CN1534715A - Deflecting coil device and display device using the same - Google Patents
Deflecting coil device and display device using the same Download PDFInfo
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- CN1534715A CN1534715A CNA200410030479XA CN200410030479A CN1534715A CN 1534715 A CN1534715 A CN 1534715A CN A200410030479X A CNA200410030479X A CN A200410030479XA CN 200410030479 A CN200410030479 A CN 200410030479A CN 1534715 A CN1534715 A CN 1534715A
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Abstract
To obtain a deflection yoke device having a small misconvergence correction margin. The vertical deflection coil 13 is split into two pairs of two sets of a first coil part 15 for generating pincushion magnetic field and a second coil part 16 for generating barrel magnetic field, and wound on a core 12 in toroidal winding. Two pieces of diodes 24, 25 connected in parallel in mutually reversed polarity are serially connected to the first coil part 15, and the generation of the pincushion magnetic field is suppressed, and the barrel magnetic field is enhanced by turning off the diodes 24, 25 in the central region of the screen. Furthermore, the winding region of the second coil part 16 is arranged against the X axis of the screen so as not to exceed by 50[deg.]. (C)2005,JPO&NCIPI.
Description
Technical field
The present invention relates to the improvement of deflecting coil in the cathode ray tube of colour TV receiver for example or color display apparatus.In addition, the invention still further relates to the display device that uses above-mentioned deflecting coil.
Background technology
As people known to usually, come controlling electron beam by following manner as the deflecting coil of the above-mentioned type.That is, the electron beam R (red) corresponding to three primary colors, the G (green) of electron gun emission and each electron beam among the B (orchid) are applied deflection, make electron beam R, G and B to scan by certain path on fluoroscopic surface.
Such deflecting coil comprises the basic conical isolator that is, at the horizontal deflection coil of the inboard of isolator configuration and the frame deflector coil that disposes in the outside of isolator.In this equipment, the sawtooth deflection current synchronous with level and vertical cycle is allowed to flow to these coils to produce magnetic field, and this magnetic field is used to make each electron beam R, G and B to deflect.
Be furnished with under the situation of the above-mentioned deflecting coil deflection in the cathode ray tube of embedded type electron gun at electron beam, usually known to, electron beam R and B the forward misconvergence occurs at the core of screen, and the negative sense misconvergence occurs in the top and the bottom of screen.
In this case, people have proposed various suggestions at present, have crisscross relatively misconvergence to proofread and correct between screen center's part and upper and lower part.Yet these schemes that up to the present proposed still can not be eliminated positive negative sense fully and intersect misconvergence, and it is still unresolved to proofread and correct incomplete problem.
Particularly, when using deflecting coil in plate color cathode ray tube (most popular now), the positive negative sense intersection misconvergence alignment technique that proposes at present still has following defective.That is, use this technology can not eliminate this misconvergence fully, and mainly partly cause the incomplete correction of misconvergence in screen center.
Summary of the invention
At above-mentioned situation the present invention has been proposed, its purpose is to provide a kind of misconvergence that positive negative sense can be intersected to be corrected to actual enough levels, but do not leave over the deflecting coil of significantly incomplete correct residual part, and a kind of display device that uses this deflecting coil is provided.
According to an aspect of the present invention, provide a kind of deflecting coil that is installed in the cathode ray tube, it is characterized in that comprising: be formed the coil isolation that is cone shape substantially; Be configured in the horizontal deflection coil of coil isolation inboard; Be configured in the coil isolation outside and the magnetic conduction core (core) coaxial with coil isolation; Be wound on this magnetic conduction core frame deflector coil on every side; This frame deflector coil further comprises: first coiler part, comprise the upper part and the end portion a pair of coil on every side that are wound on the magnetic conduction core, this to coil toward each other, set a central shaft therebetween, this central shaft along continuous straight runs extends, with the screen of cathode ray tube five equilibrium vertically; With second coiler part, comprise the left end portion and the right end portion a pair of coil on every side that are wound on this magnetic conduction core, this sets a central shaft therebetween to coil toward each other, this central shaft vertically extends, with the screen along continuous straight runs five equilibrium of cathode ray tube.
According to another aspect of the present invention, provide a kind of display device, it is characterized in that comprising: the importation is configured to receive the picture signal to its input; Deflection current produces part, is configured to produce deflection current according to the synchronizing signal that extracts from the picture signal that is input to the importation; The deflecting coil part is configured to produce the deflection current that partly produces by deflection current and produces the magnetic field that electron beam is deflected; Cathode ray tube is formed at by deflecting coil and partly makes when producing electron beam and deflecting, and according to the picture signal display image from the importation input, this deflecting coil part further comprises: be formed the coil isolation that is cone shape substantially; Be configured in the horizontal deflection coil of coil isolation inboard; Be configured in the coil isolation outside and the magnetic conduction core coaxial with coil isolation; Be wound on this magnetic conduction core frame deflector coil on every side; This frame deflector coil further comprises: first coiler part, comprise the upper part and the end portion a pair of coil on every side that are wound on the magnetic conduction core, this to coil toward each other, set a central shaft therebetween, this central shaft along continuous straight runs extends, with the screen of cathode ray tube five equilibrium vertically; With second coiler part, comprise the left end portion and the right end portion a pair of coil on every side that are wound on this magnetic conduction core, this sets a central shaft therebetween to coil toward each other, this central shaft vertically extends, with the screen along continuous straight runs five equilibrium of cathode ray tube.
Description of drawings
Shown in Fig. 1 is the front view of television broadcasting receiving device according to an embodiment of the invention;
Shown in Fig. 2 is the block diagram that illustrates the signal processing system of television broadcasting receiving device according to this embodiment;
Shown in Fig. 3 is the end view of deflecting coil part among the embodiment;
Shown in Fig. 4 is the sectional view of the deflecting coil frame deflector coil reeling condition partly of explanation embodiment;
Shown in Fig. 5 is to illustrate the circuit structure diagram that the vertical deflection circuit of vertical yoke current is provided to frame deflector coil among the embodiment;
Shown in Fig. 6 is the legend that illustrates the vertical isotropism astigmatism among the embodiment;
Shown in Fig. 7 is the legend that illustrates another kind of vertical isotropism astigmatism among the embodiment;
Shown in Fig. 8 is to illustrate among the embodiment legend that vertical isotropism astigmatism has obtained the state proofreaied and correct;
Shown in Fig. 9 is the legend that illustrates vertical comatic aberration among the embodiment;
Shown in Figure 10 is to illustrate vertical comatic aberration among the embodiment to have obtained the state diagram of proofreading and correct;
Shown in Figure 11 is the legend that illustrates the waveform of the vertical deflection voltage that is applied to vertical deflection circuit among the embodiment;
Shown in Figure 12 is the illustration that the waveform of the vertical yoke current that provides to frame deflector coil among the embodiment is provided;
Shown in Figure 13 is the legend that illustrates among the embodiment waveform of the vertical yoke current that first coiler part to frame deflector coil provides;
Shown in Figure 14 is the legend that illustrates among the embodiment waveform of the vertical yoke current that second coiler part to frame deflector coil provides;
Shown in Figure 15 is to illustrate second coil among the embodiment about the coefficient correlation chart between the winding angle of X-axis and the misconvergence amount of having proofreaied and correct;
Shown in Figure 16 is to illustrate the legend of specifying the various parameters of misconvergence among the embodiment;
Shown in Figure 17 is the legend that illustrates the positive negative sense intersection misconvergence of conventional deflecting coil generation;
Shown in Figure 18 is to illustrate to proofread and correct forward that screen center partly occurs and intersect the legend of conventional method of misconvergence;
Shown in Figure 19 is the legend that illustrates the conventional method of the upper part of correction screen and the negative sense intersection misconvergence that end portion occurs.
Embodiment
Embodiments of the present invention is described in detail now with reference to accompanying drawing.Shown in Fig. 1 is the front view of the television broadcasting receiving device 11 that will describe in an embodiment.Television broadcasting receiving device 11 mainly comprises television cabinet 12 and supports the brace table 13 of this cabinet.
In cabinet 12, the screen 14 of CRT (cathode ray tube) is positioned at the core of front surface.And in the screen sides of CRT 14, this cabinet 12 has mains switch 15 and is used to receive from the receiving unit 16 of the operation information of Digiplex or the like transmission.
On the other hand, brace table 13 is pivotally connected to the core of cabinet 12 bottom surfaces.Brace table 13 is designed to can support cabinet 12 to keep vertical state when brace table is placed on the horizontal plane of certain base station 17.
Shown in Fig. 2 is the signal processing system of TV broadcast reception device 11.As shown in the figure, the television broadcasting signal that receives by antenna 18 is delivered to tuning part 19.Tuning part 19 is used for selecting from the television broadcasting signal of above-mentioned input the TV signal of desirable broadcasting channel.
Then, tuning part 19 is delivered to image demodulation process part 20 and synchronization detecting section 21 with the TV signal of selected channel.In these parts, image demodulation process part 20 is extracted picture content from input TV signal, and it is carried out demodulation process.After this, this processing section 20 is exported the signal of handling by drive part 22 to CRT 14.
Synchronization detecting section 21 is extraction level and vertical synchronization component from input TV signal, and they are outputed to deflection current generation part 23.Deflection current generation part 23 produces level and vertical yoke current according to the level of above-mentioned input and vertical synchronization component, and they are outputed to deflecting coil part 24 on the neck part 14a that is assemblied in CRT 14.
When the horizontal deflection coil of delivering to deflecting coil part 24 respectively by the level and the vertical yoke current of 23 outputs of deflection current generation part and frame deflector coil (will be described later), the picture signal of drive part 22 outputs is shown as the image on the CRT 14.
Shown in Fig. 3 is the outward appearance of deflecting coil part 24.As shown in the figure, provide magnetic conduction core 27 around coil isolation 25, wherein frame deflector coil 26 is wound on the magnetic conduction core 27 with circular pattern, and coil isolation 25 is formed the cone shape that there is opening at two ends.
The horizontal deflection coil 28 of reeling in the saddle type mode is provided in the inboard of coil isolation 25.By the less opening of its diameter, utilize mounting strap 29 that coil isolation 25 is installed on the neck 14a of CTR 14.
Fig. 4 is the sectional view of the deflecting coil part 24 that obtains on the direction vertical with the electron beam direction of illumination.As shown in the figure, provide a kind of ring-type magnetic conduction core 27 that is used for frame deflector coil around coil isolation 25 with coaxial manner, frame deflector coil 26 is wound on the magnetic conduction core 27 with circular pattern.In addition, the horizontal deflection coil 28 of reeling in the saddle type mode places the inboard of coil isolation 25.
Here, frame deflector coil 26 comprises first coiler part 30 and second coiler part 31.First coiler part 30 further comprises a pair of upper and lower end part coil on every side that is wound on magnetic conduction core 27, this to coil toward each other, to set X-axis betwixt, this X-axis is a central shaft, and along continuous straight runs extends to divide the screen of CRT 14 equally in vertical direction.Second coiler part 31 further comprises a pair of left end portion of magnetic conduction core 27 and the coil around the right end portion of being wound on, this to coil toward each other, to set Y-axis betwixt, this Y-axis is a central shaft, vertically extends to divide the screen of CRT 14 in the horizontal direction equally.
In addition, magnetic conduction core 27 has the part of not reeled by coil, promptly exposes the part on the surface of magnetic conduction core 27.These parts are positioned at the coil 30a that is wound with first coil 30 and the zone of 30b, and are wound with between the zone of the coil 31a of second coil 31 and 31b.
To reeling, each direction is all in being no more than 50 ° angular range at the upper and lower of relative X-axis for the coil 31a that constitutes second coiler part 31 and 31b.
Shown in Fig. 5 is the example that the vertical deflection circuit 32 of vertical yoke current is provided to the frame deflector coil 26 of deflecting coil part 24.As shown in the figure, an end of the end of the coil 30a of first coiler part 30 and resistance 34 is connected on the terminal 33.
The other end of the other end of coil 30a and resistance 34 connects altogether, and an end of the end of the coil 30b of first coiler part 30 and resistance 35 is connected to this points of common connection.
The other end of the other end of coil 30b and resistance 35 connects altogether, and the anode of diode 36, the negative electrode of diode 37 and an end of resistance 38 are connected to this points of common connection.
In addition, the other end of the anode of the negative electrode of diode 36, diode 37 and resistance 38 connects altogether.In other words, connect with the coil 30a and the 30b that are cascaded with the mode diode connected in parallel 36 and 37 that direction is opposite each other.
On the other hand, an end of the end of the coil 31a of second coiler part 31 and resistance 39 is connected to terminal 33.The other end of the other end of coil 31a and resistance 39 connects altogether, and an end of the end of the coil 31b of second coiler part 31 and resistance 40 is connected to this points of common connection.
The other end of the other end of coil 31b and resistance 40 connects altogether, and the negative electrode of diode 36, the anode of diode 37 and the other end of resistance 38 are connected to this points of common connection.
One end of resistance 41 and the anode of diode 42 are connected to the negative electrode of diode 36, the anode of diode 37, the other end of resistance 38, the tie point of the other end of the other end of coil 31b and resistance 40.The negative electrode of the other end of resistance 41 and diode 42 connects altogether, and this points of common connection is connected with an end of vertical isotropism astigmatic correction coil 43.
In addition, an end of resistance 44 and the negative electrode of diode 45 are connected to the negative electrode of diode 36, the anode of diode 37, the other end of resistance 38, the tie point of the other end of the other end of coil 31b and resistance 40.The anode of the other end of resistance 44 and diode 45 connects altogether, and this points of common connection is connected with an end of vertical isotropism astigmatic correction coil 46.
The other end of vertical isotropism astigmatic correction coil 43 and the other end of vertical isotropism astigmatic correction coil 46 connect altogether, and this points of common connection is connected with terminal 49 with 48 by the vertical comatic aberration correcting coil 47 of connecting.
Between terminal 33 and 49, apply vertical deflection voltage.Voltage is applied to terminal 33, and this voltage has such form, makes at the starting point place voltage of the first half (in the top of screen) of its vertical deflection the highlyest, little by little reduce to screen center then, and final vanishing voltage (reference voltage).In this case, terminal 49 links to each other with reference point of potential, and vertical yoke current flows to terminal 49 from terminal 33.Therefore, terminal 33 is exactly so-called high-end.
Voltage is applied to terminal 49, and this voltage has such form, makes starting point place voltage minimum (reference potential) at the latter half (bottom of screen) of its vertical deflection, and the voltage that becomes in the lower end of screen is the highest.In this case, terminal 33 links to each other with reference point of potential, and vertical yoke current flows to terminal 33 from terminal 49.Therefore, terminal 49 is exactly so-called low side.
The vertical isotropism astigmatism that vertical isotropism astigmatic correction coil 43 and 46 is designed to occur on the Y-axis to the screen of CRT 14 is proofreaied and correct, they are installed to by coil isolation 25 near the opening of deflecting coil part 24, and described opening is positioned at neck part 14a one side of CRT 14.
Vertical isotropism astigmatism be as shown in Figure 6 and Figure 7 the screen upper and lower end along X-axis away from each other electron beam R and B between the convergence errors that produces.Can proofread and correct vertical isotropism astigmatism by vertical isotropism astigmatic correction coil 43 with 46 magnetic fields that produced.
More specifically, near the upper and lower end of screen, vertical deflection voltage is very high.Therefore, diode 42 and 45 places unlatching (ON) state, and the electric current of flow through vertical isotropism astigmatic correction coil 43 and 46 increases.Therefore, the magnetic field grow that vertical isotropism astigmatic correction coil 43 and 46 is produced is to proofread and correct this vertical isotropism astigmatism.So, as shown in Figure 8, electron beam R and B basically identical each other on Y-axis.
The vertical comatic aberration that vertical comatic aberration correcting coil 47 and 48 is designed to occur on the X-axis to the screen of CRT 14 is proofreaied and correct, they be installed to by coil isolation 25 deflecting coil part 24 opening near, this opening is positioned at neck part 14a one side of CRT 14. Correcting coil 47 and 48 produces the pincushion field.
Vertical comatic aberration is as shown in Figure 9 the convergence errors that produces because relative electron beam R of electron beam G and B are inwardly displaced in Y direction.Vertical comatic aberration can be proofreaied and correct by vertical comatic aberration correcting coil 47 and 48 pincushion fields that produced.Thereby as shown in Figure 10, basic and electron beam R of electron beam G and B are consistent.
Now then describe the function of frame deflector coil 26 in detail.The vertical deflection voltage that supposition now has waveform as shown in figure 11 is applied between the terminal 33 and 49 of vertical deflection circuit 32 as shown in Figure 5.In this case, resembling the vertical yoke current shown in Figure 12 flows through between terminal 33 and 49.
In Figure 11, voltage V1 and-V1 represents upper and lower bound.Promptly for the voltage that is higher than V1 or be lower than-voltage of V1, diode 36 and 37 all is set to open (ON) state, therefore conduction.For V1 and-voltage (shown in cycle t1) between the V1, diode 36 and 37 all is in not on-state, promptly all is set to close (OFF) state.
Vertical yoke current as shown in Figure 12 is flow through first coil 30 of formation frame deflector coil 24 and the total current of second coil 31.Owing to be connected in series to the diode 36 of first coiler part 30 and 37 operation, asymmetrical current flow through first coiler part 30 and second coiler part 31.
More specifically, during the cycle t1 shown in Figure 11, diode 36 and 37 is not conductings.Therefore, as shown in Figure 13, during cycle t1, do not have electric current to pass through first coiler part 30 basically, and vertical yoke current only flow through second coiler part 31.
In other cycle outside cycle t1, vertical yoke current is the current component sum of the current component of second coiler part 31 and first coil 30 of flowing through as shown in figure 13 of flowing through as shown in figure 14.
In cycle t1, diode 36 and 37 is set to close (OFF) state, do not have electric current to pass through to produce first coiler part 30 of pincushion field, therefore the barrel field of second coiler part, 31 generations highlights, and has proofreaied and correct the forward intersection misconvergence that partly occurs in screen center thus.
On the other hand, in the cycle outside cycle t1, diode 36 and 37 is set to open (ON) state.Therefore, the negative sense intersection misconvergence that occurs in the upper part of screen and the end portion can be proofreaied and correct by the pincushion field that first coiler part 30 is produced.
In addition, in this embodiment, as previously mentioned, the coil 31a that constitutes second coil 31 and 31b are reeling in being no more than 50 ° angular range along the upper and lower of relative X-axis.The advantage that this structure obtained is described in detail now with reference to Figure 15 and Figure 16.
Figure 15 shows the winding angle of second coiler part, 31 relative X-axis and is generally used for specifying relation between various types of parameters of misconvergence amount (obtaining by test).
More specifically, when the winding angle of second coiler part, 31 relative X-axis is set to 54 °, 50 ° and 47 °, the value of measurement parameter XH, YH, PQH, PQV, T, S3, B3, S3-PQV and B3-PQH.
Figure 16 has illustrated above-mentioned parameter XH, YH, PQH, PQV, T, S3, B3, S3-PQV and B3-PQH.Should be noted in the discussion above that in Figure 16 electron beam R represents with symbol zero, electron beam B is with symbol * represent.
In the horizontal direction poor of electron beam R and B on the parameter YH indication Y-axis.The state that the relative electron beam B of electron beam R is positioned at the left side with+(just) represent the amount of its numerical tabular differential.In the situation shown in Figure 16, electron beam R is positioned at the left side of electron beam B, so state has+pattern.
Should be noted in the discussion above that in Figure 16 if electron beam R is positioned at the left side of electron beam B in any quadrant, then the difference of horizontal direction always has the form of (+).First and third quadrant in, when the relative electron beam R of electron beam B was positioned at the top, the difference of vertical direction had the form of (+).And on the other hand, in second quadrant and four-quadrant, when the relative electron beam B of electron beam R was positioned at the top, the form that the difference of vertical direction has with (+) occurred.
XH represents in the horizontal direction poor of electron beam R and B on the X-axis.PQH represents in the horizontal direction poor of the electron beam R of screen corner portions located and B.PQV represents poor in vertical direction of the electron beam R of screen corner portions located and B.
T represents three difficult derivations (trilemma), and it can be expressed as following formula: T=PQV+XH-YH.It is poor that S3 is illustrated in the vertical direction core electron beam R and the vertical direction between the B last or lower semisection of screen.B3 be illustrated on the screen or the vertical direction core electron beam R and the horizontal direction between the B of lower semisection poor.S3-PQV represents the absolute value of the difference of S3 and PQV, and B3-PQH represents the absolute value of the difference of B3 and PQH.
The parameter of these above-mentioned types is generally used for indicating the state of the misconvergence in the deflecting coil.
Here, if XH and YH value be changed to+0.10, and the relative X-axis of angle of second coiler part of reeling is changed to 54 °, then PQH is+0.30, PQV is-0.30, T is-0.30.In addition, S3 is+0.70, and B3 is+0.80, and S3-PQV is 1.00, and B3-PQH is 0.50.Be worth more for a short time, then the difference between electron beam R and the B is also just more little.In other words, along with value becomes more little, assemble the difference surplus and also can therefore diminish.
Simultaneously, if the relative X-axis of the winding angle of second coiler part 31 is changed to 50 °, and the value of XH and YH be changed to+0.10, then PQH is+0.20, PQV is-0.30, T is-0.30.In addition, S3 is+0.30, and B3 is+0.20, and S3-PQV is 0.65, and B3-PQH is 0.00.
When the relative X-axis of winding angle of second coiler part 31 was set to 50 °, the situation that is set to 54 ° with winding angle was compared, and the result does not show any degeneration in these, but has shown the improvement of all these.Especially, the value of S3, B3, S3-PQV and B3-PQH has clearly illustrated that significant improvement.
In addition, if the relative X-axis of the winding angle of second coiler part 31 is changed to 47 °, and the value of XH and YH be changed to+0.10, then PQH is+0.10, PQV is-0.25, T is-0.25, S3 is+0.25, B3 is+0.05.S3-PQV is 0.50, and B3-PQH is-0.05.
When winding angle was set to 47 °, the situation that is set to 50 ° with winding angle was compared, and the result shows that the value of B3-PQH has degeneration slightly, but shows that other has improvement.Therefore, obviously do not show the misconvergence surplus that can in operation of equipment, cause any practical problem in this case.
When the relative X-axis of winding angle of second coiler part 31 surpasses 50 °, expect that the barrel field that second coiler part 31 is produced dies down, and causes the degeneration of the value of S3, B3, S3-PQV and B3-PQH thus.On the other hand, if winding angle is set to 50 ° or 47 °, obviously the value of S3, B3, S3-PQV and B3-PQH is significantly improved.
Based on The above results, final assessment is that winding angle is that 54 ° situation is poor, is not suitable for its deflecting coil as reality.On the other hand, winding angle is that 50 ° situation is good, and that winding angle is 47 ° a situation is very good.Therefore, if these two kinds of situations are used for actual deflecting coil, they are enough.
Compare with said circumstances, with different among the embodiment of the invention described above, the coiler part that conventional deflecting coil is not cut apart in its frame deflector coil, wherein frame deflector coil 26 is divided into first and second coiler parts 30 and 31.But conventional equipment has such structure, and wherein frame deflector coil is wound on the magnetic conduction core that is disposed at the isolator outside corresponding to the upper part of screen and the position of end portion.
If the above-mentioned conventional deflecting coil deflection beam by in the color cathode ray tube that disposes embedded type electron gun can produce the misconvergence with trend as shown in Figure 17 usually.
That is, at the top subregion as screen center zone 1 partly, the radiation position of electron beam R moves along right hand direction of rotation.Therefore, in the right-hand side zone of screen, along with the radiation position of the relative electron beam B of electron beam R more away from Y-axis, the radiation position of electron beam R is near X-axis.On the other hand, in the zone, left-hand side of screen, along with electron beam R more away from Y-axis, its radiation position moves in the direction away from X-axis.
In the bottom subregion in screen center zone 1 partly, electron beam beta radiation position rotates along right hand direction of rotation.Therefore, in the right-hand side zone of screen, along with the radiation position of the relative electron beam R of electron beam B more away from Y-axis, the radiation position of electron beam B is more away from X-axis.On the other hand, in the left-hand side zone of screen, along with electron beam R more away from Y-axis, the radiation position of electron beam R is to moving near the direction of X-axis more.That is, forward intersection misconvergence has appearred.
In the zone 2 of upper part that is arranged in screen and end portion, so-called negative sense intersection misconvergence appears.That is, the radiation position of electron beam B moves along right hand direction of rotation in the upper part, and the radiation position of electron beam R moves along right hand direction of rotation at end portion.
As mentioned above, electron beam R and B crisscross in screen center part zone 1 and the zone 2 of the top and bottom part of screen between be opposite.Therefore, be not easy to proofread and correct simultaneously the misconvergence that these zones occur.For this reason, various suggestions have been proposed.
For example, following suggestion is one of them of these suggestions.That is, make the core of horizontal magnetic field have barrel-shaped trend, the forward intersection that therefore particularly appears at zone 1 obtains proofreading and correct.In addition, in at least one coil of horizontal deflection coil and frame deflector coil, therefore near the blank parts that does not have the winding around lead (this corner corresponding to screen) is being provided in the about 35 ° angular range of X-axis deflection, and the negative sense that particularly occurs in the zone 2 intersects and obtains proofreading and correct.
More specifically, as shown in Figure 18, when the core that makes horizontal magnetic field has barrel-shaped trend, in the first quartile of screen, the relative electron beam B of electron beam R be subjected to pointing to screen upward to the influence of the active force (Lorentz power) of (+Y direction), and in the four-quadrant of screen, the relative electron beam B of electron beam R is subjected to pointing to the influence of the active force (Lorentz power) of screen downward direction (Y direction).In addition, in second quadrant of screen, electron beam B is relative, and electron beam R is pointed to+influence of the active force of Y direction, and at third quadrant, electron beam B is relative, and electron beam R is pointed to-influence of the active force of Y direction.Above-mentioned phenomenon is particularly remarkable in the zone shown in Figure 17 1, and therefore, the forward intersection misconvergence in the zone 1 finally can access correction.
Simultaneously, if in the about 35 ° angular range of X-axis deflection, in frame deflector coil, form the blank parts that does not have the winding around lead, as shown in Figure 19, electron beam B is subjected to the influence of the active force of FB＞FR in first and four-quadrant of screen, and electron beam R is subjected to the influence of the active force of FR＞FB in second and third quadrant of screen.Above-mentioned phenomenon is particularly remarkable in zone 3 as shown in figure 17, and the negative sense intersection misconvergence that therefore occurs in the zone 2 finally can access correction.
Yet the conventional technology with foregoing that proposes is just adjusted DISTRIBUTION OF MAGNETIC FIELD in compromise mode.For such technology, the misconvergence that still positive negative sense can not be intersected reduces to a practical fully level.
Under this condition, another kind of technology has been proposed recently.Promptly, in this technology, frame deflector coil is divided into two pairs of coiler parts (2 * 2), produce barrel field by each coiler part that obtains that winds the line in 0 to 60 ° angular range of relative X-axis, each coiler part that obtains by coiling lead in 60 to 90 ° angular range of relative X-axis produces pincushion field.In addition, two coiler parts with opposite polarity diode connected in parallel and generation pincushion field are connected in series, so this diode is according to the signal voltage value opening and closing that provide for frame deflector coil.
According to this suggestion, the voltage that provides to frame deflector coil is high at the starting point place (upper end of screen) of deflection, reduces gradually to screen center.Finally, it becomes 0 in the center of screen.Afterwards, the polarity inversion of the voltage that provides to frame deflector coil, and increasing gradually provides the opposite polarity same threshold voltage with the starting point place in the end point (lower end of screen) of deflection.
For said structure, diode is closed near the center of screen, suppresses the generation of pincushion field thus.Therefore, the influence that generates the coiler part of barrel field plays dominating role, so barrel field has obtained highlighting.By this way, the forward intersection misconvergence of screen center's part (zone 1) can access correction.
On the other hand, at the upper part and the end portion of screen, diode is in conducting state, and the coiler part that therefore produces the pincushion field is also in running order.By this way, the negative sense intersection misconvergence of the upper part of screen and end portion (zone 2) can access correction.
Yet, for the technology in the above-mentioned suggestion, still can not fully eliminate positive negative sense intersection misconvergence simultaneously, also have the part of not proofreading and correct fully to exist.Particularly, when this technology was used to the deflecting coil of plate color cathode ray tube, misconvergence can not fully be eliminated.More specifically, still there is the misconvergence part of not proofreading and correct fully in screen center's part.
On the contrary, in the deflecting coil part 24 that this embodiment describes, frame deflector coil 26 is divided into first coiler part 30 that produces the pincushion field and two pairs of coiler parts (30a, 30b) and (31a, the 31b) that produces second coiler part 31 of barrel field, and they are wound on around the magnetic conduction core 27 with circular pattern.
For said structure, with the flow through electric current of first coiler part 30 that produces the pincushion field of such timing controlled, make screen center partly be deflected, therefore barrel field is highlighted during control cycle.In addition, the Wire-wound scope of second coiler part 31 that produces barrel field is set, makes relative X-axis be no more than 50 °.By this way, the surplus of not proofreading and correct fully of misconvergence can be reduced to extremely low-level.
At last, the present invention is not limited to the foregoing description, but as long as keep essential characteristic of the present invention, just can be embodied as the various version of embodiment by the construction unit of revising this equipment.In addition, disclosed some construction unit can make up in a suitable manner to form various version of the present invention in the foregoing description.For example, some construction unit can remove from the total of embodiment, perhaps the construction unit among some embodiment and those unit in the foregoing description can be carried out suitable combination.
Claims (12)
1. deflecting coil that is installed in the cathode ray tube (14) is characterized in that comprising:
Coil isolation (25) is formed and has cone shape substantially;
Horizontal deflection coil (28) is configured in the inboard of coil isolation (25);
Magnetic conduction core (27) is configured in the outside of coil isolation (25) and coaxial with it;
Be wound on magnetic conduction core (27) frame deflector coil (26) on every side;
This frame deflector coil (26) further comprises:
First coiler part (30), comprise the upper part and the end portion a pair of coil (30a on every side that are wound on magnetic conduction core (27), 30b), this to coil toward each other, set a central shaft therebetween, this central shaft along continuous straight runs extends, with the screen of cathode ray tube (14) vertically five equilibrium and
Second coiler part (31), comprise the right end portion and the left end portion a pair of coil (31a on every side that are wound on this magnetic conduction core (27), 31b), this to coil toward each other, set a central shaft therebetween, this central shaft vertically extends, with the screen along continuous straight runs five equilibrium of cathode ray tube (14).
2. deflecting coil as claimed in claim 1 is characterized in that:
This that constitutes first coiler part (30) is wound on magnetic conduction core (27) on every side to coil (30a, 30b) with predetermined subtended angle scope, thereby in the relative central shaft symmetry of vertical direction, and
This that constitutes second coiler part (31) is wound on magnetic conduction core (27) on every side to coil (31a, 31b) with predetermined subtended angle scope, thus central shaft symmetry relatively in the horizontal direction.
3. deflecting coil as claimed in claim 1 is characterized in that:
This that constitutes first coiler part (30) is wound on magnetic conduction core (27) on every side to coil (30a, 30b) with its central shaft symmetrical manner relatively, and
This that constitutes second coiler part (31) is wound on magnetic conduction core (27) on every side to coil (31a, 31b) with its central shaft symmetrical manner relatively.
4. deflecting coil as claimed in claim 1, it is characterized in that, be wound with the coil that constitutes first coiler part (30) to the zone of (30a, 30b) be wound with between the zone of coil to (31a, 31b) of formation second coiler part (31), magnetic conduction core (27) has the zone of wherein not reeling coil and exposing the surface portion of magnetic conduction core to the open air.
5. deflecting coil as claimed in claim 1 is characterized in that further comprising:
Reverse parallel connection to be forming first and second diodes (36 and 37) of circuit each other, and this circuit is in series to (30a, 30b) formed circuit with the coil that is one another in series and constitute first coiler part (30),
It is characterized in that, be connected in series and constitute second coiler part (31) this formed circuit of coil (31a, 31b) and first coiler part (30) and the formed circuit of first and second diodes (36 and 37) that are connected in series are in parallel.
6. as claim 1,2,3,4 or 5 described deflecting coils, it is characterized in that, this that constitutes second coiler part (31) to coil (31a, 31b) at the upper and lower of the central shaft of horizontal direction relatively to coiling, wherein each coil is all in being not more than 50 ° subtended angle scope.
7. display device is characterized in that comprising:
Importation (19) is configured to receive the picture signal to its input;
Deflection current produces part (23), is configured to produce deflection current according to the synchronizing signal that extracts from the picture signal that is input to importation (19);
Deflecting coil part (24), the deflection current that is configured to produce by deflection current generation part (23) produces the magnetic field that electron beam is deflected;
Cathode ray tube (14) is formed at when by deflecting coil part (24) electron beam of generation being deflected, according to the picture signal display image of (19) input from the importation,
This deflecting coil part (24) further comprises:
Coil isolation (25) is formed and has cone shape substantially;
Horizontal deflection coil (28) is configured in the inboard of coil isolation (25);
Magnetic conduction core (27) is configured in the outside of coil isolation (25) and coaxial with it; With
Be wound on magnetic conduction core (27) frame deflector coil (26) on every side;
This frame deflector coil (26) further comprises:
First coiler part (30), comprise the upper part and the end portion a pair of coil (30a on every side that are wound on magnetic conduction core (27), 30b), this to coil toward each other, set a central shaft therebetween, this central shaft along continuous straight runs extends, with the screen of cathode ray tube (14) vertically five equilibrium and
Second coiler part (31), comprise the right end portion and the left end portion a pair of coil (31a on every side that are wound on this magnetic conduction core (27), 31b), this to coil toward each other, set a central shaft therebetween, this central shaft vertically extends, with the screen along continuous straight runs five equilibrium of cathode ray tube (14).
8. display device as claimed in claim 7 is characterized in that:
This that constitutes first coiler part (30) is wound on magnetic conduction core (27) on every side to coil (30a, 30b) with predetermined subtended angle scope, thereby in the relative central shaft symmetry of vertical direction, and
This that constitutes second coiler part (31) is wound on magnetic conduction core (27) on every side to coil (31a, 31b) with predetermined subtended angle scope, thus central shaft symmetry relatively in the horizontal direction.
9. display device as claimed in claim 7 is characterized in that:
This that constitutes first coiler part (30) is wound on magnetic conduction core (27) on every side to coil (30a, 30b) with its central shaft symmetrical manner relatively, and
This that constitutes second coiler part (31) is wound on magnetic conduction core (27) on every side to coil (31a, 31b) with its central shaft symmetrical manner relatively.
10. display device as claimed in claim 7, it is characterized in that, be wound with the coil that constitutes first coiler part (30) to the zone of (30a, 30b) be wound with between the zone of coil to (31a, 31b) of formation second coiler part (31), magnetic conduction core (27) has the zone of wherein not reeling coil and exposing the surface portion of magnetic conduction core to the open air.
11. display device as claimed in claim 7 is characterized in that further comprising:
Reverse parallel connection to be forming first and second diodes (36 and 37) of circuit each other, and this circuit is in series to (30a, 30b) formed circuit with the coil that is one another in series and constitute first coiler part (30),
It is characterized in that, be connected in series and constitute second coiler part (31) this formed circuit of coil (31a, 31b) and first coiler part (30) and the formed circuit of first and second diodes (36 and 37) that are connected in series are in parallel.
12. as claim 7,8,9,10 or 11 described display devices, it is characterized in that, this that constitutes second coiler part (31) to coil (31a, 31b) at the upper and lower of the central shaft of horizontal direction relatively to coiling, wherein each coil is all in being not more than 50 ° subtended angle scope.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003086806A JP2004296257A (en) | 2003-03-27 | 2003-03-27 | Deflection yoke device |
| JP086806/2003 | 2003-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1534715A true CN1534715A (en) | 2004-10-06 |
Family
ID=33401334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200410030479XA Pending CN1534715A (en) | 2003-03-27 | 2004-03-15 | Deflecting coil device and display device using the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004296257A (en) |
| CN (1) | CN1534715A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710277A (en) * | 2012-05-24 | 2012-10-03 | 摩比天线技术（深圳）有限公司 | Radio frequency choke device and aerial system comprising same |
| CN114072251A (en) * | 2019-05-21 | 2022-02-18 | 泰克米特工程简易股份公司 | Electron beam welding device |
-
2003
- 2003-03-27 JP JP2003086806A patent/JP2004296257A/en active Pending
-
2004
- 2004-03-15 CN CNA200410030479XA patent/CN1534715A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710277A (en) * | 2012-05-24 | 2012-10-03 | 摩比天线技术（深圳）有限公司 | Radio frequency choke device and aerial system comprising same |
| CN114072251A (en) * | 2019-05-21 | 2022-02-18 | 泰克米特工程简易股份公司 | Electron beam welding device |
| CN114072251B (en) * | 2019-05-21 | 2023-09-26 | 泰克米特工程简易股份公司 | Electron beam welding device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004296257A (en) | 2004-10-21 |
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