CN1265651C - Deflecting magnetic yoke device - Google Patents

Deflecting magnetic yoke device Download PDF

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Publication number
CN1265651C
CN1265651C CNB021303258A CN02130325A CN1265651C CN 1265651 C CN1265651 C CN 1265651C CN B021303258 A CNB021303258 A CN B021303258A CN 02130325 A CN02130325 A CN 02130325A CN 1265651 C CN1265651 C CN 1265651C
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CN
China
Prior art keywords
coil
mentioned
diode
broom shape
magnetic yoke
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Expired - Fee Related
Application number
CNB021303258A
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Chinese (zh)
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CN1429029A (en
Inventor
城雄作
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Toshiba Corp
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Toshiba Corp
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Publication of CN1429029A publication Critical patent/CN1429029A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
    • H01J29/706—Deviation correction devices, i.e. having the same action on each beam
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only
    • H01J29/764—Deflecting by magnetic fields only using toroidal windings

Abstract

A deflecting magnetic yoke device is provided, wherein a comatic coil comprises a first comatic coil part (151) corresponding to the top of the picture and a second comatic coil part (152) corresponding to the bottom of the picture. The first and second comatic coil parts include: a series circuit composing a first and second coils (111a, 111c) and a diode; a resistance R1 in parallel connection with any one of the first and second coils and the diode; a series circuit composing a third and fourth coils (111a, 111c) and a diode; a resistance R2 in parallel connection with any one of the third and fourth coils and the diode.

Description

Deflecting magnetic yoke device
Technical field
The present invention relates to be installed in deflecting magnetic yoke device such as in the color cathode ray tube of colored Braun tube and so on.
Background technology
The neck place of the colored Braun tube that uses in television receiver is equipped with deflecting magnetic yoke device.Deflecting magnetic yoke device makes electron gun electrons emitted bundle at level and vertical direction upper deflecting.Thus, electron beam shines on the screen of Braun tube and realizes raster scan.
Fig. 1 is the oblique view that the general picture of existing deflecting magnetic yoke device is shown.Deflecting magnetic yoke device has saddle type horizontal deflection coil (not shown) and directly is wound on frame deflector coil 13 on the ring-shaped core 12.Horizontal deflection coil is disposed at interior all sides of coil separator 14, and frame deflector coil 13 is disposed at the outer circumferential side of coil separator 14.
Coil separator 14 is that a hollow bulb is arranged in the axial direction, and the part that part that the bore in its place ahead is big and rear bore are little has the bobbinet of flange respectively.
In addition, the rearward end at deflecting magnetic yoke device disposes broom shape coil (coma-coil) 15.And, terminal board 16 is installed, as the relay daughter board of connecting coil etc.
Shown in Fig. 2 (A), broom shape coil 15 comprises the 1st broom shape coil portion 151 (comprising coil 15a, 15c) and the 2nd broom shape coil portion 152 (comprising coil 15b, 15d) with same number of turns.Broom shape coil portion 151 is identical with broom shape coil portion 152 structures.
Shown in Fig. 2 (B), the 1st broom shape coil portion 151 is that coil 15a, 15c are wound in bobbinet 5A1 and go up and constitute.Hollow bulb at bobbinet 5A1 has yoke 5B1 to pass.The structure of the 2nd broom shape coil portion 152 is identical.In other words, broom shape coil 15 is to constitute by the 1st broom shape coil portion 151 corresponding with the drawing upside with corresponding the 2nd broom shape coil portion 152 of drawing downside.
In addition, the wire winding layer of 15a, 15c which be the upper strata can, and the wire winding layer of 15b, 15d which is that the upper strata can.
Fig. 3 (A), 3 (B) are the winding diagrams of above-mentioned each coil and electronic unit.Horizontal deflection system shown in Fig. 3 (A), is the structure that is connected with differential coil 17 by horizontal deflection coil 11.Horizontal deflection coil 11 is made of the 11A of portion of saddle coil up and down and the 11B of saddle coil portion of coil separator 14.
Vertical deflection system shown in Fig. 3 (B), is the structure that is connected with broom shape coil 15 by frame deflector coil 13. Coil portion 13A, 13B that frame deflector coil 13 is disposed at the series connection up and down of coil separator 14 respectively constitute.In addition, as utilize the pair of saddle-shaped frame deflector coil, then dispose about this saddle-shape vertical deflection coil as frame deflector coil.
End at frame deflector coil 13 is provided with power supply terminal T1.An end that connects coil 15a, the 15b of broom shape coil 15 at the other end of frame deflector coil 13 jointly.The other end of coil 15a is connected with the end of coil 15d through diode D1 on direction, and the other end of coil 15b is connected with the other end of coil 15d through diode D2 on inverse direction.Resistance R 1, R2 parallel connection are arranged herein, on diode D1, the D2 respectively.The other end of coil 15d is connected with the end of coil 15c.The other end place of coil 15c is provided with power supply terminal T2.
Above-mentioned coil 15a, 15b are also referred to as the YH coil, and the purpose of its setting is for the correcting electronic bundle horizontal misconvergence of other bundle (red, indigo plant) when the sector scanning of the upper and lower of picture particularly.In addition, coil 15d, 15c are also referred to as the VCR coil, and the purpose of its setting is for correcting electronic bundle vertical misconvergence of central beam (green) and other bundle (red, indigo plant) when the region operation of the upper and lower of picture particularly.
In above-mentioned vertical deflection system,, in coil 15a, 15b, there are electric current 5a, 5b to flow through as the YH coil that is connected in parallel as power supply terminal is provided vertical scanning signal.
Fig. 4 illustrates the electric current that flows through among coil 15a, the 15b, how to change in the upper side and the lower side of picture.Solid line represents to flow through the electric current 5a among the coil 15a, and dotted line represents to flow through the electric current 5b of coil 15b.T is a time shaft, and i is current value (A).
When the deflection of picture top, the positive high pressure on the positive power terminal reduced along with the time that applies.At this moment, on the diode D1 forward bias and conducting, on the diode D2 reverse bias and ending.Therefore, coil 15b and resistance R 2 are in series connection.
In addition, when the deflection of picture bottom, positive high voltage supply negative power source terminal, this voltage strengthened along with the time.At this moment, on the diode D2 forward bias and conducting, on the diode D1 reverse bias and ending.Therefore, coil 15a and resistance R 1 are in series connection.
As a result, when the deflection of picture top, the electric current that flows through among the coil 15b of the current ratio lower side that flows through among the coil 15a of upper side is big.At this moment, the coil 15a by upper side forms very big pincushion field.So the result can revise the horizontal misconvergence YH of Y (picture is vertical) axle.
In addition, when the deflection of picture bottom, the electric current that flows through among the coil 15a of the current ratio upper side that flows through among the coil 15b of lower side is big.At this moment, form very big pincushion field, can revise the horizontal misconvergence YH of Y-axis equally by the coil 15b of lower side.(part that is made of YH coil and resistance and diode is called the YH correcting circuit.)
Yet as research in more detail, as can be seen from Figure 4, the difference between current that flows through among the coil 15b of the coil 15a of upside and downside during the deflection of picture top dwindles for picture central portion I1 and picture periphery I2.
This point is exactly that as shown in Figure 5, (blue beam is on a left side, and red beam is on the right side) takes place the horizontal misconvergence YH of Y-axis in the picture upper end.This tendency influences whole image, becomes the reason of image quality deterioration.Shown in Fig. 5 is R from the top view of colored Braun tube screen, G, the part of the vertical direction track of the beam spot of B.As mentioned above, on picture top,, produce misconvergence because electric current electric current 5a, 5b are variant.
Fig. 6 is an another one YH correcting circuit.Comparing with the correcting circuit of Fig. 2, added resistance R 1a, R2a and diode D1a, D2a, is that a target is the circuit that makes the little current waveform shaping of the rising front of diode.In addition, for giving same label with the corresponding part of each element that is shown in Fig. 5.According to this YH correcting circuit,, can't improve the occurrence factor of the misconvergence of picture periphery though offset the poly-certain effect that obtains of lossing at all.
As mentioned above, in existing deflecting magnetic yoke device, existing the electric current of two coil portions of YH correcting circuit to change, is not linear change, particularly produces the problem of misconvergence on picture top.
So, the object of the present invention is to provide the deflecting magnetic yoke device of the horizontal misconvergence of a kind of Y-axis that can prevent relative picture top simple in structure.
Summary of the invention
The present invention, for achieving the above object, the broom shape coil that is connected with frame deflector coil comprises: with corresponding the 1st broom shape coil portion in picture top and with corresponding the 2nd broom shape coil portion in picture bottom, and above-mentioned the 1st, the 2nd broom shape coil portion comprises respectively: series circuit of being made up of the 1st, the 2nd coil and diode and the resistance that is connected in parallel with any and above-mentioned diode in above-mentioned the 1st, the 2nd coil, the direction of the diode in the above-mentioned the 1st and the 2nd broom shape coil portion is opposite.
Description of drawings
Fig. 1 is the oblique view from the general picture of the deflecting magnetic yoke device of rear observation.
Fig. 2 (A) is the oblique view that the coiler part of the broom shape coil that forms Fig. 1 is shown.
Fig. 2 (B) is the cutaway view of the one portion of coiler part that the broom shape coil that forms Fig. 1 is shown.
Fig. 3 (A) is for illustrating the circuit diagram of the line that comprises horizontal deflection coil.
Fig. 3 (B) is for illustrating the circuit diagram of the line that comprises frame deflector coil.
Fig. 4 is the key diagram that the current relationship of the upper coil portion of existing broom shape coil and lower coil portion is shown.
Fig. 5 is the diagrammatic sketch of example of misconvergence that the problem of existing broom shape coil is shown.
Fig. 6 is the diagrammatic sketch of another example that the YH correcting circuit of existing broom shape coil is shown.
Fig. 7 is the circuit diagram that one embodiment of the present invention is shown.
Brief strabismus map when Fig. 8 constructs as coiler part for each coil portion of the YH correcting circuit of Fig. 7 circuit.
Fig. 9 is the diagrammatic sketch that the current relationship of the upside coil portion of broom shape coil of the present invention and downside coil portion is shown.
Figure 10 is the circuit diagram that another embodiment of the present invention is shown.
Figure 11 is the diagrammatic sketch of the general picture of the structure of coil portion during specifically as coiler part that YH correcting circuit shown in Figure 10 is shown.
Embodiment
Utilize accompanying drawing that embodiments of the present invention are illustrated below.
Fig. 7 illustrates one embodiment of the present invention.Terminal T1 is connected with an end of frame deflector coil 13.The 1st a coil 111a of broom shape coil 100 and the end of the 3rd coil 111b are connected in the other end of frame deflector coil 13 jointly.The other end of coil 111a is connected with the end of the 2nd coil 111c through diode D1 on forward direction.And the other end of the 2nd coil 111c is connected with the end of coil 111f.
The other end of the 3rd coil 111b is connected with the end of the 4th coil 111d through diode D2 on inverse direction.The other end of the 4th coil 111d is connected with the end of coil 111f.
Herein, to the series circuit of diode D1 and the coil 111c resistance R 1 that is connected in parallel.And, to the series circuit of diode D2 and the coil 111d resistance R 2 that is connected in parallel.
The other end coils 111e of the coil 111f of front is connected with terminal T2.
Above-mentioned coil 111a, 111b, 111c, 111d are called the YH coil, the purpose of its setting be for the correcting electronic bundle particularly on the top of picture, the horizontal misconvergence of other bundle (red, indigo plant) during lower area scanning.In addition, coil 111f, 111e are called the VCR coil, the purpose of its setting be for the correcting electronic bundle particularly on the top of picture, central beam (green) and other vertical misconvergence of restrainting (red, indigo plant) during the lower area operation.
In Fig. 8, the parts when above-mentioned each coil is shown as the 1st, the 2nd broom shape coil portion 151,152 formations.It is corresponding with the picture upside that the 1st broom shape coil portion 151 is installed on the flange part at deflection yoke rear, and that the 2nd broom shape coil portion 152 is installed on the flange part at deflection yoke rear is corresponding with the picture downside.This installment state as shown in Figure 1.Coiling 111a on the 1st broom shape coil portion 151,111c, 111e, and on the 2nd broom shape coil portion 152 coiling 111b, 111d, 111f.So each diode, resistance are installed on as shown in Figure 1 the terminal board 16, become connection as shown in Figure 7.
In addition, in the 1st, the 2nd broom shape coil portion 151,152, the order of the wire winding layer of each coil is not particularly limited.In this example, be 3-tier architecture (particularly Rao Xian order difference), it is configured to the 1st layer is coil 111e, 111f as the VCR coil, the 2nd layer is the 1st coil 111a, the 111b as the YH coil, and the 3rd layer be the 2nd coil 111c, the 111d as the YH coil, and coiling forms separately respectively.
Action to the broom shape coil of above-mentioned formation is illustrated below.Because when the deflection of picture top, the flow direction of electric current on figure is from left to right, and the electric current I v that flows through frame deflector coil 13 is divided into: flow through as the electric current I u of the coil 111a of the 1YH coil on top and flow through electric current I d as the coil 111b of the 1YH coil of bottom.
In addition, electric current I u is divided into: flow through as the electric current I ud of the coil 111c of the 2YH coil on diode D1 and top and flow through the electric current I ur of resistance R 1.On the other hand, electric current I d flows through the 111d as the 2YH coil of diode D2 and bottom hardly, but flows through resistance R 2 as electric current I dr.
As a result, the electric current that flows through among coil 111b, the 111d of the current ratio lower side that flows through among coil 111a, the 111c of the upper side of diode D1 conducting is big.
Generally, when having rapid electric current to flow through, can produce back electromotive force in coil, when vertical scanning proceeds to the picture lower end and returns initial condition, produce back electromotive force in frame deflector coil, this back electromotive force puts on circuit as pulse voltage.In the moment that the pulse voltage that causes at back electromotive force applies, in the deflection of picture upper end, make the influence that produces back electromotive force among coil 111a～111f big in other words.Therefore, though all produce back electromotive force in each coil, in fact as back electromotive force, influencing big is because the counter electromotive force current of the coil 111d of the back electromotive force of the coil 111b of the lower side of the influence of diode and lower side.
Therefore, when the deflection of picture upper end, increase direction at electric current I u, d reduces direction in electric current I, is subjected to the influence of counter electromotive force current, and as shown in Figure 9, in the upper end region of picture, it is big that difference between current I3 becomes.In Fig. 9, the electric current that will flow through the coil portion 111a of upper side illustrates as electric current 11a, and the electric current that will flow through the coil portion 111b of lower side illustrates as electric current 11b.T is a time shaft.I is current value (A).
As a result, YH proofreaies and correct and becomes linearity, can not occur in the local misconvergence YH of picture upper end.In addition, when the deflection of picture bottom,, can almost be that linear YH coil is proofreaied and correct because can not be subjected to the influence of these back electromotive force, can realize good convergence performance in whole image.
In other words, because utilize this convergence correction circuit, but the current waveform of convection current overcorrect coil carries out shaping, and the magnetic field that correcting coil produces is put in order, can obtain good convergence performance in whole image.
In the above-described embodiment, frame deflector coil and VCR coil are in the state of being connected in series describe, these coils also can be used in the occasion that is connected in parallel.In addition, can be used for connecting other coils and element etc. too.Also have, shown in Figure 1 be the direct frame deflector coil of the annular vertical deflecting coil of coiling on iron core, describe as its YH correcting circuit, but the present invention is applicable to the occasion of saddle-shape vertical deflection coil too.
The invention is not restricted to above-mentioned execution mode.
Figure 10 illustrates another execution mode of broom shape coil.
Terminal T1 is connected with an end of frame deflector coil 13.The other end of frame deflector coil 13 is connected with the anode of diode D1, an end of resistance R 1, the negative electrode of diode D2, an end of resistance R 2.The negative electrode of diode D1 is connected with terminal T2 through series coil 112c, 112a, 112f, 112e.In addition, the other end of resistance R 1 is connected with the tie point of coil 112c, 112a.The anode of diode D2 is connected with the tie point of coil 112a, 112f through series coil 112b, 112d.The other end of resistance R 2 is connected with the tie point of coil 112b, 112d.
Above-mentioned coil 112c, 112a, 112e form and corresponding the 1st broom shape coil portion 151 of picture upper side, and coil 112b, 112d, 112f form and corresponding the 2nd broom shape coil portion 152 of picture lower side.
The general picture of the 1st broom shape coil portion 151 shown in Figure 11.Herein, the occasion making coil portion 112c, 112a is provided with centre tap TP, and as continuous coiling 112c, 112a, the 1st broom shape coil portion 151 is made easily.
In other words, in this example, be when the number of turns of regulation is walked around in coiling, form coil 112a, then guarantee as tapped lead-out wire, then wind the line again and form coil 112c.The centre tap part is connected with resistance R 1.The making of the 2nd broom shape coil portion 152 of opposite side is identical therewith.Thus, because centre tap (2 coil terminals simultaneously) can be connected with the terminal of terminal board, the manufacturing of broom shape coil and the assembling work of deflection yoke are easy.
In above-mentioned broom shape coil, same with the execution mode of front, can reduce picture upper area misconvergence.In this execution mode, because the effect of the back electromotive force of coil, the electric current that flows through coil 112a, 112b is being linear change from picture central authorities to picture top, also can obtain difference between current I3 shown in Figure 9.
As mentioned above, according to the present invention, can utilize a kind of simple structure to prevent the horizontal misconvergence of Y-axis on relative picture top.

Claims (7)

1. deflecting magnetic yoke device is characterized in that:
The broom shape coil that is connected with frame deflector coil comprises: with corresponding the 1st broom shape coil portion in picture top and with corresponding the 2nd broom shape coil portion in picture bottom, and
Above-mentioned the 1st, the 2nd broom shape coil portion comprises respectively:
The series circuit of forming by the 1st, the 2nd coil and diode and
With the resistance that any and above-mentioned diode in above-mentioned the 1st, the 2nd coil is connected in parallel, the direction of the diode in the above-mentioned the 1st and the 2nd broom shape coil portion is opposite.
2. the deflecting magnetic yoke device of putting down in writing as claim 1 is characterized in that: get centre tap between above-mentioned the 1st, the 2nd coil that forms the above-mentioned the 1st and the 2nd broom shape coil portion, and wind the line continuously.
3. the deflecting magnetic yoke device of putting down in writing as claim 1 is characterized in that: above-mentioned frame deflector coil is an annular.
4. the deflecting magnetic yoke device of putting down in writing as claim 1, it is characterized in that: above-mentioned frame deflector coil is a saddle type.
5. the deflecting magnetic yoke device of putting down in writing as claim 1 is characterized in that:
The series circuit that comprises in the above-mentioned the 1st and the 2nd broom shape coil portion is respectively the series circuit that is connected in sequence by the 1st coil, diode and the 2nd coil.
6. the deflecting magnetic yoke device of putting down in writing as claim 1 is characterized in that:
The series circuit that comprises in the above-mentioned the 1st and the 2nd broom shape coil portion is respectively the series circuit that is connected in sequence by diode, the 1st coil and the 2nd coil.
7. the deflecting magnetic yoke device of putting down in writing as claim 1 is characterized in that:
Above-mentioned frame deflector coil is configured in the neck place of colored Braun tube;
Above-mentioned the 1st coil and above-mentioned diode are formed series circuit, and this series circuit is in parallel with above-mentioned resistance,
Above-mentioned the 2nd coil is connected with the above-mentioned series circuit of being made up of above-mentioned the 1st coil and above-mentioned diode, produces back electromotive force when above-mentioned frame deflector coil is applied the pulse voltage of regulation, proofreaies and correct the electric current of above-mentioned the 1st coil.
CNB021303258A 2001-12-28 2002-08-16 Deflecting magnetic yoke device Expired - Fee Related CN1265651C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001401106A JP3557190B2 (en) 2001-12-28 2001-12-28 Deflection yoke device
JP401106/2001 2001-12-28

Publications (2)

Publication Number Publication Date
CN1429029A CN1429029A (en) 2003-07-09
CN1265651C true CN1265651C (en) 2006-07-19

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Application Number Title Priority Date Filing Date
CNB021303258A Expired - Fee Related CN1265651C (en) 2001-12-28 2002-08-16 Deflecting magnetic yoke device

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JP (1) JP3557190B2 (en)
KR (1) KR100508257B1 (en)
CN (1) CN1265651C (en)
TW (1) TW588555B (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100342417B1 (en) * 2000-06-24 2002-07-02 이형도 Correction device of miss-convergence for deflecting yoke

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Publication number Publication date
JP3557190B2 (en) 2004-08-25
CN1429029A (en) 2003-07-09
KR100508257B1 (en) 2005-08-18
JP2003203584A (en) 2003-07-18
KR20030057272A (en) 2003-07-04
TW588555B (en) 2004-05-21

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Granted publication date: 20060719