JPS5820454B2 - color ink color ink - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cathode ray tube, and more particularly to a color cathode ray tube.

In color television sets using color cathode ray tubes (hereinafter referred to as C-CRT), due to the recent decline in production costs and the demand for simpler circuits, the deflection device has been simplified by convergence less (hereinafter simply referred to as CL). There is a tendency to

However, although CL is possible in the design of C-CRTs, it is far from becoming common practice due to problems in assembly precision and manufacturing of C-CRTs.

By the way, these manufacturing problems include the assembly of multiple electron guns, variations in the characteristics of the deflection yoke, and the deviation between the exposure center of the fluorescent surface and the center of the electron beam. The problem is that C-CRTs have variations in characteristics such as differences in the degree of deflection of the electron beam due to misalignment with the central axis of the electron gun (hereinafter referred to as R8).

Regarding R8, from a manufacturing perspective, C-CR
This is the deviation between the tube axis of T and the center axis of the electron gun.

Among the above-mentioned variations that cause variations in the characteristics of C-CRTs, assembly of a plurality of electron guns can almost be solved by unifying the parts of the electron guns.

Also, variations in the characteristics of the deflection yoke can be caused by the way it is wound.
(Precision 5tatic Toro
id) The problem was solved to a satisfactory degree by adopting the method.

However, for the R8, there is no other option than to carefully incorporate the electron gun, or to use an oscillation method that indirectly compensates for this by adjusting the fixing position of the deflection yoke to the C-CRT, or an ITC (In
tegral TubeComponent)
Various attempts have been made, but they have been unsatisfactory due to various problems.

Here, the swinging method involves loading the C-CRT into a support device, moving the deflection yoke fitted to the neck of the C-CRT vertically and horizontally, and fixing it with adhesive at the optimal position. This method is carried out when the C-CRT is assembled into a color television set, and requires the intuition and skill of the adjuster, so it has the disadvantage that uniformity of characteristics among color television sets cannot be expected.

In addition, in the ITC method, the C-CRT manufacturer glues and fixes the deflection yoke at the optimum position, or the impedance of the deflection yoke varies among television set manufacturers. It is difficult for the manufacturer to prepare the device, and there is also the disadvantage that the device is dependent on the manufacturer.

Therefore, it is an object of the present invention to not only be able to easily correct manufacturing variations, especially the deviation between the center of deflection and the center of the electron beam, but also to indirectly correct the deviation of the phosphor surface from the center of exposure. The object of the present invention is to provide a C-CRT that can use a deflection yoke unique to color television manufacturers.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a C-CRTI according to the present invention, and 2 is a valve forming an airtight container, which is composed of a neck part 3, a cone part 4, and a face plate part 5. Inside the neck part 3, there is a so-called in-line arrangement. Three electron guns 6L 62
, 63 are arranged.

The three electron beams emitted from the electron gun 6 are deflected, for example, electromagnetically by the cone section 4 and pass through a through hole provided in the shadow mask 7, after which they are behind the shadow mask I and inside the face plate section 6. The fluorescent surface 8 coated on the surface is shocked to produce red, green, and other colors.

Emit blue light appropriately.

Further, in the C-CRT according to the present invention, an adjustment member 9 is fitted and fixed to the neck portion 3.

A deflection yoke 10 is fitted into the adjustment member 9, and the inside of the electron gun is arranged in-line with the center axis of the deflection yoke 10.

The central axis of the electron gun 62 is made to coincide with the central axis of the electron gun 62 at the center.

That is, this adjustment member 9 has a through hole 15 as shown in the front view in FIG. 2a and in the sectional view in FIG.
For example, it is made of plastic and has a cylindrical shape.

The central axis 02 of the through hole 15 is offset from the central axis 01 of the cylinder.

In other words, the center axis of the inner diameter and the center axis of the outer diameter are shifted, but this shift is equal to the shift between the center axis of the deflection yoke 10 and the center axis of the central electron gun 62, and the position of the deflection yoke 10 is adjusted. The R8 mentioned above is moved relatively from the neck part 3.
It is designed to cancel out the

That is, this will be explained using FIG. 3, which is a sectional view of the neck portion 3.

In FIG. 3, the opposite side of the drawing is the face plate side.

By the way, if the central axis 03 of the neck part 3 of the manufactured C-CRT and the central axis 04 of the central electron gun 62 are misaligned as shown in the figure, even if the deflection yoke is fitted directly to the neck part 3, the deflection will not occur. The central axis of the yoke 10 and the central axis 04 of the central electron gun 62 cannot be made to coincide.

This is because the central axis of the deflection yoke 10 and the central axis 03 of the neck portion coincide.

Therefore, the adjustment member 9 is fitted into the neck portion 3, in which the outer diameter center axis 01 and the inner diameter center axis 02 are shifted by an amount equal to the distance between the center axes 03 and 04.

Then, move the adjusting member 9 around the neck portion 3.
The adjustment member 9 is rotated about the center axis 02 of the inner diameter so that the center axis 0 of the outer diameter of the adjusting member 9 and the center axis 04 of the central electron gun 62 are aligned.

When the deflection yoke is fitted into the adjustment portion 9 positioned in this manner, the center axis of the deflection yoke and the center axis 04 of the central electron gun 62 can be aligned.

Hereinafter, means for fixing such an adjustment member 9 to the neck portion 4 will be explained.

First, a standard deflection yoke is fitted onto the neck portion 4 of the manufactured C-CRT, and then a predetermined pattern of the C-CRT is projected.

By measuring the deviation of this projected predetermined pattern, the deviation m between the central axis of the deflection yoke and the central electron gun can be determined.
lMeasure.

By the way, in the case of a 14-inch 90-degree deflection C-CRT, the amount of change in the predetermined pattern (the amount of change in blue or red with respect to green) with respect to the amount of deviation is 0.5 on the inside or outside with respect to 10 mrn in the horizontal axis direction. ~1.5mm, vertical axis direction 1
．． 0mm, 0.5 to 15m in the vertical direction around the left and right
m, and it has been found through actual measurements that it is 0.2 to 1.0 mm in the left and right direction in the upper and lower peripheries.

Further, the standard yoke can be said to be an average deflection yoke that has the same characteristics as a deflection yoke that is manufactured particularly frequently, although there is some variation in characteristics among manufactured deflection yokes.

In other words, if the distribution of the characteristics and number of manufactured deflection yokes is shown on a graph, it can be said that it forms a normal distribution, or it is the deflection yoke that has the characteristics with the largest number on this graph.

After removing the standard deflection yoke, the adjusting member 9 whose distance between the center 01 of the outer diameter and the center 02 of the inner diameter of the adjusting member 9 is equal to the deviation measured above is fitted into the neck portion 3.

Which standard deflection coil is first fitted to this adjustment member 9, and the adjustment member 9 is rotated according to a predetermined pattern so that the adjustment member 9 is optimized so that the center axis of the deflection yoke and the center axis of the central electron gun coincide. Fix it in place with resin, etc.

After that, the standard deflection yoke is removed and the C-
CRT is completed.

In the embodiment of the present invention, the adjustment member has been described as having a cylindrical shape with a through hole that is offset from the axis of the cylinder, but the adjustment member is not limited to this, and if a slight deterioration in workability is tolerated, a cylindrical adjustment member may be used. It is also possible to attach a thin plate member having a vertically divided cylindrical shape with a desired thickness to the outer surface of the neck portion corresponding to the thick portion of the member.

In addition, if the amount of axis misalignment is small, it is possible to apply one or several layers of adhesive tape to the outer surface of the neck part in a layered manner to obtain the desired thickness, or apply paint, adhesive, etc. to the outer surface of the neck part to obtain the desired thickness. It was confirmed that this method can also be carried out using a curable resin that hardens to a certain temperature.

By using the C-CRT according to the present invention, color television set manufacturers can simply fit and fix the deflection yoke to the adjustment member fixed at the optimum position of the deflection yoke, and this will cause problems due to manufacturing variations in the C-CRT. R8, which had become , can be indirectly corrected.

Moreover, since the optimum position of the deflection yoke is determined as described above, there is an advantage that the set manufacturer's own deflection yoke can be used.

Therefore, according to the present invention, the deviation between the center axis of the deflection yoke and the center axis of the central electron gun is offset by moving the position of the deflection yoke using an adjusting member fixed to the neck part.
Not only can manufacturing variations in CRTs be reduced, but when a C-CRT is incorporated into a color television set, the set manufacturer's unique deflection yoke can
- It can be easily installed by simply fitting it into the adjustment member fixed to the CRT.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a color cathode ray tube according to the present invention, and FIG. 2a is a front view of an adjusting member.
FIG. 3 is a sectional view taken along a line, and is a sectional view of the neck portion for explaining the function of the adjusting member. 1...Color cathode ray tube, λ...Pulp, 3...Neck part, 6...Electron gun, 7...Shadow screen, 8
... Fluorescent surface, 9 ... Adjustment member, 15 ... Through hole.

Claims (1)

[Claims] 1. An electron gun installed inside the neck of a bulb forming an airtight container, a deflection yoke attached to the outside of the neck for scanning the electron beam emitted from the electron gun over the entire screen, and the bulb. In a color cathode ray tube device equipped with a fluorescent surface formed on the inner surface of the face plate and a shadow mask installed close to the fluorescent surface, the deflection yoke is arranged so that the deflection center and the central axis of the electron gun coincide with each other. and a neck portion. 2. The color cathode ray tube device according to claim 1, wherein the adjusting member is a cylinder having a through hole, and the central axes of the inner diameter and outer diameter of the cylinder are offset from each other. 3. Claim 1, characterized in that the adjustment member is a thin plate-like member or tape attached to the outside of the neck.
The color cathode ray tube device described in . 4. The color cathode ray tube device according to claim 1, wherein the adjusting member is a resin that is applied to the outside of the neck and hardened to a desired thickness.