JP3922555B2 - Back panel member of flat panel display and vacuum container using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a back panel member of a flat panel display and a vacuum vessel using the same, and is particularly used for a flat panel display of a type in which a vacuum gap is provided between both front and back panel members. The present invention relates to a back panel member and a vacuum container.
[0002]
[Prior art]
In recent years, thin displays have become widespread instead of or in addition to cathode ray tubes (CRT) having a long depth dimension, and examples of such thin displays include field emission displays (FEDs) and plasma displays ( As represented by PDP), a flat panel display in which the inside is in a vacuum state is known.
[0003]
This type of flat panel display vacuum vessel is composed of a flat front panel having an effective screen for image display and a flat back panel arranged in parallel on the back side of the flat front panel. ) Between the panels, and the inner peripheral side portion (effective screen portion) of the side wall member between the panels has a vacuum gap. It is formed.
[0004]
In order to meet the demand for such thin and light flat panel displays, it is convenient to make the front panel and back panel thin, but if this is done, it is due to the presence of a vacuum gap. Then, the front panel and the back panel are bent and deformed so as to be close to each other.
[0005]
Thus, for example, according to the following Patent Document 1 (FIG. 3 of the same document), a flat panel display vacuum vessel constituted by sealing a front panel made of flat glass and a box-shaped back panel made of ceramic. In US Pat. No. 5,637, it is disclosed that ribs are formed over the entire outer surface of the back panel.
[0006]
[Patent Document 1]
JP-A-7-176277 (FIG. 3)
[0007]
[Problems to be solved by the invention]
However, as in the case of the flat panel display vacuum vessel disclosed in Patent Document 1, ribs are formed over the entire outer surface of the box-shaped back panel, so that not only the flat plate portion of the back panel but also the outer surface of the side wall portion. However, there is a need to form ribs, which increases the total weight of the ribs and hinders weight reduction.
[0008]
In addition, for example, in the vacuum vessel of a field emission display, the inner surface of the flat plate portion of the back panel becomes the formation site of the cathode electrode layer, and therefore polishing processing is performed to improve the surface roughness and flatness of the inner surface of the flat plate portion. However, when the side wall portion exists in the back panel, the side wall portion becomes a hindrance when polishing the inner surface of the flat plate portion, and it becomes a factor that hinders smooth work.
[0009]
Therefore, in this type of flat panel display vacuum vessel, it is difficult to say that an appropriate measure has been taken simply by forming ribs, and if any form of reinforcing structure is adopted for any location. The question is whether this is the best measure.
[0010]
The present invention has been made in view of the above circumstances, and by taking effective reinforcement measures for appropriate locations, it is possible to achieve sufficient weight reduction while suppressing various harmful effects as much as possible. It is a technical problem to provide a back panel member and a vacuum vessel for a flat panel display.
[0011]
[Means for Solving the Problems]
In order to solve the above technical problem, the present invention provides a back panel member arranged to form a vacuum gap between a front panel member of a flat panel display and an inner surface facing the vacuum gap. A back flat plate portion having one surface, and a reinforcing portion that extends from the periphery of the back flat plate portion toward the back side and that surrounds the back flat plate portion. It is. Here, the back panel member is preferably formed of glass, but may be formed of other materials such as ceramic.
[0012]
According to this structure, the back panel member, and the back plate portion, and a reinforcement portion made of extended portions, since the reinforcing part will be provided only for the back plate portion, reinforcing The formation area of the part can be narrowed, and accordingly, it is possible to contribute to the weight reduction of the reinforcing part and the weight of the flat panel display. Moreover, the reinforcing portion consisting of the extending portion, since it protrudes to the rear side of the back plate portion, it is possible to make the inner surface portion of the back plate portion projecting portions of the full Ronto side no longer exists. Therefore, it is possible to eliminate a hindrance when performing polishing for improving the surface roughness and flatness of the inner surface of the back flat plate portion, facilitating the smoothing of the polishing work, for example, in a field emission display Can properly form the cathode electrode layer on the inner surface (polished surface) of the back flat plate portion.
[0013]
In this case, the inner surface of the extending portion definitive the back of the bar click flat portion, it may be further provided with a reinforcing portion made of a rib.
[0014]
In the above configuration, the back flat plate portion and the reinforcing portion are preferably integrally formed by press molding. Such integral formation by press molding is particularly advantageous when the back flat plate portion and the reinforcing portion are formed of glass. In this way, a back panel member having appropriate rigidity can be manufactured easily and inexpensively, and the working time can be shortened, which is advantageous for mass production. In particular, when the molten glass lump is press-molded with a male mold and a female mold, the above-described extending portion can be easily and inevitably formed on the periphery of the back flat plate portion.
[0015]
Further, if a flat panel display vacuum vessel is configured using the back panel member having the above-described configuration, a flat panel display that has sufficient rigidity and can be reduced in weight can be provided. In addition, with respect to the back panel member having the above configuration, the front panel member includes a front flat plate portion arranged in parallel with the back flat plate portion of the back panel member, and a side wall portion continuous to the periphery of the front flat plate portion, It is preferable to include a sealing end portion that is continuous with the side wall portion and is sealed to the inner surface side of the back panel member. In this way, as in the case where the front panel member is composed only of the front flat plate portion, a separate side wall member is interposed between the back panel member and the front panel member, and both ends thereof are made of frit glass, for example. There is no need for sealing, the assembly work of the flat panel display can be performed easily and easily, and since there is no sealing part on the front side, the appearance or appearance of the front side of the display is improved.
[0016]
Further, the flat panel display vacuum vessel is preferably a field emission display vacuum vessel. That is, the above-described configuration can be applied to a flat panel display vacuum container having a vacuum gap between two panel members, and can be applied to a plasma display vacuum container or the like. When applied to a vacuum vessel for a field emission display, the advantages relating to the formation of the cathode electrode layer described above can be enjoyed, and the light weight of this type of display can be greatly contributed.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a back panel member and a vacuum vessel of a flat panel display according to an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view showing an overall schematic configuration of a vacuum vessel according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is a back as a component of the vacuum vessel. It is the perspective view which looked at the panel member from the back side.
[0018]
As shown in FIGS. 1 and 2, the vacuum container according to the first embodiment includes a box-shaped (dish-shaped) front panel member 1 having a rectangular front flat plate portion 1a that forms an effective image display screen. And a box-shaped (dish-shaped) back panel member 3 having a rectangular back flat plate portion 3a sealed on the back side of the front panel member 1 with a vacuum gap 2 interposed therebetween. In this case, both the front panel member 1 and the back panel member 2 are formed of glass, and in particular, the front panel member 1 is formed of transparent glass.
[0019]
The front panel member 1 includes the above-described front flat plate portion 1a arranged in parallel with the back flat plate portion 3a of the back panel member 3, a side wall portion 1b continuous to the peripheral edge of the front flat plate portion 1a, and the side wall portion 1b. And a sealing end 1c that is sealed to the inner surface side (front side) of the back panel member 3. In this case, the sealing end portion 1c is formed in a bowl shape projecting from the side wall portion 1b toward the outer peripheral side, and the end surface of the sealing end portion 1c interposes the frit glass 4 on the flat peripheral portion on the front side of the back flat plate portion 3a. Let it be sealed.
[0020]
As shown in FIG. 3, the back panel member 3 has an extending portion 3b that extends from the periphery of the back flat plate portion 3a toward the back side (back side) and surrounds the back flat plate portion 3a. The extending part 3b is a reinforcing part. Each side portion 3c of the extending portion 3b is inclined in a direction of gradually moving away from the central axis X as it moves to the back side (upper side in the drawing) in consideration of the pulling property at the time of press molding. ing.
[0021]
When this vacuum vessel is configured as a vacuum vessel of a field emission display (FED), a phosphor layer and an anode electrode layer are formed on the inner surface 1x of the front flat plate portion 1a of the front panel member 1, and the back panel A cathode electrode layer is formed on the inner surface 3x of the back flat plate portion 3a of the member 3. A vacuum gap 2 is formed between the inner surface 1x of the front flat plate portion 1a and the inner surface 1y of the side wall portion 1b of the front panel member 1 and the inner surface 3x of the back flat plate portion 3a of the back panel member 3. The vacuum container is not limited to the field emission display, but can be applied to other types as long as it is a flat panel display whose inside is in a vacuum state, such as a plasma display.
[0022]
In the first embodiment, both the front panel member 1 and the back panel member 3 are manufactured by press molding using a molding die. That is, both the panel members 1 and 3 are arranged so that the male mold can be moved up and down above the female mold, and after the molten glass lump is supplied into the female mold, the male mold is lowered to press the molten glass lump. It is obtained by doing. In this case, at the time of pressing, both the front panel member 1 and the back panel member 3 are molded upside down from the state shown in FIG. 2 in the gap between the female mold and the male mold.
[0023]
According to the vacuum container according to the first embodiment, the back panel member 3 includes the back flat plate portion 3a and the extending portion 3b, and the formation region of the extending portion 3b as the reinforcing portion is defined as a narrow region. Therefore, it is possible to reduce the weight of the back panel member 3 and thus the flat panel display while ensuring an appropriate reinforcing effect. Furthermore, since the extension part 3b protrudes to the back side of the back flat plate part 3a, there is no protrusion to the front side around the inner surface 3x of the back flat plate part 3a. As a result, there are no obstacles in polishing to improve the surface roughness and flatness of the inner surface 3x of the back flat plate portion 3a, and the smoothing of the polishing operation is promoted. Especially in the field emission display, the back flat plate portion A cathode electrode layer can be appropriately formed on the inner surface 3x (polishing surface) of 3a.
[0024]
FIG. 4 is a longitudinal front view showing the overall configuration of the vacuum vessel according to the second embodiment of the present invention, and FIG. 5 is a perspective view of a back panel member, which is a component of the vacuum vessel, as viewed from the back side. The vacuum vessel according to the second embodiment is different from the vacuum vessel according to the first embodiment described above in that a plurality of ribs 3d are protruded from the back surface of the back flat plate portion 3a of the back panel member 3. It is. Then, both ends in the longitudinal direction of these ribs 3d are connected to the inner surface of the extending portion 3b of the back panel member 3, and the protruding dimension of each rib 3d to the back side is the back side of the extending portion 3b. The length is shorter than the protruding dimension. Further, these ribs 3d are integrally formed as a part of the back panel member 3 by press molding. However, if necessary, only the ribs 3d may be manufactured separately and fixed by frit glass or the like. Further, the arrangement direction of the ribs 3d is not limited to the vertical direction as shown in the figure, but may be the horizontal direction. Further, as shown in FIG. 6, the ribs 3d are arranged in the vertical and horizontal directions, that is, in a lattice pattern. Alternatively, a triangular shape, a hexagonal shape, or other shapes may be formed. 4 to 6, the same constituent elements as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.
[0025]
FIG. 7 is a longitudinal front view showing the overall configuration of the vacuum vessel according to the third embodiment of the present invention, and FIG. 8 is a perspective view of a back panel member, which is a component of the vacuum vessel, as viewed from the back side. The difference between the vacuum container according to the third embodiment and the vacuum container according to the first embodiment described above is that the back panel member 3 protrudes from the rectangular back flat plate portion 3a and the back surface thereof. It is comprised from the some rib 3d, and is a point which does not have an extension part. Also in this case, each rib 3d may be integrally formed as a part of the back panel member 3 by press molding, or only the rib 3d may be manufactured as a separate body and fixed by frit glass or the like. Further, the arrangement direction of the ribs 3d is not limited to the vertical direction as shown in the figure, and may be the horizontal direction. Furthermore, as shown in FIG. 9, the ribs 3d are arranged in the vertical and horizontal directions, that is, in a lattice pattern. May be. In FIG. 7 to FIG. 9, the same constituent elements as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.
[0026]
FIG. 10 is a longitudinal front view showing the overall configuration of the vacuum vessel according to the fourth embodiment of the present invention. The vacuum vessel according to the fourth embodiment is different from the vacuum vessel according to the first embodiment described above in that the corrugated surface portion 3e is integrally formed on the back surface of the back panel member 3, and the extending portion 3b is corrugated. This is a point that is part of the surface portion 3e. Therefore, this back panel member 3 is also obtained by pressing a molten glass lump using a male mold and a female mold, and the portion of the corrugated surface portion 3e that is the ridge 3f serves as a reinforcing portion. . Further, the arrangement direction of the ridges 3f of the corrugated surface portion 3e is not limited to the vertical direction as shown in the figure, and may be the horizontal direction. Also good. In FIG. 10, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0027]
FIG. 11 is a longitudinal sectional front view showing the overall configuration of the vacuum vessel according to the fifth embodiment of the present invention. The vacuum vessel according to the fifth embodiment is different from the vacuum vessel according to the first embodiment described above in that the front panel member 1 is constituted only by a rectangular front flat plate portion 1a, and this front flat plate portion. A rectangular frame-shaped side wall member 5 is interposed between the peripheral edge portion 1a (ineffective screen portion) and the peripheral edge portion of the back flat plate portion 3a. In this case, both ends of the side wall member 5 and the front flat plate portion 1a and the back flat plate portion 3a are sealed with the frit glass 6, respectively. And as the back panel member 3, you may apply any of the above-mentioned 1st-4th embodiment. In FIG. 11, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0028]
【The invention's effect】
According to the present invention as described above, back panel member forming a vacuum gap between the front panel member, a back plate portion having one surface serving as the inner surface facing the vacuum gap, the back plate portion periphery from was configured and a reinforcement portion made of extending portion protruding to the rear side from, the reinforcing part will be provided only for the back plate portion, the forming region of the reinforcing portion and the narrow region Therefore, it is possible to contribute to the weight reduction of the reinforcing portion and the weight reduction of the flat panel display. Moreover, the reinforcing portion, since the protruding on the rear side of the back plate portion, can be so that such the absence of projection of the full Ronto side on the inner surface portion of the back plate portion, a back plate portion Thus, a polishing process for improving the surface roughness and flatness of the inner surface of the back plate can be performed smoothly. In particular, in the field emission display, the cathode electrode layer can be appropriately formed on the inner surface of the back flat plate portion, that is, the polished surface.
[0029]
And although the said reinforcement part may be a rib or a corrugated surface part, it replaces with this and uses the extension part extended toward the back side from the periphery of the back flat plate part as a reinforcement part. Therefore, it becomes easy to manufacture by press molding, which is advantageous for mass production.
[0030]
Further, if a flat panel display vacuum vessel is configured using the back panel member described above, it is possible to provide a flat panel display that has sufficient rigidity and can be reduced in weight.
[0031]
Furthermore, if this vacuum vessel is applied to a field emission display, a sufficient reinforcing effect can be secured while reducing the thickness and weight of this type of display.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an appearance of a vacuum vessel for a flat panel display according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
FIG. 3 is a perspective view of a back panel member, which is a component of the flat panel display vacuum vessel according to the first embodiment of the present invention, as viewed from the back side.
FIG. 4 is a longitudinal front view showing a flat panel display vacuum vessel according to a second embodiment of the present invention.
FIG. 5 is a perspective view of a back panel member, which is a component of a flat panel display vacuum vessel according to a second embodiment of the present invention, as viewed from the back side.
FIG. 6 is a perspective view of another back panel member, which is a component of the flat panel display vacuum vessel according to the second embodiment of the present invention, as viewed from the back side.
FIG. 7 is a longitudinal front view showing a flat panel display vacuum vessel according to a third embodiment of the present invention.
FIG. 8 is a perspective view of a back panel member, which is a component of a flat panel display vacuum vessel according to a third embodiment of the present invention, as viewed from the back side.
FIG. 9 is a perspective view of another back panel member that is a component of a flat panel display vacuum vessel according to a third embodiment of the present invention, as viewed from the back side.
FIG. 10 is a longitudinal front view showing a flat panel display vacuum vessel according to a fourth embodiment of the present invention.
FIG. 11 is a longitudinal front view showing a flat panel display vacuum vessel according to a fifth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front panel member 2 Vacuum gap part 3 Back panel member 3a Back flat plate part 3b Extension part (reinforcement part)
3d rib (reinforcement part)
3e Corrugated surface (reinforcement)

Claims (5)

In the back panel member arranged to form a vacuum gap between the front panel member of the flat panel display,
A back flat plate portion having an inner surface facing the vacuum gap portion, and a reinforcing portion including an extended portion extending from the periphery of the back flat plate portion toward the back side and surrounding the back flat plate portion. back panel member of a flat panel display, characterized in that it comprises. Before SL on the inner surface side of the extending portion definitive on the back of the back plate portion, a flat panel display of the back panel member according to claim 1, characterized by further comprising a reinforcing portion made of a rib. The back panel member of a flat panel display according to claim 1 or 2 , wherein the back flat plate portion and the reinforcing portion are integrally formed by press molding. A vacuum vessel for a flat panel display, which is manufactured using the back panel member according to any one of claims 1 to 3 . 5. The flat panel display vacuum container according to claim 4 , wherein the flat panel display vacuum container is a field emission display vacuum container.

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