although there is an internal resistance R inherent in the conductor 31, an inductance L, and a line capacitance C8, the only means for damping (braking) the voltage of the conductor 64 is the internal resistance R inherent in the conductor 31, and damping is not sufficient. As a result, a ringing phenomenon occurs on the screen, significantly deteriorating the screen characteristics.

For this reason, in recent years, as a deflection yoke that can eliminate the ringing phenomenon and obtain good screen characteristics, for example, as shown in FIGS.
A pair of vertical deflection films 4 wound in a saddle shape through 1
2.43 electrical midpoint 428.43a and both ends 42b, 42C, 43b, 45C of each vertical deflection coil 42.43
It has been proposed that resistors 44, 45, 46, and 47 are connected to the openings, respectively, and the voltage of the vertical deflection coils 42, 43 is damped (braked) by the resistors 44 to 47. In FIG. 6, numerals 48 and 49 indicate a pair of horizontal deflection coils wound around the core 40 in a saddle shape.

<Problems to be Solved by the Invention> However, as shown in FIG. line midpoint) 42
a, 43a are provided, and in order to damp the voltage of the coils 42 and 43 by external resistors 44 to 47, the coils 42 and 43a are provided.
, 43, the approximate equivalent circuit shown in Figure 8 is obtained, and transient electrical vibration (ringing) can be suppressed to some extent, but the damping effect extends to the ringing component of the resonant system in the small section of the fill 42.43. It is difficult to meet the demand for higher image quality, and in addition, because a separate resistor is provided, the number of parts increases, costs increase, and workability deteriorates due to the complexity of the circuit. It had the following problems.

Means for Solving the Problems> The present invention has been made to solve the above problems.
An insulating layer is provided around the outer periphery of the conductor, and a coil is wound using a conducting wire with an electrically conductive layer provided around the outer periphery of the insulating layer.

<Embodiment> Hereinafter, one embodiment of the deflection yoke of the present invention will be described in detail with reference to the drawings. In FIG. 1, 1 is a deflection yoke;
A horizontal deflection coil 4 is wound in a saddle shape on the inner surface of the fill bobbin 6 via the core 2 and a coil bobbin 3 arranged on the inner surface of the core 2, and a horizontal deflection coil 4 is wound in a saddle shape on the outer surface of the coil bobbin 3. It is composed of a vertical deflection coil 5,
It is attached and fixed to a predetermined position of a cathode ray tube (not shown) via a tightening fixing means 6. In the deflection yoke 1, the vertical deflection coil 5 is wound in a hollow shape around the inner surface of the core 2 (outer surface of the coil bobbin 3).As shown in FIG. 8, and a conductive wire 10 provided with an electrically conductive layer, for example, an adhesive layer 9 containing a conductive substance such as carbon, on the outer periphery of the insulating layer 8.

In the deflection yoke having such a configuration, an insulating layer 8 is provided on the outer periphery of the conductor 7 with respect to the core 2, and a conducting wire 10 is provided with a conductive layer (adhesive layer containing carbon) 9 on the outer periphery of the insulating layer 8. By winding the vertical deflection coil 5 in a hollow shape, the approximate equivalent circuit related to the vertical deflection coil 5 is as follows.
As shown in FIG. 3, in addition to internal resistance 1, inductance L, and line capacitance Cs inherent to the conductor 7, there is also a distributed capacitance 11 and conductivity between the conductor 7 and the conductive layer 9. There is an inherent resistance 12 of the layer 9 with a characteristic, increasing the distributed capacitance 11 and the resistance 12 compared to conventional configurations. Here, since the thickness of the insulating layer 8 is very thin compared to the distance between the conductors 7, the distributed capacitance 11 is large compared to the line capacitance Cs, and can be considered as a short circuit for the resonance frequency in a small section. . In the present invention, there is a resistance 1 between the conductors 7.
2 is increased, the voltage of the vertical deflection coil 5 can be effectively damped to a minute section of the coil 5, and the ringing phenomenon on the screen can be eliminated.

In one embodiment of the deflection yoke of the present invention, the vertical deflection coil wound around the core in a saddle shape has been described, but it goes without saying that the present invention may also be applied to a horizontal deflection coil. Further, the winding shapes of the horizontal and vertical deflection coils are not limited to those in the embodiments, and can be changed as appropriate as necessary, and the configuration of the deflection yoke is not limited to the embodiments.

Furthermore, in one embodiment of the deflection yoke of the present invention, the conducting wires constituting the vertical deflection coil are made of a conductor and an insulating layer.

Although the insulating layer is formed using a conductive adhesive layer, it is sufficient that a conductive layer is provided on the outer periphery of the insulating layer, and is not limited to the adhesive layer.

<Effects of the Invention> As described above, according to the deflection yoke of the present invention, an insulating layer is provided on the outer periphery of the conductor, and a conductive wire is provided with a conductive layer on the outer periphery of the insulating layer, and a fill is wound around the conductor. and
This produces the following effects. In other words, the voltage of the coil is damped by the internal resistance inherent to the conductor that makes up the coil and the resistance inherent to the conductive layer.
The ringing phenomenon can be effectively eliminated (higher-order resonance can be suppressed) even in the minute section of the coil, and good screen characteristics can be obtained. Further, there is no need to provide a midpoint in the fill or to provide an external resistor, which simplifies the circuit, thereby improving workability, reducing the number of parts, and reducing costs. As described above, the deflection yoke of the present invention does not cause any ringing phenomenon on the screen, and will continue to be effective as a deflection yoke for high quality and high definition applications.

[Brief explanation of the drawing]

FIG. 1 is a side view of a deflection yoke according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the same main part, FIG. 6 is a schematic equivalent circuit diagram of the coil shown in FIG. 2, and FIG. 4 is a conventional one. Fig. 5 is a schematic equivalent circuit diagram of the coil shown in Fig. 4, Fig. 6 is a sectional view of main parts of a typical deflection yoke, and Fig. 7 shows a ringing removal means. FIG. 8 is a schematic equivalent circuit diagram of the winding (vertical deflection coil) shown in the deflection yoke of FIG. 7. 7... Conductor, 8... Insulating layer, 9... Layer having conductivity, 10... Conductive wire,

Claims (1)

[Claims] A deflection yoke characterized in that a coil is wound using a conducting wire having an insulating layer provided on the outer periphery of the conductor and a conductive layer provided on the outer periphery of the insulating layer.