JP2004288401A - Tabular display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tabular display panel equipped with a structure facilitating air exhaustion. <P>SOLUTION: Since a sheet member 20 fitted between a front face plate 16 and a rear face plate 18 has a thickness periodically changing, so that an adhesion area between the sheet member 20 and either the front face plate 16 and the rear face plate 18 decreases, exhaust of air from each discharge space zoned by the sheet member 20 of a lattice shape becomes easy when air is exhausted through an exhaust hole 62 formed in penetration through the rear face plate 18. In spite of an efficient exhausting work, enough exhaust is made, so that quality of the PDP (tabular display panel) 10 is not impaired. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in a sealing method for a flat panel display device.
[0002]
[Prior art]
For example, a pair of flat plates, at least one of which has a light-transmitting property, are overlapped and hermetically sealed, and light is emitted by gas discharge generated in the airtight space, or ultraviolet light generated by the gas discharge, or the airtightness thereof. A flat panel display device of a type that displays a desired image by exciting a phosphor layer provided in the hermetic space with an electron beam generated from a cathode provided in the space to emit light, for example, A plasma display panel (Plasma Display Panel: PDP), a field emission display (Field Emission Display: FED), and the like are known (for example, see Non-Patent Document 1).
[0003]
[Non-patent document 1]
Tani Chizuka, "Advanced Display Technology," First Edition, First Printing, Kyoritsu Shuppan, December 28, 1998, p. 82-84, 101-106
[0004]
[Problems to be solved by the invention]
By the way, the flat panel display device as described above is used for displaying one image by itself, and a large screen is displayed by closely arranging a plurality of images and displaying one image as a whole. Is also used as a so-called tile type display device. In such a tile-type display device, an airtight space between the front plate and the back plate is partitioned by a grid-like sheet member, and discharge for causing the display pixels to emit light is controlled in each of the partitioned spaces. In addition, in order to obtain high display quality, it is desired that the interval between the effective display areas of the display device is as small as possible and that the continuity of the image is high.
[0005]
For this reason, since it is desired to secure a display area as large as possible while keeping the external dimensions small in the display device, exhausting for high vacuum and sealing for sealing low-pressure gas are required. This is generally performed through an exhaust hole formed through the back plate. However, when exhausting or gas sealing is performed through the exhaust hole formed through the back plate in this way, it is possible to quickly exhaust all discharge spaces defined by the grid-like sheet member as described above. It is relatively difficult, and if the exhaust operation is to be performed efficiently, the exhaust becomes insufficient and the quality of the flat panel display device may be impaired.
[0006]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a flat panel display device having a structure that facilitates exhaust.
[0007]
[Means for Solving the Problems]
The gist of the present invention for achieving such an object is to provide a transparent front plate, a rear plate arranged in parallel at a predetermined distance from the front plate, and a parallel between the front plate and the rear plate. And a grid-like sheet member made of a thick-film dielectric having a predetermined thickness dimension, and opposed to each other in each of the discharge spaces defined by the sheet member and divided into a plurality of discharge spaces by the sheet member. A plurality of pairs of discharge electrodes, a plurality of thick film conductors embedded in the sheet member so as to extend parallel to each other along one direction of a lattice of the sheet member, and the sheet member on the back plate. A writing electrode disposed so as to extend in parallel with the other direction of the lattice, wherein the sheet member in which the thick film conductor is embedded has a periodically changing thickness. Having Lies in the fact of the is.
[0008]
【The invention's effect】
With this configuration, since the sheet member provided between the front plate and the back plate has a thickness that changes periodically, the contact area between the sheet member and the front plate and the back plate is reduced, When the air is exhausted through the exhaust holes formed through the back plate, the exhaust from each discharge space defined by the grid-like sheet member is facilitated, and even when the exhaust work is performed efficiently, the exhaust becomes sufficient, The quality of the flat panel display is not impaired.
[0009]
Other aspects of the invention
Here, preferably, the thickness of the sheet member changes at a period equal to or less than the period of the lattice of the sheet member. In this case, there is an advantage that each discharge space defined by the grid-like sheet member communicates with the area exhaust hole.
[0010]
Preferably, the thickness of the sheet member periodically changes in a direction orthogonal to the direction of the thick-film conductor embedded in the sheet member. With this configuration, by forming the sheet member from a material having a smaller firing shrinkage than the thick film conductor embedded therein, a periodic thickness change can be easily provided to the sheet member.
[0011]
Preferably, the back plate has a plurality of exhaust holes formed at positions corresponding to intersections of the lattice-shaped sheet members, respectively. With this configuration, the position of the exhaust hole is a position that is not easily seen from the opening of the lattice-shaped sheet member that constitutes the pixel for displaying an image, so that the display quality is improved.
[0012]
Preferably, the back plate includes a single exhaust pipe connected to the back surface of the back plate and communicating with a plurality of exhaust holes formed in the back plate. According to this configuration, by performing exhaust using a single exhaust pipe, exhaust is performed from the discharge space between the front plate and the rear plate through the plurality of exhaust holes, so that the exhaust efficiency is improved.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an application example of the present invention will be described in detail with reference to the drawings. In the drawings used in the following description, dimensional ratios such as length, width, and thickness are appropriately changed for easy understanding.
[0014]
FIG. 1 is a perspective view showing the entirety of an AC (AC driving) type PDP (Plasma Display Panel: hereinafter referred to as PDP) 10 which is a flat panel display device according to one embodiment of the present invention. In the figure, a PDP 10 has a tile shape, that is, a rectangular plate shape, and is used to constitute a tile type display device that forms a large screen by, for example, arranging a large number of similar panels closely in a plane direction. A pair of front and back plates 16 and 18 arranged in parallel to each other are hermetically joined to each other at their outer peripheral edges at a slight distance of about several hundred microns, and the four outer peripheral edges are formed. A sealing agent 54 made of, for example, low-melting-point sealing glass is fixed to an end face of the sealing member 54. In the figure, a PDP 10 has a display area dimension of about 20 inches (400 × 300 (mm)) diagonally, and is a so-called tile-type display device element in which a plurality of sheets are closely arranged vertically and horizontally to constitute a large screen. Used as
[0015]
FIG. 2 is a diagram illustrating the internal structure of the PDP 10 with a part thereof cut away. The PDP 10 has a front plate (first flat plate) 16 and a back plate (first flat plate) 16 which are arranged parallel to each other at a slight interval of, for example, about several hundred microns so that the substantially flat surfaces 12 and 14 face each other. 18) are provided. The front plate 16 and the back plate 18 are hermetically sealed at the peripheral edge thereof via a grid-like sheet member 20 (thick film sheet electrode), whereby an airtight space is formed inside the PDP 10. . Each of the front plate 16 and the rear plate 18 has a size of about 450 × 350 (mm) and a uniform thickness of about 1.1 to 3 (mm), has a light transmitting property, and has a softening point. Are made of soda lime glass or the like having a similar temperature of about 700 (° C.). In the present embodiment, the front plate 16 corresponds to a first flat plate, and the back plate 18 corresponds to a second flat plate.
[0016]
On the back plate 18, a plurality of elongated partition walls 22 extending in one direction and parallel to each other are fixed within a range of 0.2 to 3 (mm), for example, about 1.0 (mm). The airtight space between the front plate 16 and the back plate 18 is divided into a plurality of discharge spaces 24. The partition walls 22 are made of a thick film material whose main component is a low softening point glass such as a PbO—B ₂ O ₃ —SiO ₂ —Al ₂ O ₃ —ZnO—TiO ₂ system or a combination thereof. The width dimension is in the range of about 60 (μm) to 1.0 (mm), for example, about 200 (μm), and the height dimension is in the range of about 5 to 300 (μm), for example, about 50 (μm). It is provided with. The fineness, strength, shape retention, and the like of the film are adjusted by appropriately adding an inorganic filler such as alumina or other inorganic pigments to the partition walls 22. The sheet member 20 has a positional relationship in which a portion extending along one direction overlaps the top of the partition wall 22.
[0017]
Further, on the back plate 18, an under coat 26 made of low alkali glass or non-alkali glass or the like covering almost the entire inner surface 14 is provided, and a plurality of books made of thick film silver or the like are provided thereon. An embedded electrode 28 is provided at a position between and along the longitudinal direction of the plurality of partition walls 22 so as to be covered with an overcoat 30 made of an inorganic filler such as low softening point glass and white titanium oxide. . The partition wall 22 is provided so as to protrude from the overcoat 30.
[0018]
Further, on the surface of the overcoat 30 and the side surfaces of the partition walls 22, a phosphor layer 32 coated separately for each discharge space 24 is provided, for example, with a thickness determined for each color in a range of about 10 to 20 (μm). Have been. The phosphor layer 32 is made of, for example, one of three phosphors corresponding to emission colors such as R (red), G (green), and B (blue) emitted by ultraviolet excitation. The discharge spaces 24 are provided so as to have mutually different emission colors. The undercoat 26 and the overcoat 30 are provided for the purpose of preventing the reaction between the writing electrode 28 made of thick silver and the back plate 18 and the contamination of the phosphor layer 32. is there.
[0019]
On the other hand, on the inner surface 12 of the front plate 16, a partition 34 made of a thick film containing, for example, a black pigment is provided in a stripe shape at a position facing the partition 22. The partition wall 34 is made of, for example, the same material as the partition wall 22 and has a height (thickness) of, for example, about 5 to 300 (μm), for example, about 50 (μm). Between the partitions 34 on the inner surface 12 of the front plate, a phosphor layer 36 is provided in a stripe shape with a thickness of, for example, about 5 (μm) within a range of, for example, about 3 to 50 (μm). The phosphor layer 36 has the same luminescent color as the phosphor layer 32 provided on the back plate 18 so that a single luminescent color is obtained for each discharge space 24. The height of the partition 34 is determined so that the surface thereof is higher than the surface of the phosphor layer 36 in order to prevent the sheet member 20 from contacting the phosphor layer 36.
[0020]
FIG. 3 is a diagram showing a main part of the configuration of the sheet member 20 with a part thereof cut away. In FIG. 3, the sheet member 20 has a lattice shape and has a thickness dimension that periodically changes within a range of, for example, 50 to 500 (μm), and preferably about 100 to 300 (μm). A thick film conductor 52 buried in a part of the sheet member 20 and extending in a direction orthogonal to the write electrode 28; a dielectric film 48 provided so as to cover the whole; The protective film 50 is provided so as to further cover the film 48 and constitutes a surface layer portion of the sheet member 20. The thickness of the sheet member 20 is substantially constant in the longitudinal direction of the thick-film conductor 52, but in the direction perpendicular to the thick-film conductor 52, the thickness becomes maximum between the openings of the lattice and minimum at the center of the opening. The thickness is changed at a period synchronized with the opening period of the grating so as to be a thickness.
[0021]
The lattice-shaped sheet member 20 is made of a dielectric material, for example, a PbO—B ₂ O ₃ —SiO ₂ —Al ₂ O ₃ —ZnO—TiO ₂ system or a combination thereof, for example, Al ₂ O ₃ —SiO ₂ —PbO. , And a thick film dielectric material such as a ceramic filler such as alumina. The portions of the sheet member 20 extending in the vertical and horizontal directions constituting the lattice are slightly wider in the direction along the partition walls 22 in consideration of the alignment margin or the width dimension of the partition walls 22, For example, it has a width in the range of 70 (μm) to 1.1 (mm), for example, about 300 (μm), and is provided at a center interval of about 1.0 (mm), which is the same as that of the partition wall 22. Further, in the direction orthogonal to the partition wall 22, a width dimension sufficiently smaller than the range, for example, about 60 (μm) to 1.0 (mm), for example, about 150 (μm), and about 200 (μm) to It is provided within a range of 1.0 (mm), for example, at a center interval of about 500 (μm). For this reason, the size of the grid opening 42 is, for example, about 700 × 350 (μm).
[0022]
The thick-film conductor 52 is a relatively porous thick-film conductor containing, for example, aluminum (Al) or the like as a conductive component and having a porosity of about 30 (%), for example, 10 to 50 (μm). , For example, having a thickness of about 30 (μm). A plurality of the conductor layers 44 are provided along one direction of the lattice of the dielectric layers 38 and 40, that is, a direction orthogonal to the partition wall 22. The thick film conductor 52 has a width dimension smaller than the width dimension of the sheet member 20, for example, and has a center interval of, for example, about 300 (μm) equal to the center interval of the lattice, in a direction perpendicular to the longitudinal direction of the partition wall 22. That is, it extends along a direction perpendicular to the longitudinal direction of the write electrode 28. In the longitudinal direction of the partition 22, the strip-shaped thick film conductors 52 are alternately provided with those connected to a common wiring and those connected to independent wirings.
[0023]
The dielectric film 48 has a thickness of, for example, about 10 to 30 (μm), for example, about 20 (μm), for example, PbO—B ₂ O ₃ —SiO ₂ —Al ₂ O ₃ —ZnO. -A thick film made of a glass having a low softening point, such as a TiO ₂ system or a combination thereof. The dielectric film 48 is provided for causing an AC discharge as described later by storing electric charges on the surface, but at the same time, by not exposing the conductor layer 44 made of a thick film material, It also has a role of suppressing an atmosphere change in the discharge space 24 due to outgas from these.
[0024]
The protective film 50 covering the dielectric film 48 has a thickness of, for example, about 0.5 (μm), and is a thin film or a thick film mainly composed of MgO 2 or the like. The protective film 50 prevents the dielectric film 48 from being sputtered by the discharge gas / ion. However, since the protective film 50 is formed of a dielectric material having a high secondary electron emission coefficient, a pair of discharges occurs between the opposing portions. It functions substantially as an electrode.
[0025]
The PDP 10 having the electrode structure as described above is operated as follows. That is, first, a predetermined AC pulse is applied to one of the thick film conductors 52 which is made independent, and sequentially scanned, and the data in the write electrode 28 is synchronized with the scanning timing. When a predetermined AC pulse is applied to a corresponding desired one (that is, a writing electrode corresponding to the one selected as a section to emit light), as shown by an arrow A in FIG. Is generated, and charges are accumulated on the protective film 50. After a predetermined AC pulse is applied between all the thick-film conductors 52 functioning as the scanning electrodes in this way and all the thick-film conductors 52 are scanned, light emission with accumulated charges is performed. In the section, since the potential due to the accumulated charge is superimposed on the applied voltage and exceeds the discharge starting voltage, a discharge is generated between the discharge surfaces 56 and 56 as shown by other arrows in FIG. It is maintained for a predetermined period of time by the newly generated wall charges and the like. As a result, the phosphor layers 32 and 36 in the section selected by the ultraviolet rays generated by the gas discharge are excited to emit light, and the light is emitted through the front plate 16 to display one image. Then, by changing the data-side electrode (writing electrode 28) to which the AC pulse is applied in each cycle of the scanning-side electrode, a desired image is continuously displayed. FIG. 4 is a diagram showing a cross section along the longitudinal direction of the partition wall 22 of the PDP 10, that is, a cross section perpendicular to the longitudinal direction of the thick film conductor 52.
[0026]
The sustain discharge is generated between the thick film conductors 52, 52. However, since the discharge space 24 is continuous along the longitudinal direction of the partition wall 22, the ultraviolet light generated by the discharge causes the band-shaped thick film to be generated in that direction. It extends outside the conductors 52,52. Therefore, the phosphor layers 32 and 36 located outside thereof are also allowed to emit light in the range where the ultraviolet rays reach. The division of the light emitting unit (cell) in the PDP 10 is divided by the partition wall 22 in a direction perpendicular to the partition wall 22, that is, in the horizontal direction in FIG. 4, and substantially in the longitudinal direction of the partition wall 22, that is, in the vertical direction in FIG. Is defined by the extent of the coverage. In this embodiment, the partition of the light-emitting section in the longitudinal direction of the partition wall 22, that is, the cell pitch is, for example, in the range of 100 (μm) to 3.0 (mm), for example, about 3.0 (mm). This corresponds to six times the center interval of the lattice of the member 20. That is, in this embodiment, six openings 42 of the grid of the sheet member 20 are provided in one cell, and sustain discharge is performed between three pairs of discharge surfaces 56 facing the six openings 42. As described above, the center interval of the partition walls 22 is about 1.0 (mm), and one pixel (pixel) is formed by three colors of RGB. Therefore, the pixel pitch is 3.0 in any of the two directions of the lattice. (Mm), and the size of one pixel is about 3.0 × 3.0 (mm). That is, in the PDP 10, one or a plurality of sets of the discharge spaces formed by the openings 42 of the grid of the sheet member 20 correspond to the pixels of the minimum light emission unit, and constitute the pixels of the display image. For example, in the case of monochrome display, one or an appropriate number of discharge spaces correspond to one pixel, and in the case of color display, for example, three or multiple discharge spaces whose emission colors are R, G, and B respectively are one. Configure the pixel. In this embodiment, the discharge space or pixel corresponds to a light emitting unit.
[0027]
FIG. 5 is a cross-sectional view of a main part cut in a direction parallel to the partition wall 22 to show an exhaust pipe 60 provided on the back surface of the PDP 10 for evacuating a discharge space in the PDP 10 to vacuum and enclosing a low-pressure gas. It is. In FIG. 5, a plurality of exhaust holes 62 are provided through the back plate 18 at positions corresponding to the intersections of the lattice-shaped sheet members 20 so as to cover the plurality of exhaust holes 62. Further, a cup-shaped end formed at one end of a glass exhaust pipe 60 is glass-welded, and a plurality of exhaust holes 62 are communicated with one exhaust pipe 60.
[0028]
FIG. 6 is a diagram illustrating a main part of a manufacturing process including a sealing process of the PDP 10, and FIG. 7 is a diagram illustrating a main part of a manufacturing process of the sheet member 20.
[0029]
In FIG. 6, in the processing step of the back plate 18, first, in the undercoat forming step P1, a thick-film insulator paste is applied to the inner surface 14 of the flat back plate 18 prepared in advance and baked. -The coat 26 is formed. Next, in the write electrode forming step P2, the write electrode 28 is formed on the under coat 26 with a thick film conductive material paste such as a thick film silver paste by using, for example, a thick film screen printing method or a lift-off method. You. In the subsequent overcoat formation step P3, a thick film insulating paste containing a low softening point glass and an inorganic filler is repeatedly applied over the substantially entire surface of the undercoat 26 from above the write electrode 28 and baked. 30 are formed. In the partition wall forming step P4, for example, a thick film insulating paste mainly containing low softening point glass and inorganic filler is applied by printing or the like, dried, and then baked at a temperature of, for example, about 500 to 650 (° C.). Thereby, the partition 22 is formed. If the desired height of the partition wall 22 cannot be ensured by one printing, printing and drying are repeated as many times as necessary. The same applies to the above-described undercoat forming step P1 to overcoat forming step P3. Then, in the phosphor layer forming step P5, three kinds of phosphor pastes corresponding to three colors of RGB are applied to predetermined positions defined for each color between the partition walls 22 by a thick film screen printing method or by pouring. Then, the phosphor layer 32 is provided by performing a baking treatment at a temperature of, for example, about 450 (° C.).
[0030]
On the other hand, in the processing step of the front plate 16, first, in the partition wall forming step P6, a thick film insulating paste mainly composed of, for example, a low softening point glass and an inorganic filler is applied by a thick film screen printing method as in the above step P4. Is repeatedly applied and dried on the inner surface 12 by using a thick film forming technique such as that described above, and further baked at a heat treatment temperature within a range of, for example, about 500 to 650 (° C.) determined according to the type of the thick film insulating paste. Thereby, the partition wall 34 is formed. Next, in the phosphor layer forming step P7, three kinds of phosphor pastes corresponding to the three colors of RGB are thick-film screen-printed or drop-printed from above the partition 34 at predetermined positions between the partitions 34 and determined for each color. The phosphor layer 36 is provided by applying such a method and baking at a temperature of, for example, about 450 (° C.).
[0031]
Then, the front plate 16 and the back plate 18 are overlapped with each other via the sheet member 20 produced in the sheet member producing step P8, and a heat treatment is performed in the sealing step P9, whereby the sealing glass previously applied to the interface therebetween is provided. These are hermetically sealed with a sealing agent 54 such as. Prior to the sealing, the sheet member 20 is fixed to one of the front plate 16 and the back plate 18 using a glass frit or the like, if necessary. Then, in the exhaust / gas sealing step P10, the PDP 10 is obtained by being evacuated from the airtight container formed by the front plate 16 and the back plate 18 via the exhaust pipe 60 and filling a predetermined discharge gas.
[0032]
In the above manufacturing process, the sheet member manufacturing process P8 is performed according to a process to which a well-known thick film printing technique is applied, for example, a process illustrated in FIG. That is, in step PA1 of preparing a substrate, a substrate 80 on which thick film printing is to be performed is prepared, and then, in step PA2 of forming a release layer, a glass frit having a high softening point and a high melting point containing a ceramic filler such as silica, alumina or zirconia are used. A release layer in which particles are bonded with a resin is provided on the surface 82 of the substrate with a thickness of, for example, about 5 to 50 (μm), preferably about 10 to 20 (μm). In the subsequent thick film paste layer forming step PA3, a thick film dielectric paste for forming the dielectric layer, which is the main body of the sheet member 20, and a thick film conductor paste for forming the thick film conductor 52 are screen-printed or the like. Is applied and dried in a predetermined pattern on the release layer sequentially. As a result, an unsintered product of the grid-like sheet member 20 in which a number of thick film conductors 52 arranged in one direction are buried is formed. After the substrate is subjected to a heat treatment at a firing temperature of, for example, about 585 (° C.) in the firing step PA4, the sheet member 20 made of the sintered thick film material is peeled from the peeling layer in the peeling step PA5. Then, in the dielectric paste coating step PA6, by dipping the delaminated sheet member 20 in the dielectric paste stored in a dipping tank, for example, _{PbO-B 2 O 3 -SiO 2} -Al 2 O 3 - A dielectric paste in which a glass powder such as a ZnO-TiO ₂ system or a combination thereof and a resin such as PVA are dispersed in a solvent such as water is applied to the entire outer peripheral surface. Next, after a baking process is performed at a predetermined temperature of, for example, about 550 to 580 (° C.) in a baking process PA7, a dipping process and a baking process are performed on the surface of the dielectric film 48 in the protective film forming process PA8. The protective member 50 is provided on substantially the entire surface with a desired thickness dimension by a thin film process such as an electron beam method or sputtering, whereby the sheet member 20 is obtained.
[0033]
In the above manufacturing process, the firing shrinkage ratio during sintering of the thick film dielectric paste for forming the main body of the sheet member 20 is larger than that of the thick film conductor paste for forming the thick film conductor 52. As described above, the fired sheet member 20 has a periodically varying thickness dimension. For this reason, in the structure of the PDP 10 in which the sheet member 20 is sandwiched between the front plate 16 and the back plate 18, as shown in FIG. 5, the sheet member 20 is connected to the partition 22 of the back plate 18 and the partition 34 of the front plate 16. Since the gap S resulting from the periodic change in the thickness of the sheet member 20 is formed between the partition walls 22 and 34 without contact, the exhaust resistance of the discharge space in the opening 42 of the sheet member 20 decreases, The evacuation efficiency in the evacuation process P10 is high, and a sufficient degree of vacuum can be obtained by evacuation in a short time.
[0034]
As described above, according to this embodiment, since the sheet member 20 provided between the front plate 16 and the back plate 18 has a thickness that changes periodically, the sheet member 20 and the front plate 16 When the air is exhausted through the exhaust holes 62 formed through the rear plate 18, the exhaust from the respective discharge spaces defined by the grid-like sheet members 20 is reduced because the contact area with the rear plate 18 is reduced. It becomes easy and even if the exhaust work is performed efficiently, the exhaust is sufficient and the quality of the PDP (flat panel display) 10 is not impaired.
[0035]
Further, according to the present embodiment, since the thickness of the sheet member 20 changes at a period equivalent to the period of the lattice of the sheet member 20, each discharge space defined by the lattice-like sheet member 20 is formed. Is easily communicated with the exhaust hole 62 and the exhaust pipe 60.
[0036]
According to the present embodiment, the thickness of the sheet member 20 changes periodically in a direction orthogonal to the direction of the thick film conductor 52 embedded in the sheet member 20. By forming the material 20 from a material having a higher firing shrinkage than the thick film conductor 52 embedded therein, a periodic thickness change can be easily provided to the sheet member 20.
[0037]
Further, according to the present embodiment, the thickness of the sheet member 20 is periodically changed by the unevenness on both surfaces. However, the thickness may be periodically changed by the unevenness on one surface. Further, the periodic change in the thickness of the sheet member 20 is not necessarily a constant period, but the thickness of the sheet member 20 is changed by irregularities having a certain different period so as to form a gap S for reducing exhaust resistance. You may.
[0038]
Further, according to the present embodiment, the back plate 18 has a plurality of exhaust holes 62 formed at positions corresponding to the intersections of the lattice-shaped sheet members 20 so as to pass therethrough. Since the position of the exhaust hole 62 is not easily seen from the opening of the grid-like sheet member 20 constituting the pixel for displaying an image, that is, from the front surface of the PDP 10, the display quality is improved.
[0039]
Further, according to the present embodiment, since the single exhaust pipe 60 is connected to the rear surface of the rear plate 18 and communicates with the plurality of exhaust holes 62 formed in the rear plate 18, the single exhaust pipe 60 is provided. By using the exhaust pipe 60, exhaust is performed from the discharge space between the front plate 16 and the rear plate 18 through the plurality of exhaust holes 62, so that the exhaust efficiency is improved.
[0040]
As described above, the present invention has been described in detail with reference to the drawings. However, the present invention can be implemented in other embodiments.
[0041]
For example, in the above-described embodiment, the thickness changes at a period equivalent to the period of the lattice of the sheet member 20, but the period may be longer or shorter than the period of the lattice. Preferably, in consideration of the strength of the sheet member 20 which is a sintered product, the thickness of the sheet member 20 desirably changes at a cycle equal to or less than the cycle of the lattice.
[0042]
Further, in the sheet member 20 of the above-described embodiment, the firing shrinkage of the thick film dielectric paste for forming the main body is set to be larger than the firing shrinkage of the thick film conductor paste for forming the thick film conductor 52. Although the thickness changes periodically after baking, the thickness may be changed by machining, etching, or the like.
[0043]
Further, in the embodiment, the case where the present invention is applied to the AC type PDP 10 for color display and the sealing method thereof has been described. However, the present invention relates to a flat panel display device which requires a sealing structure at the outer peripheral end. If so, the internal electrode configuration and the like are not particularly limited, and the present invention is similarly applied not only to the AC type PDP for monochrome display, but also to other types of display devices such as LCD, FED, and SED. That is, the present invention is not limited to the one provided with the sheet member 20, and can be applied to a PDP having a conventional three-electrode surface discharge structure.
[0044]
Further, the PDP 10 of the embodiment is of a type that includes three color phosphor layers 32 and 36 to perform full color display. However, the present invention relates to a display device including one or two color phosphor layers. The same applies to. Further, the present invention is similarly applied to a structure in which a phosphor layer is provided only on one of the inner surfaces of the front plate 12 and the back plate 14.
[0045]
Although not specifically exemplified, the present invention can be variously modified without departing from the gist thereof.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an entire flat panel display (PDP) according to an embodiment of the present invention.
FIG. 2 is a view for explaining an internal structure of the PDP of FIG.
FIG. 3 is a diagram illustrating a structure of a thick film sheet member provided inside the PDP of FIG.
FIG. 4 is a sectional view for explaining the operation of the PDP of FIG. 1;
FIG. 5 is a cross-sectional view of a main part illustrating an exhaust pipe provided on the back surface of the PDP of FIG. 1 and a plurality of exhaust holes formed in a back plate so as to communicate therewith.
FIG. 6 is a process diagram illustrating a main part of a manufacturing process of the PDP of FIG. 1;
FIG. 7 is a diagram for explaining in detail a sheet member forming step of FIG. 6;
[Explanation of symbols]
10: PDP
12: Front plate 14: Back plate 20: Sheet member 24: Discharge space (airtight space)
28: Write electrode 34: Partition wall 42: Opening of sheet member 52: Thick film conductor 60: Exhaust pipe 62: Exhaust hole

Claims (5)

A transparent front plate, a back plate disposed parallel to the front plate at a predetermined distance from the front plate, and a lattice formed of a thick film dielectric having a predetermined thickness and disposed in parallel between the front plate and the back plate. And a plurality of pairs of discharge electrodes provided on the sheet member and facing each other across the discharge space in each of the plurality of discharge spaces defined by the sheet member, and in one direction of the grid of the sheet member. A plurality of thick-film conductors embedded in the sheet member so as to extend in parallel with each other along with a writing member arranged on the back plate so as to extend in parallel to the other direction of the lattice of the sheet member. An AC-type discharge display device comprising: an electrode;
The sheet member in which the thick film conductor is embedded has a thickness that changes periodically in another direction of the lattice. 2. The flat panel display according to claim 1, wherein the thickness of the sheet member changes at a cycle equal to or less than a cycle of a lattice of the sheet member. 3. The flat panel display according to claim 1, wherein the thickness of the sheet member changes periodically in a direction orthogonal to the direction of the thick film conductor embedded in the sheet member. 4. The flat panel display according to claim 1, wherein the back plate has a plurality of exhaust holes formed at positions corresponding to intersections of the lattice-shaped sheet members. apparatus. 5. The flat panel display according to claim 1, further comprising a single exhaust pipe connected to a rear surface of said rear plate and communicating with a plurality of exhaust holes formed in said rear plate.

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