JP2003178698A - Cathode ray tube device - Google Patents

Abstract

(57) [PROBLEMS] To provide a cathode ray tube device that facilitates dynamic convergence adjustment and has good convergence characteristics without mounting an additional correction coil and without requiring a special correction current generation correction circuit. provide. SOLUTION: A horizontal deflection coil is formed by winding a conductive wire, and on a cross section perpendicular to the tube axis, a winding angle θ1 where the horizontal direction in the electron gun side region is 0 °, and a horizontal direction in the intermediate region is 0 °. The line density of the conductive wire in the first part divided by a predetermined angle range around each of the winding angle θ2 of 0 ° and the winding angle θ3 of 0 ° in the horizontal direction in the screen side region is the first line. , The winding angle θ1, the winding angle θ2, and the winding angle θ3 of the first part are θ1 ≧ θ.
The relationship of 2 ≧ θ3 is satisfied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube device. In particular, the present invention relates to a cathode ray tube device having improved convergence characteristics of a deflection yoke.

[0002]

2. Description of the Related Art As an OS for personal computers,
As the multi-window environment represented by Windows (R) manufactured by Microsoft Corporation becomes widespread, in a cathode ray tube device used for a display monitor of a computer, it is an important technical subject to improve the resolution in the peripheral portion of the screen. Is coming.

As one of the factors that determine the resolution, there is a convergence characteristic indicating an aberration error (hereinafter, referred to as "misconvergence") of the blue, green and red emitting electron beams on the screen surface.

In a cathode ray tube device for a display monitor,
The misconvergence on the screen surface is adjusted to about 0.25 mm in the manufacturing process. In that case, it is relatively easy to adjust the misconvergence between the blue emission electron beam and the red emission electron beam, especially at the corners of the screen surface, whereas the green emission electron beam and the blue emission electron beam are adjusted. It is generally known that it is difficult to adjust misconvergence (hereinafter, referred to as “green misconvergence”) between an electron beam or an electron beam for emitting red light.

This is because when adjusting the convergence (hereinafter referred to as "dynamic convergence") in the corner portion of the screen surface, the ferrite stuck to the tip of the strip-shaped resin flat plate from the screen side opening of the deflection yoke. Although the powder-containing resin soft magnetic piece is inserted, the characteristic of the ferrite powder-containing resin soft magnetic piece is that the adjustment sensitivity to the green misconvergence is very low. Therefore, in order to obtain a good convergence characteristic, it is necessary to design in advance so that the green miss convergence at the corner portion of the screen surface becomes small. In particular, a state in which the green convergence is shifted outward at the four corners of the screen surface is called HGB, and a conventional technique for HGB correction will be described below.

In a conventional deflection yoke for a cathode ray tube device, as disclosed in, for example, Patent Document 1, an additional set of dedicated correction coils (subcoils) 23 on the electron gun side of the deflection yoke 20 and 24 are provided (Fig. 1
5). Then, the full-wave rectified current is generated by the vertical deflection circuit (not shown) to change the magnetic flux of the magnetic coil (not shown), so that the dedicated correction coils 23 and 24 are obtained.
A current is generated in the coil connected to, and a current is passed through the dedicated correction coils 23 and 24. As a result, a special magnetic field is generated in the dedicated correction coils 23 and 24, and HGB is corrected by this special magnetic field.

[0007]

[Patent Document 1] Japanese Patent No. 3053841

[0008]

However, according to the conventional technique described above, the dedicated correction coils 23 and 24 must be additionally mounted only for the purpose of correcting the HGB. was there. Further, there is a problem that the circuit for generating the correction current as described above has to be specially added to the auxiliary circuit in the deflection yoke. Since it is considered that the need for such an expansion increases the circuit loss and significantly increases the manufacturing cost, the burden of designing the deflection yoke, the cathode ray tube, and the like has also increased.

Further, by the above-described operation, HGB
The amount of improvement in HG depends on the amount of current flowing in the circuit, but on the other hand, it is necessary to keep the increase in horizontal deflection power and its circuit loss to a minimum.
It could not be said that a sufficient improvement amount of B was obtained.

In order to solve the above problems, the present invention provides
An object of the present invention is to provide a cathode ray tube device which does not have an additional correction coil and which does not require a correction circuit for generating a special correction current, facilitates dynamic convergence adjustment, and has good convergence characteristics.

[0011]

In order to achieve the above object, a cathode ray tube apparatus according to the present invention is a cathode ray tube main body having a glass panel and a glass funnel connected to the rear portion of the glass panel, and a cathode ray tube main body. Cathode ray tube device including an electron gun provided at a rear portion, a horizontal deflection coil arranged at an outer periphery of a rear portion of a cathode ray tube body, a vertical deflection coil provided outside the horizontal deflection coil, and a deflection yoke having a ferrite core. The horizontal deflection coil is formed by winding a conductive wire, and the horizontal deflection coil on the electron gun side is located from the midpoint between the end position of the horizontal deflection coil on the electron gun side and the position where the horizontal magnetic field strength is maximum. From the midpoint between the first region to the end position of, the end position of the horizontal deflection coil on the electron gun side and the position where the horizontal magnetic field strength is maximum,
The second area up to the midpoint between the tip position of the horizontal deflection coil on the screen side and the position where the horizontal magnetic field strength is maximum, and the tip position of the horizontal deflection coil on the screen side and the position where the horizontal magnetic field strength is maximum In the third region from the intermediate point to the tip position of the horizontal deflection coil on the screen side, on the cross section perpendicular to the tube axis, the winding angle θ1 in which the horizontal direction in the first region is 0 °, the second angle Winding angle θ2 with 0 ° in the horizontal direction in the area,
Winding angle θ3 with 0 ° in the horizontal direction in the third region
The linear density of the conductive wire in the first portion separated by a predetermined angle range centered on each of the is smaller than the linear density of the conductive wire in the second portion other than the first portion, A cathode ray tube device, wherein the winding angle θ1, the winding angle θ2, and the winding angle θ3 satisfy the relationship of (Equation 2).

[0012]

## EQU00002 ## .theta.1.gtoreq..theta.2.gtoreq..theta.3 With such a configuration, HGB can be controlled only by the horizontal coil magnetic field, and HGB can be effectively reduced. Therefore, dynamic convergence adjustment is facilitated and good convergence characteristics are obtained. It is possible to obtain a cathode ray tube device having

Further, in a cathode ray tube device having a similar structure, a first part divided into a predetermined angle range centering on a winding angle having a horizontal direction of 0 ° on a cross section perpendicular to the tube axis. , The winding angle of the first portion in at least two areas of the first area, the second area, and the third area, and in the area on the electron gun side of the two areas is Even if the winding angle is larger than the winding angle of the first portion in the area, the same effect can be expected.

Furthermore, in a cathode ray tube device having the same structure, the horizontal direction is 0 ° on a cross section perpendicular to the tube axis.
Even if the first portion divided into a predetermined angle range centered around the winding angle is in any one of the first area, the second area, and the third area, The effect of can be expected.

Further, in the cathode ray tube device according to the present invention, it is preferable that the predetermined angle range is a portion divided by ± 2 ° about the winding angle.

Further, in the cathode ray tube device according to the present invention, it is preferable that the first portion has a concave portion of a predetermined shape formed in the horizontal deflection coil.

Further, in the cathode ray tube device according to the present invention, it is preferable that the thickness of the horizontal deflection coil of the first portion is less than 40% of the maximum thickness of the horizontal deflection coil.

Further, in the cathode ray tube device according to the present invention, the winding angle θ1 is preferably in the range of 35 ° ≦ θ1 ≦ 65 °, and the winding angle θ2 is in the range of 25 ° ≦ θ2 ≦ 55 °. Preferably, the winding angle θ3 is 15 ° ≦ θ3 ≦
It is preferably in the range of 45 °.

[0019]

DETAILED DESCRIPTION OF THE INVENTION A cathode ray tube device according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a cathode ray tube device according to an embodiment of the present invention.

In FIG. 1, the cathode ray tube main body 36 comprises a glass panel 37 and a glass funnel 38 connected to the rear portion of the glass panel 37. An electron gun is provided at the rear of the cathode ray tube body 36. Also,
On the outer periphery of the rear part of the cathode ray tube body 36, a horizontal deflection coil 39 wound in a saddle shape, a saddle type vertical deflection coil 40 provided outside the horizontal deflection coil 39, and an outside of the vertical deflection coil 40 are provided. A deflection yoke 42 composed of a ferrite core 41 is attached.

FIG. 2 shows x including the tube axis Z of the deflection yoke 42.
It is a transverse cross-sectional view showing only a horizontal deflection coil 39, which is simplified without showing the coil copper wires one by one, with respect to the cross section in the -z plane. 3 is a vertical cross-sectional view of the horizontal deflection coil 39 shown in FIG. Figure 3
Then, the angle θ is defined as an angle toward the vertical axis direction (y direction), with the horizontal axis direction (x direction) being 0 °.
A region (hereinafter, referred to as a “housing”) in which the horizontal deflection coil 39 is represented by an envelope of a coil copper wire located outside is illustrated. It should be noted that the housing corresponds to a mold shape when the coil copper wire is wound to form a horizontal deflection coil.

That is, the shape of the horizontal deflection coil 39 in the cathode ray tube apparatus according to the present embodiment is, as shown in FIG. 2, the end position 2 of the horizontal deflection coil on the electron gun side.
21 from the intermediate point 222 between the position 223 where the horizontal magnetic field strength is maximum and the terminal position 221 of the horizontal deflection coil on the electron gun side (hereinafter, referred to as “electron gun side area”) 3 from the electron gun side. From the midpoint 222 between the end position 221 of the horizontal deflection coil and the position 223 where the horizontal magnetic field strength is maximum, the tip position 225 of the horizontal deflection coil on the screen side and the position 2 where the horizontal magnetic field strength is maximum.
Area up to a midpoint 224 with 23 (hereinafter, “intermediate area”)
Say. 4) and the tip position 225 of the horizontal deflection coil on the screen side and the position 2 where the horizontal magnetic field strength is maximum.
23 toward the tip position 225 of the horizontal deflection coil on the screen side (hereinafter, referred to as “screen side area”) 5 (positive z direction), the shape of the funnel cone conforms. It has a saddle-like shape that is cut in half from the conical shape that was formed.

Then, as shown in FIG. 3, the linear density of the conductive wire in the first portion 31 (shaded portion of the left slant) which divides the housing within a predetermined angle range around the winding angle θ is equal to that of the housing. It is characterized in that it is smaller than the line density of the conductive wires in the second portion 32 (the right slanted portion) other than the first portion 31. As a configuration in which the linear density of the conductive wires in the first portion 31 is smaller than that in the second portion 32, for example, a portion in which a part of the horizontal deflection coil is depressed to form a concave portion (hereinafter, “three-dimensional shape”) That is)) can be realized.

Further, in the electron gun side region 3, the winding angle θ1 of the first portion 31 in which the linear density of the conductive wire is smaller than that of the second portion 32 is in the range of 35 ° ≦ θ1 ≦ 65 °. Then, in the intermediate region 4, the winding angle θ2 is 25
In the range of ° ≦ θ2 ≦ 55 °, the winding angle θ3 is provided in the range of 15 ° ≦ θ3 ≦ 45 ° in the screen side region 5.

Further, this three-dimensional shape is ± 2 with respect to the winding angle θ in the vertical sectional view of the horizontal deflection coil in the cathode ray tube apparatus according to the embodiment of the present invention, as in FIG.
FIG. 3 shows the thickness of the horizontal deflection coil in the diametrical direction (the diametrical direction in a substantially circular shape around the tube axis) on the cross section perpendicular to the tube axis of the housing portion in the concentric cells divided by °. It is characterized in that the thickness 14 is less than 40% with respect to the maximum thickness 13 in the substantially diametrical direction of the horizontal deflection coil on the cross section perpendicular to the tube axis.

FIG. 4 is a diagram showing the HGB pattern, in which the green light emitting electron beam 21, the blue light emitting electron beam and the red light emitting electron beam 22 are provided at the center of the right side and the center of the left side of the screen surface. On the other hand, in the corner portion, the upper and lower portions of the green light emitting electron beam 21 are distorted outward with respect to the blue light emitting electron beam and the red light emitting electron beam 22. Such an HGB pattern appears when HCR is corrected, for example, and becomes more prominent as the screen surface becomes flatter.

The principle for correcting HGB will be described below.

It is considered that the HGB is generated because the control of the main pincushion magnetic field on the horizontal axis is weakened when the electron beam is deflected to the diagonal peripheral portion of the screen surface. Therefore, in order to improve such HGB, it is sufficient to emphasize the main pincushion magnetic field more when the electron beam is deflected toward the diagonal peripheral portion.

At the same time, emphasizing the main pincushion magnetic field means emphasizing the barrel magnetic field at the diagonal peripheral portion in the diagonal magnetic field. It is considered that the effect becomes more prominent the closer to the horizontal deflection coil.

The effects of the cathode ray tube device according to the embodiment of the present invention will be described below in order of the electron gun side region 3, the intermediate region 4 and the screen region 5.

First, the electron gun side region 3 will be described.
FIG. 5 shows a state of the beam arrangement and the horizontal deflection magnetic field in the electron gun side region 3 by modeling a cross section perpendicular to the tube axis. As shown in FIG. 5, the horizontal deflection magnetic field is relatively close to the uniform magnetic field in the electron gun side region 3, and only the vertical pre-deflection is affected.

Here, the vertical pre-deflection means that a U-shaped silicon steel plate 62 as shown in FIG. 6 is vertically symmetrical to the N pole / S pole at the rear end 61 on the deflection yoke electron gun side shown in FIG. In addition, it is a function of correcting coma by supplying a vertical deflection current to the vertical auxiliary correction coil 63. That is, at the rear end 61 on the electron gun side, the coma aberration can be corrected by pulling the green light emitting electron beam 21 upward from the blue light emitting electron beam and the red light emitting electron beam 22 in the y direction. Become.

However, such a correction effect is more remarkable in a region closer to the electron gun, and as shown in FIG. 7, the green light emitting electron beam 21 emitted in the tube axis direction (positive z direction). The orbit (solid line portion) is higher than the orbits (broken line portion) of the blue light emitting electron beam and the red light emitting electron beam 22 from the electron gun side region 3 to the screen side region 5 by y.
It can be seen that the amount of change becomes smaller in the direction.

In FIGS. 8A and 8B, the horizontal axis represents the y direction, the vertical axis represents the vertical magnetic field strength, and z = 5 (mm) is changed from the position where the vertical magnetic field strength is maximum. The vertical magnetic field distribution in this case is shown. Note that FIG. 8A shows a case where the electron gun side is changed, and FIG.
Shows the case where the screen is changed.

In FIGS. 8A and 8B, 10
0 indicates the position where the vertical magnetic field strength is maximum, and 10
Reference numeral 1 denotes an intermediate point between the position where the vertical magnetic field strength is maximum and the end position of the horizontal deflection coil on the electron gun side.
Reference numeral 02 denotes an intermediate point between the position where the vertical magnetic field strength is maximum and the end position of the horizontal deflection coil on the screen side. In addition, in FIGS. 8A and 8B, from the terminal position of the horizontal deflection coil on the electron gun side to the intermediate point 101.
The area up to is the electron gun side area 103, and the intermediate point 10
An area from 1 to the intermediate point 102 is an intermediate area 104 on the screen side, and an area from the intermediate point 102 to the end position of the horizontal deflection coil on the screen side is an area 105 on the screen side.

As shown in FIGS. 8 (a) and 8 (b),
The electron gun side region 103 shows a pincushion magnetic field pattern, and the intermediate region 104 shows a barrel magnetic field pattern. In the screen side area 105,
The pattern of the weak barrel field is shown.

Therefore, not only in the rear end 61 of the electron gun side area, but in a wide area extending from the electron gun side area 3 toward the screen side area 5, a force opposite to the vertical magnetic field shown in FIG. Will be there. Regarding the magnitude of the force applied to the electron beam, the green light emitting electron beam 21 is larger than the blue light emitting electron beam 22 and the red light emitting electron beam 22.

Therefore, as shown in FIG. 7, the green light emitting electron beam 21 is pulled upward in the y direction in the electron gun side region 3 (away from the tube axis), and from the electron gun side to the screen side. As it advances, it will be pulled toward the tube axis (the absolute value of y will decrease).

According to FIG. 5, in the electron gun side region 3, almost no horizontal pincushion magnetic field is applied, but only vertical pre-deflection is applied. Therefore, the positions of the green light emitting electron beam 21 in the vertical direction (y direction) are slightly above the positions of the red light emitting electron beam and the blue light emitting electron beam 22.

HGB correction can be performed by utilizing the effect of the vertical pre-deflection. That is, assuming that a region 80 (hatched portion in the drawing) shown in FIG. 5 exists, the force received by the green light emitting electron beam 21 is red light emission, as indicated by the white arrow shown in FIG. Force in the horizontal plus direction is larger than the force received by the emission electron beam and the blue emission electron beam 22.

However, in this embodiment, since the region 80 is substantially eliminated, that is, the recess is formed, the force that the electron beam receives from the vertical pre-deflection is a black arrow pointing in the horizontal minus direction. The force received by the green light emitting electron beam 21 is smaller in the horizontal plus direction than the force received by the red light emitting electron beam and the blue light emitting electron beam 22. This effect is considered to be greater as the electron beam trajectory is closer to the region 80.

As described above, by forming the above-mentioned concave portion in the electron gun side region 3, FIG.
The HGB pattern shown in FIG. 9 can be corrected as shown in FIG.

The means for correcting the HGB pattern is not limited to the means for eliminating the region 80, that is, the means for forming the recess, but a cavity is provided in the housing, or an insulator is sandwiched in the cavity. It may be a loose structure. In addition, instead of forming the concave portion, as shown in FIG.
The number of windings in the first part 31 shown in
The linear density of the first portion 31 can be made smaller than the linear density of the second portion 32 even with a configuration in which the number of windings in 2 is reduced, that is, a configuration in which the winding density is reduced. Therefore, with these configurations, it is possible to achieve the effects described above.

Next, the effect of the intermediate region 4 will be described. FIG. 10 shows a state of the beam array and the horizontal deflection magnetic field in the intermediate region 4, which is modeled for a cross section perpendicular to the tube axis.

In the intermediate region 4, the horizontal deflection magnetic field is a weak pincushion magnetic field, and the vertical pre-deflection effect is slightly weaker than that in the electron gun side region 3. Here, since the horizontal deflection pincushion magnetic field is strongly applied, as shown in FIG. 10, the position of the green emission electron beam 21 in the horizontal direction (x direction) is set to the blue emission electron beam 2 and the red emission electron beam 2.
The position of the green light emitting electron beam 21 in the vertical direction (y direction) is also outside the position 2 and is subjected to a weaker vertical pre-deflection, so that the blue light emitting electron beam and the red light emitting electron beam 21 are also positioned. It is slightly above the position of the beam 22.

Then, as in the case of the electron gun side region 3,
HGB correction can be performed. That is, assuming that the region 81 (hatched portion in the figure) shown in FIG. 10 exists, the force received by the electron beam 21 for green light emission is for blue light emission and red light emission as shown by the white arrow in FIG. It becomes larger in the horizontal plus direction than the force that the electron beam 22 receives.

However, in the present embodiment, the area 81
Is eliminated, that is, a concave portion is formed, so that the force received by the three electron beams becomes a black arrow pointing in the horizontal minus direction, and the force received by the green light emitting electron beam 21 is red light emitting and blue light emitting. It is shown that the force in the horizontal plus direction is smaller than the force that the electron beam 22 for use receives. This effect is considered to be greater as the trajectory of the electron beam is closer to the area 81.

As a result of the above, even in the intermediate region 4, by providing a recess in a part of the horizontal deflection coil,
The HGB pattern shown in FIG. 4 is converted into the HGB pattern shown in FIG.
It can be corrected to a pattern.

The means for correcting the HGB pattern is not limited to the means for eliminating the region 81, that is, the means for forming the concave portion, and a cavity is provided in the housing, or an insulator is sandwiched in the cavity. It may be a loose structure. In addition, instead of forming the concave portion, as shown in FIG.
The number of windings in the first part 31 shown in
The linear density of the first portion 31 can be made smaller than the linear density of the second portion 32 even with a configuration in which the number of windings in 2 is reduced, that is, a configuration in which the winding density is reduced. Therefore, with these configurations, it is possible to achieve the effects described above.

Next, the effect of the screen side area 5 will be described. FIG. 11 shows a state of the beam arrangement and the horizontal deflection magnetic field in the screen side region 5 by modeling the cross section perpendicular to the tube axis. In the screen side region 5, the horizontal deflection magnetic field is a pincushion magnetic field, and the vertical pre-deflection effect is considerably weaker than that in the electron gun side region 3.

Since the horizontal deflection pincushion magnetic field is applied here, as shown in FIG. 11, the horizontal direction (x
The position of the green emission electron beam 21 in the direction) is considerably outside of the positions of the blue emission electron beam 22 and the red emission electron beam 22. Further, since the vertical pre-deflection is considerably weakened and applied, the position of the green emitting electron beam 21 in the vertical direction (y direction) is also slightly above the positions of the blue emitting and red emitting electron beams 22. Has become.

Then, as in the case of the electron gun side region 3,
HGB correction can be performed. That is, assuming that a region 82 (hatched portion in the drawing) shown in FIG. 11 exists, the force received by the electron beam 21 for green light emission is for red light emission and blue light emission as shown by the white arrow in the region 82. It becomes larger in the horizontal plus direction than the force that the electron beam 22 receives.

However, in the present embodiment, the area 82
Is eliminated, that is, a concave portion is formed, so that the forces received by the three electron beams become black arrows pointing in the horizontal minus direction, and the forces received by the green light emitting electron beam 21 are red light emitting and blue light emitting. It is shown that the force applied to the light emitting electron beam 22 is smaller in the horizontal plus direction. It is considered that this effect is greater as the trajectory of the electron beam is closer to the region 82.

As described above, the HGB pattern shown in FIG. 4 is changed to the HGB pattern shown in FIG. 9 by providing the concave portion in a part of the horizontal deflection coil in the screen side region 5.
It can be corrected to a pattern.

The means for correcting the HGB pattern is not limited to the means for eliminating the region 82, that is, the means for forming the recess, but a cavity is provided in the housing, or an insulator is sandwiched in the cavity. It may be a loose structure. In addition, instead of forming the concave portion, as shown in FIG.
The number of windings in the first part 31 shown in
The linear density of the first portion 31 can be made smaller than the linear density of the second portion 32 even with a configuration in which the number of windings in 2 is reduced, that is, a configuration in which the winding density is reduced. Therefore, with these configurations, it is possible to achieve the effects described above.

Next, the winding angles θ1 and θ of the recesses provided in the electron gun side region 3, the intermediate region 4 and the screen region 5 are formed.
An experiment was conducted on the relationship between 2, θ3 and the amount of change in HGB, and the result will be described with reference to FIG. Figure 1
2, the vertical axis represents the amount of change in HGB (mm), and the horizontal axis represents the winding angles θ1, θ2, and θ3 (°). Note that the recess was provided only in any one of the electron gun side region 3, the intermediate region 4, and the screen region 5 for the experiment.

□ indicates HG in the electron gun side area 3.
B indicates the change amount transition of B, Δ indicates the change amount transition of HGB in the intermediate region 4, and ○ indicates HGB change in the screen region 5.
The changes in the amount of change are shown respectively.

In FIG. 12, it is considered that the HGB pattern is effectively corrected when the amount of change in HGB is minus (-). Therefore, the range of the winding angle is 35 ° ≦ θ1 in the electron gun side region 3.
≦ 65 °, 25 ° ≦ θ2 ≦ 55 in the intermediate region 4
°, 15 ° ≦ θ3 ≦ 45 in the screen side area 5
It is obvious that each is preferably 0 °.

As described above, since the influence itself of the preliminary vertical deflection magnetic field fluctuates from the electron gun side region 3 to the screen side region 5, it is necessary to set the winding angle according to each region. is there. That is, since the effect of the preliminary vertical deflection magnetic field becomes weaker as the electron gun side region 3 moves to the screen side region 5, the winding angle may gradually become smaller as it moves to the screen side region 5. Would be preferable. Therefore, it is desirable that the winding angles θ1, θ2, and θ3 have the relationship shown in (Equation 3).

[0060]

## EQU00003 ## .theta.1.gtoreq..theta.2.gtoreq..theta.3. In general, the effect of the deflection magnetic field theory on the electron beam does not hold. That is, the copper wires are not evenly arranged in the cross-sectional area of the housing, and each of them is in a disordered state.

In such a state, it is difficult to control with a magnetic field, and it is also difficult to uniquely predict the influence of the magnetic field. Therefore, regarding the three-dimensional shape according to the present embodiment, the line space factor is Is preferably 50% or more.

FIG. 13 is a diagram showing the relationship between the thickness ratio in the substantially diametrical direction (thickness ratio to the maximum thickness on the cross section perpendicular to the tube axis) and the improvement value of the misconvergence HGB. Note that, in FIG. 13, a, b, and c are the cases where the recesses are provided in the intermediate region 4 with the winding angle of about 35 °, and the thickness ratios are 50%, 40%, and 2
The cases of 8% are shown.

As is clear from FIG. 13, the degree of improvement of HGB is significantly improved when the thickness ratio is 40 to 50%, so that it is more effective when the thickness ratio is less than 40%. it is conceivable that.

FIG. 14 shows the effect of improving the HGB when the three-dimensional shape of the horizontal deformation coil is used in the cathode ray tube apparatus according to the present embodiment as described above. In FIG. 14, the general shape means a standard coil shape, and the conventional technology is an experiment in which the additional correction coils (subcoils) 23 and 24 shown in FIG. It means data. Note that the HGB improvement numerical values in FIG. 14 are in the left and right portions on the screen surface of the cathode ray tube device as shown in FIG.

As is clear from FIG. 14, in comparison with the conventional technique, when the coil having the three-dimensional shape according to the present embodiment is used, HGB is further reduced by −0.20 (m).
It can be seen that m) is also improved. This is because the conventional technique performs the HGB correction later using the correction current, and thus it is presumed that there is a limit due to the mechanism or the current amount, whereas in the present embodiment, ,
It is considered that the effect was further enhanced because the factors causing the HGB were fundamentally improved according to the cause.

Further, as shown in FIG. 14, since the HGB can be improved by the coil alone, the variation degree is about 50% of the conventional technique, which is as small as the coil alone. ing.

[0067]

As described above, according to the cathode ray tube apparatus of the present invention, the value of HGB appearing in the diagonally peripheral portion of the screen surface can be greatly improved, and the coil can be stably produced. At the same time, it is possible to realize a high-definition deflection yoke. And the manufacturing yield also becomes the deflection yoke variation only by the variation value due to the coil, and by reducing the variation by about 50% or more, the dynamic convergence adjustment becomes easy,
It is possible to obtain a cathode ray tube device having good convergence characteristics with good ITC adjustment efficiency.

[Brief description of drawings]

FIG. 1 is a plan view of a cathode ray tube device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a horizontal deflection coil in the cathode ray tube device according to the embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view of a horizontal deflection coil in a cathode ray tube device according to an embodiment of the present invention.

FIG. 4 is an HGB pattern explanatory diagram.

FIG. 5 is an explanatory diagram of a beam arrangement and a horizontal deflection magnetic field in the electron gun side region.

FIG. 6 is an explanatory diagram of vertical pre-deflection (during upward deflection).

FIG. 7 is an explanatory diagram of an electron beam trajectory.

FIG. 8 is a vertical magnetic field distribution diagram in the deflection yoke.

FIG. 9 is an explanatory diagram of an HGB pattern after correction.

FIG. 10 is an explanatory diagram of a beam arrangement and a horizontal deflection magnetic field in the intermediate region.

FIG. 11 is an explanatory diagram of a beam arrangement and a horizontal deflection magnetic field in the screen side area.

FIG. 12 is a diagram showing an HGB change amount when a three-dimensional shape of a horizontal deflection coil is used in the cathode ray tube device according to the present embodiment.

FIG. 13 is a diagram showing a relationship between a thickness ratio in a substantially diametrical direction and an improvement value of misconvergence HGB.

FIG. 14 is a diagram showing an HGB improving effect when a three-dimensional shape of a horizontal deflection coil is used in the cathode ray tube device according to the present embodiment.

FIG. 15 is a perspective view of a deflection yoke peripheral portion in a conventional cathode ray tube device.

[Explanation of symbols]

3 Electron Gun Side Area 4 Intermediate Area 5 Screen Side Area 11 Housing Cross Section Area 12 Copper Wire Cross Section Area 14 Approximate Diameter Thickness 20, 42 Deflection Yoke 21 Green Light Emitting Electron Beam 22 Blue Light Emitting Electron Beam and Red Light Emitting Electron Beam 23, 24 Dedicated correction coil (sub-coil) 31 First part 32 Second part 36 Cathode ray tube body 37 Glass panel 38 Glass funnel 39 Horizontal deflection coil 40 Vertical deflection coil 41 Ferrite core 61 Electron gun side rear end 62 Y-shaped Type silicon steel plate 63 vertical replenishment correction coils 80, 81, 82 region 221 midpoint 223 of terminal positions 222 221 and 223 of the horizontal deflection coil on the side of the electron gun 225 midpoint 225 between horizontal magnetic field strengths 224 223 and 225 screen Position of the horizontal deflection coil on the side

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[Procedure amendment]

[Submission date] September 24, 2002 (2002.9.2)
4)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

## EQU1 ## θ1 ≧ θ2 ≧ θ3

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

FIG . 2 shows only the horizontal deflection coil 39 which is simplified without showing the coil copper wires one by one from the bottom.
It is a figure . Further, FIG. 3 shows the horizontal deflection coil 3 shown in FIG.
9 is a vertical cross-sectional view taken along the line 9-9 in FIG. In FIG. 3, the winding angle θ is defined as an angle toward the vertical axis direction (y direction) with 0 ° in the horizontal axis direction (x direction), and the horizontal deflection coil 39 is positioned outside. The area | region (henceforth a "housing") represented by the envelope of the coil copper wire which shows is shown. It should be noted that the housing corresponds to a mold shape when the coil copper wire is wound to form a horizontal deflection coil.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

Then, as shown in FIG. 3, the linear density of the conductive wire in the first portion 31 (shaded portion of the left slant) which divides the housing within a predetermined angle range around the winding angle θ is equal to that of the housing. It is characterized in that it is smaller than the line density of the conductive wires in the second portion 32 (the right slanted portion) other than the first portion 31. As a configuration in which the linear density of the conductive wires in the first portion 31 is smaller than that in the second portion 32, for example, a portion in which a part of the horizontal deflection coil is depressed to form a concave portion (hereinafter, “three-dimensional shape”) That is)) can be realized. Where linear density and
Is when the deflection coil is cut in the tube axis (Z axis) cross section.
It means the ratio of lines per unit area.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction content]

Further, in the electron gun side region 3, the winding angle θ1 of the first portion 31 in which the linear density of the conductive wire is smaller than that of the second portion 32 is in the range of 35 ° ≦ θ1 ≦ 65 °. Then, in the intermediate region 4, the winding angle θ2 is 25
In the range of ° ≦ θ2 ≦ 55 °, the winding angle θ3 is provided in the range of 15 ° ≦ θ3 ≦ 45 ° in the screen side region 5. That is, the electron gun side region 3, the intermediate region
In the recesses provided in the area 4 and the screen side area 5
In addition, the recess is from the electron gun side region 3 to the screen side region.
It is wound so that it gradually changes toward 5
It is characterized by that.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

First, the electron gun side region 3 will be described.
FIG. 5 shows a state of the beam arrangement and the horizontal deflection magnetic field in the electron gun side region 3 by modeling a cross section perpendicular to the tube axis. As shown in FIG. 5, the horizontal deflection magnetic field is relatively close to the uniform magnetic field in the electron gun side region 3, and the vertical pre-deflection is strongly affected.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0060

[Correction method] Change

[Correction content]

[0060]

## EQU00003 ## .theta.1.gtoreq..theta.2.gtoreq..theta.3. In general, the effect of the deflection magnetic field theory on the electron beam does not hold. That is, the copper wires are not evenly arranged in the cross-sectional area of the housing, and each of them is in a disordered state. Here, the space factor is about the existence of the deflection coil.
The ratio of the actual coil occupied in the existing area
Means

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0064

[Correction method] Change

[Correction content]

FIG. 14 shows the effect of HGB improvement when the three-dimensional shape of the horizontal deflection coil is used in the cathode ray tube apparatus according to the present embodiment as described above. In FIG. 14, the general shape means a standard coil shape, and the conventional technology is an experiment in which the additional correction coils (subcoils) 23 and 24 shown in FIG. It means data. Note that the HGB improvement numerical values in FIG. 14 are in the left and right portions on the screen surface of the cathode ray tube device as shown in FIG.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a plan view of a cathode ray tube device according to an embodiment of the present invention.

FIG. 2 is a view of a horizontal deflection coil in a cathode ray tube device according to an embodiment of the present invention as seen from below .

FIG. 3 is a vertical cross-sectional view of a horizontal deflection coil in a cathode ray tube device according to an embodiment of the present invention.

FIG. 4 is an HGB pattern explanatory diagram.

FIG. 5 is an explanatory diagram of a beam arrangement and a horizontal deflection magnetic field in the electron gun side region.

FIG. 6 is an explanatory diagram of vertical pre-deflection (during upward deflection).

FIG. 7 is an explanatory diagram of an electron beam trajectory.

FIG. 8 is a vertical magnetic field distribution diagram in the deflection yoke.

FIG. 9 is an explanatory diagram of an HGB pattern after correction.

FIG. 10 is an explanatory diagram of a beam arrangement and a horizontal deflection magnetic field in the intermediate region.

FIG. 11 is an explanatory diagram of a beam arrangement and a horizontal deflection magnetic field in the screen side area.

FIG. 12 is a diagram showing an HGB change amount when a three-dimensional shape of a horizontal deflection coil is used in the cathode ray tube device according to the present embodiment.

FIG. 13 is a diagram showing a relationship between a thickness ratio in a substantially diametrical direction and an improvement value of misconvergence HGB.

FIG. 14 is a diagram showing an HGB improving effect when a three-dimensional shape of a horizontal deflection coil is used in the cathode ray tube device according to the present embodiment.

FIG. 15 is a perspective view of a deflection yoke peripheral portion in a conventional cathode ray tube device.

Claims (11)

[Claims] 1. A cathode ray tube body having a glass panel and a glass funnel connected to a rear portion of the glass panel, an electron gun provided at a rear portion of the cathode ray tube body, and an outer periphery of a rear portion of the cathode ray tube body. A horizontal deflection coil, a vertical deflection coil provided outside the horizontal deflection coil, and a deflection yoke having a ferrite core, wherein the horizontal deflection coil is wound with a conductive wire. A first region from the midpoint between the end position of the horizontal deflection coil on the electron gun side and the position where the horizontal magnetic field strength is maximum to the end position of the horizontal deflection coil on the electron gun side, the electron gun side From the midpoint between the end position of the horizontal deflection coil and the position where the horizontal magnetic field strength is maximum, to the tip position of the horizontal deflection coil on the screen side. Second region of the flat magnetic field strength to an intermediate point between the position which is the maximum,
And a cross section perpendicular to the tube axis in the third region from the midpoint between the tip position of the horizontal deflection coil on the screen side and the position where the horizontal magnetic field strength is maximum to the tip position of the horizontal deflection coil on the screen side. In the above, a winding angle θ1 in which the horizontal direction in the first region is 0 °, a winding angle θ2 in which the horizontal direction in the second region is 0 °, and a horizontal direction in the third region is 0 ° The linear density of the conductive wire in the first part divided by a predetermined angle range around each of the winding angles θ3 is defined as the linear density of the conductive wire in the second part other than the first part. The cathode ray tube device is characterized in that the winding angle θ1, the winding angle θ2, and the winding angle θ3 of the first portion satisfy the relationship of (Equation 1). ## EQU1 ## θ1 ≧ θ2 ≧ θ3 2. A cathode ray tube body having a glass panel and a glass funnel connected to a rear portion of the glass panel, an electron gun provided at a rear portion of the cathode ray tube body, and an outer periphery of a rear portion of the cathode ray tube body. A horizontal deflection coil, a vertical deflection coil provided outside the horizontal deflection coil, and a deflection yoke having a ferrite core, wherein the horizontal deflection coil is wound with a conductive wire. A first region from the midpoint between the end position of the horizontal deflection coil on the electron gun side and the position where the horizontal magnetic field strength is maximum to the end position of the horizontal deflection coil on the electron gun side, the electron gun side From the midpoint between the end position of the horizontal deflection coil and the position where the horizontal magnetic field strength is maximum, to the tip position of the horizontal deflection coil on the screen side. Second region of the flat magnetic field strength to an intermediate point between the position which is the maximum,
And a cross section perpendicular to the tube axis in a third region from the midpoint between the tip position of the horizontal deflection coil on the screen side and the position where the horizontal magnetic field strength is maximum to the tip position of the horizontal deflection coil on the screen side. The first portion, which is divided in a predetermined angle range around the winding angle whose horizontal direction is 0 °, is at least two of the first region, the second region, and the third region. In the region, the winding angle of the first portion in the region on the electron gun side of the two regions is
Greater than the winding angle of the first portion in the area on the screen side, and the linear density of the conductive wire in the first portion, of the conductive wire in the second portion other than the first portion. A cathode ray tube device characterized by being smaller than a linear density. 3. A cathode ray tube body having a glass panel and a glass funnel connected to the rear portion of the glass panel, an electron gun provided at the rear portion of the cathode ray tube body, and an outer periphery of the rear portion of the cathode ray tube body. A horizontal deflection coil, a vertical deflection coil provided outside the horizontal deflection coil, and a deflection yoke having a ferrite core, wherein the horizontal deflection coil is wound with a conductive wire. In the first region from the midpoint between the end position of the horizontal deflection coil on the electron gun side and the position where the horizontal magnetic field strength is maximum to the end position of the horizontal deflection coil on the electron gun side, the tube axis On a cross section perpendicular to the first region, the first region is divided into a predetermined angle range around the winding angle θ1 in which the horizontal direction is 0 ° in the first region. The cathode ray tube device is characterized in that the line density of the conductive line is smaller than the line density of the conductive line in the second part other than the first part. 4. A cathode ray tube body having a glass panel and a glass funnel connected to the rear portion of the glass panel, an electron gun provided at the rear portion of the cathode ray tube body, and an outer periphery of the rear portion of the cathode ray tube body. A horizontal deflection coil, a vertical deflection coil provided outside the horizontal deflection coil, and a deflection yoke having a ferrite core, wherein the horizontal deflection coil is wound with a conductive wire. From the midpoint between the end position of the horizontal deflection coil on the electron gun side and the position where the horizontal magnetic field strength is maximum, the tip position of the horizontal deflection coil on the screen side and the position where the horizontal magnetic field strength is maximum In the second region up to the midpoint, on a cross section perpendicular to the tube axis, with the winding angle θ2 being 0 ° in the horizontal direction in the second region as the center Then, the line density of the conductive wire in the first portion divided by a predetermined angle range is smaller than the line density of the conductive wire in the second portion other than the first portion, the cathode line Tube device. 5. A cathode ray tube body having a glass panel and a glass funnel connected to the rear portion of the glass panel, an electron gun provided at the rear portion of the cathode ray tube body, and an outer periphery of the rear portion of the cathode ray tube body. A horizontal deflection coil, a vertical deflection coil provided outside the horizontal deflection coil, and a deflection yoke having a ferrite core, wherein the horizontal deflection coil is wound with a conductive wire. In the third region from the midpoint between the tip position of the horizontal deflection coil on the screen side and the position where the horizontal magnetic field strength is maximum to the tip position of the horizontal deflection coil on the screen side, On a different cross section, a first part divided into a predetermined angle range around a winding angle θ3 having a horizontal direction of 0 ° in the third region. The cathode ray tube device is characterized in that the line density of the conductive line in the minute portion is smaller than the line density of the conductive line in the second portion other than the first portion. 6. The cathode ray tube device according to claim 1, wherein the predetermined angle range is a portion divided by ± 2 ° about a winding angle. 7. The cathode ray tube device according to claim 1, wherein a concave portion having a predetermined shape is formed in the horizontal deflection coil in the first portion. 8. The cathode ray tube device according to claim 7, wherein the thickness of the horizontal deflection coil of the first portion is less than 40% of the maximum thickness of the horizontal deflection coil. 9. The winding angle θ1 is 35 ° ≦ θ1 ≦ 65.
The cathode ray tube device according to any one of claims 1 to 3, which is in a range of °. 10. The winding angle θ2 is 25 ° ≦ θ2 ≦ 5.
The cathode ray tube device according to claim 1, 2 or 4, which is in a range of 5 °. 11. The winding angle θ3 is 15 ° ≦ θ3 ≦ 4.
The cathode ray tube apparatus according to claim 1, wherein the cathode ray tube apparatus is in a range of 5 °.