JPH07226173A - Color picture tube device - Google Patents

Abstract

(57) [Summary] [Configuration] A plurality of beams 26B arranged in a row passing through the same plane,
An electron gun 25 for emitting 26G and 26R, and a deflection device 28 having a first deflection coil 30H for deflecting the plurality of beams in the arrangement direction and a second deflection coil 30V for deflecting in the direction orthogonal to the arrangement direction are provided. In a color picture tube device,
On the electron gun side of the deflecting device, an even number of linear portions 37 composed of a bundle of conductors extending along the tube axis are arranged on the circumference around the tube axis, and each linear portion of the deflecting device Subcoil in which current synchronized with deflection flows in the opposite direction to the adjacent linear portion
33 was placed. [Effect] Higher-order deflection aberration can be corrected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color picture tube apparatus, and more particularly to a color picture tube apparatus having a sub-coil for correcting a beam spot distortion and a convergence deviation due to a deflection aberration.

[0002]

2. Description of the Related Art Generally, a color picture tube device is provided with a phosphor screen composed of a phosphor layer of three colors that emits blue, green and red, facing a shadow mask, and a three electron beam emitted from an electron gun is emitted from the screen. Horizontal direction (long axis direction) due to the magnetic fields generated by the horizontal and vertical deflection coils of the deflection device
And by deflecting in the vertical direction (short axis direction) and scanning the phosphor screen through the shadow mask,
It has a structure for displaying a color image.

In such a color picture tube device, in order to improve the image quality on the phosphor screen, it is necessary to correctly concentrate the three electron beams over the entire screen. Therefore, in particular, the electron gun is an in-line type electron gun that emits three electron beams arranged in a line consisting of a center beam and a pair of side beams that pass on the same plane, and a deflecting device is generated by utilizing the characteristics of this electron gun. 2. Description of the Related Art A self-convergence in-line type color picture tube device in which three electron beams are substantially concentrated over the entire screen by making a magnetic field into a specific non-uniform magnetic field is widely used. The deflection magnetic field of this self-convergence in-line type color picture tube device is mainly composed of a pincushion type horizontal deflection magnetic field and a barrel type vertical deflection magnetic field for three electron beams arranged in a row passing on the same horizontal plane. Has been done.

By constructing the magnetic field generated by the deflecting device in this way, a pair of side beams among the three electron beams arranged in a row passing on the same horizontal plane can be concentrated at one point over the entire screen. As shown in FIG. 27 (a), the astigmatism can be substantially eliminated, and the scanning regions 1B and 1R of the pair of side beams can be made to substantially coincide with each other. However, the center beam and the pair of side beams cannot be concentrated at the same point, and the center beam scanning area 1G
And a pair of side beam scanning areas 1B and 1R, coma aberration occurs.

Various methods have been conventionally considered to correct this coma aberration, and can be roughly classified into the following two methods.

The first method, which is generally called a coma-free deflector, corrects coma by optimizing the magnetic field distribution of the deflector. In an example of the magnetic field distribution, as shown in FIG. 28 (a), the rear part (electron gun side) of the distribution of the pincushion type horizontal deflection magnetic field 2H is distorted into a barrel shape, while as shown in FIG. 28 (b). 27B, the rear part of the distribution of the barrel-shaped vertical deflection magnetic field 2V is distorted into a pincushion shape, whereby the center beam and the pair of side beams are concentrated at one point, and FIG.
As shown in, the scanning area 1B, 1G, 1 of each electron beam
Matches R. Magnetic field of such distribution 2H, 2V
29 (a), a pair of sub-coils 5 having a plurality of poles obtained by winding a coil 4 around an E-shaped magnetic body 3 is provided on the rear side of the deflection device with a vertical axis (y (B) which is arranged symmetrically with respect to
As shown in FIG. 3, there is a magnetic body 6 having a U-shape, which is symmetrically arranged on the rear side of the deflecting device with respect to the vertical axis to shape the rear leakage magnetic field of the deflecting device.

The second method is to dispose a magnetic substance on the electrode on the phosphor screen side of the electron gun to shape the rear leakage magnetic field of the deflecting device and to intensify the magnetic field for three electron beams arranged in a row passing on the same horizontal plane. Is relatively changed. As an example of this, as shown in FIG. 29C, a pair of side beams among the three electron beam passage holes 9B, 9G, 9R at the bottom of the shield cup 8 attached to the phosphor screen side of the electron gun. A magnetic body 10 is arranged so as to surround the through holes 9B and 9R, and the magnetic field strength for the center beam is relatively stronger than the magnetic field strength for the pair of side beams with respect to both horizontal and vertical deflection magnetic fields. is there. According to this method, the deflection amount of the center beam can be increased with respect to the pair of side beams, and as shown in FIG. 27B, the scanning regions 1B, 1G, and 1R of the electron beams are made to coincide with each other. , Coma can be almost eliminated.

However, even with the above construction, astigmatism and coma cannot be completely eliminated, and as shown in FIG. 30, the convergence due to the above-mentioned aberrations is caused especially near the middle and peripheral portions of the screen. The higher-order gills 11 in which the direction of the gills is reversed are left. The high-order error 11 becomes more prominent when the panel is flattened or the deflection angle is increased as in the recent color picture tube. This high-order error 11 is difficult to remove by a conventional deflecting device or particularly by the structure in which the magnetic body 10 is arranged at the bottom of the shield cup 8 shown in FIG. The first method also has problems that the shape of the magnetic body is more complicated and the number of magnetic poles of the sub-coil needs to be increased, which makes it difficult to design and manufacture the magnetic body.

[0009]

As described above, the electron gun is an electron gun that emits three electron beams arranged in a row and composed of a center beam and a pair of side beams that pass on the same plane, and the horizontal direction generated by the deflecting device. In the self-convergence in-line type color picture tube device in which the vertical deflection magnetic field is an inhomogeneous magnetic field, the center beam and the pair of side beams cannot be concentrated at the same point on the screen, and coma aberration occurs.

In order to correct this coma, a conventional method of optimizing and correcting the magnetic field distribution of the deflecting device, and a magnet for shaping a sub-coil having a plurality of poles or a rear leakage magnetic field of the deflecting device on the rear side of the deflecting device. There are various methods such as arranging the body or arranging a magnetic body for shaping the rear leakage magnetic field of the deflecting device on the electrode on the phosphor screen side of the electron gun. However, even in this case, it is not possible to completely eliminate astigmatism and coma, and in particular, a higher-order error in which the direction of the convergence error due to the deflection aberration is reversed is left in the vicinity of the middle part and the peripheral part of the screen. The high-order error becomes more prominent when the panel is flattened or the deflection angle is increased as in recent color picture tubes. This high-order convergence error is difficult to remove by a conventional deflecting device or a structure in which a magnetic material is arranged at the bottom of a shield cup attached to the phosphor screen side of an electron gun, in particular. Further, in the case where a sub coil having a plurality of poles or a magnetic body for shaping a rear leakage magnetic field is arranged on the rear side of the deflecting device, it is necessary to make the shape of the magnetic body more complicated or increase the number of magnetic poles of the sub coil. There are problems such as difficulty in designing and manufacturing.

The present invention has been made in view of the above problems, and provides a color picture tube device capable of relatively easily correcting higher-order convergence error occurring in a self-convergence in-line type color picture tube device. The purpose is to configure.

[0012]

A panel having a phosphor screen formed on its inner surface and a funnel-shaped funnel having a cylindrical neck are arranged in the neck of the envelope.
An electron gun that emits a plurality of beams arranged in a row passing through the same plane, and a first deflection coil and a plurality of beams mounted on the boundary between the large-diameter portion and the neck of the funnel and deflecting the plurality of beams in the arrangement direction. In a color picture tube device including a deflecting device having a second deflecting coil that deflects in a direction orthogonal to the direction, an even number of linear wire bundles of conductor wire bundles extending along the tube axis are provided on the electron gun side of the deflecting device. The parts are arranged on the peripheral surface around the tube axis, and the sub-coil in which the current synchronized with the deflection current flowing through the deflecting device flows in the opposite direction to the adjacent linear part is arranged in each of the linear parts.

In addition, a current synchronized with the deflection current flowing through the first or second deflection coil flows through the sub coil.

Further, the linear portion of the sub coil is
It was set to 10 or 10.

[0015]

With the above construction, for example, the color picture tube emits three electron beams arranged in a row passing through the same horizontal plane, and the sub-coil has six linear portions, and the second linear portion is provided in the second linear portion. Assuming that a current synchronized with the deflection current flowing through the deflection coil flows, x = 0 in the orthogonal coordinate system in which the arrangement direction of the three electron beams is the x axis and the direction orthogonal to the arrangement direction of the three electron beams is the y axis. X at
Directional magnetic field strength Bx is

[Outer 1] (See Figure 6). The shape of the normal deflection magnetic field is determined by the twice differential value, and when the magnetic field generated by the second deflection coil deflects the electron beam downward in the screen, the pincushion type magnetic field is generated when the second differential value is positive. To form. Further, the relationship between the x-direction magnetic field strength Bx and x is that the magnetic field for the center beam is stronger than the magnetic fields for the pair of side beams (see FIG. 7). Therefore, the center electron beam is deflected more than the pair of side beams by the pincushion type magnetic field. As a result, coma can be eliminated and the center beam can be concentrated at the same point as the pair of side beams.

If there are 10 linear parts of the sub-coil, the x-direction magnetic field strength Bx at x = 0 increases almost quadratically with respect to the change of y (see FIG. 6). Also x
The relationship between the directional magnetic field strengths Bx and x is such that the magnetic field for the center beam is slightly smaller than the magnetic fields for the pair of side beams in the region where the three electron beams are not off axis. However, like an electron beam that goes to the peripheral part of the screen,
With respect to the electron beam passing through the area decentered by mm, the magnetic field with respect to the center beam becomes larger than the magnetic fields with respect to the pair of side beams, and as the axis is decentered, the difference becomes larger (see FIG. 18). Such a magnetic field has almost no effect of correcting coma and astigmatism on the electron beam heading to the central portion and the middle portion of the screen, but coma aberration to the electron beam heading to the peripheral portion of the screen. It is possible to obtain the effect of correcting the astigmatism and the astigmatism.

That is, if the number of linear portions of the sub-coil is increased, the pincushion type magnetic field formed by the sub-coil having six linear portions cannot eliminate coma aberration over the entire screen, for example, in the peripheral portion of the screen. Even if the coma aberration is corrected, a high-order convergence error that may be overcorrected in the middle part of the screen may remain, but such a high-order error can also form a more complicated magnetic field. , It becomes possible to correct the high-order error by utilizing the difference in the passing area of the electron beam.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described based on embodiments with reference to the drawings.

FIG. 1 shows a self-convergence in-line type color picture tube device which is an embodiment of the present invention.
This color picture tube device has an envelope composed of a panel 20 and a funnel-shaped funnel 21 integrally joined to the panel 20, and a stripe-shaped envelope that emits blue, green, and red on the inner surface of the panel 20. The phosphor screen 22 including the three-color phosphor layer is formed.
The shadow mask 23 is disposed inside the shadow mask 23 so as to face the. On the other hand, the electron gun 25 is arranged in the cylindrical neck 24 of the funnel 21. The electron gun 25 emits three electron beams 26B, 26G, 26R arranged in a row, which is composed of a center beam 26G passing through the same horizontal plane and a pair of side beams 26B, 26R. A deflection device 28 is mounted outside the boundary between the large diameter portion 27 of the funnel 21 and the neck 24.

The deflecting device 28 is wound in a saddle type, and is vertically (vertical direction, y direction) inside the separator 29.
A pair of symmetrically arranged horizontal deflection coils 30H (first deflection coil) and a toroidal winding around the core 31,
Vertical deflection coil 30 arranged outside the separator 29
V (second deflection coil). The horizontal deflection coil 30H generates a mainly pincushion-type horizontal deflection magnetic field that deflects the three electron beams 26B, 26G, and 26R in the horizontal direction, which is the arrangement direction of the three electron beams 26B, 26G, and 26R.
0 V generates a mainly barrel-shaped vertical deflection magnetic field which deflects in the vertical direction orthogonal to the arrangement direction of the three electron beams 26B, 26G and 26R. As a result, the three electron beams 26B, 26G, 2 arranged in a line passing through the same horizontal plane are arranged.
6R is concentrated on the phosphor screen 22.

Here, the horizontal and vertical deflection coils 30H, 3
The mainly pincushion type horizontal deflection magnetic field and the barrel type vertical deflection magnetic field generated by 0 V mean that they collectively form a pincushion type deflection magnetic field and a barrel type deflection magnetic field. The deflection device 2
8 is a semi-toroidal type in which the horizontal deflection coil 30H is a saddle type and the vertical deflection coil 30V is a toroidal type. The device may be a toroidal-toroidal deflection device in which both horizontal and vertical deflection coils are toroidal.

Further, in this color picture tube device, a sub-coil 33 is arranged outside the neck 24 at the rear portion (on the side of the electron gun 25) of the deflection device 28, that is, at the rear portion of the horizontal deflection coil 30H of the semi-toroidal deflection device 28. Has been done. As shown in FIG. 2A, this sub-coil 33 has an inner diameter substantially equal to the outer diameter of the neck, flanges 34 are formed at both ends, and a plurality of grooves 35 are formed in the flange 34. Alternatively, a cylindrical drum 36 made of a non-magnetic metal and an even number of linear portions 37 of a conductor wire bundle consisting of a plurality of conductor wires wound in a groove 35 of a flange portion 34 of the drum 36, as shown in FIG. The linear portion 37 of the conductor wire bundle, which extends along the outer side surface of the wire 36 and is wound in the adjacent groove, and the coil 38 configured so that the current flows in the opposite direction. In the illustrated example, the flange portion 3 of the drum 36 is provided in order to adjust the distance between the linear portions 37 of the conductor wire bundle.
4, a plurality of grooves 35 are formed at equal intervals so that the angle formed with the center thereof is 15 °, and six linear portions 37 are formed in the grooves 35 as shown in FIG. There is shown a coil 38 in which a plurality of conducting wires are wound around and the angle θ with the center of the linear portion 37 is 60 °. This coil 3
Both ends of 8 are connected in series to the vertical deflection coil of the above deflection device, and when the vertical deflection coil generates a magnetic field in the positive horizontal direction so as to deflect the three electron beams downward in the vertical direction, the magnetic field of the vertical deflection coil The magnetic field 39 shown in FIG. 4 is generated in synchronization with the generation.

The sub-coil 33 thus constructed is
It is arranged on the neck 24 at the rear of the deflector 28 with the x and y axes aligned. In this case, the six straight line portions 37 are arranged on the circumference centered on the tube axis z of the color picture tube and extend along the tube axis z.

By the way, with the above arrangement, the deflection device 28
When the magnetic field 39 generated by the sub-coil 33 is superimposed on the rear leakage magnetic field generated by the vertical deflection coil 30V, a pincushion type magnetic field 40a shown in FIG. 5 is formed.
That is, the distribution of the magnetic field strength Bx in the x direction (horizontal direction) of the magnetic field generated by the sub-coil 33 is x = 0 in FIG. 6 in an orthogonal coordinate system in which the x axis and the axis orthogonal to this x axis are y axes.
As shown by the curve 41a, the relation between the x-direction magnetic field strength Bx and y in the above equation increases quadratically with respect to y.

[0025]

[Outside 2] When combined with the magnetic field generated by the direct deflection coil, the pincushion type magnetic field 38 shown in FIG. 6 is formed. The relationship between the x-direction magnetic field strength Bx and x is as shown in FIG.
The curves 42a, 2.5a, 5.0 and 7.5, respectively,
As shown in 42b, 42c, and 42d, Bx becomes smaller and the magnetic field for the center beam becomes stronger than the magnetic fields for the pair of side beams as the axis deviates in the x direction in any of the positive and negative directions. Therefore, the three-electron beam passing through such a magnetic field (pincushion type magnetic field) is deflected more by the center beam than by the pair of side beams. Therefore, after that, even if the deflection of the center beam is weakened more than the deflection of the pair of side beams by the mainly barrel-shaped vertical deflection magnetic field generated by the vertical deflection coil,
The center beam and the pair of side beams can be concentrated at the same point on the phosphor screen, and coma can be eliminated.

However, even if the number of linear portions 37 of the wire bundle of the sub-coil 33 is set to 6 and the distance between the linear portions 37, that is, the angle .theta. Since different aberrations are generated, it is not always possible to properly correct coma in all cases. In order to effectively correct different coma aberrations due to the characteristics of the deflecting device 28, the sub-coil 3
It is necessary to properly adjust the distribution of the magnetic field generated by No. 3.
In the sub-coil 33 having the six straight line portions 37, the adjustment of the magnetic field distribution is performed by adjusting the interval, length,
This can be done by changing the position, the number of windings of the conducting wire, and the like. The change of the interval is performed by changing the drum 36 shown in FIG.
This can be easily performed by appropriately selecting the plurality of grooves 35 formed in the above and winding the conductive wire. Further, the number of turns of the conductive wire can be easily changed, and the required sub-coil 33 required for correction of coma aberration can be designed and manufactured extremely easily and easily.

As an example thereof, FIG. 8 shows a magnetic field 40b when a magnetic field generated by a sub-coil having an angle θ of 30 ° with the center of the linear portion of the conductor wire bundle is superposed on the rear leakage magnetic field of the vertical deflection coil. 9 shows the relationship between the x-direction magnetic field strength Bx and y at x = 0 by a curve 41b, and FIG. 10 shows the relationship between the x-direction magnetic field strength Bx and x at y = 0, 2.5, 5.0,
In the case of 7.5, the curves 42e, 42f, 42g,
42h. As another example, FIG. 11 shows a magnetic field 40c when a magnetic field generated by a sub-coil having an angle θ of 75 ° with the center of the linear portion of the conductor wire bundle is superimposed on the rear leakage magnetic field of the vertical deflection coil, and FIG. In this case x = 0
The relationship between the x-direction magnetic field strength Bx and y at
FIG. 13 shows the relationship between the x-direction magnetic field strength Bx and x as y = 0,
The curves 42i, 2.5i, 5.0, and 7.5, respectively,
42j, 42k, and 42l.

As can be seen from these drawings, when the angle θ formed by the straight line portion of the wire bundle with the center is 30 ° (see FIG. 8), it is close to the uniform magnetic field in the vicinity of the x axis, but deviates in the y direction. Therefore, the pincushion type magnetic field suddenly becomes strong. On the other hand, the angle θ formed by the straight part of the wire bundle with the center
Is 75 ° (see FIG. 11), the pincushion-shaped magnetic field becomes weaker as the axis deviates in the y direction compared to the vicinity of the x axis. The relationship between Bx and y at x = 0 forms a complicated magnetic field that cannot be expressed by a quadratic function, as shown in FIGS. 9 and 12. When this relation between Bx and y is approximated by a polynomial with a power series shown in Equation 1,

[Equation 1] The coefficient of each term is the value shown in Table 1.

[Table 1] That is, the ratio of the coefficient a ₂ of y ² is large when θ = 60 °, and the ratio of the coefficient a ₄ of y ⁴ is large when θ = 30 °. When θ = 75 °, y
⁴ coefficients a ₄ becomes negative, than at theta = 60 °, pincushion magnetic field is weakened.

As described above, only by adjusting the interval of the straight line portion of the wire bundle of the sub-coil 33, a complicated magnetic field including higher-order terms is formed as compared with the magnetic field strength distribution conventionally expressed by a quadratic function. Therefore, according to the characteristics of the deflecting device 28, the distance between the linear portions 37 of the sub-coil 33,
By changing the number of turns of the conducting wire, it becomes possible to effectively correct coma.

In order to make the effect of the sub-coil 33 effective, the three electron beam 26B directed to the peripheral portion of the screen is used.
, 26G, 26R are preferably arranged in a region distant from the tube axis by about 1 to 10 mm. By arranging the sub-coil 33 in such a region, the magnetic field for the three electron beams 26B, 26G, 26R toward the center of the screen and the three electron beams 26B, 26G, 26 toward the peripheral part of the screen are obtained.
It is possible to make a large difference from the magnetic field with respect to R 2, to further enhance the effect of forming a complicated magnetic field, and to effectively correct higher-order deflection aberration such as inversion error that occurs on the screen. However, if the sub-coil 33 is moved in the arrangement position toward the phosphor screen 22 and is arranged in a region where the three electron beams 26B, 26G, and 26R are farther from the tube axis, astigmatism, image distortion, and other Will affect the characteristics of. Therefore, it is necessary to appropriately set the arrangement position.

The sub-coil 33 having six linear portions 37 of the conductor wire bundle is adjusted to the characteristics of the deflecting device 28, and the interval, length, position, winding number of the conductor wires, etc. of the linear portions 37 are adjusted to obtain a color picture tube. As a result of arranging in the device, as shown in FIG. 29 (c), a magnetic body is arranged at the bottom of the shield cup attached to the phosphor screen side of the conventional electron gun so as to surround the pair of side beam passage holes. It was possible to almost completely eliminate the overcorrection in the middle part of the screen that occurred when the coma aberration was corrected. Moreover, in the sub-coil 33 of this example,
Not only can coma aberration be corrected, but astigmatism in the middle part of the screen, which remains when the astigmatism at the peripheral part of the screen, which has been caused by the same cause as before, is corrected to zero, can be almost completely eliminated.

Next, another embodiment will be described.

FIG. 14 shows 10 subcoils in which the linear portion of the wire bundle is 10 pieces. The sub-coil 33 has an inner diameter substantially equal to the outer diameter of the neck of the color picture tube, and has flange portions 3 at both ends.
4, a cylindrical drum 36 made of plastic or non-magnetic metal having a plurality of grooves 35 formed in the flange portion 34, and a plurality of conductive wires wound in the groove 35 of the flange portion 34. Ten straight line portions 37 of the wire bundle extend along the outer surface of the drum 33, and are formed by the straight line portion 37 of the wire bundle wound in the adjacent groove and the coil 38 configured to flow the opposite current. Become. As shown in FIG. 15, the ten straight line portions 37 extend at equal intervals so that the angle θ ₁ with the center is 360 ° / 10 = 36 °, and a straight line portion 37 through which a current flows in the same direction. The angle θ ₂ with the center is 36 ° × 2 = 72 °. Both ends of this coil 38 are connected in series to the vertical deflection coil of the deflection device, and when the vertical deflection coil generates a magnetic field in the positive horizontal direction so as to deflect the three electron beams downward in the vertical direction, the vertical deflection coil is formed. Figure 1
A magnetic field 39 shown in 6 is generated.

Since the color picture tube device in which the sub-coil 33 is arranged and the arrangement thereof are the same as those in the color picture tube device shown in FIG. 1, the description thereof is omitted here.

As described above, when the linear portion of the wire bundle constitutes 10 sub-coils 33 and is arranged in the rear part of the deflecting device and connected in series to the vertical deflection coil, the rear leakage magnetic field generated by the vertical deflection coil is A magnetic field 39 generated by 33 is superposed on this sub-coil, and as shown in FIG. 17, a magnetic field 44a is formed which is uniform in the vicinity of the x-axis but rapidly becomes a pincushion shape as the axis is separated in the y-direction. . Further, as shown by the curve 44a in FIG. 6 for the relationship between the x-direction magnetic field strength Bx and y at x = 0, the x-direction magnetic field strength Bx increases with a quadratic function with respect to y. Also, the x direction magnetic field strength Bx
The relation between x and x is y = 0, 2.5, 5.0,
In the case of 7.5, the curves 46a, 46b, 46c,
As indicated by 46d, the magnetic field for the center beam is slightly smaller than the magnetic fields for the pair of side beams in the region where the three electron beams are not off axis so much. However, from the tube axis through which the three electron beams heading to the screen periphery pass,
In an area decentered by about mm, the magnetic field for the center beam becomes larger than the magnetic fields for the pair of side beams,
The greater the distance from the axis, the greater the difference.

Such a magnetic field is, as shown in FIG.
The three electron beams 26B, 26G, and 26R passing through the regions C and M toward the center and the middle of the screen have almost no effect of correcting coma and astigmatism, as indicated by arrows 48 and 49. As shown by an arrow 50, the electron beam passing through the region P toward the peripheral portion of the screen has a correction effect of coma and astigmatism. That is, if the number of linear portions 37 of the wire bundle is increased like the sub-coil 33 of this example having ten linear portions 37, a more complicated magnetic field can be formed, and each electron beam 26B, 26G, 2 can be formed.
It becomes possible to correct higher-order deflection aberrations by utilizing the difference in 6R pass region.

Also, regarding the sub-coil 33 having the ten linear portions 37, the linear portion 37 is centered in accordance with the characteristics of the deflecting device as in the sub-coil having the six linear portions shown in the above embodiment. Angle θ ₁ , θ ₂ , length,
By adjusting the position, the number of turns of the conducting wire, and the like, it becomes possible to correct the deflection aberration that cannot be corrected by the sub-coils 33 having the straight portions 37 at equal intervals.

As an example, in FIG. 20, the magnetic field generated by the sub-coil having the angles θ ₁ = 18 ° and θ ₂ = 81 ° formed by the straight line portion of the wire bundle with the center is superimposed on the rear leakage magnetic field generated by the vertical deflection coil. The magnetic field 44b in the case of
The curve 4 shows the relationship between the x-direction magnetic field strength Bx and y when x = 0.
5b, the relationship between the x-direction magnetic field strength Bx and x is shown in FIG.
The cases of y = 0, 2.5, 5.0 and 7.5 are shown by curves 46e, 46f, 46g and 46h, respectively. As another example, in FIG. 22, the angle θ ₁ formed by the straight line portion of the wire bundle with the center is shown.
= 45 ° and θ ₂ = 60 °, the magnetic field 44c is shown in FIG. 12, the relationship between the x-direction magnetic field strength Bx and y at x = 0 is a curve 45b, and the x-direction magnetic field strength Bx is shown in FIG. The relationship with x is shown by curves 46i, 46j, 46k and 46l for y = 0, 2.5, 5.0 and 7.5, respectively.

In this way, the straight part 3 of the sub-coil wire bundle is
By changing the angles θ ₁ and θ ₂ formed by 7 with the center to increase the number of linear portions 37, a more complicated magnetic field can be formed, and as shown in FIG. Electron beam 26B, 2 directed to the center and peripheral parts of the screen
For 6G and 26R, there is almost no effect of correcting coma and astigmatism as indicated by arrows 48 and 50, and the electron beams 26B and 2B passing through the region M toward the middle portion of the screen.
It becomes possible to correct coma and astigmatism as indicated by arrow 49 only for 6G and 26R.

In each of the above embodiments, the case where the sub-coil is connected to the vertical deflection coil of the deflection device to deflect the three electron beams in the vertical direction has been described.
Also for the diagonal deflection, the sub-coil can be connected to the horizontal deflection coil to correct higher-order deflection aberrations.

In each of the above embodiments, one drum has one drum.
The case where the sub-coil wound with the set of coils is connected to the vertical deflection coil of the deflection device and used is explained.
As shown in FIG. 25, one drum 33 is wound with two sets of coils 38a and 38b consisting of a first coil 38a indicated by a1 to a6 and a second coil 38b indicated by b1 to b10. Straight part 3 of the wire bundle of the first coil 38a
7a and the linear portion 37b of the second coil 38b adjacent to the linear portion 37a of the first coil 38a, the first coil 38a is connected to the vertical deflection coil of the deflecting device so that the reverse current flows. The other coil 38b may be connected to the horizontal deflection coil.

Further, in each of the above embodiments, the sub-coil is arranged outside the neck of the rear part of the deflecting device, but as shown in FIG. 26, the rear part of the horizontal deflecting coil 30H of the semi-toroidal type deflecting device 28 is formed to be long, This horizontal deflection coil 30
It may be located on the rear of H and close to the rear of the vertical deflection coil 30V.

[0043]

According to the present invention, an electron gun for emitting a plurality of beams arranged in a row passing through the same plane, a first deflection coil for deflecting the plurality of beams in the arrangement direction, and a first deflection coil for deflecting the plurality of beams in a direction orthogonal to the arrangement direction of the plurality of beams. In a color picture tube device including a deflecting device having two deflection coils, an even number of linear portions made up of a bundle of conductors extending along the tube axis surround the tube axis on the electron gun side of the deflecting device. A sub-coil is disposed on the surface, and each sub-coil has a sub coil through which a current synchronized with the deflection of the deflection device flows in the opposite direction to that of the adjacent sub-section. More specifically, the sub-coil is used for the first or second deflection. A current synchronized with the deflection current flowing in the coil shall flow,
Further, if the number of linear portions of the sub-coil is 6 or 10, it is possible to relatively easily design and manufacture a complicated magnetic field capable of correcting the high-order deflection aberration generated due to the inhomogeneous deflection magnetic field. In particular, by applying it to a color picture tube device in which high-order deflection aberration is prominent by flattening the panel or increasing the deflection angle, the high-order deflection aberration can be satisfactorily corrected.

[Brief description of drawings]

FIG. 1 (a) is a diagram showing a configuration of a color picture tube device which is an embodiment of the present invention, and FIG. 1 (b) is a diagram showing an arrangement of sub-coils with respect to the deflecting device.

FIG. 2 (a) is a diagram showing a structure of a drum of the sub coil, and FIG. 2 (b) is a diagram showing a structure of the sub coil.

3 (a) and 3 (b) are diagrams showing a wiring state of a coil of the sub coil.

FIG. 4 is a diagram showing a magnetic field generated by the sub coil.

FIG. 5 is a diagram showing a magnetic field when a magnetic field generated by a sub-coil is superimposed on a magnetic field generated by a vertical deflection coil of a deflection device.

FIG. 6 is a diagram showing a relationship between an x-direction magnetic field strength and y when x = 0 generated by the sub coil.

FIG. 7 is an x-direction magnetic field strength and x generated by the sub-coil.
It is a figure which shows the relationship with.

FIG. 8 shows a magnetic field generated by a vertical deflection coil of the deflection device,
It is a figure which shows the magnetic field when the magnetic field which the said sub coil and the linear part of a conductor wire bundle generate | occur | produce of the sub coil from which the angle which the center of a coil differs differs.

FIG. 9 is a diagram showing the relationship between the magnetic field intensity of the sub-coil generated by the sub-coil whose angle formed by the linear portion of the conductor wire bundle is different from that of the coil in the x-direction when x = 0 and y.

FIG. 10 shows the x-direction magnetic field intensity and x generated by the sub-coils in which the angle formed by the straight line portion of the conductor wire bundle and the center of the coil is different.
It is a figure which shows the relationship with.

FIG. 11 is a diagram showing a magnetic field when a magnetic field generated by a sub-coil generated by a vertical deflection coil of the deflecting device is superimposed on a magnetic field generated by a sub-coil having a different angle between the sub-coil and the linear portion of the conductor wire bundle with the center of the coil. is there.

FIG. 12: x at x = 0 generated by a sub-coil in which the angle formed by the straight line portion of the conductor wire bundle and the center of the coil is further different.
It is a figure which shows the relationship between direction magnetic field strength and y.

FIG. 13 is a diagram showing the relationship between x and the magnetic field strength in the x direction generated by subcoils in which the angle formed by the straight line portion of the wire bundle and the center of the coil is further different.

FIG. 14 is a diagram showing a structure of a sub-coil of another embodiment of the present invention.

15 (a) and 15 (b) are diagrams showing a wiring state of a coil of a sub-coil of the other example.

FIG. 16 is a diagram showing a magnetic field generated by a sub-coil of the other embodiment.

FIG. 17 is a diagram showing a relationship between a magnetic field generated by a vertical deflection coil of a deflecting device and a magnetic field strength of the x direction generated by a sub coil of the other embodiment at x = 0 and y.

FIG. 18 is a diagram showing a relationship between x-direction magnetic field intensity generated by a sub coil of the other embodiment and x.

FIG. 19 is a diagram for explaining the action of the magnetic field generated by the sub-coil of the other embodiment.

FIG. 20 shows a case where a magnetic field generated by a sub-coil generated by the vertical deflection coil of the deflecting device is superposed on the magnetic field generated by the sub-coil of the above-described other embodiment and the angle between the linear portion of the wire bundle and the center of the coil is further different. It is a figure which shows a magnetic field.

FIG. 21 is a diagram showing the relationship between x and the magnetic field intensity in the x direction generated by a sub coil in which the angle formed by the straight portion of the wire bundle and the sub coil of the other embodiment is further different from the center of the coil.

FIG. 22 shows a magnetic field generated by a vertical deflection coil of a deflecting device in which a magnetic field generated by another sub-coil of another embodiment and a sub-coil of another embodiment is different from the angle of the linear portion of the wire bundle with the center of the coil. It is a figure which shows the magnetic field in the case.

FIG. 23 is a diagram showing the relationship between x and the magnetic field intensity in the x direction generated by another sub-coil of which the angle formed by the linear portion of the wire bundle and the sub-coil of the other embodiment is different from that of the coil.

FIG. 24 is a diagram for explaining the action of a magnetic field generated by another sub-coil of the above-described other embodiment and the angle between the straight line portion of the wire bundle and the center of the coil is further different.

25 (a) and 25 (b) are diagrams showing wiring states of coils having different sub-coils.

FIG. 26 is a diagram showing a different arrangement of sub-coils with respect to the deflecting device.

27 (a) and 27 (b) are views for explaining the concentration of three electron beams in one row arrangement of a self-convergence in-line type color picture tube device.

28 (a) is a diagram mainly showing a distribution of a pincushion type horizontal deflection magnetic field generated by the deflection device, FIG.
(B) is a diagram mainly showing the distribution of the barrel-shaped vertical deflection magnetic field.

29 (a) to 29 (c) are diagrams showing a main part configuration for correcting a conventional coma aberration, respectively.

FIG. 30 is a diagram showing higher-order convergence errors that occur in a self-convergence in-line type color picture tube device.

[Explanation of symbols]

 20 ... Panel 21 ... Funnel 22 ... Phosphor screen 24 ... Neck 25 ... Electron gun 26B, 26R ... A pair of side beams 26G ... Center beam 28 ... Deflection device 30H ... Horizontal deflection coil 30V ... Vertical deflection coil 33 ... Sub coil 36 ... Drum 37 ... Straight part 38 ... Coil

Claims (5)

[Claims] 1. An envelope comprising a funnel-shaped funnel having a panel having a phosphor screen formed on the inner surface thereof and a cylindrical neck, and a plurality of beams arranged in the neck and arranged in a row. A first deflection coil that is mounted on the boundary between the large-diameter portion and the neck of the funnel and that deflects the plurality of beams in the arrangement direction of the plurality of beams, and is orthogonal to the arrangement direction of the plurality of beams. A deflecting device having a second deflecting coil for deflecting in a direction, and an even number of linear portions, which are arranged on the electron gun side of the deflecting device and extend along the tube axis, center around the tube axis. A color picture tube, which is arranged on the peripheral surface, and is provided with, in each of the linear portions, a sub-coil in which a current synchronized with a deflection current flowing in the deflecting device flows in an opposite direction to an adjacent linear portion. apparatus. 2. An envelope comprising a funnel-shaped funnel having a panel having a phosphor screen formed on the inner surface and a cylindrical neck, and a plurality of beams arranged in the neck and arranged in a row so as to pass in the same plane. And a first deflection coil that is mounted on the boundary between the large-diameter portion and the neck of the funnel and deflects the plurality of beams in the arrangement direction of the plurality of beams, and is orthogonal to the arrangement direction of the plurality of beams. A deflecting device having a second deflecting coil for deflecting in a direction, and an even number of linear portions, which are arranged on the electron gun side of the deflecting device and extend along the tube axis, center around the tube axis. A collar arranged on the peripheral surface, wherein each of the linear portions is provided with a sub-coil in which a current synchronized with a deflection current flowing in the first deflection coil flows in an opposite direction to an adjacent linear portion. Picture tube device. 3. An envelope comprising a funnel-shaped funnel having a panel having a phosphor screen formed on the inner surface and a cylindrical neck, and a plurality of beams arranged in the neck and arranged in a row so as to pass in the same plane. And a first deflection coil that is mounted on the boundary between the large-diameter portion and the neck of the funnel and deflects the plurality of beams in the arrangement direction of the plurality of beams, and is orthogonal to the arrangement direction of the plurality of beams. A deflecting device having a second deflecting coil for deflecting in a direction, and an even number of linear portions, which are arranged on the electron gun side of the deflecting device and extend along the tube axis, center around the tube axis. A collar arranged on the peripheral surface, wherein each of the linear portions is provided with a sub-coil in which a current synchronized with a deflection current flowing in the second deflection coil flows in an opposite direction to an adjacent linear portion. Picture tube device. 4. The color picture tube device according to claim 1, wherein the sub-coil has six linear portions. 5. The color picture tube device according to claim 1, wherein the sub-coil has ten linear portions.