KR20040057586A - Metal piece of deflection yoke for cathod ray tube - Google Patents

Abstract

PURPOSE: A deflection yoke correcting iron piece is provided to prevent a movement of the correcting iron piece and achieve improved work efficiency by eliminating the necessity of using an adhesive. CONSTITUTION: A deflection yoke correcting iron piece(16) is slide inserted into a fixing member(14) mounted on a neck portion(13) of a deflection yoke(100). The deflection yoke correcting iron piece has a teeth portion(16a) formed at one of surfaces contacting the fixing member. The fixing member has two guides formed integrally with the neck portion and spaced apart from each other. Each of the guides has a guide surface with a teeth portion(15) corresponding to the teeth portion of the deflection yoke correcting iron piece. The teeth portion of the deflection yoke correcting iron piece is engaged with the teeth portion of the guide.

Description

Deflection yoke correction iron for cathode ray tube {METAL PIECE OF DEFLECTION YOKE FOR CATHOD RAY TUBE}

The present invention relates to a deflection yoke correction iron piece for a cathode ray tube, and more particularly, to a correction iron piece for improving misconvergence caused by imbalance of magnetic field characteristics in a deflection yoke installed in a cathode ray tube to deflect an electron beam.

In general, the deflection yoke used in the cathode ray tube of a TV receiver or a monitor is mounted on the neck portion of the cathode ray tube to emit 3 beams of R beam (red beam), G beam (green beam), and B beam (blue beam). By deflecting the color electron beam using a magnetic field, the electron beam passes through the through holes formed in the shadow mask to accurately reach the fluorescent surface of the screen.

More specifically, since the electron beam emitted from the electron gun has a straightness, in the absence of a separate deflection means for deflecting the electron beam, it is impossible to implement an image on the entire screen, especially the edge of the screen, by concentrating on the center of the fluorescent surface. Therefore, the deflection yoke forms a magnetic field that changes the trajectory of the electron beam, and serves to accurately reach the entire fluorescent surface, including the edge of the fluorescent surface.

The deflection yoke includes a horizontal deflection coil for generating a horizontal deflection magnetic field for deflecting the electron beam in the horizontal direction, a vertical deflection coil for generating a vertical deflection magnetic field for deflecting the electron beam in the vertical direction, and the horizontal deflection coil and the vertical deflection coil. It includes a coil separator for separating the positions and electrically insulating the two. The coil separator has an approximately fallopian tube shape, a horizontal deflection coil is mounted on the inner circumferential surface of the coil separator, and a vertical deflection coil is mounted on the outer circumferential surface of the coil separator.

However, even when the deflection yoke configured as described above is installed in the cathode ray tube, the deflection of the electron beam is poor due to various causes such as the winding dispersion of the deflection coil or the imbalance of the magnetic field characteristics. / D (Gemetric Distortion) phenomenon occurs.

Examples of such miss convergence include Yv miss convergence of B beams and R beams caused by mismatching B beams and R beams on the upper and lower sides of the screen, and G beam tilts that appear in a parallelogram with the screen tilted left and right. have.

In order to correct this misconvergence, a person skilled in the art employs a ferrite sheet and / or a permalloy correction iron bar, and the ferrite sheet is mainly used to correct Yv misconvergence of the R beam and the B beam, and the correction iron pieces are R beam and B beam. It is used not only for the Yv miss convergence correction of the beam, but also for the correction of the G-beam tilt.

The ferrite sheet is a sheet coated with an adhesive on one surface, and when Yv miss convergence of the R beam and the B beam occurs, the ferrite sheet is attached to the horizontal deflection core to change the horizontal deflection magnetic field of the deflection yoke to cause the Yv miss of the R beam and the B beam. The convergence is corrected.

On the other hand, the correction iron piece is typically a thin flat rectangular iron piece made of permalloy material, at least one or more correction iron pieces are arranged in various combinations on the upper surface of the neck portion of the deflection yoke so as to correspond to the miss convergence to be corrected R beam and B Not only the Yv miss convergence of the beam, but also the G-beam tilt can be corrected.

At this time, the correction iron piece is directly attached to the upper surface of the neck portion of the deflection yoke with an adhesive or the like, or mechanically inserted and fixed by a separate fixing means provided on the upper surface of the neck portion.

An example of a correction iron piece mechanically inserted and fixed is disclosed in Korean Patent Laid-Open Publication No. 2002-18409 published on March 8, 2002 under the name of “correction iron insertion structure of deflection yoke”.

1 is a view for explaining a correction iron piece and a deflection yoke according to the prior art, it is a view showing the insertion fixing structure of the correction iron piece disclosed in the Republic of Korea Patent Publication No. 2002-18409.

Referring to FIG. 1, a conventional deflection yoke 10 is mounted on a coil tube 1 having a substantially fallopian tube shape, a vertical deflection coil 2 mounted on an outer circumferential surface of the coil separator 1, and an inner circumferential surface of the coil separator. It includes a horizontal deflection coil (not shown).

In addition, a bridge-shaped fixing piece 4 is integrally formed on an upper surface of the neck portion 3 of the coil separator 1, and a plurality of fixings are integrally formed with the upper surface of the neck portion 3 under the fixing piece 4. The projection 5 is formed.

As described above, a rectangular correction iron piece 6 made of a permalloy material capable of partially changing the magnetic field of the deflection yoke is inserted into the fixing piece 4. When the correction iron piece 6 is inserted, the bottom surface of the correction iron piece 6 is pressed upward by the fixing protrusion 5, and the upper surface of the correction iron piece 6 is pressed downward by the bottom surface of the fixing piece 4.

As shown, two fixing pieces 4 are formed to face each other at the upper edge of the neck portion 3, and the width of each fixing piece 4 can be inserted and fixed at the same time two correction iron pieces (6) It is enough.

The insertion position of the correction iron piece is determined to be a specific position where the deflection yoke is mounted on the cathode ray tube and the miss convergence on the screen displayed by the beam emitted from the electron gun can be corrected.

In other words, in order to correct misconvergence on the screen, which varies depending on the cathode ray tube, the correction iron piece must be properly disposed at a position corresponding to the miss convergence. Of course, the corrected iron piece cannot completely compensate for all types of miss convergences occurring in the cathode ray tube, but it has been found to be particularly useful as a means for simultaneously correcting Yv miss convergence and G beam tilt.

However, correction iron pieces known in the art, including the prior art described above is easy to manufacture because the shape is simple as a rectangle, but there are various problems.

For example, when the worker directly attaches the correction iron piece to the upper surface of the neck portion by using an adhesive, there is no structure that serves as a standard, and thus, there is a problem in that scattering occurs by attaching to the worker at different positions. In addition, the degree of correction of miss convergence may vary greatly according to the skill of the operator, and in the case of a beginner, there is a problem in that productivity and yield are generally reduced by mass producing a plurality of defective products. In addition, the use of the adhesive may worsen the working environment may cause health problems.

In addition, in the case of inserting and fixing the corrected iron piece by adopting the structure disclosed in the above-described patent, since the bonding process using the adhesive can be omitted, the scattering according to the operator can be suppressed to the minimum, and formed on the upper surface of the neck portion. The fixing iron piece is pressed upward by the fixing projections and pressed downward by the bottom of the fixing piece, thereby ensuring the fixing force in the vertical direction. However, since one of the side edges of the correction iron piece is not always supported at any insertion position, it is displaced laterally by vibration or the like to form an unbalanced magnetic field. Therefore, the operator should pay special attention so as not to cause vibration when inserting and fixing the correction iron to the fixing piece, there is a problem that the work time due to the fixing takes a lot of productivity is lowered.

Accordingly, an object of the present invention is to provide a deflection yoke correction iron piece for a cathode ray tube in which no flow occurs when fixed to a deflection yoke.

Another object of the present invention is to provide a deflection yoke correction iron piece for a cathode ray tube having a structure that can be set with a certain correction criteria in order to minimize the occurrence of scattering according to the operator.

Still another object of the present invention is to provide a deflection yoke correction iron piece for a cathode ray tube that can be fixed without a bonding process using an adhesive.

In order to achieve the above object, the present invention provides a cathode yoke deflection yoke correction iron piece for partially changing the magnetic field of the deflection yoke for the cathode ray tube to correct the miss convergence on the screen, the fixing member formed on the neck portion of the deflection yoke It is inserted and fixed in a slide type, provides a deflection yoke correction iron piece for a cathode ray tube, characterized in that the teeth formed on at least one surface of the contact surface in contact with the fixing member.

As another feature of the invention, the fixing member is formed integrally with the neck portion and includes two guides spaced in parallel at a predetermined interval, the guide surface of the guide teeth of the shape corresponding to the teeth of the correction iron piece And a tooth portion of the correction iron piece is engaged with and fixed to the tooth portion of the guide.

As another feature of the invention, the correction iron piece is a flat plate.

1 is a schematic diagram showing a correction iron piece and a deflection yoke according to the prior art,

2 is a schematic diagram showing a correction iron piece and a deflection yoke according to the present invention,

3 is a partial detailed view showing the main part of FIG.

4 is a diagram illustrating Yv miss convergence of B beams and R beams;

FIG. 5 is a view schematically showing a correction iron insertion position for correcting the Yv miss convergence shown in FIG. 4;

6 is a diagram illustrating a G-beam tilt,

FIG. 7 is a view schematically showing a correction iron insertion position for correcting the G-beam tilt shown in FIG. 6;

8 is a view showing a modification of the correction iron piece according to the present invention.

※ Explanation of code about main part of drawing ※

11: coil separator 12: vertical deflection coil

13: neck 14: fixing member

14a, 14b: guide 15, 16a: tooth part

16, 17: Correction bar 17a: handle

100: deflection yoke

EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, the structure of the deflection yoke correction iron piece for cathode ray tubes which concerns on this invention is demonstrated in detail.

In the present invention, the main component of the deflection yoke 100, that is, the fallopian tube-shaped coil separator 11, the vertical deflection coil 12 mounted on the outer peripheral surface of the coil separator 11 and the inner peripheral surface of the coil separator The horizontal deflection coil (not shown) is the same as the above-described prior art.

2 and 3, the correction iron piece 16 according to the present invention is slidably inserted fixed to the fixing member 14 formed integrally on the upper surface of the neck portion 13 of the deflection yoke 100.

First, the fixing member 14 is injection molded integrally with the neck portion 13 of the deflection yoke 100, and is formed in a plurality, preferably six places on the upper surface of the neck portion (13).

That is, as shown, the fixing member 14 is formed in a total of six locations on the upper edge of the neck portion 13 each facing each other, and the correction iron piece 16 according to the type of miss convergence appearing on the screen By allowing insertion and fixing in different combinations, the miss convergence can be corrected effectively.

Of course, depending on the application to which the deflection yoke 100 is applied, the number of fixing members 14 may be, for example, two, four or so that fewer or more correction iron pieces can be inserted than shown. Obviously, it can be increased or decreased by eight. In addition, the present invention discloses that the forming position of the fixing member 14 is the upper surface of the neck portion 13, but is not limited thereto, and those skilled in the art will appreciate that it may be appropriately formed on the bottom surface of the neck portion 13. will be.

The fixing member 14 includes two guides 14a and 14b spaced apart in parallel at predetermined intervals, respectively. The guides 14a and 14b are approximately L-shaped and spaced apart by the width of the corrected iron piece 16 so that two of them are integrally protruded from the upper surface of the neck portion 13 in a pair. Each of the guides 14a and 14b preferably has elasticity in a range that can be bent finely in an outward direction so that the correction iron pieces 16 can be easily inserted when the correction iron pieces 16 are inserted.

As clearly shown in Fig. 3, the toothed portion 15 is formed on the inner surface of the guide 14a, 14b, that is, the guide surface. The toothed portion 15 of the guide surface has the same shape corresponding to the toothed portion 16a of the corrected iron piece 16, as described below, and both toothed portions 15 and 16a engage with each other when the corrected iron piece 16 is inserted. This prevents the flow of the correction iron piece 16 in the fixing member (14).

The correction iron piece 16 is a substantially rectangular flat plate type, and as is well known, the iron piece of permalloy material having magnetic properties. When the correction iron piece 16 is slidably inserted into the fixing member 14, at least one of the contact surfaces contacting the guide surface, the tooth portion 16a of the same shape corresponding to the teeth 15 of the guide surface described above. Is preferably formed.

In addition, although the tooth portion 16a of the correction iron piece 16 may be formed on the entire side surface in contact with the guide surface, as shown, it is more preferable not to form the tooth portion at the tip thereof. This is to ensure that when the correction iron piece 16 is inserted into the fixing member 14, the tip of the correction iron piece 16 can be easily inserted without being engaged with the teeth 15 of the guides 14a and 14b.

In addition, the toothed portion 15 of the fixing member 14 and the toothed portion 16a of the corrected iron piece 16 consider that the corrected iron piece 16 is slidably inserted from the outside of the neck portion 13 to the inside. The shape is determined. For example, as shown in FIG. 3, when the insertion of the correction iron piece 16 is possible to proceed in the insertion direction but the progress in the reverse direction, the teeth of the correction iron piece 16 is opposite to the traveling direction (arrow) Inclined shape is most preferred.

The fixing member 14 and the teeth 15 and 16a of the correction iron piece 16 having such a shape provide a more firm coupling force to each other, thereby correcting the iron piece 16 by minute vibrations repeatedly generated in the cathode ray tube. It provides a simple and effective means for preventing flow or stripping of the fastening member 16.

Hereinafter, the assembly of the deflection yoke correction iron piece for the cathode ray tube according to the present invention will be described in detail.

First, the operator must install the deflection yoke in the cathode ray tube and supply power to determine the on-screen miss convergence to be corrected in relation to the cathode ray tube.

For example, if the miss convergence on the screen is the Yv miss convergence of the B beam and the R beam shown in 4, the correction iron piece should be inserted at the position shown in FIG. On the other hand, when the miss convergence on the screen is the G-beam tilt shown in FIG. 6, the correction iron piece should be inserted at the position shown in FIG.

That is, in the case of Yv miss convergence of the B beam and the R beam caused by mismatching of the B beam and the R beam, the Yv miss convergence will be corrected by inserting the correction iron piece at the position marked in black in FIG. 5. On the other hand, in the case of the G-beam tilt in which the screen is inclined to the left and right and in a parallelogram shape, the G-beam tilt will be corrected when the correction iron piece is inserted at the position indicated in black in FIG. 7.

In fact, since the miss convergence that appears on the screen can be expressed simultaneously with not only the above-described Yv miss convergence or G-beam tilt, but also other forms of miss convergence, the insertion position of the correction iron piece is not limited to the example described above, but in various combinations. Those skilled in the art will appreciate that they may be constructed.

In this way, when the miss convergence to be corrected is determined and a correction position capable of correcting the miss convergence is determined, the operator inserts the correction iron piece into the fixing member provided at the correction position.

Referring back to Figures 2 and 3, the insertion of the correction iron piece 16 to the fixing member 14 can be made simply. First, the tip of the correction iron piece 16 is inserted between the fixing member 14, that is, the guides 14a and 14b, and then the end of the correction iron piece 16 is pressed. Accordingly, the correction iron piece 16 is guided by the guide surface and slides, and the guides 14a and 14b are pressurized by the correction iron piece 16 to be inserted and bent outward so that the correction iron piece 16 is easy. To be able to slide.

At this time, the teeth 16a formed on both sides of the correction iron piece 16 are engaged with the teeth 15 formed on the inner surfaces of the guides 14a and 14b, thereby being firmly coupled to each other. In addition, since the teeth 16a and 15 of the correction iron piece 16 and the fixing member 14 are shaped so that the advancing in the insertion direction is possible, but the advancing in the opposite direction is limited, as described above, More robust.

The teeth 16a and 15 of the correction iron piece 16 and the fixing member 14 may serve as a structure that can be set by the operator with a certain correction reference. That is, when correcting the miss convergence on the screen, for example, when correcting the Yv miss convergence of the B beam and the R beam, the Yv miss convergence or the distance between the B beam and the R beam to be corrected is digitized, and the numerical value is adjusted. Corresponding to the number of teeth of a tooth part, it can employ | adopt as a correction standard of miss convergence.

It will be appreciated by those skilled in the art that the present invention is not limited to the above examples, and that various changes and modifications can be made without departing from the spirit and scope of the invention as set forth in the claims.

For example, as a modification of the correction iron piece according to the present invention, when inserting the correction iron piece in the above-mentioned fixing member, it is also possible to add a handle to the correction iron piece so that the operator can easily grip and transport or press Do.

As shown in FIG. 8, the correction iron piece 17 according to the modification of the present invention is the same as described above for all other configurations, such as a tooth, except that the end of the correction iron piece 17 is bent at a right angle to the handle ( The point which added 17a) is different. As such, the correction iron piece 17 provided with the handle 17a can be easily gripped and transported by an operator in an actual workplace, and can be pressurized when the correction iron piece 17 is inserted into the fixing member 14. The large contact area allows the operator to insert calibrated iron with less force.

As described above, the deflection yoke correction iron piece for the cathode ray tube according to the present invention does not use an adhesive such as a bond for fixing the correction iron piece, it is excellent in work efficiency and can improve the environment of the work line cleanly, Since the operator does not set the fixed position of the corrected iron piece arbitrarily, it is possible to suppress the occurrence of scattering according to the operator, and is firmly coupled to each other by the toothed part of the corrected iron piece and the fixing member, and correction of miss convergence by using the toothed part Standards can be easily set.

Claims (5)

In the deflection yoke correction iron piece for a cathode ray tube for partially changing the magnetic field of the deflection yoke for a cathode ray tube and correcting the miss convergence on a screen, Deflected yoke correction iron piece for cathode ray tube, characterized in that the slide is inserted and fixed to the fixing member formed on the neck portion of the deflection yoke, the tooth is formed on at least one surface of the contact surface in contact with the fixing member. According to claim 1, wherein the fixing member is formed integrally with the neck portion and comprises two guides spaced in parallel at a predetermined interval, the guide surface of the guide is a tooth portion of a shape corresponding to the teeth of the correction iron piece And the toothed portion of the corrected iron piece is engaged with the toothed portion of the guide and is fixed. The deflection yoke correcting iron piece for cathode ray tube according to claim 1 or 2, wherein the fixing member is formed on six surfaces of the neck portion. The deflection yoke correction iron piece for cathode ray tube according to claim 1 or 2, wherein the correction iron piece is flat. 5. The deflection yoke correction iron piece for cathode ray tube according to claim 4, wherein the correction iron piece further includes a handle at an end thereof.