JP2001256905A - Deflecting yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deflecting yoke for uniformly correcting the distortion of upper and lower pins for three electron beams, R, G, B and sufficiently improving the quality of a picture. SOLUTION: A pair of a rod magnetic substances 10a, 10b are opposed to each other from side to side corresponding to the array of three red, green and blue electron beams R, G, B emitted from an electron gun in in-line array. A pair of U-shaped magnetic substances 12a, 12b are opposed to each other up and down perpendicularly to the array of the three electron beams R, G, B. Auxiliary coils C1, C2,..., C6 are wound around, and connected in series to, the total six ends of the pair of rod magnetic substances 10a, 10b and the pair of U-shaped magnetic substances 12a, 12b. A vertical saw-tooth-wave current is carried in these auxiliary coils C1, C2,..., C6 to form sextuple poles which generate almost uniform vertical correcting magnetic fields operating on the three electron beams R, G, B with almost equal strength.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke, and more particularly to a deflection yoke used for an image display device using an in-line type color cathode ray.

[0002]

2. Description of the Related Art Conventionally, in an image display device using an in-line type color cathode ray, variations in upper and lower pins have been caused by upper and lower pin correction magnets of a deflection yoke and winding distribution of a vertical deflection coil. To correct such vertical pin distortion, a horizontal parabolic current modulated in a vertical cycle is superimposed on a vertical sawtooth current in a vertical deflection coil of a deflection yoke.

However, using such a correction method,
In the case of a multi-scan signal where the horizontal deflection frequency changes,
There is a disadvantage that it is difficult to make the same correction amount. In addition, there is a disadvantage that a circuit for superimposing a horizontal parabolic current modulated in a vertical cycle on a vertical sawtooth current becomes complicated and costs increase.

For this reason, a method has been proposed in which an auxiliary coil is arranged on a deflection yoke and a vertical sawtooth current is applied to the auxiliary coil to correct vertical pin distortion. Hereinafter, a method of correcting upper and lower pin distortion using the auxiliary coil will be described with reference to FIG. Here, FIG.
It is the schematic which looked at (Cathode Ray Tube; cathode ray tube) from the side.

That is, as shown in FIG.
At T, a deflection yoke is provided with a core 20 and a vertical deflection coil 22 to deflect an electron beam emitted from an electron gun (not shown) and draw a predetermined trajectory to draw a fluorescent screen 24.
Is made to enter. And these core 2
On the electron gun side of the zero and vertical deflection coils 22, that is, on the neck side of the deflection yoke, an auxiliary coil 26 as a vertical correction magnetic field generating means is provided.

The trajectory of the electron beam when the current of the vertical deflection cycle is not supplied to the auxiliary coil 26 and no vertical correction magnetic field is generated is indicated by a symbol A. On the other hand, when a current having a predetermined vertical deflection cycle is caused to flow through the auxiliary coil 26 to generate a vertical correction magnetic field in the same direction as the vertical deflection magnetic field generated by the vertical deflection coil 22, the trajectory of the electron beam is indicated by the symbol B. To change. When a current having a predetermined vertical deflection cycle is caused to flow in the opposite direction to the auxiliary coil 26 to generate a vertical correction magnetic field in the direction opposite to the vertical deflection magnetic field generated by the vertical deflection coil 22, the trajectory of the electron beam is indicated by reference character C. To change.

When the trajectory of the electron beam changes due to the vertical correction magnetic field generated by the auxiliary coil 26, the angle of incidence θ when the electron beam is incident on the phosphor screen 24 changes in accordance with the change. For example, as shown in FIG.
Is the largest, and in the case of the trajectory of the electron beam indicated by the reference numeral A, it becomes smaller in the order of the trajectory of the electron beam indicated by the reference sign C.

When the incident angle θ of the electron beam on the fluorescent screen 24 is relatively large, the vertical pin distortion becomes small, and when the incident angle θ on the fluorescent screen 24 is relatively small, the vertical pin distortion becomes large. Tend to be. For this reason, the vertical correction magnetic field is generated using the auxiliary coil 26, and at the same time, the current flowing through the auxiliary coil 26 is controlled to adjust the direction and intensity of the vertical correction magnetic field, thereby changing the trajectory of the electron beam. As a result, the incident angle θ with respect to the fluorescent screen 24 can be controlled, so that vertical pin distortion can be corrected.

Next, a specific example of a method of correcting upper and lower pin distortion using such an auxiliary coil will be described with reference to FIGS. Here, FIGS. 5 and 6 are views of the vertical correction magnetic field generating means of the deflection yoke as viewed from the electron gun side.
FIG. 5 shows how a vertical correction magnetic field is generated when a quadrupole auxiliary coil is used, and FIG. 6 shows how a vertical correction magnetic field is generated when a double pole auxiliary coil is used.

One specific example is shown in FIG.
Three electron beams R, G, B of red (Red), green (Green), and blue (Blue) emitted from an inline array electron gun
A pair of U-shaped magnetic bodies 30a, 3
0b are arranged to face each other in the vertical direction. The auxiliary coil C1 is attached to each of two ends of the pair of U-shaped magnetic bodies 30a and 30b, that is, a total of four ends.
1, C12, C13 and C14 are connected in series and wound.

Now, these auxiliary coils C11, C1
When a current having a predetermined vertical deflection cycle, for example, a vertical sawtooth current is applied to C2, C13 and C14, N poles are formed by the auxiliary coils C12 and C13 close to the electron beam R, and the auxiliary coils C11 and C14 close to the electron beam B. Thus, an S pole is formed. And these auxiliary coils C12, C13
A vertical correction magnetic field as schematically shown by long arrows in FIG. 5 is generated by the N-pole and S-pole quadrupoles formed by the auxiliary coils C11 and C14.

However, these three electron beams R, G,
The vertical correction magnetic field for correcting the vertical deflection of B is applied to the electron beams R, B (hereinafter, appropriately referred to as “side beams R, B”) forming side beams among the three electron beams R, G, B. And acts relatively weakly on the electron beam G forming the center beam (hereinafter, appropriately referred to as “center beam G”). In FIG. 5, the magnitude of the vertical correction magnetic field acting on the three electron beams R, G, and B is schematically represented by the length of an arrow added near the three electron beams R, G, and B. It will be expressed as

For this reason, the auxiliary coils C11, C12, C
13, when correcting top and bottom pin distortion using C14, 3
As the electron beams R, G, and B of the book are deflected up and down, the center beam G is shifted outward as compared with the side beams R and B, and the convergence (convergence) occurs.
(gence) occurs.

In another specific example, as shown in FIG. 6, a pair of rod-like rods R, G and B emitted from an in-line arrangement electron gun coincide with the arrangement direction of the electron beams. The magnetic bodies 32a and 32b are arranged facing each other in the left-right direction. The pair of rod-shaped magnetic bodies 32a, 32b
, Ie, two ends in total, auxiliary coils C21 and C22 are wound in series connection.

Now, these auxiliary coils C21, C22
When a current having a predetermined vertical deflection cycle, for example, a vertical sawtooth current is supplied to the auxiliary coil C21 near the electron beam R, an N pole is formed, and the auxiliary coil C22 near the electron beam B is formed.
Thus, an S pole is formed. Then, two of the N pole and the S pole formed by these auxiliary coils C21 and C22 are formed.
The heavy pole generates a vertical correction magnetic field as schematically represented by a long arrow in FIG.

However, these three electron beams R, G,
The vertical correction magnetic field for correcting the vertical deflection of B acts relatively strongly on the side beams R and B of the three electron beams R, G and B, and relatively acts on the center beam G. Acts weakly. In FIG. 6, the magnitude of the vertical correction magnetic field acting on the three electron beams R, G, and B is 3
The electron beams R, G, and B are schematically represented by the lengths of arrows added near the electron beams.

For this reason, when correcting the vertical pin distortion using the auxiliary coils C21 and C22, as the three electron beams R, G and B are deflected up and down, they are compared with the side beams R and B. As a result, the center beam G is shifted inward, and a convergence shift occurs.

[0018]

As described above, when correcting vertical pin distortion using the conventional auxiliary coil, the auxiliary coils C11, C12, C13, C14 forming the quadrupole are used.
When a vertical correction magnetic field is generated by
Even when the vertical correction magnetic field is generated by the auxiliary coils C21 and C22 forming the heavy poles, the action of the vertical correction magnetic field on the three electron beams R, G, and B causes the effect between the side beams R, B and the center beam G. , And a convergence shift occurs, so that it is impossible to uniformly correct the upper and lower pin distortions for the three electron beams R, G, and B.

That is, a difference occurs in the correction amount of the vertical pin distortion for the three electron beams R, G, and B, especially between the side beams R and B and the center beam G. R, G, and B are not uniformly corrected,
There was a problem that a sufficient improvement in image quality performance was not achieved.

Accordingly, the present invention has been made in view of the above problems, and performs uniform correction of upper and lower pin distortions for three electron beams R, G, and B to sufficiently improve image quality. It is an object to provide a deflection yoke that can be realized.

[0021]

The above object is achieved by the following deflection yoke according to the present invention. That is, the deflection yoke according to the first aspect is a deflection yoke for deflecting three electron beams emitted from an in-line arrayed electron gun. An auxiliary coil that forms a quadrupole is arranged. Of these hexapoles, a triple pole near one side beam of the three electron beams forms an N pole, and a triple pole near the other side beam forms an S pole. It is characterized by being poled.

As described above, in the deflection yoke according to the first aspect, the auxiliary coil surrounds three electron beams.
A quadrupole is formed. Of these hexapoles, a triple pole near one side beam of the three electron beams forms an N pole, and a triple pole near the other side beam forms an S pole. This makes it possible to generate a vertical correction magnetic field that acts on the three electron beams almost uniformly, so that uniform three-dimensional electron beam distortion of the upper and lower pins can be obtained without generating a convergence deviation. By performing the correction, the image quality performance is sufficiently improved.

According to a second aspect of the present invention, there is provided a deflection yoke for deflecting three electron beams emitted from an in-line arrayed electron gun, wherein the deflection yoke is orthogonal to the direction in which the three electron beams are arrayed. For example, a pair of U-shaped magnetic bodies arranged vertically opposite to each other, and a pair of rod-shaped magnetic bodies arranged opposite to each other in a direction coinciding with the arrangement direction of the three electron beams, for example, the left-right direction. A magnetic body provided on the neck side of the deflection yoke, four ends of a pair of U-shaped magnetic bodies,
An auxiliary coil is connected in series to two ends of a pair of rod-shaped magnetic bodies and wound, and a total of six ends of a pair of U-shaped magnetic bodies and a pair of rod-shaped magnetic bodies are provided. A hexapole surrounding three electron beams is formed by an auxiliary coil wound in series and connected to the first coil.

As described above, in the deflection yoke according to the second aspect, the four ends of the pair of U-shaped magnetic members arranged in the vertical direction orthogonal to the arrangement direction of the three electron beams are provided. A quadrupole formed by an auxiliary coil wound in series and a pair of rod-shaped magnetic bodies arranged in a left-right direction facing the arrangement direction of the three electron beams; A hexapole is formed by combining with a double pole formed by an auxiliary coil wound at an end, so that a substantially uniform vertical beam which acts substantially uniformly on three electron beams is formed. A correction magnetic field is obtained.

That is, only the auxiliary coil forming the quadrupole has a vertical correction that relatively weakly acts on the side beam and relatively strongly acts on the center beam among the three electron beams. Only the magnetic field can be generated, and only the auxiliary coil forming the double pole generates a vertical correction magnetic field that acts relatively strongly on the side beam and relatively weakly acts on the center beam. However, by combining these quadrupoles and dipoles, the strength of the vertical correction magnetic field acting on the three electron beams is complemented, and the three electron beams act on the three electron beams with substantially uniform intensity. A substantially uniform vertical correction magnetic field can be obtained. For this reason, it is possible to sufficiently correct the upper and lower pin distortions of the three electron beams without causing a convergence deviation, and to sufficiently improve the image quality performance.

The deflection yoke according to claim 3 is the deflection yoke according to claim 2, which is closer to one side beam of the three electron beams among the six poles surrounding the three electron beams. With the configuration in which the triple pole forms an N-pole and the triple pole near the other side beam forms an S-pole, it acts substantially uniformly on the three electron beams in the second aspect. Since the effect of generating a substantially uniform vertical correction magnetic field is easily exhibited, uniform image distortion correction is performed on the three electron beams without causing a deviation in convergence, and sufficient image quality performance is achieved. Is achieved.

[0027]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described. FIG. 1 is a schematic diagram of the vertical correction magnetic field generation means of the deflection yoke according to one embodiment of the present invention as viewed from the electron gun side, and FIG. 2 is a diagram showing the connection of the vertical correction magnetic field generation means of the deflection yoke shown in FIG. FIG.
FIG. 3 is an operation explanatory diagram for explaining how the vertical correction magnetic field generation means of the deflection yoke shown in FIG. 1 generates a vertical correction magnetic field.

As shown in FIG. 1, in the vertical correction magnetic field generation means of the deflection yoke according to the present embodiment, three electron beams R of red, green and blue emitted from an in-line array electron gun are used. A pair of bar-shaped magnetic bodies 10a and 10b are arranged to face each other in the left-right direction in accordance with the arrangement direction of G and B. Also, a pair of U-shaped magnetic bodies 12a, 12b orthogonal to the arrangement direction of these three electron beams R, G, B are provided.
Are arranged facing each other in the vertical direction.

Then, the pair of rod-shaped magnetic bodies 10a,
10b, and a pair of U-shaped magnetic bodies 12a, 1b.
Auxiliary coils C1, C2,..., C6 are wound in series at two ends of 2b, that is, a total of six ends. Thus, a current of a vertical deflection cycle, for example, a vertical sawtooth current is caused to flow through these auxiliary coils C1, C2,..., C6 surrounding the three electron beams R, G, B, thereby obtaining three electron beams. A hexapole that generates a vertical correction magnetic field for correcting the R, G, and B vertical deflections is formed.

Next, the connection of the vertical correction magnetic field generating means of the deflection yoke shown in FIG. 1 will be described with reference to the circuit diagram of FIG.
As shown in FIG. 2, a variable resistor VR1 is connected in parallel to the vertical deflection coils C7 and C8 whose one ends are connected to a vertical deflection circuit (not shown), and the vertical deflection coils C7 and C8 are connected. The point is connected to the variable resistor VR1. Current limiting resistors R1 and R2 are connected in series to both ends of the variable resistor VR1, respectively.

One end of a resistance bridge is connected in series to the vertical deflection coil C8, and the other end of the resistance bridge is connected to a vertical deflection circuit (not shown). Further, auxiliary coils C1, C2,..., C6 forming a hexapole are connected to the middle point of the resistance bridge.

That is, in this resistor bridge, current limiting resistors R3 and R4 connected in series and a variable resistor VR2 having current limiting resistors R5 and R6 connected in series at both ends are connected in parallel. It is connected to the. Then, the auxiliary coils C1, C2,...
.., The auxiliary coil C1 at one end of C6 is connected to resistors R3 and R4.
The auxiliary coil C6 at the other end is connected to the variable resistor VR2. For this reason, the auxiliary coil C
, C6 are connected to each other, so that the magnitude and direction of the current flowing through the auxiliary coils C1, C2,..., C6 can be adjusted.

Next, the generation of the vertical correction magnetic field by the hexapole formed by the auxiliary coils C1, C2,..., C6 of the deflection yoke shown in FIG. 1 will be described with reference to FIG. As shown in FIG. 3A, a pair of bar-shaped magnetic bodies 10a and 10b and a pair of U-shaped magnetic bodies 12a and 12 are provided.
When a vertical sawtooth current is supplied as a current of a vertical deflection cycle to the auxiliary coils C1, C2,..., C6 wound in series and connected to a total of six ends of the auxiliary coils C3, C
The triple poles formed by C4 and C5 become N poles, respectively, and the triple poles formed by the auxiliary coils C1, C2 and C6.
Each heavy pole is an S pole. That is, a triple pole near one side beam R of the three electron beams R, G, and B becomes an N pole, and a triple pole near the other side beam B.
Each heavy pole becomes an S pole.

Now, a pair of bar-shaped magnetic bodies 10a and 10b
Auxiliary coil C wound in series at each end of
Paying attention to the double pole formed by C1 and C4, this double pole generates a vertical correction magnetic field schematically represented by a long broken arrow in FIG. The vertical correction magnetic field is the same as that shown in FIG.

The vertical correction magnetic field acts to correct the vertical deflection of the three electron beams R, G, and B. At this time, of the three electron beams R, G, and B, It acts relatively strongly on the side beams R and B and acts relatively weakly on the center beam G. The magnitude of the effect of the vertical correction magnetic field on the three electron beams R, G, and B is indicated by the length of the arrow added to the vicinity of the lower part of the three electron beams R, G, and B in FIG. The length is schematically represented by the length.

Further, a pair of U-shaped magnetic bodies 12a and 12
Focusing on the quadrupole formed by the auxiliary coils C2, C3, C5, and C6 that are wound in series and connected to the four ends of the b, one long point in FIG. A vertical correction magnetic field is generated as schematically shown by a chain line arrow. The vertical correction magnetic field is the same as that shown in FIG.

The vertical correction magnetic field also acts to correct the vertical deflection of the three electron beams R, G, and B. At this time, of the three electron beams R, G, and B, It acts relatively weakly on the side beams R and B and acts relatively strongly on the center beam G. The magnitude of the effect of the vertical correction magnetic field on the three electron beams R, G, and B is determined by the length of the arrow added near the upper part of the three electron beams R, G, and B in FIG. The length is schematically represented by the length.

The pair of rod-shaped magnetic members 10
a and 10b are connected in series to four ends of a pair of U-shaped magnetic bodies 12a and 12b formed by a pair of U-shaped magnetic bodies 12a and 12b formed by auxiliary coils C1 and C4 wound in series and connected to respective ends. Considering the combination with the quadrupoles formed by the auxiliary coils C2, C3, C5, and C6 that are wound around, a total of six quadrupoles schematically show long solid arrows in FIG. 3B. As shown, a substantially uniform vertical correction magnetic field is generated. The substantially uniform vertical correction magnetic field acts on the three electron beams R, G, and B substantially uniformly, and applies a substantially uniform correction to their vertical deflection. Note that the uniformity of the action of the vertical correction magnetic field on the three electron beams R, G, and B is shown in FIG.
This is schematically represented by the fact that the lengths of the arrows added near the upper portions of G and B are uniform.

As described above, according to the present embodiment, a pair of rod-shaped magnetic bodies 10a, which are disposed to face each other in the horizontal direction corresponding to the arrangement direction of the three electron beams R, G, B,
10b and a pair of U-shaped magnetic bodies 12a and 12b, which are vertically opposed to each other in a direction perpendicular to the arrangement direction of the three electron beams R, G and B, are connected in series to a total of six ends. By passing a vertical sawtooth current through the wound auxiliary coils C1, C2,..., C6, the auxiliary coils C1, C4 at the respective ends of the pair of rod-shaped magnetic bodies 10a, 10b are formed. A pair of U-shaped magnetic bodies 12a, 1
Auxiliary coils C2, C3, C5, C6 at four ends of 2b
Are combined with each other to form a hexapole as a whole, and one of the side beams R
Are the N poles, and the triple poles near the other side beam B are the S poles.
Complements the strength of the vertical correction magnetic field generated between the side beam R, B of the three electron beams R, G, B and the center beam G in the case of only the quadrupole or only the quadrupole. Thus, a substantially uniform vertical correction magnetic field that acts on the three electron beams R, G, and B with substantially uniform intensity can be obtained.

Therefore, since this substantially uniform vertical correction magnetic field acts on the three electron beams R, G, and B with uniform intensity,
Even if the three electron beams R, G, and B are deflected up and down, only one of the side beams R, B and the center beam G does not shift inward or outward. . In this way, it is possible to prevent the occurrence of convergence deviation, to perform uniform correction of upper and lower pin distortions for the three electron beams R, G, and B, and to sufficiently improve image quality performance.

In the above embodiment, the pair of rod-shaped magnetic members 10a and 10b and the pair of U-shaped magnetic members 12a and 12b are wound in series connection with a total of six ends. The case where the number of turns of the auxiliary coils C1, C2,..., C6 is the same is illustrated.
The number of turns of 2,..., C6 can be arbitrarily changed, and more specifically, it is desirable to adjust appropriately. That is,
Since the number of turns of the auxiliary coils C1, C2,..., C6 affects the distribution of the vertical correction magnetic field to be formed and the strength thereof, it is particularly wound around each end of the pair of bar-shaped magnetic bodies 10a, 10b. By adjusting the number of turns of the auxiliary coils C1 and C4 and the number of turns of the auxiliary coils C2, C3, C5 and C6 wound around each end of the pair of U-shaped magnetic bodies 12a and 12b, three , It is possible to obtain a nearly perfectly uniform vertical correction magnetic field that acts with uniform intensity by the electron beams R, G, and B.

In the above embodiment, the auxiliary coil wound in series with each end of a pair of bar-shaped magnetic members 10a and 10b and a pair of U-shaped magnetic members 12a and 12b. Although the case where a hexapole is formed by C1, C2,..., C6 has been described, a substantially uniform vertical correction magnetic field acting on the three electron beams R, G, and B with uniform intensity is described. From the viewpoint of obtaining, it is not necessary to limit to the hexapole. A pair of rod-shaped magnetic members may be connected in series to each end to form a double pole with an auxiliary coil wound therearound, or may be connected in series to four ends of a pair of U-shaped magnetic members in series. Forming a quadrupole with the wound auxiliary coil has been conventionally performed, and by combining these, the three electron beams R, G, and B are acted with uniform intensity. Since a substantially uniform vertical correction magnetic field can be easily realized, a hexapole is used as in the present embodiment. Therefore, if the apparatus is not complicated, the number of poles can be further increased, for example, by using an octupole or a 10-pole, thereby realizing a vertical correction magnetic field closer to complete uniformity.

[0043]

As described above, according to the deflection yoke of the present invention, the following effects can be obtained. That is, according to the deflection yoke of the first aspect,
The auxiliary coil forms a hexapole surrounding the three electron beams. Of these hexapoles, the triple pole near one side beam of the three electron beams forms an N pole, and the other side beam forms the N pole. Since the close triple pole forms the south pole, 3
Since it is possible to generate a vertical correction magnetic field that acts substantially uniformly on three electron beams, it is necessary to perform uniform correction of upper and lower pin distortions for three electron beams and sufficiently improve image quality performance. Can be.

According to the deflection yoke according to the second aspect, the four ends of a pair of U-shaped magnetic bodies arranged in opposition in a direction orthogonal to the arrangement direction of the three electron beams are connected in series. 4 formed by connected and wound auxiliary coils
A double pole formed by a double pole and an auxiliary coil wound around two ends of a pair of rod-shaped magnetic bodies disposed to face each other in a direction coinciding with the arrangement direction of the three electron beams. Are combined with each other to form a hexapole,
Since it is possible to generate a vertical correction magnetic field that acts substantially uniformly on three electron beams, it is necessary to perform uniform correction of upper and lower pin distortions for three electron beams and sufficiently improve image quality performance. Can be.

According to the deflection yoke according to the third aspect, in the deflection yoke according to the second aspect, one side beam of three electron beams among the six poles surrounding the three electron beams. The triple pole near to the N-pole forms an N-pole, and the triple pole near the other side beam forms an S-pole. Since the effect of generating the correction magnetic field can be easily realized, the upper and lower pin distortions can be uniformly corrected for the three electron beams, and the image quality performance can be sufficiently improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of a vertical correction magnetic field generation means of a deflection yoke according to an embodiment of the present invention as viewed from an electron gun side.

FIG. 2 is a circuit diagram showing connection of a vertical correction magnetic field generation means of the deflection yoke shown in FIG.

FIG. 3 is an operation explanatory diagram for explaining a state of generation of a vertical correction magnetic field by a vertical correction magnetic field generation means of the deflection yoke shown in FIG. 1;

FIG. 4 is a schematic view of a CRT viewed from the side, for explaining a method of correcting vertical pin distortion using an auxiliary coil.

FIG. 5 is a schematic diagram of a vertical correction magnetic field generating means of the deflection yoke as viewed from the electron gun side, and shows how a vertical correction magnetic field is generated when an auxiliary coil forming a quadrupole is used.

FIG. 6 is a schematic view of a vertical correction magnetic field generating means of the deflection yoke as viewed from the electron gun side, and shows how a vertical correction magnetic field is generated when an auxiliary coil forming a double pole is used.

[Explanation of symbols]

10a, 10b... A pair of rod-shaped magnetic bodies, 12a, 12
b: a pair of U-shaped magnetic materials, R: red electron beam (side beam), G: green electron beam (center beam), B: blue electron beam (side beam), C
1, C2, C3, C4, C5, C6... Auxiliary coils forming a hexapole, C7, C8... Vertical deflection coils, VR
1, VR2 ... variable resistor, R1, R2, R3, R4, R
5, R6 ... current limiting resistor, 20 ... core, 22 ...
... vertical deflection coil, 24 ... fluorescent screen, 26 ... auxiliary coils as vertical correction magnetic field generating means, 30a, 30b ...
A pair of U-shaped magnetic materials, C11, C12, C13, C1
4 ... Auxiliary coils forming quadrupoles, 32a, 32b ...
... A pair of rod-shaped magnetic materials, C21, C22 ... Auxiliary coils forming a double pole.

Claims (3)

[Claims] 1. A deflection yoke for deflecting three electron beams emitted from an in-line array of electron guns, wherein a hexapole is formed on a neck side of the deflection yoke so as to surround the three electron beams. The auxiliary coil is arranged,
A deflection yoke in which a triple pole near one side beam of the three electron beams forms an N pole and a triple pole near the other side beam forms an S pole. . 2. A deflection yoke for deflecting three electron beams emitted from an in-line array of electron guns, comprising: a pair of deflection yokes arranged to face each other in a direction orthogonal to an array direction of the three electron beams. And a pair of rod-shaped magnetic bodies disposed opposite to each other in a direction coinciding with the arrangement direction of the three electron beams are provided on the neck side of the deflection yoke. Auxiliary coils are connected in series around four ends of the pair of U-shaped magnetic bodies and two ends of the pair of rod-shaped magnetic bodies, and are wound around the pair of U-shaped magnetic bodies. And a hexapole surrounding the three electron beams is formed by the auxiliary coil wound in series with a total of six ends of the pair of rod-shaped magnetic bodies. Deflection yoke. 3. The deflection yoke according to claim 2, wherein the three poles of the six poles surrounding the three electron beams are included.
The triple pole near one side beam of this electron beam is N
A deflection yoke, wherein a pole, and a triple pole near the other side beam, forms an S pole.