JP3422285B2 - Color sorting mechanism - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to a color sorting machine structure incorporated in a color cathode ray tube.

[0002]

2. Description of the Related Art A color cathode ray tube, for example, a trinitron color cathode ray tube, has an electron gun that emits three electron beams corresponding to R (red), G (green), and B (blue), a stripe fluorescent screen, and color selection. It has a structure including an aperture grill as a mechanism. In this Trinitron color cathode ray tube, the aperture grills are arranged at a predetermined interval in the cathode ray tube so as to face the stripe fluorescent surface provided on the inner surface of the front panel, and the electron beam emitted from the electron gun is directed to the stripe fluorescent surface. It is for guiding.

FIG. 8 is a perspective view showing a structural example of a conventional aperture grill. This aperture grill 100 is
The flat grill 101 is made of a thin mild steel plate, and the steel frame member 102 is joined by welding or the like while the flat grill 101 is applied with a constant tension. Slits 103 and linear electrodes 104 are formed in vertical stripes on the flat grill 101 by an etching method or the like.

The frame member 102 is joined to a pair of first frames 105A and 105B joined to both sides in the longitudinal direction of the slit 103 of the flat grill 101, and to both sides of the first frames 105A and 105B, and It has a pair of second frames 106A and 106B installed between both frames 105A and 105B.

Further, on the surface of the flat grill 101,
Two damper wires 107 in a direction orthogonal to the slit 103
A and 107B are provided. These damper wires 107
A and 107B are made of, for example, a tungsten wire having a diameter of about 10 to 20 μm, and the second frame 105
Two sets of spring pieces 108A attached to A and 105B,
The linear electrodes 104 of the flat grill 101 are in contact with each other by being stretched with a constant tension by 108B. This suppresses the flat grill 101 from resonating due to the forced vibration due to the external force.

[0006]

However, in the conventional aperture grill having the above structure, the flat grill 10 is used.
The damper lines 107A and 107B are provided substantially at the center of the first line. Since some of the damper lines 107A and 107B are located within the effective screen of the cathode ray tube, the shadows of the damper lines 107A and 107B are reduced. Is visually recognized by the user, which may impair the appearance of the screen.

Here, as the color selection mechanism, the case of the aperture grill in the Trinitron color cathode ray tube has been described as an example, but also in the case of the shadow mask in the color cathode ray tube of the shadow mask system,
Since the problem that the shadow mask resonates due to the forced vibration due to the external force occurs, it is necessary to similarly suppress the vibration of the shadow mask.

[0008] The present invention has been made in view of the above problems, it is an object without using a damper wire, the color sorting machine configured capable of suppressing the vibration <br/> To provide.

[0009]

Color selecting mechanism according to the present invention SUMMARY OF THE INVENTION, the a thin plate-like electrode body made of a large number of slits or holes are formed, a fixing portion which is fixed against this electrode body electrode A non-fixed portion that faces the body at a predetermined interval, and a damper member that is provided in at least a part of the electrode body excluding the slit or hole, and the non-fixed portion of the damper member and the non-fixed portion. Vibration of the electrode assembly due to mutual friction with the location of the electrode assembly facing the location
Is configured to suppress .

In the color selecting mechanism having the above structure, when the thin plate-shaped electrode body resonates due to the forced vibration due to the external force, the damper member provided at least at a part of the electrode body except the slits or holes is not fixed to the non-fixed portion. This non-fixed point
Vibration of the electrode body is suppressed by mutual friction with the portion of the electrode body facing the .

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic perspective view showing an overall image of a color cathode ray tube to which the present invention is applied.

In FIG. 1, a panel 12 having a fluorescent surface on its inner surface is attached to the opening of the picture tube bulb 11, and a cone-shaped deflection yoke 13 is attached to the neck of the picture tube bulb 11. An electron gun 14 is installed at the rear end of the picture tube bulb 11. Further, in the case of the Trinitron color cathode ray tube, an aperture grill (not shown) as a color selection mechanism is arranged close to the inside of the panel 12 in front of the fluorescent screen. The present invention is characterized by the structure of this aperture grill.

FIG. 2 is a perspective view showing a basic configuration example of the aperture grill. In FIG. 2, an aperture grill 20 includes a flat grill (electrode body) 21 made of a thin mild steel plate, and a steel frame member 22 joined by welding or the like in a state where the flat grill 21 is applied with a constant tension. It is configured to have. The slit 2 is formed on the flat grill 21 by an etching method or the like.
3 and the linear electrode 24 are formed in vertical stripes.

The frame member 22 is the flat grill 2
A pair of first frames 25A and 25B joined to both sides of the slit 23 in the longitudinal direction, and a pair of first frames 25A and 25B joined to both sides of the first frames 25A and 25B, respectively, and installed between both frames 25A and 25B. A pair of second
It has frames 26A and 26B.

FIG. 3 is an enlarged view of essential parts showing a first embodiment of the present invention applied to an aperture grill. 4 is a sectional view taken along the line AA of FIG. As shown in FIGS. 3 and 4, the linear electrode 24 of the aperture grille 20.
Each of them is provided with one damper member 30 for suppressing the vibration of the aperture grille 20, that is, the vibration of the linear electrode 24 caused by the forced vibration due to the external force.

The damper member 30 is formed in a thin plate shape or a linear shape extending in the longitudinal direction of the linear electrode 24,
An external force is applied to the aperture grille 20, and the aperture grille 2 vibrates by the forced vibration due to the external force.
It has a so-called dynamic vibration absorbing function of absorbing 0 vibration. The shape and dimensions (dimensions in the longitudinal direction, the width direction, and the thickness direction) of the damper member 30 are the same as those of the damper member 3.
It is formed so that the vibration of the aperture grille 20 is best absorbed by the dynamic vibration absorbing function of zero.

Further, the damper member 30 does not protrude from the linear electrode 24 in the width direction of the linear electrode 24.
For example, it is fixed to the linear electrode 24 at one end (shown by hatching in the figure). This is to prevent the path of the electron beam emitted from the electron gun and guided to the phosphor screen by the aperture grill 20 from being blocked by the damper member 30 and causing a shadow on the screen of the cathode ray tube.

In the damper member 30, the portions other than the fixed portions 31 fixed to the linear electrodes 24 (that is, the non-fixed portions) are, as is apparent from FIG. It is provided after. Further, the fixed portion 31 and the non-fixed portion 32 are formed to have substantially the same wide width. An intermediate portion connecting the fixed portion 31 and the non-fixed portion 32 has a width narrower than that of the fixed portion 31 and the non-fixed portion 32 and extends along the longitudinal direction of the linear electrode 24.

The predetermined distance L between the linear electrode 24 and the damper member 30 is determined by the vibration of the aperture grill 20 between the non-fixed portion 32 of the damper member 30 and the portion of the linear electrode 24 facing the non-fixed portion 32. Are in contact with each other and friction is generated between them. this is,
By converting the vibration of the aperture grille 20, that is, the vibration of the linear electrode 24 into energy loss due to mutual friction between the non-fixed portion 32 of the damper member 30 and the portion of the linear electrode 24 facing the non-fixed portion 32. This is to suppress it.

Here, if the predetermined distance L is 0, that is, if the non-fixed portion 32 of the damper member 30 and the portion of the linear electrode 24 facing the non-fixed portion 32 are constantly in contact with each other,
Energy loss due to mutual friction between the two is maximized, which is preferable.

The damper member 30 is made of a conductive material and is configured to maintain the same potential as the linear electrode 24.
This is so that the path of the electron beam emitted from the electron gun and guided to the phosphor screen by the aperture grill 20 is not affected by the potential of the damper member 30.

When fixing the damper member 30 to the linear electrode 24 of the aperture grille 20, it is preferable to form the damper member 30 integrally with the linear electrode 24 by plating. However, the present invention is not limited to this, and the damper member 30 may be provided separately from the linear electrode 24, and the fixing portion 31 of the damper member 30 may be fixed to the linear electrode 24 by laser welding or the like. Alternatively, the damper member 30 may be fixed to the linear electrode 24 with a conductive adhesive.

Next, the function and effect of the damper member 30 in the aperture grille 20 according to the first embodiment having the above structure will be described.

In FIGS. 3 and 4, the aperture grill 2 is shown.
When the vibration due to the external force is applied to 0, the vibration is suppressed by the dynamic vibration absorbing function of the damper member 20, and the vibration of the aperture grille 20 is not fixed to the damper member 30.
This is suppressed by energy loss due to mutual friction between 2 and the portion of the linear electrode 24 facing the non-fixed portion 32. Therefore, the resonance of the aperture grille 20 is effectively suppressed.

Further, since the damper member 30 is fixed to the linear electrode 24 so as not to protrude from the linear electrode 24 in the width direction thereof, the damper member 30 is emitted from the electron gun and guided to the fluorescent screen by the aperture grille 20. Since the path of the emitted electron beam is not shaded by being blocked by the damper member 30, the vibration of the aperture grille 20 can be suppressed without impairing the aesthetic appearance of the screen.

In the above embodiment, one damper member 30 is provided for each linear electrode 24. However, as shown in FIG. You may make it arrange | position a some damper member 30A along. In the case of this modified example, each fixed part 31, non-fixed part 32 of the damper member 30A and an intermediate part connecting them are formed to have substantially the same width, and other configurations are the same as those of the above-described embodiment. It is similar to the case of.

Also in the case of this modified example, basically, the same effect and advantage as in the case of the above-described embodiment can be obtained, and the vibration of the aperture grille 20 can be suppressed. Further, since a plurality of damper members 30A are provided for one linear electrode 24, vibration is more likely to occur than in the case of the above embodiment in which one damper member 30 is provided for one linear electrode 24. The effect of suppression is great.

FIG. 6 shows still another modification. In the case of this other modified example, it is the same as the case of the above-described embodiment in that one damper member 30B is provided for each linear electrode 24, but the difference in the configuration is the damper. The point is that the member 30B is formed longer than the damper member 30, and is fixed to the linear electrode 24 at both ends in the longitudinal direction.

Also in the case of other modified examples, the damper member 3
The fixed portions 31, 31 at both ends of 0B and the intermediate portion (non-fixed portion) 32 connecting them are formed to have substantially the same width, and the other configurations are the same as those in the above-described embodiment. Therefore, the same effect as that of the above-described embodiment can be obtained, and the vibration of the aperture grille 20 can be suppressed.

Further, since the contact area of the damper member 30B with respect to the linear electrode 24 is larger than that of the damper member 30, the damper member 30 is accompanied by the vibration of the linear electrode 24.
When B vibrates, the energy loss due to the mutual friction generated between the damper member 39B and the linear electrode 24 is large, so that each vibration of the linear electrode 24 can be suppressed more reliably, and the suppressing effect thereof. Is extremely large.

In the above embodiment and its modification, the linear electrodes 24 of the damper members 30, 30A and 30B are used.
The arrangement position in the longitudinal direction of the damper member 3
It may be set so that the vibration of the aperture grille 20 is best absorbed by the dynamic vibration absorbing function of 0, 30A, 30B.

The damper members 30, 30A, 30B may be provided on all of the linear electrodes 24, or may be provided on only some of the linear electrodes 24. Further, the damper members 30, 30A, 30B are connected to the linear electrode 24.
May be provided on either the surface on the side where the electron beam enters (electron gun side) or the surface on the side where the electron beam exits (fluorescent surface side).

Furthermore, in the above-described embodiment, the case where the invention is applied to the aperture grille 20 is described as an example, but the present invention is a slot-shaped shadow mask formed by regularly forming a large number of square elongated holes, The present invention can be similarly applied to a dot-shaped shadow mask formed by regularly forming a large number of round holes. That is, by providing the damper member 30 in at least a part of the shadow mask except for the oblong holes or the round holes, the same effect as that of the above-described embodiment can be obtained, and thus the vibration of the shadow mask can be suppressed. it can.

By the way, in the conventional color cathode ray tube image receiver, since the screen has a spherical structure, the shadow mask has the same shape and is formed by pressing a thin plate. In the case of this three-dimensional spherical structure, the vibration of the shadow mask itself did not pose a problem.

On the other hand, in recent years, the flattening of the screen has been promoted, and since it is difficult to design the shadow mask with a three-dimensional spherical structure in this flat screen, the shadow mask is unidirectional or bidirectional. Since then, a tension mask type shadow mask that gives a constant tension has begun to be introduced. However, 1 for shadow masks
When tension is applied in one direction or in two directions, the resonance phenomenon of the thin plate mask itself becomes a problem.

The present invention is also applicable to such a tension mask type shadow mask. Hereinafter, this application example will be described. FIG. 7 is a configuration diagram showing a second embodiment of the present invention applied to a shadow mask,
(A) is a front view of the main part as seen from the phosphor screen side, (B) is BB
FIG. In addition, here, the case where the present invention is applied to a slot-shaped shadow mask will be described as an example.

In FIGS. 7A and 7B, the shadow mask 40 according to the present embodiment has a first mask (electrode body) 41 that functions as an original color selection mask, and the first mask 41. Are placed close to each other with a predetermined distance L,
The double mask structure has a second mask 42 that functions as a damper member that suppresses vibration of the first mask 41 caused by forced vibration due to an external force.

The predetermined distance L between the first mask 41 and the second mask 42 is such that when the first mask 41 or the second mask 42 vibrates, they come into contact with each other and friction occurs between them. The dimensions are set so that they will occur. This is because vibration of the first mask 41 or the second mask 42 is suppressed by converting it into energy loss due to mutual friction between the two.

That is, the shadow mask 40 according to this embodiment has a structure in which the mask itself has a damping characteristic by the double mask structure. Here, if the predetermined interval L is 0, that is, if the first mask 41 and the second mask 42 are in constant contact with each other, the energy loss due to the mutual friction between them becomes maximum, and the damping characteristics are maximized. It is preferable because it can be exhibited.

The first mask 41 is a slot (square hole).
43 is composed of regularly formed thin steel plates. In other words, the first mask 41 has a plurality of vertical stripes 44, 44, ...
A plurality of horizontal stripes 45, 45, ... Which connect adjacent vertical stripes 44, 44 in different steps in the horizontal direction, and an opening area surrounded by the left and right vertical stripes 44, 44 and the upper and lower horizontal stripes 45, 45 is formed. Slot 4
It is 3.

On the other hand, the second mask 42 is made of a steel thin plate in which slots 46 are regularly formed corresponding to the slots 43 of the first mask 41. In other words, the second mask 42 includes a plurality of vertical stripes 47, 47 formed in parallel with each other, and a plurality of horizontal stripes 48 connecting adjacent vertical stripes 47, 47 in a stepwise manner in the horizontal direction. 48, ... and left and right vertical stripes 47, 47 and upper and lower horizontal stripes 4
An opening region surrounded by 8, 48 is a slot 46.

Here, for example, the first mask 41 is located on the electron gun side, and the second mask 42 is located on the phosphor screen side. Therefore, when the width of the vertical stripe 44 of the first mask 41 is w1 and the width of the vertical stripe 47 of the second mask 42 is w2, the second mask 42 is
The width w2 of the vertical stripe 47 is formed such that the width w2 of the vertical stripe 44 of the first mask 41 is w2 <w1.

This is emitted from the electron gun and is shown in FIG.
The path of the electron beam that has passed through the slot 43 of the first mask 41 as indicated by the dotted arrow in FIG.
This is so that it does not block. The plurality of horizontal stripes 48, 48, ... Of the second mask 42 are provided so as to face the plurality of horizontal stripes 45, 45 ,.

Assuming that the thickness of the first mask 41 is t1 and the thickness of the second mask 42 is t2, the thickness of the second mask 42 is as shown in FIG. 7B. T2
Are formed to have a relationship of t2> t1 with respect to the thickness t1 of the first mask 41. In this way, the first and second masks 41 and 42 have vertical stripes 44 and 4 respectively.
7 have different widths w1 and w2, thicknesses t1 and t2, and the like, and have different natural resonance frequencies.

Next, the function and effect of the second mask 42 in the shadow mask 40 according to the second embodiment having the above structure will be described.

When an external force is applied to the shadow mask 40, the external force acts as an original color selection mask.
Mask 41 vibrates at its natural resonance frequency. At this time, since the natural resonance frequency of the second mask 42 is different from the natural resonance frequency of the first mask 41, the second mask 42
Does not vibrate. Therefore, friction occurs between the first mask 41 and the second mask 42, and the vibration of the first mask 41 is suppressed by the energy loss due to this mutual friction.

Even if the second mask 42 vibrates due to an external force, the natural resonance frequency of the first mask 41 is different from the natural resonance frequency of the second mask 42. The first mask 41 does not vibrate,
Since friction is generated between the first mask 41 and the second mask 42, the vibration of the second mask 42 is similarly suppressed.

Further, the second mask 42 is formed such that the width w2 of the vertical stripes 47, 47, ... Is narrower than the width w1 of the vertical stripes 44, 44 ,. Therefore, the path of the electron beam emitted from the electron gun and guided to the phosphor screen by the slot 43 of the first mask 41 is defined by the vertical stripes 4 of the second mask 42.
Since no shadow is generated due to being blocked by 7, 47, ..., Vibration of the tension mask type shadow mask 40 can be suppressed without impairing the aesthetics of the screen.

In the above embodiment, the second mask 4 is used.
2 has been described on the assumption that it is provided on the entire surface of the first mask 41, but it is not always necessary to provide it on the entire surface.
It is also possible to partially provide the region of the shadow mask 40 where vibration can be effectively suppressed. Further, although the second mask 42 is provided on the phosphor screen side of the first mask 41, it may be provided on the electron gun side.

Further, in the above-described embodiment, the case where the invention is applied to the slot-shaped shadow mask has been described as an example, but the invention can be similarly applied to the dot-shaped shadow mask and the like.

[0051]

As described above, according to the present invention,
By providing a damper member on at least a part of the thin plate-shaped electrode body formed by forming a large number of slits or holes, the damper member damps the vibration of the electrode body. Therefore, the vibration of the color selection mechanism can be suppressed without using the damper wire, and since the damper wire does not exist, the shadow of the damper wire is not visually recognized in the effective screen of the cathode ray tube, which impairs the appearance of the screen. Nothing.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an overall image of a color cathode ray tube to which the present invention is applied.

FIG. 2 is a perspective view showing a basic configuration example of an aperture grill.

FIG. 3 is an enlarged view of an essential part showing the first embodiment of the present invention, showing a case where it is applied to an aperture grill.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is an enlarged view of an essential part showing a modified example of the first embodiment.

FIG. 6 is an enlarged view of an essential part showing a further modified example of the first embodiment.

FIG. 7 is an enlarged view of an essential part showing a second embodiment of the present invention, showing a case where it is applied to a slot-shaped shadow mask.

FIG. 8 is a perspective view showing a configuration example of a conventional aperture grill.

[Explanation of symbols]

11 ... Picture tube bulb, 14 ... Electron gun, 20 ... Aperture grille, 21 ... Flat grille, 23 ... Slit, 24
... Linear electrodes, 30, 30A, 30B ... Damper member, 40
... slot mask-shaped shadow mask, 41 ... first mask, 42 ... second mask, 43, 46 ... slot

Claims (4)

(57) [Claims] 1. A a plurality of slits or holes are formed configured thin plate-like electrode body, the electrode body and immobilized attachment places for the electrode body
Non-fixed and a position and a damper member provided on at least a portion except for the slits or holes of the electrode body, the non-fixed portions and non-fixed portion of the damper member facing with a predetermined gap against Vibration of the electrode body due to mutual friction with the facing portion of the electrode body.
A color selection mechanism characterized by suppressing movement . 2. The color selection mechanism according to claim 1, wherein the damper member is formed in a thin plate shape or a linear shape, and one end or both ends in a longitudinal direction thereof are fixed to the electrode body. 3. The damper member is different from the electrode body.
The color selection mechanism according to claim 1 , wherein the color selection mechanism has a natural resonance frequency . 4. The damper member is formed of a conductive material,
The color selection mechanism according to claim 2, wherein the color selection mechanism is configured to hold the same potential as the electrode body.