KR20040063761A - Deflection yoke - Google Patents

Abstract

PURPOSE: A deflection yoke is provided to correct horizontal mis-convergence in advance with a small number of components. CONSTITUTION: A deflection yoke includes a parallel circuit and a serial circuit. The parallel circuit includes the first and second terminals(1,2), the first and second vertical deflection coils(3,4) serially connected between the first and second terminals, the first and second diodes(7,8) serially connected such that their polarities become opposite to each other, and the third and fourth diodes(9,10) serially connected such that their polarities become opposite to each other. The first and third diodes are coupled such that their polarities become opposite to each other, and the second and fourth diodes are connected such that their polarities become opposite to each other. The serial circuit includes a variable resistor(11) and the first and second fixed resistors(12,13) having the variable resistor therebetween. The serial circuit is coupled between the contact node of the first and second diodes and the contact node of the third and fourth diodes.

Description

Deflection yoke

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke mounted on an in-line color receiving tube and deflecting an electron beam, and more particularly, to a deflection yoke capable of correcting horizontal line misconvergence at upper and lower ends of a screen.

Of the red (R), green (G), and blue (B) electron beams of the in-line type water tube, as shown in FIG. 7A, horizontal lines of B shown by dotted lines at the top and bottom of the screen are indicated by solid lines. As shown in Fig. 7B, a horizontal line misconvergence is known in which, in the upper and lower portions of the screen, a horizontal line of B shown by a dotted line deviates above a horizontal line of R shown by a solid line.

As a deflection yoke which correct | amends the horizontal line | wire miss convergence shown to these FIG. 7A, 7B, there exist some shown in FIG. The conventional deflection yoke shown in FIG. 6 is described in Japanese Patent Laid-Open No. 7-212777 (Patent Document 1). In FIG. 6, the vertical deflection coils 3, 4 are connected in series between the terminals 1, 2. One end of the resistor 5 is connected to the connection point of the terminal 1 and the vertical deflection coil 3, and one end of the resistor 6 is connected to the connection point of the terminal 2 and the vertical deflection coil 4. have.

The parallel circuit is formed of the diodes 7 and 8 connected in series so that the polarities are reverse to each other, and the diodes 9 and 10 connected in series so that the polarities are reverse to each other. The diodes 7 and 9 have reverse polarities, and the diodes 8 and 10 have reverse polarities. The other end of the resistor 5 is connected to the connection point of the diodes 7 and 9, and the other end of the resistor 6 is connected to the connection point of the diodes 8 and 10. In addition, the variable resistor 11 is connected between the connection point of the diodes 7 and 8 and the connection point of the diodes 9 and 10, and the variable terminal (slider) of the variable resistor 11 has a vertical deflection coil 3, It is connected to the connection point of 4).

In the deflection yoke of FIG. 6 configured as described above, the horizontal line miss shown in FIGS. 7A and 7B is moved by moving the position of the variable terminal of the variable resistor 11 to the diodes 7 and 8 side or the diodes 9 and 10. Convergence can be corrected.

[Patent Document 1]

Japanese Patent Laid-Open No. 7-212777 (page 5-6, Fig. 5)

However, the deflection yoke is delivered to an integrated tube component (ITC) maker that mounts the deflection yoke to the color receiving tube and sells it to the display device maker, or mounts the deflection yoke to the color receiving tube and mounts the deflection yoke to the color receiving tube. It can also be delivered to a display device maker that attaches to an object and serves as a display device. When the deflection yoke is delivered to an ITC maker or a display device maker, the deflection yoke is mounted on a color receiving tube for adjustment in advance, and then various adjustments such as convergence adjustment are performed.

7A and 7B, the horizontal line miss convergence is almost the same due to the characteristics of the color water pipe to which the deflection yoke is mounted and the vertical deflection coils 3 and 4 which are components of the deflection yoke. There is something that arises due to the gap of the color of the water tube. The former is preferably corrected (adjusted) by the deflection yoke maker before delivery to the ITC maker or display device maker. Since the latter is attributable to the gap between individual color water tubes, it is necessary for the ITC maker or display device maker to correct (adjust) the deflection yoke in a state where the color yoke is attached to the individual color water tubes.

Originally, in the configuration shown in Fig. 6, the position of the variable terminal of the variable resistor 11 is centered in the state before the convergence adjustment for correcting the horizontal line miss convergence shown in Figs. 7A and B in the ITC maker or the display device maker. Set to (middle point) so that unbalanced currents do not flow in the vertical deflection coils 3 and 4, and the variable resistor 11 is sent as necessary in the convergence adjustment process to correct the horizontal line convergence shown in FIGS. 7A and 7B. It is desirable to.

However, in the conventional deflection yoke shown in Fig. 6, in order to correct the horizontal line misconvergence which occurs almost identically due to the characteristics of the above-mentioned color receiving tube and the vertical deflection coils 3 and 4, the deflection yoke maker has a variable resistor. The position of the variable terminal in (11) must be adjusted. Then, at the time of delivering the deflection yoke to the ITC maker or the display device maker, the variable terminal of the variable resistor 11 is not located at the center of gravity, which is undesirable in the ITC maker or the display device maker. If the position of the variable terminal of the variable resistor 11 is moved in advance, the amount of adjustment for gap correction in the ITC maker or the display device maker is reduced on the moved side.

As described above, the conventional deflection yoke illustrated in FIG. 6 has a first problem in that the horizontal miss convergence shown in FIGS. 7A and 7B cannot be corrected in a state where the variable terminal of the variable resistor 11 is positioned at the midpoint. In addition, the conventional deflection yoke shown in FIG. 6 has a second problem that there are many component points such as resistance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in the state where the variable terminal of the variable resistor is placed at the center point, it is possible to correct in advance the horizontal line misconvergence which occurs almost identically due to the characteristics of the color receiving tube or the vertical deflection coil. It is a first object to provide a deflection yoke. It is also a second object to provide a deflection yoke capable of correcting horizontal miss convergence with fewer component points.

1 is a circuit diagram showing a first embodiment of a deflection yoke of the present invention.

Fig. 2 is a diagram showing a relationship between a magnetic field and a deflection force for explaining the action by the deflection yoke of the present invention.

3 is a view for explaining a correction action on a screen by a deflection yoke of the present invention.

4 is a circuit diagram showing a second embodiment of the deflection yoke of the present invention.

5 is a circuit diagram showing a third embodiment of the deflection yoke of the present invention.

6 is a circuit diagram showing a conventional example.

FIG. 7 illustrates horizontal line miss convergence. FIG.

8 illustrates another horizontal line miss convergence.

Brief description of symbols for the main parts of the drawings

1, 2: terminal 3, 4: vertical deflection coil

7 to 10: diode 11: variable resistor

12 to 18: fixed resistance

The present invention provides the following deflection yokes of a to c in order to solve the problems of the prior art described above.

(a) First and second vertical deflection coils in a deflection yoke mounted in an in-line color water pipe, the first and second terminals 1 and 2 being connected in series with each other between the first and second terminals. (3, 4), the first and second diodes 7, 8 connected in series with each other in reverse polarity, and the third and fourth diodes 9, 10 connected in series with each other in reverse polarity with each other. A parallel circuit in which the first diode and the third diode are connected so that their polarities are opposite to each other, and the second diode and the fourth diode are connected so that their polarities are opposite to each other, and the variable resistor 11 And a series circuit having first and second fixed resistors 12 and 13 interposed between the variable resistors and connected between connection points of the first and second diodes and connection points of the third and fourth diodes. The connection point of the first terminal and the first vertical deflection coil is The connection point of the second terminal and the second vertical deflection coil is connected to the connection point of the first diode and the third diode without passing through the term, and the connection point of the second diode and the fourth diode does not pass through the resistor. A deflection yoke, connected to a connection point, wherein the variable terminal of the variable resistor is connected to a connection point of the first and second vertical deflection coils.

(b) In a deflection yoke mounted on an inline type color water pipe, first and second vertical deflection coils connected in series with each other between the first and second terminals 1 and 2 and the first and second terminals. (3, 4), first and second diodes 7 and 8 connected in series with each other in reverse polarity with each other, and first and second fixed resistors 14 and 15 provided between the first and second diodes. And a third and fourth fixed resistor (16) provided between the third and fourth diodes (9, 10) and the third and fourth diodes connected in series so as to be reversed in polarity with each other. And a second series circuit composed of 17), wherein the first diode and the third diode are connected so that their polarities are opposite to each other, and the second diode and the fourth diode are connected so that their polarities are opposite to each other. A circuit, a connection point of the first and second fixed resistors, and the first The variable resistor 11 connected between the connection points of a 3rd and 4th fixed resistor is provided, The connection point of the said 1st terminal and said 1st vertical deflection coil does not pass through a resistor, The said 1st diode and said 3rd diode A connection point of the second terminal and the second vertical deflection coil is connected to a connection point of the second diode and the fourth diode without passing through a resistor, and the variable terminal of the variable resistor A deflection yoke connected to the connection points of the first and second vertical deflection coils.

(c) First and second vertical deflection coils in a deflection yoke mounted in an in-line color water tube, the first and second terminals 1 and 2 and the first and second terminals connected in series with each other. (3, 4), the first and second diodes 7, 8 connected in series with each other in reverse polarity, and the third and fourth diodes 9, 10 connected in series with each other in reverse polarity with each other. A parallel circuit having the first diode and the third diode connected in opposite polarity to each other, and the second diode and the fourth diode connected in reverse polarity to each other; A variable resistor 11 connected between a connection point of two diodes and a connection point of the third and fourth diodes, one end of which is connected to a connection point of the first and second vertical deflection coils, and the other end of the variable resistor A fixed resistor 18 connected to the variable terminal of The connection point of the first terminal and the first vertical deflection coil is connected to the connection point of the first diode and the third diode without passing through a resistor, and the connection point of the second terminal and the second vertical deflection coil is The deflection yoke is connected to a connection point between the second diode and the fourth diode without passing through a resistor.

EMBODIMENT OF THE INVENTION Hereinafter, the deflection yoke of this invention is demonstrated with reference to attached drawing. 1 is a circuit diagram showing a first embodiment of a deflection yoke of the present invention, FIG. 2 is a diagram showing a relationship between a magnetic field and a deflection force for explaining the action of the deflection yoke of the present invention, and FIG. 4 is a circuit diagram showing a second embodiment of the deflection yoke of the present invention, and FIG. 5 is a circuit diagram showing a third embodiment of the deflection yoke of the present invention. to be. In addition, in FIG. 1, FIG. 4, FIG. 5, the same code | symbol is attached | subjected to the same part as FIG.

<First Embodiment>

The first embodiment shown in Fig. 1 solves the above-mentioned first problem and achieves a first object. In FIG. 1, the vertical deflection coils 3 and 4 are connected in series between the terminals 1 and 2. FIG. The vertical deflection coils 3 and 4 are arranged on the left and right so as to sandwich the neck portion of the in-line color water pipe. The parallel circuit is formed of the diodes 7 and 8 connected in series so that the polarities are reverse to each other, and the diodes 9 and 10 connected in series so that the polarities are reverse to each other. The diodes 7 and 9 have reverse polarities, and the diodes 8 and 10 have reverse polarities.

Unlike the conventional example of FIG. 6, the connection point of the terminal 1 and the vertical deflection coil 3 is connected to the connection point of the diodes 7 and 9 without passing through a resistor, and the terminal 2 and the vertical deflection coil 4 are connected to each other. Is connected to the connection points of the diodes 8 and 10 without passing through a resistor, unlike the conventional example of FIG. In addition, between the connection points of the diodes 7 and 8 and the connection points of the diodes 9 and 10, the fixed resistors 12 and 13 are arranged in series so as to sandwich the variable resistor 11 and the variable resistor 11. Connected. The variable terminal (slider) of the variable resistor 11 is connected to the connection point of the vertical deflection coils 3 and 4.

In the configuration shown in FIG. 1, even when the variable terminal of the variable resistor 11 is positioned at the center point, the resistance values of the resistors 12 and 13 are properly adjusted so that the resistance values of the resistors 12 and 13 are different from each other. If set, unbalanced current flows through the vertical deflection coils 3 and 4. As a result, even in the state where the variable terminal of the variable resistor 11 is positioned at the midpoint, the horizontal line misconvergence shown in FIGS. 7A and 7B can be corrected.

Here, consider the case where the resistance values of the resistors 12 and 13 are set to the resistors 12 < When deflecting toward the upper side of the screen of the color receiving tube, a vertical deflection current flows in the direction indicated by the solid arrow in FIG. When the vertical deflection current flows in the direction indicated by the solid arrow, the diodes 9 and 8 are turned on and the diodes 7 and 10 are turned off.

At this time, the resistance value connected in parallel to the vertical deflection coil 3 is closer to the resistance 13 side than the variable terminal of the resistance 13 + variable resistor 11. Since the variable terminal of the variable resistor 11 is located at the midpoint, it becomes resistance 13 + (variable resistor 11) / 2. The resistance value connected in parallel to the vertical deflection coil 4 is larger than the variable terminal of the resistor 12 + variable resistor 11, that is, the resistor 12 + (variable resistor 11) / 2 do. Since it is resistance 12 <resistance 13, when comparing the electric current which flows through the vertical deflection coils 3 and 4, it becomes a vertical deflection coil 3> vertical deflection coil 4. As shown in FIG.

In this state, if the magnetic field generated from the vertical deflection coil 3 is φ3 and the magnetic field generated from the vertical deflection coil 4 is φ4, the vertical deflection magnetic field is φ3> φ4. As a result, shown in Fig. 2A. As described above, the deflection forces FR and FB applied to the electron beams R and B are FR <FB. Since the deflection force FB applied to the electron beam B becomes larger than the deflection force FR applied to the electron beam R, as shown in FIG. 3A, the horizontal line of B shown by a dotted line at the top of the screen is a solid line. It is biased upward rather than the horizontal line of R shown by. Therefore, the horizontal line miss convergence which the horizontal line of B shown by the dotted line at the top of a screen shown in FIG. 7A deviates below the horizontal line of R shown by the solid line is correct | amended.

On the other hand, when deflecting below the screen of the color receiver tube, the vertical deflection current is caused to flow in the dotted arrow display direction of FIG. When the vertical deflection current flows in the direction indicated by the dotted arrow, the diodes 10 and 7 are on and the diodes 8 and 9 are off.

At this time, the resistance value connected in parallel to the vertical deflection coil 3 is higher than the variable terminal of the resistor 12 + variable resistor 11, i.e., resistor 12 + (variable resistor 11). Becomes / 2. The resistance value connected in parallel to the vertical deflection coil 4 is higher than the variable terminal of the resistor 13 + variable resistor 11, that is, the resistor 13 + (variable resistor 11) / 2 do. Since the resistance 12 is the resistance 13, the current flowing through the vertical deflection coils 3 and 4 is compared to the vertical deflection coil 3 and the vertical deflection coil 4.

In this state, the vertical deflection magnetic field is φ3 <φ4. As a result, as shown in Fig. 2B, the deflection forces FR and FB applied to the electron beams R and B become FB < FR. Since the deflection force FR applied to the electron beam R becomes larger than the deflection force FB applied to the electron beam B, as shown in FIG. 3B, the horizontal line of R shown by a solid line at the bottom of the screen is dotted. It is deflected below the horizontal line of B shown by. Therefore, the horizontal line misconvergence in which the horizontal line of B shown by the dotted line at the bottom of the screen shown in FIG. 7A deviates below the horizontal line of R shown by the solid line is corrected.

Although not shown in particular, in the configuration shown in FIG. 1, when the resistance values of the resistors 12 and 13 are set to the resistance 12> the resistance 13, the above-described resistance 12 <resistance 13 is set. Inversely to the case, the horizontal miss convergence shown in FIG. 7B is corrected.

As described above, the deflection yoke of the first embodiment shown in FIG. 1 is almost attributable to the characteristics of the color receiving tube and the vertical deflection coils 3 and 4 in the state where the variable terminal of the variable resistor 11 is positioned at the midpoint. The same misaligned horizontal line convergence can be corrected in advance. Therefore, when the ITC maker or the display device maker adjusts the variable resistor 11 in the state where each deflection yoke is attached to each color receiving tube, the misalignment of horizontal lines caused by the gap between the individual color receiving tubes is corrected. good.

In the conventional example shown in Fig. 6, when the resistance values of the resistors 5 and 6 are changed in a state where the variable terminal of the variable resistor 11 is positioned at the midpoint, as shown in Figs. 8A and 8B. In the upper and lower ends of the screen, the horizontal line misconvergence of the horizontal line of B, which is indicated by a dotted line, is shifted to the inner side (center side in the vertical direction) or to the outer side (the upper and lower end sides) than the horizontal line of R, which is indicated by a solid line, is corrected. In the conventional example shown in FIG. 6, in the state where the variable terminal of the variable resistor 11 is positioned at the midpoint, the horizontal line miss convergence shown in FIGS. 7A and 7B cannot be corrected.

Second Embodiment

The second embodiment shown in FIG. 4 also solves the above-described first problem and achieves the first object. In FIG. 4, the vertical deflection coils 3, 4 are connected in series between the terminals 1, 2. The vertical deflection coils 3 and 4 are arranged on the left and right so as to sandwich the neck portion of the in-line color water pipe. A series circuit consisting of fixed resistors 14 and 15 provided between diodes 7 and 8 and diodes 7 and 8, and fixed resistors provided between diodes 9 and 10 and diodes 9 and 10 ( The series circuit and the parallel circuit which consist of 16 and 17 are formed.

The diodes 7, 8 are connected in series with each other in reverse polarity, and the diodes 9, 10 are also connected in series with each other in reverse polarity. The diodes 7 and 9 are reversed in polarity, and the diodes 8 and 10 are reversed in polarity.

Unlike the conventional example of FIG. 6, the connection point of the terminal 1 and the vertical deflection coil 3 is connected to the connection point of the diodes 7 and 9 without passing through a resistor, and the terminal 2 and the vertical deflection coil 4 are connected to each other. Is connected to the connection points of the diodes 8 and 10 without passing through a resistor, unlike the conventional example of FIG. The variable resistor 11 is connected between the connection points of the resistors 14 and 15 and the connection points of the resistors 16 and 17. The variable terminal (slider) of the variable resistor 11 is connected to the connection point of the vertical deflection coils 3 and 4.

Also in the structure shown in FIG. 4, in a state where the variable terminal of the variable resistor 11 is positioned at the center point, the resistance 15 and the resistance are different from each other so that the resistance values of the resistor 14 and the resistor 17 are different from each other. If the resistance values of the resistors 14 to 17 are set appropriately so that the resistance values of the 16 are different from each other, an unbalanced current flows in the vertical deflection coils 3 and 4. Thereby, even in the state where the variable terminal of the variable resistor 11 is positioned at the midpoint as in the first embodiment, it is possible to correct the horizontal line miss convergence shown in Figs. 7A and 7B.

Third Embodiment

The third embodiment shown in FIG. 5 solves the above-mentioned second problem and achieves a second object. In FIG. 5, the vertical deflection coils 3 and 4 are connected in series between the terminals 1 and 2. FIG. The vertical deflection coils 3 and 4 are arranged on the left and right so as to sandwich the neck portion of the in-line color water pipe. The parallel circuit is formed of the diodes 7 and 8 connected in series so that the polarities are reverse to each other, and the diodes 9 and 10 connected in series so that the polarities are reverse to each other. The diodes 7 and 9 are reversed in polarity, and the diodes 8 and 10 are reversed in polarity.

Unlike the conventional example of FIG. 6, the connection point of the terminal 1 and the vertical deflection coil 3 is connected to the connection point of the diodes 7 and 9 without passing through a resistor, and the terminal 2 and the vertical deflection coil 4 are connected to each other. Is connected to the connection points of the diodes 8 and 10 without passing through a resistor, unlike the conventional example of FIG. Often, the variable resistor 11 is connected between the connection point of the diodes 7 and 8 and the connection point of the diodes 9 and 10. One end of the fixed resistor 18 is connected to the connection point of the vertical deflection coils 3, 4, and the other end of the resistor 18 is connected to the variable terminal (slider) of the variable resistor 11. .

The deflection yoke of the third embodiment cannot correct the horizontal line miss convergence shown in Figs. 7A and 7B while the variable terminal of the variable resistor 11 is located at the midpoint, but the variable yoke (Fig. By shifting the position of the variable terminal of 11) to the diodes 7 and 8 side or the diodes 9 and 10, the horizontal line convergence shown in Figs. 7A and 7B can be corrected. The deflection yoke of the third embodiment can reduce the resistance by one, and make it possible to have fewer component points, compared with the conventional example of FIG. Therefore, space reduction and cost reduction can be aimed at.

As described in detail above, the deflection yoke of the present invention is almost attributable to the characteristics of the color receiving tube and the vertical deflection coil in the state where the variable terminals of the variable resistors are positioned at the midpoints by the configuration of the first and second embodiments. The same misaligned horizontal line convergence can be corrected in advance. In addition, by the configuration of the third embodiment, it is possible to correct miss convergence in a row with fewer component points.

Claims (3)

In a deflection yoke mounted on an inline color water tube, First and second terminals, First and second vertical deflection coils connected in series between the first and second terminals; First and second diodes connected in series with each other in reverse polarity, and third and fourth diodes connected in series with each other in reverse polarity with each other, wherein the first diode and the third diode are polarized with each other; A parallel circuit connected in a reverse direction and connected to each other such that the second diode and the fourth diode are reversed in polarity with each other; A series circuit having a variable resistor and a first and a second fixed resistor sandwiching the variable resistor, and connected between a connection point of the first and second diodes and a connection point of the third and fourth diodes, A connection point of the first terminal and the first vertical deflection coil is connected to a connection point of the first diode and the third diode without passing through a resistor, and a connection point of the second terminal and the second vertical deflection coil is Is connected to a connection point of the second diode and the fourth diode without passing through a resistor, The variable terminal of the variable resistor is connected to a connection point of the first and second vertical deflection coils, the deflection yoke. In a deflection yoke mounted on an inline color water tube, First and second terminals, First and second vertical deflection coils connected in series between the first and second terminals; A first series circuit composed of first and second diodes connected in series with each other in reverse polarity and first and second fixed resistors provided between the first and second diodes, and in series with each other in reverse polarity And a second series circuit consisting of third and fourth diodes connected to each other, and third and fourth fixed resistors provided between the third and fourth diodes, wherein the first diode and the third diode are polarized with each other. A parallel circuit connected in a reverse direction and connected to each other such that the second diode and the fourth diode are reversed in polarity with each other; A variable resistor connected between the connection point of the first and second fixed resistors and the connection point of the third and fourth fixed resistors, A connection point of the first terminal and the first vertical deflection coil is connected to a connection point of the first diode and the third diode without passing through a resistor, and a connection point of the second terminal and the second vertical deflection coil is Is connected to a connection point of the second diode and the fourth diode without passing through a resistor, The variable terminal of the variable resistor is connected to a connection point of the first and second vertical deflection coils, the deflection yoke. In a deflection yoke mounted on an inline color water tube, First and second terminals, First and second vertical deflection coils connected in series between the first and second terminals; First and second diodes connected in series with each other in reverse polarity, and third and fourth diodes connected in series with each other in reverse polarity with each other, wherein the first diode and the third diode are polarized with each other; A parallel circuit connected in a reverse direction and connected to each other such that the second diode and the fourth diode are reversed in polarity with each other; A variable resistor connected between the connection point of the first and second diodes and the connection point of the third and fourth diodes, One end is connected to a connection point of the first and second vertical deflection coils, the other end is provided with a fixed resistor connected to the variable terminal of the variable resistor, A connection point of the first terminal and the first vertical deflection coil is connected to a connection point of the first diode and the third diode without passing through a resistor, and a connection point of the second terminal and the second vertical deflection coil is The deflection yoke is connected to a connection point between the second diode and the fourth diode without passing through a resistor.