JP2002110062A - Color selection mechanism for cathode-ray tube and method for suppressing its vibration - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economically realizable color selection mechanism for a cathode-ray tube, capable of effectively suppressing vibration of an aperture grille in the color selection mechanism for a cathode-ray tube with an upsized screen, and having a novel and simple structure completely different from a conventional type, and to provide a method for suppressing its vibration. SOLUTION: This color selection mechanism for a cathode-ray tube is equipped with the aperture grille 4 having stripe-shaped slits 5 provided in a plurality of rows at prescribed pitches in a metallic sheet and AG tapes 6 formed in a plurality of rows between the slits 5 at prescribed intervals. This mechanism is further provided with projections 7, 7A, 7B, and 7C, between adjoining AG tapes 6 out of the AG tapes 6 on the aperture grille 4 and each capable of colliding/interfering with a mating AG tape 6 opposed thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube widely used for a television receiver and a monitor device of various devices, and more particularly to a color selection mechanism for a cathode ray tube having an aperture grill (AG) and its vibration suppression. It is about the method.

[0002]

2. Description of the Related Art As a color selection mechanism of a color cathode ray tube, there is a color cathode ray tube provided with an aperture grill (AG) in which a number of stripe-shaped slits (openings) are formed in a vertical scanning direction on a thin metal plate by selective etching. FIG. 4 is a perspective view showing the configuration of the conventional color selection mechanism.

This color selection mechanism comprises a pair of opposing AG support members 12 which span an aperture grill 14 as shown in the figure, and a hollow rectangular pipe or the like. A frame-shaped metal frame 11 composed of a pair of elastic members 13 for connecting and holding the support member 12;
1 is formed by stretching an aperture grill 14.

The aperture grill 14 is formed by forming a plurality of stripe-shaped slits (openings) 15 for electron beam selection in a metal thin plate at a predetermined pitch in one direction.
A plurality of rows of AG tapes 16 are formed side by side at predetermined intervals between them.
The AG tape 16 is stretched between the support members 12 by applying a predetermined tension to the both ends of the AG tape 16 and fixing them by welding, so that the AG tape 16 can be prevented from swinging.

In the color selection mechanism for a color cathode ray tube constructed as described above, both ends of the AG tape 16 of the aperture grill 14 are fixed to the AG support member 12, and constitute a string pulled by a certain tension. That is, when vibration is transmitted from the outside to the color selection mechanism provided in the cathode ray tube, the vibration is also transmitted to the aperture grill 14 via the metal frame 11, and the AG tape 16 and the aperture grill 14 generate vibration. Will be.

The vibration includes a case where the AG tape 16 vibrates one by one and a case where the aperture grill 14 vibrates in a plane. When the AG tape 16 or the aperture grill 14 vibrates as described above, the landing of the electron beam on the phosphor screen is disturbed, causing uneven brightness and color shift, etc. Causes deterioration in image quality.

Therefore, as a measure for preventing vibration of the aperture grille 14 in the color selection mechanism, a damper spring 17 is provided on the metal frame 11, and is perpendicular to the AG tape 16 between the damper springs 17 so as to be in contact with the surface of the aperture grille 14. A metal wire 18 called a damper wire is stretched in the direction, and the force of the metal wire 18 in the direction of the aperture grill surface due to the tension of the metal wire 18 causes the AG to move.
A method of suppressing string vibration of the tape 16 and surface vibration of the aperture grill 14 is employed.

[0008] However, in recent years, as the cathode ray tube has a large screen, the conventional method of stretching the thin metal wire 18 called a damper wire has not been able to sufficiently cope with the problem. That is, as the screen size of the cathode ray tube increases, the length of the AG tape 16 constituting the aperture grille inevitably increases accordingly.
The vibration of the AG tape 16 and the aperture grille 14 cannot be sufficiently suppressed only by stretching the thin metal wires 18.

On the other hand, the thin metal wire 18 is connected to the AG tape 1
6 may be considered as one of the solutions. However, increasing the number of the fine metal wires 18 may cause a new problem of shadow caused by the fine metal wires 18. This was not always an effective solution because it would increase the number of parts and increase the cost in proportion.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to address the above problems, and a first object of the present invention is to reduce the vibration of an aperture grill in a color selection mechanism of a cathode ray tube having a large screen. Can be effectively suppressed,
It is an object of the present invention to provide a color selecting mechanism for a cathode ray tube having a novel configuration completely different from that of the conventional method and a method of suppressing the vibration thereof. Another object of the present invention is to provide a color selection mechanism for a cathode-ray tube having a configuration that can easily and economically realize vibration suppression of an aperture grill without adding a new component for vibration suppression, and a vibration suppression method thereof. Is to provide.

[0011]

In order to solve the above-mentioned problems, a color selecting mechanism for a cathode ray tube according to the present invention is provided with a plurality of rows of striped slits at a predetermined pitch in a thin metal plate.
In a color selection mechanism for a cathode ray tube provided with an aperture grill formed by forming a plurality of rows of AG tapes at predetermined intervals between the slits, the cathode grill has a plurality of AG tapes. A projection capable of colliding with and interfering with the AG tape is provided.

As described above, by providing a projection that can collide with and interfere with an opposing partner AG tape between adjacent AG tapes of the respective AG tapes constituting the aperture grill as described above, when the AG tape vibrates, The protrusion collides with and interferes with the opposing partner AG tape, and the vibration can be attenuated and suppressed by the mutual interference and contact friction. Accordingly, the vibration of the AG tape and the aperture grill can be effectively suppressed regardless of the large screen of the cathode ray tube.

[0013] In the color selection mechanism for a cathode ray tube according to the present invention, in the above color selection mechanism for the cathode ray tube, a plurality of the protrusions are provided at predetermined intervals in a length direction of each of the AG tapes. It is a feature.

By providing a plurality of protrusions at predetermined intervals in the length direction of the AG tape, even when the cathode ray tube has a large screen, the protrusions are provided at optimum positions corresponding to the length direction of the AG tape. AG by mutual interference and contact friction
Vibration of the tape and the aperture grill can be suppressed.

Further, in the color selection mechanism for a cathode ray tube according to the present invention, in the above color selection mechanism, the projection is provided so as to protrude in a direction perpendicular to the length direction of each of the AG tapes. It is characterized by the following.

By providing the projections so as to project in the direction perpendicular to the length direction of each AG tape, when the AG tape vibrates, only the projections steadily collide with and interfere with the opposing partner AG tape. , The mutual interference and contact friction
The vibration of the G tape and the aperture grill can be attenuated.

Further, in the color selection mechanism for a cathode ray tube according to the present invention, in the above-described color selection mechanism for a cathode ray tube, the projections are opposed to each other between the adjacent AG tapes so that the projections collide and interfere with each other. It is characterized by having been provided.

By providing the projections between the adjacent AG tapes so that the projections face each other so as to collide with and interfere with each other, the projections collide with each other and interfere with each other. Vibration can be suppressed.

Further, in the color selection mechanism for a cathode ray tube according to the present invention, in the above-described color selection mechanism for a cathode ray tube, the projection is provided on one of the adjacent AG tapes, and the projection is provided on the other AG tape adjacent to the other AG tape. The tape is provided so as to directly collide with and interfere with the tape.

The projection is provided on one of the adjacent AG tapes, and the projection is provided so as to collide with and interfere with the adjacent other AG tape. Colliding with each other, and the mutual interference and contact friction can suppress the vibration of the AG tape and the aperture grill.

Further, according to the method of suppressing vibration of a color selection mechanism of a cathode ray tube according to the present invention, a plurality of rows of stripe-shaped slits are provided at a predetermined pitch in a thin metal plate, and a plurality of rows of AG tapes are formed at predetermined intervals between the slits. In a color selection mechanism for a cathode ray tube having an aperture grille, the adjacent AG tapes of the respective AG tapes of the aperture grill collide with each other and interfere with each other. The vibration of the aperture grill is attenuated.

Since the adjacent AG tapes of the AG tapes constituting the aperture grill collide and interfere with each other, the vibration of the AG tape and the aperture grille can be attenuated by the mutual interference and contact friction. Vibrations of the AG tape and the aperture grill can be effectively suppressed without adding a component for suppressing vibration.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing a configuration of a color selection mechanism of a cathode ray tube according to an embodiment of the present invention, FIG. 2 is a partially enlarged plan view of the aperture grill, and FIG.
(C) is a partially enlarged plan view of an aperture grill according to another embodiment.

In the drawing, reference numeral 1 denotes a metal frame constituting a color selection mechanism of a color cathode ray tube. The metal frame 1 has a pair of opposed AG support members 2 having an L-shaped cross section and a hollow frame. A pair of AG
The AG support member 2 is welded at both ends to the support member 2.
Are formed in a rectangular frame shape by a pair of elastic members 3 connected and held in parallel at predetermined intervals.

A pair of A constituting the metal frame 1
An aperture grill 4 is stretched between the G support members 2.
The aperture grill 4 is formed by forming a plurality of rows of stripe-shaped slits (openings) 5 for electron beam selection in a single direction at a predetermined pitch in a thin metal plate such as a steel plate. It has a configuration in which tapes 6 are formed side by side.

The aperture grill 4 presses a pair of opposing AG support members 2 of the metal frame 1 in a direction to reduce the distance therebetween, and in this state, the aperture grill 4 is held between the front end surfaces of the AG support members 2. By fixing by welding, the aperture grill 4 is stretched between the AG support members 2 by applying a predetermined tension while suppressing the generation of irregularities called wrinkles on the surface of the aperture grill 4.

On the other hand, as shown in FIG. 2, the AG tape 6 of the aperture grill 4
A plurality of protrusions 7 are provided between the G tapes 6 so as to be able to collide with and interfere with the protrusions 7 provided on the mating AG tape 6 facing each other. In the present embodiment, a plurality of projections 7 are provided at predetermined intervals in the length direction of each AG tape 6, and each projection 7 collides with an adjacent projection 7,
The aperture grille 4 has a shape capable of interfering with each other and is provided in a staggered arrangement when viewed as a whole.

Thus, according to the above-described embodiment, the AG constituting the aperture grill 4 in the color selection mechanism is provided.
Since the projections 7 that can collide with and interfere with each other are provided between the adjacent AG tapes 6 of the tape 6, the projections 7
When the tape 6 vibrates, it collides with and interferes with the protrusions 7 of the adjacent AG tape 6, the mutual interference and the contact friction suppress the vibration and accelerate the attenuation.

That is, when an external vibration is transmitted to the aperture grill 4, the AG tape 6 vibrates. This vibration is a combination of in-plane vibration and out-of-plane vibration. When the AG tape 6 swings in the in-plane direction, the projections 7 provided at arbitrary positions of the AG tape 6 collide with each other. Interfere with each other, and suppress the run-out due to mutual interference and contact friction. At the same time, the out-of-plane deflection can be suppressed by the mutual interference.

As a result, even when the length of the AG tape 6 constituting the aperture grille 4 in the color selection mechanism becomes longer with the increase in the screen size of the cathode ray tube, the AG tape 6 and the aperture grille 4 can be effectively removed. Can be suppressed, so that deterioration of the image quality of the cathode ray tube due to so-called AG fluctuation can be prevented, and high-quality image quality can be obtained.

Further, since the projections 7 are formed on the AG tape 6 respectively, it is not necessary to additionally provide a new part for suppressing the vibration of the AG tape 6 and the aperture grill 4, so that the aperture grill is not required. Vibration suppression can be realized economically with a simple configuration.
Further, since each AG tape 6 forms a completely separated string, surface vibration does not become remarkable unlike a slot mask in which the AG tape is bridged by a bridge, and the string vibration of each AG tape 6 is suppressed. In addition, surface vibration can be suppressed thereby.

Particularly, in the case where the AG tape is bridged by a bridge, the bridge may be broken when tension is applied. However, the AG tapes 6 are completely separated, and the AG tapes 6 are connected to each other. With such a configuration, it is possible to apply tension in the same manner as a normal aperture grill and stretch it, and it is possible to reduce wrinkles as compared with a tape with a bridge.

In the above embodiment, the AG tape 6
A plurality of rectangular projections 7 project in a direction perpendicular to the length direction of the AG tape 6 along the length direction of the AG tape 6 and are integrally formed on the AG tape 6 so as to face each other.
The shape, the number, the position, etc. are not limited to these, and various embodiments can be considered. In particular, they are appropriately selected and arranged in consideration of the effect of suppressing vibration and the inconspicuousness of the projection on the display screen.

For example, as the shape of the projection 7, FIG.
As shown in (A) to (C), various modified examples such as a triangular projection 7A, a trapezoidal projection 7B, and an arc projection 7C can be considered, and the degree of the vibration suppression effect due to mutual interference and contact friction can be adjusted depending on the form. it can. In addition to the embodiment shown in FIGS. 2 and 3A in which the projections 7 and 7A are provided so as to face each other so that the projections 7 and 7A collide and interfere with each other,
As shown in FIGS. 3B and 3C, the projections 7B and 7C may be provided so as to directly collide with and interfere with the adjacent AG tape 6.

Further, the embodiment of FIG. 2 shows an example in which the projections 7 are arranged in a zigzag pattern at regular intervals.
Since the portion of the G tape 6 where the vibration increases according to its length is determined, if many protrusions are arranged in this portion,
Vibration can be suppressed more effectively.

[0036]

As described above in detail, according to the color selecting mechanism for a cathode ray tube and the vibration suppressing method according to the present invention, a projection is provided between each AG tape constituting the aperture grill, and the projection is adjacent to the AG tape. Collision and interference with the AG tape, and the vibration of the AG tape and the aperture grille can be suppressed by the mutual interference and contact friction.
Even if the AG tape becomes longer due to the enlargement of the screen of the cathode ray tube, a vibration suppression effect can be obtained by the projection provided at an arbitrary position.

Accordingly, the vibration of the aperture grille in the color selection mechanism of the cathode ray tube having a large screen can be effectively suppressed by a novel vibration suppression method instead of the damper wire method. Further, since the projection is formed integrally with the AG tape, it is not necessary to add a new component for suppressing vibration of the aperture grille, and it is possible to realize a simple configuration and economically.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a color selection mechanism of a cathode ray tube according to an embodiment of the present invention.

FIG. 2 is a partially enlarged plan view of an aperture grill in the color selection mechanism of the present invention.

FIG. 3 is a partially enlarged plan view of another embodiment of the aperture grill in the color selection mechanism of the present invention.

FIG. 4 is a perspective view showing a configuration of a conventional color selection mechanism for a cathode ray tube.

[Explanation of symbols]

4 ... Aperture grill, 5 ... Slit, 6 ... AG tape, 7,7A, 7B, 7C ... Protrusion

Claims (6)

[Claims] 1. A color selecting mechanism for a cathode ray tube comprising: a plurality of rows of striped slits provided at a predetermined pitch in a thin metal plate; and a plurality of rows of AG tapes formed at predetermined intervals between the slits. A color selection mechanism for a cathode ray tube, wherein a projection capable of colliding with and interfering with an opposing partner AG tape is provided between adjacent AG tapes of the respective AG tapes of the aperture grill. 2. The color selection mechanism for a cathode ray tube according to claim 1, wherein a plurality of said projections are provided at predetermined intervals in a length direction of each of said AG tapes. 3. The color selection mechanism for a cathode ray tube according to claim 1, wherein said projection is provided so as to project in a direction orthogonal to a length direction of each of said AG tapes. 4. The cathode ray tube according to claim 1, wherein the projections are provided between the adjacent AG tapes so that the projections collide and interfere with each other. Color sorting mechanism. 5. The method according to claim 1, wherein the protrusion is provided on one of the adjacent AG tapes, and the protrusion is provided so as to directly collide with and interfere with the other adjacent AG tape. 2. A color selection mechanism for a cathode ray tube according to claim 1. 6. A color selecting mechanism for a cathode ray tube having an aperture grill formed by providing a plurality of rows of striped slits at a predetermined pitch in a thin metal plate and forming a plurality of rows of AG tapes at predetermined intervals between the slits. By causing adjacent AG tapes of the respective AG tapes of the aperture grill to collide with each other and interfere with each other,
A vibration suppressing method for a color selection mechanism of a cathode ray tube, wherein the vibration of the AG tape and the aperture grill is attenuated by the mutual interference and the contact friction.