CN101651075B - Method for designing anode caps of color picture tubes - Google Patents

Abstract

The invention discloses a method for designing anode caps of color picture tubes. The method comprises the following steps: firstly establishing a model coordinates of a color picture tube, wherein point O (0, 0, 0) is the center of the external surface of a screen, the direction of the long side of the screen is X axis, the direction of the short side of the screen is Y axis, and the direction vertical to the external surface of the screen is Z axis; secondly adjusting declination angle beta which is more than 110 degrees and less than 120 degrees; finally moving the position of the anode cap to the X axis from the Y axis, or to the position which is within plus or minus 50mm far away from the X axis and is 30mm to 100mm from a sealing-in surface. The method solves the problem that no space on the Y axis of the short axis of a glass cone is left for placing the anode cap caused by increase of the declination angle beta and the problem that striking arc can be easily caused if the anode cap is close to the sealing-in surface and discharging can be caused if the anode cap is close to inner shield.

Description

A kind of method for designing of anode caps of color picture tubes

Technical field

The invention belongs to the color picture tube technical field, be specifically related to a kind of method for designing of anode caps of color picture tubes.

Background technology

Generally speaking, chromoscope all is to bore the device that constitutes by rectangular panel and with the glass that this panel links into an integrated entity, and its accessory also has electron gun, inclined to one side coil and explosion-proof band.Color picture tube is inboard at this panel, constitutes the rectangle fluorescent film by blue, green, red phosphor strip or phosphor dot.Corresponding with this fluorescent film, with the corresponding rectangle scope of the demonstration effective range of rectangle picture in, be assemblied in the rectangular shadow mask that has many apertures on the panel inwall.The electron gun of emission look electron beam R, G, B is housed in the neck inboard of glass awl in addition.The electron beam R, G, the B that are emitted by electron gun carry out deflection through horizontal deflection magnetic field that deflecting coil produced and the vertical deflection magnetic field that is assemblied in the glass awl outside; Select through shadow mask again; Wherein a part of electron beam scans back color image display with horizontal direction and vertical direction to the fluorescent film through shadow mask hole.

In slim color picture tube design process, the design of anode cap is one of very important design, and it is the interface of outer electrode and the interior conducting of pipe, has only the rational anode cap of design science, just can make homogeneous tube stable performance, electric property reach designing requirement.Generally set up colorful visualization tube model coordinate time, some O (0,0,0) is screen outer surface center; The direction on the long limit of screen is the X axle, and the direction of screen minor face is the Y axle, is the Z axle perpendicular to the direction of shielding outer surface, and deflection angle is when the design of the common picture tube anode cap below 110 °; General anode cap is all on the Y axle, at least apart from more than the 60mm of deflecting coil position, more than sealing surface 50mm; Because the deflection angle of common tube is smaller, the total length of picture tube is long, and the space nargin of the placement of anode cap position during design is bigger; All surpass more than the 60mm apart from coil and sealing surface, but along with color picture tube develops to slimming, deflection angle is increasing; Sealing surface is more and more littler to the distance of coil, if near apart from sealing surface, causes sparking easily; If near, will cause discharge apart from inner shield.

Summary of the invention

In order to overcome the shortcoming of above-mentioned prior art; The object of the present invention is to provide a kind of method for designing of anode caps of color picture tubes, cause closely easily that apart from sealing surface sparking closely will cause the problem of discharge apart from inner shield if this method can solve anode cap.

In order to achieve the above object, the technical scheme of the present invention's employing is: a kind of method for designing of anode caps of color picture tubes may further comprise the steps:

The first step is set up colorful visualization tube model coordinate, and some O (0,0,0) is screen outer surface center, and the direction on the long limit of screen is the X axle, and the direction of screen minor face is the Y axle, is the Z axle perpendicular to the direction of shielding outer surface,

In second step, adjustment is positioned at deflection angle β angle to 110 °＜β＜120 ° on the Z axle,

The 3rd step, with the position of anode cap from y-axis shift to the X axle, or in X axle ± 50mm, and be 30mm to 100mm apart from the distance of sealing surface 7.

Since the position of anode cap from y-axis shift to the X axle; Or in X axle ± 50mm; And the distance apart from sealing surface is 30mm to 100mm, and enough spaces are arranged on the X axle, has solved deflection angle β angle and has become ambassador's glass is bored does not have space placement anode cap on the 3 minor axis Y axles problem; Thereby it is near apart from sealing surface 7 to have solved anode cap, causes sparking easily; If near, will cause the problem of discharge apart from inner shield 6.

Description of drawings

Fig. 1 is a colorful visualization tube model coordinate sketch map of the present invention.

Fig. 2 is a deflection angle β of the present invention angle sketch map.

Embodiment

Below in conjunction with accompanying drawing content of the present invention is elaborated.

Referring to Fig. 1,2, a kind of method for designing of anode caps of color picture tubes may further comprise the steps: the first step, set up colorful visualization tube model coordinate; Point O (0,0,0) is screen outer surface center, and the direction on the long limit of screen is the X axle; The direction of screen minor face is the Y axle, is the Z axle perpendicular to the direction of shielding outer surface

In second step, adjustment is positioned at deflection angle β angle to 110 °＜β＜120 ° on the Z axle,

The 3rd step, with the position of anode cap from y-axis shift to the X axle, or in X axle ± 50mm, and be 30mm to 100mm apart from the distance of sealing surface 7.

The height of such design glass screen 1 does not almost change, and the length of glass awl 3 shortens more than the 100mm than conventional length, and general anode position will be examined with the space selection and meet the following conditions: one, anode cap apart from sealing surface 7 greater than more than the 30mm; Its two, anode cap apart from inner shield 6 greater than more than the 30mm.If to ultra-thin pipe anode cap is placed on the Y axle, anode cap just less than 30mm, can cause sparking apart from the distance of sealing surface 7, simultaneously apart from the distance of inner shield 6 also less than 30mm, also can cause discharge.

In the accompanying drawing: O is screen outer surface center point, and X is the direction on the long limit of screen; Y is the direction of screen minor face; Z is the direction perpendicular to the screen outer surface; 1 is the glass screen; 2 is shadow mask; 3 are the glass awl; 4 is deflecting coil; 5 is electron gun; 6 are inner shield; 7 is sealing surface; R is a lycid striation electron beam; G is green fluorescent bar electron beam; B is blue fluorescent bar electron beam.

Below in conjunction with specific embodiment the present invention is further described.

Embodiment one

With the ultra-thin pipe of 40cmPF is example, and a kind of method for designing of anode caps of color picture tubes may further comprise the steps:

The first step is set up colorful visualization tube model coordinate, and some O (0,0,0) is screen outer surface center, and the direction on the long limit of screen is the X axle, and the direction of screen minor face is the Y axle, is the Z axle perpendicular to the direction of shielding outer surface,

In second step, adjustment is positioned at the deflection angle β angle to 115 ° on the Z axle,

The 3rd step, with the position of anode cap from y-axis shift to the X axle, and be 32.5mm apart from the distance of sealing surface 7.

Designed anode cap and traditional identical all being placed on the Y axle originally, but because the glass of this pipe awl 3 is bored 3 short 120mm than the glass of traditional 40cmPF pipe, glass awl 3 there are not on the Y axle enough spaces to place anode cap; Anode cap is 20mm apart from the distance of sealing surface 7; And because the shape problem of glass awl 3, dielectric has no idea to apply, and is simultaneously also near apart from inner shield 6; For about 20mm, can cause discharge.

Embodiment two

With the ultra-thin pipe of 54cm is example, and a kind of method for designing of anode caps of color picture tubes may further comprise the steps:

The first step is set up colorful visualization tube model coordinate, and some O (0,0,0) is screen outer surface center, and the direction on the long limit of screen is the X axle, and the direction of screen minor face is the Y axle, is the Z axle perpendicular to the direction of shielding outer surface,

In second step, adjustment is positioned at the deflection angle β angle to 116 ° on the Z axle,

The 3rd step, with the position of anode cap from y-axis shift to the X axle, and be 48.5mm apart from the distance of sealing surface 7.

If by conventional anode cap design, be placed on the Y axle, though anode cap is 35mm apart from the distance of sealing surface 7, can meet the demands, near apart from inner shield 6, be 25mm, can cause discharge.

In sum; Because the position of anode cap to the X axle, has enough spaces from y-axis shift on the X axle, solved deflection angle β angle and become ambassador's glass is bored does not have space placement anode cap on the 3 minor axis Y axles problem; Thereby it is near apart from sealing surface 7 to have solved anode cap, causes sparking easily; If near, will cause the problem of discharge apart from inner shield 6.

Claims (1)

1. the method for designing of an anode caps of color picture tubes is characterized in that, may further comprise the steps:

The first step is set up colorful visualization tube model coordinate, and some O (0,0,0) is screen outer surface center, and the direction on the long limit of screen is the X axle, and the direction of screen minor face is the Y axle, is the Z axle perpendicular to the direction of shielding outer surface,

In second step, adjustment is positioned at deflection angle β angle to 110 °＜β＜120 ° on the Z axle,

The 3rd step, with the position of anode cap from y-axis shift to the X axle, or in X axle ± 50mm, and be 30mm to 100mm apart from the distance of sealing surface (7).

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