JP4053537B2 - Color picture tube device - Google Patents

Description

  The present invention relates to a color picture tube apparatus used for a television or a computer display.

  In recent years, energy saving of electrical products has been promoted from the viewpoint of protecting the global environment. In color picture tube devices, energy-saving technology centered on deflection power is being introduced.

In order to reduce the deflection power, for example, Patent Document 1 discloses a deflection yoke as shown in FIG. FIG. 7 is a partial cross-sectional view of the deflection yoke along a plane perpendicular to the tube axis. In FIG. 7, the X axis indicates a horizontal axis, and the Y axis indicates a vertical axis. The deflection yoke 100 includes an insulating frame 101, a pair of upper and lower saddle type horizontal deflection coils 102 provided on the inner surface side of the insulating frame 101, and a pair of left and right saddle type vertical deflection coils provided on the outer surface side of the insulating frame 101. 103 and a core 104 that covers the outer surface side of the saddle type vertical deflection coil 103. Reference numeral 2 denotes a color picture tube funnel. A pair of upper and lower magnetic projections 104a are provided in the vicinity of the position of the inner surface of the core 104 where the Y-axis intersects. The pair of upper and lower magnetic projections 104 a pass between the pair of left and right saddle type vertical deflection coils 103 and project to the vicinity of the pair of upper and lower saddle type horizontal deflection coils 102. As a result, the top portions of the pair of upper and lower magnetic projections 104a can be brought close to the deflection region of the electron beam, so that the magnetic resistance of the horizontal deflection magnetic field can be reduced and the horizontal deflection magnetic field in the deflection region can be increased. As a result, the deflection power can be reduced.
JP 2003-208859 A

In the conventional deflection yoke 100, the deflection power reduction effect increases as the horizontal width W ₀ of the pair of upper and lower magnetic projections 104a is increased. However, when the horizontal width W ₀ is increased, the horizontal distance between the pair of left and right saddle type vertical deflection coils 103 is increased in order to avoid interference with the magnetic projection 104a, and the barrel field of the vertical deflection magnetic field becomes more than necessary. There was a problem that misconvergence and raster distortion occurred.

  That is, in the above-described conventional deflection yoke, it is difficult to further reduce the horizontal deflection power while forming a barrel magnetic field that can realize good convergence and raster.

  The present invention has been made to solve the above-described problems of the prior art, and provides a color picture tube apparatus capable of realizing good convergence and raster while sufficiently exhibiting the power saving effect. With the goal.

  The color picture tube device according to the present invention includes an envelope including a front panel and a funnel, an electron gun provided in a neck portion of the funnel, and three electron beams emitted inline from the electron gun. And a deflection yoke for deflecting in the horizontal and vertical directions by applying a horizontal deflection magnetic field and a vertical deflection magnetic field. The deflection yoke includes a ferrite core, a horizontal deflection coil that generates the horizontal deflection magnetic field, a vertical deflection coil that generates the vertical deflection magnetic field, and an insulating frame that insulates the horizontal deflection coil and the vertical deflection coil. When the tube axis is the Z axis, the horizontal axis orthogonal to the Z axis is the X axis, and the vertical axis orthogonal to the Z axis and the X axis is the Y axis, the horizontal deflection coil includes the Y axis and the There is a window portion where no winding exists at a position intersecting the YZ plane including the Z axis. The deflection yoke includes at least one cross section perpendicular to the Z axis that satisfies the following A to C.

  A. In the cross section, a plurality of magnetic protrusions protruding toward the Z axis are provided in the vicinity of the position of the inner surface of the ferrite core where the Y axis intersects.

B. In the cross section, when the minimum value of the distance between each said funnel of said plurality of magnetic protrusions and D _1, between the ferrite core and the funnel excluding the plurality of magnetic convex portions Is greater than the distance D ₁ at any location of the ferrite core.

  C. A part of the vertical deflection coil is wound around a groove between the plurality of magnetic convex portions.

  According to the color picture tube device of the present invention, it is possible to provide a color picture tube device which has a sufficient power saving effect and has excellent convergence and raster and capable of excellent image display.

  In the color picture tube device of the present invention described above, it is preferable that the plurality of magnetic projections are provided within a range of ± 30 ° from the Y axis with respect to the Z axis in the cross section. Thereby, since the magnetic resistance of the horizontal deflection magnetic field can be reduced, the horizontal deflection power can be further reduced.

  The vertical deflection coil has a toroidal type at a portion wound around the groove, but is preferably a saddle type at other portions. Thereby, a coil can be separately created according to the winding position of the winding. In particular, it is preferable that the saddle type portion is a die-wound coil wound using a die because the productivity is good and the winding position accuracy and the degree of freedom in winding arrangement are improved.

  Moreover, it is preferable that the horizontal deflection coil is a mold winding coil wound using a mold. Thereby, the productivity of the horizontal deflection coil is improved, and the winding position accuracy and the degree of freedom of the winding arrangement are improved.

  In the cross section, it is preferable that the insulating frame includes an insulating frame convex portion protruding toward the window portion in a region facing the plurality of magnetic convex portions. Thereby, the insulation between the horizontal deflection coil and the vertical deflection coil can be easily ensured, and the deflection power can be reduced by bringing the plurality of magnetic projections closer to the funnel.

  In this case, it is preferable that the insulating frame convex portion is inserted into the window portion of the horizontal deflection coil. Thereby, since a some magnetic body convex part can be made to approach a funnel, deflection electric power can further be reduced.

  In the color picture tube device of the present invention, it is preferable that the plurality of magnetic convex portions penetrate into the window portion of the horizontal deflection coil in the cross section. Thereby, since a magnetic body convex part can be made to approach a funnel, deflection electric power can further be reduced.

  Moreover, it is preferable that the said vertical deflection | deviation coil is a toroidal type in the part wound by the said groove | channel, and a part other than this. As a result, a vertical deflection coil can be formed by continuously winding a single winding around a ferrite core, so that the vertical deflection coil can be easily formed.

  A plurality of second protrusions protruding toward the Z axis in a region other than a region of the inner surface of the ferrite core facing the window portion of the horizontal deflection coil in the cross section; It is preferable that a part of the vertical deflection coil is wound around the second groove between the second convex portions. By providing the second convex portion, the deflection power can be further reduced.

In this case, it is preferable that D ₁ <D _2, where D ₂ is a distance between the second convex portion and the funnel. Thereby, the magnetic resistance of the horizontal deflection magnetic field can be further reduced.

  It is preferable that the said insulating frame convex part consists of components different from the components which comprise the said other insulating frame. Thereby, the moldability of an insulating frame improves.

  When the dimension along the Z-axis of the ferrite core is L, the electron gun side end of the ferrite core and a position separated by (2/3) × L from the electron gun side end to the front panel side It is preferable that the said cross section exists between these. A larger power saving effect can be obtained by providing a magnetic convex portion satisfying the above A to C in a small diameter region where the distance to the electron beam is small.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to numerical examples (hereinafter referred to as “examples”) applied to a color picture tube apparatus having a diagonal size of 36 inches. However, the following embodiments and numerical examples are merely examples, and the present invention is not limited to these.

(Embodiment 1)
FIG. 1 is an external view of a color picture tube apparatus having a flat screen to which the present invention is applied. For convenience of the following explanation, the tube axis is the Z axis, the horizontal direction (the long side direction of the screen) axis perpendicular to the Z axis is the X axis, and the vertical direction (the short side direction of the screen) axis is perpendicular to the Z axis. The Y axis is assumed. The X axis and the Y axis intersect on the Z axis.

  The color picture tube (CRT) includes an envelope composed of a front flat panel 1 having a phosphor screen (not shown) formed on the inner surface and a funnel 2, and an electron gun 3 provided in a neck portion of the funnel 2. Prepare. The color picture tube device includes the color picture tube and a deflection yoke 4 and a convergence yoke 5 mounted on the outer peripheral surface of the funnel 2. The electron gun 3 includes three cathodes arranged in-line in the X-axis direction, and in-line three electron beams corresponding to three colors of red (R), green (G), and blue (B). Radiate.

  FIG. 2 is an external perspective view of the deflection yoke 4 as viewed from the screen side. FIG. 3 is a partial cross-sectional view taken along a plane perpendicular to the Z axis at a position including the ferrite core 40 of the deflection yoke 4. Since the sectional shape of the deflection yoke 4 is symmetrical with respect to the XZ plane, only the upper half is shown in FIG.

  The deflection yoke 4 includes a ferrite core 40, a saddle-type horizontal deflection coil 20 that emits a horizontal deflection magnetic field for deflecting the electron beam in the horizontal direction, and a vertical that emits a vertical deflection magnetic field for deflecting the electron beam in the vertical direction. It has the deflection coils 30 and 32 and the resin-made insulating frame 10 that insulates the horizontal deflection coil 20 and the vertical deflection coils 30 and 32. In the embodiment, the length L in the Z-axis direction of the ferrite core 40 is 48 mm.

  The saddle type horizontal deflection coil 20 is a mold winding coil manufactured by winding a winding into a predetermined shape using a mold having a predetermined shape, and this is mounted on the insulating frame 10. However, this invention is not limited to this, For example, you may wind the coil | winding using the unevenness | corrugation (for example, bowl-shaped groove | channel) formed in the insulating frame 10. However, a die-wound coil is preferable because it is more productive and improves the winding position accuracy and the degree of freedom in winding arrangement.

  The first vertical deflection coil 30 is a saddle type coil manufactured by forming a winding into a predetermined shape using a mold having a predetermined shape. The second vertical deflection coil 32 is a toroidal coil formed by winding a winding around the ferrite core 40.

  As shown in FIG. 2, when the deflection yoke 4 is viewed from the screen side, a pair of upper and lower horizontal coils 20 arranged symmetrically with the XZ plane sandwiched inside the insulating frame 10 can be seen. The winding arrangement of the upper and lower horizontal deflection coils 20 is substantially symmetric with respect to the YZ plane, and an opening 22 where no winding of the horizontal coil 20 exists is formed at a position where the YZ plane intersects. In the present invention, this opening is called a “window” of the horizontal deflection coil. A convex portion (insulating frame convex portion) 12 of the insulating frame 10 projects toward the window portion 22.

  As shown in FIG. 3, in the vicinity of the position where the Y-axis of the inner surface of the ferrite core 40 intersects, a plurality of magnetic projections 42 protruding toward the window portion 22 of the horizontal deflection coil 20 are present in the ferrite core 40. And is integrally formed. When the magnetic convex portion 42 protrudes toward the Z axis in the vicinity of the Y axis, the magnetic resistance along the Y axis, that is, the magnetic resistance of the horizontal deflection magnetic field is reduced, and the deflection power can be reduced. In the Z-axis direction, the plurality of magnetic projections 42 extend over the entire length of the ferrite core 40 (48 mm in the embodiment).

  The plurality of magnetic projections 42 are provided in the vicinity of the Y axis. More specifically, the plurality of magnetic protrusions 42 are preferably provided within a range of ± 30 ° from the Y axis with respect to the Z axis. The angle from the Y axis with respect to the Z axis of the magnetic convex portion 42 is defined by the center position in the circumferential direction centering on the Z axis of the top surface of the magnetic convex portion 42 facing the Z axis.

  The region of the insulating frame 10 facing the magnetic convex portions 42 is recessed so as to avoid interference with the magnetic convex portions 42, and as a result, the insulating frame 10 protrudes toward the window portion 22. An insulating frame convex portion 12 is formed. Thereby, the front-end | tip of the Z-axis side of the some magnetic body convex part 42 can be made to approach the funnel 2. FIG. If only to avoid interference with the plurality of magnetic projections 42, an opening may be provided in a region of the insulating frame 10 that faces the plurality of magnetic projections 42. However, in the present invention, it is preferable to provide the insulating frame convex portion 12 by deforming the insulating frame 10 instead of opening. By providing the insulating frame convex portion 12, it becomes easy to ensure insulation between the horizontal deflection coil 20 and the vertical deflection coils 30 and 32.

  From the viewpoint of reducing the deflection power, it is preferable that the tip of the magnetic convex portion 42 on the Z-axis side be as close to the funnel 2 as possible. For this purpose, it is preferable that the insulating frame convex portion 12 is inserted into the window portion 22 of the horizontal deflection coil 20 as shown in FIG. It is preferable that it penetrates.

The distance between the ferrite core 40 and the funnel 2 is minimum at the magnetic convex portion 42. That is, when the distance between the magnetic convex portion 42 and the funnel 2, D _1, the distance between the portion and a funnel 2 of the ferrite core 40 except for the magnetic convex portion 42, the distance at any point D greater than _one. Thereby, the magnetic resistance of the horizontal deflection magnetic field can be further reduced. Note that the distances between the plurality of magnetic projections 42 and the funnel 2 need not all be the same. If they are different, the distance D ₁ is defined for the magnetic convex portion 42 closest to the funnel 2.

In the embodiment, in order to ensure insulation between the horizontal deflection coil 20 and the vertical deflection coils 30 and 32, an insulating frame having a thickness of 1 mm is provided between the tip of the magnetic convex portion 42 on the Z-axis side and the funnel 2. Protrusions 12 were provided. The distance between the insulating frame convex portion 12 and the tip of the magnetic material convex portion 42 on the Z-axis side was 0.2 mm, and the distance between the insulating frame convex portion 12 and the funnel 2 was 0.5 mm. Therefore, the distance D ₁ between the tip of the magnetic convex portion 42 on the Z-axis side and the outer surface of the funnel 2 is 1.7 mm.

  Of course, if insulation between the horizontal deflection coil 20 and the vertical deflection coils 30 and 32 can be secured, an opening is provided in the insulating frame convex portion 12 or in the region without the insulating frame convex portion 12 being provided. An opening may be provided, and a part or all of the plurality of magnetic projections 42 may be opposed to the funnel 2 through the opening. In this way, the tip of the magnetic convex portion 42 on the Z-axis side can be made closer to the funnel 2, so that the deflection power can be further reduced.

The plurality of magnetic projections 42 are extended in a bowl shape substantially parallel to the YZ plane. In the example of FIG. 3, one magnetic convex portion 42 is formed on each side of the magnetic convex portion 42 along the central YZ plane. As a result, two grooves 45 are formed between the adjacent magnetic projections 42. In the embodiment, the width W ₄₂ of each magnetic projection ₄₂ is 2 mm, and the width W ₄₅ of the groove 45 between adjacent magnetic projections 42 is 3 mm. Accordingly, the outer dimension W of the magnetic convex portions 42 on both outer sides is set to 12 mm.

  A toroidal second vertical deflection coil 32 is formed in which a winding is wound around the groove 45 and the outer surface of the ferrite core 40 opposite to the groove 45 to generate a vertical deflection magnetic field. The second vertical deflection coil 32 is connected in series with a second vertical deflection coil (not shown) disposed at a symmetrical position with respect to the XZ plane, and further connected in series with a saddle-type first vertical deflection coil 30, so that it is vertical as a whole. A vertical deflection coil for generating a deflection magnetic field is formed.

  In the present invention, since a part of the vertical deflection coil is disposed as the second vertical deflection coil 32 in the groove 45 between the plurality of bowl-shaped magnetic projections 42, only the magnetic field generated by the first vertical deflection coil 30 is used. The fact that the vertical deflection magnetic field becomes conspicuous will act so that the magnetic field generated by the second vertical deflection coil 32 is weakened. As a result, an optimum barrel magnetic field that can realize good convergence and raster can be easily formed.

  For example, in the example, the upper and lower raster inner pincushion distortion occurred 0.7 mm on the average on the upper and lower sides, and misconvergence called S1 on the periphery of the screen occurred 0.4 mm on the average for the four corners.

On the other hand, as shown in FIG. 7, the magnetic projection 104a has a width W ₀ of 12 mm, the groove 45 is not formed, and therefore the second vertical deflection coil 32 is not formed. In the conventional color picture tube apparatus similar to the above embodiment, the inner pincushion distortion of the upper and lower rasters as shown in FIG. 8 occurs 1.5 mm on the upper and lower averages, and misconvergence called S1 around the screen is generated. An average of 1.0 mm was generated at the four corners.

As described above, in the conventional color picture tube device, the vertical deflection coil 103 cannot be disposed in the portion where the magnetic projection 104a having the width W ₀ is formed. Therefore, the vertical deflection disposed on both sides with respect to the YZ plane. resulting in a spaced apart coil 103 by a distance W _0. As a result, the barrel field of the vertical deflection magnetic field is emphasized more than necessary, so that misconvergence and raster distortion are deteriorated.

In the present invention, even if the separation distance W of the first vertical deflection coils 30 arranged on both sides with respect to the YZ plane is the same as the conventional separation distance W ₀ , a plurality of magnetic material protrusions are formed in the region of the width W. By forming a portion 42 and disposing a part of the vertical deflection coil (second vertical deflection coil 32) in the groove 45 between them, good convergence and raster characteristics are realized without impairing the power saving effect. be able to.

  The magnetic convex portion 42 may be integrally formed with the ferrite core 40, or may be manufactured separately from the ferrite core 40 main body and attached to the inner surface of the ferrite core 40.

(Embodiment 2)
FIG. 4 is a partial cross-sectional view of the deflection yoke 4 attached to the color picture tube device according to Embodiment 2 of the present invention. Since the sectional shape of the deflection yoke 4 is symmetrical with respect to the XZ plane, only the upper half of the XZ plane is shown in the same manner as in FIG.

  The second embodiment is different from the first embodiment in the following points. That is, the vertical deflection coil according to the first embodiment includes a toroidal second vertical deflection coil 32 wound around the groove 45 and a saddle-type first vertical deflection coil 30 wound around other portions. In contrast, in the vertical deflection coil 35 of the second embodiment, the winding is wound in a toroidal shape at all portions. As a result, the toroidal vertical deflection coil 35 can be formed by continuously winding one winding around the ferrite core 40 at the groove 45 and other portions, so that the vertical deflection coil 35 is formed. Work becomes easy.

  The second embodiment is the same as the first embodiment except for the above, and has the same effects as the first embodiment.

(Embodiment 3)
FIG. 5 is a partial cross-sectional view of the deflection yoke 4 attached to the color picture tube apparatus according to Embodiment 3 of the present invention. Since the sectional shape of the deflection yoke 4 is symmetric with respect to the XZ plane, only the upper half of the XZ plane is shown in the same manner as in FIGS.

  The third embodiment will be described focusing on the differences from the second embodiment.

  In the third embodiment, a plurality of bowl-shaped second convex portions 47 projecting toward the insulating frame are formed in regions other than the region facing the window portion 22 of the horizontal deflection coil 20 on the inner surface of the ferrite core 40. Has been. In the Z-axis direction, the second convex portion 47 extends to both ends of the ferrite core 40 in the Z-axis direction substantially along the plane including the Z-axis. Such a ferrite core provided with the second protrusions 47 is generally called a slot core.

  The winding of the vertical deflection coil 35 is wound in a toroidal shape in the second groove 49 between the second convex portions 47 adjacent in the circumferential direction. Accordingly, as in the second embodiment, a toroidal vertical deflection coil 35 is formed by continuously winding one winding around the ferrite core 40 in the second groove 49 and the groove (first groove) 45. Therefore, the forming operation of the vertical deflection coil 35 is facilitated.

  By forming the second convex portion 47, the ferrite core 40 can be brought close to the funnel 2, so that the deflection efficiency can be improved and the power consumption can be reduced.

  5 shows an example in which the winding is wound in the toroidal type in the second groove 49 and the groove 45, but the winding is saddle type in one or both of the second groove 49 and the groove 45. Winding is also possible.

  5 shows an example in which the second convex portion 47 is not provided in the vicinity of the X axis, but the second convex portion 47 may be provided in the vicinity of the X axis from the viewpoint of reducing the deflection power.

From the viewpoint of reducing the deflection power, it is preferable that the tip of the second convex portion 47 on the Z-axis side be as close to the funnel 2 as possible. However, there is a limit because the horizontal deflection coil 20 exists between the second convex portion 47 and the funnel 2, unlike the magnetic convex portion 42 protruding toward the window portion 22 of the horizontal deflection coil 20. That is, when the distance between the tip of the magnetic convex portion 42 on the Z-axis side and the funnel 2 is D ₁ , and the distance between the tip of the second convex portion 47 on the Z-axis side and the funnel 2 is D _2. , D ₂ > D ₁ .

In the above embodiment, D ₁ = 1.7 mm. Since only the insulating frame 10 exists between the magnetic convex portion 42 and the funnel 2, generally, the thickness of the insulating frame 10 is 0.8 to 1.2 mm, and the magnetic convex portion 42 and the insulating frame 10 are If the gap between them is 0.2 mm, and the gap between the insulating frame 10 and the funnel 2 is 0.5 mm, the distance D ₁ can be 1.9 mm or less.

On the other hand, since the horizontal deflection coil 20 further exists between the second convex portion 47 and the funnel 2, the minimum thickness of the horizontal deflection coil 20 is 0.4 mm, and the thickness of the insulating frame 10 is 0.8 to 1.2 mm. When the gap between the magnetic convex portion 42 and the insulating frame 10 is 0.2 mm and the gap between the insulating frame 10 and the funnel 2 is 0.5 mm, the distance D ₂ is 1.9 mm or more.

As shown in FIG. 5, in the case where the plurality of magnetic convex portions 42 and the plurality of second convex portions 47 are provided, when the distances between the tips on the Z-axis side and the funnel 2 are different from each other, the distance D ₁ , D ₂ are defined as follows: The distance D ₁ is the minimum value among the distances between the plurality of convex portions existing in the range of ± 30 ° from the Y axis with respect to the Z axis and the funnel 2 in the XY cross section. The distance D ₂ is the minimum value of the distances between the funnels 2 and each of the plurality of convex portions existing in a range exceeding ± 30 ° from the Y axis with respect to the Z axis in the XY cross section.

(Embodiment 4)
FIG. 6A is a partial cross-sectional view of the deflection yoke 4 attached to the color picture tube device according to Embodiment 4 of the present invention. Since the sectional shape of the deflection yoke 4 is symmetrical with respect to the XZ plane, only the upper half of the XZ plane is shown in the same manner as in FIGS. FIG. 6B is an enlarged cross-sectional view of a portion 6B of FIG.

  The fourth embodiment will be described focusing on the differences from the first embodiment.

  In the fourth embodiment, the insulating frame 10 is composed of at least two parts: a first part 10 a that forms the insulating frame convex part 12 and a second part 10 b that forms a part other than the insulating frame convex part 12.

  Generally, the substantially funnel-shaped insulating frame 10 is obtained, for example, by resin-molding two semi-funnel-shaped parts divided on the XZ plane and joining them. In order to resin-mold a semi-funnel-shaped part having the insulating frame convex part 12 at once using a mold, it is necessary to combine three or more mold parts in consideration of the detachability of the molded product from the mold. Yes, the molding cost increases.

  The insulating frame 10 of the present embodiment is a combination of a first component 10a and a second component 10b that are separately molded with resin. As a result, both the first component 10a and the second component 10b can be molded using two mold components, so that productivity can be improved as a whole and costs can be reduced.

  When the first part 10a and the second part 10b are separate parts for the insulating frame 10, the insulation between the horizontal deflection coil 20 and the vertical deflection coils 30 and 32 disposed on both sides of the insulating frame 10 is reduced. There is a fear. Therefore, in the present embodiment, as shown in FIG. 6B, the joint between the first component 10a and the second component 10b has a stepped shape having a joint surface 10c along the circumferential direction. Thereby, the extended surface distance between the horizontal deflection coil 20 and the vertical deflection coils 30 and 32 is ensured, and the deterioration of insulation is prevented.

  In the second and third embodiments, the insulating frame 10 in which the first component 10a and the second component 10b described above are combined can be used.

  In the first to fourth embodiments, the magnetic convex portion 42 is provided over the entire length L of the ferrite core 40 in the Z-axis direction. In the third embodiment, the second convex portion 47 is also provided over the entire length L of the ferrite core 40 in the Z-axis direction. However, the magnetic convex portion 42 and / or the second convex portion 47 of the present invention are not limited to this, and may be provided only on a part of the entire length L of the ferrite core 40.

  The deflection yoke 4 of the present invention preferably has the cross section shown in FIG. 3, FIG. 4, FIG. 5 or FIG. 6A described above at any one point on the Z axis. More precisely, the following A to C are satisfied in a cross section orthogonal to the Z axis at at least one point on the Z axis.

  A. In the vicinity of the position of the inner surface of the ferrite core 40 where the Y-axis intersects, a plurality of magnetic projections 42 protruding toward the Z-axis are provided.

B. When the minimum value of the distance between each and a funnel 2 of a plurality of magnetic convex portions 42 and D _1, the distance between the ferrite core 40 and a funnel 2, except the plurality of magnetic convex portions 42 are ferrite It is larger than the distance D ₁ at any location of the core 40.

  C. A part 32 of the vertical deflection coil is wound around the groove 45 between the plurality of magnetic body convex portions 42.

  The position in the Z-axis direction of this cross section is not particularly limited, but when the dimension in the Z-axis direction of the ferrite core 40 is L, the electron gun 3 side end of the ferrite core 40 and the electron gun 3 side end to the front panel 1 side It is preferable that the cross section exists between a position separated by (2/3) × L. In the region near the electron gun side end, which is the smaller diameter side of the ferrite core 40, the distance between the ferrite core 40 and the electron beam is small, and therefore the magnetic projection 42 (preferably, the second projection 47 is further provided in this region. ), The distance between the ferrite core 40 and the electron beam can be greatly reduced, so that a large deflection power reduction effect can be obtained. Further, if the magnetic convex portion 42 and the second convex portion 47 are not provided on the large diameter side, the degree of freedom in arranging the windings of the vertical deflection coil is improved.

  The field of application of the color picture tube apparatus of the present invention is not particularly limited, and can be widely used for televisions, computer displays, and the like.

1 is an external view of a color picture tube apparatus according to an embodiment of the present invention. It is the perspective view seen from the screen side of the deflection | deviation yoke with which the color picture tube apparatus which concerns on one Embodiment of this invention is mounted | worn. It is a partial cross section figure of the deflection | deviation yoke with which the color picture tube apparatus which concerns on Embodiment 1 of this invention is mounted | worn. It is a partial cross section figure of the deflection | deviation yoke with which the color picture tube apparatus concerning Embodiment 2 of this invention is mounted | worn. It is a partial cross section figure of the deflection | deviation yoke with which the color picture tube apparatus concerning Embodiment 3 of this invention is mounted | worn. 6A is a partial cross-sectional view of a deflection yoke mounted on a color picture tube device according to Embodiment 4 of the present invention, and FIG. 6B is an enlarged cross-sectional view of a portion 6B of FIG. 6A. is there. It is a partial sectional view of a conventional deflection yoke. It is the figure which showed the example of the inner pincushion distortion of the upper and lower raster in the conventional color picture tube apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front panel 2 Funnel 3 Electron gun 4 Deflection yoke 5 Convergence yoke 10 Insulation frame 12 Insulation frame convex part 20 Horizontal deflection coil 22 Window part 30 First vertical deflection coil 32 Second vertical deflection coil 35 Vertical deflection coil 40 Ferrite core 42 Magnetic Body convex part 45 Groove 47 Second convex part 49 Second groove

Claims (10)

An envelope consisting of a front panel and a funnel;
An electron gun provided in the neck of the funnel;
A color picture tube device comprising: a deflection yoke that causes a horizontal deflection field and a vertical deflection field to act on three electron beams emitted in-line from the electron gun to deflect the electron beam in a horizontal direction and a vertical direction,
The deflection yoke includes a ferrite core, a horizontal deflection coil that generates the horizontal deflection magnetic field, a vertical deflection coil that generates the vertical deflection magnetic field, and an insulating frame that insulates the horizontal deflection coil and the vertical deflection coil. ,
When the tube axis is the Z axis, the horizontal axis orthogonal to the Z axis is the X axis, and the vertical axis orthogonal to the Z axis and the X axis is the Y axis, the horizontal deflection coil includes the Y axis and the A window portion where no winding exists at a position intersecting the YZ plane including the Z axis;
The color picture tube apparatus, wherein the deflection yoke includes at least one cross section perpendicular to the Z axis that satisfies the following A to C:
A. In the cross section, a plurality of magnetic protrusions protruding toward the Z axis are provided in the vicinity of the position of the inner surface of the ferrite core where the Y axis intersects.
B. In the cross section, when the minimum value of the distance between each said funnel of said plurality of magnetic protrusions and D _1, between the ferrite core and the funnel excluding the plurality of magnetic convex portions Is greater than the distance D ₁ at any location of the ferrite core.
C. The vertical deflection coil is wound in a toroidal shape in the groove between the plurality of magnetic material convex portions, and is wound in a saddle shape in a portion other than the groove between the plurality of magnetic material convex portions .   2. The color picture tube device according to claim 1, wherein in the cross section, the plurality of magnetic projections are provided within a range of ± 30 ° from the Y axis with respect to the Z axis.   2. The color picture tube apparatus according to claim 1, wherein the horizontal deflection coil is a mold winding coil wound using a mold.   2. The color picture tube device according to claim 1, wherein, in the cross section, the insulating frame includes an insulating frame convex portion protruding toward the window portion in a region facing the plurality of magnetic material convex portions. The color picture tube device according to claim 4 , wherein the insulating frame convex portion is inserted into the window portion of the horizontal deflection coil.   2. The color picture tube device according to claim 1, wherein, in the cross section, the plurality of magnetic convex portions are inserted into the window portion of the horizontal deflection coil. 3.   In the cross section, the inner surface of the ferrite core has a plurality of second protrusions protruding toward the Z-axis in a region other than a region facing the window portion of the horizontal deflection coil, The color picture tube device according to claim 1, wherein a part of the vertical deflection coil is wound around a second groove between the two convex portions. The color picture tube device according to claim 7 , wherein D ₁ <D ₂ where D ₂ is a distance between the second convex portion and the funnel. The color picture tube device according to claim 4 , wherein the insulating frame convex portion is made of a component separate from other components constituting the insulating frame.   When the dimension along the Z-axis of the ferrite core is L, the electron gun side end of the ferrite core and a position separated by (2/3) × L from the electron gun side end to the front panel side The color picture tube device according to claim 1, wherein the cross section exists between the two.

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