CN1215523C

CN1215523C - Deflection coil

Info

Publication number: CN1215523C
Application number: CNB031014712A
Authority: CN
Inventors: 野泽崇浩
Original assignee: Victor Company of Japan Ltd
Current assignee: Victor Company of Japan Ltd
Priority date: 2002-04-30
Filing date: 2003-01-17
Publication date: 2005-08-17
Anticipated expiration: 2023-01-17
Also published as: JP4088879B2; KR20030085462A; TW200305909A; KR100487179B1; CN1455430A; TWI222095B; JP2004031306A

Abstract

The present invention provides a deflection yoke to which adjustments to correct the YV mis-convergence and scanning surface distortion can be completed with very few parts and assembly processes, and having very low cost. The front ends of a pair of reverse-U shaped magnetic cores 2 having the correction coil 2a are installed oppositely with the neck portion 1c inbetween. A first magnetic sheet 3A and the second magnetic sheet 3B are disposed on the protruded edge 1b with a narrow diameter of the magnetic core 2 respectively, so that they are disposed near at least one of the front end portion. At the same time, a pair of magnetic sheets allocated near the front end portion is connected by resin for integration. A first guiding portion 6Aa, a second guiding portion 6Ba extended in the rib-like shape along the direction approximately parallel to the protruded edge 1b with a narrow diameter, are installed on the side of protruded edge with a narrow diameter and its opposite side near the front end portion respectively. Thus, the first magnetic sheet and the second magnetic sheet abut against the first installation portion 4A and the second installation portion 4B for proceeding installation in the first and the second guiding portions.

Description

Deflecting coil

Technical field

The present invention relates to television receiver and display unit etc. and utilize employed deflecting coil in the image display device of color picture tube, relate in particular to the structure that YV misconvergence and raster distortion are compensated.

Prior art

Using 3 rifle in-lines to arrange in the image display device of color picture tube (hereinafter to be referred as CRT), it is to adopt the deflecting coil of auto-convergence mode that 3 electron beams that 3 electron guns are launched are focused at one of method on the screen well.

The deflecting coil of auto-convergence mode, general structure is: isolate skeleton (separator) in the funnel-form of being made by insulating material and go up the installation coil, its installed inside is a pair of shape of a saddle horizontal deflection coil up and down; Pair of right and left shape of a saddle frame deflector coil is installed in its outside, and its convergence characteristics is good.

The convergence characteristics of this deflecting coil and deflection distortion characteristic depend primarily on the position of electric wire of horizontal deflection coil and frame deflector coil (below be generically and collectively referred to as deflecting coil) and the influence of spatial distribution thereof, so, the shape of the deflecting coil that uses and electric wire distributed critically set and form, can obtain required characteristic.

Yet, during batch process because the characteristic deviation of each deflecting coil and the offset when assembling this coil can produce misconvergence and overproof deflection distortion.

At first, this misconvergence is described.

Fig. 8 (a), Fig. 8 (b) represent when vertical deflection magnetic field is in left and right sides non-equilibrium state, the misconvergence figure on the picture of generation.

The misconvergence figure that Fig. 8 (a) expression produced when time a little less than the magnetic field that the magnetic field that R (redness) electron beam is accepted is accepted than B (blueness) electron beam.

The misconvergence figure that Fig. 8 (b) expression produced when time a little less than the magnetic field that the magnetic field that the B electron beam is accepted is accepted than R electron beam.

R, B represent respectively with the bright line on the picture of R bundle and the scanning of B bundle in these two figure.These misconvergences are commonly referred to as the YV misconvergence.

Below utilize Fig. 9, describe deflection distortion in detail.

Fig. 9 (a), Fig. 9 (b) expression when the distribution of vertical deflection magnetic field with the tube's axis of CRT be the center and on direction of rotation during skew the grating ordinate on the picture of generation topple over distortion.

Fig. 9 (a) expression vertical deflection magnetic field sees with the tube's axis to be the deflection distortion figure that the center produces from big footpath side when counter-clockwise direction of rotation is offset.

Fig. 9 (b) expression vertical deflection magnetic field sees with the tube's axis to be the deflection distortion figure that the center produces from big footpath side when the dextrorotation veer is offset.

Oblique line among two figure is represented the bright line on picture by R, G, each electron beam scanning of B.These tilts are commonly referred to as raster distortion.

In order to compensate these characteristic defectives, be example with the deflecting coil in past, have following formation.Be illustrated with Figure 10.

That is to say that on the upper-lower position of the neck 41 on the clamping path flange 40, a pair of bucking coil 113a, the 113b that is connected with frame deflector coil is installed respectively, this coil is wound on respectively on " U " shaped iron core 101a, the 101b in advance;

Magnetic piece

30a, 30b are installed near the leading section of this

iron core

101a, 101b on the neck side of path flange 40.

This

magnetic piece

30a, 30b are magnetized by required amount and direction by the magnetic field that U shaped

iron core

101a, 101b produce, and change the track of electron beam.Like this, on one side about certain this magnetic piece is installed can be compensated the YV misconvergence; And this magnetic piece is installed in the left and right sides can the null grating distortion.

But in the production of deflecting coil, deflecting coil is installed to adjustment with on the CRT before dispatching from the factory, and utilizes above-mentioned compensation to adjust with magnetic piece, dispatches from the factory then.And the deflecting coil that has dispatched from the factory is installed on the CRT of batch process at the place of receiving, and one is used from display unit.

But usually, the CRT of employed batch process and adjustment are used between the CRT in the display unit, and be different on characteristic.For example, because the deviation of the electron gun position of CRT inside is when making the track of electron beam depart from horizontal direction,, produce the YV misconvergence shown in Fig. 8 (a), Fig. 8 (b) with the same when uneven about vertical deflection magnetic field.

Therefore, must compensate operation, new adjustment magnetic piece is installed on this deflecting coil, make the characteristic of deflecting coil be suitable for the finally CRT characteristic of the batch process of installation.

But, in the compensating operation when deflecting coil dispatches from the factory, if magnetic piece has been installed, so, just the problem of new magnetic piece has appearred installing again shown in the example of Figure 10.

And, if the new magnetic piece of overlapping again installation on mounted magnetic piece, so, because the magnetic piece of installing is near from the distance of U shaped iron core foot earlier, so, magnetized by the magnetic field that this iron core produces, the compensation effect that performance is necessary, but the magnetic piece of installing afterwards is because of the distance from U shaped iron core foot, and the magnetic of the near magnetic piece generation of being installed is earlier blocked, so almost can not magnetize, therefore produce the problem that does not reach compensation effect.

In order to address this is that, following deflecting coil scheme has been proposed, promptly this deflecting coil has patent documentation 1 described YV misconvergence adjustment with coil and compensating circuit, can utilize above-mentioned compensation to adjust the YV misconvergence with the method beyond the magnetic piece adjustment.

[patent documentation 1] spy opens flat 11-176358 communique

If according to this patent documentation 1 described invention, then when producing deflecting coil, adjust with magnetic piece, and, to installing to batch process on the display unit when installing on CRT, utilize compensating circuit adjustment, utilize compensation to adjust method and compensating circuit adjustment method respectively, can address the above problem with magnetic piece.

But this deflecting coil must be ressembled the YV misconvergence and adjust special-purpose bucking coil and compensating circuit, so the problem that occurs is: increase when causing part number and assembler, cost improves.

Therefore, problem to be solved by this invention provides such deflecting coil, adjustment when the deflecting coil that carries out in order to compensate YV misconvergence and raster distortion is produced and go up adjustment when installing to the CRT that produces usefulness in batches is during with the least possible part number and assembler, realize cost degradation.

Summary of the invention

In order to address the above problem, the present invention adopts following structure.

That is to say that the deflecting coil of claim 1 has:

Isolate skeleton 1, it forms funnel-form, has big footpath flange 1a and path flange 1b respectively in big footpath side and path side, and neck 1c cylindraceous is set on above-mentioned path flange 1b and on the opposite direction of above-mentioned big footpath side; A pair of frame deflector coil, it is configured in the outside of above-mentioned isolation skeleton 1; Bucking coil 2a, it is connected with above-mentioned frame deflector coil; And a pair of U shaped iron core 2, twine above-mentioned bucking coil on it, the both sides that above-mentioned pair of core 2 are installed in above-mentioned neck 1c are clamped in neck therebetween and make the leading section of this iron core 2 be state opposite one another, it is characterized in that having:

The 1st magnetic piece 3A, it is configured in above-mentioned unshakable in one's determination 2 above-mentioned path flange 1b side; And the 2nd magnetic piece 3B, it is configured in the opposition side of above-mentioned unshakable in one's determination 2 above-mentioned path flange 1b, above-mentioned the 1st magnetic piece 3A be configured in a plurality of above-mentioned leading sections at least one near, simultaneously, above-mentioned the 2nd magnetic piece 3B be configured in a plurality of above-mentioned leading sections at least one near.

Claim 2 is the described deflecting coils of claim 1, it is characterized in that: above-mentioned the 1st magnetic piece 3A and above-mentioned the 2nd magnetic piece 3B are near the above-mentioned leading section pair of magnetic sheets separately that is configured in opposite one another, utilize resin that this a pair of magnetic piece is connected to an integral body, constitute adjustment component 13.

Claim 3 is the described deflecting coils of claim 1, it is characterized in that: near the above-mentioned path flange 1b side above-mentioned each leading section, has the 1st installation portion 4A, the 1st installation portion 4A has and is being the 1st guide part 6Aa that the rib shape extends substantially with on the direction that above-mentioned path flange 1b parallels, 6Bb, can make above-mentioned the 1st magnetic piece 3A and above-mentioned the 1st guide part 6Aa, 6Bb overlaps mutually and installs, the opposition side of the above-mentioned path flange 1b of while above-mentioned each leading section near, has the 2nd installation portion, the 2nd installation portion has and is being the 2nd guide part 6Ba that the rib shape extends substantially with on the direction that above-mentioned path flange 1b parallels, 6Bb can make above-mentioned the 2nd magnetic piece 3B and above-mentioned the 2nd guide part 6Ba, 6Bb overlaps mutually and installs.

Claim 4 is the described deflecting coils of claim 2, it is characterized in that: near the above-mentioned path flange side 1b place above-mentioned each leading section, has the 1st installation portion 4A, the 1st installation portion 4A has and is extending into the 1st guide part 6Aa of rib shape substantially with on the direction that above-mentioned path flange 1b parallels, 6Ab, can make the adjustment component 13 and above-mentioned the 1st guide part 6Aa that comprise above-mentioned the 1st magnetic piece 3A and constitute, 6Ab overlaps mutually and installs, the opposition side of the above-mentioned path flange 1b of while above-mentioned each leading section near, has the 2nd installation portion 4B, the 2nd installation portion has and is being the 2nd guide part 6Ba that the rib shape extends substantially with on the direction that above-mentioned path flange 1b parallels, 6Bb can make above-mentioned adjustment component that comprises the 2nd magnetic piece 3B and constitute 13 and above-mentioned the 2nd guide part 6Ba, 6Bb overlaps mutually and installs.

Claim 5 is each the described deflecting coils in the claim 1～4, it is characterized in that: during as tube's axis, above-mentioned the 1st magnetic piece 3A or the interval of above-mentioned the 2nd magnetic piece 3B and above-mentioned unshakable in one's determination 2 on the aforementioned tube axis direction remain in the 2.5mm with the direction that runs through above-mentioned neck center.

Description of drawings

Fig. 1 is the oblique view of the embodiment of expression deflecting coil of the present invention.

Fig. 2 is the neck oblique view of formation of the embodiment of expression deflecting coil of the present invention.

Fig. 3 is the sectional drawing of the embodiment of explanation deflecting coil of the present invention.

Fig. 4 is the summary plane graph of the embodiment of explanation deflecting coil of the present invention.

Fig. 5 is the summary plane graph of the embodiment of explanation deflecting coil of the present invention.

Fig. 6 is the figure of effect of the embodiment of explanation deflecting coil of the present invention.

Fig. 7 is the figure of effect of the embodiment of explanation deflecting coil of the present invention.

Fig. 8 is the figure of explanation YV misconvergence.

Fig. 9 is the figure of explanation raster distortion.

Figure 10 is the curve chart of the effect of explanation deflecting coil embodiment of the present invention.

Figure 11 is another curve chart of the effect of explanation deflecting coil embodiment of the present invention.

Figure 12 is the plane graph of variation of the major part of explanation deflecting coil embodiment of the present invention.

Figure 13 is the summary plane graph of the variation of explanation deflecting coil embodiment of the present invention.

Figure 14 is the oblique view of the summary of expression deflecting coil one example in the past.

Embodiment

Below utilize Fig. 1～Figure 13, describe most preferred embodiment of the present invention in detail.

Fig. 1 is the summary oblique view of the embodiment of expression deflecting coil of the present invention.

Fig. 2 is the neck summary oblique view of the embodiment of explanation deflecting coil of the present invention.

Fig. 3 is the neck summary oblique view of the embodiment of expression deflecting coil of the present invention.

Fig. 8 is the figure of explanation YV misconvergence.

Fig. 9 is the figure of explanation raster distortion.

Figure 10 is the curve chart of effect of the embodiment of explanation deflecting coil of the present invention.

Figure 11 is another curve chart of effect of the embodiment of explanation deflecting coil of the present invention.

Figure 12 is the plane graph of variation of major part of the embodiment of explanation deflecting coil of the present invention.

Figure 13 is the plane graph of summary of variation of the embodiment of explanation deflecting coil of the present invention.

At first, utilize Fig. 1, the integral body that describes deflecting coil of the present invention in detail constitutes.

In Fig. 1, deflecting coil is for example isolated skeleton 1 to a pair of semi-annular shape and is combined, and forms funnel-form substantially, on one side it is a big footpath side, another side is the path side, and both sides have flange 1a, 1b respectively.

At the installed inside shape of a saddle horizontal deflection coil (not shown) of isolating skeleton 1, shape of a saddle frame deflector coil (not shown) is installed in the outside.

In the outside of frame deflector coil, the iron core (not shown) that is formed by ferrite is installed.

And, isolate skeleton 1 and normally use sex change polyphenylene oxide (sex change PPE), polypropylene thermoplastic resins such as (PP) to make.

At the middle body utilization of the flange 1b of path side and flange 1b integral forming and make by what a plurality of tongue pieces constituted and be roughly columnar neck 1c, and it is given prominence on not shown CRT tube axial direction.This figure simplifies and has omitted tongue piece, represents neck 1c with cylinder.

This deflecting coil is the so-called shape of a saddle, the shape of a saddle (SS) the type deflecting coil that is made of above method substantially, but is not limited to this SS type, and can be the shape of a saddle, annular (ST) type deflecting coil.

And isolating skeleton 1 can not be a pair of semicircular ring also, but forms an integral body, and in addition, path side flange 1b and neck 1c also can separate independent formation.

Like this, the detailed structure of deflecting coil is not limited only to Fig. 1.

Below utilize Fig. 2, describe near the details of flange part 1b in detail.

Near the neck side of path side flange 1b, dispose a pair of bucking coil with U shaped iron core 2, and make its on the deflecting coil above-below direction opposite one another, clamping neck 1c.

This iron core 2 forms U fonts, its component part be matrix part 2b and from its two ends to the perpendicular upwardly extending a pair of 2c1 of foot in side, the 2c2 of matrix part 2b, on this matrix part 2b, twine bucking coil 2a.

Near the front end of the 2c1 of foot of the front side of this figure, unshakable in one's determination 2 and flange 1b between configuration the 1st magnetic piece 3A; On the other hand, on the position of the clamping iron core 2 relative, dispose the 2nd magnetic piece 3B with this magnetic piece 3A.

These

magnetic pieces

3A, 3B form the silicon steel sheet stamping-out of thickness 0.5mm.

Below utilize Fig. 3 exposed installation to put the topology example of this

magnetic piece

3A, 3B.

In the figure, near the front end of the 2c1 of foot, 2c2 on the face of the neck side of path side flange 1b, be provided with 4 the 1st installation portion 4A (rear side at figure is also the same with the front side, is provided with installation portion 4A, and is not shown) that are used to install magnetic piece 3A.

In addition, be provided with, a pair of slightly rectangular arched door shape installing rack 5 outstanding to the neck side direction on identical face, it is positioned at the both sides of neck 1c, and is opposed on above-below direction, has covered the 2c1 of foot unshakable in one's determination, the leading section of 2c2.

And, on this installing rack 5 with the 1st installation portion 4A on corresponding part on the tube's axis, be provided with 4 the 2nd installation portion 4B (, not shown) that the 2nd magnetic piece 3B are installed at the also the same installation portion 4B that is provided with of rear side of figure with the front side.

Magnetic piece

3A, 3B are installed on these installation portions 4A, 4B.The state of the 1st, the 2nd

magnetic piece

3A, 3B has been installed at 2 places, front side of the figure that the figure shows at the 1st, the 2nd installation portion 4A, 4B respectively.

1st, the 2nd installation portion 4A, 4B have the 1st guide part 6Aa, 6Ab and the 2nd guide part 6Ba, the 6Bb of rib shape, are used for overlapping mutually with the 1st, the 2nd

magnetic piece

3A, 3B, go up its guiding along direction shown in the arrow among the figure (horizontal direction of deflection wire).

1st, the 2nd guide part 6Aa, 6Ab, 6Ba, 6Bb are configured to: it is identical with each magnetic piece width at interval, extends on the direction parallel with flange 1b cardinal principle.

1st, the 2nd

magnetic piece

3A, 3B are configured on the optimum position of this installation portion 4A, 4B, after adjust finishing, utilize any means such as adhesive is bonding to be fixed on installation portion 4A, the 4B.

Below describe the adjustment of carrying out with magnetic piece in detail.

In the adjustment when producing deflecting coil (adjusting),, the 1st magnetic piece 3A is installed on the necessary position of the 1st installation portion 4A in order to compensate YV misconvergence or raster distortion to abbreviate the 1st as.

This installation is meant and makes the 1st magnetic piece 3A slide the operation of being fixed with any means along the 1st guide part 6Aa, 6Ab on the 1st installation portion 4A on the position that can reach the The optimal compensation effect.

Now be described in detail in (1) YV misconvergence of carrying out in the 1st adjustment, the compensation of (2) raster distortion successively.

(1) compensation of YV misconvergence

Utilize Fig. 4, describe the compensation of YV misconvergence in detail.

This figure is the figure that watches deflecting coil from the neck side of CRT.Omitted installing rack 5 etc.

If the 1st magnetic piece 3A is installed at the 1st installation portion 4A (2 place) that is positioned at this figure left side, the 1st magnetic piece 3A then, by the result of the magnetic field magnetisation that is produced by unshakable in one's determination 2 foot 2c1,2c2, having produced its direction is the magnetic field that the YV misconvergence shown in Fig. 8 (a) is compensated.

Now this magnetized effect is described with Fig. 6.

Fig. 6 watches near the deflecting coil neck synoptic diagram from big footpath side, has omitted installing rack 5 etc.R in central circle, G, B represent the position of the electron beam of shades of colour (red, green, blue), and X-axis is represented the horizontal direction of picture; Y represents the vertical direction of picture.

For example, when electron beam during to the deflection of picture upside, unshakable in one's determination 2 direction magnetization, the magnetic field that produces direction shown in the chain-dotted line along arrow 7.

Under this state, the 1st magnetic piece 3A is magnetized along the direction of arrow 8 respectively by 2 magnetic fields that produced unshakable in one's determination, produces the ring-type magnetic field of direction shown in the dotted line.

This ring-type magnetic field makes the R electron beam be subjected to the power of the direction of arrow 9, the R electron beam to the amount of deflection of Y direction greater than the B electron beam.

And, when electron beam during to the deflection of picture downside, from unshakable in one's determination 2 and the FR that produces of magnetic piece 3A, the R electron beam to the amount of deflection of-Y direction greater than the B electron beam.

Its result, the YV misconvergence of Fig. 8 (a) is compensated.

Under the situation of the YV misconvergence figure shown in Fig. 8 (b), the 1st magnetic piece 3A is arranged on Fig. 4 right side the 1st installation portion 4A (2 place).

In the case, because above-mentioned effect makes the amount of deflection of B electron beam Y direction increase the YV misconvergence shown in the energy compensation image 8 (b).

(2) compensation of raster distortion

So-called raster distortion is that the distribution of vertical deflection magnetic field is the grating ordinate tilt of center generation when be offset on direction of rotation with the CRT tube's axis as mentioned above, and Fig. 9 (a), Fig. 9 (b) represent this distortion figure.

Fig. 5 represents in order to compensate this raster distortion figure, and the 1st magnetic piece 3A is installed in example on the 1st installation portion 4A.

Fig. 5 is the figure that watches deflecting coil from CRT neck side, has omitted installing rack 5 etc.

In this example, one side on the installation portion 4A that is installed in this figure left upper portion of the 1st magnetic piece 3A, and, another side is installed on the 1st installation portion 4A of lower right side of this figure.

Like this, if the 1st magnetic piece 3A is installed, then magnetic piece 3A is by the result of unshakable in one's determination 2 magnetic field magnetisation that produce, and having produced its direction is the magnetic field of the raster distortion shown in the compensation image 9 (a).

With Fig. 7 this magnetized effect is described below.

Fig. 7 watches near the neck of deflecting coil synoptic diagram from big footpath side.Omitted installing rack 5.R, G in the circle of central authorities, the electron-beam position that B represents shades of colour (red, green, blue) respectively, and X represents the horizontal direction of picture; Y represents the vertical direction of picture.

For example at electron beam during to the deflection of picture upside, unshakable in one's determination 2 magnetize on the direction of arrow 10, produce the magnetic field of the direction shown in the chain-dotted line.

Under this state, the 1st magnetic piece 3A by by 2 magnetic fields that produced unshakable in one's determination respectively along magnetizing on arrow 11 directions, produce the ring-type magnetic field of direction shown in the dotted line.

This ring-type magnetic field makes R, G, B electron beam be subjected to the power of arrow 12 directions, each electron beam to figure upper right (+X ,+Y) direction deflection.(by arrow 12 representatives, being presented on the G electron beam among this figure).

And, when electron beam during to the deflection of picture downside, from unshakable in one's determination 2 and the FR that produces of magnetic piece 3, each electron beam also to the lower-left of figure (X ,-Y) direction deflection.

Its result, the raster distortion of energy compensation image 9 (a).

Under the situation of the raster distortion figure shown in Fig. 9 (b), the allocation position of the 1st magnetic piece 3A swaps left and right.

Like this, R, G, each electron beam of B be subjected to figure X or-power of directions X, the raster distortion shown in can compensation image 9 (b).

Finish the above the 1st and adjust, necessary locational the 1st magnetic piece 3A that is installed in the 1st installation portion 4A dispatches from the factory after fixing with any means such as bonding agent are bonding.

Place of acceptance this deflecting coil is installed in install to batch process on the display unit with CRT on, carry out the 2nd with the characteristic deviation of CRT and adjust for compensating this batch process.

In the 2nd adjusts, the 2nd magnetic piece 3B is installed on the 2nd installation portion 4B.

This fitting operation as mentioned above, is that the 2nd guide rail 6Ba, the 6Bb that instigates the 2nd magnetic piece 3B to have on the 2nd installation portion 4B slides the operation of fixing with any means on the position that can obtain the The optimal compensation effect.

Be installed in the 2nd magnetic piece 3B on the 2nd installation portion 4B to the compensating action of YV misconvergence and raster distortion, identical with the compensating action of the 1st magnetic piece 3A on being installed in the 1st installation portion 4A.

In the formation of above explanation, the 1st, the 2nd

magnetic piece

3A, 3B are installed in respectively near unshakable in one's determination 2 the 2c1 of foot, the 2c2 front end, make its clamping iron core 2, be positioned at big footpath side and neck side two places, like this, each magnetic piece can obtain compensation effect to can not blocked mutually by 2 magnetic fields that produced unshakable in one's determination.

And, magnetic piece 3A is installed when the 1st adjusts; When the 2nd adjusts, magnetic piece 3B is installed, but also can magnetic piece 3B be installed when the 1st adjusts, magnetic piece 3A is installed when the 2nd adjusts.

Utilize the 1st to adjust the 1st magnetic piece 3A is installed under the locational situation of null grating distortion of Fig. 5 and Fig. 7 explanation, self-evidently also can utilize the 2nd adjustment to obtain compensation effect the YV misconvergence.

That is to say, the 1st adjustment and the 2nd is adjusted interacted, but can compensate independently.

But, the distance L of the tube axis direction of the 2 and the 1st magnetic piece 3A unshakable in one's determination or the 2nd magnetic piece 3B and the relation of gained compensation effect, wait the result of research with keen determination through inventor, found to make deflecting coil to obtain necessary and distance and optimum magnetic sheet adjustment amount fully compensation rate now are described as follows.Described the 1st magnetic piece 3A in the explanation, but the 2nd magnetic piece 3B also is the same.

Because the 1st magnetic piece 3A is by 2 magnetic field magnetisation that produced unshakable in one's determination, so the distance L between the 2 and the 1st magnetic piece 3A unshakable in one's determination is near more, magnetize strong more, the compensation rate increase.And if the 2 and the 1st magnetic piece 3A unshakable in one's determination is configured to equitant state on tube axis direction, the 1st magnetic piece 3A is the closer to tube's axis (in other words electron beam) so, and compensation rate is big more.

Compensation rate in the above-mentioned the 1st adjusts on the picture of necessity, requiring the YV misconvergence is more than the 0.2mm; To raster distortion is more than the 0.5mm.

Therefore, be placed on the position that its front end and the outer wall of neck 1c overlap mutually (coming down to magnetic piece) at following the 1st magnetic piece 3A of following condition near the position of tube's axis, change the interval of the 2 and the 1st magnetic piece 3A unshakable in one's determination, it is the distance L of tube axis direction, compensation rate when measuring each distance L, it the results are shown in table 1.And, this result is divided into curve chart is shown in Figure 10.

＜measuring condition 〉

The bucking coil number of turn: 55 circles

Bucking coil electric current: 1.218A (peak-peak)

Magnetic piece size: long 24mm, wide 5mm, thick 0.5mm.

[table 1]

The distance (mm) of iron core and magnetic piece	0.50	1.00	1.50	2.00	2.50	3.00
The distance (mm) of iron core and magnetic piece	0.50	1.00	1.50	2.00	2.50	3.00	YV misconvergence compensation rate (mm)	0.49	0.37	0.30	0.25	0.21	0.18
Raster distortion compensation rate (mm)	1.06	0.86	0.74	0.66	0.58	0.54	YV misconvergence compensation rate (mm)	0.49	0.37	0.30	0.25	0.21	0.18

From this result as can be seen: can satisfy YV misconvergence and two aspects of raster distortion in order to make above-mentioned compensation rate, distance L is preferably below 2.5mm.

On the other hand, this distance L is fixed as 0.5mm, on tube axis direction in the equitant scope, makes the 1st magnetic piece 3A move away that the relation of this amount of movement and compensation rate is shown in table 2 under the situation of tube's axis at the 2 and the 1st magnetic piece 3A unshakable in one's determination.

If the 1st magnetic piece 3A is 0mm near the position of tube's axis, the distance of drawing back as amount of movement, is represented it with negative direction.Its result is divided into curve is shown in Figure 11.

＜table 2 〉

Magnetic piece amount of movement (mm)	-10	-8	-6	-4	-2	0
Magnetic piece amount of movement (mm)	-10	-8	-6	-4	-2	0	YV misconvergence compensation rate (mm)	0.01	0.04	0.09	0.23	0.41	0.49

From this result as can be seen: the amount of movement of guaranteeing the 1st magnetic piece 3A is more than the 10mm, can adjust in the scope near zero compensation rate in maximum compensation rate.

According to these relations, in the structure of deflecting coil, can be transferred to optimum state to the position of the 1st, the 2nd installation portion 4A, the 4B of the 1st, the 2nd

magnetic piece

3A, 3B and the setting of amount of movement.

Especially, the distance L of the 1st, the 2nd

magnetic piece

3A, 3B and unshakable in one's determination 2 is set at below the 2.5mm, simultaneously the amount of movement that can adjust of

magnetic piece

3A, 3B is set at more than the 10mm, can compensate the YV misconvergence, can be not excessive and not enough, make it become optimum structure.

Under the situation of compensation YV misconvergence, must install the a pair of the 1st or the 2nd

magnetic piece

3A, 3B down in the right side or the left side of deflecting coil.And, usually, make this a pair of magnetic piece be configured to state to horizontal axis symmetry (promptly symmetrical up and down), can reach The optimal compensation.But, on one side this adjustment operation will be confirmed the misconvergence state on the monitor picture, Yi Bian the pair of magnetic sheet is installed on the optimum position, so, must move separately respectively and adjust, efficient is extremely low.

Therefore, make the a pair of the 1st or the 2nd

magnetic piece

3A, 3B and resin form an integral body, make molded and shaped body 13 (adjustment component).It is shown in Figure 12.

Make the 1st and the 2nd guide part 6Aa, 6Ab, 6Ba, 6Bb form state parallel to each other, is this adjustment component that molded and shaped body 13 is installed on the 1st or the 2nd installation portion 4A, the 4B, it is overlapped mutually with this guide part 6Aa, 6Ab, 6Ba, 6Bb, pinching connecting portion 13A with hand makes it along sliding on the direction of arrow of this figure, like this, can make that the a pair of the 1st or the 2nd

magnetic piece

3A, 3B are simultaneously parallel symmetrically up and down to be moved (direction of arrow of this figure) and adjust, so operating efficiency improves (referring to Figure 13) greatly.

In the case, the 1st only also can be meant two guide parts that the outside 13a1,13a2 overlap mutually with molded and shaped body 13 with the 2nd guide part, perhaps the guide part that only overlaps mutually with two inboard 13b1,13b2.

The resin that is used for this molded and shaped body 13 is not limited only to be configured as with finance the material of one, also can use for example polypropylene (PP) or sex change polyphenylene oxide (sex change PPE).

Embodiments of the invention are not limited only to said structure, but in the scope that does not break away from main points of the present invention, for example can carry out following change.

The 1st installation portion 4A and the 2nd installation portion 4B can not be arranged on the position overlapped on the CRT tube axis direction yet, and are arranged on nonoverlapping position.

And arbitrary installation portion also all is being set near unshakable in one's determination 2, preferably is arranged near the front end of the 2c1 of foot, 2c2 of this iron core 2.

1st, the 1st, the 2nd guide part 6Aa of the 2nd installation portion 4A, 4B, 6Bb, 6Ba, 6Bb also can form section L font opposite one another, and it can be overlapped mutually with the 1st, the 2nd

magnetic piece

3A, 3B and molded and shaped body 13, can keep easily again.

1st, the material of the 2nd

magnetic piece

3A, 3B is not limited only to silicon steel sheet, as long as can obtain required compensation rate, uses other materials, and for example permalloy and ferrite etc. also can.

And the shape of the 1st, the 2nd

magnetic piece

3A, 3B is not limited only to the rectangle thin slice, also can make arbitrary shape, and the R of Fig. 6, G, B orientation are configured to longitudinally, can reach high efficiency, so, respond well.

Moreover the 1st magnetic piece 3A and the 2nd magnetic piece 3B can not be identical shaped also.

Generally, big magnetic piece, compensation effect is big, so also can make the 1st compensating plate form greatlyyer than the 2nd compensating plate, is respectively applied for coarse compensation and thin compensation.

In the case, when producing deflecting coil, also can carry out the 1st and the 2 two kind of adjustment, the 1st magnetic piece is used for coarse compensation, the 2nd magnetic piece is used for thin compensation.

The effect of invention

As mentioned above, if employing the present invention, then can obtain following effect: in deflection coil, adjustment when the adjustment when compensating the production deflection coil that this YV misconvergence and raster distortion carry out and deflection coil are installed to CRT is upper, both all only install respectively the 1st magnetic piece and the 2nd magnetic piece gets final product in the opposite side of having twined near the leading section unshakable in one's determination of bucking coil path flange side and path flange side. So in the time of reducing number of spare parts and assembler, reach the effect that reduces cost.

And, make adjustment component because with resin the pair of magnetic sheet is connected to an integral body, can make the pair of magnetic sheet simultaneously mobile abreast, so, can obtain the effect of the compensating operation efficient of raising YV misconvergence.

And, because have the 1st installation portion, it has the 1st guide part that is the extension of rib shape in the direction parallel with path flange cardinal principle, can make the 1st magnetic piece or its made adjustment component that included overlapped mutually with this guide part and install, has simultaneously the 2nd installation portion, it has the 2nd guide part that extends into the rib shape in the direction parallel with path flange cardinal principle, can make the 2nd magnetic piece or its made adjustment component that included overlapped mutually with the 2nd guide part and install, so, its effect is: in the time of reducing number of spare parts and assembler, can reduce cost, be easy to simultaneously improve the efficient of adjusting operation.

And, because magnetic piece and interval unshakable in one's determination are set in the 2.5mm, so can obtain YV misconvergence and raster distortion are compensated to the effect of optimum state.

Claims

1. deflecting coil, it has:

Isolate skeleton, it forms funnel-form, has big footpath flange and path flange respectively in big footpath side and path side, on the above-mentioned path flange and on the opposite direction of above-mentioned big footpath side neck cylindraceous is being set;

A pair of frame deflector coil, it is configured in the outside of above-mentioned isolation skeleton;

Bucking coil, it is connected with above-mentioned frame deflector coil; And

A pair of U shaped iron core twines above-mentioned bucking coil on it,

Above-mentioned pair of core is installed in the both sides of above-mentioned neck, neck is clamped in therebetween and makes this leading section unshakable in one's determination be state opposite one another,

It is characterized in that having:

The 1st magnetic piece, it is configured in the above-mentioned path flange side of above-mentioned iron core; And

The 2nd magnetic piece, it is configured in the opposition side of the above-mentioned path flange of above-mentioned iron core,

Above-mentioned the 1st magnetic piece be configured in a plurality of above-mentioned leading sections at least one near, simultaneously, above-mentioned the 2nd magnetic piece be configured in a plurality of above-mentioned leading sections at least one near.

2. deflecting coil according to claim 1, it is characterized in that: above-mentioned the 1st magnetic piece and above-mentioned the 2nd magnetic piece are near the above-mentioned leading section pair of magnetic sheets separately that is configured in opposite one another, utilize resin that this a pair of magnetic piece is connected to an integral body, constitute adjustment component.

3. deflecting coil according to claim 1 is characterized in that:

Near above-mentioned each leading section above-mentioned path flange side has the 1st installation portion, and the 1st installation portion has the 1st guide part that is the extension of rib shape on the direction that parallels with above-mentioned path flange, can make above-mentioned the 1st magnetic piece overlap mutually and install with above-mentioned the 1st guide part,

Near the opposition side of the above-mentioned path flange of while above-mentioned each leading section, has the 2nd installation portion, the 2nd installation portion has the 2nd guide part that is the extension of rib shape on the direction that parallels with above-mentioned path flange, can make above-mentioned the 2nd magnetic piece overlap mutually and install with above-mentioned the 2nd guide part.

4. the described deflecting coil of claim 2 is characterized in that:

Near above-mentioned each leading section above-mentioned path flange side, has the 1st installation portion, the 1st installation portion has the 1st guide part that is the extension of rib shape on the direction that parallels with above-mentioned path flange, can make the adjustment component that comprises above-mentioned the 1st magnetic piece and constitute overlap mutually and install with above-mentioned the 1st guide part

Near the opposition side of the above-mentioned path flange of while above-mentioned each leading section, has the 2nd installation portion, the 2nd installation portion has the 2nd guide part that is the extension of rib shape on the direction that parallels with above-mentioned path flange, can make the above-mentioned adjustment component that comprises the 2nd magnetic piece and constitute overlap mutually and install with above-mentioned the 2nd guide part.

5. the described deflecting coil of each in the claim 1～4, it is characterized in that: during as tube's axis, above-mentioned the 1st magnetic piece or above-mentioned the 2nd magnetic piece and the interval of above-mentioned iron core on the aforementioned tube axis direction remain in the 2.5mm with the direction that runs through above-mentioned neck center.