CN2847520Y

CN2847520Y - Deflection coil

Info

Publication number: CN2847520Y
Application number: CN 200520079469
Authority: CN
Inventors: 胡战利
Original assignee: Irico Group Electronics Co Ltd
Current assignee: Irico Group Electronics Co Ltd
Priority date: 2005-09-30
Filing date: 2005-09-30
Publication date: 2006-12-13
Anticipated expiration: 2015-09-30

Abstract

The utility model discloses a deflection coil, which comprises vertical coil, wherein a main winding of the vertical coil is provided with an auxiliary winding and the magnetic field direction formed by the auxiliary winding is opposite to the magnetic field direction of the main winding. The auxiliary winding is symmetrically distributed with taking the center of the main winding as a symmetrical point, the auxiliary winding can be divided into two sections and can be symmetrically distributed at any part of the main winding with taking the center of the main winding as a symmetrical point. Owing to the reversal auxiliary winding arranged on the vertical coil winding, local counter magnetic field formed by the reversal auxiliary winding can change the local converge state of pictures. The utility model can conveniently adjust and correct the YH value in the converge characteristic of the deflecting coil, and the utility model avoids possible deterioration caused by other converge characteristics (such as PQH value, PQV value, SV value, etc.).

Description

A kind of deflecting coil

Technical field

The utility model belongs to color picture tube/display tube deflecting coil and makes the field, and specifically a kind of vertical coil is provided with the deflecting coil of auxiliary reverse winding.

Background technology

In deflecting coil design or manufacture process, the vertical winding of deflecting coil is generally the single direction coiling.Only by the adjustment of opposing connection component cloth, the scanning magnetic field shape that design obtains expecting, make the convergence characteristics of picture, particularly the YH value satisfies specification requirement.

But distribute when adjusting the YH value by winding, can cause the variation of convergence characteristics value PQH, PQV, SV usually, and this variation is (the convergence characteristics deterioration) do not expected sometimes.At present ways of addressing this issue is, takes into account between YH value and PQH, PQV, SV value, has increased the difficulty of design or manufacturing, and effect also often can not meet the demands.

Summary of the invention

The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, a kind of deflecting coil is provided, can accomplish only the YH value to be adjusted, and can not cause PQH, PQV, the variation do not expected takes place in characteristic such as SV value, is convenient to improving of whole picture convergence characteristics.

For achieving the above object, the technical solution adopted in the utility model is: comprise vertical coil, be provided with auxiliary winding on the main winding of vertical coil, the magnetic direction that auxiliary winding forms is opposite with the magnetic direction of main winding.

Said auxiliary winding is that symmetric points are symmetrically distributed with the center of main winding.

Said auxiliary winding can be divided into two sections, is the arbitrary portion that symmetric points are symmetrically distributed in main winding with the center of main winding.

Because vertical coil winding of the present utility model is provided with oppositely auxiliary winding, the local opposing magnetic field of its formation can change the local convergence state of picture, particularly can adjust easily, revise the YH value in the deflecting coil convergence characteristics.The utility model increased a kind of new adjustment YH (convergence errors of both sides bundle horizontal direction on the Y-axis) value by way of, when having the YH of adjustment value simultaneously, other convergence characteristics such as PQH (convergence errors of four jiaos of both sides bundle horizontal directions), PQV (convergence errors of four jiaos of both sides bundle vertical direction), S1V (convergence errors of four least bit both sides bundle vertical direction) etc. are influenced less advantage.

Description of drawings

Fig. 1 overall structure schematic diagram of the present utility model;

Fig. 2 (a) is vertical coil Distribution of Magnetic Field figure of the present utility model

Fig. 2 (b) is converged state figure of the present utility model.

Embodiment

Below in conjunction with the accompanying drawing example structural principle of the present utility model and operation principle are described in further detail.

Referring to shown in Figure 1, the utility model comprises deflecting coil body 1, on the basis of the forward main winding 3 of vertical coil 2, is provided with oppositely auxiliary winding 4.Auxiliary winding 4 is that symmetric points are symmetrically distributed with the center of main winding 3.Auxiliary winding 4 can be divided into two sections, is the arbitrary portion that symmetric points are symmetrically distributed in main winding 3 with the center of main winding 3.

Owing to form local opposing magnetic field during auxiliary winding 4 work, can change the local convergence state of picture, particularly can adjust easily, revise the YH value in the deflecting coil convergence characteristics, increased a kind of new adjustment YH value by way of.When this kind approach had the YH of adjustment value simultaneously, to less advantages of influence such as other convergence characteristics such as PQH, PQV, S1V, the improvement of being convenient to whole picture convergence characteristics improved.

Shown in Fig. 2 (a), auxiliary winding 4 produces local pincushion field, is superimposed upon on the barrel field of main winding 3, makes local magnetic field, and vertical coil 2 middle bodies change to the pincushion direction.R, G, B represent red, green, blue three-color electron beam respectively.

Shown in Fig. 2 (b), provided electron beam among the figure in deflection, the magnetic line of force direction of its present position.Under the effect of the magnetic core logical circuit deflection power of assisting winding 4, the YH value changes to positive direction.Thereby realized only the local convergence state (YH) of picture being adjusted, and the impregnable substantially purpose of the converged state of other point.R, G, B represent red, green, blue three-color electron beam respectively.

Auxiliary winding 4 is arranged on the central part of main winding 3.When auxiliary winding 4 is arranged on other symmetric position of main winding 3, correspondingly, can obtain different adjustment effects to each convergence characteristics value, can specifically use according to assembling the adjustment target in design, the manufacture process.

Claims

1, a kind of deflecting coil comprises vertical coil (2), it is characterized in that: be provided with auxiliary winding (4) on the main winding (3) of vertical coil (2), the magnetic direction that auxiliary winding (4) forms is opposite with the magnetic direction of main winding (3).

2, deflecting coil according to claim 1 is characterized in that: said auxiliary winding (4) is that symmetric points are symmetrically distributed with the center of main winding (3).

3, deflecting coil according to claim 1 is characterized in that: said auxiliary winding (4) can be divided into two sections, is the arbitrary portion that symmetric points are symmetrically distributed in main winding (3) with the center of main winding (3).