CN1534714A - Deflecting coil device and display using the same - Google Patents
Deflecting coil device and display using the same Download PDFInfo
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- CN1534714A CN1534714A CNA2004100072434A CN200410007243A CN1534714A CN 1534714 A CN1534714 A CN 1534714A CN A2004100072434 A CNA2004100072434 A CN A2004100072434A CN 200410007243 A CN200410007243 A CN 200410007243A CN 1534714 A CN1534714 A CN 1534714A
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Abstract
A vertical deflecting coil is divided into two pairs of 1st coil parts for pincushion magnetic field production and 2nd coil parts for barrel magnetic field production, and toroidally wound around a core. Two diodes which are connected to the 1st coil parts in parallel while having the opposite polarities are connected in series and turned off in the center area of a screen to suppress production of a pincushion magnetic field, thereby emphasizing a barrel magnetic field. Further, deflecting currents to the 1st coil parts and 2nd coil parts are set nearly equal in the beginning of a vertical scan.
Description
Technical field
The present invention relates to a kind of improvement of deflecting coil, for example be used for the cathode ray tube of color TV set or color monitor.The invention still further relates to a kind of display that uses this deflecting coil.
Background technology
As everyone knows, deflecting coil is at the electron beam R (redness) corresponding to three Essential colour, G (green) and the B (blueness) of level and the emission of vertical direction reflection electronic rifle, so that controlling electron beam R, G, B make each electron beam scan in certain path, fluorescent surface upper edge.
Deflecting coil comprises a tapered substantially separator, the frame deflector coil of flowing through and being arranged on inboard horizontal deflection coil and being arranged on the outside with the synchronous zigzag deflection current of level and vertical cycle, thereby generation magnetic field, so that each electron beam R, G, B are by magnetic core logical circuit deflection.
In addition, know that usually, the electron beam of color cathode ray tube that comprises an array type electron gun is when being deflected, electron beam R, B produce at screen middle part and are just intersecting misconvergence (CROSSMIS-CONVERGENCE), on screen/and lower portion produces the negative misconvergence that intersects.
In addition,, proposed various schemes before this, made the crisscross counter-rotating of screen middle part and last/lower portion exactly in order to proofread and correct such misconvergence.Yet in these schemes, positive and negative intersection misconvergence can not fully be eliminated, and produces a problem, is exactly nubbin to occur proofreading and correct.
Especially, when being used to of having proposed recently, the mainstream technology of proofreading and correct positive and negative intersection misconvergence was applied to the deflecting coil of planar coloured cathode ray tube, can not eliminate misconvergence fully, and the shortcoming that exists is to have the remaining misconvergence that is corrected at the screen middle part.
Summary of the invention
The present invention makes under the above-mentioned situation having considered, the purpose of this invention is to provide a kind of deflecting coil, and this device can be corrected to enough realistic scales to misconvergence, and does not produce the big nubbin that is corrected, and the display that uses this device is provided.
According to an aspect of the present invention, provide a kind of deflecting coil that is connected to cathode ray tube, it is characterized in that comprising: one is tapered coil separator substantially; One is arranged on the horizontal deflection coil in this coil separator; The one coaxial outer iron core of this coil separator that is arranged on; One frame deflector coil, comprise: first coiler part and second coiler part, it is made of first coiler part a secondary coil, this secondary coil around the upper and lower end parts of iron core around, and it is mutually opposed by a horizontal center line, this horizontal center line is divided into equal two parts to the screen of cathode ray tube in vertical direction, second coiler part is made of a secondary coil, this secondary coil around the left and right end portions of iron core around, and opposed mutually by a vertical center line, this vertical centre bundle of lines cathode ray tube is divided into equal two parts in the horizontal direction; With a vertical deflection circuit, the 4th circuit wherein comprises a secondary coil that constitutes the series connection of second coiler part, the 4th circuit is in parallel with tertiary circuit, tertiary circuit is in series by first circuit and second circuit, first circuit comprises a secondary series coil that constitutes first coiler part, second circuit comprises first and second diodes, this two diode is connected in parallel with opposite polarity, wherein, the effective value of deflection current that flow into to constitute a secondary coil of first coiler part equals to flow into the effective value of the deflection current of a secondary coil that constitutes second coiler part substantially, and continues a predetermined period when vertical deflection begins.
According to a further aspect in the invention, provide a kind of display, it is characterized in that comprising: the importation that a vision signal is transfused to; One deflection current produces part, and this part is that the basis produces deflection current with the synchronizing signal, and this synchronizing signal is that the incoming video signal from the importation takes out; One deflecting coil part, this device comes deflection beam by the deflection current generation magnetic field that deflection current produces the part generation; With a cathode ray tube, the magnetic core logical circuit deflection electron beam that it produces with deflecting coil, video shows the vision signal of importation, this deflecting coil part branch comprises: a tapered substantially coil separator; One is arranged on the horizontal deflection coil in this coil separator; The one coaxial outer iron core of this coil separator that is arranged on; One frame deflector coil, comprise: first coiler part and second coiler part, it is made of first coiler part a secondary coil, this secondary coil around the upper and lower end parts of iron core around, and it is mutually opposed by a horizontal center line, this horizontal center line is divided into equal two parts to the screen of cathode ray tube in vertical direction, second coiler part is made of a secondary coil, this secondary coil around the left and right end portions of iron core around, and opposed mutually by a vertical center line, this vertical centre bundle of lines cathode ray tube is divided into equal two parts in the horizontal direction; With a vertical deflection circuit, the 4th circuit wherein comprises a secondary coil that constitutes the series connection of second coiler part, the 4th circuit is in parallel with tertiary circuit, tertiary circuit is in series by first circuit and second circuit, first circuit comprises a secondary series coil that constitutes first coiler part, second circuit comprises first and second diodes, this two diode is connected in parallel with opposite polarity, wherein, the effective value of deflection current that flow into to constitute a secondary coil of first coiler part equals to flow into the effective value of the deflection current of a secondary coil that constitutes second coiler part substantially, and continues a predetermined period when vertical deflection begins.
Description of drawings
Fig. 1 is the front view of the TV-set broadcasting receiver of expression explanation one embodiment of the invention;
Fig. 2 is the block diagram of the signal processing system of broadcast television receiver among the expression embodiment;
Fig. 3 is the outline drawing of deflecting coil part among the embodiment.
Fig. 4 is the sectional view that the frame deflector coil of deflecting coil part among the expression embodiment twines state;
Fig. 5 is the circuit diagram of expression to the vertical deflection circuit of the frame deflector coil supply vertical yoke current of embodiment;
Fig. 6 is the figure of vertical isotropism astigmatism (ISOTROPICASTIGMATISM) among the expression embodiment;
Fig. 7 is the figure of vertical isotropism astigmatism among the expression embodiment;
Fig. 8 is the figure that expression isotropism astigmatism has been corrected situation in an embodiment;
Fig. 9 is that vertical intelligent shape differs the figure of (COMA ABERRATION) among the expression embodiment;
Figure 10 is that vertical intelligent shape differs the figure that is corrected situation among the expression embodiment;
Figure 11 is the oscillogram that deflection current flows into first coiler part of frame deflector coil among the expression embodiment;
Figure 12 is the oscillogram that deflection current flows into second coiler part of frame deflector coil among the expression embodiment;
Figure 13 is the figure that the misconvergence of horizontal direction among the expression embodiment has been corrected;
Figure 14 is the figure that expression has the positive and negative intersection misconvergence that produces in the deflecting coil now;
Figure 15 represents on the screen in the prior art/the bearing calibration figure that just intersects misconvergence of bottom;
Figure 16 represents on the screen in the prior art/the bearing calibration figure of the negative intersection misconvergence of bottom;
Figure 17 is an oscillogram of representing a coiler part of the frame deflector coil of deflection current inflow in the prior art;
Figure 18 is an oscillogram of representing another coiler part of the frame deflector coil of deflection current inflow in the prior art;
Figure 19 represents the horizontal direction misconvergence that produces in the prior art.
Embodiment
One embodiment of the invention are described below with reference to the accompanying drawings.Fig. 1 is the front view of expression example TV-set broadcasting receiver 11 states of the present invention.This TV-set broadcasting receiver 11 mainly is made of the supporting seat 13 of rack 12 and this rack 12 of support.
In this structure, the screen of cathode ray tube (CRT) 14 is arranged on the forward, central part of rack 12.In addition in rack 12, the operation information that mains switch 15 and accepting sends from Digiplex accept part 16, be set at the both sides of CRT 14 screens.
On the other hand, supporting seat 13 is rotatably connected with the middle part, bottom surface of rack 12, and the structure of supporting seat can raise it, and supports rack 12 like this, and promptly supporting seat is installed on the horizontal plane of a predetermined estrade.
Fig. 2 represents the signal processing system of this TV-set broadcasting receiver 11.That is to say that the television broadcasting signal of being accepted by antenna 18 is transfused to tuner pack 19.This tuner pack 19 is selected desirable TV signal from the television broadcasting signal of input.
In addition, tuner pack 19 is selected TV signal input video demodulation process part 20 and synchronization detecting section 21.Wherein, video demodulator part 20 is taken out video component from the TV signal of input, this component is carried out demodulation process, then this component is outputed to CRT 14 by drive part 22.
In addition, synchronization detecting section 21 is taking-up level and vertical synchronization component from the TV signal of input, and this component is outputed to deflection current generation part 23.Deflection current produces part 23 generation level and vertical yoke current from the level of input and vertical synchronization component, and an electric current that produces is outputed to deflecting coil part 24, and deflecting coil part 24 is connected with the neck 14a of CRT 14.
In addition, be deflected current generation section and divide the level of 23 outputs and level and the frame deflector coil that vertical component is transfused to the deflecting coil part 24 that will describe the back respectively, therefore, the vision signal of drive part 22 outputs is presented on the CTR 14 by video.
Fig. 3 represents the profile of deflecting coil part 24.In other words, tapered iron core 27 both ends opens are set at the outside of coil separator 25, and a frame deflector coil 26 is looped around on the iron core with the shape of annular.
In addition, become saddle around horizontal deflection coil 28 be arranged in the coil separator 25.Also have, the minor diameter opening of coil separator 25 is connected to the neck 14a of CRT 14 by connecting band 29.
Fig. 4 represents that the radiation direction with electron beam meets at right angles and dissects resulting sectional view.That is to say that the annular iron core 27 that is used for frame deflector coil is arranged on the outside of coil separator 25 coaxially, and frame deflector coil 26 is with the shape wound core 27 of annular.Horizontal deflection coil 28 is arranged in the coil separator 25 with saddle type.
Here, frame deflector coil 26 is by constituting with the lower part: one first coiler part 30, it comprises a secondary coil by the going up relatively of axis X wound core 27/following two ends, and axis X is that CRT 14 screens are divided equally into two-part horizontal center line axis in vertical direction; One second coiler part 31, it comprises a secondary coil at a left side/right two ends relatively by axis Y wound core, axis Y is divided equally into two-part vertical centre axis in the horizontal direction to CRT 14 screens.
In addition, first coiler part 30 is made of coil 30a and 30b, and coil 30a is looped around the upper end of iron core 27 with respect to axis Y symmetrically with a predetermined open-angle, and coil 30b is looped around the lower end of iron core 27 symmetrically with respect to axis Y with identical open-angle.That is to say the symmetric shape that coil 30a, 30b difference wound core 27 forms with respect to central axis.
In addition, second coiler part 31 is made of coil 31a and 31b, and coil 31a is looped around the left end of iron core 27 with respect to axis X symmetrically with a predetermined open-angle, and coil 31b is looped around the right-hand member of iron core 27 symmetrically with respect to axis X with identical open-angle.That is to say the symmetric shape that coil 31a and 31b difference wound core 27 form with respect to central axis.
In addition, coil 31a, the 31b that constitutes second coiler part 31 around angular range be to be no more than 50 degree with respect to axis X in vertical direction.The coil 30a, the 30b that constitute first coiler part 30 spend in the angular range of 90 degree 50 in vertical direction with respect to axis X respectively.
Fig. 5 represents an embodiment of vertical deflection circuit 32, and this circuit is to the frame deflector coil 26 supply vertical yoke currents of deflecting coil part 24.That is to say that terminal 33 is connected to the end of the coil 30a that constitutes first coiler part 30 and an end of resistance 34.
In addition, the other end of coil 30a is connected to the other end of resistance 34, and their common tie point is connected to the end of the coil 30b that constitutes first coiler part 30 and an end of resistance 35.
In addition, the other end of coil 30b is connected to the other end of resistance 35, and their common tie point is connected to the negative electrode of the anode of diode 36, diode 37 and an end of resistance 38.
In addition, the negative electrode of diode 36 is connected to the anode of diode 37 and the other end of resistance 38.That is to say that coil 30a that is connected in series and 30b and opposite direction diode connected in parallel 36,37 are connected in series.
On the other hand, terminal 33 is connected to the end of the coil 31a that constitutes second coiler part 31 and an end of resistance 39.Also have, the other end of coil 31a is connected to the other end of resistance 39, and their points of common connection is connected to the end of the coil 31b that constitutes second coiler part 31 and an end of resistance 40.
In addition, the other end of coil 31b is connected to the other end of resistance 40, and their points of common connection is connected to the negative electrode of diode 36, the anode of diode 37 and the other end of resistance 38.
Further, the negative electrode of diode 36, the anode of diode 37, the other end of resistance 38, the other end of the other end of coil 31b and resistance 40 are connected to an end of resistance 41 and the anode of diode 42.The other end of resistance 41 is connected to the negative electrode of diode 42, and their points of common connection is connected to an end of a vertical isotropism astigmatism correction coil 43.
In addition, the tie point of the other end of the other end of the other end of the anode of the negative electrode of diode 36, diode 37, resistance 38, coil 31b and resistance 40 is connected to an end of resistance 44 and the negative electrode of diode 45.The other end of resistance 44 is connected to the anode of diode 45, and their points of common connection is connected to an end of vertical isotropism astigmatism correction coil 46.
In addition, the other end of vertical isotropism astigmatism correction coil 43 is connected to the other end of vertical isotropism astigmatism correction coil 46, and their points of common connection is connected to terminal 49 by the coma correction coil 47,48 of series connection.
Directly apply a vertical deflection voltage in terminal 33 and 49.Apply a voltage in terminal 33, this voltage reduces to the screen middle part gradually at the starting point of vertical deflection the first half the highest (screen upside), and final vanishing (reference voltage).In the case, terminal 49 is connected to the reference potential point, and vertical yoke current flows to terminal 49 from terminal 33.So terminal 33 is so-called high-end.
In addition, apply a voltage in terminal 49, this voltage changes, so as after vertical deflection the starting point of half (screen bottom side) minimum (reference potential), the highest in the bottom of screen.In the case, terminal 33 is connected to the reference potential point, and vertical yoke current flows to terminal 33 from terminal 49.So terminal 49 is so-called low sides.
Here, vertical isotropism astigmatism correction coil 43,46 is connected near the opening of the deflecting coil part 24 of CRT neck 14a side by coil separator 25, proofreaies and correct the vertical isotropism astigmatism that produces on the axis Y direction of screen CRT 14.
Shown in Fig. 6 and 7, vertical isotropism astigmatism is that amassing wealth by heavy taxation of producing in this manner deviated from.This mode electron beam R, B on screen/lower end is separated from each other in the axis X direction, and the magnetic field correction that is produced by vertical isotropism astigmatism correction coil 43,46.
That is to say since vertical deflection voltage on screen/the lower end height, diode 42,45 is in out state, the electric current that flows in vertical isotropism astigmatism correction coil 43,46 just increases.So the electromagnetic field that vertical isotropism astigmatism correction coil 43,46 produces just strengthens, to proofread and correct vertical isotropism astigmatism.So as shown in Figure 8, electron beam R, B overlap substantially in axis Y direction.
In addition, near the deflecting coil part 24 the neck 14a opening that coma correction coil 47,48 is connected at screen CRT 14 by coil separator 25 produces a pincushion field, proofreaies and correct the commatic aberration that produces on the axis X of screen CRT 14.
As shown in Figure 9, vertical commatic aberration is that amassing wealth by heavy taxation of producing in this manner deviated from, electron beam G is positioned at the inboard of axis Y direction with respect to electron beam R, B, proofreaied and correct by the pincushion field that vertical coma correction coil 47,48 produces, so that electron beam G overlaps with electron beam R, B basically, as shown in Figure 10.
Below, will describe the effect of frame deflector coil 26 in detail.Now hypothesis applies a zigzag vertical deflection voltage, as shown in Figure 5 between the terminal 33,49 of vertical deflection circuit 32.Then, when the value level that has when vertical deflection voltage was corresponding with the middle part of screen CRT 14, diode 36,37 one-tenth off status, vertical yoke current were difficult for flowing at first coiler part 30, and mainly flow at second coiler part 31.
In addition, on vertical deflection voltage value level and CRT 14 screens middle part/when the lower end is corresponding, diode 36,37 one-tenth off status, vertical yoke current all flows at first coiler part 30 and second coiler part 31.
In addition, during diode 36,37 one-tenth off status, electric current does not flow at first coiler part 30, produces the pincushion field, so the cydariform magnetic field that second coiler part 31 produces is strengthened, so the just intersection misconvergence at screen middle part is proofreaied and correct.
In addition, on the screen/the negative intersection misconvergence of bottom is corrected in diode 36,37 one-tenth pincushion fields that produce during opening state by first coiler part 30.
Here, in the present embodiment, the electric current that flows in first coiler part 30 and second coiler part 31 is provided with like this, and promptly in a scheduled period of rise from vertical deflection at least (), effective value (RMS) is basic to be equated mutually.
That is to say, constitute every secondary coil 30a of first coiler part 30, the winding quantity of 30b, constitute every secondary coil 31a of second coiler part 31, the winding quantity of 31b, or various circuit constants, as respectively with the resistance of coil 30a, 30b, 31a, 31b parallel resistor 34,35,39 and 40, with with the resistance of diode 36,37 parallel resistor 38, be the basis decision with the logical value, this logical value obtains from the predetermined party formula or from the measured value that experiment obtains.Therefore, electric current is arranged in such a way, and promptly the deflection current that flows in first coiler part 30 and second coiler part 31 is equal substantially.
For example, about second coiler part 31, the quantity of each winding is set like this, various circuit constants of resistance 39,40 etc. and the vertical yoke current of passing through are even the just intersection misconvergence at screen middle part is proofreaied and correct fully.
In addition, for first coiler part 30, each winding quantity of resistance 34,35 or various circuit constants etc. are provided with like this, even its current effective value is substantially equal to flow into the effective value of the vertical yoke current of second coiler part 31.
Therefore, the electric current shown in Figure 11 flows into first coiler part 30, and electric current shown in Figure 12 flows into second coiler part 31.That is to say that effective value is that 0.49 (A) and p-p value are that the electric current of 0.79 (A) flows into first coiler part 30, effective value is that 0.5 (A) and p-p value are that the electric current of 0.85 (A) flows into second coiler part 31.
When the electric current shown in Figure 11 and 12 flows into first coiler part 30 and second coiler part 31, demonstrate optimum value mutually in pincushion field and the cydariform magnetic field of vertical deflection rising stage, the misconvergence in the screen upper end is able to accurate correction, as shown in figure 13.
Have been noted that, the quantity of winding separately of coil 30a, the 30b of first coiler part 30, the quantity of winding separately of coil 31a, the 31b of second coiler part 31, respectively with the resistance of coil 30a, 30b, 31a, 31b parallel resistor 34,35,39 and 40, it is primary research object, be then, the quantity of winding separately of coil 31a, the 31b of second coiler part 31 is less than the quantity of winding separately of coil 30a, the 30b of first coiler part 30, and the series connection resistance of resistance 39,40 is less than the series connection resistance of resistance 34,35.
On the other hand, existing deflecting coil is different from the embodiment of foregoing description, existing frame deflector coil 26 is without separating into first and second coiler parts 30,31, and frame deflector coil around be arranged on the outer iron core position ring of coil separator around, on this iron core position and the screen/lower end is corresponding.
Generally speaking, when the electron beam of the color cathode ray tube that comprises in-line arrangement (IN-LINE) electron gun is deflected, produce the misconvergence tendency shown in Figure 14 in existing deflecting coil.
That is to say that the upside of the irradiation position of electron beam R in zone 1 becomes the clockwise direction rotation, this zone 1 is the middle part of screen.So, in the right side area of screen away from axis Y, the irradiation position of electron beam R with respect to the irradiation position of electron beam B near axis X, and the screen left field away from the direction of axis Y on away from axis X move.
In addition, the downside of the irradiation position of electron beam B in zone 1 becomes the clockwise direction rotation, and this zone 1 is the middle part of screen.So in the right side area of screen away from axis Y, the irradiation position of electron beam B moves with respect to the irradiation position away from axis X of electron beam R, and move along direction on away from the direction of axis Y near axis X in the screen left field.That is to say, produced positive intersection misconvergence.
Moreover, in zone 2, on this zone screen/downside, the irradiation position of electron beam B becomes the clockwise direction rotation at upside, and the irradiation position of electron beam R becomes the clockwise direction rotation at downside, has just produced so-called negative intersection misconvergence.
By this way, since electron beam R, B cross (CROSS) direction the zone 1 at screen middle part and on/zone 2 of downside produces counter-rotating, so misconvergence is difficult for being corrected, had proposed various schemes for this reason.
For example, the scheme that has is: when cydariform trend appearred in the horizontal magnetic field middle part, the just intersection in zone 1 was improved especially.In addition, zero-bit part (NULL PORTION) is set at least one among level and frame deflector coil, winding is not arranged in the scope at axis X inclination 35 degree angles and (is equivalent near the screen bight) in this part, and the negative intersection misconvergences in the zone 2 are improved.
That is to say, as shown in figure 15, when cydariform trend appears in the horizontal magnetic field middle part, electron beam R stands bigger upward to the screen power (FORCE OF A SCREEN) (long-range navigation thatch power LORENTZ FORCE) of (+Y direction) with respect to electron beam B at first quartile, electron beam R stands the screen power of bigger downward direction (Y direction) with respect to electron beam B at four-quadrant.Electron beam B stands bigger+Y direction power and electron beam B at second quadrant and accepts bigger-Y direction power at third quadrant with respect to electron beam R with respect to electron beam R.This phenomenon occurs in zone shown in Figure 14 1 significantly, and the just intersection misconvergence in zone 1 finally is improved.
In addition, the zero-bit part is set in frame deflector coil, winding is not arranged in the scope at axis X inclination 35 degree angles in this part.So, as shown in Figure 16, power FB＞FR that electron beam B stands at first and four-quadrant of screen, power FR＞FB that electron beam R stands at second and third quadrant of screen.This phenomenon occurs in zone shown in Figure 14 2 significantly, and the negative intersection misconvergence in zone 2 is improved.
Yet the existing scheme of foregoing description is just regulated Distribution of Magnetic Field simply, can not intersect misconvergence to positive and negative and eliminate enough realistic scales.
In order to address the above problem, a kind of prior art is also proposed, wherein, frame deflector coil is divided into two secondary two groups, and constitute by two coiler parts, a part of coil becomes 0-60 degree angle with respect to axis X range ring around so that produce cydariform magnetic field, another part coil with respect to axis X become 60-90 degree square ring around so that produce the pincushion field.In addition, be connected in series, and the signal voltage value that diode is fed to frame deflector coil opens or closes with the diode of opposite polarity parallel connection/connection and the coiler part that produces the pincushion field.
According to this scheme, the voltage that feeds to frame deflector coil reduces to the screen middle part gradually at deflection starting point (screen upside) height, in screen middle part vanishing.After this, to feeding to the voltage of frame deflector coil, polarity inversion, and voltage increases gradually.At deflection end point (screen downside), voltage is identical with the value of starting point, but polarity is opposite.
So diode is closed near the screen middle part, the pincushion field of generation is restrained, and produces the main effect of coiler part performance in cydariform magnetic field, and cydariform magnetic field is strengthened.So, be improved at the just intersection misconvergence in screen middle part (zone 1).
In addition, diode on screen/downside opens, the coiler part that produces the pincushion field also plays a role, on the screen/the negative intersection misconvergence of lower portion (zone 2) is improved.
In addition, in such scheme, composition is like this conversion, that is, to a coiler part on screen/lower portion produces the pincushion field, and stops the generation of pincushion field at the middle part of screen.Generally speaking, whole misconvergence is proofreaied and correct by the combination in the cydariform magnetic field that produces with another coiler part.So it is important that the pincushion field is combined with cydariform magnetic field.
Yet deflection current shown in Figure 17 flows at the coiler part that produces cydariform magnetic field, and the effective value big 30% of the electric current that the current ratio of tool effective value as shown in figure 18 is shown in Figure 17 or more electric current flow at the coiler part that produces the pincushion field.Under such setting, the coiler part that produces cydariform magnetic field the electric current of vertical deflection rising stage be 0.5 (A) (p-p), the corresponding electric current in the coiler part that produces the pincushion field be 1.59 (A) (p-p).
That is to say that peak value (PROTRUDING) electric current that flows into the coiler part that produces cydariform magnetic field reaches 60% with the difference that peak value (PROTRUDING) electric current that flows into the coiler part that produces the pincushion field has.On the contrary, the deflection current that flows at the coiler part that produces cydariform magnetic field diminished in the vertical deflection rising stage.
So the pincushion field of produce strengthening in the vertical deflection rising stage produces positive misconvergence in the horizontal direction at the upper portion (electron beam R is positioned at respect to electron beam B under the state in left side) of screen, as shown in figure 19.
On the other hand, in the above-described embodiments in the deflecting coil part 24 of Miao Shuing, frame deflector coil 26 is divided into two secondary two groups of coil (30a, 30b), (31a, 31b), first coiler part 30 produces the pincushion field, second coiler part 31 produces the cydariform magnetic fields, the shape that each coil circularizes around iron core 27 around.
In addition, producing first coiler part 30 of pincushion field and second coiler part 31 in generation cydariform magnetic field is connected in parallel.And the diode 36,37 and first coiler part 30 of parallel connection/connection in the opposite direction are connected in series, and the pincushion field is subjected to restraining to strengthen the cydariform magnetic field at screen middle part.
In addition, in the predetermined period when vertical deflection rises at least, have the basic deflection current that equates effective value and be set to and flow into first coiler part 30 and second coiler part 31.Therefore, accurately proofreaied and correct, and may be corrected to enough realistic scales to misconvergence, and do not produced big correction nubbin at the misconvergence of screen upper portion horizontal direction.
It should be noted that the present invention is not limited to the embodiment of foregoing description, the implementation phase can not break away from invention scope by improving various constituent elements to implement.In addition, when disclosed above-mentioned a plurality of constituent elements are carried out suitable combination among the embodiment, can form a plurality of inventions.For example, can delete several constituent elements in disclosed all constituent elements among the embodiment.In addition, but the different constituent element appropriate combination of embodiment.
Claims (10)
1. deflecting coil that is connected to cathode ray tube (14) is characterized in that comprising:
One tapered substantially coil separator (25);
One is arranged on the horizontal deflection coil (28) in this coil separator (25);
The one coaxial outer iron core (27) of this coil separator (25) that is arranged on;
One frame deflector coil (26), comprise: first coiler part (30) and second coiler part (31), first coiler part is by a secondary coil (30a, 30b) constitute, this secondary coil around the upper and lower end parts of iron core (27) around, and it is mutually opposed by a horizontal center line, this horizontal center line is divided into equal two parts to the screen of cathode ray tube (14) in vertical direction, second coiler part is by a secondary coil (31a, 31b) constitute, this secondary coil around the left and right end portions of iron core (27) around, and opposed mutually by a vertical center line, this vertical centre bundle of lines cathode ray tube (14) is divided into equal two parts in the horizontal direction; With
One vertical deflection circuit (32), the 4th circuit wherein comprises a secondary series coil (31a who constitutes second coiler part (31), 31b), the 4th circuit is in parallel with tertiary circuit, and tertiary circuit is in series by first circuit and second circuit, first circuit comprises a secondary series coil (30a who constitutes first coiler part (30), 30b), second circuit comprises first and second diodes (36,37), this two diode is connected in parallel with opposite polarity
Wherein, flow into a secondary coil (30a who constitutes first coiler part (30), the effective value of deflection current 30b) equals flow into to constitute a secondary coil (31a, the effective value of deflection current 31b), and continue a predetermined period when vertical deflection begins of second coiler part (31) substantially.
According to the deflecting coil of claim 1, it is characterized in that 2, this vertical deflection circuit (32) comprising:
First resistance (34,35), itself and the secondary coil (30a, 30b) parallel connection that constitute first coiler part (30);
Second resistance (39,40), itself and the secondary coil (31a, 31b) parallel connection that constitute second coiler part (31);
The 3rd resistance (38), itself and (36, the 37) parallel connection of first and second diodes and
Constitute a secondary coil (30a of first coiler part (30), winding quantity 30b), constitute a secondary coil (31a of second coiler part (31), winding quantity 31b), be provided with especially with the resistance of first to the 3rd resistance, this setting makes and flows into a secondary coil (30a who constitutes first coiler part (30), the effective value of deflection current 30b) equals to flow into a secondary coil (31a who constitutes second coil (31) part substantially, the effective value of deflection current 31b), and when vertical deflection begins, continue a predetermined period.
According to the deflecting coil of claim 2, it is characterized in that 3, (31a, winding quantity 31b) is less than the secondary coil (30a, winding quantity 30b) that constitute first coiler part (30) to constitute a secondary coil of second coiler part (31).
4, according to the deflecting coil of claim 2, it is characterized in that, with a secondary coil (31a who constitutes second coiler part (31), 31b) Bing Lian second resistance (39,40) resistance less than with a secondary coil (30a who constitutes first coiler part (30), 30b) the resistance of Bing Lian first resistance (34,35).
5, deflecting coil according to claim 2, it is characterized in that, vertical deflection circuit (32) is provided with a secondary coil (30a who constitutes first coiler part (30) like this, winding quantity 30b) and first resistance (34,35) resistance, promptly, at a secondary coil (31a who constitutes second coiler part (31), winding quantity 31b), input coil (31a, deflection current 31b) and second resistance (39,40) under the state that resistance is set, (30a, the effective value of deflection current 30b) equal to flow into a secondary coil (31a who constitutes second coiler part (31) substantially to make a secondary coil that flows into formation first coiler part (30), the effective value of deflection current 31b), and when vertical deflection begins, continue a predetermined period.
6, a kind of display is characterized in that comprising:
The importation (19) that vision signal is transfused to;
One deflection current produces part (23), and this part is that the basis produces deflection current with the synchronizing signal, and this synchronizing signal is that the incoming video signal of from the importation (19) takes out;
One deflecting coil part (24), this part is come deflection beam by the deflection current generation magnetic field that deflection current produces part (23) generation; With
One cathode ray tube (14), the magnetic core logical circuit deflection electron beam that it produces with deflecting coil part (24), video shows the vision signal of input importation (19),
This deflecting coil part (24) comprising:
One tapered substantially coil separator (25);
One is arranged on the horizontal deflection coil (28) in this coil separator (25);
The one coaxial outer iron core (27) of this coil separator (25) that is arranged on;
One frame deflector coil (26) comprising:
First coiler part (30) and second coiler part (31), first coiler part is by a secondary coil (30a, 30b) constitute, this secondary coil around the upper and lower end parts of iron core (27) around, and it is mutually opposed by a horizontal center line, this horizontal center line is divided into equal two parts to the screen of cathode ray tube in vertical direction, second coiler part is by a secondary coil (31a, 31b) constitute, this secondary coil around the left and right end portions of iron core (27) around, and opposed mutually by a vertical center line, this vertical centre bundle of lines cathode ray tube (14) is divided into equal two parts in the horizontal direction; With
One vertical deflection circuit (32), the 4th circuit wherein comprises a secondary series coil (31a who constitutes second coiler part (31), 31b), the 4th circuit is in parallel with tertiary circuit, and tertiary circuit is in series by first circuit and second circuit, first circuit comprises a secondary series coil (30a who constitutes first coiler part (30), 30b), second circuit comprises first and second diodes (36,37), this two diode is connected in parallel with opposite polarity
Wherein, flow into a secondary coil (30a who constitutes first coiler part (30), the effective value of deflection current 30b) equals flow into to constitute a secondary coil (31a, the effective value of deflection current 31b), and continue a predetermined period when vertical deflection begins of second coiler part (31) substantially.
According to the display of claim 6, it is characterized in that 7, this vertical deflection circuit (32) comprising:
First resistance (34,35), itself and the secondary coil (30a, 30b) parallel connection that constitute first coiler part (30);
Second resistance (39,40), itself and the secondary coil (31a, 31b) parallel connection that constitute second coiler part (31); With
The 3rd resistance (38), itself and (36, the 37) parallel connection of first and second diodes and
Constitute a secondary coil (30a of first coiler part (30), winding quantity 30b), constitute a secondary coil (31a of second coiler part (31), winding quantity 31b), be provided with especially with the resistance of first to the 3rd resistance, this setting makes and flows into a secondary coil (30a who constitutes first coiler part (30), the effective value of deflection current 30b) equals to flow into a secondary coil (31a who constitutes second coiler part (31) substantially, the effective value of deflection current 31b), and when vertical deflection begins, continue a predetermined period.
According to the display of claim 6, it is characterized in that 8, (31a, winding quantity 31b) is less than the secondary coil (30a, winding quantity 30b) that constitute first coiler part (30) to constitute a secondary coil of second coiler part (31).
9, according to the display of claim 6, it is characterized in that, with a secondary coil (31a who constitutes second coiler part (31), 31b) Bing Lian second resistance (39,40) resistance less than with a secondary coil (30a who constitutes first coiler part (30), 30b) the resistance of Bing Lian first resistance (34,35).
10, display according to claim 6, it is characterized in that, vertical deflection circuit (32) is provided with a secondary coil (30a who constitutes first coiler part (30) like this, winding quantity 30b) and first resistance (34,35) resistance, promptly, at a secondary coil (31a who constitutes second coiler part (31), winding quantity 31b), input coil (31a, deflection current 31b) and second resistance (39,40) under the state that resistance is set, (30a, the effective value of deflection current 30b) equal to flow into a secondary coil (31a who constitutes second coiler part (31) substantially to make a secondary coil that flows into formation first coiler part (30), the effective value of deflection current 31b), and when vertical deflection begins, continue a predetermined period.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP086808/2003 | 2003-03-27 | ||
| JP2003086808A JP2004294748A (en) | 2003-03-27 | 2003-03-27 | Deflecting yoke device and vertical deflection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1534714A true CN1534714A (en) | 2004-10-06 |
Family
ID=33401336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100072434A Pending CN1534714A (en) | 2003-03-27 | 2004-02-27 | Deflecting coil device and display using the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004294748A (en) |
| CN (1) | CN1534714A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114864128A (en) * | 2022-04-28 | 2022-08-05 | 苏州博众仪器科技有限公司 | Electron beam electromagnetic deflection device and deflector |
-
2003
- 2003-03-27 JP JP2003086808A patent/JP2004294748A/en active Pending
-
2004
- 2004-02-27 CN CNA2004100072434A patent/CN1534714A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114864128A (en) * | 2022-04-28 | 2022-08-05 | 苏州博众仪器科技有限公司 | Electron beam electromagnetic deflection device and deflector |
| CN114864128B (en) * | 2022-04-28 | 2024-03-22 | 苏州博众仪器科技有限公司 | Electron beam electromagnetic deflection device and deflector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004294748A (en) | 2004-10-21 |
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