JPH07296744A - Color deflection yoke with electromagnetic convergence yoke - Google Patents

Abstract

PURPOSE:To provide such a color deflection yoke that is provided with an electromagnetic convergence yoke which is not affected on deflection magnetic field distribution of the color deflecting yoke. CONSTITUTION:Cores of an electromagnetic convergence yoke 10 are composed of E type core 11 and I type core, and a coil 13 is wound around the E type core 11 and the I type core 12. The first correction magnetic field having blue and red color shear, and the second correction magnetic field for correcting color shear of blue and red to green are generated from these coils 13 so that misconvergence is corrected by a digital or analog convergence method. The electromagnetic convergence yoke 10 is composed of unringed cores of E type core 11 and I type core 12 so that the cores 11, 12 do not become short ring of a magnetic field and even if the electromagnetic convergence yoke 10 is mounted on the neck side of a color deflection yoke, deflecting magnetic distribution of the color deflection yoke is not affected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color deflection yoke with an electromagnetic convergence yoke having an electromagnetic convergence yoke.

[0002]

2. Description of the Related Art Recently, with the increase in size of color television receivers and display devices and the increase in definition of screens, an electromagnetic convergence yoke is attached to the neck side of a color deflection yoke, and a cathode ray line is formed by a digital convergence method or an analog convergence method. A method that finely corrects the misconvergence (color shift) of the screen of the tube is being adopted.

In these digital and analog convergence methods, generally, an analog current is operated and supplied to a convergence correction coil which is connected to a circuit to correct misconvergence, or a screen of a cathode ray tube is divided into a plurality of sections. Then, the optimum correction amount of misconvergence when beam scanning each section is obtained in advance by using a personal computer or the like and stored in the memory, and when the actual color deflection yoke is driven, each section of the cathode ray tube screen is divided. A precise convergence correction is achieved by variably controlling the current applied to the coil of the electromagnetic convergence yoke by a digital signal or an analog signal so that the optimum correction amount stored in the memory can be adjusted according to the scanning. Is.

FIG. 16 shows an example of a conventional color deflection yoke with an electromagnetic convergence yoke. In the figure, the color deflection yoke 1 has a pair of horizontal deflection coils in the shape of a paddle arranged on the top side and the bottom side of the deflection yoke bobbin, and a pair of vertical deflection coils and a core are mounted outside the horizontal deflection coils. is there. Color deflection yoke 1
Is mounted on a cathode ray tube (not shown), and the deflection yoke 1 is fixed by fastening the tube portion 2 on the neck side to the tube shaft of the cathode ray tube (not shown) using a tightening band 3 or the like. Tube 2
The cylindrical holes of are the blue beam and the green beam emitted from the blue (green) electron gun and the green (green) electron gun and the red (red) electron gun, respectively, which are arranged inline inside the tube axis side of the cathode ray tube. It is the beam passage of the beam and the red beam.

An electromagnetic convergence yoke 4 of a digital convergence type or an analog convergence type is mounted on the neck side of the color deflection yoke 1. As shown in FIG. 15, the electromagnetic convergence yoke 4 is provided with a ring-shaped ring core 5 from the inner peripheral surface side 6
It is formed by projecting poles of 8 poles, 8 poles, or 12 poles in the center direction, and winding a coil 7 around this pole 6 so that a convergence correction magnetic field of 4 poles or 6 poles is generated.

In the color deflection yoke provided with this electromagnetic convergence yoke, when the color deflection yoke is driven,
By controlling the current supplied to the coil 7 by a digital or analog signal, a magnetic field for correcting the misconvergence of the blue beam and the red beam from the magnetic pole 6 and a convergence correcting magnetic field for correcting the color shift of the green beam with respect to the blue beam and the red beam. Is generated and the magnitude of the correction magnetic field is variably controlled for each scanning section of the cathode ray tube, so that fine misconvergence can be corrected and a high-definition screen can be obtained.

[0007]

As is well known, as shown in FIG. 14, the distribution of the deflection magnetic field at the time of driving the color deflection yoke is, for example, in the case of a general saddle type deflection coil, the color deflection yoke 1 The pin magnetic field is distributed in the central area of the color deflection yoke, and the leakage magnetic field of the barrel magnetic field is generated from the neck side end of the color deflection yoke 1 to the rear side. In the color deflection yoke of the type in which the electromagnetic convergence yoke 4 is not provided, The convergence characteristic is adjusted in the state of the magnetic field distribution of the color deflection yoke shown in FIG.

With the convergence characteristics adjusted as described above, the electromagnetic convergence yoke 4 is used in order to adopt a digital or analog convergence method.
When you try to install the electromagnetic convergence yoke 4
Since the ring core 5 of FIG. 14 functions as a magnetic field short ring, the leakage magnetic field on the rear side of the neck end of the color deflection yoke 1 shown in FIG. 14 is shunted, and as a result, the barrel magnetic field of the neck side of the color deflection yoke 1 is reduced. Since the distribution is weakened, before the electromagnetic convergence yoke 4 is attached, the one having the convergence characteristic as shown in FIG. 13 (a) is, for example, blue as shown in FIG. 13 (b). There is a misconvergence such that the sensitivity of the green beam G is lowered with respect to the beam B and the red beam R, and the green beam G is displaced vertically inward with respect to the red and blue beams. There is a problem that misconvergence occurs such that the red beam R and the blue beam B shift to the left and right sides in an arc shape.

Therefore, in the conventional color deflection yoke with the electromagnetic convergence yoke, the misconvergence is not adjusted before the electromagnetic convergence yoke 4 is attached, but after the electromagnetic convergence yoke 4 is attached and fixed to the color deflection yoke 1. Adjusting the convergence characteristics is an essential requirement. Also, after the electromagnetic convergence yoke 4 is attached to the color deflection yoke 1 and the convergence characteristics are adjusted, if the electromagnetic convergence yoke 4 is removed, the convergence characteristics will be changed again. Therefore, the electromagnetic convergence yoke 4 should be removed once it is attached. It is an indispensable condition not to do. As described above, since the conventional electromagnetic convergence yoke 4 uses the ring core 5, the ring core 5 acts as a short ring of the magnetic field, so that the magnetic field distribution of the color deflection yoke 1 before and after the electromagnetic convergence yoke 4 is inevitably attached. Because it changes
In the conventional example, there is an inconvenience that the deflection magnetic field distribution is always adjusted with the electromagnetic convergence yoke 4 attached, and after the adjustment, the convergence yoke cannot be attached or detached as needed.

Further, since the conventional deflection yoke with an electromagnetic convergence yoke always requires the ring core 5 for the above reason, it is not possible to remove and use only the convergence yoke according to the user's needs, which increases the cost accordingly. There was a problem.

The present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to prevent the magnetic field distribution of the deflection yoke from being affected by the attachment / detachment of the electromagnetic convergence yoke, and to provide an FC core or the like. An object of the present invention is to provide a color deflection yoke with an electromagnetic convergence yoke that includes an electromagnetic convergence yoke that can share a part of the convergence score, is easy to manufacture, and is inexpensive.

[0012]

In order to achieve the above object, the present invention is constructed as follows. That is, the present invention is a color deflection yoke with an electromagnetic convergence yoke in which an electromagnetic convergence yoke for correcting misconvergence is mounted on the neck side of the color deflection yoke, wherein the electromagnetic convergence yoke is a blue beam on the neck side of the color deflection yoke. It is formed by arranging a non-ring-shaped core across the beam path through which the green beam and red beam pass, and this core has the first and the first to correct vertical and horizontal misconvergence of the blue and red beams. A coil for generating at least one of the correction magnetic field and a second correction magnetic field for correcting at least one of vertical and horizontal misconvergence of the green beam with respect to the red and blue beams is wound. Is configured.

The non-ring-shaped core has one or more of an E-shaped core, a U-shaped core, and an I-shaped core vertically or horizontally in one or both directions with a beam passage interposed therebetween, with the beam passage interposed therebetween. The first correction magnetic field is 4
By the magnetic field of the poles, the second correction magnetic field is formed by the magnetic field of 6 poles, and the non-ring-shaped core moves the blue beam, the green beam, and the red beam together in at least one of the vertical direction and the horizontal direction. The addition of a coil for generating a correction magnetic field and the winding and addition of an FC coil around the non-ring-shaped core are also features of the present invention.

[0014]

In the present invention having the above-described structure, when the color deflection yoke is driven, the current of the coil wound around the non-ring-shaped core is controlled by, for example, the digital convergence method or the analog convergence method to control the first current. Either or both of the correction magnetic field and the second correction magnetic field are generated, and the convergence correction due to the deviation of the blue beam and the red beam and the convergence correction of the deviation of the green beam with respect to the red and blue beams are performed.

In the present invention, since the core of the electromagnetic convergence yoke has a non-ring shape, even if this core is attached to the color deflection yoke, it does not become a magnetic field short ring. The convergence characteristic of the color deflection yoke can be adjusted by a digital or analog convergence method without affecting the distribution at all.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. The configuration of the color deflection yoke itself of this embodiment is the same as that of the conventional example, and is formed by combining a horizontal deflection coil, a vertical coil and a core, and the same parts as those of the conventional color deflection yoke are designated by the same reference numerals. It demonstrates using. A characteristic of this embodiment different from the conventional example is that the electromagnetic convergence yoke mounted on the neck side of the color deflection yoke has a unique structure. FIG. 1 shows various examples in which a characteristic electromagnetic convergence yoke 10 is mounted on the neck side of the color deflection yoke of this embodiment. In this electromagnetic convergence yoke 10, a pair of E-shaped cores 11 are vertically arranged so as to sandwich the tubular portion 2 of the color deflection yoke, which is the beam passage, and a pair of I-shaped cores (bar-shaped cores) are provided on both left and right sides of the tubular portion 2. ) 12 are opposed to each other to form a non-ring-shaped core.

In this embodiment, (a) and (b) of FIG.
A coil 13 for convergence correction is wound around the E-type core 11 and the I-type core 12 so that both the solid and broken line correction magnetic fields as shown in FIG. The winding position of the coil 13 can take various forms. For example, as shown in FIG. 1 (a), the base portions 13a and 13b of the E-shaped core 11 and the I-shaped core 12 can be wound.
Each of the coils 13 may be wound so as to generate a 4-pole correction magnetic field as shown in FIG. 2 (a) and a 6-pole correction magnetic field as shown in FIG. 2 (b). (B), the coil 13 may be additionally wound around the outer magnetic legs 13c and 13d of the E-shaped core 11, or
As shown in FIG. 1C, the central magnetic leg 13e of the E-shaped core 11
The coil 13 may be wound around the outer end magnetic legs 13c and 13d of the E-shaped core 11 as shown in FIG.
The coil 13 may be wound around the central magnetic leg 13e, and the winding position of the coil 13 is not particularly limited.
Two kinds of quadrupole correction magnetic fields shown by a solid line and a broken line as shown in FIG. 2A by winding the coil 13 at appropriate positions on the outer magnetic legs 13a and 13b, the outer magnetic legs 13c and 13d, and the central magnetic leg 13e. Then, the coil 13 is wound around the E-type core 11 and the I-type core 12 so as to generate two types of 6-pole correction magnetic fields as shown in FIG.

The quadrupole correction magnetic field shown in FIG. 2 (a) is the first correction magnetic field for correcting the misconvergence between the blue beam and the red beam, and the quadrupole correction magnetic field shown by the solid line is 4 (a) corrects the vertical misconvergence of the blue beam B and the red beam R on the screen, and the left hand of Fleming with respect to the direction of the correction magnetic field shown in FIG. 3 (a). The upward force F acts on the blue beam B and the red beam R
A downward force F acts on the green beam G, and almost no force acts on the green beam G. Therefore, as shown in FIG. 4A, the red beam R is displaced upward with respect to the blue beam B, thereby correcting misconvergence. By reversing the connection direction of the coil 13 and reversing the polarity, the direction of the correction magnetic field is reversed, and the misconvergence of the pattern opposite to that of FIG. A correction of misconvergence in which is shifted below the blue beam B is achieved.

The quadrupole correction magnetic field shown by the broken line in FIG. 2 (a) corrects the lateral deviation between the blue beam B and the red beam R as shown in FIG. 3 (b). Figure 3
As shown in (b) of FIG.
As a result, a rightward force acts on the red beam R when viewed from the tube surface side of the cathode ray tube, and a rightward force acts on the red beam R. As a result, a blue beam B as shown in FIG. Correction of misconvergence which is shifted to the right side will be achieved, and by reversing the polarity by reversing the connection direction of the coil 13, the direction of the correction magnetic field will be reversed,
The misconvergence of the pattern opposite to the pattern shown in FIG. 4B, that is, the misconvergence in which the red beam R is shifted to the right of the blue beam B, is achieved.

The solid line and broken line 6-pole correction magnetic field shown in FIG. 2B is a second correction magnetic field for correcting the relative positional deviation of the green beam G with respect to the blue beam B and the red beam R, and is shown by the solid line. In the case of the 6-pole correction magnetic field shown in FIG.
As shown in FIG. 6A, the rightward force acts on both the blue beam B and the red beam R, so that the blue beam B and the red beam are different from the green beam G as shown in FIG. Correction of misconvergence in which both R are shifted to the left when viewed from the tube surface side of the cathode ray tube is achieved, and by reversing the connection direction of the coil 13 and reversing the direction of the correction magnetic field, A pattern opposite to the misconvergence pattern shown in (a), that is, the misconvergence correction in which the blue beam B and the red beam R are displaced to the right side of the green beam G, is achieved.

Further, in the case of the 6-pole correction magnetic field shown by the broken line in FIG. 2B, both the blue beam B and the red beam R are directed downward as shown in FIG. 5B. As a result of the force acting, as shown in FIG. 6B, the misconvergence in which both the blue beam B and the red beam R are displaced upward with respect to the blue beam G is corrected. Further, by reversing the connection direction of the coil 13 and reversing the polarity, the direction of the correction magnetic field is also reversed. In this case, as shown in FIG.
(B), the pattern opposite to the misconvergence, that is, the correction of the misconvergence in which both the blue beam B and the red beam R are shifted downward with respect to the green beam G is achieved.

In this embodiment, the core of the electromagnetic convergence yoke is a non-ring-shaped core by combining the E-shaped core 11 and the I-shaped core 12, so that these cores 11 and 12 form a magnetic field short ring. Therefore, even if the electromagnetic convergence yoke of this embodiment is mounted on the color deflection yoke, the deflection magnetic field of the color deflection yoke is not affected. Therefore, since the leakage magnetic field on the rear side of the neck end of the color deflection yoke 1 as shown in FIG. 14 is not cut, the attachment / detachment of the electromagnetic convergence yoke 10 does not affect the magnetic field distribution characteristics of the color deflection yoke. , It does not affect the characteristics of the color deflection yoke itself. Therefore, when designing the color deflection yoke, the magnetic field distribution of the deflection magnetic field can be designed regardless of the presence or absence of the electromagnetic convergence yoke, and by mounting the electromagnetic convergence yoke 10 of the embodiment on the color deflection yoke, It is possible to effectively correct the misconvergence of the blue beam B and the red beam R and the misconvergence due to the relative displacement of the green beam G with respect to the blue beam B and the red beam R without affecting the deflection magnetic field of the deflection yoke at all. .

Further, in the conventional example, when the electromagnetic convergence yoke is attached or detached, there arises a problem that the magnetic field distribution of the color deflection yoke is changed and the characteristics of the deflection yoke are changed. Therefore, the electromagnetic convergence yoke is attached to the color deflection yoke. In this state, the magnetic field distribution of the color deflection yoke was designed, and the electromagnetic convergence yoke mounted on the color deflection yoke could not be removed and used.However, in this embodiment, the color deflection is achieved by attaching and detaching the electromagnetic convergence yoke. Since the distribution of the deflection magnetic field of the yoke is not affected, it is possible to obtain the convenience that the use of the electromagnetic convergence yoke can be freely selected. For example, in the case of a relatively loose specification with a misconvergence of 0.3 mm or less, even if the electromagnetic convergence yoke is not used, the electromagnetic convergence yoke is not attached to the color deflection yoke when it is within the standard of this misconvergence. Can be shipped as a product to. On the other hand, for example, in the case of a strict standard such as a misconvergence standard of 0.1 mm or less, there is room for selective use of the electromagnetic convergence yoke in which the electromagnetic convergence yoke mounted on the color deflection yoke can be shipped as a product. Will be born.

The core of the electromagnetic convergence yoke of this embodiment can be formed into an E-shaped or I-shaped core shape, and the E-shaped or I-shaped core shape is extremely easily formed by sintering ferrite or pressing. Therefore, as compared with the conventional ring-shaped core, its manufacture is easier and the manufacturing cost can be reduced.

The present invention is not limited to the above-mentioned embodiment, and various embodiments can be adopted. For example, in the above-described embodiment, the E-shaped cores 11 are arranged facing each other on the upper and lower sides with the blue, green, and red beam passages sandwiched therebetween, and the I-shaped cores 12 are arranged opposite to each other in the direction orthogonal thereto, but the contrary, As shown in FIG. 7, the E-shaped cores 11 are arranged opposite to each other across the beam passage, and the I-shaped cores are arranged in a vertical direction orthogonal to the E-shaped cores 11.
The 12 may be arranged to face each other to form an electromagnetic convergence yoke. Also in this case, the coil 13 can be provided at various desired positions as illustrated.

Although the electromagnetic convergence yoke 10 is formed by combining the E-shaped core 11 and the I-shaped core 12 in FIGS. 1 and 7, the E-shaped core 16 is replaced by a U-shaped core 16 as shown in FIG. And the I-type core 12A are combined, and the E-type core 11 is obtained by combining the cores 16 and 12A.
You may make it have the same function as.

Further, in the above-described embodiment, the electromagnetic convergence yoke is used to form the first correction magnetic field of four poles each having a solid line and a broken line as shown in FIG. 2A and a solid line as shown in FIG. 2B. The second correction magnetic field of the six poles of the broken line and the broken line is generated together, but the solid line of FIG.
2 may be generated, or only one or both of the solid and broken lines in FIG. 2B may be generated. Further, a quadrupole correction magnetic field having a solid line and a broken line shown in FIG.
As shown in (b) of the same figure, a magnetic field that is a combination of a solid line or a broken line and 6 poles of the second correction magnetic field is generated, that is, 2 types of 4 poles of the first correction magnetic field and 6 poles of 1 The coil 13 may be wound so that the second kind of second correction magnetic field is generated.

Further, in the above embodiment, the electromagnetic convergence for generating the correction magnetic field of 4 poles and the correction magnetic field of 6 poles has been described as an example. However, as shown in FIG. 9, for example, as shown in FIG. An electromagnetic convergence yoke may be constructed by adding a coil 15 for generating a correction magnetic field having two poles in one or both directions. In this case, the coil 13 for generating the correction magnetic fields of 4 poles and 6 poles is overlapped with the coil 15 for generating the correction magnetic field of 2 poles.
As shown in FIG. 10, 15 can also be configured to be polarized and wound on multiple poles of the core. If the coil 15 is wound so as to generate a vertical correction magnetic field, the blue beam B, the green beam G, and the red beam R can be moved together in the left-right direction, and the two beams can be arranged in the left-right direction. If a magnetic field is generated, the blue beam B, the green beam G, and the red beam R can be vertically moved together.

Further, as shown in FIG. 11, an FC (Field Control) coil 14 for green sensitivity correction may be added. By adding the FC coil 14, the green sensitivity can be adjusted, and the narrow direction of the green beam G with respect to the blue beam B and the red beam R (the green beam G is vertically above and below the blue beam B and the red beam R on the screen). It is possible to correct misconvergence in which the green beam G misaligns in the wide direction and misconvergence in the wide direction (misconvergence in which the green beam G is vertically displaced from the blue beam B and the red beam R).

Further, in the above description of each case, all the polarities of the core have been described as being of 8 poles type, but the core polarity of the electromagnetic convergence yoke 10 is not limited to 8 poles, but 4 to 5 poles. It can be formed into an even number of poles according to the specifications of 12 poles. 12A shows a U-shaped core 16 and an E-shaped core 11 combined to have a core polarity of 10 poles, and FIG. 12B shows a case where only the E-shaped core 11 is used and the core polarity is 12. (C) in the figure is a U-shaped core 16 and an I-shaped core.
12 cores are combined to have a 6-pole core polarity, and FIG. 9D shows a 4-pole core polarity using only the U-shaped core 16.

The structure with more core polarities, such as 10 poles and 12 poles, is a little more complicated than the others, but the more polar, the more
Moreover, the more the crotch of the same pole around the cores, the better the magnetic field formation. Further, it is sufficient to generate only the 6-pole second correction magnetic field or the 6-pole second correction magnetic field and the 2-pole correction magnetic field for correcting the misconvergence of the red beam R and the blue beam B with respect to the green beam G. In this case, the core polarity of 6 poles shown in (c) of FIG. 12 may be used, and when only the first correction magnetic field of 4 poles needs to be generated, the U-shape shown in (d) of FIG. The shape core 16 alone may have a 4-pole core polarity, and may have an even-core polarity of 4 poles or more according to the specifications.

Further, in the embodiment, the current supply drive source of the coil 13 of the electromagnetic convergence yoke 10 is provided separately from the current supply drive source of the deflection coil, but when the analog convergence system is adopted, the horizontal deflection coil is used. The vertical deflection coil and the vertical deflection coil may be used as a current supply driving source to supply the currents of the horizontal deflection coil and the vertical deflection coil to the coil 13 through appropriate circuit elements.

[0033]

According to the present invention, the core of the electromagnetic convergence yoke mounted on the neck side of the color cathode ray tube has a non-ring shape. Therefore, even when the electromagnetic convergence yoke is mounted on the color deflection yoke, the core is not changed. Since it does not function as a magnetic field short ring, it does not affect the distribution of the deflection magnetic field of the color deflection yoke.

As described above, since the magnetic field distribution of the color deflection yoke is not affected by the attachment / detachment of the electromagnetic convergence yoke, the magnetic field distribution of the color deflection yoke can be set regardless of the presence or absence of the electromagnetic convergence yoke. The convenience is obtained. Moreover, since the distribution of the deflection magnetic field of the color deflection yoke is not affected by the attachment / detachment of the electromagnetic convergence yoke, it is possible to use it by removing the electromagnetic convergence yoke from the color deflection yoke equipped with the electromagnetic convergence yoke. It is also possible to newly attach an electromagnetic convergence yoke to a color deflection yoke that is not provided, and to use the electromagnetic convergence yoke.

Furthermore, since the non-ring-shaped core of the electromagnetic convergence yoke can be formed by using an I-shaped core, an E-shaped core, etc., the core shape is simple and can be easily formed by pressing or the like. Manufacture becomes easy, and the production cost can be reduced accordingly.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing various structural examples of a color deflection yoke with an electromagnetic convergence yoke according to the present invention as viewed from the neck side of the color deflection yoke.

FIG. 2 is an explanatory diagram showing an example of the form of a correction magnetic field of an electromagnetic convergence yoke.

FIG. 3 is an explanatory diagram of a correction mode of misconvergence of a blue beam B and a red beam R by a correction magnetic field of an electromagnetic convergence yoke in the present embodiment.

FIG. 4 is an explanatory diagram of a misconvergence pattern of a blue beam B and a red beam R appearing on a screen of a cathode ray tube and a correction example thereof.

FIG. 5 is an explanatory diagram of a 6-pole correction magnetic field in the present embodiment.

FIG. 6 is an explanatory diagram of an example of a pattern of occurrence of misconvergence of a green beam G with respect to a blue beam B and a red beam R and a correction mode thereof.

FIG. 7 is an explanatory diagram showing another arrangement mode of the E-type core and the I-type core of the electromagnetic convergence yoke.

FIG. 8 is an explanatory diagram of an embodiment in which an electromagnetic convergence yoke is formed by a U-shaped core and an I-shaped core.

FIG. 9 is an explanatory diagram of an example in which a coil for generating a two-pole correction magnetic field is added to the electromagnetic convergence yoke.

FIG. 10 is an explanatory diagram of another winding example of a coil that generates a two-pole correction magnetic field.

FIG. 11 is an explanatory diagram of an embodiment in which an FC coil is added to the electromagnetic convergence yoke.

FIG. 12 is an explanatory diagram of various forms of an electromagnetic convergence yoke having a core polarity other than 8 poles.

FIG. 13 is an explanatory diagram of a conventional example showing an example of a change in convergence characteristic caused by attachment / detachment of an electromagnetic convergence yoke.

FIG. 14 is an explanatory diagram of a magnetic field distribution of a saddle type deflection coil in a general color deflection yoke.

FIG. 15 is an explanatory diagram of a conventional electromagnetic convergence yoke.

FIG. 16 is an explanatory diagram of a color deflection yoke including a conventional electromagnetic convergence yoke.

[Explanation of symbols]

 1 Color deflection yoke 10 Electromagnetic convergence yoke 11 E-type core 12 I-type core 13 Coil

Claims (5)

[Claims] 1. A color deflection yoke with an electromagnetic convergence yoke in which an electromagnetic convergence yoke for correcting misconvergence is mounted on the neck side of the color deflection yoke, wherein the electromagnetic convergence yoke is a blue beam and green on the neck side of the color deflection yoke. It is formed by arranging a non-ring-shaped core across the beam path through which the beam and the red beam pass, and this core corrects the vertical and horizontal misconvergence of the blue and red beams. A coil for generating at least one of a magnetic field and a second correction magnetic field for correcting misconvergence in at least one of the vertical and horizontal directions of the green beam with respect to the red and blue beams is wound. With characteristic electromagnetic convergence yoke Color deflection yoke. 2. The non-ring-shaped core faces one or more of an E-shaped core, a U-shaped core, and an I-shaped core in one or both of the upper and lower sides and the left and right with the beam passage interposed therebetween, with the beam passage interposed therebetween. A color deflection yoke with an electromagnetic convergence yoke according to claim 1, wherein the color deflection yoke is formed by being formed. 3. The first correction magnetic field is a 4-pole magnetic field,
The second correction magnetic field is formed by a magnetic field having 6 poles.
Alternatively, the color deflection yoke with the electromagnetic convergence yoke according to claim 2. 4. A non-ring-shaped core is provided with a coil for generating a two-pole correction magnetic field for moving a blue beam, a green beam and a red beam in at least one of a vertical direction and a horizontal direction. A color deflection yoke with an electromagnetic convergence yoke according to claim 1, 2 or 3. 5. The color deflection yoke with an electromagnetic convergence yoke according to any one of claims 1 to 4, wherein an FC coil is wound around and attached to a non-ring-shaped core.