JPS6139439A - Saddle coil of electromagnetic deflecting unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a saddle coil having a conductor pattern on assembled insulating film portions and used to deflect the electron beam of a cathode ray display tube in one of two orthogonal directions. This relates to a manufacturing method. The present invention further relates to a deflection coil assembly using the saddle coil, an electromagnetic deflection unit, and a method of manufacturing the same.

Numerous proposals have been made in the past to replace the conventional wound saddle coils used for electromagnetic deflection of cathode ray tubes with coils made by so-called printed circuit or printed wiring techniques. These proposals concern coils for use in television picture tubes where the coil is relatively simple in shape and does not have the special shaping problems faced by the neck-cone shape of the television picture tube. British patent specification no. I made it to 2
The above problem is overcome by creating one Koino k. Saddle coils made in this manner do not lend themselves easily to multilayer constructions due to the difficulty in providing the required connections between the cylindrical and annular portions, and the aforementioned specifications
In the case of more than one layer, this is actually a different matter.
It involves two layers with deflection coils for the direction. Due to the aforementioned limitations in the shape of the saddle coil thus made, this coil is only suitable for use as a deflection coil in monochrome picture tubes with limited deflection angles.

This type of saddle coil is therefore not suitable for wide-angle monochrome picture tubes or for color picture tubes where the required deflection field imposes particular rigor on the shape and construction of the saddle coil.

SUMMARY OF THE INVENTION An object of the present invention is to provide a saddle coil, a deflection coil assembly, a deflection unit, and a method for manufacturing the same, which are suitable for use in a wide-angle monochrome picture tube or a color picture tube.

The saddle coil of the present invention has the following features. That is, in a saddle coil used to deflect the electron beam of a cathode ray display tube having a conductive pattern on the assembled insulating film sections, each saddle coil has a predetermined conductive pattern on its respective section. It has a plurality of layers formed of a U-shaped flaky first part and a flaky second part that are bent so as to spread in the shape of a morning glory of an insulating film having a pattern, and each of the above-mentioned parts the width of the conductive pattern at any point is slightly greater than the width of the conductive pattern at that point, and the ends of said first part are such that the conductive pattern on said second part forms one coil. The plurality of layers are bridged by a second portion to provide the required connection between the ends of the distal conductive pattern on the first portion, and the layers are arranged such that the transverse legs and flared sides of the first portion are a second portion forming a gun end and a side member of the saddle coil, respectively, and a second portion forming a screen end of the saddle coil;

With the necessary connections between the different layers of the coil, they are glued together to create a rigid, self-supporting saddle coil.

The ends of the first part of the U-shape have projections that are bent inwardly, while the second part is also U-shaped with legs that are shorter than the transverse legs, and the side legs of this second part are A portion may overlap a portion of the protrusion of the first portion.

The conductive pattern on the second portion of each layer faces the conductive pattern at the end of the first portion, and welds the conductive pattern member on the second portion to the respective member of the conductive pattern on the first portion. can do.

For precise alignment between layers, the insulating films of the first and second portions can have stationary holes that are aligned within the saddle coil.

The present invention further provides that the deflection coil assembly comprises the aforementioned first and second deflection coil assemblies located diagonally opposite each other around a virtual cylinder having a diameter not smaller than the diameter of the neck of the cathode ray display tube used. There is also provided a deflection coil assembly for use in deflecting the electron beam of a cathode ray display in one of two orthogonal directions, having a saddle coil.

Such a deflection coil assembly may have a conical support on the inner surface of which the first and second saddle coils are mounted.

If the saddle coil is provided with fixing holes, the first and second side coils can be positioned by these fixing holes.

The invention further provides that the electromagnetic deflection units form first deflection coil assemblies located diagonally opposite each other around a virtual cylinder having a diameter not smaller than the diameter of the neck of the cathode ray display tube used. each forming a pair of first saddle coils, each as described above, and a second deflection coil located diagonally opposite each other on the outside thereof and offset by 90° with respect to said first pair of saddle coils; provides an electromagnetic deflection unit having first and second deflection coil assemblies for use in respectively orthogonally deflecting an electron beam of a cathode ray display tube, and a second pair of saddle coils as previously described.

This electromagnetic deflection unit has a conical support, a first pair of saddle coils can be attached to the inner surface of said support, while two pairs of second saddle coils can be attached to the outer surface of said support. Said support may be provided with a stationary pin on at least one of its faces, said pin being adapted to engage a corresponding stationary hole formed in each pair of saddle coils.

The first and second saddle coil pairs can be glued together, and correct positioning of the first and second saddle coil pairs can be ensured by aligning the positioning holes of the saddle coils.

The invention further provides the aforementioned first saddle coils forming a first deflection coil assembly located diagonally opposite each other around a virtual cylinder having a diameter not smaller than the diameter of the neck of the cathode ray tube used. and a second deflection coil assembly wound toroidally around a magnetic core mounted on the first deflection coil assembly, the first deflection assembly being positioned 90 degrees offset relative to the second deflection coil assembly. This provides an electromagnetic deflection unit.

Such an electromagnetic deflection unit can have a cylindrical support with a saddle coil mounted on the inside and a wound core mounted on the outside.

A first deflection coil assembly can be bonded to the wound core.

The present invention further provides the following electromagnetic deflection unit. That is, the first and second deflection coil assemblies are used to respectively deflect the electron beam of the cathode ray display tube in orthogonal directions, and the first and second deflection coil assemblies are respectively used to deflect the electron beam of the cathode ray display tube in orthogonal directions. In an electromagnetic deflection unit having a pair of first and second saddle coils with each saddle coil formed by a conductive pattern, each saddle coil has a morning glory-shaped insulating film having a predetermined conductive pattern on its respective portion. The first and second parts of one of the first pair of saddle coils have a plurality of coils formed of a U-shaped flaky first part and a flaky second part that are bent so as to spread out. is the other first of this pair
and a second portion, respectively, while the first and second portions of one of the second pair of saddle coils have the same shape, respectively, as the first and second portions of the other of the pair; The distal ends of the sections are bridged by the second section, the transverse leg and flared side legs of the first section forming respectively the electron gun end and the side member of the layer of the saddle coil, while the second section portions form at least the screen side edges of the saddle coil eyebrows, the conductive pattern on the second portion provides the required interconnection between the ends of the first portion, and each successive layer of the first pair of saddle coils Diagonally opposite each other, while each successive layer of the second pair of saddle coils
each layer of the pair of saddle coils is positioned offset by 90° with respect to the second pair of saddle coils, and the layer of the first pair of saddle coils is interposed between the layers of the second pair of saddle coils,
Diagonally opposite each other, the layers of the first and second pairs of saddle coils are adhered to form a rigid, self-supporting assembly, and the necessary electrical connections are made to form the first and second deflection coil assemblies. between the respective coils of each saddle coil pair, while a magnetic core surrounds the assembly of saddle coil pairs to form an electrical deflection unit.

Each saddle coil is provided with a locating hole that allows positioning of the first and second deflection coil assemblies.

The present invention further provides a deflection coil assembly for use in deflecting the electron beam of a cathode ray display tube in one of two orthogonal directions, the conductive pattern on the assembled insulating film portions forming a saddle coil. The present invention provides a method for manufacturing a saddle coil, which is characterized by: (i) for each of the plurality of layers, the width at any point of each part is slightly larger than the width of the conductive pattern at that point; (ii) a roughly U-shaped flaky body part and a flaky second part are made from an insulating film having a predetermined conductive pattern on each part, and (ii) the first part is spread out in the shape of a morning glory. and bridging the distal end of this first section with said second section, the transverse leg of the first section forming the electron gun side end, while the second section forming at least the screen side end of the layer of saddle coils. , the flared legs of the first part form the side members of the saddle coil layer, and the conductive pattern on the second part is connected between the ends of the distal conductive pattern of the first part. (iii) assembling the first and second parts to form a layer by lengthening the required p-interconnects to form a coil; assembling to form a rigid self-supporting saddle coil; and (iv) providing the required connections between coils of different layers of the saddle coil.

The advantage of using printed wiring technology to make coils or different layers is that not only is the manufacturing equipment cheaper than that of wound saddle coils, but the conductors can be produced accurately in samples of the same saddle coil. It means that it is located.

The ends of the first part of the U-shape have protrusions bent towards each other, while the second part is also U-shaped, the side legs of which are shorter than the transverse legs; The legs of the second part can be assembled such that a portion of each leg of the second part overlaps each protrusion of the first part.

In assembly, the conductive pattern on the second portion may face the conductive pattern at the end of the first portion, and the conductive backcoon on the second portion may be welded to the conductive pattern on the first portion.

Positioning holes may be provided in the insulating film of the first and second parts, the positioning of the first and second parts in the assembly being effected by said positioning holes, while the alignment of successive layers of the saddle coil is also effected by said positioning holes. can.

The invention further provides a method of manufacturing a deflection coil assembly for use in deflecting the electron beam of a cathode ray display tube in one of two orthogonal directions, the method comprising:
(i) making first and second saddle coils by the method described above; and (ii) making the first and second saddle coils smaller than the diameter of the neck of the cathode ray display tube in which the deflection coil assembly is to be used; and a step of assembling the cylinders so that they are formed diagonally opposite each other around a virtual cylinder having a diameter of zero.

Although the saddle coil itself is self-supporting, the method described above may include the additional step of attaching the assembled first and second saddle coils to the inner surface of the cylindrical support for positioning the saddle coil. .

If the layers of the saddle coils are provided with positioning holes, the first 'J6 and second coils can be positioned by means of the positioning holes in the assembly.

The invention further provides a method of manufacturing an electromagnetic deflection unit having first and second deflection coil assemblies used to deflect an electron beam of a cathode ray display tube in respective orthogonal directions, the method comprising: i) forming a first pair of saddle coils by the method described above, and (ii) forming the first pair of saddle coils thus formed into an imaginary cylinder not smaller in diameter than the neck of the cathode ray display tube in which the deflection unit is used. (iii) forming a second pair of saddle coils by the method described above; (iv) forming a second pair of saddle coils so formed; 90° to the outside of said first deflection coil assembly.
(v) providing a magnetic core around the assembled saddle coil pair to form an electromagnetic deflection unit; .

Assembly of the first and second pairs of saddle coils may include attaching the pairs of saddles to the inner and outer surfaces of the conical support, respectively, to provide relative positions of the saddle coils.

If the layers and the saddle coils are provided with fixing holes, at least one of the faces of the support is provided with a fixing pin, and the mounting of each pair of saddle coils is carried out by engaging this fixing pin with the fixing hole of the saddle coil. be able to. Alternatively, the second pair of saddle coils can be glued to the first pair of saddle coils. Each saddle coil of the pair of saddle coils is in this case provided with a stationary hole on the first and second pair of saddle coils to ensure accurate positioning of the first and second deflection coil assemblies. It is also possible to align the relevant fixing holes correctly.

The invention further provides a method of manufacturing an electromagnetic deflection unit comprising first and second deflection coils used to deflect the electron beam of a cathode ray display tube in respective orthogonal directions, the method comprising: (i) forming a pair of saddle coils as described above; and (ii) forming a pair of saddle coils so formed into a virtual (iii) winding a second deflection coil assembly toroidally around the magnetic core; (iv) Assemble the wound magnetic core and the first deflection coil assembly,
forming a deflection unit having a first deflection coil assembly mounted offset.

Assembling the wound magnetic core assembly and the first eccentric coil assembly includes attaching a first pair of saddle coils to an inner surface of a conical support and attaching the wound magnetic core to an outer surface of the support. I can do it. Alternatively, the first deflection coil assembly can be glued to the wound magnetic core.

The present invention further includes first and second deflection coil assemblies used to respectively deflect the electron beam of the cathode ray display tube, the first and second deflection coil assemblies each including the first and second deflection coil assemblies.
and a second pair of saddle coils, each saddle coil being formed by a conductive pattern on the assembled insulating film. For each of the multiple layers of the coil, approximately U
a first portion in the shape of a flake and a second portion in the shape of a flake. (ii) a pair of saddle coils having the same shape, while the first and second portions of one of the second pair of saddles have the same shape as the first and second portions of the other pair of second saddles, respectively; (ii) a pair of saddle coils; For each saddle coil, the first part is bent 1' so as to spread out in a morning glory shape, and the end of the first part is bridged with the second part, so that the transverse leg of the first part and the spread side leg are connected. form the gun-side edge and side member of the layer of side coils, respectively, while the second portion forms at least the screen-side edge of the layer of saddle coils, and the conductive pattern on the second portion forms the gun-side edge and side member of the layer of side coils, respectively. (iii) for each of the first pair of saddle coils, the layers thus formed are then diametrically opposed to each other; Then, for each of the second saddle and the coil pair,
The layers thus formed are positioned diametrically opposite each other, with each layer of the first pair of saddle coils being offset by 90 degrees with respect to the second pair of saddle coils, and the layers of the first pair of saddle coils being positioned diametrically opposite each other. The first coil is inserted between the layers of the saddle coil pair.
and (iv) adhering the layers of the second pair of saddle coils to each other and (iv) providing the required electrical connections between the layers of each pair of saddle coils so formed and between each pair of saddle coils to form the first and second deflection coil assemblies. (v) positioning a magnetic core around the assembly of saddle coil pairs to form an electromagnetic deflection unit.

Deflection coils made in this way have the advantage that the line and field deflection coil assemblies can be precisely positioned with respect to each other and transformer effects between the two deflection coil assemblies are reduced.

Each portion of each layer can be provided with stationary holes that are used to provide the desired positioning between the layers and thus between the first and second deflection coil assemblies.

The invention will be explained in more detail below by means of examples with reference to the accompanying drawings.

FIG. 1 is a diagrammatic cross-sectional view of a Mura television picture tube assembly with the vertical axis indicated by Z, the picture tube 1 having a display screen 2 at the conical end of the tube, while the picture tube 1 has a display screen 2 at the conical end of the tube; The neck 3 has three electron guns 4 lying in one plane, said longitudinal axis being on the same axis as the central electron gun. An electromagnetic deflection unit 5 is attached to the picture tube so as to surround a portion of the tube and a cone-shaped portion. This deflection unit 5 includes a line deflection coil assembly 7 formed by a first pair of saddle coils and a field deflection coil assembly 8 formed by a second pair of saddle coils, and these two coil assemblies are arranged in a circular shape. It is surrounded by a magnetic core 6 of soft magnetic material in the form of a ring spread out into a shape. The two deflection coil assemblies are typically mounted on a support (not shown) of insulating material in the shape of a generally truncated cone. The end portion of each saddle coil adjacent to the electron gun 4 (hereinafter referred to as the electron gun side end) is bent from the neck and longitudinal axis of the tube, unlike the portion adjacent to the display screen 2 (hereinafter referred to as the screen side end). In fact, there is a “shell (
shell)' or 'mussel'
Shown as type. With this type of saddle, the magnetic core 6 can be formed as a single piece, i.e. if the saddle coil is bent at its gun end, the magnetic core 6 can typically be formed into two pieces. It must be assembled from parts and these parts must be clasped or glued together.

Figure 2 shows a screen size of 22 inches and a deflection angle of 11 inches.
A typical saddle coil of a current color television picture tube line deflection coil assembly at 0° is shown. In FIG. 2, reference numeral 9 indicates the end of the saddle coil on the electron gun side, while reference numeral 10 indicates the end of the saddle coil on the screen side. Reference numerals 11 and 12 indicate side members that connect the electron gun side end 9 and the screen side end 10 and are spread out in the shape of a morning glory. The screen end of the saddle coil has a transverse section 13 and sections 14 and 15 connecting this transverse section 13 to the respective side members. The part between said side member 11.12 and the associated part 14.15 has a 16A gap between the windings.

It is rolled up to create the spaces shown at 16B, 17A and 1.7B. A corresponding space may also be provided at the electron gun side end of the saddle coil. The electron gun side end 9, the screen side end 10 and the side members 11 and 12 form a window 18. A typical saddle coil of such a picture tube field deflection coil assembly is formed in a manner similar to that described above, except that the shapes and dimensional ratios of the various parts differ from those of the line deflection coil assembly. .

The aforementioned saddle coils are typically wound from small diameter copper wire, for example 0.5 mm, and the wire is coated with an insulating thermoset adhesive. The winding involves winding the saddle coil to approximately its final shape and closing the space adjacent the screen edge (16A, 16B, t7 in FIG. 2) during the winding process.
A and 17B) are carried out on a special winding machine,
The shape of these spaces can be determined by retractable pins of the winding head that can delimit the shape of the space. Each saddle coil is then held in a jig under pressure to obtain the required machine dimensions;
An electric current is passed to soften the thermoset adhesive, which is then cooled to join the windings together to form a self-supporting coil. Such winding machines are extremely expensive and any slight variation in the windings from one machine to another should be reproducibly accurate for color picture tubes. It is quite clear that changes can occur in the deflection field generated by a coil-based deflection unit.

In accordance with the present invention, each saddle coil, at least for a line deflection coil assembly, is formed from multiple layers of insulating film having a conductive pattern, typically copper. In this case, the stratum corneum forms a flexible printed circuit, the conductive pattern of which can be provided using one of the techniques well known for the production of printed wiring.

The required shape of the saddle coil when made is the shape shown in Figure 2 or a similar shape, depending on the picture tube in which this saddle coil is used and whether this saddle coil is for line deflection or field deflection. It will be appreciated that in order to reliably reproduce the desired shape, each layer cannot be made as a single piece from a flat, flaky sheet of printed circuit film. For this reason, each layer is made up of first and second flakes, which are shown in FIGS. 3 and 4. Most of the references used in these two drawings are as shown in FIG. 2, except that portions 14 and 15 are separated and the separated portions are labeled A and B. It is the same as the corresponding part of the saddle coil. The first section shown in FIG. 3 is generally U-shaped, with the distal sections bent to form sections 14A and 158, with the films separated at 19. As can be seen in Figure 3, the width of the first portion is only slightly larger at any point than the width of the conductive pattern at that point. This first
Some of the copper conductors on the section have the sign 20.21°22
and 23, but it will be appreciated that there are other conductors between these conductors. 2 shown in Figure 4.
The sections are shallow U-shaped, with the shorter legs forming sections 14B and 15B and the transverse section forming a bridging member forming transverse section 13. This second part also has a copper conductor;
Although only four of them, 25.26° 27 and 28, are shown, it will be appreciated that there are other conductors between the illustrated conductors. This conductor provides the necessary connections between the conductors on the first part and creates the coil described below.

The first and second parts of each layer of the saddle coil are connected such that the conductor on the first part contacts and is connected to the conductor on the second part (this is preferably done by ultrasonic welding). part 14
A and 148 questions and portions 15A and 15B are assembled in a jig so that they overlap and the image portions are positioned as shown in FIG. Assembly is carried out by bending the first part from an approximately U-shape to approximately a ■-shape on a flat surface, and accurate positioning of the two parts is performed by
This is done by using stationary holes in the two parts of the insulating film at locations where the conductors are suitably spaced or at additional locations outside the conductors. The first part mentioned above is
Its shape is bent to match the contours of the neck-to-cone transition relationship of the picture tube.

A suitable location for the fixing hole in the first part is space 16A, 1
It may also be 68° 17A or 17B. The shape of the resulting layer in FIG. 5 corresponds approximately to the shape of the saddle coil in FIG.

A complete saddle coil can be made by assembling a number of such layers, for example six, in a jig with suitable interconnections between the layers.The insulating film and conductors of each layer can be Because of its flexibility, layers of adhesive, such as cold or thermosetting adhesives, can be applied using silk screens or other masks between successive layers.The adhesive between the layers of the assembly is then cured. However, in the case of thermoset adhesives heat is required and this heat can be provided by an external heat source or by applying a current of sufficient magnitude through the turns of a saddle coil so formed. Once the adhesive has cured, the assembly forms a rigid, self-supporting saddle coil of the same shape as shown for the wound saddle coil of FIG.

In such a saddle coil, the transverse portion of the first portion forms the electron gun end, while the side legs of the first portion form flared side members. The second portion forms at least a portion of the screen side edge.

The conductive pattern on the first portion of each layer as shown in FIG. 3 is symmetrical with respect to a broken line C passing through the center of the separating portion 19 and the electron gun side end 9. The beginning and end of the coil of each layer is given by the part 148 where the two parts overlap in the assembly, and the beginning and end of the winding is such that the deflection current flows from the outside to the inside in the case of odd numbered layers. In the case of even numbered layers, the layers may be alternated so as to flow from the inside to the outside. This can be achieved by using a conductive backing between each layer of the first part, and by making the conductive pattern for the second part different between the odd-numbered layer and the even-numbered layer.

FIGS. 6 and 7 illustrate this, and these drawings show that the second part of one layer is connected to parts 14A and 15 of the first part.
This is shown together with A. In these drawings, the second
The conductors 25, 26, 27 and 28 on the sections are shown as dotted lines as they are below the insulation sheath, while the conductors on the first section on the top side of said sheath are shown in solid lines. As can be seen from these figures, sections 14B and 15B overlap with sections 14A and 15A, respectively, and the conductors of these sections are welded together by ultrasonic welding. Between portions 15A and 15B conductors 25° 26, 27 and 2
8 always overlap each other, conductors 20, 21, 22
and 23 are welded. Part 14 of Figure 6
A, 14B (for example, for odd numbered layers)
The upper conductors do not overlap completely; conductors 25, 26 and 27 on the second part overlap and are welded with conductors 21, 22 and 23 on the first part, respectively. In this FIG. 6, the beginning Sl of the formed coil is connected to the conductor 28 on the second part, while the end Fl of this coil is connected to the conductor 28 on the second part.
is taken out from the conductor 20 on the first part. In FIG. 7 (in this case for the even numbered layers), the overlap of the conductors is again not complete in sections 14A and 14B, with conductors 26, 27 and 28 on the second section overlapping, respectively, and on the first Welded with conductors 20.21 and 23 on the part. In FIG. 7, the beginning S2 of the coil is connected to the conductor 25 on the second part, and the end F2 is taken out from the conductor 23 on the first part. For successive layers, the end of an odd numbered layer Fl is connected to the beginning of the next even numbered layer, while the end of an even numbered layer F2 is connected to the beginning of the next odd numbered layer S.
1, and so on. In Figures 6 and 7,
As before, only four conductors are shown on the first and second parts for simplicity.

By way of example, the saddle coil of the present invention was designed to replace a wound saddle coil having 144 turns of insulated conductor wire with a diameter of 0.5 mm. This alternative saddle coil has six layers, each layer having a four-turn coil formed as shown in FIG. 8, where a--insulation thickness--0,1 to 0. 2 m + ab - Thickness of the copper layer - 0,3 mm C - Width of the copper conductor - 0.65 each d - Distance between the conductors - 〇,, 35 m + n, with these dimensions, the cross-sectional area of each copper conductor is 0. It was found that the cross-sectional area approximately corresponds to the cross-sectional area of a wire with a diameter of 5 mm. Suitable materials for the film are polyesters or polyamides, which are commercially available under various trade names.

A pair of saddle coils made as previously described may be used as the line deflection coil assembly 7 of FIG. 1, or may be made in a similar manner but different from forming the field deflection assembly 8 of the figure. It can also be combined with a pair of saddle coils of different dimensions. Alternatively, the Cape Fino deflection coil assembly can be wrapped toroidally around the magnetic core 6 in a known manner.

A line and field deflection coil assembly 7 as shown diagrammatically in FIG. 1, assembled in a conventional manner.
and 8, because the field deflection coil assembly is further away from the electron beam than the line deflection coil assembly, the field coil assembly is less sensitive than the line coil assembly. When assembling the deflection unit, the line coil assembly is not in exactly the correct rotational position relative to the field coil assembly, which can create a transformer effect between the two coil assemblies. Stiffness and precise rotational position can be obtained by precisely positioned emplacement holes and subsequent gluing, with or without supports between the deflection coil assemblies, while sensitivity issues can be obtained by Instead of assembling the coils separately from their individual layers, one can eliminate the four saddle coil layers for the field deflection coil assembly between the saddle coil layers for the line deflection coil assembly. The line and field deflection coil assembly is made from the individual layers of the four saddle coils as a unitary structure by interpolating the four saddle coils. This is done by applying an adhesive between the different layers in a suitable jig, which when cured results in a rigid structure of two deflection coils whose rotational position is precisely determined; , can be obtained with added adhesive such that the transformer action between the two coil assemblies is significantly reduced, if not eliminated. The sensitivity of the field deflection coil assembly is increased by the insertion of two saddle coil layers of the deflection coil assembly.

According to the present invention, the positioning of the (copper) conductive pattern from a flat flake shape to each i1;, 2'? Department.

From minute manufacturing to final saddle coil and assembly details, it can be precisely controlled. Although not previously mentioned, the dimensions of each successive layer may vary slightly such that the outer layer is larger than the inner layer. If the conductive pattern on the first part of each layer is symmetrical and the interconnections are provided in the second part, the deflection fields generated at the sides are very large. By changing the current in the coils between successive layers, for example from outside to inside in one layer and from inside to outside in the next layer, any magnetic field errors occurring at the screen edges of the saddle coils are eliminated.

It will be clear that saddle coils that can be made by the method described above may have other shapes than those illustrated.

Furthermore, the shapes of spaces 16A, 168, 17A and 17B may also differ from that shown and may have shapes that are very difficult to obtain with wire-wound saddle coils.

As previously mentioned, the conductive pattern on each layer is formed by printed wiring techniques, but this is more effective than starting from a film with a conductive layer and etching it into the desired pattern. The present invention includes, but is not limited to, techniques in which the conductive pattern is applied in strips or as a complete pattern and adhered to the film.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of the color image receiving space and the electromagnetic deflection unit, Fig. 2 is a perspective view of a known wound saddle coil used in the deflection unit, and Fig. 3 is one part of the saddle coil of the present invention. FIG. 4 is a plan view of the other part of the saddle coil of the present invention; FIG. 5 is a perspective view of one layer of the saddle coil made from the parts of FIGS. 3 and 4; 7 and 7 are enlarged plan views of a portion of FIG. 6, and FIG. 8 is an enlarged sectional view of one layer. 2... Display screen 3... Neck 4... Electron gun 5... Deflection unit 6... Magnetic core 7... Line deflection coil assembly... Field deflection coil assembly 9... Electron gun side Edge 1O...Screen side edge 11, 12...
・Side member 13...Cross member 14A, 148
．． 15A, 15B...overlap portion 16A,
16B, 17A, 17B...Space 19...
・Separation part

Claims (1)

[Claims] 1. In a saddle coil having a conductive pattern on the assembled insulating film portion and used to deflect the electron beam of a cathode ray display tube in one of two orthogonal directions, each saddle coil is a layer formed of a U-shaped flaky first part and a flaky second part, each of which has a predetermined conductive pattern on each part, and is bent to spread like a morning glory. a plurality of layers, each of said portions having a width at any point slightly greater than the width of the conductive pattern at that point, and an end of said first portion forming a coil; The conductive patterns on the second portion of the first portion are bridged by the second portion to provide the required interconnections between the ends of the distal conductive patterns on the first portion, and the plurality of layers are connected to the transverse legs of the first portion. and the flared side portions form an electron gun side end and a side member of the saddle coil, respectively, while the second portion forms a screen side end of the saddle coil,
A saddle coil, characterized in that the saddle coil is bonded together to create a rigid, self-supporting saddle coil, with the necessary connections between the different layers of the saddle coil. 2. The ends of the first U-shaped part have protrusions bent inwardly, while the second part is also U-shaped with legs shorter than the transverse legs; Part of the lateral leg is the first
The saddle coil according to claim 1, which overlaps a portion of the protrusion of the portion. 3. The conductive pattern on the second portion of each layer faces the conductive pattern at the end of the first portion, and the conductive pattern members on the second portion are welded to respective members of the conductive pattern on the first portion. A saddle coil according to claim 1 or 2. 4. The saddle coil according to claim 1, 2 or 3, wherein the insulating films of the first and second parts have stationary holes aligned within the saddle coil. 5. Claims located diagonally opposite each other around an imaginary cylinder having a diameter not smaller than the diameter of the neck of a cathode ray display tube used for deflecting an electron beam in one of two orthogonal directions A deflection coil assembly comprising the first and second saddle coils according to any one of the ranges 1 to 4. 6. The deflection coil assembly according to claim 5, wherein the deflection coil assembly has a conical support, and the first and second saddle coils are attached to the inner surface of the support. 7. A deflection coil assembly as claimed in any one of claims 4, 5 or 6, wherein the first and second saddle coils are positioned by stationary holes. 8. first deflection coil assemblies located diagonally opposite each other around a virtual cylinder having a diameter not smaller than the diameter of the neck of the cathode ray display tube used to deflect the electron beams in respective orthogonal directions; 5. A deflection coil assembly according to claim 1, further comprising second deflection coil assemblies located outside thereof diagonally opposite each other and offset by 90° with respect to the deflection coil assembly. an electromagnetic deflection unit having first and second pairs of saddle coils. 9. A conical support according to claim 8, wherein the first saddle coil pair is attached to the inner surface of the support, while the second saddle coil pair is attached to the outer surface of the support. Electromagnetic deflection unit. 10. An electromagnetic deflection unit according to claim 9, wherein the support has a stationary pin on at least one side thereof, which pin engages with a corresponding stationary hole formed in each pair of saddle coils. 11. The electromagnetic deflection unit according to claim 8, wherein the first saddle coil pair and the second saddle coil pair are bonded to each other. 12. The electromagnetic deflection unit of claim 11, wherein correct positioning of the first and second pairs of saddle coils is ensured by aligning the mounting holes of the saddle coils. 13. first deflection coil assemblies located diagonally opposite each other around a virtual cylinder having a diameter not smaller than the diameter of the neck of the cathode ray tube used to deflect the electron beam in each orthogonal direction; and a second deflection coil assembly wound in a toroidal manner around a magnetic core mounted on the first deflection coil assembly.
An electromagnetic deflection unit comprising a pair of saddle coils according to any one of claims 1 to 4, which are positioned 90° offset with respect to a deflection coil assembly. 14. The electromagnetic deflection unit according to claim 13, wherein the electromagnetic deflection unit has a cylindrical support having a saddle coil attached to the inner surface and a wound magnetic core attached to the outer surface. 15. The electromagnetic deflection unit according to claim 13, wherein the first deflection coil assembly is bonded to the wound magnetic core. 16. first and second deflection coil assemblies used to respectively deflect the electron beam of the cathode ray display tube in orthogonal directions, the first and second deflection coil assemblies comprising:
In an electromagnetic deflection unit having first and second pairs of saddle coils with each saddle coil formed by a conductive pattern on a respective assembled insulating film section, each saddle coil has a predetermined conductive pattern on its respective assembled section. The first saddle coil pair has a plurality of layers formed of a U-shaped flaky first part and a flaky second part that are bent so as to spread out in the shape of a morning glory of an insulating film having a pattern. The first and second parts of one of the pair have the same shape as the first and second parts of the other of the pair, while the first and second parts of one of the second pair of saddle coils have the same shape as the first and second parts of the other of the pair, respectively. 1 and the second part have the same shape, the ends of the first part are bridged by the second part, and the transverse leg and the flared side legs of the first part are respectively made of layers of saddle coils. an electron gun side edge and a side member, while the second portion forms at least the screen side edge of the layer of the saddle coil, and the conductive pattern on the second portion forms the desired interconnection between the ends of the first portion. , each successive layer of the first pair of saddle coils is diagonally opposed to each other, while each successive layer of the second pair of saddle coils is such that each layer of the first pair of saddle coils is opposite to the second pair of saddle coils. The first and second saddle coils are positioned offset from each other by 90° with respect to the saddle coils, and are diagonally opposed to each other such that the layers of the first pair of saddle coils are interposed between the layers of the second pair of saddle coils. The layers of the coil pairs are bonded to form a rigid, self-supporting assembly, and the necessary electrical connections to form the first and second deflection coil assemblies are made between the respective layers of each saddle coil pair and between the respective layers of each saddle coil pair. An electromagnetic deflection unit, characterized in that the magnetic core surrounds the assembly of saddle coil pairs between the respective coils, while forming the electromagnetic deflection unit. 17. The electromagnetic deflection unit according to claim 16, wherein each saddle coil is provided with a fixing hole, and the fixing hole positions the first and second deflection coil assemblies. 18. A saddle coil of a deflection coil assembly used for deflecting the electron beam of a cathode ray display tube in one of two orthogonal directions, the saddle coil being formed by a conductive pattern on the assembled insulating film portion. In a method of manufacturing: (i) for each of the plurality of layers, an insulating film having a predetermined conductive pattern on each portion such that the width at any point of each portion is slightly greater than the width of the conductive pattern at that point; (ii) bending the first part so as to spread out into a morning glory shape;
bridging the distal end of the first section with the second section, the transverse leg of the first section forming the electron gun end, while the second section forming at least the screen end of the layer of the saddle coil; - The flared side legs of the first part form the side members of the side coil layer, and the conductive pattern on the second part forms the side members of the layer of the side coil.
(iii) assembling the first and second portions to form one layer by providing the required interconnections between the ends of the conductive pattern at the ends of the portions to form a coil; (iii) thus forming a coil; assembling the layers so that successive layers adhere to each other to form a rigid, self-supporting saddle coil; and (iv) providing the desired connections between the coils of different layers of the saddle coil. Method of manufacturing saddle coils. 19. The ends of the first part of the U-shape have protrusions bent inwardly, while the second part is also U-shaped with its lateral legs shorter than the transverse legs, and each of the second parts 19. The manufacturing method according to claim 18, wherein the legs are assembled so that a portion of the legs overlaps each protrusion of the first portion. 20. In the assembly, the conductive pattern on the second part faces the conductive pattern at the end of the first part;
20. A method as claimed in claim 18 or claim 19, in which the conductive pattern on the part is welded to the conductive pattern on the first part. 21. Providing positioning holes in the insulating film of the first and second parts, the positioning of the first and second parts in the assembly is carried out by said positioning holes, while the alignment of successive layers of the saddle coil is also carried out by said positioning holes; A manufacturing method according to claim 18, 19, or 20. 22. (i) forming first and second saddle coils, and (ii) forming the first and second saddle coils to have a diameter not less than the diameter of the neck of the cathode ray display tube in which the deflection coil assembly is to be used; A cathode ray display tube comprising the steps of the method for manufacturing a saddle coil according to any one of claims 18 to 21, which are assembled so as to be diagonally opposed around a virtual cylinder having A method of manufacturing a deflection coil assembly used to deflect an electron beam in one of two orthogonal directions. 23. The manufacturing method according to claim 22, further comprising the additional step of attaching the assembled first and second saddle coils to the inner surface of the cylindrical support. 24. The method of claim 22, wherein the first and second saddle coils are positioned in the assembly by positioning holes. 25. (i) forming a first pair of saddle coils, and (ii) incorporating the first pair of saddle coils thus formed into a virtual cylinder having a diameter not less than the diameter of the neck of the cathode ray display tube in which the deflection unit is to be used; (iii) forming a second pair of saddle coils; (iv) disposing the second pair of saddle coils so formed; , 90° to the outside of said first deflection coil assembly.
(v) a magnetic core is provided around the assembled saddle coil pair to form an electromagnetic deflection unit; First and second deflection coil assemblies used to deflect an electron beam of a cathode ray display tube in respective orthogonal directions, comprising the steps of the saddle coil manufacturing method according to any one of items 18 to 21. A method for manufacturing an electromagnetic deflection unit. 26. The manufacturing method according to claim 24, wherein assembling the first and second saddle coil pairs includes the step of attaching these saddle coil pairs to the inner and outer surfaces of the conical support, respectively. 27. Providing a stationary pin on at least one of the faces of the support;
27. The manufacturing method according to claim 26, wherein each pair of saddle coils is attached by engaging the fixing pin with the fixing hole of the saddle coil. 28. The manufacturing method according to claim 24, comprising the step of bonding the second saddle coil pair to the first saddle coil pair. 29. A stationary hole is provided in each saddle coil of each of the saddle coil pairs relative to the first and second side coil pairs to ensure accurate positioning of the first and second deflection coil assemblies. 28. The manufacturing method according to claim 27, further comprising the step of properly aligning the fixing holes. 30. (i) constructing a pair of saddle coils, and (ii) disposing the pair of saddle coils thus formed diagonally around an imaginary cylinder having a diameter not less than the diameter of the neck of the cathode ray display tube in which the deflection unit is used. (iii) winding a second deflection coil assembly in a toroidal manner around the magnetic core; (iv) forming a second deflection coil assembly in a toroidal manner around the wound magnetic core; and the first deflection coil assembly to form a deflection unit having the first deflection coil attached at an angle of 90 degrees with respect to the second deflection coil assembly. A method of manufacturing an electromagnetic deflection unit comprising the steps of the manufacturing method described. 31. Assembling the wound magnetic core assembly and the first deflection coil assembly includes the step of attaching a first pair of saddle coils to the inner surface of the conical support and attaching the wound magnetic core to the outer surface of the support. The manufacturing method according to claim 29. 32. The method of claim 29, wherein the first deflection coil assembly is bonded to the wound magnetic core. 33, having first and second deflection coil assemblies used to respectively deflect an electron beam of a cathode ray display tube, the first and second deflection coil assemblies having first and second saddle coil pairs, respectively; In a method for manufacturing an electromagnetic deflection unit in which each saddle coil is formed by a conductive pattern on an assembled insulating film, (i) each saddle coil has a predetermined conductivity in each portion for each of the plurality of layers; A generally U-shaped flaky first portion and a flaky second portion are made from an insulating film having a magnetic pattern; The first and second portions of one of the second pair of saddles have the same shape as the first and second portions of the other pair of saddles, respectively, and the first and second portions of one of the second pair of saddles have the same shape as the first and second portions of the other pair of second saddles, respectively. (ii) For each saddle coil of each saddle coil pair, bend the first part so as to spread it out in a morning glory shape, and bridge the end of the first part with the second part, The transverse leg and the flared side legs form the gun side end and side member of the layer of saddle coils, respectively, while the second portion forms at least the screen side end of the layer of saddle coils, and the second portion forms at least the screen side end of the layer of saddle coils. (iii) assembling the first and second parts such that the conductive pattern provides the desired interconnection between the ends of the first part; are then positioned diametrically opposite each other, and then the layers thus formed are positioned diametrically opposite each other for each of the second saddle coil pairs, and each layer of the first saddle coil pair is then positioned diametrically opposite each other. is 9 for the second saddle coil pair.
(iv) adhering the layers of the first and second saddle pairs to each other such that they are offset by 0° and the layers of the first pair of saddles are interposed between the layers of the second pair of saddles; (v) providing the required electrical connections between the layers of the saddle coil pairs and between each pair of saddle coils to form first and second deflection coil assemblies; and (v) locating a magnetic core around the assembly of saddle coil pairs to provide electromagnetic deflection. A method for manufacturing an electromagnetic deflection unit, comprising the step of forming the unit. 34, in each part of each layer, between the layers, the first and second
33. The method of claim 32, wherein positioning holes are provided between the deflection coil assemblies for providing the required positioning.