JP3025077B2 - Deflection yoke and color cathode ray tube device constituted by the deflection yoke - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke comprising a horizontal deflection coil and a vertical deflection coil wound around a main magnetic core for use by being attached to a color cathode ray tube for generating an in-line array of multi-electron beams. The present invention relates to a color cathode ray tube device including a deflection yoke, and more particularly, to a deflection yoke including an auxiliary magnetic core wound with an auxiliary vertical deflection coil as a convergence adjusting means, and a color cathode ray including the deflection yoke. It relates to a pipe device.

[0002]

2. Description of the Related Art As a first conventional device relating to a deflection yoke provided with convergence adjusting means, Japanese Utility Model Laid-Open Publication No.
As described in JP-A-153759, misconvergence between vertical lines displayed on a display screen (hereinafter, simply referred to as a screen) by electron beams at both ends of a multi-electron beam in an in-line arrangement is caused by the upper and lower halves of the screen. An individual adjustment is known, which is configured by connecting a diode, a variable resistor, and a correction coil for generating a quadrupole magnetic field.

As a second conventional device, an auxiliary vertical deflection coil for flowing a vertical deflection current is provided on the electron gun side of a deflection yoke as described in Japanese Patent Application Laid-Open No. 63-143727. In preparation for the magnetic material, an auxiliary vertical deflection magnetic field is generated, and a bridge circuit is built with a part of the auxiliary coil and a variable resistor. The cross-shaped misconvergence is corrected.

[0004]

In the first prior art, the arcuate misconvergence between the vertical lines projected on the screen by the electron beams at both ends can be corrected, but the auxiliary vertical which contributes to the correction of pincushion distortion and coma aberration. It did not generate a deflecting magnetic field.

In the second prior art, a cross-shaped misconvergence between vertical lines displayed on a screen by an electron beam at both ends is corrected, and an auxiliary vertical deflection magnetic field which contributes to pincushion distortion and coma aberration is corrected. Although it occurs, it does not correct the bow-shaped misconvergence between the vertical lines projected on the screen by the electron beams at both ends.

By the combination of the above-mentioned conventional techniques, generation of an auxiliary vertical deflection magnetic field contributing to correction of pincushion distortion and coma aberration and correction of arcuate misconvergence between vertical lines projected on a screen by electron beams at both ends can be achieved at the same time. In order to make this possible, it is necessary to provide an auxiliary vertical deflection coil and another correction coil for generating a quadrupole magnetic field on the magnetic body provided on the electron gun side of the deflection yoke, which complicates the structure and increases the manufacturing cost. There was a problem of doing.

The present invention reduces the number of coils by generating an auxiliary vertical deflection magnetic field contributing to correction of pincushion distortion and coma aberration, and correcting arcuate misconvergence between vertical lines projected on a screen by electron beams at both ends. Is realized by providing
It is an object of the present invention to provide a deflection yoke capable of simplifying the structure and reducing the manufacturing cost, and a color cathode ray tube device including the deflection yoke.

[0008]

In order to achieve the above-mentioned object, a deflection yoke according to the present invention comprises a magnetic yoke having a main magnetic core wound with a horizontal deflection coil and a vertical deflection coil, and a magnetic yoke. the secondary magnetic core composed of a body disposed at least a first auxiliary vertical deflection coil and a second auxiliary vertical deflection coils provided in sub magnetic core, said first and second
The auxiliary vertical deflection coils with respectively connected to the vertical deflection coils, which are connected to shunt circuit to each of the first and second auxiliary vertical deflection coils in parallel or in series.

[0009]

Each of the first auxiliary vertical deflection coil and the second auxiliary vertical deflection coil has a vertical magnetic field component which is directed to each other on a horizontal central axis coinciding with the axis on which the multiple electron beams are arranged. The magnetic field components are generated so as to have different directions, and the horizontal magnetic field components are generated such that the respective directions are the same as each other.

Further, by the action of a shunt circuit connected in parallel or series to each of the first and second auxiliary vertical deflection coils, for example, when the shunt circuits are connected in parallel, the upper half of the screen First equivalent to deflecting
Relative polarity of the vertical deflection current, since only the first diode of the auxiliary vertical deflection shunt circuit connected in parallel to the coil is conductive, the current flowing through the first auxiliary vertical deflection coils, the second auxiliary vertical It is smaller than the current flowing through the deflection coil.

As a result, the first auxiliary vertical deflection coil and the
Of the magnetic fields generated by both of the two auxiliary vertical deflection coils, the direction of the vertical magnetic field component near the horizontal center axis coincides with the direction of the vertical magnetic field component generated only by the second auxiliary vertical deflection coil. .

Meanwhile, with respect to the first polarity and opposite polarity of the vertical deflection current that corresponds to the case to deflect the lower half of the screen, the
Since only the diode of the shunt circuit connected in parallel to the two auxiliary vertical deflection coils conducts, the current flowing through the second auxiliary vertical deflection coil is smaller than the current flowing through the first auxiliary vertical deflection coil.

As a result, the first auxiliary vertical deflection coil and the
Of the magnetic fields generated by both of the two auxiliary vertical deflection coils, the direction of the vertical magnetic field component near the horizontal center axis matches the direction of the vertical magnetic field component generated only by the first auxiliary vertical deflection coil. .

In consideration of the polarity of the current, the magnetic field generated on the horizontal center axis by both the first auxiliary vertical deflection coil and the second auxiliary vertical deflection coil is different between the case where the upper half surface of the screen is deflected and the case where the lower half surface is deflected. Is deflected, the direction becomes the same, so that the bow-shaped misconvergence between the vertical lines projected on the screen by the electron beams at both ends can be corrected.

On the other hand, by combining horizontal magnetic field components having the same direction on a horizontal central axis generated by each of the first auxiliary vertical deflection coil and the second auxiliary vertical deflection coil,
It has the function of forming an auxiliary vertical deflection magnetic field. Therefore, pincushion distortion and coma aberration can be changed by the effect of the auxiliary vertical deflection magnetic field.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a side surface of a deflection yoke as a first embodiment of the present invention, and FIG. 2 is a rear view showing a back surface of the deflection yoke of FIG.

In each of the drawings, reference numeral 1 denotes a deflection yoke, 2 denotes a horizontal deflection coil, 3 denotes a vertical deflection coil, 4 denotes a main magnetic core made of a magnetic material, 5 denotes a separator made of an insulator, and 6 denotes a magnetic material. Ring-shaped sub-magnetic core having radial projections 6a to 6h, 7a to 7f are vertical deflection coils 3
, An auxiliary vertical deflection coil (to be simply referred to as an auxiliary vertical deflection coil 7 when collectively referred to as 7a to 7f), 8 is an electron gun side, 9 is a static convergence magnet, 10 is a color cathode ray tube, 21 is an electron gun , 19 are fluorescent screens.

In this embodiment, both the horizontal deflection coil 2 and the vertical deflection coil 3 are formed in a saddle shape. Further, a main magnetic core 4 made of a magnetic material is arranged on the outer circumference of the deflection coils 2 and 3. A sub magnetic core 6 is disposed on the electron gun side 8 of the deflection yoke 1, and radial projections 6 on the horizontal axis and diagonal axis of the sub magnetic core 6 are provided.
The auxiliary vertical deflection coils 7a, 7b, 7c, 7d, 7e, and 7f are wound around a, 6b, 6c, 6d, 6e, and 6f to form the auxiliary vertical deflection coil 7.

Next, FIG. 3 is a connection diagram showing a connection state in the deflection yoke of FIG. In FIG. 3, HDC is a horizontal deflection circuit, and VDC is a vertical deflection circuit. further,
In the present embodiment, as shown in FIG. 3, the auxiliary vertical deflection coils 7 (7a to 7f) are connected in series or in parallel with the vertical deflection coils 3 (the case where they are connected in series is shown in the figure). The vertical deflection current Iv is supplied, and the auxiliary vertical deflection coils (7c, 7f: 7d, 7d, 7d,
7e), the upper coils 7c and 7d located on the upper side with respect to the horizontal axis are connected in parallel with a shunt circuit composed of a series circuit of a diode 12a for blocking a current in the first direction, a resistor 22b, and a variable resistor 23b. It is connected to the.

The lower coils 7e and 7f positioned on the lower side with respect to the horizontal axis among the auxiliary vertical deflection coils (7c and 7f: 7d and 7e) positioned on the diagonal axis are connected to the first coils. Is connected in parallel with a shunt circuit composed of a series circuit of a diode 12b for blocking a current in a direction opposite to the above direction, a resistor 22c and a variable resistor 23c.

Further, a parallel circuit of a pair of diodes 12c having opposite polarities and a resistor 22d are connected in series between the upper coils 7c and 7d and the lower coils 7e and 7f. On the other hand, the variable inductor 11 connected to the horizontal deflection coil 2 and the resistor 22a and the variable resistor 23a connected to the vertical deflection coil 3 are means usually provided for adjusting the balance between the coils 2 and 3.

FIG. 4 is a sectional view showing a section of the auxiliary vertical deflection coil in the deflection yoke of FIG. It is assumed that the direction in which the vertical deflection current Iv flows when deflecting the upper half surface of the screen is the direction shown by the arrow Y1 direction in FIG. 3, and conversely, the direction in which the vertical deflection current Iv flows when deflecting the lower half surface of the screen is: FIG.
4A shows the magnetic field 13a generated by the auxiliary vertical deflection coils 7 (7a to 7f) of the present embodiment when the upper half surface of the screen is deflected, and FIG. 4B shows a magnetic field 13b generated by the auxiliary vertical deflection coils 7 (7a to 7f) of the present embodiment when the lower half surface of the screen is deflected.

In the case of FIG. 4A, the vertical deflection current Iv flows in the direction of the arrow Y1 in FIG. 3 when the upper half surface of the screen is deflected, so that the conduction of the diode 12a shown in FIG. The vertical deflection current flowing in the vertical coils 7c and 7d is divided and reduced, and the magnetic field generated by the upper coils 7c and 7d is reduced by the lower coils 7e and 7 that do not generate the vertical deflection current.
f, which is weaker than the magnetic field generated by f.
a has a shape curved upwardly convexly. As a result, the center electron beam 14G receives a large deflection force 15 upward, and the electron beams 14R, 14B at both ends receive a deflection force 15 in which a slightly smaller force and a horizontal force are combined.

Also, in the case of FIG. 4B, when the lower half surface of the screen is deflected, the vertical deflection current Iv is increased by the arrow Y in FIG.
Since the current flows in two directions, the diode 12b shown in FIG.
, The vertical deflection current flowing through the lower coils 7e and 7f is shunted and reduced, and the magnetic field generated by the lower coils 7e and 7f is reduced by the upper coil 7 that does not generate the vertical deflection current shunt.
The magnetic field 13b in the vicinity of the horizontal axis is weaker than the magnetic fields generated by c and 7d, and has a shape that is convexly curved downward. As a result,
The center electron beam 14G receives a large deflection force 15 downward,
The electron beams 14R, 14B at both ends receive a deflection force 15, which is a combination of a slightly lower force and a horizontal force.

FIGS. 6 (a), 6 (b) and 6 (c) show misconvergence patterns on the screen which can be corrected by the present embodiment. FIG. 6 (a) shows the electron beam 14R at both ends in the arrangement shown in FIG. , 14B caused by vertical lines 17R, 17B
It shows misconvergence between and is commonly referred to as arcuate misconvergence. FIG. 6B shows the pincushion distortion of the horizontal line raster. FIG. 6C shows an electron beam 14 at both ends.
The misconvergence between the horizontal line rasters 18R and 18B caused by R and 14B and the horizontal line raster 18G caused by the center electron beam 14G having the arrangement shown in FIG. 4 is generally called coma.

The magnetic field 13a at the time of deflection of the upper half surface of the screen shown in FIG. 4A is the same as the magnetic field 13c shown in FIGS. 5A and 5B.
13d corresponds to a composite of 13d. The magnetic field 13c is a normal auxiliary vertical deflection magnetic field, and includes a uniform magnetic field component 13e shown in FIG. 5C and a six-pole non-uniform magnetic field component 13 shown in FIG.
This corresponds to a combination of f.

As is conventionally known, the pincushion distortion shown in FIG. 6B can be corrected by the uniform magnetic field component 13e, and the pincushion distortion shown in FIG.
Can be corrected. FIG.
The quadrupole magnetic field 13d shown in FIG. 6B has the function of correcting the bow-shaped misconvergence shown in FIG. Therefore, by combining these, an operation unique to the present embodiment can be obtained.

In FIG. 3, a pair of parallel-connected diodes 12c having opposite polarities is a diode 12c.
This is to generate a potential difference required for a or 12b to conduct (turn on). Further, the resistors 22b and 22
c and 22d are for determining the maximum correction amount of the arcuate misconvergence shown in FIG.
The maximum correction amount increases as the resistance value of the resistor 22c decreases and the resistance value of the resistor 22d increases.

Further, the variable resistors 23b and 23c shown in FIG.
As a result, since the arcuate misconvergence between the upper half screen and the lower half screen can be adjusted independently, it is possible to correct the arcuate misconvergence having different values between the upper half screen and the lower half screen as shown in FIG. is there.

FIG. 7 is a connection diagram showing a connection state in a deflection yoke as a second embodiment of the present invention. The connection on the side of the vertical deflection coil 3 is different from that shown in FIG. In FIG. 7, components having the same functions as those in the first embodiment shown in FIG. 3 are denoted by the same reference numerals.

In this embodiment shown in FIG. 7, a horizontal deflection coil 2 and a variable inductor 11 are connected to a horizontal deflection circuit HDC as in the first embodiment shown in FIG. The variable inductor 11 is a means usually provided for adjusting the balance of the current flowing through the horizontal deflection coil 2.

In the vertical deflection circuit VDC, the vertical deflection coil 3, the auxiliary vertical deflection coils 7 (7a to 7f) and the resistor 22d are connected in series to supply a vertical deflection current Iv. The vertical deflection coil 3 includes a resistor 22
a and the variable resistor 23a are connected so that the balance of the current flowing through the vertical deflection coil 3 can be adjusted.

In the present embodiment shown in FIG. 7, unlike the first embodiment shown in FIG. 3, a parallel circuit of a pair of diodes 12c having opposite polarities is not connected in series with the resistor 22d,
It is connected in parallel to both ends of the resistor 22d.

In FIG. 7, the resistor 22d is for generating a potential difference required for the diode 12a or 12b to conduct (turn on). Further, the pair of diodes 12c connected in parallel with opposite polarities has an effect of reducing the loss generated in the resistor 22d. on the other hand,
Resistors 22b and 22c and variable resistors 23b and 23c
Is used to determine the correction amount of the bow-shaped misconvergence shown in FIG. 6A, and the correction amount increases as the resistance value decreases. For this reason, the bow-shaped misconvergence of the upper half surface of the screen and the lower half surface of the screen can be adjusted independently by the variable resistors 23b and 23c, and the bow having a different value between the upper half surface of the screen and the lower half surface of the screen as shown in FIG. Correction of shape misconvergence is possible.

FIG. 8 is a connection diagram showing a connection state in a main part of a deflection yoke as a third embodiment of the present invention. The connection on the vertical deflection coil 3 side is different from that shown in FIG. I have. In FIG. 8, components having the same functions as those in the first embodiment shown in FIG. 3 are denoted by the same reference numerals.

In the present embodiment shown in FIG.
c, 7d and the lower coils 7e, 7f are connected in parallel. The upper coils 7c and 7d include a diode 12b for blocking a current in a first direction, a series circuit of a variable resistor 23c and a resistor 22e, and a diode 12a for blocking a current in a direction opposite to the first direction. A circuit in which a series circuit of the resistor 22f is connected in parallel is connected in series.

On the other hand, the lower coils 7e and 7f have a diode 12b for blocking current in the first direction and a resistor 22f.
And a series circuit of a diode 12a, a variable resistor 23b, and a resistor 22e, which block a current in a direction opposite to the first direction, is connected in parallel.

The resistors 22e and 22 of each of the above circuits
f is shared by one resistor. Also in this embodiment, similarly to the first embodiment shown in FIG. 3, since the bow-shaped misconvergence of the upper half surface of the screen and the lower half surface of the screen can be adjusted independently by the variable resistors 23b and 23c, FIG. It is possible to correct an arcuate misconvergence having different values on the upper half screen and the lower half screen as shown in d). The resistors 22e and 22f act to determine the maximum correction amount of the arcuate misconvergence.

FIG. 9 is a connection diagram showing a connection state in a main part of a deflection yoke according to a fourth embodiment of the present invention. The connection on the vertical deflection coil 3 side is different from that shown in FIG. . In FIG. 9, components having the same functions as those of the first embodiment shown in FIG. 3 are denoted by the same reference numerals.

In this embodiment shown in FIG. 9, the upper coils 7c, 7c
d and the lower coils 7e and 7f respectively have a diode 12a for blocking a current in the first direction and a variable resistor 23.
3 in that a series circuit of a resistor b and a resistor 22b, and a series circuit of a diode 12b for blocking a current in a direction opposite to the first direction, a variable resistor 23c, and a resistor 22c are connected in parallel. Is different from the embodiment.

The variable resistors 23b and 23c and the resistors 22b and 22c in each of the above circuits are shared by a single component, but are formed of separate components so as to form a series circuit with the diodes 12a and 12b. May be.

In this embodiment, the variable resistors 23b and 23c
Of the upper coils 7c, 7
By making the current flowing through d equal to the current flowing through the lower coils 7e and 7f, the correction amount of the arcuate misconvergence shown in FIG. 6A can be made zero.

By moving the setting of the variable resistors 23b and 23c from the above-mentioned state, it is possible to correct an arbitrary arc-shaped misconvergence including the sign independently of the upper half screen and the lower half screen. . Therefore, FIG.
It is possible to correct the misconvergence between the vertical lines 17R and 17B having different signs and sizes on the upper half screen and the lower half screen as shown in FIG.

Correcting the misconvergence in FIG. 6E corresponds to simultaneously correcting the bow-shaped misconvergence shown in FIG. 6A and the cross-shaped misconvergence shown in FIG. .

FIG. 10 is a connection diagram showing a connection state in a main part of a deflection yoke as a fifth embodiment of the present invention. The connection on the vertical deflection coil 3 side is different from that shown in FIG. .

In the present embodiment shown in FIG.
The configurations of the variable resistors 23b and 23c and the resistors 22g and 22h connected to the switches a and 12b are different from those of the third embodiment shown in FIG.

By setting the variable resistor terminals of the variable resistors 23b and 23c at the middle point, the current flowing through the upper coils 7c and 7d and the current flowing through the lower coils 7e and 7f can be made equal. The correction amount of the bow-shaped misconvergence shown in a) can be set to zero.

Further, by moving the setting of the variable resistors 23b and 23c from the above state, it is possible to correct an arbitrary arc-shaped misconvergence including the sign independently of the upper half surface and the lower half surface of the screen. Therefore, FIG.
The misconvergence between the vertical lines 17R and 17B having different signs and sizes can be corrected between the upper half screen and the lower half screen as shown in FIG. The resistors 22g and 22h
Has the effect of determining the maximum correction amount by the variable resistors 23b and 23c and reducing the power consumption of the variable resistors 23b and 23c.

FIG. 11 is a connection diagram showing a connection state in a main part of a deflection yoke according to a sixth embodiment of the present invention. The connection on the vertical deflection coil 3 side is different from that shown in FIG. .

In this embodiment shown in FIG. 11, the upper coil 7c,
A first and second series circuit is formed by connecting a pair of diodes 12c and a resistor 22d that are connected in parallel with different polarities to each of 7d and the lower coils 7e and 7f.

The first series circuit including the upper coils 7c and 7d includes a diode 1 for blocking a current in a first direction.
2a, a series circuit including a variable resistor 23d and a resistor 22i is connected in parallel, and the second circuit including lower coils 7e and 7f is connected.
Is connected in parallel to a series circuit composed of a diode 12b for blocking a current in a direction opposite to the first direction, a variable resistor 23d, and a resistor 22i. Here, each of the variable resistor 23d and the resistor 22i of each circuit is shared by one component.

A variable resistor 23e is connected in parallel to both ends where the first series circuit and the second series circuit are connected in series, and a series circuit of a variable resistor 23f and a resistor 22k is connected in parallel. ing. Further, a resistor 22j is connected between a connection point between the first series circuit and the second series circuit and a variable resistor terminal of the variable resistor 23e.

In this embodiment shown in FIG. 11, the variable resistor 23d
By the adjustment, the bow-shaped misconvergence as shown in FIG. 6A can be corrected. Further, by adjusting the variable resistor 23e, the upper coils 7c and 7d and the lower coils 7e and 7f are adjusted.
6F, the cross-shaped misconvergence between the vertical lines 17R and 17B as shown in FIG. 6F can be corrected.

Further, the average value of the currents flowing through the upper coils 7c and 7d and the lower coils 7e and 7f can be changed by the variable resistor 23f, and the coma aberration as shown in FIG. can do. Variable resistor 2
The upper coils 7c and 7d are also used when correcting the arc-shaped misconvergence between the vertical lines 17R and 17B using 3d.
And the average value of the current flowing through the lower coils 7e and 7f changes, and coma as shown in FIG. 6C is generated.
This coma is corrected using the variable resistor 23f.

Note that the resistors 22j and 22k are provided for current limitation, and the same effects as described above can be obtained even if they are not provided. Also, the variable resistor 23f and the resistor 22k
Has the same effect as described above even if it is similarly connected to FIG. 3 or FIG.

FIG. 12 is a connection diagram showing a connection state of a main part of a deflection yoke according to a seventh embodiment of the present invention. The connection on the vertical deflection coil 3 side is different from that shown in FIG. .

In this embodiment shown in FIG. 12, a resistor connected in series with the auxiliary vertical deflection coils 7a, 7b, 7c, 7d, 7e, 7f is replaced with a plurality of resistors 22d- connected in series.
1, 22d-2, 22d-3, and the auxiliary vertical deflection coils 7c, 7d, 7e, 7f and the resistor 22d-1,
22d-2 and 22d-3 including diodes
A shunt circuit having a stage configuration is connected in parallel.

In the present embodiment shown in FIG.
2a-2 and 12b-2 are resistors 22d-1, 22d-
When the vertical deflection current Iv has a small value due to a voltage drop of 2,22d-3, conduction occurs, and the auxiliary vertical deflection coils 7c and 7c are turned on.
A shunt occurs in the current flowing through d, 7e, and 7f. On the other hand, the diodes 12a-1 and 12b-1 are connected to the resistor 22
Due to the voltage drops of d-1, 22d-2, and 22d-3, conduction occurs when the vertical deflection current Iv has a large value, and a shunt occurs in the current flowing through the auxiliary vertical deflection coils 7c, 7d, 7e, and 7f.

Therefore, the diodes 12a-2 and 12a-2
Variable resistors 23b-2 and 23c connected in series with b-2
-2, the arc-shaped misconvergence is corrected at the position where the vertical deflection amount is small, and the diodes 12a-1 and 12a are corrected.
Variable resistors 23b-1, 23c connected in series with b-1
With −1, the bow-shaped misconvergence can be corrected at a position where the vertical deflection amount is large, and accurate correction can be performed.

FIG. 13 is a rear view showing a rear surface of a deflection yoke as an eighth embodiment of the present invention, FIG. 14 is a cross-sectional view showing a cross section of a main part of the deflection yoke of FIG. 13, and FIG. 15 is a deflection yoke of FIG. 3 is a connection diagram showing a connection state in FIG. Components having the same functions as those shown in FIGS. 2, 4 and 9 are denoted by the same reference numerals.

This embodiment is different from the first embodiment in that the auxiliary magnetic core 6 is composed of two E-shaped magnetic members.
Are located on the upper side with respect to the horizontal axis.
And lower coils 7e and 7f located below the horizontal axis
2 and 4 is different from the configuration shown in FIGS. 2 and 4 in that it is different from the fourth embodiment shown in FIG.

In this embodiment, the difference in the shape of the auxiliary magnetic core 6 and the auxiliary vertical deflection coil 7
5A, the shape of the normal auxiliary vertical deflection magnetic field generated by the auxiliary vertical deflection coil 7 as shown in FIG. 5A changes, but the vertical line 17R as shown in FIG. , 17B are the same as those of the fourth embodiment shown in FIG.

FIG. 14 shows the variable resistor 23b adjusted so that the current flowing through the upper coils 7c and 7d is smaller than the current flowing through the lower coils 7e and 7f when the diode 12a is conducting in FIG. Shows the correction magnetic field 13a and the deflection force 15 acting on the electron beam.

FIG. 16 is a connection diagram showing a connection state in a main part of a deflection yoke according to a ninth embodiment of the present invention. The connection on the vertical deflection coil 3 side is different from that shown in FIG. .

The eighth embodiment shown in FIG. 16 is different from the eighth embodiment shown in FIG. 15 in that a parallel circuit of a pair of diodes 12c having opposite polarities is connected in parallel with the resistor 22d instead of in series. Different from the example.

In this embodiment, the eighth embodiment shown in FIG.
Similarly to the embodiment, the difference in the shape of the auxiliary magnetic core 6 and the absence of the coils 7a and 7b on the horizontal axis as the auxiliary vertical deflection coil 7 cause the auxiliary vertical deflection coil 7 to generate the signal shown in FIG. Although the shape of the normal auxiliary vertical deflection magnetic field changes as shown in FIG.
The effect of correcting misconvergence between R and 17B is
This is the same as the fourth embodiment shown in FIG.

FIG. 17 is a rear view showing a rear surface of a deflection yoke as a tenth embodiment of the present invention, FIG. 18 is a cross-sectional view showing a cross section of a main part of the deflection yoke of FIG. 17, and FIG. 19 is a deflection yoke of FIG. 3 is a connection diagram showing a connection state in FIG. Figure 2
Components having the same functions as those shown in FIGS. 4 and 12 are denoted by the same reference numerals.

The present embodiment differs from the configurations shown in FIGS. 2 and 4 in that the sub-magnetic core 6 is composed of two E-shaped magnetic bodies, and this point and the auxiliary vertical deflection coil ( 7c,
7d, 7e, 7f), a series circuit composed of upper coils 7c, 7d located above the horizontal axis and a resistor 22d, and a lower coil 7 located below the horizontal axis.
e, 7f and a resistor 22d,
It differs from the seventh embodiment shown in FIG. 12 in that two-stage shunt circuits including diodes are connected in parallel.

In this embodiment, the diode 12a-
2, 12b-2, the vertical deflection current Iv through the use of low device forward voltage V _F of such Schottky diode conducts when the smaller value, the auxiliary vertical deflection coils 7
A shunt occurs for the current flowing through c, 7d, 7e, 7f. On the other hand, the diode 12a-1 and 12b-1 are rendered conductive when a large value is a vertical deflection current Iv through the use of a high forward voltage V _F such as a silicon diode, the auxiliary vertical deflection coils 7c, 7d, 7e, A shunt occurs for the current flowing through 7f.

Therefore, the diodes 12a-2, 12a
Variable resistors 23b-2 and 23c connected in series with b-2
-2, the arc-shaped misconvergence is corrected at the position where the vertical deflection amount is small, and the diodes 12a-1 and 12a are corrected.
Variable resistors 23b-1, 23c connected in series with b-1
With −1, the bow-shaped misconvergence can be corrected at a position where the vertical deflection amount is large, and accurate correction can be performed.

In this embodiment, the auxiliary vertical deflection coils 7a, 7b, 7c, 7c are compared with the seventh embodiment shown in FIG. 12 in which two-stage shunt circuits are similarly connected in parallel.
There is no need to divide the resistor 22d that is connected in series with d, 7e, and 7f.

FIG. 20 is a rear view showing a rear surface of a deflection yoke as an eleventh embodiment of the present invention, FIG. 21 is a cross-sectional view showing a cross section of a main part of the deflection yoke of FIG. 20, and FIG. 3 is a connection diagram showing a connection state in FIG. FIG.
7, those having the same functions as those shown in FIGS. 18 and 19 are denoted by the same reference numerals.

In this embodiment, among the auxiliary vertical deflection coils, E
The upper coils 7c and 7d located on the upper side with respect to the horizontal axis of the V-shaped sub-magnetic core 6 are each divided into two, and one is left on the upper side to form coils 7c-1 and 7d-1, and the other is Moved down to coils 7c-2 and 7d-2,
Lower coils 7e, 7 positioned lower than the horizontal axis
f is divided into two, and one is left on the lower side to be coils 7e-1 and 7f-1, and the other is moved to the upper side to be coils 7e-2 and 7f-2, and the coils 7c-1 and 7c-1
17C-2, 7d-1, and 7d-2 are coils of a first set, and coils 7e-1, 7e-2, 7f-1, and 7f-2 are coils of a second set. In addition, the configuration is different from the configuration shown in FIG.

In the present embodiment, as shown in FIG.
Sets of coils 7c-1, 7c-2, 7d-1, 7d-2
A two-stage shunt circuit composed of a series connection of a diode 12a-1 and a resistor 22d and a series connection of a diode 12a-2 and a variable resistor 23d are provided for a series circuit composed of a resistor and a pair of resistors 22d. While connected in parallel, the second set of coils 7e-1, 7e-2, 7f-1, 7f-
For a series circuit consisting of 2 and a pair of resistors 22d,
A two-stage shunt circuit composed of a series connection of the diode 12b-1 and the resistor 22c and a series connection of the diode 12b-2 and the variable resistor 23c are connected in parallel.

In this embodiment, the diode 12a-
2, 12b-2, the vertical deflection current Iv through the use of low device forward voltage V _F of such Schottky diode conducts when the smaller value, the auxiliary vertical deflection coils 7
c-1, 7c-2, 7d-1, 7d-2, 7e-1, 7
A shunt occurs in the current flowing through e-2, 7f-1, 7f-2. On the other hand, diodes 12a-1 and 12b-1
Is rendered conductive when a large value is a vertical deflection current Iv through the use of a high forward voltage V _F such as a silicon diode, the auxiliary vertical deflection coils 7c-1,7c-2,
7d-1, 7d-2, 7e-1, 7e-2, 7f-1,
A shunt occurs for the current flowing through 7f-2.

Therefore, the diodes 12a-2 and 12a-2
The bow-shaped misconvergence is corrected as a whole by the variable resistors 23b and 23c in series with b-2, and the correction amount of the bow-shaped misconvergence at a position where the vertical deflection amount is large is corrected by the resistors 22b and 22c. This allows accurate correction.

The auxiliary vertical deflection coils 7c-1 and 7c
−2, 7d-1, 7d-2, 7e-1, 7e-2, 7f
-1, 7f-2 and a pair of resistors 22d, a variable resistor 23 is connected between a pair of resistors 22e at both ends of the series circuit.
d are connected in series, and a variable resistor terminal of the variable resistor 23d is connected to a connection point of the pair of resistors 22d.

Therefore, by adjusting the variable resistor 23d, the first set of coils 7c-1, 7c-2, 7e
-1, 7e-2 and the second set of coils 7d-1, 7d-
The time-independent component of the ratio of the vertical deflection current flowing through 2, 7f-1, 7f-2 can be changed, and cross-like misconvergence between vertical lines as shown in FIG. 6F can be corrected.

In FIG. 21, any one of the coils 7c-1, 7c-2, 7e-1, 7e-2 of the first set and the protrusion of the sub-magnetic core 6 having the coil are arranged. The second set of coils 7d-1, 7d-2, 7f-
1,7f-2 are replaced with each other,
Alternatively, they may be arranged coaxially. In this case, by slightly changing the number of turns of the coil, it is possible to reduce misconvergence caused by a difference in the mounting position. Also, instead of using a high forward voltage V _F diodes, it may be used to connect the lower diode forward voltage V _F to the plurality of series.

FIG. 23 is a rear view showing a back surface of a deflection yoke as a twelfth embodiment of the present invention, FIG. 24 is a cross-sectional view showing a cross section of a main part of the deflection yoke of FIG. 23, and FIG. 3 is a connection diagram showing a connection state in FIG. Figure 2
Those having the same function as those shown in FIGS. 4 and 9 include:
They have the same numbers.

This embodiment is different from the first embodiment in that the auxiliary magnetic core 6 is composed of two U-shaped magnetic members.
Is composed of an upper coil 7g disposed between the protrusions 6c and 6d of the upper sub-magnetic core 6 and a lower coil 7h disposed between the protrusions 6e and 6f of the lower sub-magnetic core 6 on the vertical axis. However, it differs from the configuration shown in FIGS. 2 and 4 in that it differs from the fourth embodiment shown in FIG.

In this embodiment, due to the difference in the shape of the auxiliary magnetic core 6 and the difference in the configuration of the auxiliary vertical deflection coil 7, the normal auxiliary vertical deflection generated by the auxiliary vertical deflection coil as shown in FIG. Although the shape of the magnetic field changes, FIG.
The effect of correcting the misconvergence between the vertical lines 17R and 17B as shown in (e) is the same as that of the fourth embodiment shown in FIG.

FIG. 24 shows a state in which the current flowing through the upper coil 7g when the diode 12a is conducting in FIG.
7 shows the correction magnetic field 13a and the deflection force 15 acting on the electron beam when the variable resistor 11b is adjusted so as to be smaller than the current flowing through the lower coil 7h.

FIG. 26 is a rear view showing a rear surface of a deflection yoke according to a thirteenth embodiment of the present invention, and FIG. 27 is a cross-sectional view showing a main part cross section of the deflection yoke of FIG. 2 and 4
Those having the same functions as those shown in FIG. The connection state in this embodiment is shown in FIG.
Is the same as the connection state shown in FIG.

This embodiment is different from the first embodiment in that the auxiliary magnetic core 6 is composed of two U-shaped magnetic members.
Is composed of upper coils 7c and 7e disposed between the protrusions 6c and 6d of the upper sub-magnetic core 6 on the vertical axis, and lower coils 7d and 7f disposed between the protrusions 6e and 6f of the lower sub-magnetic core 6. In addition, the configuration in which the coils 7c and 7d are the first set of coils and the coils 7e and 7f are the second set of coils is different from the configurations shown in FIGS. This is different from the ninth embodiment shown.

Here, the first set of coils 7c and 7d and the second set of coils 7e and 7f are connected so as to generate quadrupole magnetic fields in different directions from each other. The number of turns of 7f is larger than the number of turns of the coils 7d and 7e.

For this reason, the first set of coils 7c and 7d and the second set of coils 7e and 7f generate vertical deflection magnetic field components in mutually different directions on the horizontal central axis, and also have the same direction. The horizontal deflection magnetic field component is generated.

This embodiment employs the circuit configuration shown in FIG. 16 so that when a vertical deflection current of a first polarity corresponding to the case of deflecting the upper half surface of the screen flows, a first set of coils is provided. 7c and 7d are shunted, and the current flowing through the first set of coils 7c and 7d is divided into the second set of coils 7e and 7e.
Since the current can be made smaller than the current flowing through 7f, a magnetic field having the shape shown in FIG. 27 can be generated. Therefore, similarly to the eighth embodiment shown in FIG. 14, the bow-shaped misconvergence shown in FIG. 6A can be corrected.

The method of connecting the upper coil and the lower coil of the auxiliary vertical deflection coil 7 in each of the above embodiments may be replaced with each other regardless of the number of the upper coil and the lower coil. . Further, the example in which the protrusion is provided on the horizontal axis of the sub magnetic core 6 has been described. However, the presence or absence of the auxiliary vertical deflection coil 7 wound around the protrusion and the The presence or absence is not limited by the above embodiment.

Further, in each of the above embodiments, the example in which the auxiliary vertical deflection coil 7 is connected in series to the vertical deflection coil 3 has been described, but the auxiliary vertical deflection coil 7 may be connected in parallel with the vertical deflection coil 3. good.

In each embodiment of the present invention, the diode 12c and the resistors 22b, 22c, 22d, 22
e, 22f, 22g, and 22h can be deleted, and the variable resistors 23a and 23b may be replaced with resistors. However, in the case of the above replacement, the amount of misconvergence correction cannot be changed.

[0092]

According to the present invention, since the configuration is as described above, the following effects can be obtained.

That is, a magnetic body is arranged on the electron gun side of the deflection yoke, and the magnetic body is provided with at least a first set of auxiliary vertical deflection coils and a second set of auxiliary vertical deflection coils. Since the ratio of the current values of the vertical deflection currents flowing through the second set of auxiliary vertical deflection coils is changed depending on the direction in which the vertical deflection current flows in the vertical deflection coils, in addition to the normal auxiliary vertical deflection magnetic field component, A quadrupole magnetic field can be formed, along with correction of pincushion distortion and coma of the horizontal line raster at the top and bottom of the screen,
An arcuate misconvergence between vertical lines projected by the electron beams at both ends can be corrected. Further, since another coil for generating a quadrupole magnetic field is not required, there is an effect that the structure can be simplified and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a side surface of a deflection yoke as a first embodiment of the present invention.

FIG. 2 is a rear view showing a rear surface of the deflection yoke of FIG. 1;

FIG. 3 is a connection diagram showing a connection state in the deflection yoke of FIG. 1;

FIG. 4 is a sectional view showing a section of an auxiliary vertical deflection coil in the deflection yoke of FIG. 1;

FIG. 5 is an explanatory diagram for explaining a relationship between a shape of a magnetic field and a deflection force.

FIG. 6 is an explanatory diagram showing a misconvergence pattern on a screen that can be corrected by the present invention.

FIG. 7 is a connection diagram showing a connection state in a deflection yoke as a second embodiment of the present invention.

FIG. 8 is a connection diagram showing a connection state in a main part of a deflection yoke as a third embodiment of the present invention.

FIG. 9 is a connection diagram showing a connection state in a main part of a deflection yoke as a fourth embodiment of the present invention.

FIG. 10 is a connection diagram showing a connection state in a main part of a deflection yoke as a fifth embodiment of the present invention.

FIG. 11 is a connection diagram showing a connection state in a main part of a deflection yoke as a sixth embodiment of the present invention.

FIG. 12 is a connection diagram showing a connection state in a main part of a deflection yoke as a seventh embodiment of the present invention.

FIG. 13 is a rear view showing a rear surface of a deflection yoke according to an eighth embodiment of the present invention.

14 is a cross-sectional view showing a cross section of a main part of the deflection yoke of FIG.

FIG. 15 is a connection diagram showing a connection state in the deflection yoke of FIG.

FIG. 16 is a connection diagram showing a connection state in a main part of a deflection yoke as a ninth embodiment of the present invention.

FIG. 17 is a rear view showing a rear surface of a deflection yoke according to a tenth embodiment of the present invention.

FIG. 18 is a cross-sectional view showing a cross section of a main part of the deflection yoke of FIG. 17;

FIG. 19 is a connection diagram showing a connection state in the deflection yoke of FIG. 17;

FIG. 20 is a rear view showing a rear surface of a deflection yoke as an eleventh embodiment of the present invention.

FIG. 21 is a cross-sectional view showing a cross section of a main part of the deflection yoke of FIG. 20;

FIG. 22 is a connection diagram showing a connection state in the deflection yoke of FIG. 20;

FIG. 23 is a rear view showing a rear surface of a deflection yoke as a twelfth embodiment of the present invention.

FIG. 24 is a cross-sectional view showing a cross section of a main part of the deflection yoke of FIG. 23;

FIG. 25 is a connection diagram showing a connection state in the deflection yoke of FIG. 23;

FIG. 26 is a rear view showing a rear surface of a deflection yoke as a thirteenth embodiment of the present invention.

FIG. 27 is a cross-sectional view showing a cross section of a main part of the deflection yoke of FIG. 26;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Deflection yoke, 2 ... Horizontal deflection coil, 3 ... Vertical deflection coil, 4 ... Main magnetic core, 5 ... Separator, 6 ... Sub magnetic core, 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h
... Protrusions, 7 (7a, 7b, 7c, 7c-1, 7c-
2,7d, 7d-1,7d-2,7e, 7e-1,7e
−2, 7f, 7f-1, 7f-2, 7g, 7h) Auxiliary vertical deflection coil, 8 Electron gun side, 9 Static convergence magnet, 10 Color cathode ray tube, 1
1. Variable inductor, 12a, 12a-1, 12a-
2, 12b, 12b-1, 12b-2, 12c ... diodes, 13a, 13b, 13c, 13d, 13e, 13
f: magnetic field, 14R, 14G, 14B: electron beam, 15
... deflection force, 16 ... internal surface of cathode ray tube, 17R, 17B ... vertical line, 18, 18R, 18G, 18B ... horizontal line raster, 19
... fluorescent screen, 20 ... correction direction, 21 ... electron gun, 22a, 2
2b, 22b-1, 22b-2, 22c, 22c-1,
22c-2, 22d, 22d-1, 22d-2, 22d
−3, 22e, 22f, 22g, 22h, 22i, 22
j, 22k ... resistors, 23a, 23b, 23b-1, 2
3b-2, 23c, 23c-1, 23c-2, 23d,
23e, 23f ... variable resistors.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Souichi Sakurai 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Video Media Research Laboratory, Hitachi, Ltd. 292 Hitachi, Ltd.Video Media Research Laboratories (72) Inventor Hiroki Oguro 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Hitachi Video Media Research Laboratories (72) Inventor Isao Yoshimi 3300 Hayano, Mobara-shi, Chiba Address: Mochira Plant, Hitachi, Ltd. (72) Inventor Atsushi Takeyama 1 Kitano, Makino, Masaki, Mizusawa-shi, Iwate Prefecture Inside Hitachi Mizusawa Electronics Corporation (72) Koji Fukuma 292, Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Prefecture (72) Inventor Michitaka Osawa, Kanagawa, Japan 292 Yoshida-cho, Totsuka-ku, Yokohama Inside Video Media Research Laboratory, Hitachi, Ltd. (72) Inventor Masao Ohara 1 Kitano, Majo, Mizusawa-shi, Iwate Prefecture Inside Hitachi Mizusawa Electronics Co., Ltd. (56) References JP 3 -82290 (JP, A) JP-A-62-35440 (JP, A) JP-A-2-2444891 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 9/28 H01J 29/76

Claims (10)

(57) [Claims] The present invention is applied to a color cathode ray tube which forms an in-line array of multiple electron beams arranged on an axis coinciding with a horizontal center axis, and is used by winding a horizontal deflection coil and a vertical deflection coil around a main magnetic core. A deflection yoke, which is wound around a sub-magnetic core disposed on the electron gun side of the deflection yoke.
At least a first auxiliary vertical deflection coil and a second auxiliary
A vertical deflection coil and a shunt circuit, wherein the first auxiliary vertical deflection coil and the second auxiliary vertical deflection coil are provided.
And vertical alignment with each other in series or parallel to each other.
Connected to the coil, and all or part of the vertical deflection current is
Flowing, the first auxiliary vertical deflection coil and the
Magnetic field formed on the horizontal center axis by two auxiliary vertical deflection coils
The vertical magnetic field components in different directions and
The horizontal magnetic field components are generated in the same direction as each other.
And the shunt circuit is connected to the first auxiliary vertical deflection coil and the second auxiliary vertical deflection coil.
In parallel or in series with each of the auxiliary vertical deflection coils
Connecting the first auxiliary vertical deflection coil and the second auxiliary
The ratio of the vertical deflection current flowing to the vertical deflection coil is
Characterized by changing the direction of the direct deflection current
Deflection yoke. 2. The deflection yoke according to claim 1, wherein
Wherein the secondary magnetic core, winding a third auxiliary vertical deflection coils, to connect the said third auxiliary vertical deflection coil to the vertical deflection coil, flowing the vertical deflection current to the third auxiliary vertical deflection coils A deflection yoke characterized by the above. 3. A deflection yoke according to claim 1 or 2, wherein all or a portion of the first auxiliary vertical deflection coils, said at sub-magnetic cores disposed on the upper side than the horizontal central axis, the second All or a part of the auxiliary vertical deflection coil is disposed below the horizontal center axis in the auxiliary magnetic core, and is connected to each of the first and second auxiliary vertical deflection coils. Are deflection yokes each including a diode. 4. The deflection yoke according to claim 3, wherein
A plurality of the shunt circuits connected to each of the first and second auxiliary vertical deflection coils are connected to each of the first and second auxiliary vertical deflection coils. Deflection yoke. 5. The deflection yoke according to claim 4, wherein
The diodes included in each of the shunt circuits connected to the plurality of first auxiliary vertical deflection coils have different forward voltages from each other and are connected to the plurality of second auxiliary vertical deflection coils. Wherein the diodes included in each of the divided shunt circuits have different forward voltages. 6. The deflection yoke according to claim 1, wherein a resistance is connected in series with said first and second auxiliary vertical deflection coils. 7. The deflection yoke according to claim 6, wherein
A deflection yoke, wherein a pair of diodes having opposite polarities are connected in parallel to the resistor connected in series with the first and second auxiliary vertical deflection coils. 8. The deflection yoke according to claim 1, wherein all or a part of the first auxiliary vertical deflection coil is disposed above the horizontal center axis in the sub-magnetic core, and the second auxiliary vertical deflection coil is disposed above the horizontal center axis . All or a part of the auxiliary vertical deflection coil is disposed below the horizontal center axis in the sub-magnetic core, and the first and second auxiliary vertical deflection coils are connected in series with each other. In the case, the shunt circuit may be configured such that the electron beam deflects and scans one of an upper half or a lower half of a display surface of the color cathode ray tube by the vertical deflection current, and the electron beam flows to the first auxiliary vertical deflection coil when scanning. A first diode having a polarity for blocking a current in the same direction as a flow direction (a first direction) of a vertical deflection current;
A first series circuit composed of a resistor of the type described above is connected in parallel with the second auxiliary vertical deflection coil, and the electron beam deflects and scans the other of the upper half or the lower half of the display surface by the vertical deflection current. A second series comprising a second diode and a second resistor having polarities for blocking a current in the same direction as the flow direction (second direction) of the vertical deflection current flowing through the second auxiliary vertical deflection coil. A circuit connected in parallel with said first auxiliary vertical deflection coil, deflecting one of an upper half or a lower half of a display surface, said vertical flowing through said first auxiliary vertical deflection coil in said first direction during scanning. the deflection current is shunted to the second series circuit, the upper half or lower half of the other deflection of the display surface, the vertical deflection current flowing through the second auxiliary vertical deflection coil in the second direction when the scanning Serial first circuit so as to divert the series circuit, a deflection yoke, characterized in that it consists of. 9. The deflection yoke according to claim 1, wherein all or a part of the first auxiliary vertical deflection coil is disposed above the horizontal center axis in the sub-magnetic core, and the second auxiliary vertical deflection coil is disposed above the horizontal center axis . All or a part of the auxiliary vertical deflection coil is disposed below the horizontal center axis in the sub-magnetic core, and the first and second auxiliary vertical deflection coils are connected in parallel with each other. If the shunt circuit, wherein the first auxiliary vertical deflection coils, a first series circuit consisting of a first polarity of the diode and the first resistor, the opposite to the first polarity And a second series circuit including a diode having a second polarity and a second resistor connected in parallel to each other, and a second auxiliary vertical deflection coil includes a diode having a first polarity and a second A third series of three resistors Connecting a circuit in parallel with a circuit and a fourth series circuit including a diode having a second polarity opposite to the first polarity and a fourth resistor, in parallel with each other; When the electron beam deflects and scans the upper half of the display surface of the color cathode ray tube, the ratio of the current value of the vertical deflection current of the first polarity flowing through the first and second auxiliary vertical deflection coils when the electron beam is scanned. The vertical deflection current of the second polarity flowing through the first and second auxiliary vertical deflection coils when the electron beam deflects and scans the lower half of the display surface by the vertical deflection current. A deflection yoke comprising a circuit configured to be different from a ratio of current values. 10. The color cathode ray tube for forming a multi-electron beam in an in-line arrangement, and the color cathode ray tube attached to the color cathode ray tube for use. A color cathode ray tube device, comprising: a deflection yoke.