JPH05174729A - Deflection yoke - Google Patents

Abstract

PURPOSE:To make correction of chromatic convergence error by moving a corrective magnetic piece while watching the picture plane. CONSTITUTION:A micro-gap, 8 is formed between a liner 3 on the horizontally deflecting coil 4 and the vertically deflecting coil 5 side, and a magnetic piece holddown plate 12 is inserted in this micro-gap 8. A corrective magnetic piece 7 is secured to the foremost of this holddown plate 12, and the position of each corrective magnetic piece 7 is adjusted by installing the deflection yoke 1 in a cathode-ray tube and moving the holddown plate 12 in the direction of inserting and drawing out while watching the picture plane, and thereby the distribution of the deflective magnetic field is varied, and the corrective magnetic piece 7 is fixed in the position presenting no chromatic convergence error.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke used in a television receiver or a display device.

[0002]

2. Description of the Related Art As is well known, as shown in FIG. 5, a deflection yoke 1 has a paddle shape as shown in FIG. 7 on the top side and the bottom side along an inner peripheral surface of a liner 3 having a morning glory shape. A saddle-saddle type in which a pair of horizontal deflection coils 4 are provided, a pair of paddle-shaped vertical deflection coils 5 are provided on the left and right outer sides of the liner 3, and a core 6 is provided outside the vertical deflection coils 5. As shown in FIG. 6, a pair of paddle-shaped horizontal deflection coils 4 are attached to the top side and the bottom side along the inner peripheral surface of the liner 3, and the core 6 is provided outside the liner 3.
There is a saddle-toroidal type deflection yoke in which the vertical deflection coil 5 is obtained by winding a coil winding on the top side and the bottom side of the core 6 in a toroidal manner.

This type of deflection yoke 1 is mounted on a cathode ray tube in the deflection magnetic field adjusting step, and the state of color deviation of the screen is inspected. If there is color deviation, as shown in FIGS. 3 and 4, The correction magnetic piece 7 is attached to the peripheral surface of the horizontal deflection coil 4 by using an adhesive tape or the like, and the distribution of the deflection magnetic field is adjusted so that the color misregistration is reduced to obtain a product.

[0004]

However, in the adjustment work of the color misregistration correction of the deflection yoke, the correction magnetic piece 7 is attached to the horizontal deflection coil 4 and then the deflection yoke 1 is attached to the cathode ray tube to cause the color misregistration. Check the correction state of No. 1, and if the color misregistration still remains, remove the deflection yoke 1 again from the cathode ray tube, shift the attachment position of the correction magnetic piece 7, and again attach the deflection yoke 1 to the cathode ray tube to discolor the color. The work must be repeated until the color misregistration falls within the allowable range, such as inspecting the correction state of No. 1, and the adjustment of the mounting position of the correction magnetic piece 7 is extremely troublesome, the work efficiency is poor, and the deflection yoke 1 Was a hindrance to improving productivity.

Further, when correcting the color misregistration of the screen, it is necessary to remove the deflection yoke 1 from the cathode ray tube and shift the position of the correction magnetic piece 7 once. Since it is not possible to make adjustments, it is difficult to completely eliminate color misregistration.For this reason, in the past, even if there is 20 to 30% of color misregistration correction remaining, it is unavoidable that There was a circumstance that I had to ship as a product that passed the inspection.

The present invention has been made in order to solve the above-mentioned conventional problems, and the purpose thereof is to make it very easy to adjust the mounting position of the correction magnetic piece and to mount the deflection yoke on the cathode ray tube. Another object of the present invention is to provide a deflection yoke capable of adjusting the color shift while observing the screen.

[0007]

In order to achieve the above object, the present invention is configured as follows. That is, the present invention provides a deflection yoke in which a horizontal deflection coil is mounted along the inner peripheral surface of a morning glory liner, and a vertical deflection coil is mounted outside the liner. A minute gap is formed between them, and a non-magnetic magnetic piece mounting plate having a correction magnetic piece fixed to a partial area of the plate surface is inserted into this minute gap. There is.

[0008]

In the present invention having the above structure, the deflection yoke is attached to the cathode ray tube, and the presence or absence of color misregistration on the screen is observed.
When there is a color shift, the magnetic piece mounting plate is inserted into the minute gap between the liner and the vertical deflection coil side. Then, a partial region of the magnetic piece mounting plate, for example, the correction magnetic piece fixed to the tip side is inserted between the horizontal deflection coil and the vertical deflection coil. The position where the correction magnetic piece faces the horizontal and vertical deflection coils changes depending on the insertion position of the magnetic piece mounting plate, and the distribution of the deflection magnetic field of the deflection yoke changes by moving the magnetic piece mounting plate in the inserting / removing direction. However, along with this, the state of color misregistration also changes. Therefore, by observing the screen, the correction magnetic piece is moved to a position where the color misregistration is completely eliminated, and the magnetic piece mounting plate is integrally fixed to the deflection yoke at this position, whereby the deflection yoke having no color misregistration is manufactured.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In the description of this embodiment, the same parts as those in the conventional example are designated by the same reference numerals, and the duplicate description thereof will be omitted. Figure 1
Shows the configuration of the essential parts of an embodiment of the deflection yoke according to the present invention. A characteristic of this embodiment is that a minute gap 8 between the liner 3 in which the horizontal deflection coil 4 is installed and the vertical deflection coil 5 does not deteriorate the deflection sensitivity.
The magnetic piece mounting plate 12 is inserted into the minute gap 8 and the correction magnetic piece 7 fixed to the tip end side of the magnetic piece mounting plate 12 is moved in the inserting / removing direction of the magnetic piece mounting plate 12 to be deflected. The configuration is such that the distribution of the magnetic field is adjusted, and the other configurations are the same as those in the conventional example.

In this embodiment, the vertical deflection coil 5 is formed by mounting a paddle-shaped coil on the outer peripheral surface of a morning glory liner 10, and the vertical deflection coil 5 accommodated in the liner 10 is horizontal. The saddle-saddle type deflection yoke is formed by mounting the deflection coil 4 on the outside of the liner 3 and the core 6 on the outside of the vertical deflection coil 5. The minute gap 8 is formed between the liner 3 on the side of the horizontal deflection coil 4 and the liner 10 on the side of the vertical deflection coil 5.

The magnetic piece mounting plate 12 has insulating, elastic,
It is made of a material having heat resistance, flexibility and flame retardancy, that is, a polypropylene material in this embodiment, and as shown in FIG. It is fixed, and glue 11 is applied to the surface on the base end side. In this embodiment, the total thickness t of the magnetic piece mounting plate 12 and the correction magnetic piece 7 is 1 mm or less. The correction piece mounting plate 12 is inserted into the minute gap 8 from the head side of the deflection yoke, with the side of the correction magnetic piece 7 at the top.

This embodiment is configured as described above. Next, the correction operation of the color misregistration of the deflection yoke 1 will be described. First, the deflection yoke 1 is attached to the cathode ray tube, and the presence or absence of color shift on the screen is observed. If there is a color shift, the magnetic piece mounting plate 12 is inserted into the minute gap 8 while watching the screen while the deflection yoke 1 is mounted on the cathode ray tube. As the magnetic piece mounting plate 12 moves in, the position of the correction magnetic piece 7 is displaced, and as a result, the distribution state of the deflection magnetic field is changed and the color misregistration state is also changed. While watching the color shift state of the screen, move the magnetic piece mounting plate 12 in the inserting / removing direction, stop the inserting / removing movement of the magnetic piece mounting plate 12 at the position where there is no color shift, and in this state, use the glue 11 , Magnetic piece mounting plate
Temporarily fix 12 to liner 3. Then, while the magnetic piece mounting plate 12 is temporarily fixed, an adhesive such as hot melt is injected into the minute gap 8 so that the correction magnetic piece 7 is set horizontally at the optimum position for color misregistration correction. It is permanently fixed between the deflection coil 4 and the vertical deflection coil 5. At this time, the protruding portion of the magnetic piece mounting plate 12 protruding outside from the insertion port 10 is cut and removed as necessary.

As described above, when the color misregistration of the deflection yoke 1 is corrected, the magnetic piece mounting plate 12 is inserted through the minute gap 8 and the magnetic piece mounting plate 12 is inserted and removed while watching the screen. Since the color misregistration can be corrected, the work is very easy, the work efficiency is improved, and the productivity of the deflection yoke can be improved.
With the configuration of this embodiment, the number of man-hours for color misregistration correction is
We were able to improve by 70%.

Further, since the color misregistration can be corrected while looking at the screen, the correction magnetic piece 7 can be set at a position where the color misregistration is completely eliminated, so that there is almost no residual color misregistration. It is possible to achieve a color shift correction accuracy of 100%.

The present invention is not limited to the above-mentioned embodiments, and various embodiments can be adopted. For example, although the vertical deflection coil 5 is housed in the liner 10 in the above embodiment, the liner 10 may be omitted.

In the above embodiment, the saddle-saddle type deflection yoke has been described, but the present invention is also applicable to a saddle-toroidal type deflection yoke.

Further, the correction magnetic piece 7 is a magnetic piece mounting plate.
Although it is provided on one side of 12, it may be provided on both sides.

[0018]

According to the present invention, a minute gap is formed between the horizontal deflection coil and the vertical deflection coil, and the magnetic piece mounting plate to which the correction magnetic piece is fixed is inserted into this minute gap. Therefore, the position of the correction magnetic piece can be displaced with respect to the deflection coil by moving the magnetic piece mounting plate inserted in the minute gap in the inserting / removing direction. It is possible to set the correction magnetic piece at a position where there is no color misregistration by removing and inserting and moving.

As described above, according to the present invention, when the color misregistration is corrected, it is not necessary to remove the deflection yoke from the cathode ray tube and adjust the mounting position of the correction magnetic piece, unlike the conventional example. The deviation adjustment work becomes very easy, and it becomes possible to improve the productivity as the work efficiency improves.

Moreover, since the color misregistration can be corrected while looking at the screen, there is almost no correction remaining, and it is almost 100%.
The color misregistration correction can be performed with the accuracy of 1 and the quality of the deflection yoke (the color misregistration defect rate is 0%) can be significantly improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a deflection yoke according to the present invention.

FIG. 2 is an explanatory view of a magnetic piece mounting plate having a magnetic piece used in the deflection yoke of the embodiment.

FIG. 3 is an explanatory diagram of an example of attaching a correction magnetic piece in a conventional deflection yoke.

FIG. 4 is a partial cross-sectional view of a conventional deflection yoke with a correction magnetic piece attached.

FIG. 5 is an explanatory diagram of a general saddle-saddle type deflection yoke.

FIG. 6 is an explanatory view of a general saddle-toroidal type deflection yoke.

FIG. 7 is an external view of a saddle type deflection coil.

[Explanation of symbols]

 1 Deflection Yoke 3 Liner 4 Horizontal Deflection Coil 5 Vertical Deflection Coil 7 Correction Magnetic Piece 8 Small Gap 12 Magnetic Piece Attachment Plate

Claims (1)

[Claims] 1. A deflection yoke in which a horizontal deflection coil is mounted along an inner peripheral surface of a morning glory liner, and a vertical deflection coil is mounted outside the liner. A deflection yoke, wherein a minute gap is formed therebetween, and a non-magnetic magnetic piece mounting plate having a correction magnetic piece fixed to a partial area of a plate surface is inserted into the minute gap.