JPH06338271A - Color picture tube device - Google Patents

Abstract

PURPOSE:To provide a color picture tube device in which flickering of a reproduced image is eliminated, and which has no reduction of brightness or color phase abnormality. CONSTITUTION:Plural electron guns 14 to emit a single electron beam are disposed separately, the single electron beam emitted from each electron gun is deflected by deflection devices 15, 16 in plural stages, and a phosphor screen 8 is separated to plural ranges R1-R15 to be separately scanned by each electron beam. The number of the plural ranges to be separately scanned by the electron beams is set to be a multiple of 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color picture tube apparatus, and more particularly to a color picture tube apparatus which divides a phosphor screen into a plurality of regions and divides and scans them.

[0002]

2. Description of the Related Art In recent years, various studies have been made on high-definition broadcasting or a high-resolution picture tube having a large screen accompanying the broadcasting. 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 achieve 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 means for arranging a plurality of independent small-sized picture tube devices to obtain a high-resolution large screen has been disclosed in Japanese Patent Laid-Open Nos. 48-90428 and 49-21019.
It is disclosed in, for example, Japanese Utility Model Publication No. 53-117130. This kind of method is effective for displaying a huge screen with a large number of divisions arranged outdoors, but the screen size is 4
In the case of a medium-scale large screen display of about 0 inch, the connection portion of the screen between the areas is conspicuous, and an unpleasant image is reproduced. Therefore, when used as a home television receiver or as a terminal for graphic display in computer-aided design (CAD), the connection portion of the screen becomes a fatal defect.

In contrast, US Pat. No. 3,071,7
In the specification No. 06, Japanese Utility Model Publication No. 39-25641, Japanese Patent Publication No. 42-4928, and Japanese Patent Publication No. 50-17167, a multi-neck system in which a plurality of independent picture tube phosphor screens are integrated. The above picture tube device is disclosed.

The multi-neck type picture tube device having the phosphor screen of this integrated structure is different from the means for arranging a plurality of independent small picture tube devices to make a large screen.
There is no screen connection between the divided areas, and a screen that is fairly easy to see can be obtained. However, on the other hand, since the divided scan areas come close to each other, brightness, contrast,
Small differences such as hue become noticeable.

That is, in general, when an image is evaluated by human eyes, the absolute evaluation is difficult, but the relative evaluation is
It can be evaluated very sensitively. Therefore, for two images that are very close to each other, a slight difference in hue or the like can be discriminated sensitively. Therefore, when the divided scan areas are adjacent and adjacent to each other as described above, it is necessary to sufficiently match the brightness, contrast, hue, etc. of the adjacent areas, which complicates the adjustment and increases the number of adjustments. However, this is a big problem in practical use. This is a fatal problem of the multi-neck type picture tube device having the phosphor screen having an integrated structure.

On the other hand, in a picture tube device which divides and scans a phosphor screen having an integrated structure, in order to display a color image, a picture tube device of a shadow mask type in which color selection is performed by a shadow mask is changed to another system. Compared with the index method, color selection is simpler and more reliable, and there is no need to switch colors at an extremely high frequency.

However, in contrast to a picture tube apparatus which divides and scans an integrated structure phosphor screen, three electron guns are integrated in the neck like a color picture tube apparatus of a shadow mask system which is widely used at present. Place the 3 electron gun structure,
If an attempt is made to apply a method in which the three electron beams emitted from the electron gun assembly are selected by a shadow mask and are made incident on the three-color phosphor layer of the phosphor screen, the current emission of each electron gun is caused by this method in manufacturing. Since the characteristics (drive characteristics) vary, it is difficult to match the current emission characteristics of the multi-electron gun for dividing and scanning the integrated structure phosphor screen into a plurality of areas, and the brightness between the divided scan areas is In order to make the contrast and hue sufficiently match, a huge amount of adjustment is required, which is a practical problem.

As a color picture tube apparatus for solving such a problem, Japanese Patent Laid-Open No. 62-170137 discloses a multi-electron gun for dividing and scanning a phosphor screen having an integral structure into a plurality of regions. Are electron guns that respectively emit a single electron beam, and the single electron beams emitted from the respective electron guns are substantially three on the deflection center plane of the main deflection device arranged corresponding to each electron gun. It is shown that the color switching is performed by using the electron beam of.

However, in such a color picture tube device,
It is extremely difficult to reproduce a flicker-free color image from an image signal transmitted by the current broadcasting system. In addition, there is a possibility that the luminance may be significantly deteriorated due to the scanning method used when reproducing the image.

[0012]

As described above, in a color picture tube device which divides and scans a phosphor screen having an integrated structure into a plurality of areas, a multi-electron for dividing and scanning the phosphor screen is provided. Each of the guns is an electron gun that emits a single electron beam, and the single electron beam emitted from each of the electron guns is substantially three on the deflection center plane of the main deflection device arranged corresponding to each electron gun. There is proposed a method of performing color switching by using the above-mentioned electron beam. However, in this color picture tube device, it is extremely difficult to make the reproduced image on the phosphor screen flicker-free as in the current color picture tube, and the brightness is greatly deteriorated due to the scanning method during image reproduction. There is a problem that there is a possibility.

The present invention has been made in order to solve the above-mentioned problems, and a phosphor screen having an integrated structure is divided into a plurality of areas and dividedly scanned, and then divided into a plurality of areas and dividedly scanned. In a color picture tube device in which each multi-electron gun for emitting a single electron beam emits a single electron beam, an object is to reproduce an image without flicker on the phosphor screen and without deterioration in brightness. To do.

[0014]

An electron gun unit in which a plurality of electron guns for emitting a single electron beam are separately arranged, and a single electron which is arranged corresponding to each electron gun and is emitted from each electron gun. The deflector is composed of a plurality of deflectors for deflecting the beam in a plurality of stages, and each electron beam deflected by the plurality of deflectors is divided into a plurality of regions and dividedly scanned through a shadow mask. In the color picture tube device including the phosphor screen according to the present invention, the plurality of areas divided and scanned by each electron beam is set to a multiple of 3.

Further, an electron gun section in which a plurality of electron guns for emitting a single electron beam are separately arranged, and a plurality of single electron beams emitted from each electron gun are arranged corresponding to the respective electron guns. A deflecting unit including a plurality of deflecting devices for deflecting in stages, and the electron beams deflected by the plurality of deflecting devices are divided into a plurality of regions in horizontal and vertical directions through a shadow mask. In a color picture tube device provided with a phosphor screen to be scanned, the number of vertical regions to be divided and scanned by each electron beam is a multiple of 3.

[0016]

As described above, when the phosphor screen is divided into a plurality of areas by the single electron beam emitted from the plurality of electron guns separately arranged and divided and scanned, the brightness is improved and the color picture tube is improved. Although the depth of the device can be shortened and the resolution can be improved, if the plurality of areas is set to a multiple of 3, the flicker of the reproduced image is eliminated, and the brightness of the image and the hue are not abnormal. It can be a tube device. That is, in a color picture tube device that divides and scans the phosphor screen into a plurality of areas, the electron beam emitted from each electron gun is a single electron beam, so that the three-color video signal sent from the transmitting side is sent. 1 line is temporarily stored in a line memory, and a single electron beam emitted from each electron gun is used to scan three times for each three-color video signal to obtain one scan of a normal color picture tube. Play the image. Therefore, if the plurality of areas that are divided and scanned are multiples of 3, an image is reproduced by any one of the video signals of the three-color video signals in every area, and the luminance is not lowered. If the area to be divided and scanned is 3
If there is one more than a multiple of, this one area is
There is no video signal to play the image for a certain time,
The brightness of the entire phosphor screen is reduced. Further, when an image of any color is reproduced in this one area, the color balance of the entire phosphor screen is lost and the hue becomes uncomfortable.

Further, the vertical scanning frequency and the horizontal scanning frequency of each divided area can be adjusted to the vertical and horizontal scanning frequencies of the normal color picture tube by setting the vertical scanning area to be divided and scanned to be a multiple of 3. Therefore, the drive circuit of the color picture tube device can be designed and manufactured similarly to the drive circuit of the conventional color picture tube device.

[0018]

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

FIG. 1 shows a color picture tube device which is one embodiment of the present invention, and FIG. 2 shows the structure thereof in an exploded manner. This color picture tube device includes a substantially rectangular flat glass face plate 1, a side wall 2 that is joined to a peripheral portion of the face plate 1 and extends substantially perpendicularly to the face plate 1, A vacuum envelope including a substantially rectangular flat glass rear plate 3 which is joined to face plate 1 in parallel with each other via a side wall 2, and a plurality of funnels 4 which are joined to the rear plate 3. Have 5.
The plurality of funnels 4 are joined around a plurality of openings 6 formed in the rear plate 3, and in the illustrated example,
5 in the horizontal X direction at equal intervals, 3 in the vertical Y direction at equal intervals
A total of 15 funnels 4 are joined together.

On the inner surface of the face plate 1, blue,
A single phosphor screen 8 having an integrated structure is formed, which includes a stripe-shaped three-color phosphor layer that emits green and red light and a black stripe provided between the three-color phosphor layers. A shadow mask 9 is arranged inside the phosphor screen 8 so as to face the phosphor screen 8. In the shadow mask 9, a portion corresponding to a plurality of horizontally and vertically divided areas which are divided and scanned by an electron beam described later is an effective portion having a large number of electron beam passage holes, and is vertically arranged. Although connected, they are divided in the horizontal direction into a number corresponding to the number of divided areas in the horizontal direction (five in the illustrated example of five divided areas in the horizontal direction). Each of the divided shadow masks has a pair of U-shaped metal first mask erection members 10 fixed to both ends in the vertical direction of the rear plate 4 by frit glass.
A plurality of metal second mask erection members 11 fixed with tension applied to the inside of the first mask erection member 10 and vertically middle part of the rear plate 3 by a frit glass to form a phosphor. Lifted in the direction of the screen 8, and these first and second mask erection members 10, 1
1 holds the phosphor screen 8 at a predetermined interval with high precision.

When the shadow mask 9 is divided in the horizontal direction in this way, even if heat is generated due to the impact of the electron beam, the heat is not transmitted to the divided adjacent shadow masks.
It is possible to prevent the purity drift due to the thermal expansion of the shadow mask that occurs in the conventional color picture tube device. Although connected in the vertical direction, the three-color phosphor layer of the phosphor screen 8 is formed in a stripe shape that is long in the vertical direction, but is not affected by the thermal expansion of the shadow mask.

Inside the neck 13 of each funnel 4, an electron gun 14 for emitting a single electron beam is arranged. Further, on the outside of each funnel 4, a pre-deflection device 15 for generating a pre-deflection magnetic field for pre-deflecting the electron beam emitted from the electron gun 14 arranged in each neck 13 and the pre-deflection device 15 are provided. A main deflection device 16 is mounted which generates a main deflection magnetic field for further deflecting the pre-deflected electron beam.

A metal columnar support member (not shown) is arranged between the face plate 1 and the rear plate 3 to support the atmospheric pressure load applied to the flat face plate 1 and the rear plate 3. ing. This support member has a wedge-shaped tip portion that abuts on the phosphor screen 8, is arranged such that the length direction thereof coincides with the length direction of the black stripe of the phosphor screen 8, and penetrates the shadow mask 9. It is fixed to the rear plate 3 by frit glass.

In this color picture tube device, an electron beam emitted from an electron gun 14 arranged in each neck 13 of the funnel 4 is generated by a pre-deflection device 15 mounted outside the funnel 4. The shadow mask 9 is deflected in the horizontal direction by the preliminary deflection magnetic field and is deflected in the horizontal and vertical directions by the main deflection magnetic field generated by the main deflection device 16.
The phosphor screen 8 is divided into a plurality of areas corresponding to the electron gun 14 in the horizontal direction through the scanning and divided scanning. That is, in the illustrated example, scanning is performed by dividing into 15 regions R1, R2, ... R15 which are divided into 5 in the horizontal direction and 3 in the vertical direction.
The rasters drawn on the phosphor screen 8 by this divided scanning are connected by the signals applied to the electron gun 14 and the respective deflecting devices 15 and 16, and one large raster without a break is drawn on the entire surface of the phosphor screen 8.

Such a color picture tube device can be manufactured by the following method.

That is, in advance, the face plate 1
The phosphor screen 8 is formed on the inner surface of the. On the other hand, frit glass is coated and sintered with first and second mask erection members 10 and 11 at predetermined positions on the inner surface of the rear plate 3, and columnar support members for supporting an atmospheric pressure load applied to the face plate 1 and the rear plate 3. Fixed by.
While applying tension to the shadow mask 9 by the second mask erection member 11, the shadow mask 9 is moved to the first position.
Weld to the mask erection member 10. The electron gun 14 is sealed in the neck 13 of each funnel 4. The face plate 1 on which the phosphor screen 8 is formed, the rear plate 3 on which the pillar-shaped support member is fixed and the shadow mask 9 is installed, the funnel 4 and the side wall 2 in which the electron gun 14 is sealed are brought into a predetermined relationship. Positioning positioning,
These are joined together by frit glass. Then, it is manufactured by exhausting the envelope 5 assembled as one body.

As a method of manufacturing this color cathode ray tube device, in addition to the above, the funnel 4 may be joined to the rear plate 3 and then the electron gun 14 may be sealed in the neck 13 of the rear plate 3, or the side wall 2 may be formed beforehand. It may be joined to the face plate 1 or the rear plate 3, or after the first mask erection member 10 is fixed to the rear plate 3 and the shadow mask 9 is attached to the first mask erection member 10, the rear plate 3 is first 2 The mask can be manufactured by various other methods such as fixing the mask erection member 11 and applying tension to the shadow mask 9.

Here, as described above, an image obtained by dividing and scanning one phosphor screen 8 into a plurality of regions by the single electron beam emitted from each of the plurality of electron guns 14 is formed. To describe the reproduction in detail, in a normal color picture tube device, the electron gun is an electron gun that emits three electron beams, and the three electron beams emitted from one electron gun are directed to one point on the center of the phosphor screen. The three electron beams are horizontally and vertically deflected by one deflecting device (main deflecting device) so that the entire area of the phosphor screen is horizontally and vertically scanned. In the case of the NTSC system, for example, as shown in FIGS. 3 and 4, the horizontal deflection frequency fH0 is received on the image receiving side B (picture tube side) in response to the signal sent from the transmitting side A (camera side).
Is 15.75 kHz, vertical deflection frequency fV0 is 60 Hz
Then, 525 scanning lines 17 are drawn by interlacing (the number of scanning lines is 2S0 = 525). Actually, due to the blanking period and overscan, the number of scanning lines 17 on the phosphor screen 8 does not become 525, but for the sake of explanation, it is assumed that all 525 scanning lines appear.

In this case, the image reproduced by one vertical scanning is formed by 262.5 scanning lines 17 (the number of scanning lines S0 = 262.5) (field scanning) due to interlacing. Is formed in 1/60 seconds. That is, without considering the blanking period, one scanning line is scanned in the horizontal direction at a speed of 1/15750 seconds (line scanning), and this scanning line is vertically spaced at 1/60 seconds in 262. Draw five. This field scanning is performed twice to reproduce one complete image (frame scanning). Performing the field scan twice in this way is
This is to eliminate flicker.

In a general color picture tube device having an electron gun for emitting three electron beams, each of the three electron beams receives a video signal of blue, green and red, and each electron beam is color-selected by a shadow mask. The three-color phosphor layer of the phosphor screen is landed. Therefore, an image reproduced by one horizontal / vertical scan becomes a color image immediately.

However, in the case in which the electron gun 14 emits a single electron beam like the color picture tube device of this example, even if the shadow mask 9 has a color selecting function, at the same time 3
The color phosphor layer cannot be landed, and it is necessary to reproduce an image of any one of the three colors for a certain period of time and perform color switching sequentially to reproduce a color image. is there. In this case, as a period for reproducing any one of the color images, it is performed in a very short time for each arrangement order of the phosphor layers as in the index type color picture tube device, or for each horizontal scanning. It may be performed every vertical scanning (field scanning) or every two vertical scanning (frame scanning).

However, in order to perform signal switching for each arrangement order of the phosphor layers as in the index type color picture tube device, an extremely high frequency must be handled, and the index signal from the phosphor screen can be accurately transmitted to the video signal side. It is difficult to put it into practical use because there are problems such as having to feed back to. In addition, performing color switching for each field scan or frame scan requires not only a large-capacity memory element because the signals for the entire screen must be temporarily stored and placed, but also the color switching time is too long. There are problems such as flicker.

On the other hand, the above-mentioned JP-A-62-1
As shown in Japanese Patent No. 70137, if color switching is performed every horizontal scanning, the color switching becomes approximately the same as the horizontal deflection frequency, the load on the circuit is reduced, and the memory element is a simple element. It can be highly practical, such as good.

As described above, the electron gun is used as an electron gun for emitting a single electron beam, and a plurality of electron guns for emitting a single electron beam are used to form one phosphor screen having an integrated structure into a plurality of regions. When a color image is reproduced by dividing and scanning separately, the signal for one horizontal scan (one line) sent from the transmitting side is first stored, and the signal for one line is horizontally stored. The number of divisions in the direction is divided (partially overlapping), and horizontal scanning of each area is performed at least three times. At this time, as shown in FIG. 5, the single electron beam 18 emitted from each electron gun 14 is pre-deflected in the horizontal direction by the pre-deflecting device 15 before passing through the deflection center plane of the main deflecting device 16, and is deflected. If the positions 19B, 19G, and 19R of the electron beam 18 on the center plane are made different, color selection by the shadow mask 9 becomes possible, and the switching of the blue, green, and red image signals can be performed in synchronization with the pre-deflection. By doing so, it becomes possible to reproduce a color image on the phosphor screen 8.

In this case, as shown in FIG. 6, the pre-deflection is slightly performed in the vertical direction, and the horizontal scanning lines 17B and 17 are rotated three times.
G and 17R are aligned as shown by arrow 21 to form one horizontal scanning line. That is, the vertical convergence is obtained (Δl = 0). In the horizontal direction, the convergence is adjusted by shifting the timing of calling the video signal.

Similarly, the color picture tube device of this example also uses the electron gun 14 as an electron gun for emitting a single electron beam 18, and each single electron beam 18 emitted from the plurality of electron guns 14.
Is pre-deflected in the horizontal direction by the pre-deflection device 15, and the positions 19B, 19G, 19R of the respective electron beams 18 on the deflection center plane of the main deflection device 16 are made different, and the electron beam 18 is selected by the shadow mask 9. Then, one phosphor screen 8 having an integrated structure is divided into a plurality of areas and divided and scanned, thereby reproducing a color image.

In this case, each of the divided areas scanned by the single electron beam 18 is reproducing an image of any one of blue, green and red for a certain period. Then, when the reproduction of the three-color image of blue, green, and red is completed, it becomes white, and the required color image based on this white is reproduced.
Therefore, it is necessary that the number of blue, green, and red images is the same in the images reproduced in each divided area in a certain period.

For example, as shown in FIG. 7, when divided into 15 regions R1 to R15, five regions R11 to R15 for reproducing a blue image and a region R6 for reproducing a green image for a certain period.
5 to R10, and 5 regions R1 to R5 for reproducing a red image, which are the same number, the image reproduced on the entire surface of the phosphor screen 8 has a basic white as a basic tone and a reproduced color. The image does not feel strange. That is, a plurality of electron beams 18 emitted from a plurality of electron guns 14 divides and scans one phosphor screen having an integrated structure into a plurality of regions, thereby performing a color scanning without a hue shift. In order to reproduce, it is necessary to set the number of divided areas to a multiple of 3. It should be noted that reproduction of each color image in this divided area does not need to be the same color in the horizontal direction as shown in FIG. 7, and may be the same color in the vertical direction, and blue, green, You may reproduce in order of red. However, when the number of divided areas is not a multiple of 3, the reproduced color images become unbalanced, and the hue of the color image reproduced on the entire surface of the phosphor screen becomes unnatural.

By making the number of divided areas scanned by each electron beam a multiple of 3 as described above, it is possible to eliminate the discomfort of the color image reproduced on the entire surface of the phosphor screen 8, but especially in the vertical direction. If the number of divided areas is set to a multiple of 3, the horizontal and vertical scanning frequency of each area can be set to the same frequency as that of a normal color picture tube or a very simple frequency so as not to cause flicker. .

For example, if the vertical scanning frequency fV1 of one divided area is set to be the same as the vertical deflection frequency fV0 sent from the transmitting side and fV1 = fV0 = 60 Hz, then each divided area R1 shown in FIG. Each of the field scans of ~ R15 ends in 1/60 seconds, and the field scan of the entire screen ends in 1/60 seconds. Therefore, the number S1 of horizontal scanning lines in each of the divided regions R1 to R15 is
Depending on the number NV of divided areas in the vertical direction, S1 = S0 / NV = 262.5 / 3 = 87.5.

Further, the horizontal scanning frequency fH1 for one area is blue,
Since each green and red image is switched three times, fH1 = S1 * 3 * fV0 = (S0 / NV) * 3 * fV0 = (S0 / fV0) * (3 * NV) = fH0 * (3 * NV) When the number of divided areas in the vertical direction is a multiple of 3, fH1 = fH0, and the horizontal scanning frequency fH1 is also 15.75 kHz, which is the same as the horizontal deflection frequency fH0 sent from the transmitting side.

Since the horizontal scanning frequency fH1 and the vertical scanning frequency fV1 of each of the areas thus divided can be set to be the same as the horizontal deflection frequency fH0 and the vertical deflection frequency fV0 sent from the transmitting side, the current color image The same drive circuit as the tube device can be used, the drive circuit design,
Easy and easy to manufacture.

Even if the number of divided areas in the vertical direction is other than 3, if it is 3 or more, (3 / N V) <1 from the above equation, and the horizontal scanning frequency fH1 of each divided area is 1
Since it is smaller than 5.75 kHz, the design and manufacture of the drive circuit are easier than in the case of high frequency. In particular, if the number of divided areas in the vertical direction is a multiple of 3, the horizontal scanning frequency fH1 of each area is 1/2 or 1/3 of 15.75 kHz.
Therefore, the design and manufacture of the drive circuit becomes easier.

In the above embodiment, the case where the number of divided areas scanned by each single electron beam emitted from a plurality of electron guns is 15 has been described as a specific example. However, the number of divisions in the horizontal and vertical directions changes depending on the size of the phosphor screen. The size of each area does not necessarily have to be the same.

Further, the color image can be reproduced by another method such that the signal from the transmitting side is stored in the memory element for each field scanning or frame scanning and the image of the same color is simultaneously reproduced in each divided area. .

Further, in the above embodiment, the face plate and the rear plate of the envelope are flat, and the supporting member is arranged inside the envelope to support the atmospheric pressure load of the flat face plate and the rear plate. Although the color picture tube apparatus described above has been described, the present invention can also be applied to a color picture tube apparatus in which the face plate has a curvature and a support member for supporting an atmospheric pressure load is unnecessary.

Further, the member for constructing the shadow mask may be one other than that in the above-mentioned embodiment, and the method for constructing the shadow mask may be another method such as the one for the side wall of the envelope.

In the above embodiment, the shadow mask is divided into a number corresponding to the number of divided areas in the horizontal direction. However, a shadow mask which is not divided can also be used.

Further, the phosphor screen does not have to be a single phosphor screen having an integral structure.

Further, in the above-mentioned embodiment, the case where the electron beam emitted from each electron gun is deflected by the deflecting device for generating the magnetic field has been described.
The deflection may be performed by electrostatic deflection, or one of the deflection performed by the pre-deflection device and the main deflection device may be performed as electromagnetic deflection, and the other may be performed by electrostatic deflection, and the combination may be performed.

In the above embodiment, the case of the NTSC system has been described, but the present invention can be similarly applied to other PAL system, SECAM system, HD system, HD-MAC system and double speed use. it can.

[0052]

EFFECTS OF THE INVENTION A plurality of electron guns for emitting a single electron beam are separately arranged, and the single electron beam emitted from each electron gun is deflected in a plurality of stages by a deflecting device, and each of the deflected electron beams is deflected. In a color picture tube device that divides and scans a phosphor screen into a plurality of regions by an electron beam, the plurality of regions that are divided and scanned by each electron beam are multiples of 3, and the electron beam causes the phosphor screen to be divided. In a color picture tube device that divides and scans into a plurality of regions in the horizontal and vertical directions, if the vertical region is a multiple of 3, then (a) the brightness, contrast, hue between adjacent regions, etc. Easy adjustment (b) By setting the total number of areas to be a multiple of 3, the image is played back with any video signal of the three-color video signal in any area, and the playback image Variability sense, by a multiple of 3 pieces of the can (C) vertical section to eliminate such abnormal reduction in brightness and hue,
The vertical scanning frequency and the horizontal scanning frequency of each area can be adjusted to the vertical and horizontal scanning frequencies of a normal color picture tube, respectively, and the design and manufacture of the drive circuit of the color picture tube device can be greatly simplified. As a result, there is no flicker, there is no hue anomaly and no reduction in brightness, and the brightness improvement effect, the depth reduction, and the resolution improvement effect can be sufficiently exerted by dividing and scanning the phosphor screen into a plurality of areas. be able to.

[Brief description of drawings]

FIG. 1 (a) is a perspective view for explaining the configuration of a color picture tube device which is an embodiment of the present invention, and FIG. 1 (b).
FIG. 4 is a sectional view taken along line BB.

FIG. 2 is an exploded perspective view shown for explaining the configuration of the color picture tube device.

FIG. 3 is a diagram for explaining a relationship between a transmitting side and an image receiving side according to the NTSC system when the phosphor screen is divided into a plurality of areas and divided and scanned.

FIG. 4 is a diagram for explaining scanning on the image receiving side according to the NTSC system.

FIG. 5 is a diagram for explaining deflection of an electron beam of the color picture tube device.

FIG. 6 is a diagram for explaining the convergence of an electron beam due to the above deflection.

FIG. 7 is a diagram for explaining reproduction of a three-color image for a plurality of divided areas.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Face plate 2 ... Side wall 3 ... Rear plate 4 ... Funnel 5 ... Envelope 8 ... Phosphor screen 9 ... Shadow mask 10 ... First mask mask installation member 11 ... Second mask mask installation member 14 ... Electron gun 15 ... Pre-deflection Device 16 ... Main deflection device 17 ... Scan lines R1 to R15 ... Region

Claims (2)

[Claims] 1. An electron gun unit in which a plurality of electron guns for emitting a single electron beam are separately arranged, and a single electron beam emitted from each of the electron guns arranged corresponding to each of the electron guns. A deflecting unit including a plurality of deflecting devices for deflecting in a plurality of stages, and a phosphor that is divided and scanned into a plurality of regions through a shadow mask by each electron beam deflected by the plurality of deflecting devices. A color picture tube apparatus comprising a screen, wherein the plurality of areas divided and scanned by each electron beam are a multiple of 3. 2. An electron gun section in which a plurality of electron guns for emitting a single electron beam are separately arranged, and a single electron beam emitted from each of the electron guns arranged corresponding to each of the electron guns. A deflecting unit including a plurality of deflecting devices for deflecting in a plurality of stages, and electron beams deflected by the plurality of deflecting devices are divided into a plurality of regions horizontally and vertically through a shadow mask. A color picture tube device comprising a phosphor screen that is divided and scanned, wherein the number of vertical areas that are divided and scanned by each electron beam is a multiple of 3.