JPH0787506A - Method for forming picture rotation correcting coil, deflecting yoke with this coil, and monitor - Google Patents

Abstract

PURPOSE:To reduce the cost by easily forming a picture rotation correcting coil and simplifying the mold shape of a coil cover or the like. CONSTITUTION:Two annular coil winding jigs 40 are arranged in a coil winding part 35 of a coil cover 3 with a proper width B between them. Each coil winding jig 40 is divided into two by the center part. A self-weldable conductor 11 like an alcohol welding wire is wound between coil winding jigs 40 by a prescribed turns, and coil winding jigs 40 are removed after the weld part of the conductor 11 is hardened. In this forming method, a picture rotation correcting coil 10 is easily formed in one process and a conventional coil winding frame or the like is unnecessary, and therefore, the mold shape of the coil cover 3 is simplified to reduce the cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image rotation correction coil which is easy to form, a deflection yoke and a monitor to which the same is applied.

[0002]

2. Description of the Related Art As is well known, an electron beam emitted from an electron gun of a CRT (cathode ray tube) incorporated in a monitor or the like changes its direction when it is affected by a magnetic field. For example, as shown in FIG. 8, when manufacturing the monitor 5,
Even if the monitor 11 is adjusted so that the normal image A is displayed on the panel 11 of the internal CRT 1, if the monitor 5 is used as it is in an area where the latitude is greatly different from the place of manufacture, that is, a region where the geomagnetism is greatly different from the place of manufacture. The image A becomes an image B that is rotated and tilted in either direction.

As described above, the CRT 1 of the monitor 5 used in an area where the geomagnetism is greatly different from the place of manufacture is provided with the image rotation correction coil 10 as shown in FIGS. 9 and 10.
By canceling the magnetic field due to the terrestrial magnetism with the magnetic field generated by the image rotation correction coil 10, the rotated image B
Is normally corrected to the normal image A.

FIG. 9A shows a case where a coil cover 3 is attached to the front end portion of a deflection yoke 2 used in a CRT 1 and an image rotation correction coil 10 as shown by the hatched portion is wound around the coil cover 3. . In this case, as shown in FIG. 3B, two flange-shaped coil winding frames 31 are provided on the outer peripheral surface of the coil cover 3 at appropriate intervals, and the conducting wire 11 is wound by a predetermined number of windings between them. The rotation correction coil 10 is formed. Both ends of the image rotation correction coil 10 have coil winding frames 31.
Is connected to two pin terminals 32 provided on the side surface of the device, to which a predetermined current is supplied from control means (not shown) that controls the direction and magnitude of the current. As a result, a magnetic field is generated in the image rotation correction coil 10.

FIG. 10 shows a case where a plurality of coil attachment portions 21 are provided by folding back the tip of an elongated projecting piece provided at the front end portion of the deflection yoke 2, and the image rotation correction coil 10 is attached thereto. ing. In this case, the air-core image rotation correction coil 10 is separately formed and attached to the coil attachment portion 21. Again, both ends of the image rotation correction coil 10 are connected to the pin terminals 32 (not shown),
Electric current is supplied from here.

[0006]

By the way, the coil cover 3 as shown in FIG. 9 is provided with two flange-shaped coil winding frames 31 at appropriate intervals, and the conducting wire 11 is wound between the coil winding frames 31 to form the image rotation correction coil. In the method of forming 10, the coil cover 3 must be provided with a special coil winding frame 31, so that the mold for molding the coil cover 3 becomes complicated and the cost increases.

On the other hand, in the method of separately forming the air-core image rotation correction coil 10 as shown in FIG. 10 and attaching it to the coil attachment portion 21 of the deflection yoke 2, the step of forming the image rotation correction coil 10 and the deflection This requires a two-step process of attaching to the yoke 2, which also causes an increase in cost. Further, in this case, the outer diameter of the deflection yoke 2 is increased by the amount of the coil mounting portion 21, and there is a problem that the utilization efficiency of the space in the cabinet in, for example, a TV receiver or monitor to which the deflection yoke 2 is applied deteriorates. .

Therefore, the present invention has been made to solve the above-mentioned problems, and it is possible to easily form the image rotation correction coil to reduce the cost and to make the deflection yoke small. This invention proposes a method for forming a new image rotation correction coil, and a deflection yoke and a monitor having this image rotation correction coil.

[0009]

In order to solve the above-mentioned problems, in the invention described in claim 1, the electron beam emitted from the electron gun of the CRT is affected by an external magnetic field, and C
In order to correct the rotation of the image displayed on the RT panel, in the method of forming the image rotation correction coil provided at the front end of the deflection yoke, a flat outer peripheral surface of the coil cover attached to the front end of the deflection yoke is formed. Set the coil winding range for winding the image rotation correction coil, and place coil winding jigs on both sides of the coil winding range to wind the image rotation correction coil within the coil winding range. The invention is characterized in that a predetermined number of conductive wires are wound inside the winding jig, and then the coil winding jig is removed to form the image rotation correction coil.

According to the invention of claim 2, a CRT is provided.
In the deflection yoke having an image rotation correction coil for correcting the rotation of the image projected on the CRT panel due to the influence of the external magnetic field of the electron beam emitted from the electron gun of The image rotation correction coil is wound around the flat outer peripheral surface of the attached coil cover, and the image rotation correction coil is connected to the current control means. Therefore, the image rotation correction coil is connected to the two pin terminals connected to the control means. It is characterized in that both ends are connected.

According to the invention of claim 3, a CRT is provided.
In a monitor having a deflection yoke around which an image rotation correction coil for correcting the rotation of the image projected on the CRT panel due to the influence of the external magnetic field on the electron beam emitted from the electron gun of The image rotation correction coil is wound around a flat outer peripheral surface of a coil cover attached to the front end of the deflection yoke, and both ends of the image rotation correction coil are connected to a current control means. is there.

[0012]

As shown in FIG. 2, a flat coil winding portion 35 is provided on the coil cover 3 attached to the tip of the deflection yoke 2, and the coil cover 3 is provided on the flat outer peripheral surface of the coil winding portion 35. A coil winding range B is set apart from the front end of the coil by a predetermined dimension A. The conductor 11 is wound in a predetermined number within the coil winding range B to form the image rotation correction coil 10.

As shown in FIG. 3, the coil winding portion 35 is provided with a retaining projection 36 having an appropriate length L so as to be positioned at the center of the image rotation correction coil 10, thereby allowing the image rotation. The correction coil 10 is prevented from coming off. Further, the coil winding portion 35 is formed in an elliptical shape as shown in FIG.
Is prevented from rotating in the winding direction.

When forming the image rotation correction coil 10, first, as shown in FIG. 5, the collar-shaped coil winding jigs 40 are arranged on both sides of the coil winding range B. Next, as shown in FIG. 6, for example, a conductor wire 11 such as an alcohol fusion wire is wound around the coil winding jig 40 by a predetermined number of times and is fused.
Then, as shown in FIG. 7, after the fused portion of the conductive wire 11 is cured, the outer winding correction coil 10 is formed by removing the coil winding jig 40.

[0015]

Embodiments of the method of forming an image rotation correction coil, a deflection yoke having an image rotation correction coil, and a monitor according to the present invention will be described in detail with reference to the drawings. The same components as those described above are designated by the same reference numerals and detailed description thereof is omitted.

FIG. 1 shows an image rotation correction coil 10 according to the present invention.
The structure of the deflection yoke 2 to which is applied is shown. The deflection yoke 2 is a monitor 5 (FIG. 8) used particularly in an area where the latitude is significantly different from that of the manufacturing place, that is, an area where geomagnetism is different.
Incorporated into CRT1 of. Now, as shown in Figure 1,
A coil cover 3 is attached to the tip of the deflection yoke 2, and an image rotation correction coil 10 is wound around the coil cover 3.

As shown in FIG. 2, the coil cover 3 has a cylindrical Y-shaped cross section and a cylindrical deflection yoke insertion portion 33.
A brim-shaped vertical side portion 34 is provided upright. A ring-shaped coil winding portion 35 that projects rearward of the deflection yoke 2 is provided at the tip of the vertical side portion 34. Coil winding portion 35
Has a flat outer peripheral surface, and a coil winding range B having a predetermined width is provided at a position separated from the front end of the coil cover 3 by a predetermined dimension A. A self-fusing conductor wire 11 such as an alcohol fusion wire is wound here by a predetermined number of turns, and then each conductor wire 11 is fused to form an image rotation correction coil 10.

Further, in the central portion of the coil winding range B, for example, as shown in FIG. 3 (A), the retaining projection 36 is provided with a height C which is the same as or slightly smaller than the radius of the conductor wire 11, for example. Is provided. This retaining projection 36
In order to prevent the conducting wires 11 wound on both sides thereof from being separated from each other, the contact surface of the conducting wire 11 has an arc shape. In this way, since the retaining projections 36 are arranged between the conducting wires 11 that are in contact with each other, the image rotation correction coil 1
It is prevented that 0 slips on the coil winding portion 35 and falls out.

As shown in FIG. 3B, the retaining projections 36 have an appropriate length L of, for example, about 30 mm and are intermittently provided in plural numbers around the entire circumference of the coil winding portion 35. . Therefore, for example, by winding the conducting wire 11 wound on the left side of the retaining protrusion 36 on the right side of the retaining protrusion 36 through this space, the conducting wire 11 rides on the retaining protrusion 36 and is cut. It will be possible to prevent it.

Now, as shown in FIG. 4, the coil winding portion 35 of the above-mentioned coil cover 3 has a radius R1 separated by an interval D.
It is shaped like an ellipse having semicircles on both sides. Also,
The deflection yoke insertion portion 33 is formed into a substantially perfect circle with a radius R2. By thus forming the coil winding portion 35 in an oval shape, it becomes possible to easily prevent the image rotation correction coil 10 from rotating in the winding direction.

The deflection yoke 2 to which the image rotation correction coil 10 is applied does not require a special coil mounting portion 21 for mounting the image rotation correction coil 10 as shown in FIG. It can be made smaller.
Further, since no special means for preventing the rotation of the image rotation correction coil 10 is required, the structure of the coil cover 3 is simplified.

Next, a method of forming the image rotation correction coil 10 will be described with reference to FIGS. When the image rotation correction coil 10 is formed, first, as shown in FIG. 5A, on the outer peripheral surface of the flat coil winding portion 35 of the coil cover 3, the dimension A is separated from the front end edge of the coil cover 3. The coil winding range B is set at the position, and the collar-shaped coil winding jig 40 is arranged on both sides thereof. Height E of the coil winding jig 40
Is larger than the height F of the image rotation correction coil 10 in order to make it easier to wind the conducting wire 11.

Further, as shown in FIG. 3B, the coil winding jig 40 is formed into an elliptical shape whose inner peripheral side is substantially the same as the outer peripheral side of the coil winding portion 35. Further, the coil winding jig 40 is divided into two parts from the center, whereby the collar portion 3 as shown by a chain double-dashed line in FIG.
Even when 7 is in the vicinity of the coil winding range B, the coil winding jig 40 can be easily removed after the image rotation correction coil 10 is formed.

After arranging the coil winding jigs 40 on both sides of the coil winding range B in this manner, as shown in FIG. 6, a self-welding conductor 11 such as an alcohol welding wire is provided.
After being wound a predetermined number of times in order from the end using the coil winding jig 40 as a guide, this is fused. Then, after the fusion-bonded portion of each conductor wire 11 is cured, each piece of the coil winding jig 40 divided into two as shown in FIG.
Remove it by pulling it in the radial direction. As a result, the image rotation correction coil 10 is formed at a predetermined position, that is, at a position of the dimension A from the front end portion of the coil cover 3 with a predetermined dimension, that is, a horizontal width B × height F. Both ends of the image rotation correction coil 10 are connected to the pin terminals 32 (FIG. 1).

After the image rotation correction coil 10 is wound around the coil cover 3 in this manner, the coil cover 3 is attached to the deflection yoke 2. The deflection yoke 2 is C
It is incorporated into RT1 (FIG. 8). In this case, pin terminal 3
A control means (not shown) for controlling the direction and magnitude of the electric current is connected to 2. This makes it possible to properly adjust the direction and magnitude of the magnetic field generated in the image rotation correction coil 10.

By incorporating the CRT 1 having the deflection yoke 2 around which the image rotation correction coil 10 is wound into the monitor 5, a rotated image B is generated on the panel 11 when the CRT 1 is used in an area where the geomagnetism is greatly different from the manufacturing site. Even in this case, it is possible to correct this to the normal image A.

In the above-described embodiment, the case where one long conductive wire 11 is wound by a predetermined number of turns to form the image rotation correction coil 10 has been described, but a plurality of conductive wires 11 are formed in a band shape in advance. Rotation correction coil 1
It is also possible to form 0.

[0028]

As described above, according to the present invention, the coil cover is attached to the deflection yoke of the CRT incorporated in the monitor, and the wire is wound on the flat outer peripheral surface of the CRT to form the image rotation correction coil. .

Therefore, according to the present invention, it is not necessary to provide the deflection yoke with the coil winding frame as in the conventional case.
The shape of the mold for molding this becomes simple, which enables cost reduction. Further, since the image rotation correction coil can be formed in one step, it is more work than the conventional case where two steps of forming an air-core image rotation correction coil and attaching it to the deflection yoke are required. It is possible to reduce man-hours.

Further, since it is not necessary to specially provide a coil mounting portion or the like on the outer peripheral side of the deflection yoke as in the conventional case, the deflection yoke can be miniaturized, thereby improving the utilization efficiency of the space in the monitor. There are effects such as improvement.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a deflection yoke 2 to which an image rotation correction coil 10 according to the present invention is applied.

FIG. 2 is a cross-sectional view illustrating a winding portion of the image rotation correction coil 10.

FIG. 3 is a diagram for explaining a retaining projection 36 of the image rotation correction coil 10.

FIG. 4 is a diagram illustrating the shape of a coil winding portion 35.

FIG. 5 is a diagram illustrating a forming procedure (1/3) of the image rotation correction coil 10.

FIG. 6 is a diagram illustrating a forming procedure (2/3) of the image rotation correction coil 10.

FIG. 7 is a diagram illustrating a procedure (3/3) of forming the image rotation correction coil 10.

FIG. 8 is a diagram illustrating rotation of an image due to a change in magnetic field.

FIG. 9 is a diagram illustrating a first example of a conventional image rotation correction coil 10.

FIG. 10 is a diagram illustrating a second example of a conventional image rotation correction coil 10.

[Explanation of symbols]

 1 CRT 2 Deflection Yoke 3 Coil Cover 5 Monitor 10 Image Rotation Correction Coil 11 Conductor 31 Coil Winding Frame 32 Pin Terminal 33 Deflection Yoke Insertion Section 35 Coil Winding Section 36 Detent Protrusion 40 Coil Winding Jig B B Coil Winding Range

Claims (3)

[Claims] 1. An image provided on a front end portion of a deflection yoke for correcting rotation of an image displayed on a panel of the CRT due to an external magnetic field affecting an electron beam emitted from an electron gun of the CRT. In the method for forming the rotation correction coil, a coil winding range for winding the image rotation correction coil is set on the flat outer peripheral surface of the coil cover attached to the front end of the deflection yoke, and the coil winding range is set within the coil winding range. In order to wind the image rotation correction coil, coil winding jigs are arranged on both sides of the coil winding range, and a predetermined number of conducting wires are wound inside the coil winding jig. A method for forming an image rotation correction coil, characterized in that the rotation jig is removed to form the image rotation correction coil. 2. A deflection yoke having an image rotation correction coil for correcting rotation of an image displayed on a panel of the CRT when an electron beam emitted from an electron gun of the CRT is affected by an external magnetic field. The image rotation correction coil is wound around a flat outer peripheral surface of a coil cover attached to the front end of the deflection yoke, and the image rotation correction coil is connected to the control means for connecting to the current control means. A deflection yoke in which both ends of the image rotation correction coil are connected to two pin terminals. 3. An image rotation correction coil for correcting rotation of an image displayed on the panel of the CRT when an electron beam emitted from an electron gun of the CRT is affected by an external magnetic field and is wound. In a monitor having a deflection yoke, the image rotation correction coil is wound around a flat outer peripheral surface of a coil cover attached to a front end portion of the deflection yoke, and both ends of the image rotation correction coil are connected to a current control means. A monitor that is characterized by being.