JPH0419905Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is a convergence device for color cathode ray tubes used in color television receivers or color monitor devices in which a plurality of electron guns are arranged in-line. Regarding.

<Prior art> In a conventional in-line color cathode ray tube convergence device, four poles and six
A dynamic convergence ring-shaped coil is used, which is a toroidally wound 4-pole or 6-pole coil that generates a magnetic field. The convergence was adjusted by moving the electron beams on both sides of the array in the vertical and horizontal directions.

<Problems to be solved by the invention> However, in such a conventional configuration, the coil is wound using a ring-shaped core, and the coil is wound on the color cathode ray tube neck in close proximity to the convergence device. The ring-shaped core shields the rear side leakage flux that contributes to the deflection generated by the attached deflection yoke (a loop is created by leakage flux within the ring-shaped core), and as a result, horizontal and vertical There was a problem in that the magnetic path length of the deflection coil and the deflection center position changed, which adversely affected the deflection characteristics and made it difficult to obtain good screen characteristics. In addition, coils for generating 4-pole and 6-pole magnetic fields are wound toroidally around a ring-shaped core, which makes the winding work complicated and time-consuming, and there are also problems in that it is not easy to assemble. Ta.

<Means for solving the problems> In order to solve the above problems, the color cathode ray tube convergence device of the present invention has a coil bobbin attached to each of the 12 rod-shaped cores, and a coil is wound around each coil bobbin. The constructed 12 solenoids are arranged concentrically in the radial direction with respect to the board attached to the in-line type color cathode ray tube network, and the solenoid coils are used to place the 12 solenoids on both sides of the electron beam arranged in-line. 4 poles made by moving the positioned beam vertically and horizontally,
It generates a six-pole magnetic field.

<Example> Hereinafter, an example of the convergence device for a color cathode ray tube according to the present invention will be described in detail with reference to the drawings. In FIG. 1, reference numeral 1 denotes a case holder made of an insulating material, and is composed of a main part 1a having a bottomed cylindrical shape with one side open, and a fixing part 1b extending in the axial direction from the bottom surface of the main part 1a. A dynamic convergence device 2 is housed and fixed inside the fixed part 1a, and on the outer periphery of the fixed part 1b, there are rings for building and static convergence magnetized into pairs of 2-pole, 4-pole, and 6-pole, respectively. The magnets 3, 4, 5 are rotatably attached to the fixed part 1b, and the ring magnets 3, 4, 5 are rotatably attached to the fixed part 1b.
A locking member 6 is installed to hold and fix the device in an optimal state. At the end of the fixed part 1b of the case holder 1, in which the dynamic convergence device 2 and the ring magnets 3, 4, and 5 are housed and fixed or mounted, the case holder 1 is attached to the cathode ray tube neck part (not shown). Tightening means 7 for fixing in place the
is attached. The dynamic convergence device 2 housed and fixed in the case holder 1 is a second
As shown in the figure, the 12 solenoids 8 ₁ to 8 ₁₂ are connected to a board 9 which has a neck insertion hole S formed in the center and is locked and fixed in the main part 1a by a locking pawl K formed in the main part 1a. They are arranged concentrically at approximately equal angular intervals in the radial direction. Here, the 12 solenoids 8 ₁ to 8 ₁₂ each have a cylindrical rod-shaped core 10, a coil bobbin 11 that stores the rod-shaped core 10 inside, and a coil bobbin 1, as shown in FIG.
1, each consisting of two sets of 4-pole and 6-pole magnetic field generating coils 12 wound around the outer circumference of the coil 1, and fixed to the substrate 10 via one end 13a of a terminal 13 attached to a coil bobbin 11. be done. solenoid 8
The coil bobbin 11 forming a part of ₁ to 8 ₁₂ is the first,
It is constructed by joining and integrating the second coil bobbin bodies 11 ₁ , 11 ₂ , and each coil bobbin body 11 ₁ , 11 ₂ has the aforementioned terminal (substantially L-shaped) 13
is implanted (inserted) and fixed, while the coil 12 is
For the first and second coil bobbin bodies 11 ₁ and _{11 2 ,} as _shown in FIG.
A set of six-pole magnetic field generating coils 12 ₃ and 12 ₄ are respectively selected and wound at predetermined positions. In addition, in Fig. 2, 14 is the solenoid 8 ₁
8 ₁₂ as appropriate, and are led out from the lead outlet 15 formed in the main portion 1a of the case holder 1. Also, 1
6 is a lead wire clamper attached to the lead outlet 15.

In the convergence device for a color cathode ray tube having such a configuration, a coil 12 ₁ for generating a quadrupole magnetic field,
The magnetic field generated by 12 ₂ is as shown in FIGS. 5A and 5B, and as a result, among the three electron beams I, . The magnetic fields generated by the six-pole magnetic field generating coils 12 ₃ and 12 ₄ are shown in C and D in the same figure. As a result, among the three electron beams I,, the electron beams I located on both sides are moved and adjusted in opposite directions (rightward and leftward in the example shown), and the final The convergence of the electron beams I, . is adjusted. On this occasion,
Coils 12 ₁ to 12 ₄ for generating 4-pole and 6-pole magnetic fields are the first and second coil bobbin bodies 1 of the coil bobbin 11.
1 ₁ , 11 ₂ are wound individually on the coil bobbin bodies _{11 1} , _{11 2 in} parallel with each other. The coils 12 ₃ and 12 ₄ do not overlap on the coil bobbin 11, and the coils 12 ₁ to 1
Interference between 2 and ₄ is significantly reduced, and good and stable convergence adjustment is always achieved.

In addition, in the convergence device of the present invention, the 4 volts generated by each coil of each solenoid
The polarity of the pole and hexapole magnetic field is not limited to that shown in the example, and can be changed to a polarity in the opposite relationship to that in the example as necessary by changing the connection relationship or the direction of the current flowing through the coil. By changing the polarity, the moving direction of the electron beam can also be changed.

<Effects of the Invention> The convergence device for color cathode ray tubes of the present invention has been described in detail above, and produces the following effects. In other words, according to the convergence device of the present invention, 12 independent solenoids are used to generate 4-pole and 6-pole open magnetic fields from each solenoid to adjust convergence. The convergence device does little to shield the rear leakage flux generated by the deflection yoke, which is mounted closely on the color cathode ray tube neck (the rod-shaped core of each solenoid forms an open magnetic path). Therefore, the magnetic path lengths and deflection center positions of the horizontal and vertical deflection coils do not change, and good screen characteristics can be obtained without affecting the deflection characteristics. In addition, 12 solenoids arranged at equal angular intervals are used to generate 4-pole and 6-pole magnetic fields, and the 4-pole and 6-pole magnetic fields are equalized for the electron beam (balanced 4-pole, 6-pole magnetic fields). a polar magnetic field is generated),
The movement of the left and right electron beams is adjusted evenly, and as a result, even when the electron gun arrangement is slightly tilted with respect to the horizontal axis (gun rotation), the left and right electron beams can be moved evenly. The applied magnetic field can be kept uniform, and good convergence adjustment can be achieved.
In addition, 4 for 12 independent coil bobbins
It winds a coil for generating a pole or 6-pole magnetic field.
Compared to a method in which a coil is wound around a ring-shaped core, the winding work is simpler and simpler, saving time and effort, and the solenoid only needs to be fixed to the board, making assembly easier.

[Brief explanation of the drawing]

Fig. 1 is a side view of a color cathode ray tube convergence device according to an embodiment of the present invention, Fig. 2 is a front view of Fig. 1, and Fig. 3 is a partially exploded view of a solenoid also used in the color cathode ray tube convergence device. A perspective view, FIG. 4 is a winding arrangement diagram of a coil for generating a 4-pole and 6-pole magnetic field around a rod-shaped core, and FIG. 5 is a diagram showing the magnetic field and electron beam generated by the coil for generating a 4-pole and 6-pole magnetic field. It is an explanatory diagram showing the state of movement of. 2...Dynamic convergence device, 8
₁ to 8 ₁₂ ... Solenoid, 9... Board, 10...
Rod-shaped core, 11... Coil bobbin, 12, 12 ₁
~12 ₄ ... Coil (4-pole, 6-pole coil for generating magnetic field).

Claims (1)

[Scope of utility model registration request] A coil bobbin is attached to each of the 12 rod-shaped cores, and 12 solenoids are constructed by winding a coil around each of the coil bobbins in a concentric circle with respect to a board attached to an inline type color cathode ray tube neck part. is arranged in the radial direction, and the beams located on both sides of the electron beams arranged in-line by the coil of the solenoid are moved vertically and horizontally to generate a 4-pole and 6-pole magnetic field. A convergence device for color cathode ray tubes.