JPH11297204A - Assembly method and assembly device for cathode-ray tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembly method and an assembly device for a cathode- ray tube which can easily mount multiple deflection devices at predetermined positions with respect to a vacuum envelope and can adjust them. SOLUTION: When multiple individual deflection devices 20 are mounted at predetermined positions of a vacuum envelope 5, tire multiple individual deflection devices are retained in a predetermined relative positional relationship with one another in advance by the use of a supporting unit 42 and thereafter, the individual deflection devices are connected to a deflection driving circuit. Then, the supporting unit 42 and the vacuum envelope are mounted to a supporting table 44 and the individual deflection devices 20 are supported in the vicinity of the predetermined positions with respect to the vacuum envelope. Thereafter, each of the individual deflection devices 20 is positioned at the predetermined position with all the individual deflection devices 20 driven by the deflection driving circuit and the multiple positioned individual deflection devices are fixed to the vacuum envelope at the same time.

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,
In particular, the present invention relates to a cathode ray tube which scans a substantially continuous phosphor screen by dividing an electron beam emitted from a plurality of electron guns into a plurality of display areas by deflecting the electron beams by a plurality of deflecting devices. .

[0002]

2. Description of the Related Art In recent years, various studies have been made on a high-definition picture tube having a high-definition broadcast or a large screen associated therewith. Generally, in order to achieve high resolution of a picture tube, the spot diameter of an electron beam on the phosphor screen must be reduced. On the other hand, conventionally, the electrode structure of the electron gun has been improved, or the diameter and length of the electron gun itself have been increased, but no satisfactory results have been obtained yet. This is mainly because the distance from the electron gun to the phosphor screen becomes longer as the picture tube becomes larger, and the magnification of the electron lens becomes too large. Therefore, in order to realize high resolution, it is important to reduce the distance (depth) from the electron gun to the phosphor screen. Also, in this case, if the wide angle deflection is used, the magnification difference between the center and the periphery of the screen increases. For this reason, wide-angle deflection is not advantageous for achieving high resolution.

As a picture tube which solves such a problem,
For example, Japanese Patent Application Laid-Open No. 5-36363 discloses that a face plate and a rear plate are formed flat, and a phosphor screen having an integrated structure formed on an inner surface of the face plate is formed by a plurality of electron guns attached to the rear plate. There is disclosed a cathode ray tube which scans by dividing into a plurality of regions by an emitted electron beam.

More specifically, this type of cathode ray tube has an integral structure formed on the inner surface of a rectangular face plate, that is, a substantially continuous phosphor screen, and a rear plate opposed to the phosphor screen. And a plurality of individual electron guns disposed in the plurality of necks provided in the above. The individual electron gun emits substantially three electron beams toward the phosphor screen, and deflects the electron beam by an individual deflecting device provided for each individual electron gun, thereby dividing the phosphor screen into a plurality of regions. Scan by dividing. Then, the small images drawn in these divided display areas are combined to display one large image on the phosphor screen.

[0005] As described above, when an image described in a plurality of areas is displayed substantially as a single image as a whole,
The individual deflecting devices that scan each area must be adjusted so that the images have a continuous connection that is visually uncomfortable at the boundary between adjacent display areas. Conventionally, each individual deflection device is adjusted so as to be arranged at an optimum position, and further, each individual deflection device is adjusted to an optimal state so that boundaries between the divided display areas are continuously connected. ing.

In the case of a color cathode ray tube, such adjustment for each individual deflecting device involves a difference in a scanning range, a difference in linearity between a central portion and a peripheral portion in a divided display area, and a difference between a continuous display area and an adjacent divided display area. This is performed in consideration of differences in linearity and scanning range having different characteristics, and differences in image display positions including image distortion and the like in adjacent divided display areas.

In order to perform the above adjustment reliably and easily, Japanese Patent Application No. 7-47154 discloses that the trajectories of electron beams emitted from a plurality of individual electron guns are set in the normal direction from the center position of the divided display area. And the virtual center position of the deflecting magnetic field generated by the individual deflecting device and the virtual reference axis are substantially matched, so that all the divided display screens have substantially the same image characteristics. An adjustment method is disclosed.

Japanese Patent Application No. 8-209442 discloses that a plurality of individual deflecting devices are driven by a common deflecting drive circuit, so that all the individual deflecting devices have substantially the same deflection current waveform, and the individual deflecting devices can be easily adjusted. A method has been disclosed for enabling this.

[0009]

However, when a plurality of individual deflecting devices are driven by a common deflection driving circuit as described above, in particular, the horizontal deflection coils and the vertical deflection coils of the plurality of individual deflecting devices are connected to each other. When each is connected in series and the final end is connected to a common deflection drive circuit, unnecessarily lengthening the connection wiring with respect to the arrangement interval between the individual deflection devices unnecessarily increases the resistance of the deflection device. In addition, it is not preferable in view of the electric characteristics and the cost of the wire material is not advantageous.

[0010] Therefore, in order to optimize the image in the divided display area corresponding to each individual deflecting device, it is connected to a deflection driving circuit so as to drive only the individual deflecting device for adjustment, and finally all the individual deflecting devices are adjusted. When the adjustment of the device is completed, the method of connecting the individual deflection devices as described above is used.

However, in this case, the adjustment method is such that the individual deflecting device to be adjusted is once connected to the deflecting drive circuit for adjustment, and after adjustment, is reconnected to the deflecting drive circuit common to the plurality of individual deflecting devices. From 1
In a color picture tube device having a plurality of individual deflection devices in one vacuum envelope, the adjustment is very troublesome.

The connection between the individual deflecting devices is generally performed by soldering the wiring. However, in the case of the above-described cathode ray tube, a plurality of deflecting devices are provided adjacent to each other, so In such a case, the heat source and the vacuum envelope may come close to each other, causing a local thermal strain in the vacuum envelope and causing a breakdown.

Further, when a plurality of individual deflecting devices are arranged adjacent to each other, these individual deflecting devices affect each other magnetically, and affect the amplitude and image distortion in the image characteristics of the divided screen. That is, each individual deflection device magnetically affects not only the image characteristics of the corresponding divided screen, but also other adjacent divided screens. Therefore, even if the individual deflecting device connected to the adjustment deflecting drive circuit is adjusted to the optimal image state, the optimal image state is destroyed by the magnetic influence exerted by the other individual deflecting devices, and the individual deflecting device is adjusted again. Need to be performed. However, it is difficult to readjust the individual deflection device once fixed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to assemble a cathode ray tube in which a plurality of deflecting devices can be easily mounted and adjusted in a predetermined position with respect to a vacuum envelope. It is to provide a method and an assembly device.

[0015]

In order to achieve the above object, a method of assembling a cathode ray tube according to the present invention comprises a substantially rectangular face plate having a phosphor screen formed on an inner surface thereof and a face plate facing the face plate. A vacuum envelope having a substantially rectangular rear envelope having a plurality of necks, and an electron beam directed toward the phosphor screen, each being disposed in the plurality of necks. A plurality of individual electron guns, each of which deflects an electron beam emitted from the plurality of individual electron guns, divides the phosphor screen into a plurality of regions, and scans the plurality of regions; A deflection driving circuit for driving the deflection device, wherein the plurality of individual deflection devices are arranged in a predetermined relative positional relationship, and A plurality of individual deflecting devices arranged at positions are supported in the vicinity of a predetermined position with respect to the vacuum envelope,
The position of each individual deflecting device supported near the predetermined position is adjusted to the predetermined position, and the plurality of adjusted individual deflecting devices are fixed to the vacuum envelope.

Further, according to the assembling method of the present invention, the position of each individual deflection device is adjusted while all the individual deflection devices are driven by the deflection drive circuit.

According to the assembling method having the above structure, a plurality of individual deflection devices are held in a predetermined relative positional relationship in advance,
It is possible to electrically connect the individual deflection devices in advance with the shortest wiring. In addition, the individual deflection devices can be adjusted in a state where the individual deflection devices are mutually affected by the magnetic influence, and the individual deflection devices can be easily and accurately adjusted.

Further, according to the assembling method according to the present invention,
When the individual deflecting devices are fixedly arranged on the vacuum envelope, a plurality of individual deflecting devices are simultaneously fixed. Furthermore, according to the present invention, the plurality of individual deflection devices can be adjusted independently in a plane substantially parallel to the face plate, and in a direction substantially orthogonal to the face plate. Are simultaneously supported so as to be position adjustable.

On the other hand, a substantially rectangular face plate having a phosphor screen formed on an inner surface thereof, and a substantially rectangular rear envelope provided with a plurality of necks and opposed to the face plate. A plurality of individual electron guns each disposed in the plurality of necks and emitting an electron beam toward the phosphor screen, and electrons emitted from the plurality of individual electron guns, respectively. The present invention relates to an apparatus for assembling a cathode ray tube, comprising: a plurality of individual deflecting devices for deflecting a beam and dividing the phosphor screen into a plurality of regions for scanning; and a deflection driving circuit for driving the individual deflecting device. The cathode ray tube assembling apparatus according to the above, supports each of the individual deflecting devices so as to be position-adjustable in an arbitrary plane, and connects the plurality of individual deflecting devices to the The support means, which is held in a predetermined arrangement relationship corresponding to the hook portion, and the support means, which supports the support means movably along a direction orthogonal to the arbitrary plane, and wherein the face plate and the arbitrary plane And a support that holds the vacuum envelope in a substantially parallel state.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, a description will be given of a cathode ray tube to which an assembling method and an assembling apparatus according to the present embodiment are applied.

As shown in FIGS. 1 to 3, the cathode ray tube has a vacuum envelope 5, which has a substantially rectangular flat face plate 1 and a peripheral edge of the face plate 1. A frame-like side wall 2 joined to the portion and extending substantially perpendicular to the face plate 1; and a substantially rectangular flat rear joined to the side wall 2 and arranged in parallel with the face plate 1. It has a plate 3 and a plurality of funnels 4 joined to the rear plate 3.

The rear plate 3 has a plurality of, for example, 2
Zero rectangular openings 6 are formed, and are provided in a matrix form, for example, in five vertical rows and four horizontal rows. The plurality of funnels 4 have respective openings 6.
, And five in the horizontal direction (X direction) and four in the vertical direction (Y direction).
There are zero.

Incidentally, the side wall 2, the rear plate 3, and the funnel 4 constitute a rear envelope in the present invention, and may be integrally formed in advance. Further, the rear plate is not limited to a flat shape, and may have a shape continuously curved with the funnel and the side wall.

On the inner surface of the face plate 1, blue, green,
An integrated phosphor screen 8 having a stripe-shaped three-color phosphor layer extending in the vertical direction that emits red light and a black stripe provided between the three-color phosphor layers is formed.

In the vacuum envelope 5, a phosphor screen 8 is provided.
, A flat shadow mask 9 is arranged. The shadow mask 9 has a plurality of effective portions corresponding to a plurality of regions R1 to R20 of the phosphor screen 8 which are divided and scanned by an electron beam, as will be described later. A hole is formed.

The shadow mask 9 is divided in the horizontal direction according to the number of divisions in the horizontal direction X of the area of the phosphor screen 8, and each divided mask is rear-mounted through a plurality of mask support members (not shown). It is supported on a plate 3. Between the face plate 1 and the rear plate 3,
A plate supporting member 11 composed of a plurality of metal columns that supports an atmospheric pressure load applied to the face plate 1 and the rear plate 3 is arranged. Each plate support member 1
1 has a base end fixed to the rear plate 3 and a front end in contact with the black stripe of the phosphor screen 8.

An electron gun 13 for emitting an electron beam is provided in each of the necks 12 provided on the plurality of funnels 4. Further, an individual deflection device 20 is mounted outside each neck 12. As shown in the figure, each individual deflecting device 20 includes a trumpet-shaped separator 22 formed of a synthetic resin and having a small-diameter end on the neck 12 side of the funnel 4 and a large-diameter end on the cone side, and a separator 22. A pair of saddle-shaped horizontal deflection coils 23 symmetrically arranged on the inner surface side of the separator 22, a cylindrical core 24 surrounding the outer surface of the separator 22, wound around the core 24, and And a toroidal vertical deflection coil 25 symmetrically arranged. An annular flange 26 is provided at an end of the separator 22 on the small diameter side, and a terminal block 28 is provided near the flange.
Is attached.

As shown in FIG. 3, a plurality of individual deflection devices 2
The zero horizontal deflection coil is connected in series to a deflection drive circuit 32 via a wiring 30. The vertical deflection coils of the plurality of individual deflection devices 20 are connected in series to a deflection drive circuit 32 via a wiring 30.

In the above-structured cathode ray tube, the electron gun 13
Are deflected in the horizontal and vertical directions by the magnetic field generated by the deflecting device 20, and the phosphor screen 8 is moved through the shadow mask 9 into a plurality of regions, five in the illustrated example. 4 vertically, 2 in total
Scanning is performed by dividing into 0 regions R1 to R20. And
The images drawn on the phosphor screen 8 by the divided scanning are connected by signals applied to the electron gun 13 and the deflecting device 20 to reproduce one large image without a break on the entire surface of the phosphor screen 8.

Next, an assembling apparatus and an assembling method according to the present embodiment for attaching the individual deflecting device 20 to the cathode ray tube having the above-described configuration will be described. As shown in FIG. 4, the assembling apparatus 40 connects the 20 individual deflecting devices 20 in a predetermined relative positional relationship, that is, the neck 1 of the vacuum envelope 5.
Support unit 42 for supporting the relative positional relationship corresponding to 2
And a support base 44 for holding the support unit and the vacuum envelope 5.

Support unit 42 functioning as support means
Is connected to four sets of elongated support rods 46 each extending in the horizontal direction X and arranged in parallel at a predetermined distance from each other, and one end and the other end of the support rods extending in the vertical direction Y. And a pair of elongated connecting plates 48. Each set of support rods 46 extends in parallel with each other at a predetermined interval, and has five support portions 50 that support the individual deflecting devices 20 in a position-adjustable manner. These support portions 50 are formed at predetermined intervals along the axial direction of the support rod 46.

As can be clearly seen from FIGS. 6 to 8, each set of support rods 46 is positioned at each support 50.
Each of the projections 52 has an arc-shaped projection 52 protruding in a direction away from each other, and an engagement groove 54 is formed on the inner surface side of each projection. These engagement grooves 54 have a predetermined width and diameter so that the flange 26 of the individual deflection device 20 can be engaged. Further, a screw hole 53 extending in the Z direction is formed in each protruding portion 52, and is opened in the engaging groove 54.

The individual deflecting device 2 is supported by the support unit 42.
In the case where 0 is supported, the flange 26 of the individual deflecting device is engaged with the engaging groove 54 in each support portion 50 of the support rod 46. Thereby, the flange 60 is connected to the pair of support rods 4.
6 is supported in a state sandwiched from above and below. Then, in this state, both ends of the support rod 46 are screwed to the connecting plate 48.

Here, the engagement groove 54 in each support portion 50
Is formed to be larger than the diameter and width of the flange 26, and the flange is formed with an engagement gap 5 with a gap for adjustment.
4 is engaged. Therefore, in a state where the individual deflecting device 20 is held by an adjustment head (not shown),
Position adjustment such as rotation can be performed.

However, in this state, since there is a gap between the flange 26 and the engagement groove 54, each individual deflection device 20 cannot be stably supported by the support rod 46. Then, a screw 56 for temporary fixing is screwed into a screw hole 53 provided in each support portion 50, and the flange 26 of the individual deflecting device 20 is pressed against the inner surface of the engaging groove 54 to be temporarily fixed. Thereby, the individual deflecting device 20 can maintain a fixed relationship with the support rod 46, and the temporary fixing screw 5
By loosening 6, the position can be adjusted while being supported by the support rod 46.

In this manner, the individual deflecting devices 20 are attached and temporarily fixed to the respective support portions 50 of the support unit 42, so that the twenty individual deflecting devices 20 maintain a predetermined relative positional relationship with each other, that is, Are supported by the support unit 42 while maintaining the relative positional relationship corresponding to the neck of the vacuum envelope 5. As shown in FIGS. 4 and 5,
Elongated holes 58 extending in the Z direction are provided at the upper end and the lower end of each connecting plate 48, and a fixing screw 60 for adjustment can be inserted into each elongated hole 58.

As shown in FIG. 4, the support base 44 has a flat mounting surface 44a on which the vacuum envelope 5 and the support unit 42 are mounted. A support frame 62 for supporting the vacuum envelope 5 and the support unit 42 at predetermined positions is provided on the mounting surface 44a.

The support base 44 is used for precisely positioning the vacuum envelope 5 and adjusting the electron beam trajectory.
It is manufactured according to the design standard of the vacuum envelope 5. Further, the support unit 42 is also manufactured such that the individual deflection device 20 is arranged substantially in accordance with the design standard with respect to the vacuum envelope 5. Accordingly, by setting the support unit 42 to which the twenty individual deflection devices 20 are attached and the vacuum envelope 5 on the support base 44, the individual deflection devices can be arranged near the design reference position.

As shown in FIG. 9, the support unit 42
By fixing the upper and lower ends of the connecting plate 48 to predetermined positions of the support frame 62 using the fixing screws 60,
4 is attached. In the mounted state, the fixing screw 6
By loosening 0, the support unit 42 can be adjusted to the optimum position only in the Z direction while all the support rods 46 maintain the relation parallel to the face plate 1 of the vacuum envelope 5. The optimum position in the Z direction is determined mainly based on the landing state around the divided area. However, in this adjustment, since the plurality of individual deflecting devices 20 are supported in a fixed relationship by the support rods 46 as described above, the Z of the individual deflecting device can be determined for any one divided region.
By adjusting the direction optimum position, it is possible to adjust other plural individual deflection devices simultaneously.

Next, the assembling apparatus 4 constructed as described above is used.
The procedure for assembling and adjusting the cathode ray tube using 0 will be described. First, five individual deflecting devices 20 are mounted on a plurality of support portions 50 provided on each set of support rods 46 of the support unit 42, and are held by temporarily fixing screws 56.

Subsequently, four sets of support rods 46 each having five individual deflection devices 20 attached thereto are connected to each other by a connection plate 48. As a result, the twenty individual deflection devices are supported in a predetermined relative positional relationship, that is, in a state very close to the state when mounted on the vacuum envelope 5.

Next, in this state, the individual deflection device 20 is electrically connected to the deflection drive circuit 32 by wiring. After the completion of the wiring connection, the vacuum envelope 5 and the support unit 20 are mounted and supported at predetermined positions on the support base 44. Then, the fixing screw 60 is adjusted, and the individual deflecting device 2 for the vacuum envelope 5 is adjusted.
0 so that the position in the Z direction is optimal.
Is adjusted in the Z direction. After the adjustment, the support unit 42 is fixed by the fixing screw 60.

Subsequently, each individual deflection device 20 is adjusted. That is, an adjustment head (not shown) is connected to the individual deflecting device 20 to be adjusted, and the position of the individual deflecting device is adjusted in the XY directions, that is, in a plane parallel to the face plate 1 of the vacuum envelope 5 by the adjusting head. At this time, the temporary deflecting screw 56 is removed and the individual deflecting device 20 is
To avoid interference.

It is desirable that the individual deflecting device 20 to be adjusted be fixed to the vacuum envelope 5 immediately after the adjustment is completed. However, in order to shorten the adjusting time and to make the periphery of the individual deflecting device 20 dense with an adjusting head or the like. Therefore, it is better to re-hold the support rod 46 while maintaining the state of completion of the adjustment.

In this case, since there is a gap between the support rod 46 and the individual deflecting device 20 for an adjustment margin, there is no problem in the X and Y directions. This restricts the position of the individual deflection device 20. Therefore, for example, when the fixing screw 60 of the support unit 42 is not properly adjusted, the individual deflection device 20 is held again at a position different from the adjustment position by the adjustment head. However, regarding this problem, the manufacturing accuracy of the vacuum envelope 5 and the individual deflecting devices 20 is extremely high.
The error of the optimal position in the Z direction between
The Z-direction adjustment position of the individual deflecting device 20 is shifted by 0.1 with respect to the position initially set with the fixing screw 60 of the support unit 42.
There is almost no difference of more than mm.

Therefore, in most cases, it is possible to temporarily fix to the support rod 46 again while maintaining the position adjusted by the adjustment head. The plurality of individual deflection devices 20 are fixed to the vacuum envelope 5 at the same time. In this case, the vacuum envelope 5 and the individual deflecting device 20 are fixed to each other with a resin material or the like, and after completely fixed, the support unit 42 is removed from the individual deflecting device 20.

The support unit 42 is made of a material that does not affect the cathode ray tube magnetically. Next, a description will be given of a deflection driving method for adjusting an arbitrary individual deflection device 31. Assembly device 40 as described above
In the case where the adjustment is performed by using the method, there is a problem that the plurality of individual deflection devices 20 magnetically affect each other. FIG. 10 shows the relationship of the magnetic field when all the individual deflection devices 20 are driven by a common deflection driving circuit in a state where a plurality of individual deflection devices 20 are arranged adjacent to each other. Even if the individual deflecting devices 20 to be adjusted are individually deflected and driven without considering such magnetic influences, all the individual deflecting devices 20 are driven by the common deflection driving circuit after the adjustment is completed. When it is deflected, the image amplitude, image distortion, and the like of each divided region mutually affect the magnetic effect, as in the cross hatch pattern example shown in FIG. Image display cannot be performed.

Therefore, according to the present embodiment, when adjusting any individual deflecting device 20, all the individual deflecting devices 20 are always deflected and driven, so that the magnetic influence of each individual deflecting device 20 on each other is reduced. Correction is performed at the same time. With this method, it is not necessary to newly provide any other correction means for the magnetic influence between the individual deflection devices 20.
As shown in FIG. 11B, the image can be adjusted so that the images are continuously connected in the boundary portion B between the divided areas, and a plurality of divided screens can be easily combined to form one image without breaks or overlaps. Can be displayed.

According to the assembling apparatus and assembling method for a cathode ray tube configured as described above, a plurality of individual deflection devices 20 are temporarily fixed in a predetermined relative positional relationship in advance and arranged around the vacuum envelope. Also, when adjusting any individual deflection device, another individual deflection device can be arranged near the adjustment position.

Further, the wiring connection can be performed in a state where the individual deflection device 20 is supported in a predetermined relative positional relationship in advance.
Wiring connection at the shortest distance can be easily performed. At the same time, wiring connection between the individual deflecting devices can be performed at a place remote from the vacuum envelope 5, and it is necessary to consider thermal strain destruction of the vacuum envelope 5 due to heat generated by soldering at the time of wiring connection. Disappears.

Further, by deflecting and driving all the individual deflecting devices in the vicinity of a predetermined position using the support unit, correction factors due to mutual magnetic influence between the individual deflecting devices during adjustment are also reduced. , Can be corrected simultaneously when adjusting the individual deflection devices.

The present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the present invention. For example, in the above embodiment, the deflection individual devices arranged in the horizontal direction are supported by the respective support rods of the support unit, but the respective support rods are arranged to extend in the vertical direction, and a plurality of the individual support rods are arranged in the vertical direction. May be supported. In this case, the connecting plates are arranged along the horizontal direction.

Although the individual deflecting device is directly supported on the support rod, the individual deflecting device may be supported on the support rod via an individual component having an adjustment and holding mechanism. In this case, it is possible to individually adjust the position of the individual deflection device in the Z direction.

Further, the individual deflecting device is arranged in advance on a setting table where the position of each individual deflecting device coincides with the design standard, and the supporting unit is attached and connected to provide a more accurate individual deflecting device. Can be temporarily fixed.

Further, in the above-described embodiment, as the vacuum envelope, a substantially rectangular face plate, a substantially rectangular rear plate facing the face plate, and a joint to the rear plate are provided. And a plurality of funnels, but the present invention is not limited to this, and a substantially rectangular face plate on which a phosphor screen is formed, and a plurality of A vacuum envelope composed of a funnel having a neck portion may be used.

[0056]

As described above in detail, according to the present invention, a plurality of individual deflection devices are disposed around the vacuum envelope in a state temporarily fixed in a predetermined relative positional relationship.
When adjusting any individual deflecting device, another individual deflecting device can be arranged near the adjustment position. Thereby, the adjustment time can be reduced and the adjustment cost can be reduced. In addition, by adjusting the position of the individual deflecting devices arranged in the vicinity of the predetermined position in a state where the individual deflecting devices are driven to deflect, it is possible to simultaneously correct the adjustment error caused by the magnetic influence between the individual deflecting devices when adjusting the individual deflecting devices. . Therefore, the adjustment of the individual deflecting device can be performed accurately and easily.

As described above, according to the present invention, it is possible to provide a cathode ray tube assembling method and an assembling apparatus in which a plurality of deflecting devices can be easily mounted and adjusted at predetermined positions with respect to a vacuum envelope. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cathode ray tube to which an assembling method and an assembling apparatus of the present invention are applied.

FIG. 2 is a plan view of the cathode ray tube.

FIG. 3 is an exploded perspective view showing a vacuum envelope and a deflection device of the cathode ray tube.

FIG. 4 is an exploded perspective view showing the assembling apparatus according to the embodiment of the present invention.

FIG. 5 is a perspective view showing a support unit of the assembling apparatus.

FIG. 6 is an exploded perspective view showing a support portion of the support unit and an individual deflection device.

FIG. 7 is a perspective view showing a state in which an individual deflecting device is attached to the support.

FIG. 8 is a sectional view taken along the line BB in FIG. 7;

FIG. 9 is a plan view showing a state where the support unit and the vacuum envelope are attached to the assembling apparatus.

FIG. 10 is a diagram schematically showing a flow of a magnetic field when the plurality of individual deflection devices located adjacent to each other are driven.

FIG. 11 is a view showing a state in which a cross hatch pattern is displayed in a divided area of the cathode ray tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Face panel 3 ... Rear panel 4 ... Funnel 5 ... Vacuum envelope 8 ... Phosphor screen 12 ... Neck 13 ... Electron gun 20 ... Individual deflecting device 30 ... Wiring 32 ... Deflection drive circuit 40 ... Assembly device 42 ... Supporting unit 44 ... Support table 46 ... Support rod 48 ... Connecting plate 50 ... Support part 54 ... Engaging groove 56 ... Temporary set screw

Claims (8)

[Claims] A substantially rectangular face plate having a phosphor screen formed on an inner surface thereof; a substantially rectangular rear envelope provided with a plurality of necks provided opposite to the face plate; A plurality of individual electron guns each disposed in the plurality of neck portions and emitting an electron beam toward the phosphor screen, and electrons emitted from the plurality of individual electron guns, respectively. A method of assembling a cathode ray tube, comprising: a plurality of individual deflection devices for deflecting a beam and dividing the phosphor screen into a plurality of regions for scanning; and a deflection driving circuit for driving the individual deflection device. The individual deflecting devices are arranged in a predetermined relative positional relationship, and the plurality of individual deflecting devices arranged in the predetermined relative position are located near a predetermined position with respect to the vacuum envelope. And adjusting the position of each individual deflection device supported near the predetermined position to the predetermined position, and fixing the position-adjusted plurality of individual deflection devices to the vacuum envelope. How to assemble the tube. 2. The method of assembling a cathode ray tube according to claim 1, wherein the position of each individual deflecting device is adjusted while all the individual deflecting devices are driven by the deflection driving circuit. 3. The method of assembling a cathode ray tube according to claim 1, wherein when fixing the individual deflection devices to the vacuum envelope, the plurality of individual deflection devices are fixed simultaneously. 4. The individual deflecting device is supported so as to be independently position-adjustable in a plane substantially parallel to the face plate, and a plurality of individual deflecting devices are simultaneously provided in a direction substantially orthogonal to the face plate. The method for assembling a cathode ray tube according to any one of claims 1 to 3, wherein the cathode ray tube is supported so as to be adjustable in position. 5. After electrically connecting the plurality of individual deflecting devices arranged in the predetermined relative positional relationship to the deflection driving circuit, the plurality of individual deflecting devices are moved to a predetermined position with respect to the vacuum envelope. The method for assembling a cathode ray tube according to any one of claims 1 to 4, wherein the cathode ray tube is supported near a position. 6. A substantially rectangular face plate having a phosphor screen formed on an inner surface thereof, a substantially rectangular rear envelope provided with a plurality of necks and opposed to said face plate, A plurality of individual electron guns each disposed in the plurality of neck portions and emitting an electron beam toward the phosphor screen, and electrons emitted from the plurality of individual electron guns, respectively. A cathode ray tube assembling apparatus, comprising: a plurality of individual deflecting devices for deflecting a beam to divide the phosphor screen into a plurality of regions for scanning; and a deflection driving circuit for driving the individual deflecting device. Support means for supporting the individual deflecting devices in a predetermined arrangement relationship corresponding to the neck portion, and supporting each individual deflecting device so as to be position-adjustable in an arbitrary plane. The support means is supported so as to be position-adjustable along a direction orthogonal to the arbitrary plane, and the vacuum envelope is held in a state where the face plate is positioned substantially parallel to the arbitrary plane. A cathode ray tube assembling apparatus, comprising: a support base; 7. The support means connects a plurality of elongated support members which are arranged in parallel at a predetermined interval and extend in parallel with the arbitrary plane, and end portions of the plurality of support members. A pair of connecting members, each supporting member being located apart from each other along the longitudinal direction of the supporting member, and having a plurality of supporting portions which respectively support the deflecting device in a position-adjustable manner. The apparatus for assembling a cathode ray tube according to claim 6, wherein: 8. A cathode ray tube assembling apparatus according to claim 7, wherein said support means includes a temporary fixing means for temporarily fixing each individual deflection device to the corresponding support portion.