JP3195152B2 - Deflection yoke device and color cathode ray tube device using the same - 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 device which is used by being attached to a color cathode ray tube for forming an in-line array of multiple electron beams, and a color cathode ray tube device using the same. And a color cathode ray tube device using the same.

[0002]

2. Description of the Related Art As a prior art relating to a deflection yoke device provided with convergence correction means, for example, Japanese Unexamined Patent Publication No.
A deflection yoke device described in Japanese Patent No. 247093 is exemplified. In the deflection yoke device disclosed in this prior application, the upper side correction coil and the lower side correction coil have:
Connect a pair of diodes in opposite directions,
The connection point between each diode and the corresponding correction coil is connected via an impedance element, so that coma aberration correction and YH misconvergence correction can be achieved simultaneously.

[0003]

However, in the prior art disclosed in the above-mentioned prior application, the misconvergence of the vertical line cannot be individually adjusted on the upper and lower halves of the screen.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a deflection yoke device which can solve the above-mentioned problem and can adjust misconvergence of a vertical line independently on the upper and lower sides of a screen.

[0005]

In order to achieve the above object, in a deflection yoke device according to the present invention, a convergence correction circuit comprising a plurality of circuit elements such as a resistor, a variable resistor and a diode is connected in series to a vertical deflection coil. In addition, one end of each of the plurality of convergence correction coils is connected to the convergence correction circuit, and the other ends of the plurality of convergence correction coils are connected to each other, and the convergence correction circuit flows to the convergence correction coil. A configuration in which a current is changed so that a magnetic field that changes in accordance with a change in the current becomes a quadrupole magnetic field, and the quadrupole magnetic field can be adjusted so as to be different in a first half and a second half of a vertical deflection cycle. It was done.

[0006]

With the above-described circuit configuration, the vertical line misconvergence can be adjusted separately for the upper part of the screen and the lower part of the screen, thereby increasing the adjustment accuracy of the vertical line misconvergence and reducing the residual misconvergence. can do.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a main part of a color cathode ray tube device having a deflection yoke device according to a first embodiment of the present invention. In the figure, 1 is a vertical deflection coil, 3 (3
a, 3b) are convergence correction coils, 4 is a magnetic material, 9 is a deflection yoke, 10 is a color cathode ray tube, and 11 is a core. Vertical deflection coil 1 of deflection yoke 9 of the present embodiment
Is configured in a saddle shape, and a core 11
Is arranged. In the rear of the vertical deflection coil 1,
Convergence correction coils 3a and 3b and magnetic body 4 are attached.

FIG. 2 is a diagram showing a schematic configuration of a deflection yoke device according to a first embodiment of the present invention.
Is the vertical deflection coil, 2 is a convergence correction circuit,
3a and 3b are the convergence correction coils.
As shown in FIG. 2, a convergence correction circuit 2 is connected in series to the vertical deflection coil 1, and convergence correction coils 3a and 3b are connected to the convergence correction circuit 2.
Are connected to each other, and the other ends of the convergence correction coils 3a and 3b are connected to each other. The convergence correction circuit 2 functions to shunt the vertical deflection current Iv to the convergence correction coils 3a and 3b, so that the current Ia flows through the convergence correction coil 3a and the current Ib flows through the convergence correction coil 3b. The circuit configuration of the convergence correction circuit 2 will be described in detail later.
It is configured such that the split ratio of a and Ib can be adjusted.

FIG. 3 is a diagram showing a magnetic field generated by the convergence correction coils 3a and 3b. In the figure, 4 is a magnetic material, 5B, 5G and 5R are electron beams, 6
a and 6b are correction magnetic fields, 7B, 7G and 7R are forces acting on the electron beam, and 8a and 8b are changes in the correction magnetic field. As shown in FIG. 3A, magnetic bodies 4 are arranged above and below the electron beams 5B, 5G, 5R, and convergence correction is performed so that the correction magnetic fields 6a, 6b are oriented in the directions shown in FIG. Mounting coils 3a and 3b. As a result, forces 7B acting on the electron beams 5B, 5G, and 5R in upward directions, respectively,
7G and 7R are added. At this time, the force acting on the electron beam is 7G
Is larger than 7B and 7R, so that the VCR, which is the shift amount between the horizontal line 14G and the horizontal line 14RB shown in FIG. 4C, can be matched. As an adjustment method, the number of turns of the convergence correction coils 3a and 3b may be changed to change the strength of the correction magnetic fields 6a and 6b.

In FIG. 3B, the current Ia flowing through the convergence correction coil 3a is increased and the current Ib flowing through the convergence correction coil 3b is reduced by using the convergence correction circuit 2 shown in FIG. At this time, a change of the correction magnetic field from the state of FIG. 3A is shown. By increasing the current Ia, the correction magnetic field 6a
Is stronger than the state shown in FIG. 3A, so that the change 8a in the correction magnetic field has the same direction as the correction magnetic field 6a shown in FIG. 3A. Also, by reducing the current Ib,
Since the correction magnetic field 6b is weaker than the state shown in FIG. 3A, the change 8b of the correction magnetic field is in the opposite direction to the correction magnetic field 6b shown in FIG. Therefore, the change portions 8a and 8b of the correction magnetic field become quadrupole magnetic fields. As a result, forces 7B and 7R are applied to the electron beams 5B and 5R in the left and right directions, respectively, and the displacement YH of the vertical lines 13R and 13B shown in FIG. 4A can be corrected. Here, the convergence correction circuit 2 of the present invention uses the change 8 of the correction magnetic field.
Since a and 8b can be changed independently in the first half and the second half of the vertical deflection cycle, the YH can be independently adjusted in the upper half and the lower half of the screen 12 in FIG. As will be described later in detail, when the correction is performed without using the diode in the convergence correction circuit 2, the cross-shaped YH shown in FIG. 4B can be simultaneously corrected on the upper and lower sides of the screen 12.

FIG. 5 shows a first example of the convergence correction circuit 2.
FIG. 4 is a circuit diagram showing a specific example in detail. In this figure,
20a and 20b are resistors, 21a and 21b are variable resistors, 2
2a and 22b indicate diodes. A portion surrounded by a dotted line in FIG. 5 is a convergence correction circuit 2, to which the vertical deflection coil 1 and convergence correction coils 3a and 3b are connected. As shown in FIG.
Is connected to the variable terminal of the variable resistor 21a, and the diode 22
b is connected to the variable terminal of the variable resistor 21b. Both ends of the variable resistors 21a and 21b are connected to convergence correction coils 3a and 3b. Hereinafter, the operation of this circuit will be described. It is assumed that the vertical deflection current Iv flows from the vertical deflection coil 1 toward the convergence correction circuit 2 during the first half of the vertical deflection cycle. The vertical deflection current Iv is equal to the resistance 20a
And the current is divided by the resistor 20b and flows as convergence correction coils 3a and 3b as currents Ia and Ib, respectively. At this time, the voltage generated by the resistors 20a and 20b turns on the diode 22a. Therefore, in the first half of the vertical deflection cycle, the shunt ratio of the currents Ia and Ib can be changed by adjusting the variable resistor 21a. Therefore,
It is possible to generate the variations 8a and 8b of the correction magnetic field shown in FIG. 3B, thereby reducing the shift amount YH of the vertical lines 13R and 13B in the upper part of the screen 12 shown in FIG. Can be corrected. Similarly, in the latter half of the vertical deflection cycle, the vertical deflection current Iv is set to the convergence correction coil 3a,
3b flows in the direction of the convergence correction circuit 2. In this case, the diode 22b turns on and the variable resistor 21b
Can adjust the shunt ratio of the currents Ia and Ib. Thereby, the shift amount YH of the vertical lines 13R and 13B in the lower portion of the screen 12 shown in FIG. 4A can be corrected.

FIG. 6 is a circuit diagram showing a second specific example of the convergence correction circuit 2. In this example, the variable resistors 21a, 2
1b is connected to resistors 20a and 20b in parallel. The circuit operation is the same as that of FIG. 5, the diode 22a is turned on in the first half of the vertical deflection cycle, the diode 22b is turned on in the second half of the vertical deflection cycle, and the currents Ia and Ia are turned on.
The shunt ratio of b is adjusted by the variable resistors 21a and 21b.

FIG. 7 is a circuit diagram showing a third specific example of the convergence correction circuit 2. In the circuit configuration of the present example, two types of diodes 22c and 22e having a low on-voltage and diodes 22d and 22f having a high on-voltage are provided (two types of diodes having different on-voltages are provided).
Each diode 22c, 22d, 22e, 22f
Are connected to variable terminals of variable resistors 21c, 21d, 21e and 21f. In addition, diodes 22c and 22
d, 22e and 22f have resistors 20c, 20d and 20 respectively.
e and 20f are respectively connected in series. First, in the first half of the vertical deflection period, the diodes 22c and 22d are turned on. At this time, since the ON voltage of the diode 22c is small, the diode 22c is turned ON in a range corresponding to the screen position from the vicinity of the center of the screen to the upper part of the screen. Further, the diode 22d is turned on at a position corresponding to the upper end of the screen because the on-voltage is large. Therefore, YH near the center of the screen can be corrected by adjusting the variable resistor 21c, and YH near the upper end of the screen can be corrected by adjusting the variable resistor 21d. Similarly, diodes 22e and 22f are turned on in the latter half of the vertical deflection cycle. At this time, since the diode 22e has a low on-voltage, the diode 22e is turned on in a range corresponding to a screen position from near the center of the screen to a lower portion of the screen. Further, since the diode 22f has a high on-voltage, the diode 22f is turned on at a position corresponding to the lower end of the screen. Therefore, YH near the center of the screen can be corrected by adjusting the variable resistor 21e, and YH near the lower end of the screen can be corrected by adjusting the variable resistor 21f. By using two types of diodes having different ON voltages in this manner, YH correction can be performed with high accuracy. The resistors 20c, 20d, 20e, and 20f are connected to limit the current flowing through the diodes 22c, 22d, 22e, and 22f, and to perform YH correction with high accuracy.

FIG. 8 is a circuit diagram showing a fourth specific example of the convergence correction circuit 2. In this example, the variable resistor 21c and the variable resistor 21d for adjusting the upper side of the screen shown in FIG. 7 are combined into one variable resistor 21a, and the variable resistor 21e and the variable resistor 21f for adjusting the lower side of the screen are combined with one variable resistor. 21b
It is summarized in. Further, the resistors 20c and 20c connected to the diodes 22c and 22e having a low on-voltage are used.
e are combined into one resistor 20c, and the resistors 20d connected to the diodes 22d and 22f having a large on-voltage are connected.
d and 20f are combined into one resistor 20d.
The basic circuit operation of this example is the same as that of FIG. 7, but it is possible to construct the convergence correction circuit 2 with fewer circuit elements than the convergence correction circuit 2 of FIG.

FIG. 9 is a circuit diagram showing a fifth specific example of the convergence correction circuit 2. In this example, the convergence correction circuit 2 is provided with a thermistor 2 having a temperature coefficient of resistance of a negative characteristic.
3 is added to provide a circuit configuration that counteracts the temperature drift of the convergence correction circuit 2. Diode 22c,
22d, 22e, and 22f have a characteristic that when the temperature increases, the on-voltage decreases with the temperature. Therefore, a problem that the YH correction amount changes due to a change in the ambient temperature of the diodes 22c, 22d, 22e, and 22f occurs. . In order to solve this problem, in this example, the thermistor 23 and the resistor 2
0h is connected in parallel to a resistor 20g for generating a diode on-voltage. As a result, when the ambient temperature increases, the resistance value of the thermistor 23 decreases, and accordingly, the parallel combined resistance composed of the thermistor 23 and the resistors 20h and 20g decreases. As a result, the voltage at which the diode is turned on also decreases, so that it is possible to take measures against temperature drift.
The thermistor 23 is connected to the resistors 20a and 20b of each of the convergence correction circuits 2 of FIGS.
Can be countered even if they are connected in parallel.

FIG. 10 shows a sixth example of the convergence correction circuit 2.
It is a circuit diagram showing a specific example. In this example, the variable resistors 21a and 21b of the convergence correction circuit 2 described in FIG.
It has a circuit configuration connected in parallel to the resistors 20a and 20b. Also in this example, the thermistor 23 and the resistor 2
0h is connected in parallel with the resistor 20g, and has a circuit configuration capable of taking measures against temperature drift.

FIG. 11 shows the seventh example of the convergence correction circuit 2.
It is a circuit diagram showing a specific example. This example corresponds to FIG.
9 is a circuit configuration in which a resistor 20i and a variable resistor 21c are added to the configuration of FIG. 9 to correct the cross-shaped YH shown in FIG. Since no diode is connected to the variable terminal of the variable resistor 21c, the first half and the second half of the vertical deflection cycle can be adjusted simultaneously, and the cross-shaped YH in FIG. 4B can be corrected. It is possible. Each of the convergence correction circuits 2 shown in FIGS.
Similarly, the cross-shaped YH can be corrected by additionally connecting the resistor 20i and the variable resistor 21c.

FIG. 12 shows an eighth example of the convergence correction circuit 2.
It is a circuit diagram showing a specific example. In this example, the variable resistors 21a and 21b of the convergence correction circuit 2 described with reference to FIG.
Are connected in parallel to the resistors 20a and 20b. Further, similarly to FIG. 11, the resistor 20i and the variable resistor 21
This is a circuit configuration in which c is additionally connected, but differs in that the connection point of the resistor 20i is set to the vertical deflection coil 1. In this circuit configuration, similarly, the cross-shaped YH shown in FIG. 4B can be corrected.

FIG. 13 is a view showing a schematic configuration of a deflection yoke device according to a second embodiment of the present invention. In this embodiment, the convergence correction circuit 2 and the convergence correction coil 3
The circuit configuration is such that a resistor 20j and a variable resistor 21d are connected in parallel to a and 3b. Thereby, the vertical deflection current I
Since a part of v is diverted to the resistor 20j and the variable resistor 21d, and the divided flow can be adjusted by the variable resistor 21d, the current flowing through the convergence correction coils 3a and 3b can be changed. As a result, the strengths of the correction magnetic fields 6a and 6b shown in FIG. 3A change, whereby the difference V between the horizontal lines 14RB and 14G shown in FIG.
The CR can be adjusted. The connection point of the resistor 20j may be in the convergence correction circuit 2.

FIG. 14 is a view showing a schematic configuration of a deflection yoke device according to a third embodiment of the present invention. In this embodiment, a resistor 20j in which a parallel circuit of a diode 22g, a variable resistor 21e and a diode 22h, and a variable resistor 21f are connected in series is connected in parallel to the convergence correction circuit 2 and the convergence correction coils 3a and 3b. It has a circuit configuration. As a result, the diode 22g is turned on in the first half of the vertical deflection cycle, and the diode 22h is turned on in the second half of the vertical deflection cycle, whereby the variable resistors 21e and 21f are independently adjusted in the first and second half of the vertical deflection cycle. Can be done. Therefore, the VCR shown in FIG. 4C can be adjusted independently at the top and bottom of the screen.

FIG. 15 is a view showing a schematic configuration of a deflection yoke device according to a fourth embodiment of the present invention. In this embodiment, the convergence correction coils are 3a-1, 3a-2 and 3a-1.
It is configured by four coils b-1, 3b-2. The convergence correction coil 3a-
Examples of the configuration in which 1, 3a-2, 3b-1, and 3b-2 are attached to the magnetic body 4 are shown in FIG.
Alternatively, it is shown in FIG. FIG. 17A shows an example in which the upper and lower U-shaped magnetic members 4 are used, FIG. 17B shows an example in which the right and left U-shaped magnetic members 4 are used, and FIG. Each example using the magnetic body 4 is shown. As shown in this figure, the variation 8a, 8b of the correction magnetic field
However, the convergence correction coils 3a-1, 3a-2, and 3 are set so that a quadrupole magnetic field as shown in FIG.
By attaching b-1, 3b-2 to the magnetic body 4, the YH correction described so far can be performed.

FIG. 16 is a view showing a schematic configuration of a deflection yoke device according to a fifth embodiment of the present invention. In this embodiment, the convergence correction coils 3c-1 and 3c- are used as the convergence correction coils.
2 and convergence correction coils 3 a-1 and 3 a-whose currents Ia and Ib change in the convergence correction circuit 2.
2, 3b-1, and 3b-2.
The convergence correction coils 3a-1, 3a
17 (c) or 17 (d) shows an example of a configuration in which -2, 3b-1, 3b-2, 3c-1, 3c-2 are attached to the magnetic body 4. FIG. 17C shows an example in which the upper and lower U-shaped magnetic members 4 are used, and FIG.
Examples in which a letter-shaped magnetic body 4 is used are shown. As shown in this figure, the convergence correction coils 3a-1, 3a-2, 3b-1 are set such that the changes 8a, 8b of the correction magnetic field become quadrupole magnetic fields as shown in FIG. , 3
b-2 is attached to the magnetic body 4, and the VC shown in FIG.
Convergence correction coil 3c-1 for R adjustment,
Even if 3c-2 is attached, the YH correction described so far can be performed.

[0024]

As described above, according to the present invention, the misconvergence of the vertical line can be adjusted independently at the upper part and the lower part of the screen, so that the residual misconvergence can be reduced, and the adjustment time can be reduced. This has the effect of reducing time. Furthermore, no temperature drift occurs due to the thermistor.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a color cathode ray tube device having a deflection yoke device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a deflection yoke device according to a first embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a state of a magnetic field generated by a convergence correction coil of the deflection yoke device according to the first embodiment of the present invention;

FIG. 4 is an explanatory diagram showing a misconvergence pattern.

FIG. 5 is a circuit diagram showing a first specific example of a convergence correction circuit applied to the embodiment of the present invention.

FIG. 6 is a circuit diagram showing a second specific example of the convergence correction circuit applied to the embodiment of the present invention.

FIG. 7 is a circuit diagram showing a third specific example of the convergence correction circuit applied to the embodiment of the present invention.

FIG. 8 is a circuit diagram showing a fourth specific example of the convergence correction circuit applied to the embodiment of the present invention.

FIG. 9 is a circuit diagram showing a fifth specific example of the convergence correction circuit applied to the embodiment of the present invention.

FIG. 10 is a circuit diagram showing a sixth specific example of the convergence correction circuit applied to the embodiment of the present invention.

FIG. 11 is a circuit diagram showing a seventh specific example of the convergence correction circuit applied to the embodiment of the present invention.

FIG. 12 is a circuit diagram showing an eighth example of the convergence correction circuit applied to the embodiment of the present invention.

FIG. 13 is a configuration diagram of a deflection yoke device according to a second embodiment of the present invention.

FIG. 14 is a configuration diagram of a deflection yoke device according to a third embodiment of the present invention.

FIG. 15 is a configuration diagram of a deflection yoke device according to a fourth embodiment of the present invention.

FIG. 16 is a configuration diagram of a deflection yoke device according to a fifth embodiment of the present invention.

FIG. 17 is an explanatory diagram showing a configuration example of a convergence correction coil used in the fourth embodiment or the fifth embodiment of the present invention.

[Explanation of symbols]

1 vertical deflection coil 2 convergence correction circuit 3a, 3b, 3a-1, 3a-2, 3b-1, 3b-
2, 3c-1, 3c-2 Convergence correction coil 4 Magnetic material 5B, 5G, 5R Electron beam 6a, 6b Correction magnetic field 7B, 7G, 7R Force acting on electron beam 8a, 8b Change in correction magnetic field 9 Deflection yoke 10 Color cathode ray tube 11 core 12 screen 13B, 13R vertical line 14G, 14RB horizontal line 20a-20j resistance 21a-21f variable resistance 22a-22h diode 23 thermistor

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takahisa Mizuta 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Hitachi, Ltd. Visual Media Research Laboratory (72) Inventor Souichi Sakurai 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Address: Hitachi, Ltd.Video Media Research Laboratory (72) Inventor Nobutaka Okuyama 292, Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Hitachi, Ltd.Video Media Research Laboratory (72) Inventor: Hiroshi Yoshioka 3300 Hayano, Mobara-shi, Chiba Co., Ltd. Hitachi Electronics Co., Ltd. Electronic Device Division (72) Inventor Yoshihiro Ohara 1st Kitano, Makino, Majo, Mizusawa-shi, Iwate Prefecture Hitachi Mizusawa Electronics Co., Ltd. (56) References JP-A-2-44634 (JP, A) JP-A Heihei 3-82290 (JP, A) Actually open Hei 2-126485 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04N 9/28 H01J 29/76

Claims (6)

(57) [Claims] 1. A deflection yoke device having a horizontal deflection coil, a vertical deflection coil and a core for use in a color cathode ray tube for forming an in-line array of multiple electron beams, comprising a plurality of circuit elements such as resistors, variable resistors and diodes. The configured convergence correction circuit is connected in series to the vertical deflection coil, one end of the plurality of convergence correction coils is connected to the convergence correction circuit, and the other ends of the plurality of convergence correction coils are connected to each other. And within the convergence correction circuit
Can be connected to the anode or cathode of the diode.
Take the configuration connected to the middle point of the
The diode in the compensation circuit is variable during the ON period.
The current flowing through the convergence correction coil is changed by adjusting the resistance so that the magnetic field that changes in accordance with the change in the current becomes a quadrupole magnetic field. A deflection yoke device, wherein the deflection yoke device can be adjusted differently in different parts. 2. An in- line array of multiple electron beams.
Horizontal deflection coils and vertical deflection for color cathode ray tubes
In a deflection yoke device having a coil and a core, the deflection yoke device includes a plurality of circuit elements such as resistors, variable resistors, and diodes.
The convergence correction circuit thus formed is connected to the vertical deflection coil.
Connected in series, and multiple convergence correction
And one end of the convergence correction circuit
The other ends of the plurality of convergence correction coils are
The convergence of the above
Flow to the convergence correction coil by the correction circuit
Change according to the amount of change in the current.
The magnetic field becomes a quadrupole magnetic field, and the quadrupole magnetic field is vertically deflected.
Adjustable differently in the first half and the second half of the cycle
Configured, in the upper Symbol convergence correction circuit, a plurality of different diodes of on-voltage, the current flowing through the upper Symbol convergence correction coils, characterized in that to vary according to the number of the diode deflection yoke apparatus. 3. An in- line array of multiple electron beams.
Horizontal deflection coils and vertical deflection for color cathode ray tubes
In a deflection yoke device having a coil and a core, the deflection yoke device includes a plurality of circuit elements such as resistors, variable resistors, and diodes.
The convergence correction circuit thus formed is connected to the vertical deflection coil.
Connected in series, and multiple convergence correction
And one end of the convergence correction circuit
The other ends of the plurality of convergence correction coils are
The convergence of the above
Flow to the convergence correction coil by the correction circuit
Change according to the amount of change in the current.
The magnetic field becomes a quadrupole magnetic field, and the quadrupole magnetic field is vertically deflected.
Adjustable differently in the first half and the second half of the cycle
Configured, in the upper Symbol convergence correction circuit, a thermistor temperature coefficient of resistance shows negative characteristics provided, characterized in that connected in series or in parallel to the resistor connected in parallel to the upper Symbol diode the thermistor Deflection yoke device. 4. An inline array of multiple electron beams.
Horizontal deflection coils and vertical deflection for color cathode ray tubes
In a deflection yoke device having a coil and a core, the deflection yoke device includes a plurality of circuit elements such as resistors, variable resistors, and diodes.
The convergence correction circuit thus formed is connected to the vertical deflection coil.
Connected in series, and multiple convergence correction
And one end of the convergence correction circuit
The other ends of the plurality of convergence correction coils are
The convergence of the above
Flow to the convergence correction coil by the correction circuit
Change according to the amount of change in the current.
The magnetic field becomes a quadrupole magnetic field, and the quadrupole magnetic field is vertically deflected.
Adjustable differently in the first half and the second half of the cycle
Configured, the shunt circuit comprising a circuit element such as a variable resistor, the upper Symbol convergence correction coils or on SL convergence correction circuit and the upper Symbol convergence correction coils, the deflection yoke apparatus is characterized in that connected in parallel. 5. An in- line array of multiple electron beams.
Horizontal deflection coils and vertical deflection for color cathode ray tubes
And have you a deflection yoke device having a coil and a core, a plurality of resistors, up of circuit elements such as a variable resistor and a diode
The convergence correction circuit thus formed is connected to the vertical deflection coil.
Connected in series, and multiple convergence correction
And one end of the convergence correction circuit
The other ends of the plurality of convergence correction coils are
The convergence of the above
Flow to the convergence correction coil by the correction circuit
Change according to the amount of change in the current.
The magnetic field becomes a quadrupole magnetic field, and the quadrupole magnetic field is vertically deflected.
Adjustable differently in the first half and the second half of the cycle
Configured, upper Symbol plurality of convergence correction coils, characterized glide part or foot portion of the U-shaped magnetic substance, or Watari part or foot part of the E-shaped magnetic material, or that it has attached to the foot of the round magnetic Deflection yoke device. 6. A color cathode ray tube device comprising the deflection yoke device according to claim 1 provided to a color cathode ray tube for forming a multi-electron beam in an in-line arrangement.