JPH06176705A - Color cathode-ray tube and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide a color cathode-ray tube hard to cause problems such as color displacement in a flourescent screen, which is caused by the mechanical and thermal deformation of a shadow mask and a support spring due to handling and heat treatment during the manufacturing process of the color cathode- ray tube and also provide the structure of a color cathode-ray tube permitting the printing method manufacture of a flourescent screen. CONSTITUTION:A flourescent screen is separated from the inner surface of the face plate part 3 of a panel and formed on a separate transparent base board and formed in one-body structure with a shadow mask comprising a stretched slip-like grill 6 which is a straight line in the vertical direction to an image screen and a fixed curve in the horizontal direction. The transparent base board has plane-like structure in the process of forming a flourescent screen. Since the shadow mask and the flourescent screen are formed in one- body structure, a high-quality cathode-ray tube which hardly is affected by the deformation of each part and is hard to cause troubles such as color displacement in a flourescent screen can be obtained. Since a printing method is applicable to the structure of a flourescent screen, the cost of a color cathode-ray tube can be greatly reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color cathode ray tube, and more particularly to a color cathode ray tube having a shadow mask as a color selection electrode and a method for manufacturing the same.

[0002]

2. Description of the Related Art As a color selection electrode, a fluorescent screen and a shadow screen of a conventional color cathode ray tube having a shadow mask are used.
FIG. 23 shows the structure of the mask portion and the manufacturing method thereof.
~ It demonstrates by FIG.

FIG. 23 is a view showing the structure of a conventional color cathode ray tube having a slot type shadow mask as a color selection electrode, and a partial cross section is shown for the sake of easy understanding of the structure. In the figure, 27 is a conventional color cathode ray tube, and the panel 2 and the funnel 8 constitute a vacuum envelope. The panel 2 and the funnel 8 are usually made of glass press, and they are joined by a frit glass 10 which is melted and crystallized at a temperature of 400 to 450 ° C. in the manufacturing process of the color cathode ray tube. The panel 2 comprises a face plate portion 3 and a side wall portion 4,
A black matrix layer, a three-color RGB phosphor layer, an aluminum back layer, and the like are formed on the inner surface of the face plate portion 3, and together with the face plate portion 3, a fluorescent surface 5 is formed. Therefore, the face plate portion 3 plays a part of the vacuum envelope of the color cathode ray tube 27 and also serves as a substrate for forming the phosphor screen 5.

A slot-type shadow mask 28 is arranged so as to face the fluorescent screen 5 at regular intervals. This slot type shadow mask 28 is 0.1 to
Patterning is performed on a steel plate having a thickness of 0.3 mm, for example, by using a photoengraving technique, fine slot-shaped holes 29 are formed by etching, and a constant curved surface is formed by pressing, which is held by the metal frame 7. This metal frame 7 has a metal pin (not shown) embedded at a fixed position on the inner surface of the side wall portion 4 of the panel 2 via a support spring (not shown) having one end welded to the metal frame 7 itself. Suspended by. An internal magnetic shield 25 housed inside the funnel 8 is attached to the bottom of the metal frame 7 to prevent a fluorescent screen from being mis-landed by the electron beam generated by the effect of an external magnetic field such as geomagnetism. Prevents adverse effects such as color shift.

An electron gun 9 (detailed structure is not shown) is enclosed in a neck portion 12 connected to the funnel 8, and electron beams corresponding to the three RGB colors emitted from the electron gun 9 are slot-type shadows. The light is emitted from the phosphor screen by passing through the slot-shaped hole 29 of the mask 28 and accurately hitting the phosphor of a desired color. The anode button 11 is a metal electrode embedded in the funnel 8 and is for externally supplying a high voltage to be applied to the fluorescent screen 5 of the color cathode ray tube 27 and the like. With respect to the shape of the face plate portion 3 which constitutes the panel 2, in the past, there were many cases where a simple spherical surface was cut out, but recently, the image screen of the television set, that is, the fluorescent screen 5 has been adopted. In order to make the face plate portion 3 of the glass plate as flat as possible and to maintain the strength of the vacuum envelope of the glass bulb against the atmospheric pressure, there are many cases in which an aspherical structure composed of complicated curved surfaces is adopted. That is,
The horizontal cross section and the vertical cross section of the video screen shown in the figure are both composed of complicated curves. As the shape of the face plate portion 3 of the phosphor screen 5 becomes complicated, the shape of the slot-type shadow mask 28 as a color selection electrode also becomes complicated, and a cross section corresponding to the horizontal direction of the video screen, Also, the cross section corresponding to the vertical direction is composed of complicated curves.

FIG. 24 shows a vertical sectional view of a conventional color cathode ray tube 27 and a partially enlarged view thereof. As described above, the face plate portion 3 of the panel 2 and the cross-section of the slot shadow mask 28 have complicated curves. Further, the metal frame 7 holding the slot-type shadow mask 28 has a side wall 4 of the panel 2 via a support spring 14 having one end welded to the metal frame 7 itself.
With a metal pin 15 embedded in place on the inner surface of the
Suspended. An inner conductive film 17 is applied to the inner surface of the funnel 8, and the high voltage supplied from the anode button 11 is passed through the conduction spring 16 to the metal frame 7
And to the slotted shadow mask 28. The high voltage introduced to the metal frame 7 also passes through the support spring 14 having one end welded to the metal frame 7 itself and the metal pin 15 fitted to the support spring 14, and the metal pin 15 and the fluorescent screen 5 are electrically conductive. Conductive film 3 for electrically conducting the conductive black matrix layer 20 and the aluminum back layer 22
It is applied to the phosphor screen 5 via 0.

In the enlarged view of the C portion of this figure, the structure of the phosphor screen 5 is not clearly understood, but the black matrix layer 20 has a large number of openings and non-openings in the direction perpendicular to the paper surface. The RGB three-color phosphor layer 21 has a large number of RGB three-color phosphor stripes which are continuous in the direction perpendicular to the paper surface, corresponding to the openings of the black matrix layer. In addition, the internal magnetic shield 25
Are attached in such a manner that the inside of the funnel 8 is covered up to the vicinity of the opening of a deflection yoke (not shown) attached to the outer surface of the funnel 8 on the neck side.

FIG. 25 shows a conventional color cathode ray tube 2 as well.
7 is a horizontal sectional view and a partially enlarged view thereof. As described above, the face plate portion 3 of the panel 2 and the cross-section of the slot shadow mask 28 have complicated curves. In the enlarged view of the D portion of this figure, the phosphor screen 5 formed of the black matrix layer 20, the RGB three-color phosphor layer 21, the aluminum back layer 22 and the like formed on the inner surface of the face plate portion 3 of the panel 2 is shown. Has been done.
The RGB three-color phosphor layer 21 has an elongated striped structure continuous in the direction perpendicular to the paper surface. The slot-type shadow mask 28 has a slot-shaped hole 29 that is long in the direction perpendicular to the paper surface.

In such a conventional color cathode ray tube 27, an electron beam corresponding to the three colors RGB emitted from the electron gun 9 is electromagnetically generated by a deflection yoke (not shown) attached to the outer surface of the funnel 8 on the neck side. After being deflected, it reaches the RGB three-color phosphor layer 21 of the phosphor screen 5 through the slot-shaped hole 29 of the slot shadow mask 28, and excites and emits a desired phosphor by the energy of the electron beam. . In this way, the color cathode ray tube 27
An image is displayed on the phosphor screen 5 of. For this reason,
Slot-shaped hole 29 of slot type shadow mask 28
And the geometrical positional relationship between the RGB three-color phosphor layer 21 of the phosphor screen 5 is very important, and if this causes a deviation for some reason, the electron beam corresponding to each color will not hit the desired phosphor layer. In addition, since the other phosphor layers are excited to emit light, a problem such as color shift occurs in the image projected on the phosphor screen 5.

As described above, the geometrical positional relationship between the opening position of the black matrix layer 20 of the phosphor screen 5, that is, the formation position of the RGB three-color phosphor layer 21 and the slot-shaped hole 29 of the slot type shadow mask 28. Is very important, so that the black matrix layer 20 and the R of the phosphor screen 5 and the red matrix are conventionally formed by using the technique of photolithography with reference to the slot-shaped holes 29 of the slot-type shadow mask 28.
The GB three-color phosphor layer 21 has been formed. Therefore,
The slot type shadow mask 28 used for forming the phosphor screen 5 and the completed phosphor screen 5 are always treated as a fixed combination until the color cathode ray tube 27 is completed. 26 and 27,
A method of forming the phosphor screen 5 by the conventional photolithography technique will be described in detail.

FIG. 27 shows a black matrix layer 20 and an RGB three-color phosphor layer 21 of a conventional color cathode ray tube 27.
The schematic sectional drawing of the exposure apparatus 60 for forming the fluorescent surface 5 etc. of the etc. by the photoengraving method is shown. The panel 2 on which the photosensitive material 59 such as a photoresist or phosphor slurry for forming the black matrix layer 20 is applied, formed into a film, and dried on the inner surface of the face plate portion 3 is fixed on the exposure device 60. It is accurately positioned and fixed by the stopper 65. At this time, the slot type shadow mask 28 held by the metal frame 7 is fixed in position on the inner surface of the panel 2 by the metal pin 15 embedded in the inner surface of the side wall portion 4 of the panel 2 through the support spring 14. Suspended and fixed.

In this state, the photosensitive material 59 is exposed by the ultraviolet rays from the exposure light source 64 through the slot-shaped holes 29 of the slot shadow mask 28. At this time, a main lens 61 and an auxiliary lens 62 are provided between the exposure light source 64 and the panel 2 for matching the electron beam trace during the operation of the color cathode ray tube 27 and the light trace during the exposure.
In addition, a light control filter 63 or the like for equalizing the exposure amount on the inner surface of the panel 2 is installed. When the exposure under a constant condition is completed, the inner surface of the panel 2 is developed with deionized water at a constant temperature, the inner surface is dried, and the patterning step of one cycle is completed. Therefore, in the manufacture of the phosphor screen 5 of the conventional color cathode ray tube 27, it is necessary to repeat the steps of coating, film-forming, drying, exposing, developing, and drying these photosensitive materials 59 and the like four times in total. The manufacturing process is very complicated.

FIG. 26 shows a process of manufacturing the phosphor screen 5 of the conventional color cathode ray tube 27 as described above.
Shows the formation of the black matrix layer 20 on the inner surface of the face plate portion 3 of the panel 2. First face
After cleaning the inner surface of the plate portion 3 with hydrofluoric acid or the like, for example, PVP (polyvinyl pyrrolidone) is coated with a photoresist containing an azide-based substance as a photosensitizer, formed into a film, and dried. The slot type shadow mask 28 is attached to a fixed position on the inner surface and set at a fixed position on the exposure device 60, and the position of the light source 64 for exposure is set so as to correspond to the electron beam positions of RGB three colors when the color cathode ray tube 27 is operating. Etc. are changed and exposure is performed three times. After that, the inner surface of the panel 2 is sprayed with deionized water at 40 ° C., for example, and developed, and then dried to obtain three curing photos per opening row of the slot-like holes 29 of the slot shadow mask 28.・
Form a temporary stripe of resist. After that, a suspension containing a black material is applied, film-formed, and dried on the entire inner surface of the face plate portion 3 of the panel 2 and cured by a lift-off method, for example, with an oxidizing agent such as hydrogen peroxide solution. When the temporary stripe of photoresist is swollen and decomposed,
Slot-shaped hole 29 of slot type shadow mask 28
The formation of the black matrix layer 20 having three striped openings per opening row is completed.

Is a G-shaped opening corresponding to G (green) of the stripe-shaped openings of the black matrix layer 20 formed on the inner surface of the face plate section 3 of the panel 2.
(Green) shows formation of a phosphor layer. For example, after adding various surfactants to a solution obtained by adding sodium dichromate as a photosensitizer to PVA (polyvinyl alcohol),
A G-color phosphor slurry is prepared by dispersing, for example, a zinc sulfide-based G (green) light-emitting phosphor [ZnS: Cu, Au, Al, etc.] having an average particle diameter of 5 to 15 μm. The G-color phosphor slurry is applied to the inner surface of the face plate portion 3 of the panel 2 on which the black matrix layer 20 is formed, formed into a film, and dried, and the slot type shadow mask 28 is placed at a predetermined position on the inner surface of the panel 2. The exposure light source 64 is set at a fixed position on the mounting exposure device 60, and exposure is performed by the position of the exposure light source 64 corresponding to the G (green) electron beam position when the color cathode ray tube 27 is operating. After this, the inner surface of the panel 2 is, for example, 40 ° C.
Deionized water is sprayed, developed, and dried to complete formation of the G (green) phosphor layer in the stripe-shaped openings corresponding to G (green) of the black matrix layer 20.

Then, in the same manner, the B (blue) of the black matrix layer 20 is dealt with by the B color phosphor slurry in which the zinc sulfide type B (blue) light emitting phosphor [ZnS: Ag] is dispersed. A black matrix is formed by using a B (blue) phosphor layer in the stripe-shaped opening and an R color phosphor slurry in which a rare earth R (red) light-emitting phosphor [Y ₂ O ₂ S: Eu] is dispersed. Layer 20
The R (red) phosphor layer is formed in the stripe-shaped opening corresponding to R (red), and the RGB three-color phosphor layer 21 is completed.

As described above, the conventional method of manufacturing the phosphor screen 5 by the photolithography method is very complicated in terms of the manufacturing process, and the black matrix layer 20, the G (green) phosphor layer, and the B layer are used.
When forming each of the (blue) phosphor layer and the R (red) phosphor layer, it is necessary to repeat the steps of coating, film formation, drying, exposure, development and drying. In these steps, the concentration of the chemical solution,
Temperature, the number of rotations, time and surface temperature of the panel 2 during film formation by the spin coating method, film drying conditions, temperature and exposure amount of the panel 2 during exposure, liquid temperature and time during development, The temperature and humidity of the atmosphere of the entire room where photoengraving is performed control the process properly, and the quality and yield of the products are subtly affected. For this reason, the manufacturing facility becomes very large, the initial capital investment is large, and the operating cost is also high, which is a major factor in increasing the cost of the color cathode ray tube 27.

A printing method has been proposed as a simple method instead of the photolithographic method for manufacturing the fluorescent screen 5. This is one in which a black matrix layer 20, a G (green) phosphor layer, a B (blue) phosphor layer, an R (red) phosphor layer, etc. are sequentially formed using a screen printing method or the like. Is. In the case of the printing method, since the phosphor screen can be patterned by each plate corresponding to the black matrix layer, the fluorescent material layer, etc., the manufacturing process is very simple.

However, in the case of printing the fluorescent screen 5 of the color cathode ray tube 27, there are many problems. (1) The inner surface of the face plate portion 3 of the panel 2 in which the fluorescent screen 5 of the normal color cathode ray tube 27 is formed. Has a very complicated shape, and it is difficult to bring the printing plate into close contact with it. (2) In addition, since the panel 2 is manufactured by pressing a glass material, the shape of the inner surface of the face plate portion 3 has a large variation. Therefore, (usually, the waviness component of the inner surface is about ± 300 μm. It is said that there is.) Similar to (1) above, the plates do not adhere well. (3) Since the panel 2 has the side wall portion 4, the side wall portion 4 interferes with and interferes with the inner surface of the face plate portion 3 of the panel 2 during printing. Due to such reasons, it has not yet been put to practical use.

[0019]

In the conventional color cathode ray tube, when the fluorescent screen 5 is formed, the photolithography method is used. Therefore, the slot-shaped holes 29 of the slot type shadow mask 28 and the RGB three colors of the fluorescent screen 5 are used. Although the geometrical positional relationship with the phosphor layer 21 is well matched, the slot-type shadow mask 28, the metal frame 7 and the support spring 14 are mechanically and thermally deformed by the subsequent handling and heat treatment. However, there is a problem in that the geometrical positional relationship is deviated to cause inconvenience such as color misregistration during the operation after the color cathode ray tube 27 is completed.

Further, in the conventional color cathode ray tube 27, since the photolithography method is used when forming the phosphor screen 5, a total of at least four coatings, film formations, and dryings are required in the manufacturing process of the phosphor screen.
Since it is necessary to repeat exposure, development, and drying, the manufacturing process becomes very complicated, which causes a significant increase in cost in manufacturing the color cathode ray tube 27 in terms of yield and equipment investment, and space for the manufacturing process. However, there is also a problem that a large area is required. Further, as a simple alternative method, a method of manufacturing the fluorescent screen 5 by a printing method has been proposed, but it has not been put into practical use mainly due to the shape problem of the panel 2.

Further, in the conventional color cathode ray tube 27, of the glass bulb as the vacuum envelope, the funnel 8 is made of relatively low cost lead (Pb) -added glass as an X-ray protection measure. Since the panel 2 cannot use the lead (Pb) -added glass because it is necessary to alleviate the glass coloring phenomenon (browning phenomenon) due to the electron beam, and the expensive strontium (Sr) -added glass is used, there is a cost problem. There was also. In addition, two kinds of glass having different compositions are used in the manufacturing process of the color cathode ray tube 27 to obtain the frit glass 1.
It is necessary to join them by 0, and there are technically delicate and difficult problems such as matching of thermal expansion coefficients.

The present invention has been made in order to solve the above-mentioned problems, and the RG of the fluorescent screen of a color cathode ray tube is used.
The geometrical positional relationship between the B3 color phosphor layer and the holes of the shadow mask is unlikely to be displaced, and the manufacturing method of the phosphor screen can be very simplified and the cost can be reduced. Further, the glass as a vacuum envelope can be manufactured. -The purpose is to obtain a color cathode ray tube with a low manufacturing cost in which the bulb and the funnel are made of relatively low cost lead (Pb) -doped glass, and a manufacturing method suitable for this color cathode ray tube is provided. The purpose is to do.

[0023]

In the color cathode ray tube according to the present invention, the fluorescent screen is separated from the inner surface of the face plate portion of the panel and is formed on another transparent substrate, and the screen is straight and horizontal in the vertical direction. A shadow consisting of an expanded slit grille with a constant curved structure in the direction
It is an integrated structure with the mask. Further, the glass material of the panel constituting the vacuum envelope is made of lead (Pb) -added glass which is the same material as the funnel glass. Further, as a method for forming a fluorescent screen on such a transparent substrate, a printing method is used instead of the conventional photoengraving method.

[0024]

In the color cathode ray tube according to the present invention, the fluorescent screen is separated from the inner surface of the face plate portion of the panel and is formed on another transparent substrate, and a straight line is formed in the vertical direction of the image screen and a fixed curved structure is formed in the horizontal direction. Since it has an integral structure with the shadow mask consisting of the expanded slit-like grill that it has, the shadow mask surface and the frame and supporting springs that support it are mechanical, due to handling during the manufacturing process of the color cathode ray tube and heat treatment. Even if thermal deformation occurs, the shadow mask and the phosphor screen are integrally changed, so that inconvenience such as color shift of light emission is less likely to occur during operation after the completion of the color cathode ray tube.

Further, in the color cathode ray tube according to the present invention, the fluorescent surface is separated from the inner surface of the face plate portion of the panel and is formed on another transparent substrate.
The electron beam does not hit the inner surface of the plate directly.
Therefore, even if a relatively low cost lead (Pb) -added glass is used as a material for the panel, there is no fear of the coloring phenomenon (browning phenomenon) of the glass due to the electron beam, and the glass is the same material as the funnel. Therefore, the cost of the color cathode ray tube can be reduced.

In the color cathode ray tube according to the present invention, the fluorescent surface is separated from the inner surface of the face plate portion of the panel and is formed on another transparent substrate (planar when the fluorescent surface is formed). It is possible to apply the fluorescent screen manufacturing method of the printing method, which was difficult to apply due to the flatness accuracy.

[0027]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing the structure of a color cathode ray tube according to the present invention, and a partial cross section is shown in order to make the structure easy to understand. In the figure, 1 is a color cathode ray tube of the present invention,
As in the conventional color cathode ray tube, this constitutes a vacuum envelope with the panel 2 and the funnel 8. The panel 2 and the funnel 8 are made by pressing glass as in the conventional case. Both of them are frit that melts and crystallizes at a temperature of 400 to 450 ° C. in the manufacturing process of the color cathode ray tube.
It is joined by the glass 10. In the color cathode ray tube according to the present invention, unlike the conventional case, the fluorescent surface is not formed on the inner surface of the face plate portion 3 of the panel 2. Therefore, the panel 2 serves purely as a vacuum envelope.

Reference numeral 18 denotes a shadow mask * phosphor screen structure which is the heart of the present invention. Reference numeral 5 denotes the fluorescent surface of the color cathode ray tube of the present invention, which is the face plate portion 3 of the panel 2.
Black matrix layer, RG on another transparent substrate
A B3 color phosphor layer, an aluminum back layer and the like are formed. Reference numeral 6 denotes a slit-shaped grill that is used as a shadow mask for the color cathode ray tube of the present invention, and is stretched and fixed by seam welding or the like by applying a certain tension to the metal frame 7, and is a vertical direction of the video screen. Has a curved surface composed of a straight line and a curved line in the horizontal direction.
The fluorescent screen 5 and the slit-shaped grill 6 are arranged so as to face each other at a predetermined interval, and both are integrated via a metal frame 7, and a shadow mask * fluorescent screen structure 18 is provided.
Is formed.

This shadow mask * phosphor screen structure 18
Is suspended inside the panel 2 by a metal pin (not shown) embedded in the inner surface of the side wall portion 4 of the panel 2 via a support spring (not shown) having one end welded to the metal frame 7 itself. Has been done. At the bottom of this metal frame 7,
As in the conventional case, an internal magnetic shield 25 housed inside the funnel 8 is attached, and the color shift of the fluorescent screen due to miss landing of the electron beam on the fluorescent screen caused by the effect of an external magnetic field such as the earth's magnetism. It prevents the harmful effects such as. An electron gun 9 (detailed structure is not shown) is enclosed inside a neck portion 12 connected to the funnel 8, and electron beams corresponding to RGB three colors emitted from the electron gun 9 are emitted from the slit-shaped grill 6. By passing through the slit hole and accurately hitting the phosphor of a desired color, the phosphor screen emits light.

The anode button 11 is a metal electrode embedded in the funnel 8 and serves to externally supply a high voltage applied to the fluorescent screen 5 and the like, as in the conventional color cathode ray tube. The shape of the face plate portion 3 forming the panel 2 can be freely selected to some extent regardless of the shape of the fluorescent screen, unlike the conventional case. In the case of the color cathode ray tube of the present invention, this is separated from the inner surface of the face plate portion 3 which constitutes the panel 2,
This is because the fluorescent screen is formed on another transparent substrate.

FIG. 2 shows a vertical sectional view of the color cathode ray tube 1 of the present invention and a partially enlarged view thereof. As described above, the shadow mask * phosphor screen structure 18 is arranged such that the phosphor screen 5 is disposed so as to face the slit-shaped grill 6 which is stretched and fixed by applying constant tension to the metal frame 7 by seam welding or the like. The two are integrated via the metal frame 7. Since the slit-shaped grill 6 is pulled in the vertical direction of the video screen, it becomes a straight line as a vertical sectional view. In the enlarged view of the portion A, although the structure of the slit-shaped grill 6 is not clearly understood, it has a large number of slit-shaped openings and non-openings in the direction perpendicular to the paper surface. The slit-shaped opening is continuous from the upper side to the lower side in the vertical direction of the video screen. Such a slit-shaped grill 6 performs fine patterning on a thin metal plate by photolithography,
It is made by subjecting this to chemical etching.

A transparent substrate 19 having a fluorescent screen 5 formed thereon.
Is installed so as to keep a constant distance from the slit-shaped grill 6, so that it is theoretically a straight line in the vertical direction of the video screen in the sectional view of the fluorescent screen 5. Transparent substrate 1
Although glass is most commonly used as the material of 9, the transparent plastic can be used as long as there is no problem in releasing gas in a vacuum or heat resistance to heat treatment in the manufacturing process. The fluorescent screen 5 is black on the transparent substrate 19.
The matrix layer 20, the three-color phosphor layer 21, and the aluminum back layer 22 are laminated. Although the structure of the fluorescent screen 5 is not clearly understood in this enlarged view of the A part, the black matrix layer 20 has a large number of openings and non-openings in the direction perpendicular to the paper surface. The shadow mask * phosphor screen structure 18 has side walls 4 of the panel 2 via a support spring 14 having one end welded to the metal frame 7 itself.
It is suspended inside the panel 2 by a metal pin 15 embedded in the inner surface of the panel. Although the cross-sectional shape of the face plate portion 3 of the panel 2 that plays a role as a part of the vacuum envelope is linear in accordance with the cross-sectional view of the fluorescent screen 5 in the enlarged view of the A portion, In the color cathode ray tube, the face plate portion 3 of the panel 2 is irrelevant to the phosphor screen structure, so it is not necessarily required to be a straight line, as long as a proper space can be provided between the shadow mask and the phosphor screen structure 18. The cross-sectional shape of the face plate portion 3 of the panel 2 in the vertical direction does not have to be a straight line.

The transparent substrate 19 constituting the fluorescent screen 5 is aligned with the slit-shaped grill 6 in a geometrical positional relationship, and then the metal frame 7 is formed by the conductive frit glass 23.
Fixed to. At this time, during operation of the completed color cathode ray tube, the temperature of the transparent substrate 19 constituting the phosphor screen 5 rises due to the energy when the electron beam impinges on the phosphor screen,
In order to eliminate the problem that the transparent substrate 19 is deformed by the thermal expansion of the transparent substrate 19 and the geometrical relationship between the phosphor screen 5 and the slit-shaped grill 6 is displaced, tension (tensile stress) is applied to the transparent substrate. Then, it is desirable to fix it to the metal frame. In addition, the transparent substrate 1 that constitutes the phosphor screen 5
In order to alleviate the deformation such as slack of the transparent substrate 19 due to the difference in thermal expansion between the metal frame 7 and the metal frame 7, the material of the transparent substrate 19 forming the phosphor screen 5 and the material of the metal frame 7 have substantially the same thermal expansion coefficient. Is desirable. When a glass material is used as the material of the transparent substrate 19 that constitutes the phosphor screen 5, the Kovar material (28% Ni-17% Co-iron alloy) is similar to the thermal expansion characteristics of glass, including the inflection point. Therefore, it is an optimum material for the metal frame 7. When the metal frame 7 made of Kovar material is used, the conductive frit glass 23 can easily bond and fix the glass material to the transparent substrate 19.

Regarding the electrical connection to the high voltage phosphor screen 5 supplied from the anode button 11, the electrical connection between the phosphor screen 5 and the metal frame 7 is important. As described above, the transparent substrate 19 forming the fluorescent screen 5 is fixed to the metal frame 7 by the conductive frit glass 23 after matching the geometrical positional relationship with the slit-shaped grill 6. Therefore, the anode button 11 and the phosphor screen 5 are electrically connected by the conductive paint 24 between the bonding portion of the conductive frit glass 23 and the black matrix layer 20 or the aluminum back layer 22 of the phosphor screen 5. The electrical conduction between the anode button 11 → the inner conductive film 17 → the conductive spring 16 → the metal frame 7 → the conductive frit glass 23 → the conductive paint 24 → the fluorescent surface 5 (the black matrix layer 20 or the aluminum back layer) It can be done by the route of 22).

The metal frame 7 is very important in maintaining the geometrical positional relationship between the transparent substrate 19 forming the fluorescent screen 5 and the slit-shaped grill 6. The relative distance between the two is determined by the positional relationship between the support surface of the transparent substrate 19 of the metal frame 7 and the support surface of the slit-shaped grill 6. Therefore, as shown in the enlarged view of part A, the metal frame 7 has a stepped shape in which the supporting surface of the transparent substrate 19 and the supporting surface of the slit-shaped grill 6 are substantially parallel to each other, and the accuracy of the distance between the two is important. Made by good machining. Regarding the support spring 14 for supporting the metal frame 7, in the conventional color cathode ray tube, in order to correct the deviation of the relative distance from the fluorescent screen due to the temperature rise of the shadow mask, in accordance with the support function of the metal frame 7. Since it was necessary to have a temperature compensation function, a bimetal structure was used,
In the color cathode ray tube of the present invention, only the supporting function of the metal frame 7 is required, so that the structure can be greatly simplified.

FIG. 3 similarly shows a horizontal sectional view of the color cathode ray tube 1 of the present invention and a partially enlarged view thereof. As described above, since the slit-shaped grill 6 is pulled in the vertical direction of the image screen, that is, in the direction perpendicular to the paper surface, its cross-sectional shape is a straight line, but it is not pulled in the horizontal direction. The shape can take an arbitrary curve. In the enlarged view of the B diagram of this figure, the phosphor screen 5 formed on the surface of the transparent substrate 19 and including the black matrix layer 20, the RGB three-color phosphor layer 21, the aluminum back layer 22, and the like is shown. The RGB three-color phosphor layer 21 has an elongated striped structure continuous in the direction perpendicular to the paper surface. Further, the slit-shaped grill 6 has a long slit-shaped opening 26 continuous in the direction perpendicular to the paper surface.

When forming the phosphor screen 5 composed of the black matrix layer 20 and the RGB three-color phosphor layer 21 on the transparent substrate 19, in the case of the present invention, a printing method simplifies the process as described later. It is preferable in order to achieve When the fluorescent screen 5 is formed by the printing method, the transparent substrate 19 is in a flat state, and the black matrix layer 20, RGB 3
The color phosphor layer 21 is printed, and then the transparent substrate 19 on which the phosphor screen 5 is formed is bent along the transparent substrate supporting surface of the metal frame 7 and bonded and fixed onto the metal frame 7. Therefore, the transparent substrate 19 needs to have a considerable elasticity. When a glass plate is used as the transparent substrate 19, it is necessary to reduce its thickness in order to provide elasticity. However, if the thickness is too thin, a problem will occur in terms of mechanical strength of the transparent substrate 19. In this case, there is a relationship between the size of the fluorescent screen 5 and the optimum thickness of the glass plate, and when the size of the fluorescent screen 5 is 10 ″ or less, approximately 50 μm to 100 μm, 1
In case of 0 "to 25", it is approximately 100μm to 250μ
m, 25 "or more, approximately 250 μm to 500 μm
It has been experimentally found that a thickness of m is preferred.

When the black matrix layer 20 and the three-color phosphor layer 21 are formed on the transparent substrate 19 as described above, a printing method is used in the present invention as described later. Since it is easier to print on the flat surface of the transparent substrate 19 in the printing step, as described above, after printing in the flat state, the fluorescent surface 5 is formed along the shape of the transparent substrate supporting surface of the metal frame 7. The transparent substrate 19 on which is formed is bent and bonded and fixed to the metal frame 7. At this time, it is easier to mount the transparent substrate 19 to the shape of the transparent substrate supporting surface of the metal frame 7 in advance and to mount the transparent substrate 19 on the metal frame 7 more easily. Since stress does not remain on the transparent substrate 19 after the joining and fixing to the substrate supporting surface, it is preferable from the viewpoint of reliability of the joining and fixing portion.

FIG. 10 shows a method for bending and molding the transparent substrate 19 on which such a fluorescent screen 5 is formed. First, as shown in (a), a black matrix layer 20, a three-color phosphor layer 21, etc. are formed on a flat glass transparent substrate 19 by a printing method described later, and then an aluminum back layer 22 is formed. It is formed by a vacuum vapor deposition method or the like. Thereafter, as shown in (b), the glass transparent substrate 19 on which the fluorescent screen 5 is formed is placed on the heating molding table 76, and the glass transparent substrate 19 is heated by the heater 77 built in the heating molding table 76. I do. Normal glass has a strain point (about 5
It gradually becomes softer when the temperature is raised above 00 ° C. Therefore, when the surface shape of the heat molding table 76 is processed into a desired shape in advance, the glass transparent substrate 19 bends along the surface shape of the heat molding table 76 as shown in the figure. After that, if the glass transparent substrate 19 is cooled,
As shown in (c), the glass transparent substrate 19 having a desired curved surface shape can be obtained. Although glass has been described above as the material of the transparent substrate 19, the present invention is not limited to this, and other materials such as plastics can be formed by the same method.

Example 2. In the conventional color cathode ray tube 27, the funnel 8 of the glass bulb as the vacuum envelope is used.
Although a relatively low cost lead (Pb) -added glass was used as an X-ray protection measure for the panel 2, the panel 2 has a problem of a coloring phenomenon (browning phenomenon) on the glass surface due to an electron beam, and thus lead (Pb) -added glass is used. Cannot be used. This browning phenomenon began to become a problem with the operation of high voltage and high current of color cathode ray tubes, and when high energy electrons hit the glass surface, lead (Pb) ions in the glass are reduced by the electron energy. Lead to metallic lead (Pb), which causes brown coloring on the surface of the glass. In order to alleviate the coloring phenomenon of the glass due to the electron beam, the glass containing strontium (Sr) instead of the lead-free glass is a panel of the color cathode ray tube.
Is currently commonly used.

When strontium (Sr) is added to the glass, it is added in the form of an oxide.
b) It is considerably more expensive than in the case of addition, and if the thermal properties of the glass material of lead (Pb), which is the glass material of the funnel 8, are not matched, frit glass 1 will be used later.
If 0, there is a risk of causing a reliability problem due to a difference in thermal expansion when joining the two. For this reason, the glass material of the strontium (Sr) -added panel 2 requires delicate control from the technical point of view. In the color cathode ray tube 1 according to the present invention, the fluorescent screen 5 is provided on the face plate portion 3 of the panel 2.
Since it is separated from the inner surface and formed on another transparent substrate 19, the surface of the face plate portion 3 of the panel 2 is not directly exposed to the electron beam.

Therefore, in the case of the present embodiment, as the material of the panel 2, instead of the relatively expensive strontium (Sr) -added glass, the same lead (Pb) -added glass as the material of the funnel 8 is used. Is. in this case,
Since the panel 2 and the funnel 8 are made of the same material, there is no problem in reliability due to the difference between the materials as described above. In addition, since the raw materials can be unified when the panel 2 and the funnel 8 are produced, it is preferable from the viewpoint of the productivity of the panel 2 and the funnel 8 and the cost can be further reduced. Further, in this case, as the material of the transparent substrate 19 forming the phosphor screen 5, it is necessary to use lead-free glass containing no lead (Pb) added in order to alleviate the coloring phenomenon (browning phenomenon) caused by the electron beam. However, since the X-ray protection is performed by the lead-added panel 2 on the front surface, it is not necessary to use an expensive material such as strontium (Sr), and it is possible to use an ordinary inexpensive glass material.

Further, in the conventional color cathode ray tube 27, for the purpose of improving the contrast of an image, a coloring metal ion such as manganese (Mn) or cobalt (Co) is added to the glass material of the panel 2 to make the glass. It is possible to effectively remove the external light during the operation of the color cathode ray tube by controlling the optical transmittance of the. On the other hand, with respect to the funnel 8, there is no such optical constraint condition, and therefore coloring metal ions such as manganese (Mn) and cobalt (Co) are not added to the glass material. As mentioned above, Panel 2
In terms of productivity and cost of the funnel 8 and the funnel 8, it is desirable to use the same material for both, and in this embodiment,
From the glass material of the panel 2, not only strontium (Sr) as described above but also colored metal ions such as manganese (Mn) and cobalt (Co) are extracted, and lead (P
b) was added to make the material the same as that of the conventional funnel 8. Instead, manganese (Mn), cobalt (Co) or the like is added to the glass material of the transparent substrate 19 forming the fluorescent screen 5 for the purpose of effectively removing external light and increasing the contrast of the image during operation of the color cathode ray tube. The control of the light transmittance is performed by adding the colored metal ion of.

Example 3. FIG. 4 shows another embodiment of the present invention, and is a partially enlarged view of a vertical sectional view of the color cathode ray tube 1 of the present invention. In this case, a slide groove 66 is provided in the metal frame 7 that holds the transparent substrate 19 that constitutes the fluorescent screen 5, and the transparent substrate 19 is placed in the slide groove 66.
Is moved while sliding, so that the geometrical positional relationship between the fluorescent screen 5 and the slit-shaped grill 6 is matched. By this slide method, the adjustment work of the geometrical positional relationship between the two becomes very simple. After that, after the geometrical positional relationship between the two is matched, the transparent substrate 19 is adhered and fixed to the metal frame 7 by the conductive frit glass 23 in the same manner as described above.

Example 4. FIG. 11 is a view for explaining a method of fixing the transparent substrate 19 on which the fluorescent screen 5 is formed to the geometrical positional relationship with the slit-shaped grill 6 and adhering and fixing it to the metal frame 7 with the conductive frit glass 23. It is a figure. The vertical cross section and the horizontal cross section of the metal frame 7 are shown in contrast to each other on the left and right. First, the metal frame 7 is prepared, and the slit-shaped grill 6 is spread-welded to the metal frame 7 as described above. In this case, tension (tensile stress) is applied to the slit-shaped grill 6 in the vertical direction.
While applying, the slit-shaped grill 6 is fixed to the metal frame 7 with a seam solution or the like. Next, the camera
The position of a predetermined hole of the slit-shaped grill 6 is read by the sensor 43. As described below, the transparent substrate 19 on which the fluorescent surface 5 is formed is placed on the supporting surface of the transparent substrate 19 of the metal frame 7 with the side on which the fluorescent surface 5 is not formed facing the camera sensor 43 side. Aligning while watching the image of the camera sensor 43 so that the opening of the corresponding black matrix layer 20 on the phosphor screen 5 is aligned with the position of the predetermined hole of the slit-shaped grill 6 read by the sensor 43. I do. When the alignment in the central portion is completed, the transparent substrate 19 is placed along the metal frame 7, and the conductive frit glass 23 previously applied to the supporting surface of the transparent substrate 19 of the metal frame 7 is transferred to the transparent substrate 1 as shown in FIG.
The transparent substrate 19 is temporarily fixed by the transparent substrate pressing jig 44 so as to come into contact with the transparent substrate 19. 400 ℃ in this state
When the heat treatment is carried out at a temperature of up to 450 ° C., the conductive frit glass 23 is melted and crystallized, and the transparent substrate 19 having the fluorescent screen 5 formed on the metal frame 7 is completely bonded and fixed.

Example 5. FIG. 5 shows another embodiment of the present invention, and is a partially enlarged view of a vertical sectional view of the color cathode ray tube 1 of the present invention. During operation of the completed color cathode ray tube, the energy of the electron beam impinging on the fluorescent screen 5 causes the temperature of the transparent substrate 19 constituting the fluorescent screen 5 to rise, causing thermal expansion of the transparent substrate 19. If the metal frame 7 expands in accordance with the dimensional change due to the thermal expansion of the transparent substrate 19, the transparent substrate 19 will not loosen, but normally the temperature increase of the metal frame 7 is more transparent.
Since the temperature rises later than the temperature rise of 9, the slack may occur and the emission of light from the phosphor screen 5 may be adversely affected such as color shift. Therefore, the transparent substrate 19 due to thermal expansion when the temperature of the transparent substrate 19 rises
In this embodiment, the transparent substrate 1
The structure is such that the dimensional change can be absorbed in the end direction of the transparent substrate 19 without fixing 9 to the metal frame 7.

In the case of this embodiment, first, similarly to the above, the geometrical positional relationship between the fluorescent screen 5 and the slit-shaped grill 6 was adjusted by finely adjusting the position of the transparent substrate 19 constituting the fluorescent screen 5. After that, the transparent substrate 19 is mechanically pressed by the pressing plate 45 through the elastic member 46 for pressing the transparent substrate to fix it on the metal frame 7. At this time, the pressing plate 45 is fixed to the metal frame 7 by a method such as spot welding or screwing. A metal spring or the like is used as the elastic body 46 for pressing the transparent substrate. In this case, the inner diameter of the portion of the metal frame 7 to which the transparent substrate 19 is attached is made slightly larger than the outer diameter of the transparent substrate 19 so as to form the gap g. The transparent substrate 19 is simply mechanically pressed without being fixed by adhesion to the conductive frit glass.
It is possible to escape the dimensional change of the transparent substrate 19 due to thermal expansion when the temperature of the transparent substrate 9 rises, and it is possible to prevent color deviation of the light emission of the fluorescent screen 5 due to slack of the transparent substrate 19 or the like. At this time, since the fluorescent screen 5 cannot be electrically connected through the conductive frit glass, the conductive matrix 24 directly connects the fluorescent matrix 5 to the black matrix layer 20 or the aluminum back layer 22. Electrical continuity is established.

Example 6. FIG. 7 is a diagram showing a printing method for directly forming the fluorescent surface 5 of the color cathode ray tube of the present invention on the transparent substrate 19 by a printing method. In this case, a case will be described where screen printing is used as the printing method, but various printing methods can be applied. First, the flat transparent substrate 19 is set at a fixed position of the screen printing machine 78.
Next, a printing plate 41 having a mesh screen having a pattern of printing ink passing portions and non-passing portions on the surface thereof is set on the screen frame 40 by accurately aligning it with the transparent substrate 19. After that, an appropriate amount of the printing ink 42 is placed on the printing plate 41, the printing plate 41 is pressed against the transparent substrate 19 by the printing squeegee 39, and the printing ink 42 is evenly spread to clear the ink passage portion. Printing is performed by extruding onto the substrate 19. As the printing ink 42, when printing the black matrix layer 20, for example, graphite paste is kneaded with an organic paste to have an appropriate viscosity. Similarly, at the time of printing the phosphor layer, an organic paste in which phosphor particles of a desired color are kneaded to have an appropriate viscosity is used. Such a structure of the fluorescent screen by the printing method is made possible by using the flat transparent substrate 19 as in the present invention, and the panel 2 forming the conventional fluorescent screen is used.
In such cases, it is impossible due to a shape problem.

FIG. 6 shows the fluorescent screen 5 according to the direct printing method described above.
It shows the manufacturing process of. First, the black matrix layer printing plate is accurately aligned with the transparent substrate 19, and then screen printing is performed using a black matrix layer printing ink composed of a kneaded material of organic pesto and graphite particles. As described above, the black matrix layer 20 is formed on the transparent substrate 19. Further, the G (green) phosphor layer printing plate is similarly printed on the transparent substrate 19 on which the black matrix layer 20 is completely printed.
When the ink is printed accurately using the G (green) phosphor layer printing ink consisting of a kneaded mixture of organic pesto and G (green) phosphor particles, it is as follows. , G (green) in a predetermined opening of the black matrix layer 20 provided on the transparent substrate 19.
The formation of the phosphor layer is completed. After that, similarly, screen printing of the B phosphor layer and the R phosphor layer is performed in the same manner, and the formation of the RGB three-color phosphor layer 21 is completed.

The formation of a contrast enhancement filter layer, which is also provided on the transparent substrate 19 as will be described later, can be performed by a similar screen printing method. In the case of forming a fluorescent screen by such a direct printing method, the manufacturing process is greatly simplified as compared with the conventional photoengraving method, and the required capital investment is significantly small. It is possible to significantly reduce the cost. In addition, the space required for manufacturing can be greatly reduced.

Example 7. 8 and 9 are views for explaining the formation of the fluorescent screen by the transfer method capable of further improving the productivity. This method is also a kind of printing method, but unlike the above-mentioned direct printing method, instead of directly printing on the transparent substrate 19, the fluorescent surface is once printed on a film having good printability such as a polyester film. After that, it is transferred onto the transparent substrate 19 by heating or the like. FIG. 8 is a diagram for explaining the printing process of the fluorescent screen on the base film 68. First, the base film 6 from the base film supply roll 69 such as polyester
8 is supplied, and by screen printing, (a) G (green) phosphor layer and (b) on the base film 68 in sequence.
B (blue) phosphor layer, (c) R (red) phosphor layer,
(D) A black matrix layer or the like is laminated and printed while being aligned, and when each printing is completed, it is wound up on a print completion winding roll 70, and the base film 6 is formed.
8 Printing on top is completed. At this time, in actuality, in order to smoothly perform the subsequent transfer, (a) the release layer is printed before the G (green) phosphor layer is printed, and (d) after the black matrix layer is printed. , Print the adhesive layer. Therefore, in the case of the above example, the actual printing process is six processes.

FIG. 9 is a diagram for explaining a process of transferring the fluorescent screen, which has been printed on the base film 68, onto the transparent substrate 19. The printing completion take-up roll 70 that has completed printing on the fluorescent surface is attached to the transfer device 79 so that the printing surface side of the film faces the transparent substrate side. afterwards,
After supplying the transparent substrate 19 for forming the fluorescent screen of the transfer device 79 and accurately aligning the fluorescent screen printed on the base film 68 with the transparent substrate 19, the heater 7 is used.
When the transfer heating press 71 having the built-in 3 is pressed from the surface of the base film 68 opposite to the surface on which the fluorescent surface is formed, the fluorescent surface on the base film 68 is transferred onto the transparent substrate 19 by heating, and then black on the transparent substrate 19.・ Matrix layer 20
And the phosphor screen of the RGB three-color phosphor layer 21 is formed. The base film 68 after transfer is wound up by a winding roll 72. Further, when a contrast enhancing filter layer is added to the fluorescent screen which is also provided on the transparent substrate 19 as described later, the same transfer method can be used. In the case of forming a fluorescent screen by such a transfer method,
Since the fluorescent screen is printed on a roll-shaped film, it has excellent printability, and since continuous printing is possible, the process can be further simplified. It is also possible to increase the printing speed. Therefore, the manufacturing cost of the phosphor screen can be further reduced.

Example 8. FIG. 12 shows another embodiment of the color cathode ray tube 1 of the present invention, and shows a vertical sectional view and a partially enlarged view thereof. In the embodiments described so far, the metal frame 7 was an integral body from the beginning, but in the present embodiment, initially, the shadow mask, that is, the supporting portion [mask supporting metal frame 33] of the slit-shaped grill 6 and the fluorescent screen. 5, the supporting portion of the transparent substrate 19 [transparent substrate supporting metal frame 3
2] and a separate metal frame, and after accurately matching the geometrical positional relationship between the two, the frame joint plate 4
A metal frame 7 is formed by joining and integrating with each other. As described above, it is better to fix the slit-shaped grill 6 and the transparent substrate 19 that constitutes the fluorescent screen 5 to another metal frame body first, and then to join both frame bodies together in the slit-shape during the manufacturing process. The transparent substrate 19 forming the grill 6 and the fluorescent screen 5 is easy to handle, which is preferable from the viewpoint of mass productivity of the shadow mask * phosphor screen structure 18.

FIG. 13 shows such a supporting portion of the transparent substrate 19 constituting the fluorescent screen 5 [transparent substrate supporting metal frame 32].
And shadow mask support [mask support metal frame 3
3] and 3) are formed by separate metal frames, and the geometrical positional relationship between the two is accurately adjusted later, and then the frames are joined and integrated by a frame joining plate 47 to form a metal frame 7. -Mask * The manufacturing method of the phosphor screen structure 18 will be described.

In the figure, the left side in the one-dot chain line frame is a vertical sectional view, and the right side is a horizontal sectional view. First, the mask supporting metal frame body 33 is prepared as shown in (a), and then the mask supporting metal frame body 33 is subjected to seam welding or the like while applying a constant tension (tensile stress) to the slit-shaped grill 6 as shown in (c). Fix it. Further, as shown in (b), the transparent substrate supporting metal frame 32 is prepared, and then, as shown in (d), the transparent substrate 19 on which the fluorescent screen 5 is completed is formed by the printing method or the like. The transparent substrate 19 is attached to the supporting metal frame 32, and the transparent substrate 19 is fixed to the transparent substrate supporting metal frame 32 by the same method as described above. In this way
The two frames thus completed are stacked as shown in (e), and the geometrical positional relationship between the two is accurately adjusted using the camera sensor 43 in the same manner as described above. After that, both are joined and fixed by spot welding or the like by the frame joining plate 47 to be integrated as the metal frame 7.

Example 9. FIG. 14 shows another embodiment of the present invention and is a partially enlarged view of a vertical sectional view of the color cathode ray tube 1 of the present invention. In the case of this embodiment, the eighth embodiment. Like the metal frame, the metal frame is a transparent substrate supporting metal frame 32.
And a mask supporting metal frame 33, but they are not joined and fixed by a frame joining plate, but a bimetal 67 is interposed between them and the two are joined and fixed by this bimetal 67. . During operation of the completed color cathode ray tube, the energy when the electron beam impinges on the phosphor screen 5 causes a dimensional change or the like due to thermal expansion of the transparent substrate 19 forming the phosphor screen 5, resulting in a color shift or the like of the phosphor screen 5. Is sensed as a temperature rise by the bimetal 67, and the compensating action of the bimetal 67 is used to adjust the spacing between the two metal frames, that is, the spacing between the slit-shaped grill 6 and the fluorescent screen 5 to adjust the electron beam The landing state on the phosphor screen 5 is corrected to correct the color shift defect of the phosphor screen 5. This bimetal 67 is made by laminating a high expansion metal plate and a low expansion metal plate, and by utilizing the fact that a warp occurs with a change in temperature, the space between the two metal frames, that is, the slit-shaped grill 6 and the fluorescent screen 5 are used. The distance between and is automatically adjusted.

Example 10. FIG. 15 shows another embodiment of the present invention, which is a shadow mask * phosphor screen structure 1
8 shows a partial sectional shape of No. 8. Also in the case of the present embodiment, Embodiment 8. And 9. Similarly, after fixing the transparent substrate 19 having the fluorescent surface 5 on the transparent substrate supporting metal frame 32 and the slit-shaped grill 6 on the mask supporting metal frame 33, respectively,
The geometrical positional relationship between the two is accurately matched, and the two are joined and fixed by one or more pairs of joining supports 75. The joining of the two metal frames by the joining support 75 has a flexible structure so that the end of the transparent substrate supporting metal frame 32 can be freely changed at the end of the transparent substrate supporting metal frame 32. In addition, it is preferable to perform it in the vicinity of the long side middle portion of each metal frame. In this case, the transparent substrate supporting metal frame 32 has a frame itself made of a bimetal.
When the temperature of the transparent substrate 19 which constitutes the above is raised, the heat is transmitted to the transparent substrate supporting metal frame body 32, and by the action of the bimetal of the transparent substrate supporting metal frame body 32, the joining support body 75 is fulcrumed as shown in the figure. Then, the transparent substrate supporting metal frame 32 is warped, and the space between the two frames at the periphery of the frame,
That is, the gap between the slit-shaped grill 6 and the fluorescent screen 5 is adjusted to correct the landing state of the electron beam 74 on the fluorescent screen 5, thereby correcting a defect such as a color shift of the fluorescent screen 5.

Example 11. FIG. 16 shows another embodiment of the color cathode ray tube 1 of the present invention, which is a vertical sectional view and a partially enlarged view thereof. As in the present invention, the phosphor screen 5
To form the transparent substrate 19 on the glass bulb panel 2
When provided separately from the above, a drawback is that the number of external light reflecting surfaces is structurally increased by two as compared with the conventional color cathode ray tube 27. Generally, the reflection of light at the interfaces of glass-air (vacuum) and air (vacuum) -glass is about 4%, and the increase of two reflecting surfaces as in the present invention has a considerably large effect. For example, due to the influence of reflection of external light, the image displayed on the screen becomes very difficult to see. As a countermeasure against this, in the present embodiment, the surface reflection reducing optical films 31 are provided on the inner and outer surfaces of the face plate portion 3 of the glass bubble panel 3 and the outer surface of the transparent substrate 19 constituting the fluorescent surface 5 on the panel 2 side in total. Is provided.

Such a surface reflection reducing optical film 31 is formed by alternately stacking a high refractive index material such as titanium oxide (TiO ₂ ) and a low refractive index material such as silicon dioxide (SiO ₂ ) with a constant film thickness. It is obtained by By properly selecting the number of layers and materials, it is possible to suppress the surface reflection to 0.5% or less. As a method for forming such an optical film, there is a vacuum deposition method or a wet method in which a solution of an organic metal is applied to a constant film thickness by a spin coating method and then heat-treated to form a film. The latter is slightly inferior in performance, but has the advantage of being very cheap in cost. Further, in order to suppress the surface reflection to the same extent as that of the conventional color cathode ray tube 27, the panel 2 side of the transparent substrate 19 forming the inner and outer surfaces of the face plate portion 3 of the glass bulb panel 2 and the fluorescent surface 5. It has been found that such a surface reflection reducing optical film 31 may be applied to at least two of the three outer surfaces.

Example 12 FIG. 17 shows another embodiment of the color cathode ray tube 1 of the present invention, and shows a vertical sectional view and a partially enlarged view thereof. Recently, as a method for reducing the weight of the color cathode ray tube, it has been proposed to form the side wall portion 4 of the glass bulb panel 2 of the color cathode ray tube with a metal. However, this method is as follows: (1) In the joint portion of the metal side wall portion 35 of the composite panel 34 and the frit glass 36 of the face plate portion 3,
As shown in the figure, there is a step, so face plate 3
It is difficult to form a fluorescent screen on the inner surface by a conventional photoengraving method. (2) Since the high voltage applied to the phosphor screen 5 is exposed to the outside from the metal side wall portion 35 of the composite panel 34, it is structurally very dangerous. However, it has not been put to practical use yet because it has very difficult problems such as. This embodiment presents a method of simultaneously solving various problems in reducing the weight of such a glass bulb.

In this embodiment, the conventional glass panel 2 is used.
Instead, a composite panel 34 consisting of a metal side wall portion 35 and a glass face plate portion 3 is used. The frit glass 36 joins the metal side wall portion 35 and the glass face plate portion 3 together. Further, at a fixed position on the inner surface of the metal side wall portion 35, a ceramics pin 37 is provided instead of the conventional metal pin 15 as a frit for pin adhesion.
It is adhered by glass 38. Other structures are the same as those in the first embodiment. This is exactly the same as that of the color cathode ray tube 1 of the present invention described in 1. In the case of such a structure, since the fluorescent screen 5 is not formed on the inner surface of the composite panel 34, the above-described difficulty in forming the fluorescent screen does not occur.

The structure of the shadow mask * phosphor screen structure 18 is exactly the same as that of each of the above-described embodiments of the present invention, and the phosphor screen 5 is printed on the transparent substrate 19 by the black matrix layers 20, 3 by a printing method. This is performed by forming the color phosphor layer 21 and the like. The shadow mask * phosphor screen structure 18 has a support spring 1 whose one end is welded to the metal frame 7.
4 is suspended by a ceramics pin 37. Further, since the insulating ceramic pin 37 insulates the support spring 14 of the metal frame 7 and the metal side wall portion 35 from each other, the high voltage which is a drawback when using the composite panel 34 as described above. There is no problem of exposure. The composite panel 34 is joined to the funnel 8 by the frit glass 10 as in the conventional case. In order to successfully perform the three-point joining of the metal side wall portion 35 and the funnel 8, the metal side wall portion 35 and the face plate portion 3, and the metal side wall portion 35 and the ceramic pin 37. It is necessary to match the thermophysical property values of these materials, and as the material of the metal side wall portion 35, the Kovar material (2
8% Ni-17% Cr-iron alloy) is similar to the thermal expansion characteristics of glass and ceramics, including the inflection point,
Optimal.

Example 13 FIG. 18 shows another embodiment of the color cathode ray tube 1 of the present invention, and is a partially enlarged sectional view in the horizontal direction. In this embodiment, in order to improve the contrast performance of the phosphor screen 5, the RGB tricolor phosphor layer 21 is formed between the RGB tricolor phosphor layer 21 of the phosphor screen 5 formed on the transparent substrate 19 and the transparent substrate 19. A contrast enhancing filter layer (48 to 50) made of an inorganic material having optical characteristics corresponding to the emission characteristics of each phosphor layer was provided. This contrast enhancement filter layer (48-50)
Has an optical characteristic of transmitting the emitted light from the phosphor layer as much as possible and absorbing as much external light as possible. For each of the RGB three-color phosphor layers 21, Apply a filter layer with different transmittance characteristics. Further, as the material of the contrast enhancing filter layer (48 to 50), there is a possibility that the organic material may deteriorate due to the heat treatment process of 3 to 4 times at 350 to 450 ° C. in the manufacturing process of the color cathode ray tube. Inorganic materials are used because they exist.

FIG. 19 shows a contrast enhancing filter layer (48 to 50) and an RGB three-color phosphor layer 21 by a printing method.
FIG. 6 is a diagram for explaining a process of forming a. First,
As described above, the black matrix layer 20 is formed on the transparent substrate 19 by the same screen printing method as described above. As described below, the G (green) contrast enhancement filter layer 49 is printed in advance at the position where the G (green) phosphor layer is provided in the subsequent printing. The printing ink at this time is G
It is a mixture of (green) pigment and paste. After that, similarly, the B (blue) contrast enhancement filter layer 50 and the R (red) contrast enhancement filter layer 48 are printed in the same manner. After this, the contrast enhancing filter layers (48-50) for each color are formed as in the previous embodiment.
From the top, the RGB three-color phosphor layer 21
Are sequentially printed to complete the printing of the fluorescent screen.

Example 14 Example 13 above. In the printing method of No. 2, the black matrix layer 2 is formed on the transparent substrate 19.
0, the contrast enhancement filter layer (48 to 50) and the RGB three-color phosphor layer 21 are overlaid and printed, so that the total thickness of the printing becomes very thick.
In practice, it is necessary to form the aluminum back layer 22 on top of this, which may cause a problem in the vacuum deposition property. As a countermeasure against this, in this embodiment, as shown in FIG. 20, the black matrix layer 20 and the contrast enhancing filter layers (48 to 50) are provided on the side opposite to the surface of the transparent substrate 19 on which the RGB three-color phosphor layer 21 is provided. It is provided on the surface.

The RGB three-color phosphor layer 21 must be provided on the electron gun side because it is necessary to be excited and emitted by an electron beam, but the black matrix layer 20 and the contrast enhancement filter layers (48 to 50) are required. , The transparent substrate 19 is very thin (50 to 500
Since there is almost no adverse effect due to parallax, there is no problem even if it is provided on the surface opposite to the RGB three-color phosphor layer 21. In this embodiment, the black matrix layer 20 and the contrast enhancing filter layer (48-5
Both of 0) are provided on the surface opposite to the RGB three-color phosphor layer 21, but the present invention is not limited to this, and only one of them is the surface opposite to the RGB three-color phosphor layer 21. May be provided.

In FIG. 20, the RGB three-color phosphor layer 21, the black matrix layer 20 and the contrast enhancement filter layer (48) are formed on both sides of the transparent substrate 19 by a printing method.
50 to 50) is a figure for demonstrating the process of forming. First, as described above, the RGB three-color phosphor layer 21 is formed on the transparent substrate 19 by the same screen printing method as described above. Next, transparent substrate 1
The black matrix layer 20 is formed on the surface opposite to the surface on which the RGB three-color phosphor layer 21 of 9 is provided by a similar method such as screen printing. After that, like the above,
As described above, the contrast enhancement filter layers (48 to 50) are sequentially printed by a method such as screen printing to complete the printing of the fluorescent screen.

Example 15 FIG. 22 shows another embodiment of the color cathode ray tube 1 of the present invention, which is a horizontal sectional view and a partially enlarged view thereof. Color cathode ray tube 1 of the present invention
With respect to the shadow mask and the fluorescent screen, the horizontal section of the image screen can be formed by an arbitrary curve, but the vertical section is a straight line. Therefore, there are great constraints on the design of the color cathode ray tube. In a normal color cathode ray tube, if the magnetic field distribution of the deflection yoke 51 is determined, the arrangement state of the three electron beams emitted from the electron gun 9 on the fluorescent screen 5 after passing through the shadow mask hole is determined. Since it is desirable that the electron beams are arranged at equal intervals on the phosphor screen 5, conventionally, the curved surface of the shadow mask is mainly modified to arrange the electron beams on the phosphor screen 5 after passing through the shadow mask hole. Were equalized. This corrects the distance between the shadow mask and the phosphor screen to equalize the alignment of electron beams on the phosphor screen 5 after passing through the shadow mask. The same effect can be obtained by touching the curved surface of the phosphor screen 5. However, in the case of the color cathode ray tube 1 of the present invention, as described above, both the shadow mask and the fluorescent screen are straight lines in the vertical direction of the image screen, so that the arrangement state of the electron beams is changed at an arbitrary position in the vertical direction. Things are impossible. Since both the shadow mask and the phosphor screen can have arbitrary curves in the horizontal direction, the arrangement of the electron beams on the phosphor screen can be easily corrected.

Therefore, in the case of the color cathode ray tube 1 of the present invention,
Some means is needed to correct the beam alignment on the phosphor screen with respect to the vertical direction of the video screen. In order to make such a correction, the deflection yoke 51 is used in this embodiment.
A sub-yoke 53 is installed at the entrance portion of the shadow mask hole from which a magnetic field is applied in synchronization with at least vertical deflection to change the distance between the three electron beams on the deflection surface 52. The arrangement of the electron beams after passing through on the fluorescent screen is changed.

A sectional view of the portion of the sub-yoke 53 in a direction perpendicular to the plane of the drawing is shown in a lower portion H sectional view. In the color cathode ray tube 1 of the present embodiment, the electron gun 9 built in the neck portion 12
Side beams 55 and 56 of the cup portion 13 at the top of the
A pole piece 54 is installed at the exit of (the beam on both sides of the three electron beams), and the magnetic field from the external electromagnetic coil 58 is passed by the pole piece 54 to the side.
Guide beams 55 and 56 vertically across. In this case, the electron beam moves by receiving a horizontal force as shown in the figure. Therefore, the external electromagnetic coil 5 is synchronized with the vertical deflection.
Since the center beam 57 does not move when the current passed through 8 is changed, the interval of each electron beam with respect to the center beam 57 on the deflecting surface 52 can be changed. As a result, it is possible to freely change the arrangement of electron beams on the fluorescent screen after passing through the shadow mask holes.

[0071]

As described above, according to the present invention, since the fluorescent screen of the color cathode ray tube and the shadow mask are integrated with each other, it is possible to prevent the shadow screen from being handled by heat treatment or the like during the manufacturing process of the color cathode ray tube. Even if the mask surface and the frame and supporting springs supporting it are mechanically and thermally deformed, the shadow mask and the fluorescent surface change integrally, so that there is no color shift during operation after the completion of the color cathode ray tube. It is possible to obtain a high-quality color cathode ray tube with less inconvenience.

Further, according to the present invention, since the fluorescent screen is separated from the inner surface of the face plate portion of the panel of the color cathode ray tube and formed on another transparent substrate, a relatively low cost lead-added glass is used as the material of the panel. As a result, it can be used and the cost of the color cathode ray tube can be reduced.

Further, according to the present invention, since the fluorescent screen is separated from the inner surface of the face plate portion of the panel of the color cathode ray tube and formed on another transparent substrate, the printing method of the fluorescent screen can be applied. The manufacturing cost of the cathode ray tube can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing the structure of a color cathode ray tube according to the present invention.

FIG. 2 is a vertical sectional view and a partially enlarged view of a color cathode ray tube according to the present invention.

FIG. 3 is a horizontal sectional view and a partially enlarged view of a color cathode ray tube according to the present invention.

FIG. 4 is a view showing another embodiment of the present invention, which is a vertical sectional view and a partially enlarged view of the present invention.

FIG. 5 is a view showing another embodiment of the present invention, which is a vertical sectional view and a partially enlarged view of the present invention.

FIG. 6 is a diagram showing a manufacturing process of a fluorescent screen by a direct printing method.

FIG. 7 is a diagram showing a method for forming a fluorescent screen of a color cathode ray tube of the present invention by a direct printing method.

FIG. 8 is a diagram illustrating a step of printing a phosphor screen on a base film.

FIG. 9 is an explanatory diagram of a process of transferring a fluorescent screen, which has been printed on a base film, onto a transparent substrate.

FIG. 10 is a diagram showing a method of bending and forming a transparent substrate on which a fluorescent screen is formed.

FIG. 11 is a diagram showing a method of aligning the fluorescent screen and the slit-shaped grill and fixing them to the metal frame.

FIG. 12 is a view showing another embodiment of the present invention and is a vertical sectional view of a color cathode ray tube of the present invention.

FIG. 13 is a diagram showing a method of aligning and joining a transparent substrate support and a shadow mask support metal frame.

FIG. 14 is a view showing another embodiment of the present invention and is a vertical sectional view of a color cathode ray tube of the present invention.

FIG. 15 shows another embodiment of the present invention.
It is a partial cross section figure of a mask * phosphor screen structure.

FIG. 16 is a view showing another embodiment of the present invention and is a vertical sectional view of a color cathode ray tube of the present invention.

FIG. 17 is a view showing another embodiment of the present invention and is a vertical sectional view of a color cathode ray tube of the present invention.

FIG. 18 is a view showing another embodiment of the present invention and is a horizontal sectional view of a color cathode ray tube of the present invention.

FIG. 19 is a diagram of forming a contrast enhancement filter layer and an RGB three-color phosphor layer by a printing method.

FIG. 20 is a diagram in which a filter layer and RGB three-color phosphor layers are formed on both surfaces of a transparent substrate by a printing method.

FIG. 21 is a process drawing of forming a filter layer, a phosphor layer, and the like on both surfaces of a transparent substrate by a printing method.

FIG. 22 is a view showing another embodiment of the present invention and is a horizontal sectional view of a color cathode ray tube of the present invention.

FIG. 23 is a diagram showing a structure of a conventional color cathode ray tube.

FIG. 24 is a horizontal sectional view of a conventional color cathode ray tube and a partially enlarged view thereof.

FIG. 25 is a horizontal sectional view of a conventional color cathode ray tube and a partially enlarged view thereof.

FIG. 26 is a diagram showing a process of a structure of a phosphor screen of a conventional color cathode ray tube.

FIG. 27 is a schematic cross-sectional view of an exposure device for a phosphor screen of a color cathode ray tube.

[Explanation of symbols]

 1 Color Cathode Ray Tube of the Present Invention 2 Panel 3 Face Plate Part 4 Sidewall Part 5 Fluorescent Surface 6 Slit-shaped Grill 7 Metal Frame 8 Funnel 9 Electron Gun 10 Frit Glass 11 Anode Button 12 Neck Part 13 Cup Part 14 Support Spring 15 Metal Pin 16 Conduction Spring 17 Internal Conductive Film 18 Shadow Mask * Phosphor Screen Structure 19 Transparent Substrate 20 Black Matrix Layer 21 RGB Three Color Phosphor Layer 22 Aluminum Back Layer 23 Conductive Frit Glass 24 Conductive Paint 25 Internal Magnetic shield 26 Slit-shaped opening 27 Conventional color cathode ray tube 28 Slot-type shadow mask 29 Slot-shaped hole 30 Pin conduction film 31 Surface reflection reducing optical film 32 Transparent substrate supporting metal frame 33 Mask supporting metal frame 34 Composite panel 35 Metal Side Wall 36 Frit glass 37 Ceramic pin 38 Frit glass for pin bonding 39 Squeegee for printing 40 Screen frame 41 Printing plate 42 Printing ink 43 Camera sensor 44 Transparent substrate holding jig 45 Holding plate 46 Transparent substrate holding elastic body 47 Frame joining plate 48 R contrast enhancement filter layer 49 G contrast enhancement filter layer 50 B contrast enhancement filter layer 51 deflection yoke 52 deflection surface 53 sub-yoke 54 pole piece 55 side beam 56 side beam 57 center beam 58 external electromagnetic coil 59 Photosensitive Material 60 Exposure Device 61 Main Lens 62 Auxiliary Lens 63 Light Control Filter 64 Exposure Light Source 65 Stopper 66 Slide Groove 67 Bimetal 68 Base Film 69 Base Film Film supply roll 70 Take-up roll 71 Transfer heating press 72 Take-up roll 73 Heater 74 Electron beam 75 Bonding support 76 Heat-forming stand 77 Heater 78 Screen printer

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[Procedure amendment]

[Submission date] September 10, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0047

[Correction method] Change

[Correction content]

In the case of this embodiment, first, similarly to the above, the geometrical positional relationship between the fluorescent screen 5 and the slit-shaped grill 6 was adjusted by finely adjusting the position of the transparent substrate 19 constituting the fluorescent screen 5. After that, the transparent substrate 19 is mechanically pressed by the pressing plate 45 through the elastic member 46 for pressing the transparent substrate to fix it on the metal frame 7. At this time, the pressing plate 45 is fixed to the metal frame 7 by a method such as spot welding or screwing. A metal spring or the like is used as the elastic body 46 for pressing the transparent substrate. In this case, the inner diameter of the portion of the metal frame 7 to which the transparent substrate 19 is attached is made slightly larger than the outer diameter of the transparent substrate 19 so as to form the gap g. The transparent substrate 19 is simply mechanically pressed without being fixed by adhesion to the conductive frit glass.
It is possible to escape the dimensional change of the transparent substrate 19 due to thermal expansion when the temperature of the transparent substrate 9 rises, and it is possible to prevent color deviation of the light emission of the fluorescent screen 5 due to slack of the transparent substrate 19 or the like. At this time, since conduction to the fluorescent screen 5 cannot be achieved through the conductive frit glass , the conductive paint 24 having thermal expansion and contraction allows the fluorescent screen 5 to pass through.
The black matrix layer 20 or the aluminum back layer 22 is directly connected to establish electrical conduction.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0067

[Correction method] Change

[Correction content]

In FIG. 21 , the RGB three-color phosphor layer 21, the black matrix layer 20 and the contrast enhancing filter layer (48) are formed on both sides of the transparent substrate 19 by a printing method.
50 to 50) is a figure for demonstrating the process of forming. First, as described above, the RGB three-color phosphor layer 21 is formed on the transparent substrate 19 by the same screen printing method as described above. Next, transparent substrate 1
The black matrix layer 20 is formed on the surface opposite to the surface on which the RGB three-color phosphor layer 21 of 9 is provided by a similar method such as screen printing. After that, like the above,
As described above, the contrast enhancement filter layers (48 to 50) are sequentially printed by a method such as screen printing to complete the printing of the fluorescent screen.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideo Ikeda 8-1-1 Tsukaguchihonmachi, Amagasaki City Mitsubishi Electric Corporation Material Device Research Center (72) Inventor Murakami 8-1-1 Tsukaguchihonmachi, Amagasaki City Mitsubishi Electric Corporation Material Device Research Center (72) Inventor Mitsuhiro Okumura 8-1-1 Tsukaguchi Honcho, Amagasaki City Mitsubishi Electric Corporation Material Device Research Center (72) Inventor Shuji Iwata 8-1-1 Tsukaguchi Honcho, Amagasaki City MITSUBISHI ELECTRIC CORPORATION Material Devices Research Center

Claims (27)

[Claims] 1. A vacuum envelope of a glass bulb comprising a panel and a funnel, an electron gun disposed in the vacuum envelope for emitting three electron beams, and the vacuum envelope. The shadow mask * phosphor screen structure is provided at a fixed position inside the funnel of the panel and is arranged so as to be close to the inner surface of the face plate part of the panel and to face the electron gun. The structure is a shadow mask consisting of a slit-shaped grill stretched and held in a metal frame so as to have a curved line constituted by a straight line in the vertical direction of the face plate portion and a predetermined curved line in the horizontal direction, The metal frame includes a three-color phosphor layer that is integrally held with the shadow mask at a predetermined interval and emits light by the bombardment of the electron beam that has passed through the shadow mask. Color cathode ray tube, characterized in that it is constituted by a transparent substrate a phosphor screen is formed. 2. A transparent substrate having a thickness of 50 μm to 5
A color cathode ray tube according to claim 1, wherein a glass plate of 00 µm is used. 3. The color according to claim 1 or 2, wherein tension (tensile stress) is applied to the transparent substrate.
Cathode ray tube. 4. The color cathode ray tube according to claim 1, wherein the metal material forming the metal frame and the material forming the transparent substrate have substantially the same thermal expansion coefficient. 5. The color cathode ray tube according to claim 4, wherein a Kovar material is used as the metal frame and a glass material is used as the transparent substrate. 6. The color cathode ray line according to claim 1, wherein the metal frame has a stepwise cross-sectional shape in which the supporting surface of the shadow mask and the supporting surface of the transparent substrate are substantially parallel to each other. tube. 7. The color cathode ray tube according to claim 1, wherein the metal frame and the transparent substrate are joined with a conductive frit glass. 8. The electrical conduction between the anode button provided on the funnel of the glass bubble and the fluorescent surface is controlled by: anode button → internal conductive film → conductive spring → metal frame →
8. A structure in which conductive frit / glass → conductive paint → phosphor screen is used as a path.
The described color cathode ray tube. 9. The transparent substrate is not fixed to the metal frame,
7. A color cathode ray tube according to claim 1, wherein the transparent cathode has a holding structure that allows a dimensional change due to thermal expansion of the transparent substrate to escape. 10. The color cathode ray tube according to claim 9, wherein the transparent substrate is held by a pressing plate via a transparent substrate pressing elastic member and held on a metal frame. 11. The metal frame has a holding structure having a slide groove for matching the geometrical positional relationship between the fluorescent screen and the shadow mask while sliding the transparent substrate. Item 7. A color cathode ray tube according to any one of items 1 to 6. 12. The metal frame comprises a shadow mask supporting portion and a transparent substrate supporting portion formed of separate metal frames, and after matching the geometrical positional relationship between them,
It is fixed by joining.
The described color cathode ray tube. 13. A bimetal mechanism for adjusting the relative distance between the shadow mask supporting metal frame and the transparent substrate supporting metal frame in response to the temperature change of the transparent substrate. 13. The color cathode ray tube according to claim 12, wherein. 14. A shadow mask supporting metal frame and a transparent substrate supporting metal frame are bonded and fixed by a pair of bonding supports after matching the geometrical positional relationship between the shadow mask supporting metal frame and the transparent substrate supporting metal frame. 13. The supporting metal frame body has a flexible structure at its end, and the relative distance between the two at the end is adjusted according to the temperature change of the transparent substrate. Color cathode ray tube. 15. The face of a glass bulb panel.
15. The color cathode ray tube according to claim 1, wherein a surface reflection reducing optical film is formed on at least two or more of a total of three surfaces of the plate portion inner and outer surfaces and the transparent substrate-side outer surface. 16. The color cathode ray tube according to claim 1, wherein the transparent substrate is made of lead-free glass, and the panel forming the glass bulb is made of lead-added glass. 17. The color cathode ray tube according to claim 16, wherein the colored metal ions are added to the transparent substrate of the lead-free glass, and the colored metal ions are not added to the lead-added glass forming the panel. 18. A panel is formed by forming a side wall portion of a glass bulb panel with a metal, and is joined to a glass plate of a face plate portion by frit glass, and the inside surface of the side wall portion is formed by frit glass. 18. The color cathode ray tube according to claim 1, wherein a metal frame is supported by the joined ceramic pins, and the metal on the side wall of the panel is electrically insulated from the metal frame. 19. The color cathode ray tube according to claim 18, wherein the metal forming the side wall of the panel of the glass bulb is made of Kovar material. 20. A contrast enhancing filter layer made of an inorganic material is provided between the transparent substrate and the three-color phosphor layer, each photochemical property corresponding to the emission property of each phosphor layer. The color cathode ray tube according to any one of claims 1 to 19. 21. The contrast enhancement filter layer and / or the black matrix layer are provided on the opposite side of the transparent base of the fluorescent screen from the surface on which the three-color phosphor layer is provided. The color cathode ray tube according to claim 20, wherein the color cathode ray tube is formed so as to correspond to the position where the phosphor layer is formed. 22. A beam interval on a deflection yoke surface of three electron beams of an electron gun is changed in synchronization with at least vertical deflection positions of the three electron beams. The color cathode ray tube according to any one of 1 to 21. 23. A vacuum envelope of a glass bulb comprising a panel and a funnel, an electron gun disposed in the vacuum envelope for emitting three electron beams, and the vacuum envelope. The shadow mask * phosphor screen structure is provided at a fixed position inside the funnel of the panel and is arranged so as to be close to the inner surface of the face plate part of the panel and to face the electron gun. The structure is a shadow mask consisting of a slit-shaped grill stretched and held in a metal frame so as to have a curved line constituted by a straight line in the vertical direction of the face plate portion and a predetermined curved line in the horizontal direction, A three-color phosphor layer, which is held integrally with the shadow mask at a predetermined interval on the metal frame, and emits light by bombardment of an electron beam passing through the shadow mask. A method of manufacturing a color cathode ray tube comprising a transparent substrate having a fluorescent screen formed thereon, wherein at least three-color phosphor layers are formed on the transparent substrate by direct printing when forming the fluorescent screen. A method of manufacturing a color cathode ray tube, characterized in that. 24. A vacuum envelope of a glass bulb comprising a panel and a funnel, an electron gun disposed in the vacuum envelope for emitting three electron beams, and the vacuum envelope. The shadow mask * phosphor screen structure is provided at a fixed position inside the funnel of the panel and is arranged so as to be close to the inner surface of the face plate part of the panel and to face the electron gun. The structure is a shadow mask consisting of a slit-shaped grill stretched and held in a metal frame so as to have a curved line constituted by a straight line in the vertical direction of the face plate portion and a predetermined curved line in the horizontal direction, A three-color phosphor layer that is integrally supported by the metal frame with the shadow mask at a predetermined interval and emits light by the bombardment of the electron beam passing through the shadow mask. In a method for manufacturing a color cathode ray tube comprising a transparent substrate having a fluorescent screen formed thereon, a method of directly printing a phosphor layer of at least three colors on a sheet of plastic or the like when forming the fluorescent screen. And a phosphor screen formed on the transparent substrate to form a phosphor screen, the method for manufacturing a color cathode ray tube. 25. At least 3 on a flat transparent substrate.
The color cathode ray tube according to claim 23 or 24, characterized in that after the color phosphor layer is formed by a printing method, the transparent substrate is heated to be formed into a curved shape along the transparent substrate supporting surface of the metal frame. Production method. 26. The transparent substrate used in the method of manufacturing a color cathode ray tube according to claim 23, which has a three-color phosphor layer formed by a printing method. 27. The sheet used in the method for manufacturing a color cathode ray tube according to claim 24, which has a three-color phosphor layer formed by a printing method.