JPH11329233A - Manufacture of cathode-ray tube and color-selection electrode holding member for cathode-ray tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color-selection electrode holding member which enables readjustment of the interval between a fluorescent screen and an aperture grill, when the fluorescent screen having irregular stripe intervals is formed. SOLUTION: One end of the spring 14 is fitted with a stud pin on the inside wall of a panel, and the other end is fixed to the color-selection electrodes. The spring 14 holds the color-selection electrodes leaving the prescribed space from the internal surface of the panel, with the long sides of the spring 14 being orthogonal to the tube axis. Here, a fitting hole position adjusting means is provided to the one end of the spring 14. The adjusting means has a washer receiving part having a perforated hole 12b with a diameter larger than a spring hole 12a for fitting with the stud pin, and having a pair of bolt holes 15 sandwiching the hole 12b on the line parallel to the long sides of the spring 14, a washer 18 made of a thin billet member and having of long holes 19 arranged parallel to each other so as to sandwich the spring hole 12a and the perforated hole 12b, and fixing bolts 20 penetrating the oblong holes 19 to fix the washer 18 to the washer receiving part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a cathode ray tube and a member for holding a color selection electrode of a cathode ray tube. The present invention relates to a method for re-forming a phosphor screen by re-exposure after re-adjusting an interval, and a color selection electrode holding member capable of adjusting an interval between the phosphor screen and the color selection electrode.

[0002]

2. Description of the Related Art FIG. 4 is a perspective view showing an outline of a cathode ray tube, FIG. 5 is a perspective view showing an aperture grill held on a panel using a conventional holder, and FIG. 6 is a conventional long side holder. FIG. 7 is a perspective view showing a conventional short-side holder, and FIG. 8 is a perspective view of a model showing a fluorescent screen having stripes with large and small intervals mixed. As shown in FIG. 4, the outer container of the cathode ray tube has a front panel 1 having a fluorescent screen 9 on the inside, a rear funnel 2 having a convex bulge, and a pipe-shaped fixing the electron gun therein. It is constituted by a neck 3. 9 a, 9 b and 9 c show three phosphor stripes arranged at a predetermined interval on the phosphor screen 9 applied to the inner surface of the panel 1.

[0003] As shown in FIG. 5, an aperture grill 4 is arranged in the outer container of the cathode ray tube. The aperture grill 4 includes a stud pin 8 protruding from an inner wall of the panel 1, a long-side holder 5 a welded to the frame H member 6, and a short-side holder welded to the frame V member 7. 5b each spring hole 12a
Are fixed and held on the panel 1 by fitting. The long side holder 5a is composed of a spring 10a and a clip 11 as shown in FIG.
In addition, the short side holder 5b includes a spring 10b and a clip 13 as shown in FIG. The springs 10a and 10b are members for holding the aperture grille 4, and have spring holes 12a at their free ends for fitting with the stud pins 8. The clips 11 and 13 are members to which the springs 10a and 10b are fixed. In addition,
The fixing of the clip and the spring is performed when the aperture grill 4 is incorporated into the panel 1 as described later.

In a cathode ray tube, three electron beams emitted from an electron gun and arranged in a row are arranged such that a left beam is directed to a right through a certain slit 41 of an aperture grille 4 having a large number of narrow slits. The right beam passes to the left, the center beam passes to the center, and certain 3 lines are arranged at a predetermined interval on the phosphor screen 9.
An image is displayed by emitting light upon hitting the phosphor stripes 9a, 9b, 9c of the book.

[0005] Since the relative position between the stripe of the fluorescent screen 9 and the slit 41 of the aperture grill 4 is determined from this, the distance between the fluorescent screen 9 and the aperture grill 4 (hereinafter, referred to as the distance).
Q interval) is determined so that the above relationship is satisfied. The phosphor screen 9 is manufactured by light exposure through a slit 41 of the aperture grille 4 fixed to the panel 1 and using a black matrix (BM) 24, a stripe blue B, a stripe green G, and a stripe red R in this order. For this reason, the aperture grille 4 is fixed at a Q interval corresponding to the designed stripe interval.

[0006] The fixing of the aperture grille 4 is performed in the following general procedure. a. The clip 11 is welded to the frame H member 6. Similarly, the clip 13 is welded to the frame V member 7. Frame H member 6
Is provided with an aperture grill 4. b. The mounting positions (on the x, y, and z coordinates) of the four stud pins 8 projecting from the inner wall of the panel 1 are read by an automatic machine.
c. Based on the position of the stud pins 8, the aperture grille 4 is provided in the panel 1 in accordance with the determined design Q interval value.
(Fixed frame and clips are fixed) and fixed. d. After the springs 10a, 10b are fitted to the stud pins 8 in the state of the above c, the springs 10a, 10
Weld b. Thus, the installation is completed.

After the aperture grill 4 is fixed to the inner surface of the panel 1 as described above, a phosphor screen is manufactured by the exposure technique.

[0008]

In the conventional method for manufacturing a fluorescent screen of a cathode ray tube, the aperture grill 4 is
The spring of the holder and the clip are fixed by welding in a state of being assembled in the panel 1 with the aim of achieving the Q interval of the design value. Is not as designed, a phosphor screen with irregular stripe intervals is formed. That is, as shown in FIG. 8, the grouping portion 23b in which the stripe interval in the trio 9d is small because the Q interval is smaller than the design value, and the grouping portion 23b in the trio 9d when the Q interval is larger than the design value. In this case, a degrouping portion 23a having a large stripe interval is generated, and as a result, a fluorescent screen having irregular stripe intervals is formed. But,
There is a problem that the Q interval cannot be readjusted by the conventional phosphor screen manufacturing method.

Further, even when assembled at the design value Q interval, the stripe interval differs from the design target due to variations in the finish of the inner surface of the panel 1, adjustment of exposure conditions, mismatching of the exposure lens used for exposure, and the like. There is a problem that an irregular fluorescent screen is formed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. If a design target or stripes having regular intervals cannot be obtained, the Q interval is readjusted and re-exposed. It is an object of the present invention to provide a method for remanufacturing a target or a phosphor screen having stripes at regular intervals, and to obtain a color selection electrode holding member capable of adjusting a Q interval.

[0011]

According to a method of manufacturing a cathode ray tube according to the present invention, a stud pin projecting from an inner wall of a panel is fitted to one end of a strip-shaped member made of an elastic material, and
The inner surface of the panel and the color selection electrode, having a fitting hole configured to be adjustable in position and interposing a plurality of holders to which the color selection electrode is fixed at the other end so that a regular stripe interval is obtained. A first step of setting a space between the electrodes and incorporating a color selection electrode into the panel, a second step of forming a fluorescent screen on the inner surface of the panel using the color selection electrode as an exposure mask, and inspecting the completed fluorescent screen. If a regular stripe interval is included, adjust the positions of the fitting holes of at least two holders based on the size of the irregular stripe interval, and re-adjust the interval between the panel inner surface and the color selection electrode. 3rd to set
A fourth step of removing a phosphor screen including irregular stripe intervals and forming a new phosphor screen; a fifth step of repeating the third and fourth steps; and a fluorescence of regular stripe intervals. And fixing the position of the fitting hole when the surface is formed.

A color selection electrode holding member for a cathode ray tube according to the present invention includes a band-shaped member made of an elastic material, and one end of the band-shaped member is fitted to a stud pin projecting from an inner wall of a panel, and the other end thereof. A color selection electrode holding member fixed to the color selection electrode and arranged so that the long side thereof intersects the tube axis and holding the color selection electrode at a predetermined interval with respect to the inner surface of the panel is fitted to the stud pin. The position of the fitting hole is adjustable in the width direction of the band-shaped member.

The fitting hole position adjusting means is provided with a through hole having a diameter larger than a fitting hole with a stud pin provided at one end of the band member, and is provided in the long side direction of the band member with the through hole interposed therebetween. A washer receiving portion having a pair of bolt holes, a fitting hole for a stud pin, and a washer having an elongated hole arranged in parallel with the hole interposed therebetween; and a washer penetrating through the elongated hole of the washer. And a washer fixing bolt fixed to the receiving portion.

A first bent portion formed by bending the washer receiving portion of the band-shaped member into an L shape along the long side of the band-shaped member;
Adjustment for adjusting the relative position between the washer and the washer receiving portion by screwing the end of the washer into the L-shaped bent portion and the first and second bent portions at a fold perpendicular to the long hole. Having a relative position adjusting mechanism provided with a screw.

The adjusting screw is provided so as to be adjustable from the electron gun side.

Further, a guide portion is formed by folding one side edge parallel to the long hole of the washer so as to surround the washer receiving portion, and the guide portion guides relative movement of the washer by the adjusting screw. is there.

Still further, minute unevenness is provided on a surface where the washer and the washer receiving portion are in contact with each other or on both surfaces of the washer and the washer receiving portion.

The washer fixing bolt is made of metal having excellent heat resistance.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a perspective view showing a state in which a spring and a washer are combined in Embodiment 1, FIG. 2 is a perspective view showing a spring in Embodiment 1, and FIG. 3 is a perspective view showing a spring hole position adjusting washer. is there.

In FIG. 2, reference numeral 14 denotes a spring, which corresponds to the conventional springs 10a and 10b.
Reference numeral 12b denotes a through hole which is larger than the pin diameter of the fitting surface of the stud pin 8. That is, the hole is larger in diameter than the spring hole 12a. Reference numeral 15 denotes a bolt hole for fixing a washer.
Are holes for fixing the washer 18 shown in FIG. This washer fixing bolt hole 15 is a pair of holes sandwiching the through hole 12b, and is provided on a line parallel to the long side of the spring 14. The washer fixing bolt hole 15 is a stupid hole in this example, but may be a screw hole. 16a is an adjusting screw 22
As shown in the drawing, a part of the long side of the spring 14 is provided with a fold along the long side in a bent portion 141 which is bent in an L-shape. The spring 1
The portion provided with the through hole 12b, the washer fixing bolt hole 15 and the bent portion 141 at one end of the portion 4 is a portion to which the washer 18 is fixed as shown in FIG. .

The washer 18 is formed in a shape as shown in FIG. Reference numeral 12a denotes a spring hole which is the same as the hole formed in the conventional springs 10a and 10b. 19
Are long holes provided in parallel on both sides of the spring hole 12a. 16b is a screw hole for adjustment, and the end of the washer is
It is provided in a bent portion 181 which is bent in an L-shape as shown in the figure with a fold perpendicular to FIG. 17 is a guide,
The edge orthogonal to the bent portion 181 is
4 is formed so as to be wrapped around the end.

The washer 18, as shown in FIG.
And the fixing bolt 20 into the bolt hole 15 and the nut 2
1 is attached to the spring 14 by tightening. With the configuration as described above, the position of the spring hole 12a can be adjusted in the width direction of the spring 14 by retightening the fixing bolt 20 and the nut 21. Therefore, as shown in FIG. 5, the position of the spring hole 12a can be adjusted in the tube axis direction in a state where the aperture grille 4 is incorporated in the panel 1.
The adjusting screw 22 is passed through the hole 16a and
6b, and an E-ring (not shown) is fitted over the bent portion 141, so that the fixing bolt 20
The washer 18 by rotating the adjusting screw 22.
And the relative position of the spring 14 can be changed.
Therefore, the position of the spring hole 12a can be easily adjusted. Further, since the guide 17 is provided, when the washer 18 is moved by the rotation of the adjusting screw 22, the washer 18 moves along the elongated hole 19 and the guide 17, and can be adjusted and moved without play or shaking. Further, in a state where the aperture grille 4 is taken into the panel 1 (see FIG. 5), the springs 14 and the washers 18 are provided with bending portions so that the bending portions 141 and 181 are arranged on the electron gun side. The adjustment using the screw 22 can be performed from the electron gun side. The side on which the bent portions 141 and 181 are provided depends on the side of the washer receiving portion with respect to the fixed end with the spring 14 mounted as shown in FIG. Short side holder 5 shown in FIG.
In the case of b, the springs and washers shown in FIGS. 2 and 3 may be used. As the long side holder 5a in FIG. 5, a holder provided with bent portions 141 and 181 on the side opposite to that in FIGS. 2 and 3 is used.

The fixing bolts 20 are made of N material in addition to iron material in order to reduce thermal expansion due to heat treatment performed before manufacturing the phosphor screen.
An i-Cr SUS material or an NCF material (super heat-resistant alloy) to which Ti or Al is added is used.

The surface of the washer 18 on the side of the spring 14 and the surface of the spring 14 on the side of the washer 18 are provided with minute irregularities, so that when the washer 18 and the spring 14 are fixed by the fixing bolt 20, The wedge effect of the contact surface unevenness increases the frictional force at the contact surface between the washer and the spring, and improves the fixing pressure. Therefore, it is possible to reduce a change in Q interval with respect to a drop and a vibration in a process until the manufacture of the phosphor screen is completed. Washer 18 and spring 14
Are provided on both surfaces of the spring, the contact surface between the washer 18 and the fixing bolt 20 and the spring 14 and the fixing nut 2
The frictional force at the contact surface with No. 1 also increases. Therefore, the fixing pressure is further improved, and the effect of reducing the change in the Q interval is improved.

Embodiment 2 Next, a process of manufacturing a phosphor screen using the aperture grill holder described in the first embodiment will be described. a. First, the aperture grill 4 is incorporated into the panel 1 with the goal of achieving the Q interval of the design value. At this time, the position of the spring hole 12 a is adjusted so that the Q interval of the design value is obtained between the spring 14 and the washer 18, and the spring 14 and the washer 18 are fixed by the fixing bolt 20 and the nut 21. In this state, using the aperture grill 4 as an exposure mask, a phosphor screen is manufactured by an exposure technique in the order of black matrix (BM), stripe blue, stripe green, and stripe red.

B. The stripe spacing of the manufactured phosphor screen is inspected to check for irregularly spaced portions. When a phosphor screen having irregularly spaced stripes is completed, a bolt 20 for fixing the spring 14 and the washer 18 is formed.
And loosen the aperture grill 4 by rotating the adjusting screw 22.
Is adjusted again, and the fixing bolt is tightened to fix the spring 14 and the washer 18 again.

The readjustment of the position of the aperture grill 4 is performed by adjusting the washers 18 of all the holders of the four stud pins 8 projecting from the panel 1. At this time, as shown in FIG. 8, 23a is a phosphor screen having stripes arranged at irregularly spaced intervals such that the stripe interval is large and the stripe interval is small as shown in FIG. The Q interval of the 23a portion is reduced and the Q interval of the 23b portion is increased so that the stripe interval within each trio 9d of the 23b portion is uniform. The value of the Q interval after the adjustment is determined by, for example, measuring the increased or decreased stripe interval in the portion 23a or 23b and calculating based on the result. The stud pins to be adjusted hardly move at one location, but may be at two or three locations depending on the state of the completed phosphor screen.

C. Once the phosphor screens with irregular intervals are completed, all the phosphor screens (including those at regular intervals) are removed with a chemical. d. A BM is formed on the inner surface of the panel 1 from which the fluorescent screen has been removed in c, and the fluorescent screen is re-produced by an exposure technique in the order of stripe blue, stripe green, and stripe red. e. The above steps b to d are repeated, and after the regularly spaced stripes are completed, the washer 18 is completely fixed to the spring 14 by welding. Thus, the fabrication of the phosphor screen is completed.

[0029]

As described above, the present invention has, at one end of a strip-shaped member made of an elastic material, a fitting hole with a stud pin projecting from an inner wall of a panel, and the position of the fitting hole is a movable portion. The distance between the inner surface of the panel and the color selection electrode is set by interposing a plurality of holders, the other ends of which are fixed to the color selection electrode, so that a regular stripe interval is obtained. A first step of incorporating a color selection electrode into the panel by using a color selection electrode as an exposure mask, a second step of forming a phosphor screen on the inner surface of the panel, and inspecting the completed phosphor screen to form a portion having an irregular stripe interval. Is included, the positions of the fitting holes of at least two holders are adjusted based on the size of the irregular stripe interval, and the third interval for resetting the interval between the inner surface of the panel and the color selection electrode is set. Process and A fourth step of removing a phosphor screen including regular stripe intervals and newly producing a phosphor screen, a fifth step of repeating the third and fourth steps, and a phosphor screen with regular stripe intervals could be produced. Then, since the method includes the sixth step of fixing the movable portion, even if a phosphor screen having an irregular stripe interval is formed, re-exposure is performed after readjusting the Q interval, and the phosphor screen having the regular stripe interval is formed. Can be remade.

The color selection electrode holding member according to the present invention comprises a band member made of an elastic material, one end of which is fitted to a stud pin projecting from the inner wall of the panel, and the other end of which is a color selection electrode. And a color selection electrode holding member fixed at a predetermined distance to the inner surface of the panel and arranged so that its long side is orthogonal to the tube axis. Since the position of the fitting hole is adjustable in the width direction of the band-shaped member, even if a phosphor screen having an irregular stripe interval is formed, re-exposure is performed after readjusting the Q interval. Thus, it is possible to recreate the phosphor screen with regular stripe intervals.

Further, the fitting hole position adjusting means opens a through hole at one end of the band member with a diameter larger than the hole for fitting the stud pin, and forms a pair of bolt holes sandwiching the hole with the long side of the band member. A washer receiving portion formed by being opened on a parallel line, and a washer having a thin hole made of a thin piece of steel, and having a slit formed in parallel with the fitting hole for the stud pin and the hole, and passing through the slit. Since it is composed of a washer fixing bolt for fixing the washer to the washer receiving portion, it is easy to readjust the Q interval.

Further, a first bent portion in which the washer receiving portion is bent in an L shape along the long side, a second bent portion in which the end of the washer is bent in an L shape at a fold perpendicular to the slit, and a second bent portion. Since there is provided a relative position adjusting mechanism including an adjusting screw for adjusting the relative position between the washer and the washer receiving portion by screwing into the first and second bent portions, the relative position between the washer and the washer receiving portion is provided. Can be finely adjusted easily. The Q interval can be finely changed correspondingly.

Further, since the adjusting screw is provided so as to be adjustable from the electron gun side, the adjustment of the Q interval is further facilitated.

Further, a guide is formed by folding one side edge parallel to the washer slit so as to enclose the washer receiving portion, and guides relative movement of the washer by the adjusting screw. The part can be adjusted and moved without rattling or shaking in the slit length direction.

Further, since the washer and the washer receiving portion are provided with minute irregularities on the surface where the washer and the washer receiving portion are in contact with each other or on both surfaces of the washer and the washer receiving portion, the frictional force at the contact surface between the washer and the washer receiving portion is provided. And the fixing pressure increases accordingly. Therefore, a change in the Q interval due to vibration or the like during the phosphor screen manufacturing process can be reduced.

Further, since the metal for the washer fixing bolt is made of a metal having excellent heat resistance, it is possible to prevent a decrease in the tightening force due to the thermal expansion of the fixing bolt in the heat process before the phosphor screen is manufactured. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a spring and a washer are combined in the first embodiment.

FIG. 2 is a perspective view showing a spring according to the first embodiment.

FIG. 3 is a perspective view showing a spring hole position adjusting washer.

FIG. 4 is a perspective view showing an outline of a cathode ray tube.

FIG. 5 is a perspective view showing an aperture grill held on a panel using a conventional holder.

FIG. 6 is a perspective view showing a conventional long side holder.

FIG. 7 is a perspective view showing a conventional end side holder.

FIG. 8 is a perspective view of a model showing a phosphor screen having stripes with mixed large and small intervals.

[Explanation of symbols]

1 panel, 2 funnels, 3 necks, 4 aperture grills, 41 slits, 8 stud pins, 9
Phosphor screen, 12a spring hole, 12b through hole, 14
Spring, 15 bolt holes, 18 washers, 19
Slits, 20 fixing bolts, 23a degrouping part, 23b grouping part, 24BM.

Claims (8)

[Claims] 1. A stud pin protruding from an inner wall of a panel is fitted to one end of a band-shaped member made of an elastic material.
The inner surface of the panel and the color selection electrode, having a fitting hole configured to be adjustable in position and interposing a plurality of holders to which the color selection electrode is fixed at the other end so that a regular stripe interval is obtained. A first step of setting a distance between and incorporating a color selection electrode into the panel, a second step of forming a phosphor screen on the inner surface of the panel using the color selection electrode as an exposure mask, and inspecting the completed phosphor screen, When the irregular stripe interval is included, the positions of the fitting holes of at least two holders are adjusted based on the size of the irregular stripe interval, and the interval between the panel inner surface and the color selection electrode is adjusted. A fourth step of resetting the above, a fourth step of removing the phosphor screen including the irregular stripe interval and forming a new phosphor screen, and a fifth step of repeating the third and fourth steps Process and regular strike When the phosphor screen of the type interval could be formed,
And a sixth step of fixing the position of the fitting hole. 2. A band-shaped member made of an elastic material, one end of which is fitted to a stud pin protruding from an inner wall of the panel, and the other end is fixed to a color selection electrode and has a long side. In a color selection electrode holding member that is disposed so as to intersect with the tube axis and holds the color selection electrode at a predetermined interval with respect to the inner surface of the panel, the position of the fitting hole with the stud pin is determined by changing the position of the band-shaped member. A color selection electrode holding member for a cathode ray tube, comprising a fitting hole position adjusting means which is adjustable in a width direction. 3. The fitting hole position adjusting means is provided at one end of the band-shaped member, is provided with a through hole having a diameter larger than the fitting hole with the stud pin, and is provided in the long side direction of the band member with the through hole interposed therebetween. A washer receiving portion having a pair of bolt holes, a fitting hole for a stud pin, and a washer having an elongated hole arranged in parallel with the hole interposed therebetween; and a washer penetrating through the elongated hole of the washer. 3. A color selecting electrode holding member for a cathode ray tube according to claim 2, further comprising a washer fixing bolt fixed to the receiving portion. 4. A first bent portion in which a washer receiving portion of the band-shaped member is bent in an L shape along a long side of the band-shaped member, and an end portion of the washer is bent in an L shape at a fold perpendicular to the long hole. Second
4. A relative position adjusting mechanism comprising an adjusting screw for adjusting the relative position between the washer and the washer receiving portion by screwing into the bent portion of the first member and the first and second bent portions. A color selecting electrode holding member for a cathode ray tube according to the above. 5. The color selection electrode holding member for a cathode ray tube according to claim 4, wherein the adjusting screw is provided so as to be adjustable from the electron gun side. 6. A guide portion formed by folding one side edge parallel to the long hole of the washer so as to surround the washer receiving portion,
The color selection electrode holding member for a cathode ray tube according to claim 4 or 5, wherein the guide portion guides relative movement of the washer by the adjusting screw. 7. The surface of the washer and the washer receiving portion which are in contact with each other, or minute irregularities are provided on both surfaces of the washer and the washer receiving portion. A color selection electrode holding member for a cathode ray tube. 8. The color selecting electrode holding member for a cathode ray tube according to claim 3, wherein the washer fixing bolt is made of a metal having excellent heat resistance.