TW588555B - Deflection yoke device - Google Patents

Abstract

The objective of the present invention is to prevent miss convergence in the Y axis horizontal direction on the upper part of an image screen with simple constitution. To achieve the purpose, with reference to Fig. 7, a coma coil is composed of a first coma coil part 151 corresponding to the upper part of image screen, and a second coma coil part 152 corresponding to the lower part of the image screen. The first and second coma coil parts are composed of a series circuit by the first and second coils 111a and 111c and a diode D1; a resistance R1 connected to either one coil of the first and second coils so as to become parallel to the diode; a series circuit by third and fourth coils 111b and 111d and a diode D2; and a resistance R2 connected to either one coil of the third and fourth coils so as to become parallel to the diode D2.

Description

588555 The neck printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs will be installed with a partially-emitted electron beam towards it, which can illuminate the oblique appearance of the electron beam (stereotactic line (not shown) and vertical deviation) The inner peripheral side of the coil 1 3 1 4 and the outer peripheral side of the vertical 4. The winding body A7 B7 facing the large straight (flange) part in the front 5. Explanation of the invention ([Technical field to which the invention belongs] The present invention This is a deflection yoke device for the neck of a color cathode tube, such as a Braun tube. [Known Technology] A deflection yoke device for a color white tube used in a television receiver. The deflection yoke device The user is deflected (deflected) from the horizontal and vertical directions of the electron gun. Raster scanning is realized on the screen of the Bailang tube. Figure 1 is a diagram showing the conventional yoke device. The yoke device has a saddle-type horizontal deflection. It is directly wound on a toroidal magnetic core 1 2. The horizontal deflection coil is provided in the coil divider, and the straight deflection coil 1 3 is provided in the coil divider 1. The coil divider 14 has a hollow portion at the axial diameter and the rear. Small diameter part Each is provided with a coma-coil 15 at the rear end of the deflection yoke device. Further, a terminal plate 16 is mounted for use as a relay terminal plate for connecting a coil or the like. As shown in FIG. 2 (A), the coma coil 15 has the first (1) coma coil portion 15 (including the coils 15a, 15c) and the second coma coil portion 1 of the same (同一) winding number. 5 2. The coma coil portions 15 1 and 15 2 are formed in the same structure. 矣 | 0 ^ 3 ^ §1 national standard (〇 奶) 8 4 specifications (210 > < 297 mm) ' ~ (Please read the notes on the back before filling this page)

-4-588555 A7 B7 V. Description of the invention ($ (please read the precautions on the back before filling in this page) As shown in Figure 2 (B), the first coma line part 1 5 1 is the coil 1 5 a , 1 5 c is formed by winding around the bobbin 5 A 1. The hollow part of the bobbin 5 A 1 is penetrated by a yoke 5 B 1. The second coma wire loop 1 5 2 has the same structure. That is, the coma coil 15 is composed of a first coma line portion 15 1 corresponding to the upper side of the screen (shadow surface) and a second coma coil portion 1 5 2 corresponding to the lower side of the day surface. One of the winding layers of the coils 1 5 a and 1 5 c may be on the upper layer, and any of the coils 1 5 b and 1 5 d may be on the upper layer. Fig. 3 (A), Fig. 3 ( B) is the wiring diagram of the above-mentioned coils and electronic components. The horizontal deflection is shown in Figure 3 (A). The structure of the differential acting coil 17 is connected to the horizontal deflection coil 11. The horizontal deflection coil 11 is composed of the coil. The saddle coil section 1 1 A above and below the divider 14 is composed of the saddle coil section 1 1 B. The vertical deflection system is shown in FIG. 3 (B), and the coma coil 1 5 is connected to the vertical deflection coil 1 3. Vertical deflection coils 1 of 3 series It is arranged above and below the coil divider 14. It is composed of a coil portion 1 A connected in series, and the Intellectual Property Bureau of the Ministry of Economic Affairs (printed by Industry and Consumer Cooperatives, 1 3 B. In addition, a pair of vertical deflection coils is used. When the saddle-shaped vertical deflection coil is used, the saddle-shaped vertical deflection coil will be arranged on the left and right sides. At the end of the vertical deflection coil 1 3, a power terminal T 1 is provided. At the other end of the vertical deflection coil 13, One end of the coils 15 a and 15 b of the coma coil 15 is connected in common. The other end of the coil 15 a is connected to one end of the coil χ 5 d in the forward direction by the diode D 1. The coil China National Standards (CNS) A4 specifications (210x297 -5- 588555 A7 B7 V. Description of the invention (▲ (Please read the precautions on the back before filling out this page) 1 5 The other end is by the diode D 2 towards the reverse direction Connected to one end of wire 圏 1 5 d. Diodes D1 and D2 are connected in parallel with resistors R1 and R2. The other end of wire 圏 1 5 d is connected to one end of coil 1 5 c. Coil 1 5 c The other end is arranged at the power terminal τ 2. The above-mentioned coils 1 5 a and 1 5 b are also called Y Η line Η, especially When the electron beam scans the upper and lower areas of the screen, it is provided for the purpose of correcting the misconvergence (under-convergence, non-convergence) in the lateral direction of the sub-beams (red, blue). The coil is also 15 d ' 1 5 c is also called a VCR line maker, and is provided for the purpose of correcting the misalignment of the center beam (green) and the sub beams (red and blue) in the longitudinal direction. When the vertical scanning signal is given to the power supply terminal in the above-mentioned vertical deflection system, currents 5 a and 5 b will flow in the Y Η coil in parallel relationship. Fig. 4 shows how the currents flowing in the coils 15 a and 15 b change on the upper and lower sides of the screen. The solid line is the current 5 a 'flowing through the coil 1 5 a and the broken line is the current 5 b flowing through the coil 1 5 b. t is the time axis, and i is the current 値 (A). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. When the upper part of the screen is biased, a positive high voltage is given to the positive power terminal and it is reduced over time. At this time, the diode D 1 is turned on to be biased in the forward direction, and the diode D 2 is biased in the reverse direction to be turned off (off). Therefore, the coil 1 5 b is in a state where the resistor R 2 is connected in series. When the lower part of the screen is biased, a positive voltage is supplied to the negative power terminal, and the voltage increases with time. At this time, the diode D 2 is biased in the forward direction to be turned on, and the diode D 1 is biased in the reverse direction to be turned off. Therefore, the upper side coil 15a is in a state where the resistor R1 is connected in series. 〇Applicable to China National Standard (CNS) A4 specification (210X297 mm) -6- 588555 A7 B7 V. Description of the invention ((Please read the precautions on the back before filling this page). As a result, when the upper part of the screen is skewed, The current at the upper side coil 15a becomes larger than the current at the lower side coil 15b. At this time, a large pincushion-shaped (pincushion) magnetic field can be formed by the upper side coil 15a. As a result, It is possible to correct the misconvergence Y γ in the horizontal direction of the γ (screen vertical) axis. When the lower part of the daytime plane is deflected, the current flowing in the lower side coil 15 b will be larger than the current flowing in the upper side coil 15 a. At this time, a large pincushion magnetic field of 15 b in the lower side coil is similarly used to correct the misconvergence Y 横 in the horizontal direction of the γ axis. (The part constituted by the Y Η coil, the resistor, and the diode will be called The correction circuit is Υ Η. However, when we examine it in more detail, it can be seen from FIG. 4 that when the upper part of the screen is deflected, the current difference between the upper coil 15 a and the lower coil 15 b flows from the peripheral part of the screen. I 2 to the central part of the day I 1 has a contracted state, Ministry of Economic Affairs, Intellectual Property Office This situation is printed by the industrial and consumer cooperatives as shown in Fig. 5. A Y-axis horizontally-disoriented YH (a state where the blue electron beam is left and the red electron beam is right) is generated at the upper end of the screen. It is the cause of the deterioration of the image quality (image quality) throughout the daytime surface. Figure 5 shows a part of the vertical trajectory of the beam spot of R, G, and B when viewed from the front of the color white tube screen. As mentioned above, in the upper part of the screen, because the currents 5a and 5b are different, misconvergence (under-convergence) occurs. Fig. 6 is another YH correction circuit. Compared with the correction circuit in Fig. 2, the resistors R1 a and R2 are added. a, and diodes D la, D2 a to implement the rise of the diode delicately, which is applicable for the purpose of organizing the current waveform. National Standard (CNS) A4 specification (210X297 mm) Ministry of Economy Zhici Printed by the staff of the Property Bureau Consumer Cooperative Co., Ltd. Paper size is appropriate) 11365 588555 A7 __ B7__ V. Description of the invention ($ circuit. In addition, the parts corresponding to the components shown in FIG. 3 are attached with the same symbols as in FIG. 3. According to this YH correction circuit, it is necessary to eliminate misconvergence A little effect may be obtained, but there is no fundamental improvement in the factors (factors) related to the misconvergence of the perimeter surface Y 昼. [Problems to be solved by the invention] As mentioned above, the conventional yoke device is used to correct the problem. The current changes of the two coil parts of the circuit will not change linearly, especially in the upper part of the screen, it will cause the problem of misconvergence. Therefore, the object of the present invention is to provide a simple structure to prevent A yoke device that is misaligned (under-converged) in the horizontal direction of the axis. [Means for solving the problem] In order to achieve the above-mentioned object, the coma coil system to be connected to the vertical deflection coil includes: 1 coma coil section; and a second coma coil section corresponding to the lower part of the screen, and the first and second coma coil sections are respectively formed by the first and second coils and the diode. A series circuit and a resistor connected in parallel to either one of the first and second coils and the diode are connected in parallel. [Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 7 shows an embodiment of the present invention. One end of the vertical deflection coil 1 3 is connected to the terminal T 1. On the other end of the vertical deflection line 圏 1.-The standard is applicable. National Standard (CNS) A4 (210X297 mm) (Please read the precautions on the back before filling this page)

-8 588555 A7 _B7___ 5. Description of the invention ($, one end of the first coil 1 1 1 a and the third coil 1 1 1 b of the coma coil 1 0 0 are connected together. The other end of the coil 1 1 1 a is The diode D1 is connected in the forward direction to one end of the second coil 111c. The other end of the second coil 1 1 1 c is connected to one end of the coil 1 1 1 f. The other end of the third coil 1 1 1 b It is connected to one end of the fourth line 圏 1 1 1 d by the diode D 2 in the opposite direction. The other end of the fourth coil 1 1 1 d is connected to one end of the coil 1 1 1 f. Here, for The series circuit of the diode D 1 and the wire 1 1 1 1 c is connected in parallel with a resistor R 1. The series circuit of the diode D 2 and the coil llld is connected in parallel with a resistor R 2. The aforementioned wire 圏 1 The other end of 1 1 f is connected to terminal T 2 by wire 圏 1 1 1 e. The above-mentioned coils 1 1 1 a, 1 1 1 b, 1 1 1 d are called Y Η coils, especially the day surface The secondary beam (for the purpose of misconvergence for the upper and lower areas). The coil 11 is also called a VCR coil. It is used to correct the vertical direction of the central beam (green) in the lower area of the electrical part. The misconvergence is provided for its purpose. Figure 8 shows the parts when the above-mentioned coils are configured as the loop portions 1 5 1 and 15 2. 1 5 1 is installed on the side of the crotch, which is biased behind the yoke, The second coma coil part 1 5 2 is the safety part, so that it can correspond to the lower side of the screen. The installation of China National Standard (CNS) A4 specifications (210XM7 mm) (Please read the precautions on the back before filling this page )

111〇 'To correct electric red and cyan) 1 f > 1 1 The sub-beam is to be operated and the sub-beam (the first, second and first comets make it corresponding to the biased yoke as shown in the sub-beam scan) The horizontal direction 1e is printed by the red and blue coma coils on the daytime surface at the rear of the daytime. It is printed by the employee ’s consumer cooperative of the Intellectual Property Office of the Ministry of Economic Affairs-9-588555 A7 ___ _B7 ____ 5 、 Explanation of the invention (). And the coil 1 1 1 is wound in the first coma coil part 1 5 a. (Please read the notes on the back before filling this page) 1 1 1 c, 1 1 1 e, Coils 111b, llld, and lllf are wound around the second coma-coil section 1 52. Diodes and resistors are mounted on the terminal plate 16 shown in FIG. 1, so that they can be formed as shown in FIG. Furthermore, the order of the winding layers of each line in the first and second coma line portions 15 1 and 1 52 is not particularly limited. In this example, there are 3 layers. Structure (especially the winding order is different), but the first layer is configured as llle and lllf as the VCR wire, and the second layer is the first coil 1 1 1 a, 1 1 1 b as the Y Η coil, The third layer is the second coil 1 1 c, 1 1 d of the Y Η coil, and each is individually wound. The operation of the coma coil as described above will be explained. When the upper part of the screen is deflected, The current will flow from left to right in the figure. Therefore, the current I v flowing on the vertical deflection line 圏 1 3 will be divided into the current I u flowing through the coil 1 1 1 a of the upper 1 y coil, and The current I d of the coil 1 1 1 b flowing in the lower part of the first coil 。. It is printed by the consumer cooperative of the Intellectual Property Office of the Ministry of Economic Affairs and the current I u is divided into the diode D 1 and the second part of the upper part. The current I ud of the coil 1 1 1 c of the Y Η coil and the current I ur flowing through the resistor R 1. On the other hand, the current I d hardly flows through the diode D 2 and the second Y Η line in the lower part. The coil 1 1 1 d flows through the resistor R 2 as a current I dr. As a result, the current flowing through the upper coils 1 1 1 a and 1 1 1 c of the diode is turned on. On the lower side coil 1 1 1 b, the national standard 4 ^ 1 ^^ 1 national standard (milk) 8 4 specifications (210 '; < 297 mm) a "--10- Intellectual Property Bureau of the Ministry of Economic Affairs Employee spending Printed by Sakusha 588555 A7 B7 V. The current of the invention (& 1 1 1 d current. Generally, when the coil flows a steeply changing current, a back electromotive force will be generated. When vertical scanning is performed up to the bottom of the screen, it will return to In the initial state, a back-EMF will be generated in the vertical deflection coil, and it will be applied to the circuit as a pulse voltage. At the moment when the pulse caused by the back-EMF is applied, that is, when the upper end of the screen is deflected, the influence of the back-EMF on the coils 1 1 1 a to 1 1 1 f is large. For this reason, although the back electromotive force will be generated in each coil, in fact, the back electromotive force given to the large influencer is caused by the influence of the diode to form the back electromotive force of the lower side coil 1 1 1 b and The back-EMF current of the lower coil 1 1 1 d. For this reason, when the upper end of the day is deflected, the current I u will increase, and I d will decrease toward the direction of the back electromotive force. As shown in FIG. 9, the current will be in the upper end area of the screen. The difference I 3 becomes large. In FIG. 9, the current flowing through the upper coil portion 1 1 1 a is shown as 1 1 a, and the current flowing through the lower coil portion 1 1 1 b is shown as 1 1 b. t is the time axis, and i is the current 値 (A). As a result, the YH correction becomes a straight line, and as a result, a local misconvergence (under-convergence) YH at the upper end of the screen does not occur. When the lower end of the screen is deflected, the Y Η correction of approximately linearity can be performed because it does not have the influence of such back-EMF, so that it can achieve good convergence performance throughout the entire day. In other words, the convergence correction circuit can shape the waveform of the electric wave flowing in the correction coil, so that the magnetic field generated by the correction coil can be arranged, so that the Chinese National Standard (CNS) A4 specification (210X297 mm) can be obtained (please first (Read the notes on the back and fill out this page)

11-Printed by the Consumer Cooperatives of the Intellectual Property Office of the Ministry of Economic Affairs 588555 A7 B7

V. Description of the invention (I has good convergence performance throughout the entire picture. In the above embodiment, although the vertical deflection coil or the v CR coil is used to form a series state for illustration, these coils can be used even in a parallel state. Also It can be used in the same way even if other coils or components are connected. In addition, a ring-shaped vertical deflection line 纒 that directly winds the vertical deflection coil to the magnetic core is shown in FIG. 1 and described as the Y Η correction circuit. The invention can also be applied even when the saddle-shaped vertical deflection is applied to the coil. The present invention is not limited to the above embodiment. Fig. 10 shows another embodiment of the coma coil. The terminal T 1 is connected to the vertical One end of the deflection coil 13 is connected to the other end of the vertical deflection coil 13: the anode of the diode D1; one end of the resistor R1; the cathode of the diode D2; and one end of the resistor R2. The cathode of the diode D1 is connected to the terminal T 2 in series through the coils 1 12c, 1 1 2a, 1 1 2 f, 1 1 2 e. The other end of the resistor R 1 is connected to the coil 1 1 2 c, 1 1 2 a connection point. Two The anode of the pole body D 2 is connected to the connection point of the coils 1 1 2 a and 1 1 2 f by the coils 1 1 2 b and 1 1 2 d in series. The other end of the resistor R 2 is connected to the coil 1 1 The connection points of 2 b and 1 1 2 d. The above-mentioned coil portions 1 1 2 c, 1 1 2 a and 1 1 2 e are formed to correspond to the first coma coil portion 1 5 1 on the upper side of the screen, and the coil 1 1 2b, 1 1 2d, and 1 12 f are formed to correspond to the second coma line ridge portion 1 5 2 on the lower side of the screen. Fig. 1 1 shows a schematic appearance of the first coma coil portion 151. And national standards (CNS> A4 specifications (210X297 mm) (Please read the precautions on the back before filling this page)

-12- 588555 A7 B7 V. Description of the invention () 〇 (Please read the precautions on the back before filling out this page) To manufacture the coil section 1 1 2 C, 1 1 2 a, if the center tap section TP is provided and By continuously winding the coils 1 1 2 c and 1 1 2 a, the first coma coil portion 1 5 1 can be easily manufactured. That is, in this embodiment, when the predetermined number of winding coils is completed, the coil 1 1 2 a is formed, and the connection is used for the center tap to ensure the lead wire, and then continue to obtain the coil 1 1 2 c The formation of the line. The central tap section will be connected to resistor R1. The manufacturing of the second coma coil portion 152 of the other side can be carried out in the same manner. As a result, the center tap (the terminals of the two coils can be connected at the same time) can be connected to the terminal board, which makes the work of manufacturing a coma coil and assembling a bias yoke extremely easy. Even the coma coil as described above can reduce misconvergence in the upper region of the daytime surface, as in the previous embodiment. In this embodiment, the current flowing through the coils 1 2 a and 1 1 2 b can also be changed linearly from the center of the screen to the upper part of the day surface due to the influence of the back electromotive force of the coil. The current difference I 3 shown in FIG. 9. [Effects of Invention] Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs As described above, according to the present invention, it is possible to prevent misconvergence (under-convergence) in the horizontal direction of the Y-axis with a simple structure according to the present invention. [Brief Description of the Drawings] FIG. 1 is an oblique (stereoscopic) view showing the outline appearance of the yoke device viewed from the rear. Figure 2 (A) shows the national standard (0 milk) 8-4 specification (210 father 297 mm) showing the coil portion forming the coma coil of FIG. -13- 588555 11 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (Oblique view. Figure 2 (B) is a perspective view showing the section of the coil forming the coma line 图 of Figure 1. 11 3 (A) is a display showing the wiring including the horizontal deflection line 之Circuit diagram. Figure 3 (B) is a circuit diagram showing the wiring including the vertical deflection line. Figure 4 is an explanatory diagram showing the current relationship between the upper coil portion and the lower coil portion of the conventional coma coil. Fig. 6 is a diagram showing another example of a Y Η correction circuit of a conventional coma coil. Fig. 7 is a circuit diagram showing an embodiment of the present invention. Fig. 8 FIG. 9 is a perspective view showing a rough appearance of each coil of the Υ Υ correction circuit (come coil) of the circuit of FIG. 7 when it is manufactured as a coil part. FIG. 9 shows an upper coil part and a lower wire of the coma coil of the present invention. Explanatory diagram of the current relationship of the unit. Figure 1 0 A circuit diagram showing another embodiment of the present invention is shown in FIG. 11. FIG. 11 is a schematic external view showing a case where a line portion of the Υ correction circuit shown in FIG. 10 is specifically constructed as a coil portion. [Description of Symbols] 5 AJ: Winding pipe "national national standard" (CNS) Α4 specification (210X297 mm) 1 (Please read the precautions on the back before filling this page)

-14-588555 A7 B7 V. Description of the invention () 2 5 B 1 ·· yoke 5 a: Current (coil 1 5 a) (Please read the precautions on the back before filling this page) 5 b: Current (wire 1 5 b) 1 1: Horizontal deflection line 圏 1 1 A: Saddle coil 11B: Saddle coil 1 2: Toroidal core 1 3: Vertical deflection line 圏 1 3 A, 1 3 B: Coil section 1 4: Coil separation Device 15: Comet coil 1 5 a, 1 5 b: Coil (Y Η coil) 1 5 c, 1 5 d: Line coil (VCR coil) 1 6: Terminal board 17: Differential acting coil 1 0 0: Comet Coil 1 1 1 a: Printed by the Consumer Cooperative of the Intellectual Property Office of the Ministry of Economic Affairs 1 1 1 b: 3rd coil 1 1 1 c: 2nd coil 1 1 1 d: 4th coil 1 1 1 e, 1 1 1 f: VCR coil 1 1 1 a to 1 1 1 d: Y Η wire 圏 1 1 2 a to 1 1 2 f: coil 1 1 2 a, 1 1 2 C, 1 1 2 e: 1st comet Shape line 圏 • r4 National Standard (CNS) A4 specification (210X297 mm) -15- Printed by Intellectual Property Bureau of the Ministry of Economic Affairs S Industrial Consumer Cooperatives 588555 A7 B7 V. Description of the invention (: | 3 1 1 2 b, 1 1 2 d, 1 1 2 f: 2nd coma coil 1 5 1: 1st coma line coil (including line coils 1 5 a, 1 5 c) 1 5 2: 2nd coma coil (including coils 1 5 b, 1 5 d) D 1: diode D 1 a: diode D 2: diode D 2 a: diode i: current 値 (A ) I 1: Current difference in the center of the screen I2: Current difference in the periphery of the screen I 3: Current difference R 1: Resistance R 1 a: Resistance R 2: Resistance R 2 a: Resistance t: Time axis T 1, T 2 : Power terminal TP: Center tap I v: Current of vertical deflection coil I u: Current of coil 1 1 1 a I d: Current of coil 1 1 1 b I dr: Current of resistor R 2 I ud: Coil 1 1 Current of 1 c I ur: Current of resistor R 1 National J (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page)

-16-

Claims (1)

588555 A8 B8 C8 D8 VI. Patent Application Range 1 Patent Application No. 9 1 1 1 7204 Chinese Application Patent Range Amendment March 5, 1993 Revision 1 · A deflection yoke device, characterized by: To be connected to a vertical deflection The coma coil of the coil has: a first coma coil portion corresponding to the upper portion of the screen; and a second coma coil portion corresponding to the lower portion of the screen, and the aforementioned first and second coma coil portions are each caused by: A series circuit formed by the first and second coils and diodes; and a resistor connected in parallel to either one of the first and second coils and the diodes to form a parallel resistor. 2. The bias yoke device according to item 1 of the scope of patent application, wherein the center tap is taken out between each of the first and second coils to form the first and second coma coil portions, and the winding coil is continuously implemented. . 3. The deflection yoke device according to item 1 of the scope of patent application, wherein the aforementioned vertical deflection coil is a toroidal type. 4. The deflection yoke device according to item 1 of the patent application range, wherein the aforementioned vertical deflection coil is a saddle type (pillow type). 5. The biased yoke device according to item 1 of the patent application range, wherein the series circuit includes: a first series circuit included in the first coma coil portion; and a first series circuit included in the second coma coil portion. 2 series circuit, the aforementioned first series circuit is a series circuit formed by the first coil, the first diode, and the second coil. This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (please Please read the precautions on the back before filling this page} Order printed by the Intellectual Property Bureau of the Ministry of Economic Affairs's Consumer Cooperatives to print 588555 'f is being replaced: page 丨 in the disaster C8 W year A £ 1 jr Gi D8 6. Application for patent scope 2 The series circuit is a series circuit formed by the third coil, the second diode, and the fourth coil. (Please read the precautions on the back before filling out this page.) The aforementioned first and second bipolar systems are in opposite directions to each other. 6 · The bias yoke device according to item 1 of the patent application range, wherein the series circuit includes: the first series circuit included in the first coma coil section; and the first series circuit included in the second coma coil section. 2nd series circuit, The first series circuit is a series circuit of the first diode and the first and second coils, and the second series circuit is a series circuit of the second diode and the third and fourth coils. Part of the second series circuit, each of which is connected in parallel with the first and second resistors. 7. A kind of deflection fan device, which has: a vertical deflection coil to be arranged on the outer periphery of the neck of the color Braun tube; connection The first coma coil part corresponding to the vertical deflection coil and corresponding to the upper part of the screen of the color white tube; and the second coma coil part connected to the vertical deflection coil and corresponding to the lower part of the screen. The yoke device is characterized in that the aforementioned first and second coma coil sections each have at least: a series circuit formed by the first coil and the diode printed by the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs; The circuits are connected in parallel; each is connected to the series circuit, and a second electromotive force is generated when a predetermined pulse voltage is applied to the vertical deflection circuit, and the second coil can at least correct the current of the first coil. This paper scale applicable Chinese National Standard (CNS) A4 size (210X297 mm) · 2 588 555 Patent Application No. 6 March 1993 (4/6) Figure 6 Figure 7 100