JPH11204063A - Cathode-ray tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cathode-ray tube easy to assemble at heightened precision without decreasing the light emitting surface area of a phosphor screen. SOLUTION: A supporting mechanism for supporting a mutually opposed rectangular and flat face plate and rear plate against atmospheric pressure is installed between the face plate and the rear plate. A phosphor screen formed in the inner face of the face plate comprises stripe-like phosphor layer trios of three colors extended in parallel one another and black stripes 11 formed between neighboring phosphor layer trios. The supporting member of the supporting mechanism so installed as to be brought into contact with the black stripes at the tip and the is brought into contact with the rear plate in the other end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube, and more particularly, to a cathode ray tube which divides one phosphor screen into a plurality of regions, scans the plurality of regions, and combines images drawn in the respective regions to obtain one image. About.

[0002]

2. Description of the Related Art In recent years, various studies have been made on a high-definition cathode ray tube having a high-definition broadcast or a large screen accompanying the broadcast. As one example, JP-A-5-536363 and the like provide a cathode ray tube which scans a phosphor screen having an integrated structure into a plurality of regions by electron beams emitted from a plurality of electron guns.

A cathode ray tube of this type includes an envelope having a substantially flat face plate and a rear plate provided to face each other, and a phosphor screen is formed on an inner surface of the face plate. Further, a plurality of funnels are fixed to the rear plate, and electron guns are respectively disposed in the necks of these funnels.

In such a cathode ray tube, a plurality of supports are arranged inside the envelope in order to support the atmospheric pressure load applied to the flat face plate and the rear plate. It is desirable that these supports are arranged so as to be in contact with the non-light-emitting portion of the phosphor screen in order to prevent interference with the electron beam emitted from the electron gun. According to the cathode ray tube disclosed in JP-A-5-536363, the phosphor screen is a black stripe type phosphor screen having a stripe-shaped light absorbing layer (black stripe), and each support is formed in a wedge shape. The formed tip is disposed so as to contact the stripe-shaped light absorption layer.

When the tips of the supports are arranged on the stripe-shaped light absorbing layer as described above, it is necessary that the tips of the supports exactly coincide with the light absorbing layers. As the alignment method, the support is fixed to the rear plate in advance, and the positioning means is provided on the rear plate and the face plate to which the support is fixed, respectively. By assembling them in a predetermined positional relationship, it is conceivable to make the tip of the support coincide with the light absorbing layer of the phosphor screen.

On the other hand, a phosphor screen of a black stripe type generally has phosphor stripes R, G, and B of three colors.
And a stripe-shaped light absorbing layer (hereinafter, referred to as a black stripe) are arranged in parallel with each other. The three phosphor stripes R, G, and B are provided as one trio, and the black stripe is
It is formed between all the phosphor stripes.

Each phosphor stripe and each black stripe are formed to have substantially the same width over the entire surface.
In a general consumer cathode ray tube, in order to increase the light emitting area of the phosphor screen, the black stripe is formed to have a width slightly smaller than the width of each phosphor stripe, and the black stripe occupies the entire phosphor screen. The ratio is set to about 35%.

For example, when the pitch between phosphor trios is 1.2
In a phosphor screen set to 35 mm, the ratio of the black stripe to the entire phosphor screen is 35.
%, The width of the black stripe is about 0.14m
m, the width of each phosphor stripe is about 0.26 mm.

[0009]

However, when assembling a cathode ray tube provided with a phosphor screen having the above-described structure, it is very difficult to arrange the tips of the supports so as to coincide with predetermined black stripes. Will be difficult.
That is, since each support is a member that supports the atmospheric pressure acting on the face plate and the layer plate of the envelope, the width of the tip portion needs to be about 0.1 mm in consideration of its mechanical strength. In addition, assembly accuracy ± 0.0
If 2 mm is added, the width of the black stripe needs to be at least about 0.14 mm.

For example, when the face plate and the rear plate are configured to be supported by 30 supports,
It is very difficult to keep the dispersion of the placement accuracy within the above values for all the supports.

On the other hand, a method of widening the width of the flak stripe can be considered in order to allow a margin in the arrangement accuracy of the support with respect to the black stripe. In this case, however, the proportion of the black stripe in the phosphor screen increases. . As a result, the emission area ratio of the phosphor is reduced, and the luminance of the phosphor screen is reduced.

As described above, in the conventional cathode ray tube, it is difficult to increase the positioning accuracy and the assembling accuracy of the support with respect to the phosphor screen without lowering the brightness of the phosphor screen. It has been difficult to apply to pipes and the like.

The present invention has been made in view of the above points, and has as its object to improve the assembling accuracy without reducing the light emitting area of the phosphor screen, to increase the size of the screen and to increase the definition. It is an object of the present invention to provide a cathode ray tube which can sufficiently cope with the development.

[0014]

In order to achieve the above object, a cathode ray tube according to the present invention has a substantially rectangular flat face plate and a substantially rectangular flat face plate provided opposite to the face plate. And a vacuum envelope having a phosphor screen formed on the inner surface of the face plate, and disposed between the face plate and the rear plate. And a plurality of electron guns for emitting an electron beam toward the phosphor screen and scanning the phosphor screen by dividing the phosphor screen into a plurality of regions.

The phosphor screen includes a plurality of stripe-shaped phosphor layer trios of three colors extending in parallel with each other, a plurality of stripe-shaped light absorption layers formed only between adjacent phosphor layer trios, And the support means has one end in contact with a stripe-shaped light absorption layer located at a boundary between two adjacent areas of the phosphor screen scanned and divided into a plurality of areas by the electron gun. It is characterized by having.

According to the cathode ray tube having the above structure, the light absorbing layer between the stripe-shaped phosphor layers in each phosphor layer trio is omitted, and the stripe-shaped light absorption layer is provided only between adjacent phosphor layer trios. I have. Therefore, it is possible to increase the width of the stripe-shaped light absorbing layer without reducing the width of the stripe-shaped phosphor layer while keeping the overall size of the phosphor screen constant. And, by adopting a configuration in which the distal end portion of the support member is brought into contact with the widened stripe-shaped light absorption layer, the margin of arrangement accuracy is increased, and the support member is accurately brought into contact with the stripe-shaped light absorption layer. Can be done.

Further, according to the cathode ray tube, the plurality of phosphor layer trios are arranged side by side at a predetermined pitch, the width of the stripe-shaped light absorbing layer is 0.14 mm or more, and Is set to 35% or less.

Another cathode ray tube according to the present invention is a vacuum envelope having a substantially rectangular flat face plate, and a substantially rectangular flat rear plate provided opposite to the face plate. A phosphor screen formed on the inner surface of the face plate, support means disposed between the face plate and the rear plate for supporting the face plate and the rear plate against atmospheric pressure, A plurality of electron guns for emitting an electron beam and dividing the phosphor screen into a plurality of regions for scanning.

The phosphor screen includes a plurality of stripe-shaped phosphor layer trios of three colors extending in parallel with each other, a plurality of first stripe-shaped light absorption layers respectively formed between adjacent phosphor layer trios, A second stripe light absorption layer provided between adjacent stripe phosphor layers in each stripe phosphor layer trio and having a width smaller than the width of the first stripe light absorption layer; An end contacting a first stripe-shaped light absorption layer positioned at a boundary between two adjacent areas of the phosphor screen scanned by the electron gun while being divided into a plurality of areas. It is characterized by having.

Further, according to the present invention, in the cathode ray tube, the plurality of stripe-shaped fluorescent layer trios are arranged side by side at a predetermined pitch, and the width of the first stripe-shaped light absorbing layer is 0.14 mm. As described above, the sum of the width of the first stripe-shaped light absorption layer and the width of the second stripe-shaped light absorption layer is set to 35% or less of the predetermined pitch. .

According to the cathode ray tube having the above-described structure, the second stripes provided between the stripe-shaped phosphor layers in each phosphor layer trio are formed thin, and the second stripes are provided between the adjacent phosphor layer trios accordingly. The first striped light absorbing layer thus formed is formed thick. Therefore, it is possible to increase the width of the first stripe-shaped light absorption layer without reducing the width of the stripe-shaped phosphor layer while keeping the overall size of the phosphor screen constant. And the widened first
By contacting the distal end of the support member with the stripe-shaped light absorption layer, the margin of arrangement accuracy is increased, and the support member can be accurately contacted with the stripe-shaped light absorption layer. .

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention applied to a color cathode ray tube will be described in detail with reference to the drawings. As shown in FIGS. 1 to 3, the color cathode ray tube has a single phosphor screen 1 formed on an inner surface of a face plate 4, and a plurality of regions, which are irradiated with electron beams emitted from a plurality of electron guns 2. In the illustrated example, there are four regions R1-R2 in the horizontal direction and five in the vertical direction, for a total of 20 regions.
The structure is such that the divided images obtained in the respective regions by scanning by dividing into 0 are connected, and the synthesized color image is displayed on the phosphor screen 1.

The color picture tube is provided with a vacuum envelope 8 which has a horizontal axis (X-axis) and a vertical axis (Y-axis) perpendicular to each other and has a substantially rectangular flat shape made of glass. A face plate 4, a frame-shaped side wall 5 made of glass joined substantially perpendicularly to a peripheral portion of the face plate 4,
A substantially rectangular flat rear plate 6 made of glass joined to the side wall 5 and opposed to the face plate 4 in parallel;
And 20 funnels 7 made of glass bonded to the rear plate 6. The rear plate 6 has 2
Zero rectangular openings 9 are formed, and five in the horizontal direction and four in the vertical direction, corresponding to the regions R1 to R20 of the phosphor screen, are provided in a matrix in a total of 20. The plurality of funnels 7 each have a corresponding opening 9.
Are joined to the outer surface of the rear plate 6 so as to surround the rear surface.

The phosphor screen 1 is formed on the inner surface of the face plate 4, as shown in FIGS. The phosphor screen 1 is configured by combining a plurality of phosphor layer trios 10 and a light absorbing layer 11 having a stripe shape (hereinafter referred to as a black tripe).

That is, each phosphor layer trio 10 is blue,
Elongated striped phosphor layers B, G, which emit green and red light,
R, and these stripe-shaped phosphor layers extend in parallel with each other in contact with each other, and extend along the vertical direction of the face plate 4. The plurality of phosphor layer trios 10 are formed in parallel at a predetermined pitch P in the horizontal direction. Also, the black stripe 11
It is formed so as to be embedded in a gap between two adjacent phosphor layer trios 10, and extends in parallel with the phosphor layer trio 10 and along the vertical direction of the face plate 4.

In this embodiment, the width W1 of the stripe-shaped phosphor layer and the width W2 of the black stripe 11 are formed to be equal. For example, when the pitch P of the phosphor layer trio 10 is 1.2 mm, W1 and W2 are each set to 0.3 mm.

Here, the width W1 of the black stripe 11
Is set to about 25% of the pitch P in consideration of the size of the effective area of the phosphor screen 1 and the light emitting area. According to the present embodiment, a rectangular frame-shaped non-light-emitting portion 13 is formed at the peripheral portion of the phosphor screen 1. Four reference marks 14 for positioning a support member, which will be described later, with respect to the phosphor screen 1 are formed on a pair of horizontally extending sides of the non-light emitting portion 13. Each of the reference marks 14 is formed of two black stripes 2 adjacent to the phosphor screen 1 in the horizontal direction.
It is located on the extension of the black stripe 11 facing the boundary between the two regions.

Each of the reference marks 14 corresponds to the non-light emitting portion 13.
Is partially removed to expose the face plate surface. That is, the reference mark 14 is formed in a slit shape extending in the vertical direction, so that the phosphor screen side end of the support member described later can be seen through the face plate and the positioning mark 14 from the outer surface side of the face plate 4. I have.

On the inner surface of the face plate 4, a pair of elongated plate-shaped fixing members made of a nickel alloy having a thermal expansion coefficient similar to that of the face plate 4 made of glass are provided outside the non-light emitting portions 13 at both ends in the vertical direction. The members 15 are fixed by frit glass, and extend in the horizontal direction, respectively.

As shown in FIGS. 1 to 3, a shadow mask 17 is arranged inside the face plate 4 so as to face the phosphor screen 1. The shadow mask 17 is divided into five mask pieces M1 to M5 corresponding to the number of divisions (five) of the horizontal region of the phosphor screen 1, and each mask piece has a vertical direction as a longitudinal direction. It is formed in a flat rectangular shape.

As shown in FIG. 6, each of the mask pieces M1 to M5 has four rectangular pieces arranged in the longitudinal direction corresponding to the number of divisions (four) in the vertical direction of the area of the phosphor screen 1. Each of the effective portions has a large number of electron beam passage holes. And these effective parts 18
They are connected via an ineffective portion 19 where no electron beam passage hole is formed.

Each of the mask pieces M1 to M5 is attached to a rectangular mask frame 20 whose longitudinal direction is the vertical direction, and is arranged in parallel at predetermined intervals in the horizontal direction.
Each mask frame 20 is held on the face plate by fixing the fixing pieces 21 attached to both sides in the longitudinal direction to the fixing members 15 fixed to the inner surface of the face plate 4, respectively. Thereby, the effective portion 18 of each mask piece faces the corresponding area of the phosphor screen 1.

A pair of stages 22 are arranged between each of the mask pieces M1 to M5 and the inner surface of the face plate 4,
The mask pieces are set at a predetermined interval (q value) with respect to the inner surface of the face plate 4. The stage 22 has one end fixed to the fixing member 15 via the fixing piece 23, and the other end passing through the inside of the vertical end of the corresponding mask frame 20 and pressing against the mask piece to apply tension to the mask piece. doing.

As shown in FIGS. 2, 3, 7 and 8, between the face plate 4 and the rear plate 6,
A support mechanism 24 for supporting the atmospheric load applied to the face plate 4 and the rear plate 6 is provided. The support mechanism 24 includes, for example, 20 columnar support members 25 and a connecting portion 26 formed by connecting five support members. Each support member 25 is erected substantially perpendicularly to the face plate 4 and the rare plate 6 and has a front end 28 in contact with the face plate 4 and a base end in contact with the rear plate 6.

The support member 25 has a tip 28 which is located within the regions R1 to R20 of the phosphor screen 1.
Intersection of four adjacent regions and non-light emitting portion 1
In each of the three horizontal portions, a total of 20 pieces are provided in the vicinity of the boundary between two horizontally adjacent areas so as to be in contact with each other, 5 pieces in the vertical direction and 4 pieces in the horizontal direction. The five supporting members 25 in each row arranged in the vertical direction are connected to each other by the connecting portion 26 to form a supporting unit 34.

As shown in FIGS. 7 and 8, each support member 25 is made of a material having a thermal expansion coefficient similar to that of the face plate 4 and the rear plate 6 made of glass, for example, a nickel alloy. It has the same potential from 28 to the base end. The tip 28 of the face plate 4 of the support member 25 is formed in a wedge shape, and the tip surface 28a is formed in a flat rectangular shape. More specifically, each support member 25 is formed in a cylindrical shape having a diameter d of 8 mm, and the tip surface 28a of the wedge-shaped tip 28 is
8 m with a width of 0.1 mm and a length equal to the diameter of the support member 25
m.

The connecting portion 26 has a pair of elongated fitting members 29a and 29b having a U-shaped cross section, and is formed in a rectangular cylindrical shape by connecting the opening sides of these fitting members. The fitting members 29a and 29b are formed of a material having a thermal expansion coefficient similar to that of the face plate 4 and the rear plate 6 made of glass, for example, a nickel alloy, and at least the surfaces thereof have conductivity. Also, the fitting member 2
Five through holes 40 for inserting the support member 25 are formed in each of 9a and 29b, and are coaxially opposed to the through holes formed in the other fitting member. A fixing piece 30 for fixing the connecting portion 26 to the fixing member 15 on the face plate 4 is provided at both ends in the longitudinal direction of each connecting portion 26.
(See FIG. 3).

At a predetermined position in the axial direction of each support member 25, an annular collar 27 for accurately and firmly attaching the support member to the connecting portion 26 is fixed. Each support member 25 is inserted into a pair of opposed through holes 40 of the connecting portion 26, and is fixed to the connecting portion 26 by welding the collar 27 to the fitting member 29a. Therefore, in each support unit 34, the five support members 25
Extend in parallel with each other, and are connected to each other by a connecting member 26 extending perpendicular to the support members 25. Further, the five support members 25 are connected in a state where the longitudinal direction of the distal end surface 28 a is aligned with the longitudinal axis direction of the connecting portion 26.

As shown in FIGS. 2 and 3, each support unit 34 is provided with fixing pieces 30 provided at both ends of the connecting portion 26.
Are fixed to fixing members 15 fixed on both sides in the vertical direction of the inner surface of the face plate 4, thereby being attached to the face plate 4. At this time, the four support units 34 are arranged such that the longitudinal direction of the connecting portion 26 is
Are arranged between two mask pieces M1 to M5 adjacent to each other in the horizontal direction.

Further, each support unit 34 has a face in a state where the front end surfaces 28a of the two support members 25 at both ends in the longitudinal direction coincide with the reference marks 14 formed on the non-light emitting portion 13 of the phosphor screen 1, respectively. It is attached to the plate 4. Thereby, the middle three support members 25
As shown in FIG. 9, the tip surface 28a is in contact with the black stripe 11 located at the boundary between two adjacent regions of the phosphor screen among the black stripes 11 of the phosphor screen 1. It is arranged in. The tip surfaces 28a of these support members 25 are aligned with the black stripes 11 and extend in the vertical direction.

On the other hand, as shown in FIG. 2, the electron guns 2 are arranged in each of the necks 32 of the 20 funnels 7, and the electron beams emitted from the electron guns are provided around each of the necks. A deflection yoke 50 for scanning in the horizontal and vertical directions is attached.

In the color cathode ray tube having the above structure,
The electron beam emitted from the electron gun 2 disposed in each of the necks 32 of the 20 funnels 7 is horizontally and vertically deflected by the magnetic field generated by the deflection yoke 50, and the phosphor screen is passed through the shadow mask 17. 1, 5 in the horizontal direction and 4 in the vertical direction, a total of 20 regions R1 to R
Scan by dividing into 20. Then, the divided image drawn on the phosphor screen 1 by the divided scanning is transferred to the electron gun 2.
And a signal applied to the deflection yoke 50 so that there is no overlap or gap, and the synthesized color image is displayed on the phosphor screen 1. Atmospheric pressure acting on the face plate 4 and the rare plate 6 is received by each support member 25 of the support mechanism 24, thereby preventing the face plate and the rear plate from being damaged.

According to the color cathode ray tube configured as described above, in each phosphor layer trio 10 of the phosphor screen 1, the black stripes between the stripe phosphor layers are omitted, and the adjacent phosphor layer trio 10 is removed. The black stripes 11 are provided only between them. Therefore, when the overall size of the phosphor screen 1 and the pitch P of the phosphor layer trio 10 are the same as those in the related art, the width of the stripe-shaped phosphor layer is not reduced, that is, the phosphor screen 1 is not reduced.
Without reducing the brightness of the black stripe 11
Can be increased in width. Then, the leading end surface 28 of the support member 25 is placed on the widened black stripe 11.
With the configuration in which a is abutted, the margin of arrangement accuracy is increased, and each support member 25 can be accurately abutted against the predetermined black stripe 11.

For example, as described above, when the pitch P of the phosphor layer trio 10 is 1.2 mm, the width of each of the stripe-shaped phosphor layers and the black stripe 11 is 0.3.
mm. Since the width of the tip surface 28a of each support member 25 is 0.1 mm, the margin of the placement accuracy of the tip of the support 25 is 0.1 mm on one side, and the placement accuracy is much larger than in the past. Relaxation is possible.

At the same time, by reducing the number of black stripes 11, the light emitting area of the phosphor screen 1 is increased, and the luminance can be improved. From the above,
The support member can be accurately arranged with respect to the phosphor screen without lowering the luminance of the phosphor screen. As a result, it is possible to provide a color cathode ray tube which can sufficiently cope with an increase in screen size and definition.

FIG. 10 shows a phosphor screen 1 of a color cathode ray tube according to another embodiment of the present invention. According to this embodiment, two adjacent phosphor screens 1
A first black stripe 11a is formed between the three phosphor layer trios 10, and a stripe phosphor is also provided between the adjacent stripe phosphor layers B, G, and R in each phosphor layer trio 10. A second black stripe 11b extending parallel to the layer is formed.

Each of the first black stripes 11a is formed wider than the second black stripe 11b and the conventional black stripe. The second black stripe 11b is formed to have a width smaller than the width of the conventional black stripe.

The width W2 of the first black stripe 11a
Is set to be larger than the width W3 of the second black stripe 11b. When the pitch P is 1.2 mm, the first and second black stripes 11a, 11a
The widths W2 and W3 of b are 0.3 mm and 0.05 m, respectively.
m, and (W1 + 2W3) / P at this time is 33.
3%.

In the color cathode ray tube having the phosphor screen 1 having the above-described structure, each of the support members 25 of the support mechanism 24 has a front end surface 28a of the first black stripe 11a in the horizontal direction of the phosphor screen. Are arranged in contact with a black stripe positioned opposite a boundary between two adjacent regions.

In another embodiment configured as described above, the second screen in each phosphor layer trio of the phosphor screen is also provided.
By forming the black stripes thinner and forming the first black stripes thicker between the adjacent phosphor layer trios thicker, the support member for the phosphor screen can be reduced without lowering the luminance of the phosphor screen. Can have a margin in the arrangement accuracy of the components. Therefore,
It is possible to provide a color cathode ray tube which can sufficiently cope with an increase in screen size and definition.

Further, according to this embodiment, by providing the second black stripe also in each phosphor layer trio, the variation in the shape of each stripe phosphor layer can be compensated by the black stripe. ,
The contrast can be improved.

The present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the present invention. For example, in the above-described embodiment, the phosphor screen has a configuration in which a wide black stripe is provided between all two adjacent phosphor layer trios, but is not limited thereto. The black stripe only needs to be provided at least in a portion facing the boundary between adjacent regions of the phosphor screen among the phosphor layer trios. Further, the shadow mask can be omitted as necessary.

[0053]

As described above in detail, according to the present invention, by improving the structure of the phosphor screen, the assembly is easy, and the assembling accuracy is improved without reducing the light emitting area of the phosphor screen. Therefore, it is possible to provide a cathode ray tube which can sufficiently cope with an increase in screen size and a high definition.

[Brief description of the drawings]

FIG. 1 is a perspective view of a color cathode ray tube according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG. 1;

FIG. 3 is an exploded perspective view of the color cathode ray tube.

FIG. 4 is a rear view of a face plate of the color cathode ray tube.

FIG. 5 is an enlarged plan view showing a part of a phosphor screen of the color cathode ray tube.

FIG. 6 is a perspective view showing a part of a shadow mask of the color cathode ray tube.

FIG. 7 is a perspective view showing a support unit of the color cathode ray tube support mechanism.

FIG. 8 is a sectional view of the support unit.

FIG. 9 is a cross-sectional view showing a contact state between the phosphor screen and the tip of a support member of the support unit.

FIG. 10 is an enlarged plan view showing a part of a phosphor screen of a color cathode ray tube according to another embodiment of the present invention.

[Description of Signs] 1 ... Phosphor screen 2 ... Electron gun 4 ... Face plate 6 ... Rear plate 8 ... Vacuum envelope 10 ... Phosphor layer trio 11 ... Black stripe 11a ... First black stripe 11b ... Second Black stripe 17 ... Shadow mask 24 ... Support mechanism 25 ... Support member 26 ... Connecting member 28 ... Tip 28a ... Tip face 34 ... Support unit R, G, B ... Striped phosphor layers R1 to R20 ... Region

Claims (4)

[Claims] 1. A substantially rectangular flat face plate,
A vacuum envelope having a substantially rectangular flat rear plate provided opposite to the face plate, a phosphor screen formed on an inner surface of the face plate, and the face plate and the rear plate. A support means disposed between the support member and the support member for supporting the face plate and the rear plate with respect to the atmospheric pressure; and a plurality of light emitting portions for emitting an electron beam toward the phosphor screen and dividing the phosphor screen into a plurality of regions for scanning. An electron gun; and the phosphor screen includes a plurality of phosphor screens extending parallel to each other.
Color stripe-shaped phosphor layer trio, and a plurality of striped light-absorbing layers respectively formed between adjacent phosphor layer trios, wherein the support means is divided into a plurality of regions by the electron gun. A cathode ray tube having one end in contact with a stripe-shaped light absorption layer located at a boundary between two adjacent regions of the phosphor screen to be scanned. 2. The plurality of phosphor layer trios are arranged side by side at a predetermined pitch, and the width of the stripe-shaped light absorption layer is set to 0.14 mm or more and 35% or less of the predetermined pitch. The cathode ray tube according to claim 1, wherein 3. A substantially rectangular flat face plate;
A vacuum envelope having a substantially rectangular flat rear plate provided opposite to the face plate, a phosphor screen formed on an inner surface of the face plate, and the face plate and the rear plate. A support means disposed between the support member and the support member for supporting the face plate and the rear plate with respect to the atmospheric pressure; and a plurality of light emitting portions for emitting an electron beam toward the phosphor screen and dividing the phosphor screen into a plurality of regions for scanning. An electron gun; and the phosphor screen includes a plurality of phosphor screens extending parallel to each other.
Color stripe-shaped phosphor layer trio, a plurality of first stripe-shaped light absorption layers formed between adjacent phosphor layer trios, and adjacent stripe-shaped phosphor layers in each stripe-shaped phosphor layer trio. And a second stripe-shaped light absorption layer having a width smaller than the width of the first stripe-shaped light absorption layer, wherein the support means is divided into a plurality of regions by the electron gun. A cathode ray tube having one end in contact with a first stripe-shaped light absorption layer located at a boundary between two adjacent regions of the phosphor screen scanned in a manner as described above. 4. The plurality of stripe-shaped phosphor layer trios,
The width of the first stripe-shaped light absorption layer is 0.14 mm or more, and the width of the first stripe-shaped light absorption layer and the width of the second stripe-shaped light absorption layer are arranged at a predetermined pitch. The cathode ray tube according to claim 3, wherein the sum of the width and the width is set to 35% or less of the predetermined pitch.