JPH0122217Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a convergence device for dynamic convergence mounted on an in-line color cathode ray tube network.

In recent years, as a convergence device for dynamic convergence mounted on the neck of an inline color cathode ray tube, a plurality of legs are extended from the inner surface of an annular core toward the center, and a coil is wound on the legs. A device has been developed that generates a magnetic field of a predetermined magnetic pole on the leg piece by attaching it twice and energizing the coil, and converges the electron beam by the action of the magnetic field.
It is being put into practical use.

Conventional convergence devices in this field have two poles, four poles, and
In order to obtain a six-pole convergence magnetic field, the first
As shown in the figure, in the case of two poles, there are four legs 1 on the inner surface.
In the case of 4 poles, the annular core 2 with 8
A toroidal core 4 having a regular leg piece 3 is used, and in the case of six poles, a toric core 6 having 12 leg pieces 5 on the inner surface is used. , 3, 5 with coils 7, 8, 9 wound around them, and as a convergence device C,
As shown in FIG. 2, the cathode ray tube 10 was constructed by arranging annular cores 2, 4, and 6 in the order of 2, 4, and 6 poles from the enlarged portion 10a side and combining them.

However, although such a configuration satisfies the convergence of the electron beams arranged in-line, the configuration uses three annular cores, resulting in an extremely large size.
In addition to increasing the assembly process and increasing costs, the winding work becomes complicated and mass production is not possible because the coils are wound around each leg of the three annular cores. It was hot.

The present invention relates to a convergence device for a color cathode ray tube for dynamic convergence, which aims to eliminate the above-mentioned drawbacks, and in particular, has 12 leg pieces extending toward the center at equal intervals on the inner surface of an annular core. This invention relates to a convergence device in which two sets of 2-pole, 4-pole, and 6-pole coils are wound around each leg piece.

Hereinafter, one embodiment of the convergence device of the present invention will be described in detail with reference to the drawings. In FIG. 3, 11 is a case holder for fixing the convergence device on the cathode ray tube neck;
It is composed of a main part 11a having a bottomed cylindrical shape with one side open and a fixing part 11b consisting of a plurality of tongues continuous to the bottom surface 11a1 of the main part 11a. A convergence device 12 for dynamic convergence is mounted and fixed in the main portion 11a of the case holder 11. As shown in FIG. 4, the convergence device 12 includes an annular core 13 and 12 leg pieces 1 positioned at equal intervals on the inner surface of the core 13 and extending toward the center.
4 to 14 ₁₂ , 2 poles, 4 poles, 6 poles (magnetic field)
The coil 15 is wound around the leg pieces 14 ₁ to 14 ₁₂ to form a coil 15 . Among these, the coil 15 wound on the leg pieces 14 ₁ to 14 ₁₂ is
2 sets of 2-pole, 4-pole, and 6-pole electromagnetic coils 15 each
It is a combination of a to 15f, and two sets of 2
The polar magnet coils 15a and 15b are one set 15.
a, as shown in FIG. 5A, leg pieces 14 ₆ , 14 ₁₂
Five leg pieces 14 located continuously in the circumferential direction excluding
₁ to 14 ₅ and 14 ₇ to 14 ₁₁ are arranged alternately and wound, and the other set 15b is connected continuously in the circumferential direction except for the leg pieces 14 ₃ and 14 ₉ as shown in FIG. 5B. Five leg pieces 14 ₁₀ to 14 ₁₂ , 14 ₁ , 14
₂ and 14 ₄ to 14 ₈ are arranged alternately and wound to form two sets of quadrupole electromagnetic coils 15c and 15d.
As shown in FIG. 6A, one set 15c is separated by two leg pieces _{14 1} , _{14 2 , 14 4 , 14 5 ,} . The other set 15d is arranged alternately and wound around the other set 15d.
As shown in Figure B, three leg pieces 14 ₁₁ , 14 ₁₂ , 14 ₁ , 14 ₂ to 14 ₃ , . . . are located continuously in the circumferential direction.
The two sets of six-pole electromagnetic coils 15e and 15f are arranged alternately and wound around one set 15e.
As shown in FIG. 7A, the leg pieces 14 ₁ , 14 ₃ , 1
4 ₅ , 14 ₇ , 14 ₉ , 14 ₁₁ are arranged alternately every other leg and are wound and mounted, and the other set 15f is attached with leg pieces 14 ₂ , 14 ₄ , as shown in FIG. 7B. 14 ₆ ,
14 ₈ , 14 ₁₀ , and 14 ₁₂ are alternately arranged and wound around every other wire. On this occasion,
Coil 1 for leg pieces 14 ₁ to 14 ₁₂ of core 13
The winding installation for 5a to 15f is a total of 4 for 4 poles and 6 poles.
The coils 15c to 15f of the set are connected to the leg pieces 14 ₁ to 14 ₁₂
After attaching the two sets of coils 15a and 15b for two poles to the coils 15c to 15c for four poles and six poles,
15f (located on the inner diameter side of the leg pieces 14 ₁ to 14 ₁₂ ) and attached to a predetermined position, and the method of winding each coil 15 a to 15 f is as follows: After winding the coils 15a to 15f continuously around all of the pieces 14 ₁ to 14 ₁₂ , only the coils wound on the leg pieces at unnecessary locations (no need to wind the coils) are used as other coils. The leg pieces 14 ₁ to 14 ₁₂ of the coils 15a to 15f described here are
The winding order and winding method are merely examples, and are not restricted in any way.

In the color cathode ray tube convergence device having such a configuration, the two-pole electromagnetic coils 15a, 15
The magnetic field (magnetic pole distribution) generated by b is as shown in Fig _{. 8A and B.} This magnetic field causes three electron beams arranged in-line,
are simultaneously moved and adjusted in the same direction (downward and leftward in the drawing), and the four-pole electromagnetic coils 15c, 1
The magnetic field generated by 5d is as shown in C and D of the same figure, and as a result, three electron beams,
The electron beams located on both sides of the 6-pole electromagnetic coil 1 are moved and adjusted in opposite directions.
The magnetic fields generated by 5e and 15f are shown in E and F in the same figure.
As a result, the electron beams located on both sides of the three electron beams are adjusted to move in the same direction, and the convergence of the electron beams is finally adjusted. It is.

In addition, in the convergence device of the present invention, the polarity of the magnetic field (magnetic pole distribution) generated in each leg piece by each coil is not limited to that shown in the embodiment, and may vary depending on the connection relationship and the polarity applied to the coil. By changing the direction of the current, etc., the polarity can be changed to an inverse relationship to that of the embodiment, if necessary, and along with the change in polarity, the moving direction of the electron beam can also be changed.

As described above, according to the convergence device of the present invention, 12 legs are provided extending toward the center at equal intervals on the inner surface of the annular core, and 2 sets of 2-pole and 4-pole are arranged on each leg. , six-pole coils are arranged and wound alternately in each set, making the device smaller and lighter, simplifying assembly, and reducing costs by reducing the amount of materials used. Since it is only necessary to wrap the coil around the 12 leg pieces,
Winding work is simplified, workability is improved, and mass production is possible. etc., and in addition, two sets of 2
Each set of pole coils is wound using five leg pieces located continuously in the circumferential direction, arranged alternately, and two sets of four legs are wound.
One set of 4-pole coils is arranged and wound alternately using two leg pieces with one leg piece open, and the other set of 4-pole coils are positioned continuously in the circumferential direction. By using three leg pieces arranged alternately and wound, and each set of two six-pole coils arranged and wound alternately every other leg piece, the magnetic field for the electron beam is reduced. The operation is extremely accurate and reliable, the electron beam is moved reliably, and good image quality characteristics are always obtained, making it extremely effective as a convergence device for dynamic convergence.

[Brief explanation of the drawing]

Fig. 1 is an exploded plan view of a conventional convergence device using an annular core, Fig. 2 is a side view of the convergence device mounted on the cathode ray tube net, and Fig. 3 is an exploded plan view of a conventional convergence device using an annular core. A partially transparent perspective view of a color cathode ray tube convergence device according to an embodiment stored in a case holder,
FIG. 4 is a plan view of a convergence device according to an embodiment of the present invention, FIGS. 5A and B are two-pole coils also used in the convergence device, and FIGS. Figures A and B are plan views showing the winding state of the six-pole coil, and Figure 8A.
-F are explanatory diagrams showing the state of the magnetic field generated by the two-pole, four-pole, and six-pole coils and the movement of the electron beam. 12... Convergence device, 13... Annular core, 14 ₁ to 14 ₁₂ ... Leg piece, 15... Coil, 15a, 15b... 2-pole coil, 15c, 1
5d...4-pole coil, 15e, 15f...6-pole coil.

Claims (1)

[Claims for Utility Model Registration] (1) Twelve legs are provided at equal intervals on the inner surface of the annular core, extending toward the center, and two sets of 2-pole, 4-pole, and 6-pole are provided on each of the leg pieces. A convergence device for a color cathode ray tube, characterized in that coils are alternately arranged and wound in each set. (2) Each set of two 2-pole coils is alternately arranged and wound using five leg pieces located continuously in the circumferential direction, and one set of 4-pole coils of two sets of 4-pole coils is wound. The coil is wound using two leg pieces arranged alternately with one leg left open, and the other set of 4-pole coils is wound using three leg pieces placed continuously in the circumferential direction. Utility model registration claim 1 characterized in that each set of two six-pole coils is alternately arranged and wound on every other leg.
A convergence device for a color cathode ray tube as described in .