JPH09283050A - Deflection yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deflection yoke capable of changing the winding and easily correcting various misconvergences by providing specific multiple lugs on a coil bobbin. SOLUTION: A wire 16 is wound on a substantially funnel-shaped coil bobbin 20 to form the horizontal coil or vertical coil of this deflection coil. The winding angle of the wire 16 of the coil bobbin 20 is regulated at the neck bend side end, multiple lugs 23, 24 positioning the wire 16 in the axial direction of a CRT are formed, and the position for positioning the wire 16 in the axial direction is changed in the axial direction between multiple lugs 23, 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke, and more particularly, to a deflection yoke having a horizontal coil and / or a vertical coil formed by section winding, and a plurality of protrusions for controlling a winding angle on a neck bend side. By displacing the positioning of the wire rod in the tube axis direction between the protrusions, the winding can be changed and various misconvergence can be easily corrected.

[0002]

2. Description of the Related Art Conventionally, there has been a deflection yoke in which a horizontal coil and a vertical coil are formed by section winding. In such a deflection yoke, a plurality of protrusions formed on a coil bobbin are selectively formed. By winding the magnet wire to be used for the above, the winding angle is regulated by the plurality of projections to obtain a desired winding distribution, and thereby a required magnetic field distribution is formed.

That is, FIG. 4 is a perspective view showing a deflection yoke of this type. The deflection yoke 1 of this type has a front cover 3, a coil assembly 2 formed of a horizontal coil, a vertical coil and a core. After the back cover 4 is attached, the auxiliary coil 6 and the adjusting knob 7 are attached to the back cover 4.
Etc. are attached and formed.

FIG. 5 is a side view showing the coil assembly 2, and FIG. 6 is a side view showing the coil assembly 2 with the magnet wire omitted. In the coil assembly 2, the horizontal coil H is obtained by winding a magnet wire on a coil bobbin 8 which is divided into two parts by a plane including a substantially funnel shape as a central axis in a winding step.
Is formed. The horizontal coil H includes the protrusions 9 formed on the funnel side end and the neck side end of the coil bobbin 8.
It is formed by winding the magnet wire in a saddle shape by hooking the magnet wire on the magnet wire and running the magnet wire along the winding groove 10 formed inside the coil bobbin 8. At this time, the horizontal coil H selects the winding groove 10 and the protrusion 9 and winds the magnet wire, so that the winding angle is regulated by the winding groove 10 and the protrusion 9,
Winding is performed according to a preset winding distribution. In the manufacturing process of the deflection yoke, the pair of horizontal coils thus wound is assembled to form a substantially funnel-shaped horizontal coil assembly.

On the other hand, the vertical coil V has a funnel-shaped end portion and a neck-side end portion similar to the horizontal coil H with respect to the coil bobbin 11 divided into two parts by a plane including a funnel shape in the center axis. It is formed by hooking a magnet wire on the formed protrusion 9 and running the magnet wire along a winding groove formed inside the coil bobbin 11. At this time, the vertical coil V, like the horizontal coil H,
The winding angle is regulated by the winding groove and the protrusion 9, and the winding is performed according to a preset winding distribution.

In the manufacturing process of the deflection yoke, after assembling the pair of vertical coils V wound in this way so as to surround the outer side of the substantially funnel-shaped horizontal coil assembly,
Further, a conical cylindrical core 12 is arranged so as to surround the outside of the vertical coil V.

In the deflection yoke thus produced, the coil bobbins 8 (1
In 1), as shown in a side view and a front view of the neck bend side in an enlarged manner in FIG. 7, the bobbin main body 14 is formed in a substantially arc-shaped cross section along the outer shape of the cathode ray tube. A winding groove is formed in the. Further, a collar 15 perpendicular to the tube axis of the cathode ray tube is formed on the neck bend side of the bobbin main body 14, and an L-shaped projection 9 is formed on the collar 15 corresponding to the winding groove.
Is formed. As a result, on the neck bend side, the horizontal coil H and the vertical coil V move in the circumferential direction of the cathode ray tube along the brim 15 after the magnet wire 16 pulled out from the winding groove is hooked on the corresponding protrusion 9. The wire is wound around a predetermined angle, hooked on the protrusion 9 again, and returned to the winding groove.

The funnel bend side is formed similarly to the neck bend side. As a result, in the manufacturing process of the deflection yoke, the protrusions 9 that restrict the winding distribution are selectively used to wind the horizontal coil H and the vertical coil V at a desired winding angle, and to obtain the desired winding distribution. A necessary magnetic field distribution is formed, and at this time, the horizontal coil H and the vertical coil V are formed by the collar 15 formed at the base of the protrusion 9.
The length of the tube in the tube axis direction is set to a constant length.

[0009]

By the way, in a cathode ray tube device to which a deflection yoke of this kind is applied, misconvergence in which the deflection magnetic field must be corrected to the opposite tendency may occur at the same time.

That is, FIG. 8 shows a misconvergence pattern called a so-called XH positive pattern. This misconvergence is such that the red vertical line R is displaced to the left with respect to the blue vertical line B on the left and right of the display screen. Will be displayed. This XH positive pattern can be corrected by changing the horizontal deflection magnetic field to the tendency of the pin field.

In this case, as shown in FIG. 9, in both the neck bend side (FIG. 9 (A)) and the funnel bend side (FIG. 9 (B)) of the coil bobbin 8, the winding distribution of the magnet wire 16 is horizontal. As shown by arrows A and B, the projection 9 to be wound is changed and the winding groove of the magnet wire 16 is changed so that the deflection magnetic field is brought closer to the pin magnetic field as shown in FIG. Can be dealt with.

On the other hand, FIG. 11 shows a pattern of misconvergence called a so-called HCR negative pattern. This misconvergence overlaps red and blue on the green vertical line G on the left and right of the display screen. The displayed vertical line (that is, a vertical line of magenta) RB is displayed by being displaced to the left and right outside. This HCR negative pattern is
Contrary to the XH positive pattern, the horizontal deflection magnetic field can be changed to a barrel magnetic field tendency for correction.

That is, as shown in FIG. 12, on both the neck bend side (FIG. 12 (A)) and the funnel bend side (FIG. 12 (B)) of the coil bobbin 8, the winding distribution of the magnet wire 16 has a horizontal axis X. To get further away,
As shown by arrows C and D, by changing the protrusion 9 to be wound and changing the winding groove of the magnet wire 16,
The deflection magnetic field can be brought close to the barrel magnetic field as shown in FIG.

As a result, in the conventional deflection yoke, when misconvergence of the XH positive pattern and the HCR negative pattern occurs, it is difficult to change the winding of the magnet wire to adjust the convergence, and eventually the auxiliary convergence. There was a problem that the correction means had to be applied. In this case, the auxiliary convergence correcting means corrects the deflection current by the auxiliary coil 6 or the like described above with reference to FIG. 4, and further, a magnetic material is attached inside the deflection yoke to locally correct the deflection magnetic field. However, if these convergence correction means are applied, there is a drawback that the structure of the deflection yoke becomes complicated and the adjustment process becomes complicated.

Similarly, FIG. 14 shows a misconvergence pattern called a so-called YH positive pattern. In this misconvergence, a blue vertical line B and a red vertical line R are reversed in the left and right of the center of the display screen. It is a pattern that is displaced in the same direction, and the displacement direction is the same in the vertical direction. On the other hand, FIG. 15 shows a misconvergence pattern called a VCR positive pattern. This misconvergence is a horizontal line RB in which red and blue are overlapped with a green horizontal line G at the top and bottom of the display screen.
Is displayed in a vertically displaced manner. In the YH positive pattern and the VCR positive pattern as well, it is necessary to correct the deflection magnetic field in the opposite tendency, and when these two misconvergences occur, the auxiliary convergence correction means is similarly applied.

FIG. 16 shows a misconvergence pattern called a so-called PQH positive pattern. In this misconvergence, a blue vertical line B and a red vertical line R are vertically aligned in the same direction on the left and right of the display screen. Displaced and displayed. On the other hand, FIG. 17 shows the so-called PQ.
This is a misconvergence pattern called a V, S1, S2, S3 positive pattern. These misconvergences are displayed by horizontally displacing a horizontal line RB in which red and blue are superimposed on a green horizontal line G in each part of the display screen. With respect to this PQH positive pattern, it is necessary to correct the deflection magnetic field in the reverse tendency also in the PQV, S1, S2, and S3 positive patterns. If misconvergence occurs, an auxiliary convergence correction means is similarly used. Will be applied.

The present invention has been made in view of the above points, and it is an object of the present invention to propose a deflection yoke which can easily correct various misconvergence by changing windings.

In order to solve the above problems, according to the present invention, at the end of the coil bobbin on the side of the neck bend, a position for positioning the wire rod in the axial direction of the plurality of projections for regulating the winding angle of the wire rod. Is displaced in the tube axis direction.

By displacing the position of the wire rod in the tube axis direction, the length of the horizontal coil and / or the vertical coil on the neck bend side is locally changed. Therefore, in response to this change, the magnetic field distribution on the neck bend side changes as compared to the funnel side, and the winding angle can be changed by that amount to greatly change the magnetic field distribution compared to the conventional case. Therefore, various deflection magnetic fields can be formed, and accordingly various misconvergences can be adjusted by the windings.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a side view and a plan view showing the neck bend side of a coil bobbin of a horizontal coil in an enlarged manner. In the deflection yoke according to the embodiment of the present invention, this coil bobbin 20 is applied instead of the coil bobbin 8 of the horizontal coil described above with reference to FIGS. 4 to 5.
Also for the coil bobbin of the vertical coil, a coil bobbin whose neck bend portion is configured in the same manner as this coil bobbin 20 is applied.

The coil bobbin 20 is formed by dividing a substantially funnel shape by a plane including the tube axis of the cathode ray tube, and after winding a horizontal coil, a coil bobbin of the same shape in which a horizontal coil is similarly wound. Combined to form a horizontal coil assembly.

Therefore, in the coil bobbin 20, the bobbin main body 21 is formed in a substantially arcuate cross section along the outer shape of the cathode ray tube, and the winding groove is formed inside the bobbin main body 21. Further, on the funnel bend side of the bobbin main body 21, an L-shaped projection corresponding to the collar and the winding groove is formed as in the conventional coil bobbin. On the other hand, on the neck bend side, a collar 22 perpendicular to the tube axis of the cathode ray tube is formed, and a plurality of protrusions 23 and 24 are formed on the collar 22 corresponding to the winding groove.

Of the projections 23 and 24, the two projections 23 on the left and right in the drawing, which are close to the abutting surface with the opposing coil bobbin, are L-shaped, like the projection 9 in the conventional coil bobbin 8. It is formed. On the other hand, in the remaining five protrusions 24, as with the protrusion 23, L
It is shaped like a letter and has about 1/2 of the entire length in the tube axis direction.
A collar 25 that connects the five protrusions 24 is formed at a position higher than 2. Further, the five protrusions 24 are connected between the collars 22 to 25 by a wall 26 extending from the inner side surface of the collar 22.

As a result, as shown in FIG. 2, in the coil bobbin 20, the projection 23 adjacent to the horizontal axis regulates the winding angle, and the root rib 22 positions the magnet wire in the tube axis direction. ing.
On the other hand, in the remaining protrusions 24, the winding angle is regulated, and the magnet wire is positioned in the tube axis direction by the collar 25.
By being formed in the middle of the position, the magnet wire is positioned by being displaced toward the neck bend side in the tube axis direction from the positioning position by the protrusion 23.
As a result, in the projection 24, the length of the horizontal coil in the tube axis direction is locally extended.

In the deflection yoke according to this embodiment having the above-described structure, the magnet wire is wound around the coil bobbin 20 and the horizontal coil is formed into a saddle shape by the section winding, and then the pair of coil bobbins are assembled. Horizontal coil assembly is created.

In the winding of this horizontal coil, the magnet wire is hooked on the L-shaped projection 23 or 24 formed on the neck bend side of the coil bobbin 20, and then,
The coil bobbin 20 is pulled out to the funnel bend side along the winding groove formed inside, and is hooked on the L-shaped projection formed on the funnel bend side. Further, the magnet wire circulates on the funnel bend side by a predetermined angle, is hooked by an L-shaped projection formed on the funnel bend side, and is drawn out to the neck bend side along a winding groove formed inside the coil bobbin 20. And is hooked on the protrusion 23 or 24 on the neck bend side. Further, the magnet wire goes around the neck bend side by a predetermined angle, is hooked by the protrusion 23 or 24, and is again pulled out to the funnel bend side along the groove. The horizontal coil is wound by repeating this series of winding processes.

At this time, the horizontal coil is formed by the projections 23 and 24 on the neck bend side and the projections on the funnel bend side.
The winding angle of the magnet wire hooked on each of the protrusions is regulated, whereby the protrusions 23 on the neck bend side are regulated.
And 24 and the protrusions on the funnel bend side set a predetermined winding distribution. Further, the horizontal coil has a protrusion corresponding to the protrusions 23 and 24 and a protrusion on the funnel bend side, so that the magnet wire hooked on each protrusion is positioned in the pipe axis direction. Is set.

At this time, the protrusion 2 is formed on the neck bend side.
While the magnet wire hooked on 3 orbits around the neck bend side along the collar 22, the magnet wire hooked on the protrusion 24 moves along the neck bend side along the collar 25 formed at the intermediate position of the protrusion 24. By the winding, in the winding corresponding to the protrusion 24, the positioning position is displaced and held toward the neck bend side, and thereby the length of the horizontal coil in the tube axis direction is locally extended.

As a result, the horizontal coil changes the deflection magnetic field on the neck bend side with respect to the funnel side when the winding position is changed between the protrusions 24 and when the winding position is changed between the protrusions 23. The degree can be changed, and the magnetic field distribution can be greatly changed by changing the winding as compared with the conventional case. That is, the degree of freedom of magnetic field adjustment by changing the winding can be expanded as compared with the conventional case, and as a result, the adjustable range of misconvergence can be expanded. That is, compared to the case where the winding position is changed between the protrusions 24,
Changing the winding position between the protrusions 23 can increase the change in the magnetic field on the neck bend side.

Specifically, in the misconvergence between the XH positive pattern and the HCR positive pattern described above with reference to FIGS. 8 and 11, the degree of the HCR misconvergence largely depends on the magnetic field distribution on the neck side, and vice versa. The XH misconvergence largely depends on the magnetic field distribution on the funnel side.

As a result, even if both of these two misconvergences occur, in the horizontal coil according to this embodiment, by changing the winding position between the protrusions 24, the neck bend side and the funnel bend side can be changed. Both are changed to a barrel magnetic field, and the winding position is changed between the protrusions 23 so as to supplement the barrel magnetic field on the funnel side, thereby changing the magnetic field distribution to the tendency of the barrel magnetic field only on the neck bend side. , HCR misconvergence can only be corrected.

By changing the winding position between the protrusions 23 and 24 in the same manner as described above, the protrusions 23 and 2 are further changed.
It is also possible to change the magnetic field distribution so that the neck side and the funnel side tend to contradict each other by changing the winding position between the four positions, so that the contradictory misconvergence can be corrected only by changing the winding. Therefore, the auxiliary convergence adjusting means such as the auxiliary coil can be omitted, and the structure of the deflection yoke can be simplified.

Thus, in the deflection yoke, the horizontal coil assembly thus assembled is combined with the vertical coil, and the core is mounted to form the coil assembly. Further, after the front cover and the like are attached, the steps such as adjustment are completed.

At this time, also in the vertical coil, the length in the tube axis direction is locally extended by winding the coil on a coil bobbin whose positioning position is displaced in the tube axis direction on the neck bend side. So, like the horizontal coil,
The contradictory misconvergence can be corrected only by changing the windings, and the auxiliary convergence adjusting means such as the auxiliary coil can be omitted accordingly and the structure of the deflection yoke can be simplified. Further, the work of convergence adjustment is simplified, and the time required for manufacturing is shortened accordingly.

According to the above construction, the rib 25 is formed at an intermediate position of some of the projections 24 of the L-shaped projection that regulates the winding angle on the funnel bend side.
The position of positioning in the pipe axis direction is displaced from the position of positioning by other protrusions by
The change in the magnetic field distribution on the neck bend side with respect to the funnel bend side can be changed depending on the case where the winding position is changed between the two and the case where the winding position is changed between the protrusions 24.
As a result, the degree of freedom of magnetic field adjustment by changing the winding can be increased as compared with the conventional technique, and the winding can be changed by that amount to easily correct various misconvergences. Therefore, the auxiliary convergence adjusting mechanism can be omitted accordingly, and the structure of the deflection yoke can be simplified.

In the above-mentioned embodiment, the case where the collar 25 is formed and the positioning position of the magnet wire is displaced in the tube axis direction with respect to the protrusion 24 except the protrusion 23 close to the abutting surface with the opposing coil bobbin. However, the present invention is not limited to this, and as shown in FIG. 3, for example, the ribs 25 are formed on the protrusions 23 close to the abutting surface with the opposing coil bobbins, and the protrusions 23 of the magnet wire are formed. The positioning position may be displaced in the tube axis direction.

Further, in the above-described embodiment, the protrusion 2
The case where the collar is formed at the intermediate position of 3 to displace the positioning position of the magnet wire in the tube axis direction has been described. When a protrusion is formed so as to extend along the projection, and a plurality of protrusions that protrude outward from the middle of this protrusion are formed, the positioning position of the magnet wire is displaced in the tube axis direction by various means, and magnetic field adjustment is free. The degree can be improved.

Further, in the above-described embodiment, the case where the present invention is applied to the horizontal coil and the vertical coil has been described, but the present invention is not limited to this, and is applied to either the horizontal coil or the vertical coil. Good.

In the above-described embodiment, the case where the horizontal coil and the vertical coil are formed by section winding has been described, but the present invention is not limited to this, and either the horizontal coil or the vertical coil is formed by section winding. It can be widely applied when

[0040]

As described above, according to the present invention, in the plurality of projections that regulate the winding angle on the neck bend side, the positioning of the wire rod in the tube axis direction is displaced between the projections to form the winding. The degree of freedom in adjusting the magnetic field can be increased as compared with the conventional method, and the winding can be changed accordingly to easily correct various misconvergences.

[Brief description of drawings]

FIG. 1 is a diagram showing a coil bobbin of a horizontal coil applied to a deflection yoke according to an embodiment of the present invention.

FIG. 2 is a view showing a state in which a magnet wire is wound around the coil bobbin of FIG.

FIG. 3 is a diagram showing a coil bobbin according to another embodiment of the present invention.

FIG. 4 is a perspective view showing a conventional deflection yoke.

5 is a side view showing a coil assembly applied to the deflection yoke of FIG. 4. FIG.

FIG. 6 is a perspective view showing the coil assembly of FIG. 5 with the magnet wire omitted.

7 is a diagram showing a neck bend side of a horizontal coil of the coil assembly shown in FIG. 6;

FIG. 8 is a schematic diagram showing misconvergence of an XH positive pattern.

FIG. 9 is a diagram for explaining the correction of misconvergence in FIG. 8;

FIG. 10 is a schematic diagram showing a barrel magnetic field.

FIG. 11 is a schematic diagram showing misconvergence of an HCR positive pattern.

FIG. 12 is a diagram for explaining the correction of misconvergence in FIG. 11.

FIG. 13 is a schematic diagram showing a pinned magnetic field.

FIG. 14 is a schematic diagram showing misconvergence of a YH positive pattern.

FIG. 15 is a schematic diagram showing misconvergence of a VCR positive pattern.

FIG. 16 is a schematic diagram showing misconvergence of a PQH positive pattern.

FIG. 17 is a schematic diagram showing misconvergence of PQV, S1, S2, and S3 positive patterns.

[Explanation of symbols]

1 ... Deflection yoke, 2 ... Coil assembly, 8, 1
1, 20 ... Coil bobbin, 9, 23, 24 ... Protrusion,
11 ... Core, 22, 25 ... Brim, 16 ... Magnet wire

Claims (1)

[Claims] 1. A deflection yoke in which a wire is wound around a substantially funnel-shaped coil bobbin to form a horizontal coil or a vertical coil, wherein the coil bobbin regulates a winding angle of the wire at an end on a neck bend side, It has a plurality of protrusions for positioning the wire rod in the tube axis direction of the cathode ray tube, and the plurality of protrusions are located between the plurality of protrusions and the position for positioning the wire rod in the tube axis direction is displaced in the pipe axis direction. A deflection yoke, which is formed by: