JP2003346680A - Color selecting electrode, cathode-ray tube and production processes thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color selecting electrode capable of reducing part cost without impairing display performance, a cathode-ray tube and production processes thereof. <P>SOLUTION: The color selecting electrode 10 is equipped with a slit plate 1, in which a plurality of grill wires G have been arranged in parallel with one another. Band portions 13a, 13b having a greater width than the grill wire G are formed on both sides in an arrangement direction of a plurality of the grill wires G in the slit plate 1. A pair of curved portions 12a, 12b are formed with a space from each other on outer sides from the band portions 13a, 13b. Fitting portions 11a, 11b are formed at one curved portion 12a, while fitting portions 11c, 11d are formed at the other curved portion 12b. Damper wires 6a, 6b coming into contact with the grill wires G to suppress vibration are laid between the fitting portions 11a, 11c and between the fitting portions 11b, 11d, respectively. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color selection electrode for guiding an electron beam to each color region of a phosphor screen in a cathode ray tube, a cathode ray tube using the same, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Generally, in a color cathode ray tube, a color selection electrode for guiding an electron beam to each of red, blue and green regions of a phosphor screen is used. A representative example of a color selection electrode is an aperture grill. FIG. 4 is a perspective view showing a conventional aperture grill type color selection electrode 100. As shown in FIG. The color selection electrode 100 has a slit plate 101 in which a plurality of grill lines (linear portions) G are arranged in parallel with each other so that a slit S is formed between adjacent grill lines G.
have. At both ends in the arrangement direction of the grill lines G, band-shaped portions 113a and 113b having a larger width (about 3 mm) than the grill lines G are formed. here,
A direction substantially along the arrangement direction of the grill lines G is defined as an X direction,
The longitudinal direction of the grill line G is defined as a Y direction. A direction orthogonal to both the X direction and the Y direction is defined as a Z direction.

The slit plate 101 is supported at both ends in the Y direction by a pair of frame members 102a and 102b. These frame members 102a and 102b are long members extending in the X direction. A pair of arm members 103a and 103b are provided between the frame members 102a and 102b. The arm member 103a connects the right ends of the frame members 102a and 102b in the drawing to each other, and the arm member 103b is connected to the frame member 1
02a and 102b are connected to each other at the left end in the figure. The color selection electrode 100 composed of the slit plate 101, the frame members 102a and 102b, and the arm members 103a and 103b is attached to the internal magnetic shield 108 and a face panel (not shown) to form a cathode ray tube.

In the color selection electrode 100 configured as described above, when the grill line G of the slit plate 101 vibrates, the influence of the vibration tends to appear on the display screen. Therefore, a pair of damper wires 106a and 106b made of a metal wire are stretched in the X direction so as to abut each grill wire G of the slit plate 101. The damper wire 106a is connected to the arm member 103.
a, a pair of leaf springs 107a attached to 103b,
107c. The damper wire 106b is
It is stretched over a pair of leaf springs 107b and 107d attached to the arm members 103a and 103b.

FIG. 5 is a sectional view showing a structure for supporting the damper wire 106a by the leaf spring 107a. Leaf spring 107
“a” is obtained by bending a long metal member, and a damper wire 106a is fixed to a tip portion thereof. Due to the elastic force of the leaf spring 107a, tension is applied to the damper wire 106a as indicated by an arrow F in the drawing. Support structure of damper wire 106a by leaf spring 107c, and leaf spring 107
The same applies to the support structure of the damper wire 106b by b and 107d.

FIG. 6 is a view showing a process of manufacturing a conventional color selection electrode. First, as shown in FIG. 6 (a), the grill wire G and the band-shaped portions 113a and 113b are formed in a central region of a substantially rectangular metal plate 121, and an outer peripheral portion 123 having a constant width is formed around the grill line G and the band portions 113a and 113b. Form. This metal plate 121
On the frame members 102a and 102b (FIG. 6B),
Weld along desired trajectories 122a, 122b. Note that the frame members 102a and 102b are
a, 103b (FIG. 6 (b)). Next, as shown in FIG. 6B, the outer peripheral portion 123 is removed from the metal plate 121. Thereafter, as shown in FIG. 4, the leaf springs 107a, 1
07b is attached by welding, and leaf springs 107c and 107d are attached to the arm member 103b by welding. Then
Both ends of the damper wire 106a are welded to the leaf springs 107a and 107c, and the damper wire 10 is attached to the leaf springs 107b and 107d.
Weld both ends of 6b.

However, in such a conventional color selection electrode, a leaf spring 107a is attached to the arm members 103a and 103b.
１０７107d has to be attached, and there is a problem that the parts cost is high.

Therefore, in Japanese Patent Application Laid-Open No. 8-335441, as shown in FIG.
13a, tongue pieces 114a, 114b formed integrally with the band-shaped part 113b, and tongue pieces 114c, 114 formed integrally with the band-shaped part 113b.
With d, a configuration for supporting the damper wires 106a and 106b has been proposed. FIG. 8 is a cross-sectional view showing a support structure of the damper wire 106a by the tongue piece 114a. The tongue piece 114a is formed in a V-shape at the edge of the band-like portion 113a, and applies tension to the damper wire 106a as shown by an arrow F in the figure. The support structure of the damper wire 106a by the tongue piece 114c and the support structure of the damper wire 106b by the tongue pieces 114b and 114d are the same.

[0009]

However, in such a configuration, the strip-like portions 113a, 113a of the slit plate 101 are not provided.
113b may be twisted by the force received from the damper wires 106a, 106b. Belt 113
a, 113b, the damper wire 106a,
Not only is it impossible to suppress the vibration of the grill wire G by the 106b, but also there is a problem that the shape of the slit adjacent to the band-shaped portions 113a and 113b is distorted, and the display performance is reduced.

In the above publication, the damper wire 106
a and 106b are strip-shaped portions 113a of the slit plate 101,
Although a configuration in which the damper wires are fixed directly to the surface of the damper wires 106a and 106b has been proposed.
There is a problem that it is difficult to apply an appropriate tension to b.

The above publication also proposes a configuration in which the width of the band portions 113a and 113b at both ends of the slit plate 101 is increased to prevent twisting. However, the width of the band portions 113a and 113b is increased. Has a slit plate 1
01 has to be increased, and there is a problem that the display screen size does not change and only the outer shape of the cathode ray tube increases.

The present invention has been made to solve the above problems, and provides a color selection electrode, a cathode ray tube, and a method for manufacturing the same, which can reduce the cost of parts without impairing the display performance. The purpose is to:

[0013]

According to a first aspect of the present invention, there is provided a color selection electrode in which a plurality of linear portions are arranged in parallel with each other so that a slit is formed between adjacent linear portions. A slit plate in which first and second strip-shaped portions are arranged on both sides in the arrangement direction of the slit portions, a support frame supporting the slit plate, and the plurality of linear portions of the slit plate are brought into contact with each other, and the vibration thereof is reduced. First and second elastically deformable mounting portions, wherein the slit plate is disposed outwardly from the first and second strip portions in the direction of the arrangement, respectively. And the damper wire is stretched over the first and second mounting portions.

According to a second aspect of the present invention, in the color selection electrode, the support frame is provided on one side of the slit plate, and supports both ends in a direction orthogonal to the arrangement direction of the linear portions. The slit plate is provided with first and second bent portions bent toward the support frame at positions outside the first and second band portions in the arrangement direction.

According to a third aspect of the present invention, in the color selection electrode, the first and second bent portions are fixed to the support frame.

According to a fourth aspect of the present invention, in the color selection electrode, a part of each of the first and second bent portions is further bent to a side opposite to the support frame to thereby form the first and second bent portions.
And a second mounting portion.

According to a fifth aspect of the present invention, in the color selection electrode according to the first aspect of the invention, the color selection electrode is provided between the first bent portion and the first band portion and between the second bent portion and the second band portion. An interval wider than the slit is provided.

According to a sixth aspect of the present invention, there is provided a cathode ray tube including the above-described color selection electrode.

According to a seventh aspect of the present invention, there is provided a method for manufacturing a color selection electrode, comprising:
A plurality of linear portions are arranged in parallel with each other so that a slit is formed between adjacent linear portions, and first and second strip portions are arranged on both sides in the arrangement direction of the plurality of linear portions. Preparing a plate-like member, fixing the region including the plurality of linear portions and the first and second band-like portions in the plate-like member to a support frame, and fixing the region fixed to the support frame. Removing, from the plate-like member, a portion located outside the region in a direction perpendicular to the direction of the arrangement, and removing the portion outside the region in the direction of the arrangement from the plate-like member fixed to the support frame. Forming a first and a second bent portion by bending a portion located at
Forming first and second elastically deformable attachment portions at the second and the bent portions, respectively, and the first and second attachment portions.
And a step of abutting the damper wires for contacting the plurality of linear portions of the slit plate to suppress the vibration thereof.

[0020] A method for manufacturing a color selection electrode according to claim 8 is as follows.
In the step of forming the first and second attachment portions, a part of each of the first and second bent portions is bent to a side opposite to the support frame.

According to a ninth aspect of the present invention, there is provided a method of manufacturing a cathode ray tube including the above-described method of manufacturing a color selection electrode.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a perspective view illustrating a configuration of a color selection electrode according to Embodiment 1 of the present invention. The color selection electrode 10 according to the first embodiment has a slit plate 1 in which a plurality of grill lines (linear portions) G are arranged parallel to each other so that a slit S is formed between adjacent grill lines G. are doing. This slit plate 1 is a metal plate,
For example, it is formed by performing selective etching. Here, a direction substantially along the arrangement direction of the grill lines G is defined as an X direction, and a longitudinal direction of the grill lines G is defined as a Y direction. A direction orthogonal to both the X direction and the Y direction is defined as a Z direction.

To support the slit plate 1, on one side of the slit plate 1 (the side opposite to the display screen),
A pair of frame members 2a and 2b are provided. FIG.
Then, one frame member 2b (see FIG. 3B) is hidden behind the slit plate 1. These frame members 2a, 2b
Each of them is a long member that is long and curved substantially in the X direction, and is configured to support both ends of the slit plate 1 in the Y direction. A pair of arm members 3a, 3b is provided between the frame members 2a, 2b. The arm member 3a connects the right ends of the frame members 2a and 2b in the drawing to each other, and the arm member 3b
Connects the left ends in the figures of the frame members 2a and 2b to each other. The frame members 2a and 2b and the arm members 3a and 3b constitute a support frame that supports the slit plate 1.

A color selection electrode 10 is provided at the center of the frame members 2a and 2b in the longitudinal direction and at the center of the arm members 3a and 3b in the longitudinal direction.
Are fixed to a face panel (not shown), and a leaf spring 5 connected to a predetermined portion of the face panel is fixed to each of the mounting pieces 4. On the side of the frame members 2a and 2b opposite to the side of the slit plate 1, an internal magnetic shield 8 having a substantially truncated pyramid shape is attached. A cathode ray tube is constituted by the color selection electrode 10, the internal magnetic shield 8, a face panel (not shown), and the like.

The slit plate 1 has a plurality of grill wires G
On both sides in the direction, a pair of band-shaped portions 13a and 13b wider than each grill line G are formed. The strip portions 13a and 13b shield the periphery of a portion corresponding to the display screen of the color selection electrode 10 so that the electron beam does not leak. The slit plate 1 further has a pair of bent portions 12a and 12b bent toward the support frame, further outside the pair of band-shaped portions 13a and 13b in the X direction.

A slit 14a wider than the slit S (hereinafter, referred to as a wide slit) 14a is formed between the bent portion 12a and the strip portion 13a. Similarly, a slit S is provided between the bent portion 12b and the band-shaped portion 13b.
A wide slit 14b wider than that is formed.
Due to these wide slits 14a and 14b, the bent portion 1
2a and the strip portion 13a are separated from each other,
b and the strip 13b are spaced apart from each other.

In the bent portion 12a, elongated attachment portions 11a and 11b are formed. These mounting parts 1
1a and 11b are relative to the center of the slit plate 1 in the Y direction.
Preferably, they are formed at symmetrical positions. Similar attachment portions 11c and 11d are also formed on the bent portion 12b. The mounting portion 11a of the bent portion 12a and the mounting portion 11c of the bent portion 12b are opposed to each other in the X direction, and a damper wire 6a extends between the mounting portions 11a and 11c. Similarly,
The mounting portion 11b of the bent portion 12a and the mounting portion 11d of the bent portion 12b face each other in the X direction, and a damper wire 6b is stretched between these mounting portions 11b and 11d. Damper wire 6a, 6b
Is for contacting each grill wire G of the slit plate 1 and suppressing its vibration.

FIG. 2 is a sectional view showing a support structure of the damper 6a by the mounting portion 11a. Mounting part 11a
Is integrated with the bent portion 12a at one end in the longitudinal direction, and extends therefrom to the side opposite to the arm 3a side.
The angle between the attachment portion 11a and the bent portion 12a is an acute angle. A damper wire 6a is fixed to a distal end of the mounting portion 11a. The attachment portion 11a is elastically deformable in a direction in which the angle between the attachment portion 11a and the bent portion 12a is widened (outside) and in a narrowed direction (inside). With the mounting portion 11a elastically deformed inward, the damper wire 6
is fixed, the mounting portion 11a attempts to return to the outer position by the elastic force.
Is given. Damper wire 6a by mounting part 11b
And the support structure of the damper wire 6b by the mounting portions 11c and 11d is the same. Mounting part 11a
The tension F applied to the damper wires 6a, 6b can be adjusted by adjusting the shape and the bending angle of 11d to 11d.
The frame members 2a, 2b and the arm members 3a, 3b are members having sufficient rigidity, and do not bend under the influence of the tension of the damper wires 6a, 6b.

Here, the bent portions 12a and 12b are connected to the damper wires 6a and 6b via the mounting portions 11a to 11d.
Receives the reaction force of the pulling force F. However, as described above, the bent portions 12a, 12b and the band-shaped portions 13a, 1
3b are separated from the bent portions 12a,
Even if the bending of the slit 12b occurs, the shape of the slit S is not deformed, so that there is no influence on the display screen. The bent portions 12a, 12b are preferably fixed to the end surfaces of the frame members 2a, 2b or the arm members 3a, 3b, for example, by welding. By doing so, the bent portion 12
This is because the flexures a and 12b can be reliably suppressed.

A notch 18a is formed at the center of the bent portion 12a in the Y direction so as not to interfere with the mounting piece 4 and the leaf spring 5 mounted on the arm member 3a. Although not shown, the bent portion 1
A similar notch is also formed in 2b.

Next, a method for manufacturing the color selection electrode according to the first embodiment will be described with reference to FIG. First, the central region of the substantially rectangular metal plate 21 is selectively etched to form the grid G and the strip portions 13a and 13b. In the metal plate 21, an outer peripheral portion 23 having a constant width is formed around a region where the grid G and the band portions 13a and 13b are formed. This metal plate 21
As shown in FIG. 3A, the frame members 2a and 2b (FIG. 3C)
) And welded to the frame members 2a, 2b along desired trajectories 22a, 22b. The frame members 2a, 2b
Is preliminarily combined with the arm members 3a and 3b.

Next, as shown in FIG. 3B, both ends in the Y direction of the outer peripheral portion 23 are removed from the metal plate 21 welded to the frame members 2a and 2b. Further, FIG.
As shown in (c), both end portions in the X direction of the outer peripheral portion 23 are bent toward the frame members 2a and 2b, thereby forming the bent portions 12a and 12b.

Subsequently, as shown in FIG. 3D, the portion between the two cuts of the bent portion 12b is bent toward the side opposite to the support frame to form the mounting portion 11c. The cut of the bent portion 12b may be formed in advance, or may be formed after the step of welding the metal plate 21 to the frame member 2 (FIG. 3B). Similarly, the attachment portion 11d is formed on the bent portion 12b, and the bent portion 1
Attachment parts 11a and 11b are formed in 2a. Although not shown, in the step of forming the cuts in the bent portions 12a and 12b, the cutouts 18a (FIG. 4) are formed in the respective central portions of the bent portions 12a and 12b.

After that, both ends of the damper wire 6a are fixed to the mounting portions 11a and 11c by welding or the like, and both ends of the damper wire 6b are fixed to the mounting portions 11b and 11d by welding. A cathode ray tube is obtained by assembling the color selection electrode 10 thus obtained to the internal magnetic shield 8, a face panel (not shown) and a funnel.

As described above, according to the color selection electrode according to this embodiment, the bent portions 12a of the slit plate 1
Elastically deformable mounting portions 11a to 11 provided on the base 12b
Since the damper wires 6a and 6b are passed over d.
The vibration of the grill wire G can be suppressed, and it is not necessary to provide a dedicated leaf spring for attaching the damper wires 6a, 6b as a separate member, so that the cost of parts can be reduced. Further, since the bent portions 12a and 12b are formed apart from the band portions 13a and 13b, even if the bent portions 12a and 12b are bent, it is possible to prevent the display image from being affected.

Further, since the bent portions 12a and 12b are bent from both ends of the slit plate 1, it is not necessary to increase the size of the color selection electrode. In addition, since both ends of the slit plate 1 in the Y direction are fixed to the frame members 2a and 2b, the deformation of the slit S is less likely to occur. Also,
By fixing the bent portions 12a, 12b to the frame members 2a, 2b or the arm members 3a, 3b, the bent portions 12a, 12b are fixed.
12b can be prevented from bending.

In the manufacturing process of the color selection electrode 10, after fixing the metal plate 21 to the frame members 2a and 2b, the end of the outer peripheral portion 23 of the metal plate 21 in the Y direction is removed, and the end in the X direction is removed. Bent portions 12a and 12b
Are formed, and the mounting portions 1 are attached to the bent portions 12a and 12b.
Since 1a to 11d are formed, it is possible to obtain the effect of reducing the component cost without deteriorating the display performance while using the general-purpose metal plate 21. Further, by bending each part of the bent portions 12a and 12b,
Since the mounting portions 11a to 11d are formed,
The manufacture of these mounting portions 11a to 11d is simplified.

[0038]

Since the present invention is configured as described above, it has the following effects.

According to the first and sixth aspects of the present invention, since the damper wire is bridged between the first and second mounting portions formed on the slit plate, the vibration of the linear portion of the slit plate is suppressed. can do. Further, since it is not necessary to provide a leaf spring or the like for attaching the damper wire as a separate member, the cost of parts can be reduced. further,
Since the first and second attachment portions are formed to be separated from the band portions at both ends of the slit plate, the deformation of the slit when the first and second attachment portions are bent can be prevented. That is, without deteriorating the display performance,
Parts cost can be reduced.

According to the second aspect of the present invention, in the slit plate, a portion outside the first and second strip-shaped portions is bent toward the support frame, so that the color selection electrode is enlarged. Parts cost can be reduced without using any components.

According to the third aspect of the present invention, since the bent portion of the slit plate is fixed to the support frame, it is possible to more reliably suppress the occurrence of bending at the bent portion.

According to the fourth and eighth aspects of the present invention, in the slit plate, each of the first and second bent portions is further bent so that the first and second bent portions are bent.
, So that the first and second
This facilitates formation of the mounting portion.

According to the fifth aspect of the present invention, the width between the first bent portion and the first band portion and between the second bent portion and the second band portion are smaller than the width of the slit. Is provided, the deformation of the slit when the first and second mounting portions are bent can be more reliably prevented.

According to the seventh and ninth aspects of the invention, after the plate member is fixed to the support frame, the outer peripheral portion in the direction orthogonal to the arrangement direction of the linear portions is removed, and the outer peripheral portion in the arrangement direction is removed. Is bent to form first and second bent portions, and the first and second bent portions are formed with the first and second attachment portions, respectively. Parts cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a color selection electrode according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view showing a configuration for supporting a damper wire according to Embodiment 1 of the present invention.

FIG. 3 is a perspective view illustrating a method for manufacturing a color selection electrode according to Embodiment 1 of the present invention.

FIG. 4 is a perspective view showing an example of the configuration of a conventional color selection electrode.

FIG. 5 is a cross-sectional view showing an example of a configuration for supporting a damper wire in a conventional color selection electrode.

FIG. 6 is a schematic view showing a method of assembling a conventional color selection electrode.

FIG. 7 is a perspective view showing another example of the configuration of a conventional color selection electrode.

FIG. 8 is a cross-sectional view showing another example of a configuration for supporting a damper wire in a conventional color selection electrode.

[Explanation of symbols]

Reference Signs List 1 slit plate, 2a, 2b frame member, 3a, 3b arm member, 4 mounting piece, 5 leaf spring, 6a, 6b damper wire, 8 internal magnetic shield, 10 color selection electrode, 1
1a, 11b, 11c, 11d mounting part, 12a,
12b bent portion, 13a, 13b strip portion, 14
Wide slit, 21 metal plate, 23 outer periphery.

Claims (9)

[Claims] A plurality of linear portions are arranged in parallel with each other such that a slit is formed between adjacent linear portions, and first linear portions are arranged on both sides in the arrangement direction of the plurality of linear portions.
And a slit plate on which a second band-shaped portion is arranged; a support frame supporting the slit plate; and a damper wire that abuts on the plurality of linear portions of the slit plate and suppresses vibration thereof. A slit plate having first and second elastically deformable attachment portions disposed outwardly and spaced apart from the first and second band-shaped portions in the direction of the arrangement, respectively; A color selection electrode, wherein the damper wire is stretched over the mounting portion of the color selection electrode. 2. The support frame is provided on one side of the slit plate, and is configured to support both ends in a direction orthogonal to an arrangement direction of the linear portions. In a position outside the first and second belt-shaped portions in the arrangement direction, first and second bent portions bent toward the support frame side are provided, and the first and second bent portions have: The color selection electrode according to claim 1, wherein the first and second attachment portions are formed respectively. 3. The apparatus according to claim 2, wherein the first and second bent portions are fixed to the support frame.
2. The color selection electrode according to 1. 4. The first and second mounting portions are formed by bending a part of each of the first and second bent portions further toward a side opposite to the support frame side. The color selection electrode according to claim 2 or 3, wherein: 5. An interval wider than the slit between the first bent portion and the first strip portion and between the second bent portion and the second strip portion. The color selection electrode according to claim 2, wherein the color selection electrode is provided. 6. A cathode ray tube provided with the color selection electrode according to claim 1. 7. A plurality of linear portions are arranged in parallel with each other so that a slit is formed between adjacent linear portions, and first and second linear portions are arranged on both sides in the arrangement direction of the plurality of linear portions. A step of preparing a plate-like member on which a band-like portion is arranged; and the plurality of linear portions and the first
And a step of fixing the region including the second band-shaped portion to a support frame, and, from the plate member fixed to the support frame, a portion located outside the region in a direction orthogonal to the direction of the arrangement. Removing, from the plate-shaped member fixed to the support frame, a portion located outside the region in the direction of the arrangement,
Forming a first and a second bent portion by bending the support frame side; and forming first and second elastically deformable mounting portions on the first and the second bent portion, respectively. And a step of bridging the first and second mounting portions with a damper wire that abuts on the plurality of linear portions and suppresses vibration thereof, the method comprising: 8. The step of forming the first and second attachment portions, wherein a part of each of the first and second bent portions is further bent toward a side opposite to the support frame side. The method for producing a color selection electrode according to claim 7. 9. A method for producing a cathode ray tube, comprising producing a color selection electrode by the production method according to claim 7. Description: