KR100814867B1 - Deflection apparatus for cathode ray tubes - Google Patents

Abstract

The present invention relates to a cathode ray tube deflection device capable of realizing a high-quality screen by minimizing miss-convergence occurring in the diagonal direction of a screen, wherein at least one of a horizontal deflection coil and a vertical deflection coil has a length having a predetermined length. Wealth; A small diameter connecting portion located at one end of the longitudinal direction portion; A focal length screen including a large-diameter connecting portion located at the other end of the longitudinal part, wherein the longitudinal part is divided into a plurality of sections, and one section is formed to have a different length from the other sections to correspond to the section. To change the curvature of the.

Cathode ray tube, deflection device, misconvergence, deflection coil, longitudinal section, small diameter connector, large diameter connector

Description

Deflection Device for Cathode Ray Tubes {DEFLECTION APPARATUS FOR CATHODE RAY TUBES}

1 is a front view of a deflection device according to the present invention.

2 and 3 are a plan view and a side view of a deflection coil according to the present invention, respectively.

4 is a schematic diagram showing a distance between a focusing point screen and a shadow mask in a direction of a horizontal axis, a vertical axis, and a diagonal axis in a deflection device according to the present invention;

5 and 6 are partially enlarged views of the winding coil for producing a deflection coil according to the present invention;

7 and 8 are respectively a front view and a rear view of a winding coil for producing a deflection coil according to another embodiment of the present invention.

9 is a schematic diagram illustrating a process in which an electron beam is deflected in a uniform magnetic field.

10 is a schematic diagram showing a distance between a focusing point screen and a shadow mask in a horizontal axis, a vertical axis, and a diagonal axis in a deflection device according to the related art;

The present invention relates to a deflection apparatus for a cathode ray tube, and more particularly, to a deflection apparatus for a cathode ray tube that can realize a high quality screen by minimizing miss-convergence occurring in a diagonal direction of a screen.                         

In general, a deflection device for a cathode ray tube is a component that deflects an electron beam by generating horizontal and vertical magnetic fields on an electron beam path so that an electron beam emitted from an electron gun can sequentially scan all pixels of a fluorescent screen. Corresponds to the approximate funnel shape.

A conventional deflection apparatus has a configuration in which horizontal deflection coils and vertical deflection coils are provided inside and outside the separator, respectively, with a separator as an insulator interposed therebetween, and a conical core is installed in association with the vertical deflection coils at the outside of the separator.

9 is a schematic diagram illustrating a process in which an electron beam is deflected by a deflection device that generates a uniform magnetic field. As shown in the figure, in the case of deflecting the electron beam with a uniform magnetic field, in the horizontal axis (x) direction of the screen, three lines of electron beams coincide in the horizontal concentration point screen (1), and in the vertical axis (y) direction of the screen In (3).

Thus, since the three-stem electron beam concentrates inside the shadow mask (not shown) toward the periphery of the screen, the width of the dimension A is in the horizontal axis (x) direction and the width of the dimension B in the vertical axis (y) direction of the screen. The electron beams R and B generate mis-convergence that deviates, thereby significantly impairing the screen quality of the cathode ray tube.

Since the mis-convergence of the electron beam is caused by the shape mismatch between the focused point screen and the shadow mask in each axial direction, the amount of miss-convergence increases as the cathode ray tube screen becomes flat, and the amount of miss-convergence varies depending on the dimensional characteristics of the cathode ray tube screen. do.

FIG. 10 is a diagram showing a horizontal line, a vertical line, and a diagonal line ratio of 4: 3: 5 of a cathode ray tube screen, in which a focused point screen in the horizontal, vertical, and diagonal directions of an electron beam is displayed on the same line (shown as an arc in the drawing). Fig. 1 is a schematic diagram showing the distance between the focus point screen and the shadow mask (S / M) on each axis.

Miss-convergence amounts occurring on the vertical, horizontal, and diagonal axes shown in the drawings are, for example, 1.4 μm, 2.0 μm, and 3.9 μm, and the distance between the focus point screen and the shadow mask (S / M) on each axis is in the vertical axis direction and the horizontal axis. It turns out that it becomes long in order of a direction and a diagonal axis direction, and the miss-convergence amount increases accordingly.

In the above configuration, the miss-convergence amount in the diagonal axis direction is made larger than the miss-convergence amount in the horizontal axis direction plus the miss-convergence amount in the vertical axis direction. In other words,

1.4 (vertical axis) + 2.0 (horizontal axis) <3.9 (diagonal axis)

Therefore, if the non-uniform magnetic field is generated in the horizontal and vertical directions by adjusting the magnetic field generated by the deflection coil, the convergence point screen in the horizontal and vertical directions can be matched with the shadow mask to eliminate mis-convergence in the horizontal and vertical directions. Still, the mis-convergence in the diagonal direction is still around 0.5. In other words,

3.9-(1.4 + 2.0) = 0.5

This is because when the deflection magnetic field is adjusted to match the focus point screen with the shadow mask (S / M), the focusing point screens in the horizontal axis, vertical axis, and diagonal direction are changed in the same way, so it is impossible to adjust only the focusing point screen on a specific axis. This is due to the fact that the main portion of the deflection coils affecting the electron beam is integrally formed such that the longitudinal portion corresponds to both the horizontal axis, the vertical axis, and the diagonal axis of the screen.

Accordingly, an object of the present invention is to solve the above problems, and an object of the present invention is to easily adjust the diagonal focus point screen from the horizontal and vertical focus point screens to minimize the mis-convergence occurring in the diagonal direction of the screen. The present invention provides a deflection device for a cathode ray tube.

Another object of the present invention is to provide a deflection device for a cathode ray tube that can improve the screen quality of the cathode ray tube by minimizing the mis-convergence occurring in the diagonal direction of the screen.

In order to achieve the above object, the present invention,

A separator which is an insulator, a pair of horizontal deflection coils installed inside the separator, a core installed outside the separator, and a pair of vertical deflection coils connected to the core and installed outside the separator, At least one of the horizontal deflection coil and the vertical deflection coil,

The pair having a predetermined length includes a longitudinal direction portion, a small diameter connecting portion located at one end of the longitudinal direction, and a large diameter connecting portion located at the other end of the longitudinal direction, and the longitudinal direction is divided into a plurality of sections. In addition, any one section is formed to have a different length than the other sections to provide a deflection device for the cathode ray tube to change the curvature of the focal point screen corresponding to the section.

Preferably, the longitudinal direction portion is separated into a first section corresponding to a horizontal axis, a second section corresponding to a diagonal axis and a third section corresponding to a vertical axis.

The length along the tube axis direction of the second section corresponding to the diagonal axis is smaller than the length along the tube axis direction of the first and third sections.

As described above, according to the deflection apparatus according to the present invention, the diagonal convergence point screen is moved toward the fluorescent screen by the change of the length of the second section, thereby effectively reducing the mis-convergence occurring in the diagonal axis direction of the screen.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view of a deflection device according to an embodiment of the present invention, wherein the deflection device 2 includes a separator 4 which is an insulator, a pair of horizontal deflection coils 6a provided inside the separator 4, A pair of vertical deflection coils 6b provided on the outer side of the separator 4 and a core 8 mounted on the outer side of the separator 4 while surrounding the vertical deflection coils 6b.

The horizontal deflection coil 6a is disposed above and below the electron beam path, and generates a magnetic field in the vertical direction when current is supplied to deflect the electron beam in the horizontal direction. In addition, the vertical deflection coils 6b are disposed on the left and right sides of the electron beam path, and generate a horizontal magnetic field when supplying current to deflect the electron beam in the vertical direction.

Here, the deflection device 2 provided in this embodiment includes at least one of the horizontal deflection coil 6a and the vertical deflection coil 6b so as to minimize the miss-convergence occurring in the diagonal direction of the screen to realize a high quality screen. Configure as follows.                     

2 and 3 are plan and side views of the deflection coil according to the present embodiment, respectively.

As shown, the deflection coil 6 includes a pair of longitudinal sections 10, a small diameter connecting section 12 connecting one end of the electron gun side of the longitudinal section 10, and a fluorescent surface of the longitudinal section 10. It consists of a large diameter connecting portion 14 connecting one end of the side, the deflection magnetic field affecting the electron beam is mainly generated in the longitudinal direction (10).

In the present exemplary embodiment, the longitudinal part 10 is divided into three sections corresponding to the horizontal axis, the diagonal axis, and the vertical axis, that is, the first, second, and third sections 10a, 10b, and 10c. The second section 10b corresponding to the diagonal axis among the sections is shorter in length along the tube axis z direction than the first and third sections 10a and 10c.

That is, as can be seen from the drawing, the first and third sections 10a and 10c of the longitudinal section 10 have a length C along the direction of the tube axis z, while the second section corresponding to the diagonal axis ( 10b) has a length of D shorter than the first and third sections 10a, 10c in the direction of the tube axis z.

To this end, the second section 10b is wound with a radius larger than the first and third sections 10a, 10c, i.e., separately wound outward of the deflection coil 6, so that the second section 10b The length along the direction of the tube axis z may be smaller than the lengths of the first and third sections 10a and 10c.

This change in length of the second section 10b changes the curvature of the diagonal focus point screen corresponding to the second section 10b to reduce mis-convergence in the diagonal axis direction, and FIG. 4 shows a deflection according to the present embodiment. It is a schematic diagram which shows the distance between the center point screen of a horizontal axis | shaft, the vertical axis | shaft, and the diagonal axis | shaft, and the shadow mask S / M at the time of the coil 6 action | operation.

First, the horizontal and vertical concentration point screens at which the electron beam is focused may be represented by an arc E, and the center of the E arc is made of the same O point in both the horizontal and vertical axis directions.

On the other hand, since the second section 10b of the longitudinal portion 10 corresponding to the diagonal axis direction is formed to have a short length toward the fluorescent screen (not shown) in the diagonal axis direction of the screen, the diagonal focus point screen is configured. The center of the circular arc is the O 'point moved backward from the point O, so that the diagonal focus point screen is composed of the circular arc F having a radius longer than the horizontal and vertical focus point screens.

That is, in this embodiment, the diagonal focusing point screen moves toward the fluorescent screen than the horizontal and vertical focusing point screens, so that the three-strip electron beam emitted from the electron gun (not shown) has a longer focusing distance in the diagonal direction of the screen. do.

As a result, the amount of mis-convergence in the diagonal axis direction decreases by the amount of the focal point of the electron beam moving toward the fluorescent screen. The convergence amounts (V, H, D) are represented by 1.4 µm, 2.0 µm and 3.4 µm, respectively.

Thus, the miss-convergence amount in the diagonal axis direction in the deflection coil 6 according to the present embodiment has a value equal to the sum of the misconvergence amounts in the horizontal axis and vertical axis directions.

Therefore, when the non-uniform magnetic field is generated in the horizontal and vertical axis directions by adjusting the magnetic field generated by the deflection coil 6, the miss-convergence amount in the diagonal axis direction is canceled while the amount of mis-convergence in the horizontal and vertical axis directions is eliminated. It is possible to implement a screen in which miss-convergence does not occur in the diagonal direction of the screen.

As described above, the deflection coil 6 having the longitudinal section 10 composed of a plurality of sections can be easily manufactured by using a winding described below.

5 is a partially enlarged view of a winding coil for manufacturing a deflection coil according to a first embodiment of the present invention, and a part of the winding frame corresponding to the small-diameter connecting portion is omitted.

The winding frame 16 is a convex portion 18 having a predetermined curved surface to form a large diameter connecting portion, a concave portion 20 for winding a longitudinal direction, and the convex portion 18 The first to third through holes (18a, 18b, 18c) formed in the) and the first to third protruding rods (22a, 22b, 22c) fixed to the respective through holes, the concave portion 20 Is formed with a stepped portion 22 for forming the second section of the longitudinal portion.

Thus, as shown in FIG. 6, in the state where the first protruding bar 22a is fixed to the first through hole 18a, the wire 24 is connected to the first protruding bar 22a at the convex portion 18. By winding to the concave portion 20 through, the large diameter connecting portion of the deflection coil and the first section of the longitudinal direction are formed.

Then, in the state where the second protruding rod 22b is fixed to the second through hole 18b, the wire 24 is moved from the convex portion 18 to the concave portion 20 through the second protruding rod 22b. When wound, the wire 24 forms a second section of the longitudinal portion by the stepped portion 22 provided in the concave portion 20 together with the large diameter connecting portion.

Finally, in the state where the third protruding rod 22c is fixed to the third through hole 18c, the concave portion 20 passes through the wire 24 from the convex portion 18 through the third protruding rod 22c. By winding with a large diameter connecting portion and a third section in the longitudinal direction are formed.

7 and 8 are front and rear views of a winding coil for manufacturing a deflection coil according to a second embodiment of the present invention, respectively.

As shown, the winding frame 26 includes a plurality of wire guide walls 28 for dividing the inner surface of the winding frame 26 into a plurality of regions, and between the longitudinal direction 26a of the winding frame 26 and the large-diameter connecting portion 26b. A plurality of wire hook portion 30 for holding the wire in the support, and the back connecting portion 32 formed on the outer circumferential surface of the winding (26).

In particular, the winding frame 26 forms the shortest length of the wire guide wall 28 corresponding to the second section, in order to separate the longitudinal section of the deflection coil into first to third sections, which is the wire guide wall 28. ) To move to the back of the connection (32).

That is, the wire guide wall 28 in the longitudinal direction 26a of the winding frame 26 is composed of the first to fifth guide walls 28a to 28e in the order of winding of the wire, and corresponds to the first section of the longitudinal direction. The first and second guide walls 28a, 28b are formed with a third guide wall 28c corresponding to the second section of the longitudinal portion, while the second guide wall 28b is formed longer than the first guide wall 28a. ) Is formed shorter than the second guide wall 20b.

In addition, the fourth and fifth guide walls 28d and 28e corresponding to the third section of the longitudinal portion have a fifth guide wall 28e formed longer than the fourth guide wall 28d.

Thus, the electric wire (not shown) is wound from the inside of the winding frame 26 to form a part of the small-diameter connecting portion of the deflection coil, the first section of the longitudinal section and the portion of the large-diameter connecting portion, and then the third guide wall 28c is formed. Guide the wires through the back connection portion 32 to form a portion of the small diameter connecting portion and the second section of the longitudinal portion and a portion of the large diameter connecting portion.

Finally, rewinding the wire along the winding 26 allows deflection by forming part of the small-diameter connection and part of the longitudinal section and the large-diameter connection through the fourth and fifth guide walls 28d, 28e. Complete the coil.

At this time, when the wire hanger 30 is wound around the wire from the longitudinal direction portion (26a) to the large diameter connecting portion (26b), it serves to tension the wire so that the wire is accurately wound, the winding ( 26) is not limited to that described above.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the range of.

As described above, the deflection apparatus according to the present invention separates the longitudinal direction portion of the deflection coil into a plurality of sections, and forms one section corresponding to the diagonal axis of the screen to have a shorter length than the other sections. Therefore, the present invention has the effect of improving the screen quality of the cathode ray tube by minimizing the mis-convergence occurring in the diagonal direction of the screen by changing the curvature of the diagonal focus point screen.

Claims (8)

A separator that is an insulator; A pair of horizontal deflection coils provided inside the separator; A core installed outside the separator; And A pair of vertical deflection coils connected to the core and installed outside the separator, At least one of the horizontal deflection coil and the vertical deflection coil, A pair of longitudinal directions having a predetermined length; A small diameter connecting portion located at one end of the longitudinal direction portion; And It includes a large diameter connecting portion located at the other end of the longitudinal direction, The longitudinal section is divided into a plurality of sections, and any one of the plurality of sections is formed to have a length different from other sections except the one section along the tube axis direction of the cathode ray tube, wherein the one section Deflector for cathode ray tubes for changing the curvature of the focal point screen corresponding to the. The method of claim 1, Horizontal, vertical and diagonal axes are defined on the screen of the cathode ray tube, And the longitudinal direction portion is formed into a first section corresponding to the horizontal axis, a second section corresponding to the diagonal axis, and a third section corresponding to the vertical axis. The method of claim 2, A deflection device for cathode ray tubes, wherein a length along the tube axis direction of the second section is smaller than a length along the tube axis direction of the first and third sections. An iron portion corresponding to the shape of the large diameter connecting portion of the deflection coil; A concave portion corresponding to the shape of the longitudinal portion of the deflection coil; First to third through holes formed at predetermined intervals in the convex portion; And A first to third protrusion bar selectively fixed to the through hole, The longitudinal portion is formed into a first section, a second section and a third section respectively corresponding to the horizontal axis, vertical axis and diagonal axis defined on the screen of the cathode ray tube, The recess is provided with a step corresponding to the second section of the longitudinal section such that the second section has a length different from the first and third sections of the longitudinal section. A winding frame having a small diameter connecting portion, a longitudinal direction portion, and a large diameter connecting portion corresponding to the deflection coil; A plurality of wire guide walls dividing the inner surface of the winding into a plurality of regions; A plurality of wire hook portions for hanging and supporting electric wires between the lengthwise portion and the large diameter connecting portion of the winding frame; And On the outer circumferential surface of the winding frame includes a back connecting portion formed parallel to the large diameter connecting portion The wire guide wall corresponding to the second section formed in the longitudinal portion of the deflection coil corresponding to the vertical axis defined on the screen of the cathode ray tube in the longitudinal portion of the winding frame is formed to have a shorter length than other wire guide walls. Winding coil for making a deflection coil, wherein the back connection connects two wire guide walls corresponding to the second section. The method of claim 5, A deflection in which the wire guide wall is arranged from the inner side of the winding to the outside in the longitudinal direction of the winding frame, wherein the third guide wall corresponding to the second section is formed in the shortest length. Coil making machine. The method of claim 6, The first and second guide walls correspond to the first section formed in the longitudinal direction of the deflection coil corresponding to the horizontal axis defined on the screen of the cathode ray tube, wherein the second guide wall is formed longer than the first guide wall Winding coil for making deflection coil. The method of claim 6, The fourth and fifth guide walls correspond to the third section of the longitudinal direction of the deflection coil corresponding to the diagonal axis defined on the screen of the cathode ray tube, and the fifth guide wall is deflected longer than the fourth guide wall. Coil making machine.

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