CN2893909Y

CN2893909Y - Cathode-ray tube electronic gun magnetic field controller assembly

Info

Publication number: CN2893909Y
Application number: CN 200520047917
Authority: CN
Inventors: 刘仙娟
Original assignee: SHANGHAI NOVEL COLOR PICTURE TUBE CO Ltd
Current assignee: SHANGHAI NOVEL COLOR PICTURE TUBE CO Ltd
Priority date: 2005-12-23
Filing date: 2005-12-23
Publication date: 2007-04-25
Anticipated expiration: 2015-12-23

Abstract

The utility model relates to a magnetic field control component for the CRT electron gun, in particular to a field control component for adjusting the magnetic field where the center electron beam is positioned on. The utility model provides a magnetic field control component for the electron gun, which comprises a convergence ring, a magnetic field controller, a central hole arranged in the center of the convergence ring, and two side holes which are symmetrically arranged on either side of the central hole respectively; wherein two magnetic field controller are symmetrically arranged on either side of a line, on which center points of the central hole and two side holes are positioned. The utility model adjusts angle of deflection of the intermediate electron beam through adjusting the magnetic field of the intermediate electron beam of the colour cathode ray tube, thereby converging three electron beams in each points on the screen and providing an excellent display effect of colour image. The utility model has the advantages of powerful adjustability and low cost.

Description

The cathode-ray tube electron gun magnetic field controller assemblies

Technical field

The utility model relates to a kind of cathode-ray tube electron gun magnetic field controller assemblies, relates in particular to a kind of field controller assembly of adjusting magnetic field, center electron beam place.

Background technology

As shown in Figure 1, color cathode ray tube generally comprises the glass bulb 15 of electron gun 11, electron lens 12, deflection system 13 and high vacuum.Electron beam is produced by electron gun 11, and three cathod system H in the electron gun 11 are converged to the three beams electron beam under the effect of electron lens 12, and under the effect in the magnetic field of the variation that deflection system 13 produces, to all directions deflection.If the magnetic field that deflection system 13 produces is that the three beams electron beam is converged to a luminous point thus in the same angle of synchronization deflection on screen 15 uniformly, a plurality of these type of luminous points have also formed image.Problem is that deflection system 13 is uneven often, and the three beams photon beam can not reach good converged state thus, thereby influences the quality of colour picture image.See also Fig. 2, Fig. 2 is the field controller assembly of prior art.As shown in the figure, this assembly adopts the field controller 21 of both sides bundle, play limit bundle magnetic shunt effect, adjust the magnetic flux density in bundle zone, color cathode ray tube limit, thereby adjust the deflection angle of limit beam electrons bundle, three electron beams can be focused at together on screen, but there is the drawback that adjustment capability is improper, influence focusing performance and increase cost of manufacture in this method everywhere.

The utility model content

The purpose of this utility model is to provide a kind of electron gun magnetic field controller assemblies, makes three electron beams to be focused at together on screen everywhere, and adjustment capability is stronger simultaneously, and cost of manufacture is lower.

The utility model provides a kind of electron gun magnetic field controller assemblies, comprise assembly cup, magnetic field controller and be positioned at mesopore and two described relatively mesopores at described assembly cup center centrosymmetric lateral opening, the described mesopore and the described two lateral opening centers of circle are in a straight line, it is characterized in that, the straight line symmetry that described relatively mesopore of described two field controllers and hole, both sides form, and the relative vertical straight line symmetry of straight line that forms with described mesopore and hole, both sides of described two field controllers itself.

In above-mentioned electron gun magnetic field controller assemblies, described field controller is shaped as rectangle, the straight line parallel that the long limit of described rectangle and described mesopore and hole, both sides form.

In above-mentioned electron gun magnetic field controller assemblies, described field controller is shaped as trapezoidal, the described trapezoidal last bottom and the straight line parallel of described mesopore and the formation of hole, both sides.

In above-mentioned electron gun magnetic field controller assemblies, the long limit of described field controller can be focused at together three electron beams everywhere to the deflection angle of described mesopore electron beam on screen, reach good coloured image display effect thus.Advantage of the present utility model is that its adjustment capability is strong and cost of manufacture is low.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail, wherein:

Fig. 1 is the internal structural map of cathode ray tube;

Fig. 2 is the field controller assembly of prior art;

Fig. 3 is a plane graph of the present utility model;

Fig. 4 A is an embodiment of field controller of the present utility model;

Fig. 4 B is another embodiment of field controller of the present utility model.

Embodiment

See also Fig. 3, Fig. 3 is a plane graph of the present utility model.The electron gun magnetic field controller assemblies, between color cathode ray tube and screen, it comprises assembly cup 31, it is centrosymmetric lateral opening 34 and 36 to be positioned at the relative mesopore of the mesopore 35 at assembly cup 31 centers and two 35, and above-mentioned three holes can make the three-beam electron-beam of cathode ray tube see through.If the straight line in the center of circle in described three holes of process is made as the x axle, the straight line vertical with described x axle is made as the y axle, the utility model also comprises two relative with 33 x axial symmetry of being made by the stainless steel material that has magnetic with 33, two field controllers 32 of field controller 32, and itself is with respect to the y axial symmetry.

Field controller 32 and 33 effect are to adjust the magnetic flux density in the magnetic field of beam electrons bundle in the color cathode ray tube, thus the deflection angle of beam electrons bundle in adjusting, and the beam electrons bundle is consistent with the deflection angle of both sides beam electrons bundle in making.If the long limit of field controller 32 and 33 is b to the beeline in the center of circle of described mesopore, field controller 32 and 33 side are a to the longest distance of y axle place straight line, when b＞a (for example the scope of b is 3-6mm, and a is 2-3mm), field controller 32 and 33 can reach effect preferably.

Now see also Fig. 4, Fig. 4 A is an embodiment of field controller of the present utility model, and Fig. 4 B is another embodiment of field controller of the present utility model.

Shown in Fig. 4 A, parts magnetic field controller of the present utility model can be rectangle, the long limit c of described rectangle and the straight line parallel at x axle place, and the length range of the long limit c of rectangle is 3-6mm, the length range of its minor face d is 2-4mm.

Shown in Fig. 4 B, parts magnetic field controller of the present utility model also can be trapezoidal, the described trapezoidal last following e and the straight line parallel at f and x axle place, and the length range of trapezoidal long limit e is 3-6mm, the length range of its minor face f is 1-3mm, and the scope of its high g is 3-5mm.

Should be understood that the foregoing description only gives an example for convenience of description, for example the concrete shape of the embodiment of field controller, size own with and be not restriction in the relative position size of field controller assembly to scope of the present utility model.For the general personnel in present technique field, can under the situation that does not break away from spirit of the present utility model, make many variations.Therefore, the scope advocated of the utility model should be as the criterion so that the claim in claims is described.

Claims

1. electron gun magnetic field controller assemblies, comprise assembly cup, magnetic field controller and be positioned at mesopore and two described relatively mesopores at described assembly cup center centrosymmetric lateral opening, the described mesopore and the described two lateral opening centers of circle are in a straight line, it is characterized in that, the straight line symmetry that described relatively mesopore of described two field controllers and hole, both sides form, and the relative vertical straight line symmetry of straight line that forms with described mesopore and hole, both sides of described two field controllers itself.

2. electron gun magnetic field controller assemblies as claimed in claim 1 is characterized in that described field controller is shaped as rectangle, the straight line parallel that the long limit of described rectangle and described mesopore and hole, both sides form.

3. electron gun magnetic field controller assemblies as claimed in claim 1 is characterized in that described field controller is shaped as trapezoidal, the described trapezoidal last bottom and the straight line parallel of described mesopore and the formation of hole, both sides.

4. electron gun magnetic field controller assemblies as claimed in claim 1 is characterized in that, the long limit of described field controller to the beeline in the center of circle of described mesopore greater than the side of described field controller longest distance to y axle place straight line.