CN1224981A - Deflection yoke - Google Patents
Deflection yoke Download PDFInfo
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- CN1224981A CN1224981A CN 98125552 CN98125552A CN1224981A CN 1224981 A CN1224981 A CN 1224981A CN 98125552 CN98125552 CN 98125552 CN 98125552 A CN98125552 A CN 98125552A CN 1224981 A CN1224981 A CN 1224981A
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- coil
- frame deflector
- pincushion distortion
- deflection yoke
- correct
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Abstract
A deflection yoke includes horizontal deflection coils; vertical deflection coils; and coils for correcting a vertical pincushion distortion, which coils are provided aside from the vertical deflection coils; wherein the coils for correcting a vertical pincushion distortion have such a wire-wound form as to generate a magnetic field having a pattern substantially equal to that of the vertical deflection coils. This is effective to carry a parabolic current with horizontal cycles for correcting a vertical pincushion distortion at a low voltage, and hence to simplify the circuit configuration and reduce the manufacturing cost.
Description
The present invention relates to be used for the deflection yoke of color cathode ray tube, specifically, relate to the deflection yoke that to proofread and correct vertical pincushion distortion with simple structure.
For the color cathode ray tube (CRT) that is its three horizontal word orders of color electric rifle of shadow mask type, once propose multiple measure and proofreaied and correct three electron beams, land exactly in each screen light powder in the heart even pass the electron beam of shadow cover hole.
Electron beam target proofread and correct and to have been undertaken by the deflection yoke system that is typically auto-convergence and pincushion zero deflection yoke system.
Unfortunately be that the screen of the color CRT of yi word pattern is flat more just can to cause the inconvenience relevant with vertical pincushion distortion more.In order to overcome this inconvenience, the beam landing bearing calibration of above-mentioned relevant technologies need be adopted multiple control board and magnet.Because localized distortion can cause the problem that image quality reduces, and manufacturing cost is improved.
Japan Patent openly flat-5-252525 discloses a kind of deflection yoke system that addresses the above problem.The preceding transposition arm of the vertical pincushion distortion that this deflection yoke system is included in the front court control board partly settled along the loudspeaker of the frame deflector coil of CRT screen diagonal, be used for corrected image and by with the vertical current circuit of the convergence error of the vertical direction of level of corrections deflection current and corrected image synchronously.
In this deflection yoke system, frame deflector coil is placed on 4 positions of loudspeaker part.
In order to proofread and correct this vertical pincushion distortion, also used another kind of method, make in the frame deflector coil of electric current permission that is obtained with horizontal cycle modulation parabolical electric current on the basis of vertical cycle and flow through at deflection yoke.
As mentioned above, need a kind of color cathode ray tube that can prevent to make the image quality reduction owing to vertical pincushion distortion, and a kind of as in the multiple means, adopted a kind of method, made the electric current that on the basis of vertical cycle, is obtained flow through frame deflector coil with horizontal cycle modulation parabolical electric current.
The advantage of the method is to be easier to realize, but because the frame deflector coil in the deflection yoke must add driving with low frequency, the number of turns of frame deflector coil is just very big, therefore can increase the impedance of frame deflector coil.
As a result, in deflection yoke, must on frame deflector coil, add high pressure, so that particular current flows in frame deflector coil.This just makes circuit structure complexity and manufacturing expenses improve.
One object of the present invention is to provide a kind of can realize the deflection yoke of parabolical electric current with low pressure in horizontal cycle, thereby simplifies circuit structure and reduce manufacturing expense.
In order to achieve the above object, according to an aspect of the present invention, provide a kind of deflection yoke, it comprises: horizontal deflection coil; Frame deflector coil; And the coil that is used to proofread and correct vertical pincushion distortion, this coil is located at a side of frame deflector coil; The coil that wherein is used to proofread and correct vertical pincushion distortion has a kind of like this coiling form, promptly makes its produce the magnetic field with field pattern identical with the field pattern of frame deflector coil.Be used to proofread and correct interior week of the more close deflection yoke of the comparable diametrically frame deflector coil in coiling position of the coil of vertical pincushion distortion.The number of turn that is used to proofread and correct the coil of vertical pincushion distortion can be less than the number of turn of frame deflector coil, thereby makes the electric current of vertical cycle easier in the coil midstream mistake that is used to proofread and correct vertical pincushion distortion.
In a preferred embodiment, frame deflector coil has the winding configuration of branch's coiling type, and the turn ratio that frame deflector coil and being used to is proofreaied and correct between the coil of vertical pincushion distortion in each winding slot is made as steady state value, perhaps, the coefficient that launches of Fuli's leaf of distributing of the winding of frame deflector coil and the coil that is used to proofread and correct vertical pincushion distortion is identical.
In another preferred embodiment, frame deflector coil has the winding configuration of annular, and the turn ratio that frame deflector coil and being used to is proofreaied and correct between the coil of vertical pincushion distortion in forming circular each arcuate region that has special angle θ with respect to deflection yoke axle center is made as steady state value, perhaps, the coefficient that launches of Fuli's leaf of distributing of the winding of frame deflector coil and the coil that is used to proofread and correct vertical pincushion distortion is identical.
According to the present invention with said structure, because the impedance that is used to proofread and correct the coil of vertical pincushion distortion can be lower than the impedance of frame deflector coil, and can flow with the parabolic electric current that low pressure is used in the horizontal cycle of proofreading and correct vertical pincushion distortion, thereby simplified circuit structure and reduced manufacturing expense.
Fig. 1 is a schematic section, and the necessary part according to an embodiment of deflection yoke of the present invention is shown;
Fig. 2 is a schematic section, and the necessary part of another embodiment of deflection yoke according to the present invention is shown.
Describe the preferred embodiments of the present invention with reference to the accompanying drawings in detail.
As a feature of deflection yoke of the present invention, be provided for proofreading and correct the coil of vertical pincushion distortion in a side of frame deflector coil.
Among Fig. 1, on behalf of deflection yoke, 2, label 1 be the lead of frame deflector coil for shim, 3, and 4 is the lead of correcting coil.
The coil that frame deflector coil shown in Figure 1 twines for branch's lead.
In the coil that branch twines, be provided for forming the shim 2 of winding slot in the inside of deflection yoke 1.
By with lead 3 in the vertical deflection yoke that the specific number of turn gets is contained in by a pair of shim 2 formed winding slots.
On the interior week of deflection yoke of the present invention shown in Figure 1, before frame deflector coil sequences, with previous good by the vertical pincushion correction coil arrangement of 4 coileds of lead.
By after winding,, can obtain same effect by lead 4 coiling vertical pincushion distortion correcting coils by 3 pairs of frame deflector coils of lead.
Turn ratio in each winding slot between frame deflector coil and the vertical pincushion distortion correcting coil is made as constant.
In addition, if turn ratio can not be made as steady state value by the restriction number of turn (impedance), will place the lead 4 of correcting coil, the coefficient that Fuli's leaf that the winding of frame deflector coil is distributed launches is identical with the vertical pincushion distortion correcting coil.
Fig. 2 is a schematic diagram, and the essential part of another embodiment of deflection yoke of the present invention is shown.In Fig. 2, on behalf of deflection yoke, 12 leads 13 for frame deflector coil, label 11 be the lead of correcting coil.
Frame deflector coil shown in Figure 2 has the winding construction of annular.
For Circular Winding, each frame deflector coil that lead 12 is obtained after the specific number of turn is installed on the deflection yoke 11.
On the interior week of deflection yoke of the present invention shown in Figure 2, before each the vertical pincushion correction coil that is obtained by lead 13 coilings was settling deflection to be rehoused before the circle partially.
Even for this deflection yoke, by after vertically compiling switch coil, obtaining same effect by lead 13 coiling vertical pincushion distortion correcting coils with lead 12 coilings.
In Circular Winding shown in Figure 2, have in the arcuate region of special angle θ at axle center with respect to deflection yoke 11, the turn ratio between frame deflector coil and the vertical pincushion distortion correcting coil is set at steady state value.
In addition, as branch's winding, if make above-mentioned turn ratio be set at steady state value by the restriction number of turn (impedance), then can be with lead 13 location of correcting coil, thus Fuli's leaf that the winding of frame deflector coil is distributed launches identical with the vertical pincushion distortion correcting coil.
Claims (5)
1. deflection yoke is characterized in that comprising:
Horizontal deflection coil;
Frame deflector coil; And
Be used to proofread and correct the coil of vertical pincushion distortion, this coil is located at a side of described frame deflector coil;
The described coil that wherein is used to proofread and correct vertical pincushion distortion has a kind of like this coiling form, promptly makes its produce the magnetic field with field pattern identical with the field pattern of described frame deflector coil.
2. deflection yoke as claimed in claim 1, the coiling position of described coil that it is characterized in that being used to proofreading and correct vertical pincushion distortion is diametrically than interior week of the more close described deflection yoke of described frame deflector coil.
3. deflection yoke as claimed in claim 1, the number of turn that it is characterized in that being used to proofreading and correct the described coil of vertical pincushion distortion is less than the number of turn of described frame deflector coil, thereby makes the electric current of vertical cycle easier in the described coil midstream mistake that is used to proofread and correct vertical pincushion distortion.
4. deflection yoke as claimed in claim 1, it is characterized in that described frame deflector coil has the winding configuration of branch's coiling type, and at frame deflector coil described in each winding slot and the turn ratio that is used to proofread and correct between the described coil of vertical pincushion distortion be made as steady state value, perhaps, the coefficient that launches of Fuli's leaf of distributing of the winding of described frame deflector coil and the described coil that is used to proofread and correct vertical pincushion distortion is identical.
5. deflection yoke as claimed in claim 1, it is characterized in that described frame deflector coil has the winding configuration of annular, and the turn ratio that described frame deflector coil and being used to is proofreaied and correct between the described coil of vertical pincushion distortion in forming circular each arcuate region that has special angle θ with respect to described deflection yoke axle center is made as steady state value, perhaps, the coefficient that launches of Fuli's leaf of distributing of the winding of described frame deflector coil and the described coil that is used to proofread and correct vertical pincushion distortion is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98125552 CN1224981A (en) | 1997-12-12 | 1998-12-12 | Deflection yoke |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP342369/97 | 1997-12-12 | ||
| CN 98125552 CN1224981A (en) | 1997-12-12 | 1998-12-12 | Deflection yoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1224981A true CN1224981A (en) | 1999-08-04 |
Family
ID=5229216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98125552 Pending CN1224981A (en) | 1997-12-12 | 1998-12-12 | Deflection yoke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1224981A (en) |
-
1998
- 1998-12-12 CN CN 98125552 patent/CN1224981A/en active Pending
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |