JPS6070647A - Deflecting yoke - Google Patents

Abstract

PURPOSE:To make unbalanced winding distribution symmetrical with respect to an X or Y axis and thereby facilitate deformation correction from the outside by constructing a deflecting coil consisting of a pair of coils wound in the opposite direction with each other. CONSTITUTION:One of a pair of horizontal or vertical coil is first formed by winding an elementary wire in a gap of the saddle former of a reel in the order of 1 2 3 4 5 (corresponding to 1) 2 ... as shown in a drawing (A). Then, the other coil is formed by winding a wire in the gap of the saddle former of a reel in the quite opposite direction in the order of 1' 2' 3' 4' 5' (corresponding to 1') 2' ... With such constitution, if a dense part of the winding distribution is assumed to be formed, e.g., on the left side of the one of the coils, the other coil forms its dense part at the same part on the right side thereof, allowing the dense parts La of the winding distributions of the coils 10 and 11 to be symmetrically positioned with respect to an X axis. Accordingly, it is possible to make symmetrical winding distribution error with respect to the X axis or a Y axis, allowing distortion correction from the outside to be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in deflection yokes used in cathode ray tubes.

A deflection yoke made of silk laminated loidal coils is used. Among these, saddle-type deflection coils are conventionally known in which two winding dies are placed in a winding machine, and the wire is slip-wound in the saddle-shaped gap formed between these winding dies. After winding, the coil is heated to generate heat, melting the adhesive layer around the strands and fusing the strands together, forming a single piece. It is usually created by the method of . In this case, the strands are 1-
It will be rolled into the winding die in the order of 2 → 6-・4-5 (corresponding to 1) → 2, and will be formed into a predetermined saddle shape.
2 in the diagram. 5. Due to the difference in the direction change of the strands at each point 4 and 5 and the difference in the sliding direction of the wire with respect to the surface of the winding form, unevenness occurs in the distribution of the strands wound on the winding form. There was a point at 6!1 where the line distribution becomes non-sentential/first person. For example, the winding distribution on one side may be uniform, and the winding distribution on the other side may have a dense portion. Therefore, when a pair of saddle-shaped coils is used to form a horizontal or vertical deflection coil, the density of the winding distribution of the saddle-shaped coil is 21°, as shown in the cross-sectional view in Figure 2. The area La is arranged symmetrically with respect to two axes that intersect with the X-axis and the Y-axis. It becomes unbalanced axially and first-orderly, that is, point-symmetrically.As is well known, it is extremely difficult to correct this distortion from the outside.

The present invention was made in order to eliminate the above-mentioned drawbacks, and a deflection coil is constructed by forming a pair of one fill wound in one direction and one coil wound in the opposite direction. This provides a deflection yoke that is symmetrical about the X or Y axis.

Hereinafter, one embodiment of the present invention will be described in detail. In the following explanation, the present invention will be explained by taking as an example a case in which the present invention is applied to a saddle-shaped coil, but the present invention can also be applied to coils with other winding modes such as toroidal winding.
And as shown by the arrow in FIG. 4(A), 1→2−
It is formed by winding the strands into the saddle-shaped gap of the hollow shape in the order of 3→4-5 (IL [reaction)]-2-...

That is, it is formed in the same manner as conventionally. Next, see Figure 3 (
13) and FIG. 4(B), this time, in the direction completely opposite to No. 6N(A) and FIG. 4(A), 1°-"g→3°→4"→ 5' (corresponds to 1 degree) → 2' →
The other coil of the pair is formed by winding the winding wire into the saddle-shaped gap of the winding die in the order of .

In this way, when a pair of deflection coils are wound in opposite directions, for example, if there is a part with a dense winding PN distribution on the left side of one coil, the other coil's Since they are wound in opposite directions, a dense winding distribution is created in the same area on the right side.In the present invention, in which the coils are combined to form a pair of deflection coils,
The uneven portions of the winding distribution of both coils, in this case the dense portions, are preferably at 180° different positions. That is, as shown in the lOT plane view in FIG. 5, the part La of one coil 1° with a dense winding distribution and the part La of a dense winding distribution of the other coil 11 are symmetrical with respect to the X axis. position. Therefore, although the deflection field will be perpendicular to the X-axis everywhere, horizontal-vertical cross-talk is greatly reduced and alignment is simplified. Furthermore, since the correction of the deflection error on the cathode ray tube screen can be done using the X-axis seal f'l, it is simple.

For example, correction magnetic pieces (a magnetic field receiver consists of a magnetic field receiver and a magnetic field forming part, such as a cross arm or magnet attached to the head side of the deflection yoke), a convergence yoke, and a bin cook can correct misconvergence and mislanding distortion. When correcting with a 1-in correction circuit, etc., the reduction of magnetic pieces and the IWj of the circuit
The monomorphic carp becomes capable.

Furthermore, the adjustment of the winding form is simplified. That is, since the appearance of errors is two-dimensional, there are many excellent advantages, such as the ability to easily and quickly perform analysis, sliding portion correction, etc., both during production and manufacturing control.

In the present invention, since one of the coils is wound in the opposite direction, it goes without saying that the coil connection is completely opposite to that of the conventional method. Further, in the case of toroidal winding, the winding distribution errors of both coils may be Y@symmetrical, and in this case, the same advantages as described above can be obtained.

As described above, according to the present invention, the winding distribution error of the deflection coil of -E4 can be set to X@λ, or Y@'1. J
Therefore, the various advantages described above can be obtained compared to the conventional Z-axis symmetry, and the effects are remarkable. In particular, there is a tendency for systems to add various external correction means for high definition and high resolution to increase in the future, and the present invention can exhibit even more excellent effects in such systems.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram illustrating a conventional saddle-shaped coil in a reduced rotation mode, and Fig. 2 is a schematic diagram showing an example of a deflection coil using a conventional saddle-shaped coil! ljr side view, Figure 6 (A) and (B)
4(A) and (13) are schematic diagrams illustrating the winding mode of the saddle-shaped coil of the deflection yoke according to the present invention, and FIGS. It is a schematic cross-sectional view illustrating a pair of deflection coils of a deflection yoke according to 10.11 = Deflection coil, dense portion of La two-winding distribution, Patent applicant Denki Acoustic Co., Ltd.

Claims (1)

[Claims] A deflection yoke having at least one pair of deflection coils, wherein one coil of the pair is wound in one direction, and the other coil of the pair is wound in a direction opposite to the one coil. .