JPH05299039A - Image receiving tube device - Google Patents

Abstract

PURPOSE:To simplify an adjustment of a deflecting device to an image receiving tube by forming the deflecting device in such a structure as having a plurality of individual coil parts arranged in respective individual electron guns and magnetic cores to connect these individual coil parts to each other. CONSTITUTION:In this image receiving tube device, respective electron beams emitted from a plurality of individual electron guns 7 are deflected by means of magnetic fields generated by means of respective pair of horizontal/vertical deflecting coils of a deflecting device 10 installed outside of respective funnels 4. Thereby, a phosphor screen 5 is divided/scanned in plural small areas. An image screen obtained on the screen 5 by means of this divided scanning is continued by means of signals being impressed upon the individual electron guns 7 or the deflecting device 10, so that a single continuous large image screen can be formed on the overall plane of the screen 5. When the deflection device 10 is constituted in this way, individual coil parts 13 can be set only by a simple adjustment by winding the horizontal/vertical deflection coils round magnetic cores 11 while using a standard jig or a standard image receiving tube beforehand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a picture tube device which scans a phosphor screen by dividing it into a plurality of regions by a plurality of electron beams, and more particularly to an image receiving device having an improved structure of a deflecting device for deflecting the electron beams. Regarding the pipe device.

[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 accompanying it. Generally, in order to achieve high resolution of the picture tube, the spot diameter of the 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 electron gun itself has been increased in diameter and length, but sufficient results have not yet been obtained. The main reason for this is that as the tube becomes larger, the distance from the electron gun to the phosphor screen becomes longer 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. Further, in this case, wide-angle deflection causes an increase in the difference in magnification between the center and the periphery of the screen. Therefore, wide-angle deflection is not a good idea for high resolution.

Therefore, a method of displaying a large screen with high resolution by arranging a plurality of independent small picture tubes has hitherto been known.
JP-A-48-90428, JP-A-49-2101
No. 9 and Japanese Utility Model Laid-Open No. 53-117130. This kind of method is effective for displaying a large screen with a large number of divisions arranged outdoors, but when displaying a medium-sized large screen with a screen size of about 40 inches,
The connection part of the screen between the areas is conspicuous, and an obtrusive image is reproduced. Therefore, when it is used as a home television receiver or as a terminal for graphic display in computer-aided design (CAD), the connection part of the screen becomes a fatal defect.

In contrast, US Pat. No. 3,071,7
No. 06, Japanese Utility Model Publication No. 39-25641, Japanese Patent Publication No. 42-4928 and Japanese Patent Publication No. 50-17167 disclose a structure in which a plurality of independent picture tube screens are integrated. Has been done. The picture tube having the phosphor screen of this integrated structure is composed of a face plate on which the phosphor screen is formed, a rear plate arranged to face the face plate, a plurality of funnels adjacent to the rear plate and each funnel. A plurality of necks extending to form a vacuum envelope, the face plate of which is glass and the rear plate is of glass or metal.

However, in such a structure, when the screen surface becomes large, the face plate and the rear plate must be thickened so that they can withstand atmospheric pressure (external pressure), and in the tube axis direction. It is also necessary to have a large curvature. As a result, the weight of the envelope becomes heavy. Further, if the curvature of the face plate becomes large, the screen becomes difficult to see. Furthermore, the distance between the phosphor screen and the electron gun enclosed in the neck becomes large, and the electron lens becomes unfavorable in terms of magnification.

In order to solve such a problem, conventionally, a face plate is flattened, and a phosphor screen formed on the inner surface of the face plate is spread over a plurality of regions by electron beams emitted from a plurality of individual electron guns. There is a cathode ray tube which is divided and scanned. In such a cathode ray tube, in order to support the atmospheric pressure applied to the face plate, it is necessary to arrange the supporting means inside.

Even if the screen of the picture tube is integrated and the supporting means is arranged inside, the problem still remains in practical use. That is, it is a structure and method for easily eliminating the connecting portion of the screen when the image is divided into a plurality of areas and scanned.

That is, in the conventional picture tube, a plurality of individual electron guns and a plurality of deflecting devices (individual deflecting devices) for scanning the plurality of electron beams emitted from the electron guns by dividing them into predetermined regions, respectively. And are provided. The number of individual electron guns and the number of individual deflection devices are the same. Therefore, in the picture tube device in which the picture tube and the deflecting device are combined, it is necessary to adjust the deflecting device for each individual deflecting device. This adjustment is practically possible in the case of a small number of individual deflecting devices or in the case of a monochrome picture tube which is relatively easy to adjust, but it becomes extremely difficult as the number of individual deflecting devices increases, and a color picture tube becomes difficult. In this case, color adjustment and electron beam concentration adjustment are required in addition to the adjustment of the up / down, left / right, and rotation of the image, which is extremely difficult.

[0009]

As described above, as a picture tube having a high resolution, a short depth, an easy-to-see screen, a simple structure, a high practical value, and a high industrial value, a phosphor screen is provided in a plurality of areas. There is known a picture tube device of a system of dividing and scanning. This picture tube device is provided with a plurality of individual electron guns and a plurality of individual deflection devices for deflecting a plurality of electron beams emitted from the electron guns and dividing each of predetermined regions for scanning. In such a picture tube device, adjustment is required for each individual deflecting device in order to eliminate the connection part of the screen when the plurality of regions are divided and scanned. This adjustment is practically possible in the case of a small number of deflecting devices or in the case of a monochrome picture tube that is relatively easy to adjust, but it becomes extremely difficult as the number of individual deflecting devices increases, and the In this case, color adjustment and electron beam concentration adjustment are required in addition to the adjustment of the up / down, left / right, and rotation of the image, which is extremely difficult.

The present invention has been made in order to solve the above-mentioned problems, and in a picture tube device of a system in which a phosphor screen is divided into a plurality of regions and scanned by a plurality of electron beams, the electron beams are used. It is an object of the present invention to provide a structure that can simplify adjustment of a deflecting device with respect to a picture tube for deflecting a predetermined area.

[0011]

A plurality of individual electron guns, a phosphor screen which is divided into a plurality of display regions and scanned by an electron beam emitted from each of the individual electron guns, and a plurality of individual electron guns. In a picture tube device comprising a deflecting device for deflecting an electron beam emitted from a cathode ray tube, the deflecting device is connected to a plurality of individual winding parts arranged corresponding to each individual electron gun. And a magnetic material core to be used.

Further, in particular, the magnetic material core has a cross beam shape.

[0013]

As described above, when the deflecting device has a structure having a plurality of individual winding portions arranged corresponding to each individual electron gun and a magnetic material core connecting these individual winding portions,
When mounted on a picture tube, no special adjustment of the deflector is necessary, which greatly simplifies the adjustment of the deflector with respect to the picture tube.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described based on embodiments with reference to the drawings.

FIG. 1 and FIG. 2 show a picture tube device which is one of the embodiments. This picture tube device is composed of a substantially rectangular flat glass face plate 1 and this face plate 1.
1. A side wall 2 that is joined to the peripheral portion of 1 and extends substantially perpendicularly to the face plate 1, and a substantially rectangular flat surface that faces the face plate 1 through the side wall 2 and is joined in parallel. The vacuum envelope includes a glass rear plate 3 and a plurality of funnels 4 joined to the rear plate 3. The rear plate 3 has a plurality of holes formed in the horizontal and vertical axis directions, and each funnel 4
Are joined around the opening so as to cover the opening, and a plurality of them are arranged in parallel in the horizontal and vertical axis directions.

A phosphor screen 5 is formed on the inner surface of the face plate 1. Further, inside each neck 6 provided in the plurality of funnels 4, an individual electron gun 7 for emitting an electron beam is arranged. Furthermore, between the face plate 1 and the rear plate 3,
A plurality of supporting means 8 are provided. This support means 8
Is for supporting the atmospheric pressure applied to the face plate 1 of the vacuum envelope 5, and the tip (phosphor screen
5 side end) is formed in a wedge shape. Further, on the outer side of the plurality of funnels 4, a deflecting device 10 for deflecting an electron beam emitted from each individual electron gun 7 is arranged corresponding to each individual electron gun 7 arranged in each neck 6. There is.

As shown in FIG. 3, the deflecting device 10 has a pair of long magnetic plate members facing each other at a predetermined distance in a horizontal and vertical axial direction corresponding to the arrangement of the funnel 4. A plurality of individual magnetic cores 11 arranged in parallel and a plurality of individual parts provided in a portion 12 into which the neck 6 is inserted, which is partitioned by a pair of horizontal and vertical magnetic plate members facing each other at a predetermined interval. And a winding portion 13.

The individual winding portion 13 is a pair of horizontal and vertical deflection coils wound around the neck insertion portion 12 partitioned by a pair of magnetic plate members facing each other with the above-mentioned predetermined distance.
It consists of 14H and 14V.

In such a deflecting device 10, a long magnetic plate material made of, for example, ferrite is combined in a grid pattern to form a magnetic material core 11, and a polyurethane copper wire, for example, is directly wound around the magnetic material core 11. , Horizontal and vertical deflection coils
Obtained by forming 14H and 14V. Before combining the magnetic material cores 11 in a checkerboard pattern, wind the polyurethane copper wire around a predetermined part of the magnetic plate material to form the horizontal and vertical deflection coils 14H and 14V, and then combine them in a checkerboard pattern. It can also be formed.

In this picture tube device, the electron beams emitted from the plurality of individual electron guns 7 are generated by a pair of horizontal and vertical deflection coils 14H and 14V of a deflection device 10 mounted outside each funnel 4. The fluorescent screen 5 is deflected by a magnetic field to generate a plurality of small regions R1, R
2, R3 ... R20 is divided and scanned. The screens obtained on the phosphor screen 5 by this divided scanning are connected by the signals applied to the individual electron guns 7 and the deflecting device 10, and form one large screen R without interruption on the entire surface of the phosphor screen 5. ..

By the way, as described above, a plurality of individual electron guns
The electron beam emitted from 7
In a picture tube that displays one large screen without interruption by scanning one phosphor screen by dividing it with the deflecting device 10 having a plurality of individual winding parts 13 provided corresponding to 7, The pincushion-shaped deflection distortion that occurs when the image is deflected must be exactly the same as that of the screen in the adjacent area and must be extremely small. Therefore, the setting (adjustment) of the deflection magnetic field of each individual winding portion 13 is required to be accurate and strict.

Further, as in the case of the conventional picture tube device,
In order to remove the pincushion-shaped deflection distortion, an inhomogeneous magnetic field distribution is required, and when correction (removal of deflection distortion) is performed using a correction current superimposed on the deflection current, or as an auxiliary Even when it is corrected by using it, the magnetic field distribution needs some non-uniform components.

In the case of performing a predetermined deflection without deflection distortion by a deflection device which generates a deflection magnetic field having a nonuniform magnetic field distribution, the relationship between the electron beam and the deflection magnetic field is
The electron beam always passes through the symmetry axis (center) of the deflection magnetic field,
You also have to pass through the center of the split screen. That is, in order to display a screen without deflection distortion, the center axis of the electron beam, the center of the deflection magnetic field, and the center of the split screen must be perfectly aligned, and the center axis of the electron beam must be perpendicular to the phosphor screen. I have to.

Further, in order to display a continuous screen, it is necessary to set the position of the deflection magnetic field in the rotation direction to be the same as that of the adjacent deflection device, and to set each horizontal and vertical component on the same axis. Is.

When the picture tube device is constructed as described above in order to solve these problems, the horizontal and vertical deflection coils 14H corresponding to each individual electron gun 7 are attached to the magnetic material core 11 by using the reference jig and the reference picture tube in advance. , 14V winding and individual winding part 13
The position of the individual winding portion 13 with respect to each individual electron gun 7 can be accurately and easily set. Therefore, it is possible to easily solve the above-mentioned problems.

That is, when the deflecting device 10 is constructed as described above, the horizontal and vertical deflection coils 14H and 14V are wound around the magnetic material core 11 in advance by using the reference jig and the reference picture tube, so that the individual winding portions are formed. It is possible to set (adjust) 13 to a predetermined positional relationship with high accuracy, and it is not necessary to adjust each deflection magnetic field region when it is attached to the picture tube, and it is possible to set only by simple adjustment. ..

Even if the deflection device 10 is constructed as described above, the center axis of the electron beam and the center of the deflection magnetic field are adjusted by using a centering magnet (not shown) as in the case of the conventional picture tube. It is carried out.

In the above embodiment, the deflecting device having the structure in which the individual winding parts corresponding to all the individual electron guns are integrated by the magnetic material core has been described, but as the deflecting device, for example, for each column. It may have a divided multiple column structure.

In the above embodiment, the magnetic material core is combined with the ferrite plate.
As the magnetic material core, for example, a laminated plate or a material obtained by impregnating a resin or the like with ferrite can also be used.

In addition, in the above-mentioned embodiment, the polyurethane copper wire is directly wound around the magnetic material core to form the individual winding portion. However, the individual winding portion is made of polyurethane via an electrically insulating material such as a bobbin. A copper wire may be wound, and the winding method may be toroidal winding around a magnetic material core, saddle winding around a saddle shape, or a combination of both.

Further, in the above embodiment, the case where the centering magnet is used for adjusting the center axis of the electron beam and the center of the deflection magnetic field has been described, but this correction may be made electrically. Further, when the individual electron gun is fixed with extremely high accuracy, the correction means can be omitted.

Furthermore, the above embodiment has one
Although the monochrome picture tube in which the individual electron guns that emit the electron beams of the book are arranged has been described, the present invention has a color picture tube in which the electron guns that emit the three electron beams are arranged, and a single picture tube emitted from the electron gun. The present invention can also be applied to a color picture tube of a system in which the electron beam of 3 is equivalently converted to 3 electron beam by electromagnetic or electrostatic deflection.

[0033]

EFFECTS OF THE INVENTION A plurality of individual electron guns, a phosphor screen which is divided into a plurality of display areas and is scanned by electron beams emitted from each of the individual electron guns, and a plurality of individual electron guns are emitted. In a picture tube device having a deflecting device for deflecting an electron beam, the deflecting device includes a plurality of individual winding parts arranged corresponding to each individual electron gun, and a magnetic material core connecting the individual winding parts. With the structure having, it is not necessary to specifically adjust the deflecting device when it is attached to the picture tube, and the adjustment of the deflecting device with respect to the picture tube can be made extremely simple. Further, the center axis of the electron beam, the center of the deflection magnetic field, and the center of the divided screen can be accurately matched. In addition, the deflection distortion of each screen can be generated symmetrically in each adjacent screen, the correction of the deflection distortion is simplified, and a continuous screen can be displayed between the adjacent scanning areas, which is highly practical. A picture tube can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a picture tube which is an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of the picture tube.

FIG. 3 is a perspective view showing the structure of the deflecting device.

[Explanation of symbols]

 1 ... Face plate 2 ... Side wall 3 ... Rear plate 4 ... Funnel 5 ... Phosphor screen 6 ... Neck 7 ... Individual electron gun 8 ... Support means 10 ... Deflection device 11 ... Magnetic material core 12H ... Horizontal deflection coil 12V ... Vertical deflection coil 13 ... Individual winding part

Claims (2)

[Claims] 1. A plurality of individual electron guns, a phosphor screen which is divided into a plurality of display regions and scanned by electron beams emitted from each of the individual electron guns, and a plurality of individual electron guns. In the picture tube device having a deflecting device for deflecting an electron beam, the deflecting device comprises a plurality of individual winding parts arranged corresponding to each of the individual electron guns, and a magnetic field connecting the individual winding parts. A picture tube device having a material core. 2. The picture tube device according to claim 1, wherein the magnetic material core has a cross beam shape.