JPH0963510A - Deflection yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deflection yoke in which a magnetic piece on the diagonal axial line of a screen is surely fixed to eliminate convergence errors. SOLUTION: This deflecting yoke has a pair of funnel-form cores, a vertical deflection coil provided inside the respective cores, a winding frame 1 provided inside the vertical deflection coil and a horizontal deflection coil 3 in which an electric wire is wound along an electric wire guide wall 2 provided in the inner circumferential surface of the winding frame 1. A cut part 21 is provided in the position in which the diagonal axial line 20 of a screen passing through the winding frame 1 and the base side edge part 5 of the electric wire guide wall 2 cross each other in the inner circumferential surface, and at the same time a magnetic piece 9 is disposed in the cut part 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke to be combined with a cathode ray tube used in a television receiver or the like.

[0002]

2. Description of the Related Art A conventional deflection yoke will be described below with reference to the drawings. FIG. 5 is a side sectional view of a conventional deflection yoke, and FIG. 6 is a front view of the conventional deflection yoke. In FIGS. 5 and 6, 1 is a winding frame around which a coil for horizontal deflection is wound, 2 is an electric wire guide wall provided on the inner peripheral surface of the winding frame 1 to guide the winding of electric wires, and 3 is an electric wire guide. Wall 2
A horizontal deflection coil wound along the horizontal deflection coil 4, a fan-shaped trapezoidal portion forming a winding window of the horizontal deflection coil 3, 5 a side edge of the winding window of the horizontal deflection coil 3, and 6 vertical deflection Winding frame for winding a coil for use, 7 is a vertical deflection coil wound around the winding frame 6, 8 is a funnel-shaped core divided into two, and 9 is a trapezoid of the inner peripheral surface of the winding frame 1. Magnetic pieces 10 provided on the portion 4 and the horizontal deflection coil 3 are adhesive tapes for adhering the magnetic pieces 9.

The operation of the deflection yoke having such a structure will be described below. FIG. 7 is a perspective view in which a conventional deflection yoke is attached to a cathode ray tube, and FIG. 8 is a view showing a screen of the cathode ray tube in which the electron beam in the conventional deflection yoke is deflected. In FIG. 7, 11 is a cathode ray tube, and 12
Is an electron gun provided in the cathode ray tube 11, 13 is an electron gun 12
The emitted electron beam, 14 is the screen of the cathode ray tube 11. Then, the horizontal deflection coil 3 divided in the vertical direction of the cathode ray tube 11 is arranged. When the horizontal deflection coil 3 is arranged in this manner, the electron beam 13 emitted from the electron gun 12 is arranged.
Is deflected in the horizontal direction. Further, although not shown, the vertical deflection coil 7 is rotated 90 degrees from the horizontal deflection coil 3 and divided in the left-right direction to be arranged between the horizontal deflection coil 3 and the core 8 so that the electron beam 13 emitted from the electron gun 12 is vertically oriented. Is biased to.

The conventional deflection yoke uses the electron beam 1
When 3 is respectively deflected, a convergence error occurs as shown in the screen 14 of FIG. That is, screen 14
The red line 15 of the electron beam 13 is shown by the vertical line around the diagonal axis of
Will be on the right side of the blue color 16. Such a pattern is generally called PQH overconvergence. The PQH overconvergence is generated when the aspect ratio of the screen 14 of the cathode ray tube 11 is 3 :.
Since it has a rectangular shape of 4 or 9:16, the length in the diagonal axis direction is the longest, but it is considered that this is caused by a static convergence error that occurs because the deflection sensitivity in the diagonal axis direction is too good.

Therefore, the static convergence error will be described. Schematic diagrams of the operation of the cathode ray tube 11 are shown in FIGS. 9 (a) and 9 (b). FIG.
FIG. 9A is a schematic diagram of a state of a screen in which a deflection magnetic field is applied and deflected in a conventional deflection yoke, and FIG. 9B is a schematic diagram of a screen in which dynamic convergence is adjusted by the deflection magnetic field in the conventional deflection yoke. Is. FIG. 9 (a)
9B, the screen 14 of the cathode ray tube 11 includes a horizontal axis line 17, a vertical axis line 18, and a diagonal axis line 19. Then, as shown in FIG. 9A, when a deflection magnetic field is applied to the electron beam 13 emitted from the electron guns 12 arranged in a horizontal row, and the electron beam 13 is deflected by the deflection magnetic field, a horizontal axis line of the screen 14 is displayed. A static convergence error occurs in which the blue color 16 of the electron beam 13 is located on the right side of the red color 15 on the vertical axis 17 and on the vertical axis 18 and the diagonal axis 19 respectively.

To correct this static convergence error, the horizontal deflection magnetic field and the vertical deflection magnetic field are adjusted to adjust the dynamic convergence by the deflection magnetic field. That is, the deflection magnetic field is corrected so that the red 15 and the blue 16 of the electron beam 13 coincide with each other so as to eliminate the static convergence error on the horizontal axis 17 of the screen 14, the vertical axis 18 and the diagonal axis 19. Is to do. When the deflection current is adjusted to correct the generation of the deflection magnetic field, the red 15 and the blue 16 can match on the horizontal axis 17 and the vertical axis 18, but the diagonal axis 19 as shown in FIG. 9B. Above, blue 16 comes to the left of red 15. A state in which the blue color 16 is located on the left side of the red color 15 on the diagonal axis 19 is generally called an overcorrection state.

In order to eliminate the overcorrection state of the diagonal axis 19, in the conventional deflection yoke, as shown in FIG. 6, a screen pair passing through the winding frame 1 corresponding to the diagonal axis 19 of the screen 14 is displayed. On the horizontal deflection coil 3 and the trapezoidal portion 4 where the square axis 20 intersects with the pedestal side edge portion 5, a disk-shaped or square-shaped magnetic piece 9 in which ferrite powder is filled with rubber or the like is arranged. The magnetic piece 9 is attached and fixed with an adhesive tape 10 or the like. When the magnetic piece 9 is thus arranged at the position where the screen diagonal axis 20 and the base side edge portion 5 intersect, the magnetic piece 9 is magnetized by the deflection magnetic field applied to the horizontal deflection coil 3 and the electron beam 13 is emitted. The deflecting magnetic field of the diagonal axis 19 for deflecting is suppressed. Then, the overcorrection state in which the blue 16 of the electron beam 13 is located on the left side of the red 15 on the diagonal axis 19 shown in FIG. 9B is corrected, and the red of the electron beam 13 on the diagonal axis 19 is corrected. 15 and blue 16 coincide with each other, and the color shift of convergence is eliminated.

The position where the screen diagonal axis 20 intersects with the pedestal side edge portion 5 is set to the substantially center position of the magnetic piece 9 because a large number of magnetic pieces 9 are arranged on the horizontal deflection coil 3. The deflection magnetic field for deflecting the electron beam 13 is excessively suppressed so that the blue color 16 is located on the right side of the red color 15 on the diagonal axis 19. When only a small amount of the magnetic piece 9 is arranged on the horizontal deflection coil 3, the overcorrection state is slightly corrected, but the deflection magnetic field is not sufficiently suppressed, and blue 16 is red 15 on the diagonal axis 19. It is located on the left side of.

[0009]

In the conventional deflection yoke as described above, the magnetic piece 9 is attached to the trapezoidal portion 4 on the inner peripheral surface of the winding frame 1 and the horizontal deflection coil 3, but the magnetic piece 9 is attached. Has a certain size, and moreover, there is not a flat surface but a step between the horizontal deflection coil 3 and the trapezoidal portion 4 to be stuck, and therefore the adhesive surface of the adhesive tape 10 to which the magnetic piece 9 is stuck is Since the magnetic piece 9 is attached to an uneven surface instead of a flat surface, the adhesive force is weak. After the attachment, the magnetic piece 9 is displaced from a predetermined position, or the magnetic piece 9 comes off to cause a convergence error. There is a problem that the quality of the screen 14 is degraded.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a deflection yoke in which a magnetic piece on a diagonal axis of a screen is securely fixed and a convergence error is eliminated.

[0011]

In order to achieve this object, a deflection yoke according to the present invention comprises a pair of funnel-shaped cores, vertical deflection coils provided inside each of the cores, and inside the vertical deflection coils. It has a winding frame provided on the inner side of the winding frame and a horizontal deflection coil in which the wire is wound along the wire guide wall provided on the inner peripheral surface of the winding frame. A notch portion is provided at a position where the axis line and an edge portion of the electric wire guide wall on the base side intersect, and a magnetic piece is arranged at the notch portion.

The deflection yoke of the present invention includes a pair of funnel-shaped cores, vertical deflection coils provided inside each of the cores, a winding frame provided inside the vertical deflection coils, and a winding. It is equipped with a horizontal deflection coil that winds an electric wire along the electric wire guide wall provided on the inner peripheral surface of the frame.On the inner peripheral surface, the screen diagonal axis passing through the winding frame and the pedestal side edge of the electric wire guide wall are provided. The recesses are provided at the intersecting positions, and the magnetic pieces are housed in the recesses.

[0013]

In the deflection yoke of the present invention, the inner peripheral surface is provided with a notch at a position where the screen diagonal axis passing through the winding frame and the base side edge of the wire guide wall intersect, and the notch is magnetic. Since the magnetic piece is provided, the magnetic piece can be covered with the electric wire, and the magnetic piece can be reliably fixed.

Further, in the deflection yoke of the present invention, a concave portion is provided on the inner peripheral surface at a position where the screen diagonal axis passing through the winding frame and the base side edge portion of the wire guide wall intersect, and the magnetic piece is stored in the concave portion. With this configuration, the magnetic piece can be easily and surely fixed at the correct position.

[0015]

【Example】

(Embodiment 1) A deflection yoke according to a first embodiment of the present invention will be described below with reference to the drawings. 1 is a front view of a deflection yoke according to a first embodiment of the present invention, FIG. 2 is a front view of a winding frame of a horizontal deflection coil of the deflection yoke according to the first embodiment of the present invention, FIG. FIG. 3B is a sectional view for explaining the winding process of the horizontal deflection coil of the deflection yoke in the first embodiment of the present invention. Figure 1, Figure 2, Figure 3
In FIGS. 3A and 3B, the same reference numerals as those in the conventional example are basically the same. 1, FIG. 2, FIG. 3 (a) and FIG. 3 (b), 1 is a winding frame around which a coil for horizontal deflection is wound, 2 is a wire guide wall, 3 is a horizontal deflection coil, and 4 is a trapezoid. Reference numeral 5 denotes a base-side edge portion, 9 denotes a magnetic piece, 20 denotes a screen diagonal axis line, 21 denotes a cutout portion provided at the base-side edge portion 5, and 22 denotes an electric wire that radially forms the horizontal deflection coil 3. . In the first embodiment of the present invention, the core, vertical deflection coil and the like used in the conventional example will not be described.

The winding of the horizontal deflection coil 4 of the first embodiment thus constructed will be described. First, as shown in FIG. 2 and FIG. 3A, the screen diagonal axis 2 passing through the winding frame 1
A cutout portion 21 is provided in the trapezoidal portion 4 at a position where 0 and the pedestal side edge portion 5 of the electric wire guide wall 2 intersect. Adhesive is attached to one surface of the disk-shaped or square-shaped magnetic piece 9, and the surface of the magnetic piece 9 to which the adhesive is attached is cut out 2 of the trapezoidal portion 4.
Paste and adhere to 1. It should be noted that although the glue was attached to the surface of the magnetic piece 9 in advance, the glue on the surface of the magnetic piece 9 was removed and adhesive was applied in advance to the notch 21 of the trapezoidal portion 4, and then the magnetic piece 9 was attached. You may. Next, as shown in FIGS. 1 and 3B, the electric wire 22 is wound along the electric wire guide wall 2 on the magnetic piece 9 attached to the cutout portion 21 of the trapezoidal portion 4, and the horizontal deflection coil 3 is formed. Can be formed.

As described above, in the first embodiment, since the electric wire 22 is wound so as to directly cover and press the magnetic piece 9, the horizontal deflection coil 3 is formed.
Alternatively, the detachment of the magnetic piece 9 is eliminated, and the quality is improved without the color shift of the convergence of the screen.

(Second Embodiment) A deflection yoke according to a second embodiment of the present invention will be described below with reference to the drawings. 4 (a) and 4 (b) are sectional views for explaining the winding process of the horizontal deflection coil of the deflection yoke in the second embodiment of the present invention. 4 (a) and 4 (b), those having the same reference numerals as those in the first embodiment are basically the same, and thus detailed description thereof will be omitted. In FIGS. 4A and 4B, 1
Is a winding frame around which a coil for horizontal deflection is wound, 2 is a wire guide wall, 3 is a horizontal deflection coil, 4 is a trapezoidal portion, 5 is a side edge of the platform, 9 is a magnetic piece, 22 is a horizontal deflection coil 3 Wire, 23
Is a magnetic piece 9 provided at a position where a screen diagonal axis (not shown) passing through the winding frame 1 and the stand side edge 5 of the wire guide wall 2 intersect.
Is a recess for accommodating. In the second embodiment of the present invention, the core, vertical deflection coil and the like used in the conventional example will not be described.

The winding of the horizontal deflection coil 3 of the second embodiment thus constructed will be described. First, FIG.
As shown in FIG. 3, a recess 23 for housing the magnetic piece 9 is provided at a position where the screen diagonal axis passing through the winding frame 1 and the stand side edge 5 of the wire guide wall 2 intersect. Then, the magnetic piece 9 accommodated in the recess 23 has glue adhered to one surface of the disk-shaped or square-shaped magnetic piece 9, and the recess 23 has the glue-attached surface of the magnetic piece 9. Paste and glue. When the magnetic piece 9 is attached and stored in the recess 23 in this manner, the magnetic piece 9 can be easily fixed at an accurate position where the screen diagonal axis (not shown) and the base side edge 5 intersect. Although the glue is attached to the surface of the magnetic piece 9 in advance, the glue on the surface of the magnetic piece 9 may be removed and an adhesive may be applied to the recess 23 in advance, and then the magnetic piece 9 may be attached.

Next, as shown in FIG. 4B, the magnetic piece 9
Does not protrude from the winding surface of the electric wire guide wall 2, so that the horizontal deflection coil 3 can be easily formed by winding the magnetic piece 9 along the electric wire guide wall 2 so that the electric wire 22 covers the magnetic piece 9.

As described above, in the second embodiment, since the magnetic piece 9 housed in the recess 23 is wound around the electric wire 22 to form the horizontal deflection coil 3, the magnetic piece 9 is displaced.
Alternatively, the detachment of the magnetic piece 9 is eliminated, and the quality is improved without the color shift of the convergence of the screen.

[0022]

As described above, in the deflection yoke of the present invention,
On the inner peripheral surface, a notch is provided at the position where the screen diagonal axis passing through the winding frame and the stand side edge of the wire guide wall intersect, and the magnetic piece is arranged at the notch, so the magnetic piece is The wound electric wire is covered and securely fixed, and the displacement of the magnetic piece or the detachment of the magnetic piece is eliminated, so that the convergence error can be eliminated.

Further, in the deflection yoke of the present invention, the inner peripheral surface is provided with a concave portion at a position where the screen diagonal axis passing through the winding frame and the base side edge portion of the wire guide wall intersect, and the magnetic piece is stored in the concave portion. Therefore, the magnetic piece can be easily fixed at an accurate position, the positional deviation of the magnetic piece or the detachment of the magnetic piece can be eliminated, and the convergence error can be eliminated.

[Brief description of drawings]

FIG. 1 is a front view of a deflection yoke according to a first embodiment of the present invention.

FIG. 2 is a front view of a winding frame of the horizontal deflection coil of the deflection yoke according to the first embodiment of the present invention.

FIG. 3A is a cross-sectional view illustrating a winding process of the horizontal deflection coil of the deflection yoke according to the first embodiment of the present invention. FIG. 3B is a horizontal deflection coil of the deflection yoke according to the first embodiment of the present invention. Sectional drawing explaining winding process

FIG. 4A is a cross-sectional view illustrating a winding process of a horizontal deflection coil of a deflection yoke according to a second embodiment of the present invention. FIG. 4B is a horizontal deflection coil of a deflection yoke according to a second embodiment of the present invention. Sectional drawing explaining winding process

FIG. 5 is a side sectional view of a conventional deflection yoke.

FIG. 6 is a front view of a conventional deflection yoke.

FIG. 7 is a perspective view in which a conventional deflection yoke is attached to a cathode ray tube.

FIG. 8 is a view showing a screen of a cathode ray tube in which a conventional deflection yoke deflects an electron beam.

FIG. 9A is a schematic view of a screen in which a deflection magnetic field is applied and deflected in a conventional deflection yoke, and FIG. 9B is a schematic view of a screen in which dynamic convergence is adjusted by the deflection magnetic field in the conventional deflection yoke.

[Explanation of symbols]

 1 Winding frame 2 Electric wire guide wall 3 Horizontal deflection coil 4 Unit-shaped part 5 Unit side edge 9 Magnetic piece 20 Screen diagonal axis 21 Notch 22 Electric wire 23 Recess

Claims (2)

[Claims] 1. A pair of funnel-shaped cores, a vertical deflection coil provided inside each of the cores, a winding frame provided inside the vertical deflection coil, and an inner circumference of the winding frame. A horizontal deflection coil in which an electric wire is wound along an electric wire guide wall provided on a surface is provided, and a diagonal line of the screen passing through the winding frame and an edge line of the electric wire guide wall stand intersect with each other on the inner peripheral surface. A deflection yoke, wherein a notch is provided at a position, and a magnetic piece is provided at the notch. 2. A pair of funnel-shaped cores, a vertical deflection coil provided inside each of the cores, a winding frame provided inside the vertical deflection coil, and an inner circumference of the winding frame. A horizontal deflection coil in which an electric wire is wound along an electric wire guide wall provided on a surface is provided, and a diagonal line of the screen passing through the winding frame and an edge line of the electric wire guide wall stand intersect with each other on the inner peripheral surface. A deflection yoke, wherein a concave portion is provided at a position and a magnetic piece is housed in the concave portion.