JPH02276140A - Deflection yoke - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deflection yoke that is attached to a cathode ray tube used in industrial televisions and various monitor televisions.

2. Description of the Related Art Conventional deflection yokes, as shown in Figs. 8 and 9, have a horizontal coil/I/2° vertical coil) in order to improve deflection efficiency.
The shapes of v3 and magnetic body 1 have been made so that they come into close contact with the neck of the cathode ray tube. Therefore, since the neck of the cathode ray tube has a perfect circular trumpet shape, the horizontal coil 2. Similarly, the vertical coil 3 and the magnetic body 1 had a perfect circular trumpet shape. In addition, in the figure, 4 is a fixed frame, 6 is a tightening band, 6
is a tightening screw.

Further, even in flat cathode ray tubes that have been mass-produced in recent years, the deflection yoke has a thin shape that matches the shape of the neck of the cathode ray tube. However, in the case of magnetic materials, the cross section has been a perfect circular trumpet shape, which is a conventional shape.

Problems to be Solved by the Invention In a video set, the deflection yoke consumes a large amount of power, and the horizontal coil consumes more power than the vertical coil.

Further, in the deflection yoke for a flat cathode ray tube, since the magnetic body has a perfect circular trumpet shape, it has been impossible to reduce the thickness of the entire deflection yoke.

The present invention aims to reduce power consumption by increasing the deflection efficiency of the deflection yoke and to reduce the overall thickness of the deflection yoke as a measure against the above-mentioned problems.

Means for Solving the Problems In order to solve the above problems, the present invention provides a horizontal coil of a deflection yoke that is attached to the neck of a cathode ray tube.

The vertical coil is shaped so that it comes into close contact with the neck of the cathode ray tube, and the magnetic material also has an elliptical cross section so that it comes into close contact with the neck of the cathode ray tube, the horizontal coil, and the vertical coil. .

Effect As described above, if the cross section of the magnetic material of the deflection yoke is made into an elliptical trumpet shape rather than a perfect circular trumpet shape, it is possible to increase the deflection efficiency of the horizontal coil and reduce power consumption, as well as to reduce the overall thickness of the deflection yoke. Dimensions can be made thinner.

For the above reasons, the power consumption of the entire video set can be reduced and the set can be made smaller.

Embodiment FIGS. 1 to 7 show a deflection yoke according to an embodiment of the present invention, and FIGS. 2 to 4 show the magnetic body 7 having an elliptical trumpet shape.

In Figures 1 to 7, 7 is a magnetic body made of K such as ferrite and formed in an elliptical trumpet shape. is arranged, and a vertical coil 9 is arranged on the magnetic body 7.
A fixed frame 10 is attached to the small diameter side of the horizontal coil /l/8, and a centering magnet 11 is attached to this fixed frame 1o, and a tightening band 13 having a tightening screw 12 is attached. has been configured.

By making the vertical dimension of the trumpet openings 7&, 7b of the magnetic body 7 smaller than the horizontal dimension and forming an elliptical shape, the thickness direction of the entire deflection yoke becomes thinner, and at the same time, the horizontal deflection magnetic force dimension is reduced to a perfect circular shape. When the same deflection current is passed through the horizontal coil/L/8, the horizontal deflection magnetic force is stronger when the magnetic body 7 has a smaller vertical dimension, and the horizontal deflection magnetic force is stronger. The horizontal amplitude becomes wider on the screen as well. This means that when the same horizontal amplitude is obtained, if the magnetic body 7 is made into an elliptical shape, the deflection current will be smaller and the power consumption can be reduced.

Note that if the magnetic body 7 is made into an elliptical shape and the oblateness is increased, the dimension of the horizontal deflection magnetic force becomes shorter and the deflection efficiency becomes higher;
If done to an extreme, the flow of the vertical deflection magnetic force will be distorted and the image on the screen of the cathode ray tube will be distorted, so it is of course necessary to match the horizontal and vertical oblateness to the neck shape of the cathode ray tube. However, O0S~1.
O is desirable to be 0. Effects of the Invention As described above, in the deflection yoke attached to the neck of the cathode ray tube, the cross-sectional shape of the magnetic body is made elliptical, so that the thickness direction dimension of the entire deflection yoke can be reduced. Since it can be made thinner, the deflection efficiency in the horizontal coil can be increased and power consumption can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the deflection yoke of the present invention;
Figures 2 to 4 are a plan view, front view, and side view of the magnetic material used in the deflection yoke, Figures 6 and 6 are a half-sectional front view and bottom view of the same embodiment, and Figure 7 is the same. A sectional view of the embodiment, FIG. 8 is a front view of a conventional deflection yoke, and FIG. 9 is a sectional view of the same. 7...Magnetic material, 8...Horizontal coil, 9
・・・・・・Vertical carp〃, 1o・・・Fixed frame, 1
1... Centering magnet, 12...
...Tightening screw, 13...Tightening band. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] A deflection yoke that is attached to the neck of a cathode ray tube and is made up of a horizontal coil, a vertical coil, and a magnetic material, and the magnetic material has an elliptical cross section.