JPH0554825A - Deflection yoke - Google Patents

Abstract

PURPOSE:To provide a highly accurate deflection yoke which can be applied in large-screen EDTV and HDTV that use a wide angle deflection cathode-ray tube of more than 100 degrees and which is free from the danger of heating and temperature rise. CONSTITUTION:A deflection yoke is provided with a slot core 1 having a plurality of grooves provided in the inner surface thereof, vertically deflecting coils 2 wound into the shape of a toroid within the grooves of the slot core 1, and horizontally deflecting coils 4 wound into the shape of a saddle on a molding bobbin 3 having grooves provided in the inner surface thereof. The substantial bore of the core is reduced by the slot core 1 and the deflection sensitivity of the yoke is thus greatly enhanced to compensate for deterioration of the deflection sensitivity caused by the horizontally deflecting coils 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke device used in a color cathode ray tube display or the like, and in particular, the maximum deflection angle exceeds 100 degrees, and E
The present invention relates to a deflection yoke device for televisions such as DTV and HDTV whose horizontal deflection frequency exceeds 30 KHZ.

[0002]

2. Description of the Related Art FIG. 4 is an external view showing a conventional deflection yoke device. In FIG. 4, 1 is a core, 2 is a vertical deflection coil wound around the core 1 in a toroidal shape, and 3 is a saddle type inside. Is a forming bobbin that holds the horizontal deflection coil.

FIG. 5 is an external view of a core used in a conventional deflection yoke device. The core 1 has a trumpet-like cylindrical shape.

Next, a conventionally used winding method will be described with reference to FIGS. 6 and 7. FIG. 6 is a view showing a state in which a vertical deflection coil is wound around a conventional core by a toroidal winding method, and FIG. 7 is a perspective view showing a structure of a toroidal winding machine used in the winding method of FIG.

In FIG. 7, reference numeral 5 is a chucking jig for chucking a part of the core 1, and the chucking jig 5 is erected on a rotary table 7 via a column 8. . Reference numeral 6 denotes a winding jig for winding the vertical deflection coil 2 on the core 1, which is rotatably supported in the arrow direction.

Next, the operation of the above configuration will be described. First, one end of the vertical deflection coil 2 is locked at an appropriate position of the chucking jig 5, and the rotary table 7 is rotated in the arrow direction at a predetermined speed, and at the same time, the winding jig 6 is rotated in the arrow direction. By this continuous operation, as shown in FIG. 6, the vertical deflection coil 2 is wound around the core 1.

According to the above winding method, since the winding speed per turn is very high, there are advantages that the winding time can be shortened and high inductance can be easily obtained. Since the winding is performed in the chucked state, high accuracy is required for positioning the chucking jig 6 and the core 1, and winding collapse easily occurs.

FIG. 8 shows a structure of a conventional saddle type coil. FIG. 8A shows a saddle type coil wound by a die winding (referred to as a die saddle type coil). B) is a saddle type coil (referred to as a slit saddle type coil) wound around a molding bobbin 4 having a groove on its inner surface.

The former die saddle coil is a coil formed by winding a copper wire having a fusion layer between the windings set by the die, and finally applying an electric fusion press. Since the winding speed per turn is fast, there is an advantage that the winding time can be shortened, but on the other hand, there is a disadvantage that the coil characteristics tend to vary due to variations in the diameter of the copper wire and energization conditions.

On the other hand, the latter slit saddle type coil has an advantage that a very high winding accuracy can be obtained since the slit saddle type coil is wound in a predetermined groove of the forming bobbin, but on the other hand, the winding speed per one turn. Winding time is long due to the slow speed.

Further, since the forming bobbin has a groove, the amount of copper wire cannot be increased, and in order to give the forming bobbin a certain strength, the forming bobbin itself must be thickened.
As a result, the inner diameter of the core is increased. In this way, when the inner diameter of the core increases,
Since the sensitivity of the deflection yoke is deteriorated, there is an inconvenience that heat generation and temperature rise increase.

Incidentally, FIG. 9A shows a sectional shape of a deflection yoke device using the die saddle coil shown in FIG. 8A, and FIG. 9B shows FIG. 8B. 3 is a sectional view showing a deflection yoke device using the slit saddle type coil shown in FIG.

In most conventional televisions, a deflection yoke device using a metal mold saddle type coil is used, but for a large television or the like which requires high accuracy, a deflection yoke device using a slit saddle type coil is used. Devices are becoming in use.

However, in recent years, televisions have become larger in screen size, and image quality is being improved in EDTV, HDTV, and the like. As a technique necessary for this, wide-angle deflection for reducing the depth (currently 110 Degree deflection is the mainstream, and the horizontal deflection frequency is increased to increase the number of scanning lines (15.75KHZ in the current NTSC).
On the other hand, EDTV is 31.5KHZ, HDT
In V, it will be 33.75KHZ).

This tendency leads to an increase in deflection power and high frequency loss, and the deflection yoke device using the conventional slit saddle type coil cannot obtain high deflection sensitivity, resulting in heat generation and temperature rise. There was the inconvenience of becoming large. Further, when the die saddle coil is used, it is difficult to control the winding accuracy corresponding to the EDTV / HDTV, and there is a disadvantage that the yield is deteriorated and the cost is increased.

[0016]

As described above, in a large screen EDTV / HDTV, in the deflection yoke device using the slit saddle type coil, heat generation and temperature rise are technical problems, and the die saddle type coil is a technical problem. In the deflection yoke device using, there is a problem that it is difficult to control the winding accuracy.

The present invention has been made in order to solve the above problems, and particularly, in a deflection yoke device using a slit saddle type coil, high deflection sensitivity is realized, and deterioration of the deflection sensitivity due to the slit saddle type coil is realized. It is an object of the present invention to provide a highly accurate deflection yoke device that acts as a supplement and does not generate heat or rise in temperature.

[0018]

To achieve the above object, in the deflection yoke device according to the present invention, a core (slot core) having a plurality of grooves formed on the inner surface thereof and a toroidal shape in the grooves of the core are provided. The vertical deflection coil wound on the inner side and the horizontal deflection coil wound on the molding bobbin having the groove on the inner surface in the saddle shape are provided.

[0019]

According to the present invention, since the slot core reduces the substantial inner diameter of the core, the deflection sensitivity is greatly improved.
This acts to compensate for the deterioration of the deflection sensitivity due to the slit saddle type coil. Therefore, even if a slit saddle type coil capable of highly accurate winding is used, there is no fear of heat generation and temperature rise, and it can be used for large screen EDTV / HDTV.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is an external view of a deflection yoke device according to an embodiment of the present invention, and FIG. 2 is a sectional view of the deflection yoke device of FIG. In these drawings, 1 is a ferrite core (slot core) having a plurality of grooves formed on the inner surface thereof, 2 is a vertical deflection coil wound in a toroidal shape while inserting a copper wire in the groove of the core 1, Reference numeral 3 denotes a forming bobbin having a groove on its inner surface, and 4 denotes a horizontal deflection coil wound around the forming bobbin 3 in a saddle shape.

FIG. 3A is a diagram showing the slot core 1, and FIG. 3B is a diagram showing a state in which the vertical deflection coil 2 is wound around the slot core 1.

Next, the operation of the above configuration will be described. As shown in FIG. 2, since the vertical deflection coil 2 is wound in the groove provided on the inner surface of the slot core 1, the inner diameter of the core is substantially reduced. As a result, the magnetic resistance seen from the coil is reduced, and a strong and strong magnetic field can be generated with a small current. That is, the deflection sensitivity of the deflection yoke device is improved. As a result, even if the slit saddle type coil is used, it is possible to realize a highly accurate deflection yoke device in which there is no fear of heat generation and temperature rise.

The vertical deflection coil 2 is a slot core 1
Since the winding is performed in a toroidal shape in the groove provided on the inner surface, winding collapse is reduced and the accuracy of the vertical deflection coil 2 is improved.

[0024]

As described above, according to the present invention, by using the slit saddle type horizontal deflection coil and the vertical deflection coil having the toroidal winding on the slot core,
Large screen E that can realize high sensitivity, low heat generation and high precision characteristics
There is an effect that a deflection yoke device optimal for DTV / HDTV can be realized.

[Brief description of drawings]

FIG. 1 is an external view of a deflection yoke device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the deflection yoke device shown in FIG.

FIG. 3 is a diagram showing a slot core and a state in which a vertical deflection coil is wound around the slot core.

FIG. 4 is an external view of a conventional deflection yoke device.

5 is a perspective view of a core used in the deflection yoke device shown in FIG.

FIG. 6 is a diagram showing a state in which a vertical deflection coil is wound around a conventional core by a toroidal winding method.

7 is a perspective view showing the structure of a toroidal winding machine used in the winding method of FIG.

FIG. 8 is an external view showing the structure of a conventional saddle coil.

FIG. 9 is a cross-sectional view schematically showing a conventional deflection yoke device.

[Explanation of symbols]

 1 core (slot core) 2 vertical deflection coil 3 molded bobbin 4 horizontal deflection coil

Claims (1)

[Claims] 1. A core having a plurality of grooves formed on its inner surface, a vertical deflection coil wound in a toroidal shape in the groove of the core, and a saddle-shaped winding on a molding bobbin having a groove formed on the inner surface. A deflection yoke device comprising a horizontal deflection coil.