JP2004134265A - Back panel member of flat panel display and vacuum container using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a back panel member of a flat panel display, and a vacuum container wherein various defects are suppressed as much as possible and sufficient weight reduction can be made by taking effective reinforcing countermeasures at appropriate places. <P>SOLUTION: The back panel member 3 forming a vacuum space part 2 between the front panel member 1 in the flat panel display is constructed of a back flat plate part 3a having an inner face 3x facing the vacuum space part 3 and a reinforcing part protruding toward the back face side of this back flat plate part 3a. This reinforcing part is constructed of an extended part 3b extended toward the back face side from the periphery of the back flat plate and a plurality of ribs 3d. Then, the back flat plate 3a and the reinforcing parts 3b, 3d are formed in one body by press molding. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a back panel member of a flat panel display and a vacuum container 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. To a back panel member and a vacuum container.
[0002]
[Prior art]
In recent years, thin displays have come into widespread use instead of or along with cathode ray tubes (CRTs) having a long depth dimension. Examples of such thin displays include a field emission display (FED) and a plasma display (FED). 2. Description of the Related Art A flat panel display of a type in which the inside is in a vacuum state, as represented by PDP, is known.
[0003]
A vacuum container of this type of flat panel display includes a flat front panel having an effective screen for displaying an image and a flat back panel arranged in parallel on the back side of the flat front panel. ) Are sealed via a frame-shaped side wall member disposed between the two panels, and a vacuum gap is provided at an inner peripheral side portion (effective screen portion) of the side wall member between the two panels. It is formed.
[0004]
In order to meet the demand for thinner and lighter flat panel displays, it is convenient to make the front panel and the back panel thinner. However, if this is done, due to the presence of a vacuum gap, This causes a bending deformation such that the front panel and the back panel come close to each other.
[0005]
Therefore, for example, according to the following Patent Document 1 (FIG. 3 of the document), a vacuum container for a flat panel display configured by sealing a front panel made of flat glass and a box-shaped back panel made of ceramic. Discloses that a rib is 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, when the ribs are formed over the entire outer surface of the box-shaped back panel as in the vacuum container for a flat panel display disclosed in Patent Document 1, the outer surface of the back panel is not only formed on the flat portion but also on the outer surface of the side wall. This also necessitates the formation of ribs, which increases the total weight of the ribs, which hinders weight reduction.
[0008]
In addition, for example, in a vacuum vessel of a field emission display, since the inner surface of the flat plate portion of the back panel is a portion where the cathode electrode layer is formed, polishing is performed to improve the surface roughness and flatness of the inner surface of the flat plate portion. However, if the back panel has a side wall, the side wall becomes an obstacle when the inner surface of the flat plate is polished, which is a factor that hinders a smooth operation.
[0009]
Therefore, in this type of vacuum container for flat panel display, it is difficult to say that an accurate measure is taken simply by forming a rib, and for any part, if a reinforcing structure of any form is adopted. The question is whether it is the best solution.
[0010]
The present invention has been made in view of the above circumstances, and by taking effective reinforcing measures for appropriate portions, it is possible to achieve sufficient weight reduction while suppressing various adverse effects as much as possible. It is a technical object to provide a back panel member and a vacuum container of a flat panel display.
[0011]
[Means for Solving the Problems]
The present invention has been made in order to solve the above technical problem, and a back panel member arranged to form a vacuum gap between the front panel member of a flat panel display and an inner surface facing the vacuum gap. And a reinforcing portion protruding on the back side of the back flat plate portion. Here, the back panel member is preferably formed of glass, but may be formed of another material such as ceramic.
[0012]
According to such a configuration, the back panel member includes the back flat plate portion and the reinforcing portion, and since the reinforcing portion is provided only in the back flat plate portion, the formation region of the reinforcing portion can be reduced. Accordingly, it is possible to contribute to the weight reduction of the reinforcing portion and, consequently, the weight reduction of the flat panel display. In addition, since the reinforcing portion protrudes to the back side of the back flat plate portion, there is no protrusion to the front side at the inner surface side portion of the back flat plate portion. Therefore, when performing polishing to improve the surface roughness and flatness of the inner surface of the back flat plate portion, there is no portion that hinders the polishing operation, so that the smoothing of the polishing operation is promoted, for example, in a field emission display. The cathode electrode layer can be appropriately formed on the inner surface (polished surface) of the back flat plate portion.
[0013]
In this case, the reinforcing portion may be a rib integrally formed on the back surface of the back flat plate portion or separately fixed thereto, or a corrugated surface portion integrally formed on the back surface of the back flat plate portion (a convex portion of the corrugated surface portion). ). Further, the reinforcing portion may include an extending portion extending from the peripheral edge of the back flat plate portion toward the back side instead of or together with the rib or the corrugated surface portion. That is, the back flat plate portion can obtain a sufficient reinforcing effect only by such an extending portion, but the reinforcing effect is further increased by using the back flat portion together with the rib or the corrugated surface portion. In particular, by using the corrugated surface portion, local stress concentration can be avoided, and the overall strength can be improved.
[0014]
In the above configuration, it is preferable that the back flat plate portion and the reinforcing portion are 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. By doing so, the back panel member having appropriate rigidity can be easily and inexpensively manufactured, 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-mentioned extended portion can be easily and inevitably formed on the periphery of the back flat plate portion.
[0015]
In addition, if a vacuum container for a flat panel display is formed using the back panel member having the above configuration, it is possible to provide a flat panel display having sufficient rigidity and capable of reducing the weight. In addition, for the back panel member having the above configuration, the front panel member has a front flat plate portion arranged in parallel with the back flat plate portion of the back panel member, and a side wall portion connected to the periphery of the front flat plate portion, Preferably, a sealing end portion connected to the side wall portion and sealed to the inner surface side of the back panel member is provided. With this configuration, as in the case where the front panel member is constituted only by 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, for example, frit glass. The need for sealing is eliminated, the work of assembling the flat panel display can be performed simply and easily, and the absence or presence of a sealing portion on the front side improves the appearance or appearance of the display on the front side.
[0016]
Further, it is preferable that the vacuum container for a flat panel display is a vacuum container for a field emission display. That is, the above configuration is applicable to a vacuum container for a flat panel display having a vacuum gap between two panel members, and is applicable to a vacuum container for a plasma display and the like. If the present invention is 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 it can greatly contribute to the weight reduction of this type of display.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a back panel member and a vacuum container of a flat panel display according to an embodiment of the present invention will be described with reference to the drawings. FIG. 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. 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 has a box-shaped (dish-shaped) front panel member 1 having a rectangular front flat plate portion 1a forming an effective screen for image display. 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 via a vacuum gap 2. 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 connected to the periphery of the front flat plate portion 1a, and a continuous side wall portion 1b. And a sealing end 1c sealed to the inner surface side of the back panel member 3. In this case, the sealing end portion 1c is formed in a flange shape projecting from the side wall portion 1b toward the outer peripheral side, and the end surface of the sealing end portion 1c is interposed with the frit glass 4 at the front side flat peripheral portion of the back flat plate portion 3a. Let me be sealed.
[0020]
As shown in FIG. 3, the back panel member 3 has an extension 3b extending from the periphery of the back flat plate portion 3a toward the back side (back side) and surrounding the back flat plate portion 3a. The extension 3b is a reinforcement. Each side 3c of the extension 3b is inclined in a direction gradually moving away from the center axis X as it moves toward the rear side (upper side in the figure) in consideration of the removability during press molding. ing.
[0021]
When this vacuum container is configured as a vacuum container 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 is formed. 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 a field emission display, but may be applied to any other flat panel display such as a plasma display having a vacuum inside.
[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, the two panel members 1 and 3 are arranged such that a male mold is vertically movable above and below a female mold, and after supplying a molten glass mass into the female mold, the male mold is lowered to press the molten glass mass. 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 vessel according to the first embodiment, the back panel member 3 is composed of the back flat plate portion 3a and the extension portion 3b, and the formation region of the extension portion 3b as a reinforcing portion is defined as a narrow region. Therefore, the weight of the back panel member 3 and the weight of the flat panel display can be reduced while ensuring an appropriate reinforcing effect. Further, since the extension portion 3b protrudes to the rear side of the back flat plate portion 3a, there is no protrusion to the front side around the inner surface 3x of the back flat plate portion 3a. As a result, there is no obstacle in performing the polishing process to improve the surface roughness and the flatness of the inner surface 3x of the back flat plate portion 3a, and the smoothing of the polishing operation is promoted. The cathode electrode layer can be appropriately formed on the inner surface 3x (polished surface) of 3a.
[0024]
FIG. 4 is a longitudinal sectional front view showing the entire configuration of a vacuum vessel according to a 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. The difference between the vacuum vessel according to the second embodiment and the vacuum vessel according to the above-described first embodiment is that a plurality of ribs 3d protrude from the back surface of the back flat plate portion 3a of the back panel member 3. It is. The longitudinal ends of these ribs 3d are continuous with the inner surface of the extension 3b of the back panel member 3, and the size of each rib 3d protruding to the rear side is determined by the distance from the rear side of the extension 3b. It is shorter than the protruding dimension. Further, these ribs 3d are integrally formed by press molding as a part of the back panel member 3. 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. Alternatively, the shape may be a triangle, a hexagon, or another shape. In FIGS. 4 to 6, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof is omitted.
[0025]
FIG. 7 is a longitudinal sectional front view showing the entire configuration of a vacuum vessel according to a 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. The difference between the vacuum vessel according to the third embodiment and the vacuum vessel according to the above-described first embodiment is that the back panel member 3 has a rectangular back flat plate portion 3a and protrudes from the back surface thereof. This is a point that it is composed of a plurality of ribs 3d and has no extension. Also in this case, each rib 3d may be integrally formed by press molding as a part of the back panel member 3, 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. Further, as shown in FIG. You may. In FIGS. 7 to 9, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof is omitted.
[0026]
FIG. 10 is a longitudinal sectional front view showing the entire configuration of the vacuum vessel according to the fourth embodiment of the present invention. The difference between the vacuum vessel according to the fourth embodiment and the vacuum vessel according to the above-described first embodiment is that the corrugated surface 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 a part of the surface portion 3e. Therefore, the back panel member 3 is also obtained by pressing the molten glass lump using the male mold and the female mold, and the portion of the corrugated surface portion 3e serving as the ridge 3f serves as a reinforcing portion. . Further, the arrangement direction of each ridge 3f of the corrugated surface portion 3e is not limited to the vertical direction as shown in the figure, and may be a horizontal direction. Further, the ridges 3f are arranged vertically and horizontally, that is, in a lattice shape. Is also good. In FIG. 10, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and 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 difference between the vacuum vessel according to the fifth embodiment and the vacuum vessel according to the above-described first embodiment is that the front panel member 1 is constituted only by a rectangular front flat plate portion 1a. This is a point that a rectangular frame-shaped side wall member 5 is interposed between the peripheral portion of 1a (invalid screen portion) and the peripheral portion of the back flat plate portion 3a. In this case, the frit glass 6 seals between both ends of the side wall member 5 and the front flat plate portion 1a and the back flat plate portion 3a. As the back panel member 3, any of the above-described first to fourth embodiments may be applied. In FIG. 11, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0028]
【The invention's effect】
As described above, according to the present invention, the back panel member forming the vacuum gap between the front panel member, the back flat plate portion having an inner surface facing the vacuum gap portion, and the back flat plate portion The reinforcing part is provided only on the back flat part, so that the reinforcing part can be formed in a narrow area, and the reinforcing part can be reduced in weight. As a result, it is possible to contribute to the weight reduction of the flat panel display. In addition, since the reinforcing portion protrudes to the rear side of the back flat plate portion, there is no protrusion to the front side at the inner surface portion of the back flat plate portion. Polishing for improving the degree of smoothness can be performed smoothly. In particular, in a 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]
The reinforcing portion may be a rib or a corrugated surface portion, but instead or together with the reinforcing portion, an extending portion extending from the peripheral edge of the back flat plate portion toward the back side may be used as the reinforcing portion. Thereby, it can be easily manufactured by press molding, which is advantageous for mass production.
[0030]
In addition, if a vacuum container for a flat panel display is configured using the above-described back panel member, it is possible to provide a flat panel display having sufficient rigidity and capable of reducing the weight.
[0031]
Furthermore, if this vacuum container 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 external appearance of a vacuum container for a flat panel display according to a first embodiment of the present invention.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is a perspective view of a back panel member, which is a component of the vacuum container for a flat panel display, according to the first embodiment of the present invention, as viewed from the back side.
FIG. 4 is a longitudinal sectional front view showing a vacuum container for a flat panel display 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 vacuum container for a flat panel display, 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 vacuum container for a flat panel display according to the second embodiment of the present invention, as viewed from the back side.
FIG. 7 is a longitudinal sectional front view showing a vacuum container for a flat panel display 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 vacuum container for a flat panel display, 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 which is a component of the vacuum container for a flat panel display according to the third embodiment of the present invention as viewed from the back side.
FIG. 10 is a vertical sectional front view showing a vacuum container for a flat panel display according to a fourth embodiment of the present invention.
FIG. 11 is a longitudinal sectional front view showing a vacuum container for a flat panel display 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)
3e Corrugated surface (reinforcement)

Claims (7)

In a back panel member arranged to form a vacuum gap between the front panel member of the flat panel display,
A back panel member for a flat panel display, comprising: a back flat plate portion having an inner surface facing the vacuum gap portion; and a reinforcing portion projecting to the back side of the back flat plate portion. The back panel member according to claim 1, wherein the reinforcing portion includes a rib formed on a back surface of the back flat plate portion. The back panel member of a flat panel display according to claim 1, wherein the reinforcing portion includes a corrugated surface formed on a back surface of the back flat plate. The back panel according to any one of claims 1 to 3, wherein the reinforcing portion includes an extending portion extending from a peripheral edge of the back flat plate portion toward a back side. Element. The back panel member of a flat panel display according to any one of claims 1 to 4, wherein the back flat plate portion and the reinforcing portion are integrally formed by press molding. A vacuum container for a flat panel display, which is manufactured using the back panel member according to claim 1. The vacuum container for a flat panel display according to claim 6, wherein the vacuum container for a flat panel display is a vacuum container for a field emission display.

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