JP2000067778A - Deflection yoke device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce variation of a deflection coil to resolve generation of XV cross mis-convergence in a deflection yoke device. SOLUTION: Winding of a wire is started from one electron-gun side cross wire part 11a, is advanced through one longitudinal direction part 10, one fluorescent-screen side cross wire part 11b, the other longitudinal part 10, the other electron-gun side cross wire part 11a, the one longitudinal direction part 10, the other fluorescent-screen side cross wire part 11b, and the other longitudinal direction part 10, and is repeated in this order. Accordingly, in the case of two vertical deflection coil groups connected in series to each other, connection such as connecting and soldering of respective wires of the two deflection coil groups to a terminal is not required. In the case of two horizontal deflection coil groups connected in parallel to each other, no slight difference caused by a production lot of the wire occurs so that the two deflection coil groups show an equal static characteristic, because the two deflection coil groups are simultaneously manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke device to be combined with a funnel-shaped cathode ray tube device used for a television receiver or the like.

[0002]

2. Description of the Related Art In recent years, cathode ray tube apparatuses have been widely used such as television receivers and monitoring monitors. Hereinafter, a conventional cathode ray tube device will be described.

FIG. 9 is a half side view of a conventional cathode ray tube device.
FIG. 10 is a half side view of the deflection yoke device, FIG. 11 is a diagram of the saddle type coil, FIG. 12 is an explanatory view of a method of installing the horizontal deflection coil, and FIG. 13 is an explanatory view of a method of installing the vertical deflection coil. 14 is a wiring diagram of the vertical deflection coil, FIG. 15 is a wiring diagram of the horizontal deflection coil, and FIG. 16 is a screen view of a cathode ray tube having misconvergence caused by a difference in inductance between the upper and lower coils.

As shown in FIG. 9, a cathode ray tube device is generally funnel-shaped, and has an electron gun 1 at its root and a fluorescent screen 2 at its converging portion. Further, a bosh-shaped deflection yoke device 3 is installed near the base thereof, and an electron beam 4 emitted from the electron gun 1 is vertically moved by a vertical deflection coil 5 by a deflection magnetic field generated by the deflection yoke device 3.
The electron beam 4 is deflected in the left-right direction by the horizontal deflection coil 6, reaches the phosphor screen 2 via the shadow mask, and an image is projected by the locus of the electron beam.

[0005] The deflection yoke device 3 thus used will be described below. FIG. 10 shows the deflection yoke device 3.
FIG. As shown in this figure, in the deflection yoke device, a horizontal deflection coil 6 is installed at the innermost side, a vertical deflection coil 5 is incorporated outside the horizontal deflection coil 6, and a core 7 is arranged so as to cover the vertical deflection coil 5.

[0006] The horizontal deflection coil 6 arranged in this way,
As shown in FIG. 11, the vertical deflection coil 5 generally has two longitudinal portions 10 and two crossover portions for connecting the longitudinal portions, ie, the electron gun side 11a and the fluorescent screen side 11b. It is configured by winding an electric wire and forming a saddle shape. Further, the saddle-shaped coil thus configured is
In the case of a horizontal deflection coil, they are installed vertically, as shown in FIG. 12, and in the case of a vertical deflection coil, FIG.
It is installed in the left-right direction as shown at

FIG. 14 shows a wiring diagram arranged in this way, in the case of a vertical deflection coil. As described above, the deflection coils divided into two groups have their lead wires 12 tied to a terminal or the like provided in the deflection yoke device, soldered thereon, connected in series with the two groups of deflection coils, and connected to a deflection power supply. Connected and supplied with a deflection current. In the case of a horizontal deflection coil, as shown in FIG. 15, the connection is parallel connection, and the power supply circuit is an equal voltage circuit when viewed from the deflection yoke device.

When wiring is performed in this manner, the production of the deflection coil is devised so as to produce the same coil without variation. However, for example, the variation of the wire to be wound, the temperature of the winding jig at the time of winding, etc. However, the coils do not always have the same resistance and inductance as the static characteristics of the coil.

Therefore, the upper and lower second coils may not be the same and may be different from each other. If, for example, a difference occurs in inductance between the coils arranged above and below, the amount of deflection current flowing through the two groups of coils, that is,
The deflection magnetic field becomes different, and as a result, as shown in FIG. 16, XV cross miss convergence, Re
The trajectory of the d electron beam does not coincide with the horizontal line of the trajectory of the Blue electron beam at the center of the screen, and as a result, a cathode ray tube screen having a color shift on the screen that does not coincide with the periphery of the screen is obtained.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned conventional problems, and eliminates the connection portions of the series-connected vertical deflection coils and the identity of the parallel-connected horizontal deflection coils. Therefore, it is an object of the present invention to provide a deflection yoke device capable of reducing variation in deflection coils and eliminating occurrence of XV cross miss convergence.

[0011]

SUMMARY OF THE INVENTION The present invention has a funnel shape,
A deflection yoke device formed in a bosh shape attached to a cathode ray tube in which an electron gun is disposed at a root and a fluorescent screen is disposed in a converging portion, wherein a saddle-shaped coil is divided into two parts, Start winding the wire from one crossover part of one part, one longitudinal part, the other crossover part, the other longitudinal part, then one crossover part of the other part, one longitudinal direction The deflection yoke device is characterized in that the deflection yoke device is continuously wound in this order in the order of a part, the other crossover part, and the other longitudinal part.

With this configuration, it is possible to realize a deflection yoke device which can reduce the variation of the deflection coil and eliminate the occurrence of the XV cross-misconvergence.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is formed in a funnel shape, which is attached to a cathode ray tube having a funnel shape, an electron gun disposed at the base, and a fluorescent screen disposed at a converging portion. Deflecting yoke device, wherein the saddle-shaped coil is divided into two parts, and the electric wire is started to be wound from one of the crossover portions of one of the parts, one longitudinal direction portion, the other crossover portion, and the other. A deflection yoke device characterized by being continuously wound in this order in the longitudinal direction, then one crossover part of the other part, one longitudinal direction part, the other crossover part, and the other longitudinal direction part. is there.

With this configuration, in the case of a vertical deflection coil in which deflection coils are connected in series, the two groups of deflection coils do not need to be connected to a terminal and connected by soldering or the like. In the case of a horizontal deflection coil, since two groups of deflection coils are produced simultaneously, there is no small difference between the production lots of electric wires, and there is no possibility that static characteristics will be the same.
The occurrence of XV cross miss convergence on the cathode ray tube screen is eliminated.

According to a second aspect of the present invention, the winding of the electric wire is bent in the shape of a bosh to form a coil into a desired shape, and two flange-shaped protrusions are provided on the fluorescent screen side and the electron gun side. An electric wire was wound around the bobbin using a plastic winding frame having a connecting wire portion formed so as to be sandwiched between the bobbin, and the electron gun side was constituted by a plurality of bridging portions with two or more bridging portions.

According to a third aspect of the present invention, a part of a flange portion for forming a crossover portion on the electron gun side of the bobbin is cut out,
The electric wires are crossed and wound through the notch.

According to this configuration, in a deflection yoke device in which an electric wire is directly wound around a plastic bobbin for forming a deflection coil, it is easy to intersect the electric wires when continuously winding two groups of deflection coils. And reliability can be ensured.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the same components as those described in the related art are denoted by the same reference numerals and description thereof will be omitted.

(Embodiment 1) FIG. 1 is a basic view of a winding procedure of a deflection coil according to Embodiment 1 of the present invention, and FIG. 2 is an explanatory view of the actual winding method. In FIG. 1, a method of winding a wire once, which is called a single-turn winding,
In practice, this single winding is repeated a prescribed number of times (generally about 20 to 100 rotations for a horizontal deflection coil and about 60 to 200 for a vertical deflection coil) to form a deflection coil. Note that the deflection coil of the present invention has a substantially double-sided symmetric shape with the horizontal axis 13 and the vertical axis 14 in this figure as symmetry axes.

This figure will be described below. First, the winding start position of the electric wire is started from the point S, and the electric wire is rotationally wound in an arc around the right half a circumference so as to form the electron gun side crossover portion 11a. At the point P1 where the arc-shaped winding is completed, the electric wire is substantially linearly moved to P2 so as to form the longitudinal portion 10 next.
Up to the point. At the point P2 where the formation of the longitudinal portion 10 is completed, the process proceeds to the formation of the fluorescent screen side crossover portion 11b. That is, it is wound in a circular arc around the left half turn. Next, at a point P3 at which the rotary winding is completed, the electric wire is introduced to P4 in a direction opposite to the direction in which the electric wire is introduced substantially straight from P1 to P2. The point P4 and the point S where the electric wire is started are close to each other (approximately 2 to 6 mm), but are not the same point. Hereinafter, similar winding is repeated with the horizontal axis 13 as a plane of symmetry.

That is, the wire is wound in an arc-shaped counterclockwise rotation from P4 to P5. Next, an electric wire is introduced to P6 in a substantially straight line so as to form a longitudinal portion from P5. Next, P4
The wire is wound clockwise in the opposite direction to the arc-shaped winding portion from P5 to P5 to form the fluorescent screen side bridging portion 11b. At the point P7 where the formation of this portion has been completed, the electric wire is introduced in the opposite direction to the formation of the linear portion from P5 to P6, and the wire is led to P8. The points P8 and P4 may be the same in the present invention. Then, from the last P8 to the winding start point S, the winding is completed once, and the winding is completed. As described above, after the winding is completed, the single-turn winding of the present invention is plane-symmetric with respect to the horizontal axis 13 and the vertical axis 14 as described above.

Next, a method of winding an actual coil according to the winding method of the present invention will be described with reference to the horizontal deflection coil shown in FIG. First, the electron gun-side crossover portion 11 of the horizontal deflection coil disposed above the electric wire from the start position S to P1.
a is formed. Next, a left longitudinal portion 10 of the horizontal deflection coil similarly arranged on the upper side is formed by the linear portion from P1 to P2. Next, by using P3 from P2, the crossover portion 1 on the phosphor screen side is used.
1b is formed. Next, the right longitudinal portion 10 of the horizontal deflection coil arranged on the upper side is formed by the straight line portion from P3 to P4. When the following operation is performed with the horizontal axis 13 as a plane of symmetry, a horizontal deflection coil arranged on the lower side is formed. That is, in the horizontal deflection coil arranged on the lower side, the electron gun side crossover portion 11a is formed by P4 and P5, the right longitudinal portion 11 is formed by P5 and P6, and the phosphor screen is formed by P6 and P7. The side crossover portion 11b is formed, the left longitudinal portion 10 is formed between P7 and P8, and the single turn winding of the present invention is completed.

(Embodiment 2) FIG. 3 is an external view of a bobbin of a plastic winding frame according to Embodiment 2 of the present invention.
FIG. 4 is an external view of the bobbin in which a wire is wound to form a deflection coil, FIG. 5 is a cross-sectional view of the bobbin, FIG. 6 is a partially enlarged view of the bobbin, and FIG. Diagram,
FIG. 8 is a circuit diagram of the deflection yoke device. In the second embodiment, a bobbin is a plastic winding frame formed by bending in a bosh shape to form a coil in a shape intended for winding an electric wire, and 15 is a portion bent in a bosh shape. Yes, 16 is a flange projection. FIG. 4 shows an embodiment of a deflection yoke device in which the electric wire 17 is wound around the bobbin.

FIG. 5 is a sectional view of FIG. 4 for explaining the appearance of the flange projection. As shown in this drawing, in the second embodiment, since the electron gun-side crossover portion has a two-stage configuration, the flange projections forming the crossover portion are formed of two steps.
It has a sheet (16a1 and 16a2) configuration.

The manner in which the flange projection winds the electric wire 17 around the two bobbins will be described below. That is, when the electric wire moves from the upper horizontal deflection coil to the lower horizontal deflection coil in the winding process, as shown in FIG.
The two flange protrusions are used at the point where the electric wire moves and the point where the electric wire moves from P8 to the point S.

FIG. 3 is a partially enlarged view of a bobbin with respect to a portion where the following electric wires move. This will be described with reference to FIG. In FIG. 6, the deflection coil rotates 90 degrees, 18 is an upper horizontal deflection coil, and 19 is a lower horizontal deflection coil. Also,
Reference numeral 20 denotes a flange cutout. That is, the notch 20
Are disposed at the center of both the upper horizontal deflection coil and the lower horizontal deflection coil. A method of winding an electric wire around the upper horizontal deflection coil on the bobbin configured as described above and then moving the electric wire to the lower horizontal deflection coil will be described with reference to FIG.

First, from (1), the electric wire 17 is introduced into the bobbin via the upper notch 20 of the upper horizontal deflection coil into the bobbin, and is turned clockwise (2) so as to form a crossover part on the electron gun side. Wind to a point. From the point (2), the coil is wound along the longitudinal direction portion 10 of the deflection coil. On the extension (3) of the longitudinal direction portion, there is a crossover portion on the phosphor screen side. Next, the electric wire that has finished winding around the crossover portion on the phosphor screen rises to the crossover portion on the electron gun side along the longitudinal direction (4). The wire that has risen to the crossover portion on the electron gun side in (5) is wound clockwise until (6) so as to form the crossover portion on the electron gun side. Next, in (6), an electric wire is inserted between the two flange protrusions,
After passing through (7), the lower horizontal deflection coil is introduced into (8) via the upper flange notch, and then wound counterclockwise to (9) so as to form a crossover portion on the electron gun side. I do. From (9), this is introduced into (10) so as to constitute the longitudinal direction portion of the lower horizontal deflection coil. On the extension of (10), there is a crossover part on the phosphor screen side. The electric wire which has finished winding the crossover portion on the phosphor screen returns to the crossover portion on the electron gun side at the position (11). From (11), the electric wire is wound counterclockwise again, and the winding is completed once. (12) is the end of the wire after the single winding.

As described above, in the embodiment, the winding direction of the crossover portion is set to the right rotation, and the winding direction of the transition portion of the vertical deflection coil is set to the left rotation. However, the same effect can be obtained even if the winding direction of the crossover portion is rotated leftward and the winding direction of the transition portion of the vertical deflection coil is rotated rightward. That is clear.

FIG. 8 shows a circuit diagram of the present invention wound in this manner. 21 in this figure is a single turn coil. That is, in the past, a parallel circuit (mainly connection of horizontal deflection coils) or a series circuit (mainly connection of vertical deflection coils) was used. In the deflection coil of the present invention, as shown in FIG. Upper and lower coils are provided for each coil, that is, for each winding.

This is because, for example, in order to obtain parallel inductance, it is necessary to obtain four times the number of turns (number of times of one turn) of series connection in order to obtain inductance at both ends. In the case of series connection, different voltages are applied to the upper and lower coils due to the voltage drop of the upper and lower coils, As a result, the distributed capacitance of the coil is different, and it is possible to prevent the occurrence of ringing of a vertical stripe pattern on the cathode ray tube screen due to series-parallel resonance between the distributed capacitance and the inductance of the deflection coil.

[0031]

As described above, according to the present invention, in the case of a vertical deflection coil in which deflection coils are connected in series, the two groups of deflection coils are connected to a terminal and connected by soldering or the like. In the case of horizontal deflection coils connected in parallel, two groups of deflection coils are produced at the same time, so that there is no minute difference between production lots of electric wires, and static characteristics may not be the same. Therefore, the occurrence of XV cross miss convergence on the cathode ray tube screen can be eliminated. Further, in the structure of a deflection yoke device in which an electric wire is directly wound around a plastic bobbin for forming a deflection coil, two continuous
Facilitates crossing of wires when winding a group of deflection coils,
And reliability can be ensured.

[Brief description of the drawings]

FIG. 1 is a basic diagram of a winding procedure of a deflection coil according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of an actual winding method according to the first embodiment of the present invention.

FIG. 3 is an external view of a bobbin of a plastic winding frame according to Embodiment 2 of the present invention.

FIG. 4 is an external view of a bobbin according to a second embodiment of the present invention, in which an electric wire is wound to form a deflection coil.

FIG. 5 is a sectional view of a bobbin according to a second embodiment of the present invention.

FIG. 6 is a partially enlarged view of a bobbin according to a second embodiment of the present invention.

FIG. 7 is a diagram showing a state in which an electric wire is wound around a bobbin according to the second embodiment of the present invention.

FIG. 8 is a circuit diagram of a deflection yoke device according to a second embodiment of the present invention.

FIG. 9 is a half-cut side view of a conventional cathode ray tube device.

FIG. 10 is a half-cut side view of a conventional deflection yoke device.

FIG. 11 is a diagram showing a shape of a conventional saddle coil.

FIG. 12 is an explanatory view of a conventional method of installing a horizontal deflection coil.

FIG. 13 is an explanatory view of a conventional method of installing a vertical deflection coil.

FIG. 14 is a wiring diagram of a conventional vertical deflection coil.

FIG. 15 is a wiring diagram of a conventional horizontal deflection coil.

FIG. 16 is a screen view of a conventional cathode ray tube having misconvergence caused by a difference in inductance between upper and lower coils.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electron gun 2 Phosphor screen 3 Deflection yoke device 4 Electron beam 5 Vertical deflection coil 6 Horizontal deflection coil 7 Core 8 Terminal plate 9 Terminal 10 Longitudinal section 11 Crossover section 11a Electron gun side crossover section 11b Phosphor screen side crossover section DESCRIPTION OF SYMBOLS 12 Lead wire 13 Horizontal axis 14 Vertical axis 16 Flange projection 17 Electric wire 18 Upper horizontal deflection coil 19 Lower horizontal deflection coil 20 Flange notch 21 Single winding coil

Claims (3)

[Claims] 1. A deflection yoke device formed in a funnel shape and attached to a cathode ray tube having a funnel shape, an electron gun disposed at a base, and a phosphor screen disposed at a converging portion, comprising a saddle type. The shape coil is divided into two parts, and the electric wire is started to be wound from one crossover part of one part, one longitudinal part, the other crossover part, the other longitudinal part, and then the other part. A deflecting yoke device characterized in that it is wound continuously in the order of one crossover portion, one longitudinal portion, the other crossover portion, and the other longitudinal portion. 2. A crossover so that the winding of the electric wire is bent like a bosh to form a coil in a desired shape, and is sandwiched between two flange-shaped protrusions on the fluorescent screen side and the electron gun side. 2. An electric wire is wound around a bobbin using a plastic winding frame having a portion formed thereon, and the electron gun side is constituted by a plurality of bridging portions with two or more flange portions. The deflection yoke device according to claim 1. 3. A bobbin, wherein a part of a flange for forming an electron gun-side crossover portion of the bobbin is cut out, and electric wires are crossed and wound through the cutout. 3. The deflection yoke device according to 2.