JP2006236929A - Color picture tube device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color picture tube device with a simple structure and equipped with a deflection yoke capable of adjusting winding distribution. <P>SOLUTION: A plurality of protrusion parts 16 protruded to a tube axis side of a cathode-ray tube are formed on an inner surface of a ferrite core 10, along the inner surface of the ferrite core 10 in the tube axis direction. A screen surface side end part of the protrusion parts 16 is nearer to an electron gun side than an end part 12 of the screen surface side of the ferrite core 10, an end part 16b of the protrusion parts 16 at the electron gun side is nearer to the screen surface side than an end part 11 of the ferrite core 10 at the electron gun side. Projections 13, 14 protruded outside the ferrite core 10 are formed at the end part 12 of the screen surface side of the ferrite core 10 and the end part 11 of the electron gun side of the ferrite core 10, and a deflecting coil 8 is regulated of its position by the projections 13, 14 and the protrusion parts 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a color picture tube apparatus used in a television receiver, a computer display, and the like, and more particularly to a structure for winding a deflection yoke.

  A color picture tube apparatus used in a television receiver or the like includes a deflection yoke that deflects an electron beam in the horizontal and vertical directions. The deflection yoke is provided on the outer periphery of a funnel that is a glass tube, and deflects three electron beams emitted from the electron gun vertically and horizontally to scan the phosphor screen. The deflection yoke includes, for example, a saddle type horizontal deflection coil and a toroidal type vertical deflection coil, and the vertical deflection coil is wound around a ferrite core.

  FIG. 5 shows a perspective view of an example of a conventional toroidal type vertical deflection coil. The vertical deflection coil 30 is wound around the ferrite core 31 from the electron gun side end portion 32 to the screen side end portion 33.

  The example shown in FIG. 5 is an example in which the vertical deflection coil 30 is directly wound around the ferrite core 31, but a resin member is attached separately from the ferrite core 31, and the winding arrangement on the electron gun side and the screen side is arranged. There is also proposed a technique for adjusting the magnetic field distribution by setting.

In the configuration described in Patent Document 1, a convex portion and a groove are provided on the inner peripheral surface of the ferrite core 31 to regulate the winding distribution.
No. 7-35289

  However, in the configuration shown in FIG. 5, the vertical deflection coil 30 is only wound so as to wrap around the ferrite core 31, and the arrangement of the windings is limited so that the position and size can be adjusted.

  Further, in the configuration in which the resin member is attached separately from the ferrite core 31, the distribution adjustment of the magnetic field can be performed independently on the electron gun side and the screen side, but the winding flow at the intermediate part is on the electron gun side and the screen side. The winding position is determined, and the magnetic field distribution cannot be adjusted by the middle part alone. In addition, the number of parts increases and the number of assembly steps also increases.

  In the configuration described in Patent Document 1, there is no structure for restricting the arrangement of the vertical deflection coil at the end of the ferrite core, and the winding arrangement is not easy and reliable.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and to provide a color picture tube device including a deflection yoke capable of adjusting a winding distribution with a simple configuration.

  In order to achieve the above object, a color picture tube apparatus according to the present invention includes an envelope composed of a panel having a screen surface formed on the inner surface and a funnel, and an electron gun provided in a neck portion of the funnel. A color picture tube apparatus in which a deflection yoke is provided in a cathode ray tube so as to surround the outside of the funnel, and the deflection yoke includes a ferrite core around which a deflection coil is wound. A plurality of convex portions projecting toward the tube axis side of the cathode ray tube are formed on the inner surface, and the convex portions are formed along the inner surface of the ferrite core in the tube axis direction, The end on the screen surface side is closer to the electron gun than the end on the screen surface side of the ferrite core, and the end on the electron gun side of the convex portion is on the electron gun side of the ferrite core. A protrusion projecting outside the ferrite core is formed on the screen surface end of the ferrite core and on the electron gun side end of the ferrite core. The position of the deflection coil is regulated by the projecting part and the convex part.

  According to the present invention, it is possible to provide a cathode ray tube apparatus including a deflection yoke capable of adjusting a winding distribution with a simple configuration.

  The cathode ray tube device of the present invention provides a cathode ray tube device including a deflection yoke that can adjust the distribution of windings with a simple configuration because the position of the deflection coil can be regulated by the protrusions and protrusions formed on the ferrite core. can do.

  In the color picture tube device, each of the protrusions is disposed on the outer periphery of the ferrule core around the tube axis, and the deflection coil is disposed in a notch formed between the protrusions. It is preferable. According to this configuration, the position of the deflection coil can be easily and reliably regulated.

  Further, it is preferable that the deflection coil has a portion where a bent portion is formed at a position of an end portion of the convex portion on the electron gun side and a position of an end portion of the convex portion on the screen surface side. According to this configuration, in the tube axis direction, the deflection coil in the region adjacent to the convex portion forming region can be disposed so as to spread along the inner surface of the ferrite core, and an arrangement pattern is formed between the convex portion forming region and the adjacent region. Can be different.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view and a partial sectional view of a color picture tube device according to an embodiment of the present invention. The color picture tube apparatus shown in this figure includes a cathode ray tube 1 and a deflection yoke 6. The cathode ray tube 1 includes an envelope and components attached thereto. The envelope includes a front flat panel 2 having a screen surface 2a formed on the inner surface and a funnel 3. An electron gun 5 that emits three electron beams is provided in the neck portion 4 of the funnel 3. A deflection yoke 6 is mounted so as to surround the outside of the funnel 3.

  The screen surface 2a is formed of a phosphor layer, and the phosphor layer is a three-color phosphor layer in the form of dots or stripes that emit blue, green, and red light. A shadow mask 7 is disposed facing the screen surface 2a. A large number of electron beam passage holes are formed in the shadow mask 7.

  The deflection yoke 6 includes a saddle type horizontal deflection coil (not shown) and a toroidal type vertical deflection coil 8 and generates horizontal and vertical deflection magnetic fields. The three electron beams are deflected by the horizontal and vertical deflection magnetic fields, and a color image is displayed by scanning the screen surface 2a horizontally and vertically via the shadow mask 7.

  The horizontal deflection coil is disposed, for example, on the inner side (funnel 3 side) of a resin-made insulating frame 9, and the vertical deflection coil 8 is formed by being wound around a ferrite core 10. The ferrite core 10 around which the vertical deflection coil 8 is wound is disposed so as to cover the outer surface of the insulating frame 9, and the horizontal deflection coil and the vertical deflection coil 8 are insulated by the insulating frame 9.

  FIG. 2 is a perspective view of the ferrite core 10 alone according to the present embodiment. In FIG. 2, the Z axis indicates the tube axis of the cathode ray tube 1, 11 indicates the electron gun side end, and 12 indicates the screen side end. A protruding portion 13 is formed at the electron gun side end portion 11, and a protruding portion 14 is formed at the screen side end portion 12. The protrusions 13 and 14 protrude outside the ferrite core 10, that is, in a direction away from the Z axis. Since the protrusions 13 and 14 are arranged at a predetermined pitch on the outer periphery of the ferrite core 10 around the Z axis, a notch 13a is provided between the protrusions 13 and a notch is provided between the protrusions 14. 14a is formed.

  On the inner surface of the ferrite core 10, a plurality of convex portions 16 are arranged in the circumferential direction around the Z axis, and grooves 17 are formed between the convex portions 16. The convex portion 16 protrudes inside the ferrite core 10, that is, toward the Z-axis side. Each convex portion 16 is formed along the inner surface of the ferrite core 10 from the electron gun side end portion 11 side toward the screen side end portion 12 side in the Z-axis direction.

  The electron gun side end portion 16 b of the convex portion 16 is on the inner side (screen side) than the electron gun side end portion 11 of the ferrite core 10. For this reason, in the inner surface of the ferrite core 10, there is a region where the convex portion 16 indicated by reference numeral 18 is not formed between the electron gun side end portion 16 b and the electron gun side end portion 11. Hereinafter, this region is referred to as an electron gun side inner surface region 18. A region where the convex portion 16 indicated by reference numeral 19 is formed is referred to as an intermediate region 19.

  FIG. 3 is an external perspective view of the ferrite core 10 shown in FIG. 2 with the vertical deflection coil 8 wound thereon. The position of the vertical deflection coil 8 is regulated by the notches 14 a and 13 a and the groove 17. In the electron gun side inner surface region 18, the vertical deflection coil 8 is disposed so as to go from the position of the electron gun side end portion 16 b of the convex portion 16 to the position of the cutout portion 13 a. On the outer surface of the ferrite core 10, the vertical deflection coil 8 is arranged so as to go from the position of the notch 13 a on the electron gun side to the position of the notch 14 a on the screen side.

  FIG. 4 is a perspective view showing the shape of the inner surface side of the ferrite core 10 shown in FIG. This figure shows a state in which the vertical deflection coil 8 is wound. Moreover, in order to show the shape of the inner surface side, a perspective view of a state where a part of the ferrite core 10 is cut and removed is shown.

  The screen side end portion 16 a of the convex portion 16 is on the inner side (electron gun side) than the screen side end portion 12 of the ferrite core 10. For this reason, in the inner surface of the ferrite core 10, there is a region where the convex portion 16 indicated by reference numeral 15 is not formed between the screen side end portion 12 and the screen side end portion 16 a of the convex portion 16. Hereinafter, this region is referred to as a screen-side inner surface region 15.

  The vertical deflection coil 8 is disposed at the positions of the notch 14 a and the groove 17, and the position is regulated by the notch 14 a and the groove 17. Further, in the screen side inner surface region 15, the vertical deflection coil 8 is disposed so as to go from the screen side end portion 16 a of the convex portion 16 toward the notch portion 14 a.

  According to the configuration shown in FIGS. 3 and 4, various arrangement patterns can be set in the vertical deflection coil 8. Specifically, the arrangement pattern in the intermediate region 19 can be determined by selecting the groove 17 in which the vertical deflection coil 8 is arranged. In this case, as shown in the configuration of FIG. 4, by selecting a certain range of grooves 17 and disposing the vertical deflection coils 8 in each of the grooves 17, a portion where the vertical deflection coils 8 are disposed in a concentrated manner. (Part with high arrangement density) can be formed.

  Further, by selecting the notch 13a in which the vertical deflection coil 8 is disposed, the disposition pattern of the electron gun side inner surface region 18 can be determined as shown in FIG. Similarly, by selecting the notch 14a in which the vertical deflection coil 8 is provided, the arrangement pattern in the screen-side inner surface region 15 can be determined as shown in FIG.

  Therefore, the arrangement pattern of the electron gun side inner surface region 18, the intermediate region 19, and the screen side inner surface region 15 can be determined independently by selecting the groove 17 and the notches 13a and 14a. In this case, these arrangement patterns can be different from each other. This is because the positions of the screen side end portion 16a (FIG. 4) and the electron gun side end portion 16b (FIG. 3) of the convex portion 16 are selected by appropriately selecting the notches 13a and 14a in which the vertical deflection coil 8 is disposed. This is because the vertical deflection coil 8 can be formed with a bent portion.

  In the example of FIGS. 3 and 4, the distribution of the vertical deflection coils 18 is dense in the intermediate region 19. On the other hand, in the electron gun side inner surface region 18 and the screen side inner surface region 15, the interval between the windings of the vertical deflection coil 8 is widened along the inner surface of the ferrite core 10 in the Z-axis direction. There is an arrayed part.

  Thus, since the arrangement pattern can be set separately in the three regions, the setting of the magnetic field distribution can be changed from the electron gun side to the screen side. For example, a pincushion distorted magnetic field can be formed in the electron gun side inner surface region 18 and the screen side inner surface region 15, and a strong barrel distorted magnetic field can be formed in the intermediate region 19. According to such a magnetic field distribution, vertical and horizontal raster distortion can be adjusted without using circuit correction, and a high-performance image can be realized with a simple structure.

  Further, since the winding distribution can be controlled by a single ferrite core, it is not necessary to use a resin member separate from the ferrite core or a magnetic body for adjusting the magnetic field distribution. For this reason, it is possible to reduce the number of manufacturing steps by reducing the number of parts, and it is also possible to prevent the generation of a roaring sound caused by mounting separate parts.

  As described above, according to the present invention, it is possible to provide a color picture tube apparatus including a deflection yoke capable of adjusting the winding distribution with a simple configuration. It is useful as a picture tube device.

1 is a side view and a partial cross-sectional view of a color picture tube device according to an embodiment of the present invention. 1 is an external perspective view of a ferrite core according to an embodiment of the present invention. 1 is an external perspective view of a ferrite core around which a vertical deflection coil according to an embodiment of the present invention is wound. The perspective view which shows the shape of the inner surface side of the ferrite core which concerns on one embodiment of this invention. The perspective view of an example of the conventional toroidal type vertical deflection coil.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cathode ray tube 2 Front plane panel 3 Funnel 5 Electron gun 6 Deflection yoke 8 Vertical deflection coil 10 Ferrite core 11 Electron gun side end part of ferrite core 12 Screen side end part 13 and 14 of ferrite core Protrusion part 13a, 14b Notch part 16 Convex portion 15 Screen side inner surface region 18 Electron gun side inner surface region 17 Groove 19 Intermediate region

Claims (3)

A deflection yoke is provided on a cathode ray tube having an envelope composed of a panel having a screen surface formed on the inner surface and a funnel, and an electron gun provided in a neck portion of the funnel so as to surround the outside of the funnel. A color picture tube device provided,
The deflection yoke includes a ferrite core around which a deflection coil is wound,
On the inner surface of the ferrite core, a plurality of convex portions projecting toward the tube axis side of the cathode ray tube are formed, and the convex portions are formed along the inner surface of the ferrite core in the tube axis direction,
The end of the convex portion on the screen surface side is closer to the electron gun than the end of the ferrite core on the screen surface side, and the end of the convex portion on the electron gun side is the end of the ferrite core. Located on the screen surface side from the end on the electron gun side
At the end of the ferrite core on the screen surface side, and at the end of the ferrite core on the electron gun side, a protruding portion that protrudes outside the ferrite core is formed,
A position of the deflection coil is regulated by the projecting portion and the projecting portion.   2. The color picture tube according to claim 1, wherein each of the protrusions is formed on an outer periphery of the ferrite core around the tube axis, and the deflection coil is disposed in a notch formed between the protrusions. apparatus.   The collar according to claim 1 or 2, wherein the deflection coil has a portion where a bent portion is formed at a position of an end portion of the convex portion on the electron gun side and an end portion of the convex portion on the screen surface side. Picture tube device.

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