JPH08227279A - Picture tube device - Google Patents

Abstract

PURPOSE: To make joints of divided images displayed on respective areas inconspicuous in a picture tube device dividing and scanning a phosphor screen to plural areas. CONSTITUTION: This device is provided with the phosphor screen 17 of an integrated structure and plural electronic guns 19, and in the picture tube device deflecting electronic beams emitted from respective electronic guns in the first and second directions, scanning the phosphor screen divided to plural areas R1-R15, linking the divided images displayed on respective areas and obtaining a synthesis image, the joint parts of the images on plural pieces of small areas continuing in the scanning direction of the later one between the first direction scan and the second direction scan are set obliquely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a picture tube apparatus, and more particularly to a picture tube apparatus in which a screen portion is divided into a plurality of small areas for scanning.

[0002]

2. Description of the Related Art Conventionally, a method of arranging a plurality of independent small picture tubes to obtain a high resolution large screen is disclosed in Japanese Patent Laid-Open No. 48-9.
No. 0428, Japanese Unexamined Patent Publication No. 49-21019, and Japanese Utility Model Laid-Open No. 53-117130. This kind of method is effective for displaying a large image with a large number of divisions arranged outdoors, but when displaying a medium-sized large image with a screen size of about 40 inches, it is drawn in each area. The seams of the divided images are conspicuous, and an unpleasant image is played back. Therefore, when used as a home television receiver or as a terminal for graphic display in computer-aided design (CAD), the seam of the image becomes a fatal defect.

In contrast, US Pat. No. 3,071,7
The specification No. 06, Japanese Utility Model Publication No. 39-25641, Japanese Patent Publication No. 42-4928, Japanese Patent Publication No. 50-17167 and the like have an image receiving structure in which a plurality of independent cathode ray tube phosphor cleans are integrated. A tube device is disclosed. In this picture tube device, as shown in FIG. 11, a phosphor screen 1 having an integrated structure formed on the inner surface of a face plate is irradiated with electron beams emitted from a plurality of electron guns to form a plurality of regions R1 in horizontal and vertical directions. The divided images are displayed in the respective areas by scanning by dividing the divided image into .about.R9, and the divided images are connected to obtain one combined image.

In the picture tube device having such a structure, in order to display a good composite image on the phosphor screen 1, the horizontal scanning lines of the adjacent areas are aligned, and at the same time, each area R1.
It is necessary to eliminate the seam of the divided images drawn at ~ R9. However, the electron beams scanning the regions R1 to R9 are subject to deflection aberrations due to the magnetic fields generated by the deflecting devices, so the divided images drawn in the regions R1 to R9 are
Particularly, in the peripheral portion of each of the regions R1 to R9, deflection distortion such as raster distortion or non-linearity is provided. Therefore, if the divided images are simply displayed in each of the areas R1 to R9, the horizontal scanning lines 2 in the adjacent areas do not coincide with each other, and the joints of the divided images become conspicuous.

Of the areas adjacent to each other in the horizontal direction, all the horizontal scanning lines 2 can be relatively easily matched by matching the raster distortion and the linearity of the horizontal scanning lines 2. Further, by adjusting the calling of the video signal from the field memory or the frame memory, it is possible to easily connect the divided images of the adjacent regions. However, it is extremely difficult to make the horizontal scanning lines 2 at the boundary between the adjacent regions in the vertical direction completely parallel. Further, even if the scanning line spacing becomes coarse or dense at the boundary portion due to distortion, it is difficult to eliminate the coarseness and fineness of the scanning line spacing, and the seams of the divided images become conspicuous.

[0006]

As described above, the cathode ray tube device for dividing the fluorescent substance clean of the integrated structure into a plurality of regions by the electron beams emitted from the plurality of electron guns and scanning the divided regions is provided. It is necessary to align the horizontal scanning lines and eliminate the seams of the divided images drawn in each area at the same time.However, the electron beam scanning each area is subject to deflection aberration by the magnetic field generated by the deflecting device, and each area is affected. Since the divided images drawn have deflection distortion such as raster distortion and non-linearity in the peripheral part of each area, the horizontal scanning lines in the adjacent areas do not match and the joints of the divided images become noticeable. . Among these, in the horizontally adjacent regions, the horizontal scanning lines can be relatively easily matched by matching the raster distortion and the linearity of the scanning lines. Further, by adjusting the calling of the video signal from the field memory or the frame memory, it is possible to easily connect the divided images of the adjacent regions. However, for adjacent areas in the vertical direction, it is extremely difficult to make the horizontal scanning lines at the boundaries completely parallel, and even if the intervals between the scanning lines become rough or dense at the boundaries. , It is difficult to eliminate the density of the scanning line intervals,
There is a problem that the seams of the divided images become noticeable.

The present invention has been made in order to solve the above-mentioned problems, and in a picture tube device which divides and scans a phosphor clean having an integrated structure into a plurality of areas, the divided images drawn in the respective areas. It is an object of the present invention to configure a picture tube device in which the seams of (1) and (3) are inconspicuous and a composite image without a feeling of strangeness can be obtained.

[0008]

According to the present invention, at least a screen portion and a plurality of electron gun portions are provided, the electron gun portion is separately arranged into a plurality of small electron gun portions, and the screen portion is formed from the small electron gun portions. Of the cathode ray tube device which is divided into a plurality of small regions by deflecting the electron beam in the first direction and the second direction, respectively. The seams of the images of a plurality of small areas continuous in the slower scanning direction of the scanning are set obliquely.

In the normal scanning, the vertical scanning is slower than the horizontal scanning. Therefore, by obliquely setting the seam of the upper and lower two regions arranged in the vertical direction, the scanning line of the seam is as if in the horizontal direction. A plurality of scanning lines are connected in the horizontal direction like a joint between two left and right areas that are arranged. Since it is extremely easy to connect the scanning lines in the horizontal direction, the joint between the upper and lower regions can be made unnoticeable at all.
Further, when the image receiving device is a color image receiving device, there is a landing allowance because the striped phosphor and the striped non-light emitting part are provided on the screen. It is a great advantage to convert to directional seams. If the horizontal scanning and the vertical scanning are reversed, the horizontal scanning becomes slower than the vertical scanning. Therefore, the joint portion of the two left and right regions continuous in the horizontal direction is set obliquely.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described based on embodiments with reference to the drawings. FIG. 1 shows a picture tube device as one embodiment of the invention. This picture tube device includes a flat glass face plate 10 having a substantially rectangular shape, and a side wall 1 that is joined to a peripheral portion of the face plate 10 substantially vertically.
1, a rear plate 13 joined in parallel to the face plate 10 through the side wall 11, and a plurality of funnels 15 joined around a plurality of openings 14 formed in the rear plate 13. It has a vacuum envelope. In the illustrated example, the rear plate 13 has five horizontally,
A total of 15 openings 14 are formed in the vertical direction, and 15 funnels 15 are joined around each of the openings 14.

On the inner surface of the face plate 10, a phosphor screen 17 made of a monochromatic phosphor is provided as an integral structure. Also, each neck 18 of a plurality of funnels 15
Inside, a plurality of electron guns 19 that emit a single electron beam are sealed. In addition, between the face plate 10 and the rear plate 13, a plurality of support columns 20 that support the atmospheric pressure load applied to the face plate 10 and the rear plate 13 are provided. Further, a deflection device 21 is attached to the outside of each funnel 15.

In this picture tube device, a single electron beam emitted from each electron gun 19 is horizontally and vertically deflected by a magnetic field generated by a deflecting device 21 mounted outside each funnel 15. The phosphor screen 17 is divided into a plurality of areas, in the illustrated example, five areas in the horizontal direction and three areas in the vertical direction, a total of 15 areas R1 to R15, which are scanned as described later. Region R1 to R
The images (divided images) drawn in 15 are connected without breaks or overlaps to display one combined image on the phosphor screen 17. The aspect ratio of the screen on which the composite image is displayed is a rectangle of 4: 3 or 16: 9. The divisional scanning of each of the regions R1 to R15 may be simultaneous or time divisional.

In the drawing, the boundaries of the respective regions R1 to R15 are shown by broken lines, but these broken lines are actually the phosphor screen 17
It does not exist above, nor does it exist in one combined image displayed on the phosphor screen 17 by the divided images drawn in the respective regions R1 to R15. Particularly in this picture tube device, each region R1 shown by the broken line
A region R in which the boundary of ~ R15 is adjacent in the horizontal direction (X direction)
The boundaries of 1 to R15 are straight lines in the vertical direction (Y direction), but the boundaries of the regions R1 to R15 adjacent in the vertical direction are inclined with respect to the horizontal direction. Particularly in the illustrated example, the regions R1, R6, R11, the regions R3, R8,
The boundary between R13 and the regions R5, R10 and R15 is lowering to the right, and the boundary between the regions R2, R7 and R12 and the regions R4, R9 and R14 is rising to the right.

Next, the scanning of each of the above areas will be described with reference to FIG. FIG. 2 shows the region R7, and the electron beam 23 emitted from the electron gun 19 is
The range shown by the alternate long and short dash lines 26 and 27 outside the region R7 shown by the broken lines 24 and 25 is deflected by the magnetic field generated by the deflecting device 21 that is attached to the outside of the funnel 15 that is sealed by the electron gun 19. Overscan in the horizontal and vertical directions. That is, the electron beam 23 for scanning the region R7
Are regions R1, R2, R3, R6 surrounding the region R7,
The adjacent portion of R8, R11, R12, and R13 is overscanned. Such overscanning results in regions R1, R2, and R2 surrounding region R7.
The electron beam scanning R3, R6, R8, R11, R12, and R13 is also performed, and the peripheral portion of the region R7 is
These regions R1, R2, R3, R6, R8, R11, R1
2, R13 is scanned by an electron beam that overscans (this scanning portion is not shown).

In this case, the input of the video signal to the electron gun 19 for drawing the divided image in the area R7 is performed by the driving circuit so that the image is drawn only in the area R7 indicated by the broken lines 24 and 25. It is performed in synchronization with the deflection of. Similar means may be applied to regions R1, R2, R3, R6 surrounding region R7,
The same applies to R8, R11, R12 and R13. As a result, the divided images drawn in the region R7 are divided into regions R1, R2, R3, R6, R8, R11, R12, R surrounding the region R7.
It is connected to the divided image drawn in 13 horizontally and vertically without any breaks or overlaps.

In particular, the seams of the divided images drawn in the vertically adjacent areas will be described. As shown in FIG. 3A, the area R2 is located above the area R7, and in FIG. 3B, the area R7. , The horizontal scanning lines 31s1, 31s2, 31s3 ... 31s (n-3), 31s from the upper end 29 side to the lower end 30 of the region R2.
Draw (n-2), 31s (n-1). These horizontal scan lines 31s
1, 31s2, 31s3 ... 31s (n-3), 31s (n-2), 31s (n
-1) overscans the upper, lower, left and right sides of the region R2 as indicated by the broken line.

After over-scanning the outside of the upper end 29 of the region R2 with a plurality of horizontal scanning lines, the electron beam eventually comes to the region R.
2 is scanned and the fluorescent substance in this region R2 is caused to emit light. In this case, the upper end 29 of the region R2 is a substantially horizontal straight line, and the overscan portion outside the upper end 29 is covered with a non-luminous substance such as graphite.
It does not emit light when scanned with an electron beam.

On the other hand, with respect to the overscanning portions on the left and right sides of the region R2, when the scanning is performed while the image signal is being input to the electron gun, the phosphors in the adjacent regions R1 and R3 are caused to emit light.
Therefore, when scanning this part, the drive circuit controls the input of the video signal to the electron gun to set it in the cut-off state to prevent the phosphors in the regions R1 and R3 adjacent to the left and right of the region R2 from emitting light.

Further, when the scanning of the region R2 proceeds from the upper end 29 to the lower end 30 and reaches the lower end 30 which is inclined with respect to the horizontal direction which is the boundary with the region R7, the input of the video signal to the electron gun is controlled. In the cut-off state, the phosphor in the region R7 is prevented from emitting light. That is, in FIG. 3A, the horizontal scanning line 31s (n-3) has a point o on the boundary with the region R1.
Input the video signal at 3, stop the input of the video signal at the point p3 on the boundary, and input the video signal at the point o2 on the boundary with the region R1 for the next horizontal scanning line 31s (n-2). Then, the input of the video signal is stopped at the point p2 on the boundary, and the next horizontal scanning line 3
For 1s (n-1), the video signal is input at the point o1 on the boundary with the region R1, the video signal is stopped at the point p1 on the boundary, and the same applies to the phosphor emission in the region R7. Is being prevented.

On the other hand, as for the region R7, as shown in FIG. 3B, the region R7 is overscanned vertically and horizontally as in the region R2, and the region R7 is horizontally scanned from the upper end 32 side to the lower end 33 direction. Lines 34s1, 34s2, 34s3, 34s4 ... 31s (n-
3), 34s (n-2), 34s (n-1) are drawn. Also in the scanning of the region R7, the overscan portion controls the input of the image signal to the electron gun by the drive circuit to set the cutoff state to prevent the phosphors in the vertically adjacent regions and the left and right regions from emitting light.

That is, for the horizontal scanning line 34s1 that overscans the upper end 32 side of the region R7, the region R2 is scanned,
The input of the video signal to the electron gun is controlled to a cut-off state to prevent the phosphor in the region R2 from emitting light. Regarding the next horizontal scanning line 34s2, while scanning the region R2, the video signal is controlled to be in the cutoff state, and the point q2 on the upper end 32 which is the boundary with the region R2 inclined with respect to the horizontal direction.
Then, the image signal is input to cause the phosphor in the region R7 to emit light, and the input of the image signal is controlled at a point r2 on the boundary with the region R8 to set a cutoff state to prevent the emission of the phosphor in the region R8. For the next horizontal scanning line 34s3, the video signal is input at a point q3 on the boundary with the region R2, and the input of the video signal is controlled at a point r3 on the boundary with the region R8 to make a cut-off state. Regarding the line 34s4, the video signal is input at a point q4 on the boundary with the region R2, and the input of the video signal is controlled at a point r4 on the boundary with the region R8 to make a cut-off state. Light is emitted to prevent the phosphor in the adjacent region from emitting light.

Therefore, the regions R adjacent to each other in the vertical direction
2 and R7 are scanned simultaneously or in a time-sharing manner, as shown in FIG.
As shown in, the point p4 on the boundary between the region R2 and the region R7
, P3, p2, p1 and the points q4, q3, q2 on the boundary between the region R2 and the region R2, the horizontal scanning lines 31s (n-3), 31s (n-2) of the region R2, 31s (n-1) and area R
7 horizontal scanning lines 34s2, 34s3, 34s4 are defined as regions R2, R
It can be perfectly continuous at the seven boundaries. In this way, the horizontal scanning line 31s that passes through the boundary between both regions R2 and R7
(n-3), 31s (n-2), 31s (n-1), 34s2, 34s3, 3
Since 4s4 is continuous, its boundary is inclined with respect to the horizontal direction, so that it can be relatively easily performed as in the case of aligning the horizontal scanning lines of the horizontally adjacent regions.

As a result, even if the divided images drawn in these regions R2 and R7 have deflection distortion, these regions R2 and R7
It is possible to make the seams of the divided images drawn in (3) inconspicuous. That is, in the conventional cathode-ray tube device, even if horizontal scanning lines having a slight deflection distortion are adjacent between vertically adjacent areas, as shown in FIG.
Double distortion was observed, and the seams of the divided images drawn in both areas became noticeable. For example, the region R shown in FIG.
Assuming that each horizontal scanning line at the boundary of 1 and R6 has a deflection distortion of 1%, a space (interval) approximately twice the normal horizontal scanning line interval is created between these horizontal scanning lines, and The seams become noticeable. However, as described above, the horizontal scanning line 31s (n- which passes through the boundary between the two regions R2 and R7
3), 31s (n-2), 31s (n-1), 34s2, 34s3, 34s4
If there are deflection distortions in the divided images drawn in both regions R2 and R7, they will not be observed in an enlarged manner and the joints of the divided images can be made inconspicuous. In some cases, the intervals between the horizontal scanning lines are not constant, but in such a case, in the conventional picture tube device, due to the difference in linearity, the seams of the divided images drawn in both areas became conspicuous. In the picture tube device of this example,
Even in such a case, the seams of the divided images drawn in both areas become inconspicuous.

The relationship between the horizontal scanning lines for scanning the regions R2 and R7 is also applied to other vertically adjacent regions. That is, of the regions R1 to R15 shown in FIG. 1A, the region R4 having the same upper right slope as the regions R2 and R7.
, R9, R12, and R14, as well as the regions R1, R3, R5, R6, and R, which have a slope to the right opposite to those of the regions R2 and R7.
Also for 8, R10, R11, R13, and R15, it is possible to make the seams of the divided images inconspicuous at the boundary between the vertically adjacent regions.

In the above embodiment, the boundary between the vertically adjacent regions has a zigzag pattern including a pattern inclined to the upper right and a pattern inclined to the lower right with respect to the horizontal direction. As shown in (a), the boundaries between the regions R1 to R15 adjacent in the vertical direction may all have a sawtooth shape that is inclined downward to the right or inclined toward the upper right with respect to the horizontal direction. Further, as shown in (b) of FIG.
The boundary between 1 and R6 descends to the right, the boundary between regions R6 and R11 moves to the upper right, the boundary between regions R2 and R7 moves to the upper right, and regions R7 and R12
Alternatively, a zigzag pattern may be used in which the boundary of the arrow descends to the right and is similarly inclined. Further, as shown in (c), for example, the boundary between the regions R1 and R6 goes up to the right, the boundary between the regions R6 and R11 goes down to the right, the boundary between the regions R2 and R7 goes up to the right, and the region R7.
The boundary between R12 and R12 may also be a pattern that descends to the right and inclines in the same manner, or may be a combination of these patterns.

Further, in the above-mentioned embodiment, the phosphor screens having an integral structure are arranged in the horizontal direction, five in the horizontal direction and three in the vertical direction, for a total of 15 screens.
I explained the case of scanning by dividing it into individual areas,
The divisional scanning of the phosphor screen is not limited to the case of the above embodiment, and can be appropriately changed according to the size of the phosphor screen.

Further, in the above-described embodiment, the areas which are divided and scanned by the electron beams emitted from the plurality of electron guns are overscanned, and the overscanned portions are driven by the drive circuit to the image signals to the electron guns. By controlling the input of to the cutoff state, the emission of the fluorescent substance in the adjacent region in the overscan portion was prevented, but instead of controlling the input of the video signal to this electron gun to set the cutoff state, , Fig. 5
As shown in FIG. 7, a shield 37 is arranged at a position in the envelope corresponding to the overscan portion of each region so as to shield the electron beam 231 that is overdeflected to scan the overscan portion. Good. Such shields 37 are formed in a matrix as shown in FIG. 6, and in particular, by inclining portions 38 corresponding to vertically adjacent regions with respect to the horizontal direction, a video signal is transmitted to the electron gun 19. Even when over-scanning while inputting, it is possible to prevent the phosphors from emitting light in the adjacent region in the over-scanning portion, and in the same manner as in the above embodiment, the horizontal scanning lines at the boundaries of the vertically adjacent regions are made continuous. ,
It is possible to make the seams of the divided images drawn in each region inconspicuous.

The shielding of the overscan portion by such a shield is fixed to the rear plate 13 as shown in FIG. 7, and the tip portion of the phosphor screen 17 is provided on the face plate 10 in a plurality of regions. Shield 37 in contact with the boundary
But you can do it too.

Further, in the above embodiment, the picture tube device provided with the phosphor screen made of the monochromatic phosphor has been described. However, in the present invention, the phosphor screen is composed of a three-color phosphor layer which emits blue, green and red light. In addition, the phosphor screen is provided with an index signal generating phosphor layer for generating an index signal, and an index signal obtained from the index signal generating phosphor layer is picked up to emit a plurality of electron guns. It can also be applied to an index type color picture tube device in which the phosphor screen is divided into a plurality of regions and scanned by a single electron beam.

Next, another embodiment will be described. The picture tube device shown in FIGS. 8 and 9 is a color picture tube device, has a vacuum envelope similar to that of the picture tube device shown in FIG. 1, and has blue, green, red on the inner surface of its face plate 10. Black stripe fluorescent light composed of a striped three-color phosphor layer which is elongated in the vertical direction (Y-axis direction) and emits light in the vertical direction, and a vertically elongated striped light absorption layer which is also formed between the three-color phosphor layers. A body screen 17 is provided, a shadow mask 40 described below is arranged inside the body screen 17 so as to face the phosphor screen 17, and is supported by a plurality of mask erection means 41 fixed to the rear plate 13.
Since the other configurations are almost the same as those of the picture tube device shown in FIG. 1, the same symbols are given to the same portions and the description thereof will be omitted.

This color picture tube device switches the color of single electron beams emitted from a plurality of electron guns 19 sealed in each neck 18 of a plurality of funnels 15, and the color-switched electrons are switched. Beam each funnel 15
The fluorescent screen 17 is deflected in the horizontal and vertical directions by the magnetic field generated by the deflection device 21 mounted on the outside of the phosphor screen 17.
Regions separated by broken lines, in the illustrated example, five regions in the horizontal direction and three regions in the vertical direction, a total of 15 regions R1 to R.
Each area R1 ...
Connect the divided images drawn on R15 without breaks or overlaps,
One composite color image is displayed on the phosphor screen 17. Regarding the boundaries (broken lines) of the areas R1 to R15 with the adjacent areas, the boundaries of the areas adjacent in the horizontal direction are straight lines in the vertical direction, but the boundaries of the areas adjacent in the vertical direction are relative to the horizontal direction. It is inclined.

The color change of the single electron beam emitted from the electron gun 19 may be carried out for each horizontal scanning as shown in Japanese Patent Application No. 61-10000. In this case, if the vertical deflection frequency of each divided area is set to 60 Hz, the flicker of divided images drawn in each divided area can be eliminated.

The shadow mask 40 has the region R1.
A plurality of divided mask pieces arranged in parallel in the horizontal direction corresponding to the horizontal division of .about.R15, in the illustrated example, five divided mask pieces 42a to 42 corresponding to five divided areas in the horizontal direction.
consists of e. In each of the divided mask pieces 42a to 42e,
A plurality of slit-shaped electron beam passage holes are arranged in a straight line through bridges in a vertical direction corresponding to each of three vertically adjacent regions, and the vertical electron beam passage holes are arranged in the horizontal direction. Each of the three effective portions 43 formed in parallel with each other is provided via the ineffective portion 44 in which the electron beam passage hole is not formed. The non-effective portion 44 is inclined with respect to the horizontal direction, corresponding to the boundary between the vertically adjacent regions. When the shadow mask 40 is composed of the divided mask pieces 42a to 42e arranged in parallel in the horizontal direction as described above, the divided mask pieces 42a to 4e are collided by the electron beams.
Even if 2e is heated, the heat of the heated divided mask pieces is not transferred to the horizontally adjacent divided mask pieces.
On the other hand, even if the divided mask pieces 42a to 42e are thermally expanded in the vertical direction, the three-color phosphor layers of the phosphor screen 17 are vertically long and narrow stripes, so that there is no problem, and the divided mask pieces 42a to 42e are not affected. Purity drift due to thermal expansion can be prevented.

When the color picture tube device is constructed in this manner, the divided mask pieces 42a to 42 of the shadow mask 40 are formed.
The ineffective portion 44 interposed between the effective portions 43 of e serves as a shielding portion that shields the overscan portion of the regions R1 to R15 which are divided and scanned by the single electron beam emitted from each electron gun 19,
Unlike the picture tube device shown in FIG. 5, the seams of the divided color images drawn in the vertically adjacent regions can be made inconspicuous without providing a special shield. Further, in this case, even if an error occurs in the interval (q value) between the phosphor screen 17 and the shadow mask 40, is it a shadow of the bridge between the electron beam passage holes of the shadow mask 40 at the joint of the divided color images? It also has the effect of looking like.

Display of divided color images in a plurality of areas of such a color picture tube device is performed by a line sequential method,
Any of the frame sequential methods may be used. Further, the horizontal and vertical scanning in this case may be performed by forward / backward scanning or reciprocal scanning.

In the above embodiment, the color picture tube device has been described in which the single electron beams emitted from the plurality of electron guns are color-switched and the phosphor screen is divided into a plurality of regions and scanned. According to the present invention, when a plurality of electron guns are electron guns that respectively emit three electron beams, and the phosphor screen is divided into a plurality of regions and scanned by the three electron beams emitted from each electron gun. Can also be applied.

Further, in the above embodiment, the shadow mask is composed of a plurality of divided mask pieces arranged in parallel in the horizontal direction, but the shadow mask is not limited to such a shadow mask.

Further, in the above-described embodiments, the scanning of each small area is such that the first direction is horizontal and the second direction is vertical, but the present invention is not limited to this, and the first direction is vertical. The present invention can also be applied to the case where scanning is performed with the second direction horizontal, and in this case, the portions of the rasters that are continuous left and right may be set diagonally as shown in FIG.

[0039]

The phosphor screen and the plurality of electron guns having an integral structure are provided, and the electron beam emitted from each electron gun is deflected in the first and second directions to divide the phosphor screen into a plurality of regions. In a picture tube device that obtains a composite image by connecting divided images drawn in respective regions by this scanning, a slower scanning direction of the scanning in the first direction and the scanning in the second direction, for example, the vertical direction. If the seams of the divided images drawn in the areas adjacent to are set diagonally, multiple scan lines will be created at the boundaries of the vertically adjacent areas as well as the divided images displayed in the horizontally adjacent areas. The scanning lines can be made to pass through, and the scanning lines can be connected to each other in the horizontal direction relatively easily as in the case of the horizontally adjacent regions. As a result, the seams of the divided images drawn in the vertically adjacent regions can be made inconspicuous, and a synthesized image with no discomfort can be obtained. Particularly in the case of a color picture tube device, the stripe-shaped light absorbing layer forming the phosphor screen provides a landing margin of the electron beam with respect to the phosphor layer, so that the vertical seam is changed to the horizontal seam as described above. There is an advantage that the effect of converting into the

[Brief description of drawings]

FIG. 1 (a) is a perspective view showing a configuration of a picture tube device according to an embodiment of the present invention, and FIG. 1 (b) is a sectional view taken along line BB thereof.

FIG. 2 (a) is a plan view of one area shown for explaining a scanning method of a plurality of divided and scanned areas of the picture tube device, and FIG. 2 (b) is a picture tube in that area. A horizontal sectional view of the apparatus, and FIG. 2C is a vertical sectional view of the same.

3 (a) to 3 (c) are diagrams for explaining scanning at a boundary between vertically adjacent regions of the picture tube device.

FIG. 4A to FIG. 4C are diagrams showing different divisions of a plurality of areas which are divided and scanned.

FIG. 5 is a diagram showing a main part configuration of a picture tube device in which a shield that shields an electron beam that overscans a plurality of areas that are divided and scanned is arranged.

FIG. 6 is a plan view showing the structure of the shield.

FIG. 7 is a diagram showing a main configuration of a picture tube device in which shields having different structures are arranged.

FIG. 8 is a sectional view showing the configuration of a color picture tube device which is another embodiment of the present invention.

FIG. 9 is an exploded perspective view showing a configuration of the color picture tube device.

FIG. 10 is a perspective view showing the configuration of a picture tube device that is another embodiment of the present invention.

FIG. 11 is a diagram for explaining a problem of a conventional picture tube device that similarly scans by dividing into a plurality of areas.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Face plate 11 ... Side wall 13 ... Rear plate 15 ... Funnel 17 ... Phosphor screen 19 ... Electron gun 21 ... Deflection device 23 ... Electron beam 31s1 to 31s (n-1) ... Horizontal scanning line 34s1 to 34s (n-1) ) ... horizontal scanning line 37 ... shielding body 40 ... shadow masks 42a, 42b, 42c, 42d, 42e ... split mask pieces R1 to R15 ... regions

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04N 5/68 H04N 5/68 Z

Claims (1)

[Claims] 1. At least a screen section and a plurality of electron gun sections are provided, the electron gun section is separately arranged into a plurality of small electron gun sections, and the screen section respectively receives electron beams from the small electron gun sections. In a picture tube device that is divided into a plurality of small areas by being deflected in a first direction and a second direction, the picture tube device is divided into a plurality of small areas and the slower scanning direction of the first direction scanning and the second direction scanning is performed. A picture tube device, wherein a seam portion of images of a plurality of small areas continuous with each other is obliquely set.