CN2760747Y

CN2760747Y - Deflection coil edging beam static convergence correcting device

Info

Publication number: CN2760747Y
Application number: CN 200520078273
Authority: CN
Inventors: 胡卫东
Original assignee: Irico Group Electronics Co Ltd
Current assignee: Irico Group Electronics Co Ltd
Priority date: 2005-01-24
Filing date: 2005-01-24
Publication date: 2006-02-22
Anticipated expiration: 2015-01-24

Abstract

The utility model relates to a deflection coil edging beam static convergence correcting device, which comprises a deflecting coil body and an isolator arranged on the deflecting coil body, wherein the isolator is provided with a couple of constant magnetic bodies and the constant magnetic bodies are arranged on a neck of the deflecting coil near an electron gun transmitting position. A quadrupole magnetic field of the utility model is arranged near the electron gun transmitting position, and the electron beam can firstly applied with the action of the quadrupole magnetic field when stroke out. According to the action principle of the magnetic field, two side beams of the electron beam can be applied with the action of different directional magnetic field force, so the two side beams can be separated, therefore the utility model can attain the purpose of correcting the edging beam static convergence of the deflecting coil.

Description

A kind of deflecting coil limit bundle static convergence correction device

Technical field

The utility model belongs to color picture tube/display tube deflecting coil manufacturing and final assembly field, specifically is installed in the deflecting coil limit bundle static convergence correction device on color picture tube/display tube deflecting coil in color picture tube/display tube deflecting coil manufacture process.

Background technology

In low-cost picture tube design, because the under convergence phenomenon of static convergence causes OCV not meet design requirement, usually, can reach requirement by adjusting electron gun structure or changing mask design, but so not only can increase the cost of pipe, and can delay the design cycle of homogeneous tube.

Summary of the invention

The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, and a kind of deflecting coil limit simple in structure, easy for installation bundle static convergence correction device is provided.

For achieving the above object, the technical solution adopted in the utility model is: comprise deflecting coil body and the isolator that is arranged on the deflecting coil body, be characterized in, a pair of permanent magnet is installed on isolator, said permanent magnet is positioned at the neck of deflecting coil near electron gun transmitting site place.

Another characteristics of the present utility model are: the permanent magnet symmetry is installed on the isolator.

Because quadripolar magnetic field of the present utility model is installed near electron gun emission place, when electron beam is got, at first be subjected to the quadripolar magnetic field effect, according to the action of a magnetic field principle, electron beam both sides bundle is subjected to the magnetic field force effect of different directions, make the both sides bundle produce separation, thereby reach the purpose of correction deflector coil side bundle static convergence.

Description of drawings

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

Fig. 2 is the partial enlarged drawing of Fig. 1;

Fig. 3 is a deflecting coil of the present utility model limit bundle static convergence correction schematic diagram.

Embodiment

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

Referring to Fig. 1,2, the utility model comprises deflecting coil body 4 and the isolator 2 that is arranged on the deflecting coil body 4, on isolator 2, be symmetrically installed with a pair of permanent magnet 1, this permanent magnet 1 is positioned at electron gun emission place of the neck 3 of deflecting coil, and this forms quadripolar magnetic field to 1 pair of color picture tube of permanent magnet/show tube electron gun institute electrons emitted bundle.

Referring to Fig. 3, because permanent magnet 1 is installed near electron gun emission place and has formed quadripolar magnetic field, when electron beam is got, at first be subjected to permanent magnet 1 quadripolar magnetic field effect, according to the action of a magnetic field principle, the both sides bundle of electron beam is subjected to the magnetic field force effect of different directions, makes the both sides bundle produce separation, thereby reaches the purpose of correction deflector coil side bundle static convergence.

The utility model is fixed on the tapering of deflecting coil isolator neck by color picture tube/display tube with quadripolar magnetic field, solved the bad problem of OCV of homogeneous tube design, and have easy and simple to handle, accurate positioning, solid and reliable, advantages such as the clean and tidy standard of outward appearance help the use of homogeneous tube and the manufacturing of deflecting coil.

Claims

1, a kind of deflecting coil limit bundle static convergence correction device, comprise deflecting coil body [4] and be arranged on isolator [2] on the deflecting coil body [4], it is characterized in that: a pair of permanent magnet [1] is installed on isolator [2], and said permanent magnet [1] is positioned at the neck [3] of deflecting coil near electron gun transmitting site place.

2, deflecting coil according to claim 1 limit bundle static convergence correction device, it is characterized in that: said permanent magnet [1] symmetry is installed on the isolator [2].