KR20030092343A - Deflection yoke for cathode ray tube - Google Patents

Abstract

PURPOSE: A deflection yoke is provided to improve the efficiency of deflection by inserting a ferrite member between vertical deflection coils and into a space portion of an inner circumference of a ferrite core. CONSTITUTION: A deflection yoke includes a horizontal deflection coil, a vertical deflection coil(42), a ferrite core, a fixing portion(44), a holder(43), and a ferrite member(47). The horizontal deflection coil and the vertical deflection coil(42) are used for deflecting horizontally or vertically election beams. The ferrite core is installed at the outside of the vertical deflection coil(42) to reduce the loss of the magnetic force. A fixing portion(44) is formed at the holder(43) to fix the horizontal deflection coil, the vertical deflection coil(42), and the ferrite core. The ferrite member(47) is inserted between the vertical deflection coils(42) and into a space portion of an inner circumference of the ferrite core.

Description

Deflection yoke for cathode ray tube {DEFLECTION YOKE FOR CATHODE RAY TUBE}

The present invention relates to a deflection yoke for a cathode ray tube, and more particularly to a deflection yoke capable of improving the vertical deflection sensitivity.

In general, the deflection yoke is a device for deflecting the electron beam of the cathode ray tube toward the screen and is mounted on the funnel neck of the cathode ray tube to deflect the electron beam up, down, left and right by a magnetic field generated by applying a square wave current to the horizontal and vertical coils. . The deflection yoke is applied with a self-converging type using a non-uniform magnetic field to converge three electron beams of red (R), green (G), and blue (B) to any point on the fluorescent surface. It is becoming.

First, the deflection yoke provided in the cathode ray tube and the cathode ray tube of the prior art will be described with reference to FIG. 1.

Cathode ray tube according to the prior art is a funnel (10) of the funnel forming the outside of the cathode ray tube, a panel 20 is installed on the front side of the funnel 10 and the phosphor is coated on the rear surface, and the panel 20 And an electron gun 30 positioned at an opposite end of the panel to emit an electron beam, and mounted on an outer periphery of the neck portion of the funnel 10 so as to deflect the electron beam to be appropriately scanned to the area of the phosphor of the panel 20. It is composed of a deflection yoke 40 and a shadow mask 60 installed at the rear of the panel 20 to perform color selection of the electron beam.

The deflection yoke 40 will be described in more detail with reference to FIGS. 2 and 3 and 4 and 5 as follows.

2 is a schematic view showing a deflection yoke provided in the cathode ray tube according to the prior art, Figure 3 is a perspective view showing a ferrite core according to the prior art, Figure 4 is a holder provided in the deflection yoke according to the prior art 5 is a perspective view illustrating a state in which a vertical deflection coil is fixed to a holder provided in a deflection yoke according to the related art.

As shown in FIG. 2, the deflection yoke according to the related art has a vertical deflection coil 42 for deflecting the electron beam emitted from the electron gun 30 in the cathode ray tube in the vertical direction, and the electron beam in the horizontal direction. The horizontal deflection coil 41 for deflecting and the ferrite core 46 to reduce the magnetic force generated by the current flowing through the vertical deflection coil 42 and the horizontal deflection coil 41 to improve the deflection efficiency. ), The holder 43 for mechanically fixing the relative position of the vertical deflection coil 42, the horizontal deflection coil 41 and the ferrite core 46, and the horizontal deflection coil 41 It is composed of a magnet 49 installed on the front side to correct raster distortion on the screen.

As shown in FIG. 3, the ferrite core 46 includes an opening portion 46a having a wide cross-sectional area, a neck portion 46b having a smaller area than the opening portion 46a, and the neck portion 46a. It consists of the intermediate part 46c which is an intermediate area | region of the opening part 46b.

The holder 43 has the horizontal deflection coil 41 fixed to the inside, the vertical deflection coil 42 is fixed to the outside. In addition, the horizontal deflection coil 41 and the vertical deflection coil 42 may be formed of an insulating material to insulate each other.

In addition, as shown in Figure 4, the fixing portion 44 for fixing the vertical deflection coil 42 is formed on the outer peripheral surface of the holder 43, a predetermined space is formed by the fixing portion 44 The ferrite core 46 is fixed in the outer circumferential direction of the holder 43.

The fixing parts 44 are formed in plural in the circumferential direction of the holder 43 at predetermined intervals, and the circumferential distance between the fixing parts 44 is determined according to the width of the vertical deflection coil 42. As shown in FIG. 5, the vertical deflection coil 42 is positioned between the fixing parts 44.

In addition, the fixing portion 44 is formed at a predetermined interval toward the longitudinal direction of the holder 43, the space portion 44a is formed of the empty space between the longitudinal direction of the fixing portion 44 is formed. That is, the vertical deflection coil 42 is fixed between the fixing parts 44, and a space 44a, which is an empty space, is formed between the vertical deflection coils 42.

Referring to the operation of the deflection yoke according to the prior art configured as described above are as follows.

The horizontal deflection coil 41 and the vertical deflection coil 42 adjust the distribution of the windings so that the magnetic field becomes a Barrel or Pin Cushion magnetic field for each part, so that three electron beams are positioned according to the position. By receiving different deflection forces, three electron beams of different distances from the starting point to the arrival point are collected at the same point.

On the other hand, when the current is applied to the horizontal deflection coil 41 and the vertical deflection coil 42 as described above to create a magnetic field, only the magnetic field by the horizontal deflection coil 41 and the vertical deflection coil 42, the electron beam Since it is difficult to deflect over the entire surface of the screen, the high permeability ferrite core 46 is used to minimize the loss on the return path of the magnetic field, thereby increasing the magnetic field efficiency and increasing the magnetic force.

Therefore, the larger the size of the ferrite core 46 or the closer to the vertical deflection coil 42, the shorter the return time of the generated magnetic field can improve the deflection sensitivity of the electron beam.

However, if the size of the ferrite core 46 is increased in order to improve the deflection feeling of the electron beam as described above, the manufacturing cost is increased and the overall configuration of the deflection yoke is limited.

The present invention has been made to solve the above problems of the prior art, by inserting a ferrite member made of the same material as the ferrite core between the vertical deflection coil fixed to the outer surface of the holder in the ferrite core, the ferrite member It is to provide a deflection yoke that can improve the deflection sensitivity by making the force of the magnetic field generated in the deflection more involved.

1 is a schematic view showing a cathode ray tube according to the prior art.

Figure 2 is a schematic diagram showing a deflection yoke provided in the cathode ray tube according to the prior art.

3 is a perspective view showing a ferrite core provided in the deflection yoke according to the prior art.

4 is a perspective view showing a holder provided in the deflection yoke according to the prior art.

5 is a perspective view illustrating a state in which a vertical deflection coil is fixed to a holder provided in a deflection yoke according to the related art.

6 is a perspective view illustrating a state in which a vertical deflection coil is fixed to a holder provided in a deflection yoke according to an embodiment of the present invention.

FIG. 7 is a sectional view taken along line VII-VII.

8 is a partial perspective view illustrating a deflection yoke and a vertical deflection coil according to another embodiment of the present invention.

** Description of the symbols for the main parts of the drawings **

10: Funnel 20: Panel

30: electron gun 40: deflection yoke

60: shadow mask 41: horizontal deflection coil

42: vertical deflection coil 43: holder

46, 50: ferrite core 47: ferrite member

49: magnet

The deflection yoke of the present invention for realizing the above object is a horizontal deflection coil and a vertical deflection coil formed by deflecting the electron beam in the horizontal and vertical directions, respectively, and the horizontal and vertical deflection coils located outside the vertical deflection coil. A ferrite core for reducing the loss of magnetic force generated by the current flowing through the holder, a holder for fixing the horizontal and vertical deflection coils and the ferrite core and mutually insulating the horizontal and vertical deflection coils, and the vertical fixing to the holder. A deflection yoke is provided, comprising a ferrite member inserted into a space between the deflection coils and the inner circumferential surface of the ferrite core.

Hereinafter, a deflection yoke according to an embodiment of the present invention will be described with reference to FIGS. 6 to 7. The same reference numerals as those of the prior art will be referred to.

6 is a perspective view illustrating a state in which a vertical deflection coil is fixed to a holder provided in a deflection yoke according to an embodiment of the present invention, and FIG. 7 is a sectional view taken along line VII-VII of FIG. 6.

Holder 43 provided in the deflection yoke according to the present invention is located between the vertical deflection coil 42 and the horizontal deflection coil 43, the vertical deflection coil 42 and the horizontal deflection coil 41 Insulate and secure to each other.

As shown in FIG. 6, the holder 43 has a plurality of fixing portions 44 in a state in which the vertical deflection coil 42 is fixed at predetermined intervals in the circumferential direction and the longitudinal direction of the outer circumferential surface thereof. It protrudes and is formed.

In addition, the ferrite core 46 is fixed to the outer circumferential direction of the holder 43 in a state where a predetermined space is formed by the fixing part 44.

In addition, the vertical deflection coils 42 are fixed between the fixing parts 44 in the circumferential direction, and are formed of empty spaces between the respective vertical deflection coils 42 fixed between the fixing parts 44. The space 44a is formed.

The ferrite member 47 having the same component as the ferrite core 46 is interposed in the space 44a.

In more detail, as shown in FIG. 7, the ferrite member 47 is formed in the form of a hexahedron so that one side thereof is in contact with the outer circumferential surface of the holder 43 and the other side thereof is formed of the ferrite core 46. Corresponds to the inner circumference. In addition, the fixing portion 44 of the holder 43 corresponds to both sides in the longitudinal direction of the ferrite member 47, and the vertical deflection coil 42 is disposed at both sides in the width direction of the ferrite member 47. Corresponding.

Here, the ferrite member 47 is preferably formed so as to match the shape of the space 44a as much as possible, and the predetermined adhesion so that the ferrite member 47 does not move inside the space 44a. It is preferable to adhere to the outer circumferential surface of the holder 43 by means.

Referring to the operation and effect of the deflection yoke according to an embodiment of the present invention configured as described above are as follows.

The horizontal deflection coil 41 and the vertical deflection coil 42 adjust the distribution of the windings so that the magnetic field becomes a barrel or pin cushion magnetic field for each part, so that the three electron beams receive different deflection forces according to their positions. In this case, three electron beams with different distances from the starting point to the arrival point are collected at the same point.

At this time, one of the methods used to improve the vertical deflection sensitivity in the vertical deflection coil 42 uses a method of reducing the distance between the ferrite core 46 and the vertical deflection coil 42, which is the ferrite core 46 This is because the shorter the separation distance between the vertical deflection coil 42 and the curved surface of the vertical deflection coil 42 is, the shorter the feedback time of the magnetic field generated in the vertical deflection coil 42 is.

Therefore, the ferrite member 47 formed of the same material as the ferrite core 46 is located closer to the vertical deflection coil 42, thereby reducing the distance between the electron beam and the electromagnetic field when deflecting the electron beam in the vertical direction. By narrowing the magnetic field of the deflection coil, the ferrite core 46 is magnetized to increase the deflection efficiency by causing the force of the magnetic field to be more involved in deflection.

Referring to Figure 8 describes the configuration and effect of the ferrite core of the deflection yoke according to another embodiment of the present invention.

8 is a partial perspective view showing a deflection yoke and a vertical deflection coil according to another embodiment of the present invention.

As shown, the ferrite core 50 of the deflection yoke according to another embodiment of the present invention is separated in the circumferential direction, and the ferrite core protrusions 51 protrude from the inside of each ferrite core 50.

The ferrite core protrusion 51 protrudes from the middle of the ferrite core 50 so that when the ferrite core 50 and the holder 43 are coupled, the ferrite core protrusion 51 is the holder 43. It is inserted into the space portion 44a formed between the vertical deflection coils 42 fixed to the empty space formed by the fixing portion 44 of the holder 43.

Accordingly, the fixing portions 44 of the holder 43 correspond to both sides in the longitudinal direction of the ferrite core protrusion 51, and the vertical deflection coils 42 both sides in the width direction of the ferrite protrusion 51. Corresponds to.

In the deflection yoke according to another embodiment of the present invention configured as described above, the ferrite core protrusion 51 inserted between the vertical deflection coils 42 is integrally formed with the ferrite core 46, thereby providing the holder 43. ) Can be more easily combined with the effect of solidifying the bond.

As described above, in the deflection yoke according to the present invention, a ferrite member processed with the same component as the ferrite core is inserted into the space formed between the vertical deflection coils and the inner circumferential surface of the ferrite core, so that the electron beam is deflected in the vertical direction. By narrowing the distance between the electron and the electron, the ferrite core is magnetized by the magnetic field of the deflection coil, thereby increasing the force of the magnetic field, thereby improving deflection efficiency.

In addition, since the ferrite core of the deflection yoke according to the present invention is formed integrally with the ferrite protrusion on the vertical deflection coil, it is possible to more easily assemble with the holder and to secure the coupling.

Claims (4)

A horizontal deflection coil and a vertical deflection coil which deflect the electron beam in the horizontal and vertical directions, respectively; A ferrite core positioned outside the vertical deflection coil to reduce a loss of magnetic force generated by currents flowing in the horizontal and vertical deflection coils; A holder having a fixing part for fixing the horizontal and vertical deflection coils and the ferrite core, and insulating the horizontal and vertical deflection coils from each other and fixing the vertical deflection coils to an outer circumferential surface thereof; And a ferrite member inserted into a space formed between the vertical deflection coils fixed to the holder and an inner circumferential surface of the ferrite core. The deflection yoke of claim 1, wherein the ferrite member is formed integrally with the ferrite core. The deflection yoke for cathode ray tubes according to claim 1 or 2, wherein the ferrite member is formed to have the same shape as the space portion. The deflection yoke of claim 1 or 2, wherein the ferrite member is formed of the same material as the ferrite core.