JP4048909B2 - Plasma display panel and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a plasma display panel (hereinafter referred to as PDP) known as a thin, lightweight display device with a large screen.And manufacturing method thereofIt is about.
[0002]
[Prior art]
  In recent years, PDPs have attracted attention as display panels (thin display devices) with excellent visibility.
[0003]
  This PDP is roughly classified into an AC type and a DC type in terms of driving, and there are two types of discharge types, a surface discharge type and a counter discharge type. From the viewpoint of high definition, large screen, and ease of manufacture, At present, AC type and surface discharge type PDPs have become the mainstream.
[0004]
  The structure is such that a front substrate having a plurality of display electrodes composed of scan electrodes and sustain electrodes and a back substrate having a plurality of data electrodes orthogonal to the display electrodes are opposed to each other with a partition formed on the back substrate interposed therebetween, for example. As a result, a discharge cell is formed at the intersection of the display electrode and the data electrode, and a phosphor layer is provided in the discharge cell.
[0005]
  A discharge gas is enclosed in the discharge cell, and a discharge is generated by a periodic voltage applied between the display electrode and the data electrode. Is generated and image display is performed (see, for example, Non-Patent Document 1).
[0006]
[Non-Patent Document 1]
      Co-authored by Hioki Uchiike and Shigeo Miko “All about Plasma Displays”, Industrial Research Council, Inc., May 1, 1997, for example, p79-p80
[0007]
[Problems to be solved by the invention]
  According to the study by the present inventors, in the PDP having the above-described structure, it has been found that when the image display is performed in an environment with a low atmospheric pressure, for example, at a high altitude, the PDP main body may generate noise. . This noise is very harsh when the sound pressure exceeds 30 dB, and the quality of the product is remarkably lowered.
[0008]
  Here, the cause of the noise as described above is considered as follows. That is, the discharge gas is sealed in the PDP at about 500 Torr, that is, a pressure lower than the atmospheric pressure, and the front substrate and the rear substrate are in pressure contact with the partition wall sandwiched by the pressure difference between the inside and outside of the PDP. However, in areas where the atmospheric pressure is low, for example, at high altitudes, the pressure difference between the inside and outside of the PDP becomes small, so the pressure contact between the front and back boards becomes weak, and the front and back board substrates themselves Depending on the flatness, a gap may be formed between the partition formed on the back substrate and the front substrate. Here, during driving, a periodic voltage is applied between the display electrode and the data electrode, whereby a periodic attractive force and / or repulsive force acts between the front substrate and the rear substrate. However, when there is a gap as described above, the front substrate and / or the back substrate vibrate, and noise is generated along with the vibration.
[0009]
  The present invention has been made in view of the above problems, and an object of the present invention is to realize a PDP that suppresses noise generated during driving by sufficiently securing the force with which the front substrate and the rear substrate are pressed against each other by a partition wall. To do.
[0010]
[Means for Solving the Problems]
  In order to achieve the above object, the plasma display panel of the present invention comprises:A plasma display panel having a front substrate and a rear substrate facing each other with a partition wall interposed therebetween, wherein the front substrate and the rear substrate are sealed by a sealing member outside the image display region, and the sealing member is in the height direction thereof A sealing material and a gap member are laminated, and the height of the sealing member is higher than the height of the partition wall, and only the portion outside the image display area of the front substrate is recessed inside the plasma display panel. The image display area of the front substrate and the rear substrate are substantially flat..
[0011]
  In order to achieve the above object, a method for manufacturing a plasma display panel of the present invention includes:A sealing member having a structure in which a sealing material and a gap member are stacked in the height direction, and the height of the sealing member is higher than the height of the partition wall, the end portion of the portion where the front substrate and the rear substrate overlap outside the image display area. The front substrate and the partition wall are in contact with each other with the step of forming in the vicinity, the step of causing the front substrate and the rear substrate to overlap and face each other via the sealing member, and the state in which the rear substrate is kept substantially flat. The step of elastically deforming only the portion outside the image display area of the front substrate into a concave shape inside the plasma display panel by applying a load to the front substrate, and the sealing member while maintaining this state Melting the sealing material of and sealing the front substrate and the rear substrate..
[0012]
DETAILED DESCRIPTION OF THE INVENTION
  That is, the invention described in claim 1 of the present invention isA plasma display panel having a front substrate and a rear substrate facing each other with a partition wall interposed therebetween, wherein the front substrate and the rear substrate are sealed by a sealing member outside the image display region, and the sealing member is in the height direction thereof A sealing material and a gap member are laminated, and the height of the sealing member is higher than the height of the partition wall, and only the portion outside the image display area of the front substrate is recessed inside the plasma display panel. Is a plasma display panel that is elastically deformed into a shape, and the image display area of the front substrate and the rear substrate are substantially flat..
[0013]
  The invention according to claim 2Structure in which sealing material and gap member are stacked in the height direction And forming a sealing member whose height is higher than the height of the partition wall in the vicinity of the end portion of the portion where the front substrate and the rear substrate overlap outside the image display area, and the front substrate and the rear substrate. From the state of overlapping and facing each other through the sealing member, and applying the load to the front substrate so that the front substrate and the partition wall are in contact with each other while keeping the rear substrate substantially flat. The step of elastically deforming only the portion outside the display area into a concave shape inside the plasma display panel, and while maintaining this state, the sealing material of the sealing member is melted to bond the front substrate and the rear substrate. And a step of sealing the plasma display panel..
[0014]
  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0015]
  FIG. 1 is a plan view showing a schematic structure of a PDP according to an embodiment of the present invention. FIG. 2 is a cross-sectional perspective view showing a schematic configuration of a part of the image display area of the PDP according to the embodiment of the present invention.
[0016]
  The PDP 1 has a structure in which a pair of front substrate 2 (FIG. 2) and rear substrate 3 face each other with a partition wall 4 (FIG. 2) interposed therebetween.
[0017]
  The front substrate 2 is composed of N scanning electrodes 6 and N sustaining electrodes 7 formed on one main surface of the front glass substrate 5, and display electrodes 8 (the numbers are attached when the Nth is shown); This structure has a dielectric layer 9 formed so as to cover the display electrode 8 and a protective layer 10 made of MgO, for example, so as to cover the dielectric layer 9. Scan electrode 6 and sustain electrode 7 have a structure in which bus electrodes 6b and 7b are laminated on transparent electrodes 6a and 7a.
[0018]
  The back substrate 3 is composed of M data electrodes 12 formed on one main surface of the back glass substrate 11 (the number is attached when the M-th is shown), and a dielectric layer formed so as to cover the data electrodes 12 13 and the partition 4 formed at a position corresponding to the space between the data electrodes 12 on the dielectric layer 13 and the phosphor layers 14R, 14G, and 14B formed between the partitions 4.
[0019]
  The front substrate 2 and the rear substrate 3 are opposed to each other with the partition wall 4 interposed therebetween so that the display electrode 8 and the data electrode 12 are orthogonal to each other, and the periphery is sealed in a region outside the image display region 15 (FIG. 1). The structure is sealed by the member 16 (FIG. 1). In the discharge space 17 formed by the front substrate 2, the rear substrate 3, and the barrier ribs, for example, a discharge gas of 5% Ne—Xe is 66.5 kPa (500 Torr). It is sealed with pressure.
[0020]
  The discharge space 17 where the display electrode 8 and the data electrode 12 intersect acts as a discharge cell 18 (unit light emitting region). That is, in the discharge cell 18 to be lit, a discharge is generated by applying a periodic voltage between the display electrode 8 and the data electrode and between the scan electrode 6 and the sustain electrode 7 of the display electrode 8. Then, the phosphor layers 14R, 14G, and 14B are excited by ultraviolet rays generated by this discharge to generate visible light. Then, image display is performed by a combination of lighting and non-lighting of the discharge cells 18 of the respective colors.
[0021]
  Here, FIG. 3 shows a schematic configuration of a cross section of the PDP 1 in the longitudinal direction of the partition wall 4 (Y direction in FIG. 2). In FIG. 3, for simplification of description, the front glass substrate 5 and the dielectric layer 9 are used as the front substrate 2, the rear glass substrate 11, the partition walls 4 and the dielectric layer 13 are used as the rear substrate 3, and the front substrate 2 and the back surface are used. Only the sealing member 16 that seals the substrate 3 is shown.
[0022]
  In the present embodiment, the sealing member 16 includes a sealing material 16a and a gap member 16b, and has a height H₁₆(The sum of the height of the gap member 16b and the thickness of the sealing material 16a) is the height H of the partition wall 4₄By configuring higher, the portion outside the image display area 15 of the front substrate 2 is sealed in a shape that is recessed inside the PDP 1, that is, elastically deformed into a shape recessed inside the PDP 1. It is a thing.
[0023]
  With this configuration, at least one of the front substrate 2 and the rear substrate 3 has a force that causes the front substrate 2 and the rear substrate 3 to be in pressure contact with the partition wall 4.
[0024]
  Further, since the inherent force as described above is generated only by elastic deformation outside the image display region 15, the substantially flatness of the image display region 15 of the PDP 1 can be maintained. That is, the front substrate 2 and the rear substrate 3 are maintained while maintaining the features such as the fact that the image display area 15 originally possessed by the PDP 1 is substantially flat, so that the transfer of external light and the like is small and the image distortion is small. It is possible to increase the force with which the wall 4 is pressed by the partition wall 4.
[0025]
  Here, the height H of the sealing member 16₁₆Is the height H of the bulkhead 4 over its entire width.₄It is not necessary to make the height higher, and the height H of the partition wall 4 can be increased by a single point in the width of the sealing member 16.₄It is enough if there is a higher place.
[0026]
  The sealing material 16a is, for example, a low-melting glass material, and the gap member 16b is a material that does not melt at the melting temperature in the sealing process of the sealing material 16a. Since the sealing member 16 has the above-described configuration and material, the gap member 16b can ensure the minimum height of the sealing member 16 after the sealing step. The height H that is the sum of the height of the gap member 16b and the thickness of the sealing material 16a can be obtained reliably.₁₆Is the height H of the partition 4₄It can be configured to be more surely high. And if the required height H of the sealing member 16₁₆Can be ensured only by the sealing material 16a, the gap member 16b is unnecessary.
[0027]
  Here, examples of the material that does not melt during the sealing step of the sealing material 16 a include the material of the partition wall 11. Therefore, in order to obtain the sealing member 16 as described above, the step of forming the partition wall 4. The gap member 16b may be formed at the same time, and then the sealing material 16a may be applied thereon.
[0028]
  Further, the gap member 16b in the sealing member 16 does not need to be continuously in the sealing member 16, a predetermined gap at the sealing portion is ensured, and the sealing performance by the adhesive material 16a is not affected. For example, the gap member 16b may be in a state where the gap member 16b enters the sealing member 16 discretely.
[0029]
  The PDP 1 manufactured as described above is configured by sealing at least one of the front substrate 2 and the rear substrate 3 in a state in which a portion outside the image display region 15 is elastically deformed into a concave shape inside the PDP 1. Therefore, in addition to the pressure difference between the inside and outside of the PDP 1, the force that the front substrate 2 and the back substrate 3 are pressed against each other by the partition wall 4 includes at least one of the front substrate 2 and the back substrate 3. Even if the atmospheric pressure difference becomes small, a gap is hardly formed between the front substrate 2 and the partition wall 3, and as a result, it is possible to suppress the occurrence of noise considered to be caused by the gap.
[0030]
  In the above description, as shown in FIG. 3, as a configuration in which at least one of the front substrate 2 and the rear substrate 3 has a force that allows the front substrate 2 and the rear substrate 3 to be in pressure contact with the partition walls 4, Although the configuration in which the portion outside the image display area 15 of the front substrate 2 is sealed in a state of being elastically deformed into a concave shape inside the PDP 1 is shown, the configuration is not limited to such a configuration. 16 height H₁₆The height H of the partition wall 4₄By configuring higher, as shown in FIG. 4, the portion outside the image display region 15 of the back substrate 3 is sealed and configured in a state of being elastically deformed into a concave shape inside the PDP 1, As shown in FIG. 5, the portion outside the image display area 15 of both the front substrate 2 and the rear substrate 3 is sealed in a state of being elastically deformed into a concave shape inside the PDP 1. Even if it exists, the same effect can be acquired.
[0031]
  In the above description, the shape of the elastic deformation in the portion outside the image display area 15 of at least one of the front substrate 2 and the rear substrate 3 is such that the front substrate 2 and the rear substrate 3 are in pressure contact with the partition 4. As long as such a force is contained in at least one of the front substrate 2 and the rear substrate 3, the shape need not be concave on the inside of the PDP 1.
[0032]
  Further, as another example of the configuration of the sealing member 16, for example, a gap member 16 b as shown in FIG. 6 or a gap member 16 b as shown in FIG. It may be a separate part in which the sealing material 16a is applied around the gap member 16b of the separate part. When the gap member 16b is a separate part, the cross-sectional shape is preferably not a circle but a polygon from the viewpoint of stability at the time of disposition, and the material is a low-melting-point glass material that is the sealing material 16a or the front surface. For example, an invar material or a ceramic material having a thermal expansion coefficient close to that of the glass substrate 5 or the back glass substrate 11 is preferable. A configuration in which the dielectric layer 9 is a part of the gap member 16b is also possible.
[0033]
  Further, the configuration shown in FIG. 8 is a configuration in which the positions of the gap member 16b and the sealing material 16a are shifted, that is, the sealing material 16a is formed inside the gap member 16b, or vice versa. With such a configuration, the gap member 16b does not exist in the sealing portion of the sealing member 16, and only the sealing material 16a is formed, which impairs the bonding strength or sealing reliability at the sealing portion. Therefore, the certainty of securing the gap can be obtained. Here, the gap member 16b may be a part of the partition 4, the dielectric layer 9, and the dielectric layer 13, or may be a separate member.
[0034]
  However, even if the sealing member 16 has any structure as described above, its height H₁₆(The sum of the height of the gap member 16b and the thickness of the sealing material 16a) is the height H of the partition wall 4₄It is necessary to make it higher.
[0035]
  FIG. 9 is a perspective view showing a schematic configuration of the plasma display device 50 manufactured using the PDP 1 according to the embodiment of the present invention, in which components are disassembled. The housing that accommodates the PDP 1 includes a front frame 51 and a metal back cover 52, and a front cover 53 made of glass or the like that also serves as an optical filter and PDP 1 protection is disposed in the opening of the front frame 51. ing. The front cover 53 is subjected to, for example, silver vapor deposition in order to suppress unnecessary radiation of electromagnetic waves. Further, the back cover 52 is provided with a plurality of vent holes 52a for releasing heat generated in the PDP 1 or the like to the outside.
[0036]
  The PDP 1 is held by adhering to the front surface of a chassis member 54 made of aluminum or the like via a heat conductive sheet 55, and a plurality of circuit blocks 56 for driving the PDP 1 to display are provided on the rear surface side of the chassis member 54. It is attached. The heat conductive sheet 55 is for efficiently transferring the heat generated in the PDP 1 to the chassis member 54 to radiate heat. Further, the circuit block 56 includes an electric circuit for performing display driving of the PDP 1 and its control. A plurality of electrode blocks extending to the edge of the PDP 1 extend beyond the edges of the four sides of the chassis member 54. Are electrically connected by a flexible wiring board (not shown).
[0037]
  A boss portion 54a for attaching the circuit block 56 and fixing the back cover 52 is protruded from the rear surface of the chassis member 54 by integral molding such as die casting. The chassis member 54 may be configured by fixing a fixing pin to an aluminum flat plate.
[0038]
  Since the plasma display device 50 configured as described above uses the PDP 1 according to the embodiment of the present invention, noise is generated even when used in an environment with high altitude and low atmospheric pressure. There is nothing.
[0039]
  Next, the manufacturing method of PDP1 mentioned above is demonstrated using FIG. 1, FIG.
[0040]
  The front substrate 2 is made of ITO or tin oxide (SnO) on one main surface of the front glass substrate 5.₂On each of the transparent electrodes 7a and 8a made of a transparent conductive material such as), a silver (Ag) thick film (thickness: 2 μm to 10 μm) or an aluminum (Al) thin film (thickness: 0.1 μm to 1 μm), Alternatively, bus electrodes 7b and 8b made of a Cr / Cu / Cr laminated thin film (thickness: 0.1 μm to 1 μm) are laminated to form scan electrode 7 and sustain electrode 8. When the bus electrodes 7b and 8b are composed of silver electrodes, for example, silver electrode ink containing an ultraviolet photosensitive resin is uniformly applied by a screen printing method and dried, followed by patterning and baking by exposure and development. Dielectric layer 9 covering scan electrode 7 and sustain electrode 8 is made of lead oxide (PbO) or bismuth oxide (Bi).₂O₃) Or phosphorus oxide (PO)₄) As a main component (for example, lead oxide (PbO) 70% by weight, boron oxide (B₂O₃) 15% by weight, silicon oxide (SiO₂15% by weight) is formed by screen printing (which can also be formed by die coating printing or film laminating method), which is made of a low melting point glass (thickness 20 μm to 50 μm). Next, a protective layer 10 (thickness: 100 nm to 1000 nm) made of, for example, MgO for protecting the dielectric layer 9 from plasma damage is formed by an electron beam evaporation method or a sputtering method. Thus, the front substrate 2 is manufactured.
[0041]
  On the other hand, the back substrate 3 is first formed on one main surface of the back glass substrate 11 with a silver (Ag) thick film (thickness: 2 μm to 10 μm), an aluminum (Al) thin film (thickness: 0.1 μm to 1 μm), or Data electrode 12 made of Cr / Cu / Cr laminated thin film (thickness: 0.1 μm to 1 μm) and lead oxide (PbO) or bismuth oxide (Bi)₂O₃) Or phosphorus oxide (PO)₄A dielectric layer 13 made of low melting point glass (thickness: 5 μm to 20 μm) having as a main component is formed. Further, partition walls 4 mainly composed of glass are formed at a predetermined pitch between the data electrodes 12 on the dielectric layer 13, and further, red phosphors and green phosphors are formed in the spaces sandwiched by the partition walls 4. The back substrate 2 is produced by forming the phosphor layers 14R, 14G, and 14B of the body and the blue phosphor. Here, the dielectric layer 13 is for improving the adhesion with the partition walls 4 and may be omitted as long as the adhesion between the partition walls 4 and the rear glass substrate 11 is ensured. .
[0042]
  The phosphor layers 14R, 14G, and 14B are respectively formed by applying a red phosphor (R), green phosphor (G), and blue phosphor (B) powder in a vehicle and applying a paste to the paste by an ink ejection method. To do. As phosphors of the respective colors, the following phosphor materials generally used for plasma display panels can be used. That is, as a red phosphor, (Y_XGd_1-X) BO₃: Eu³⁺Or YBO₃: Eu³⁺As the green phosphor, BaAl₁₂O₁₉: Mn or Zn₂SiO₄: Mn, BaMgAl as blue phosphor₁₀O₁₇: Eu²⁺It is.
[0043]
  Further, the sealing member 16 for sealing the front substrate 2 and the rear substrate 3 is, as shown in FIG. 3, a terminal portion of the portion where the front substrate 2 and the rear substrate 3 overlap outside the image display area 15. Form in the vicinity. The sealing member 16 has a structure having a sealing material 16a and a gap member 16b, and the gap member 16b is a material that does not melt during the sealing process, for example, the same material as the partition wall 11. This is to increase the certainty of the height of the sealing member 16 after the sealing step. Therefore, the gap member 16b may be formed simultaneously with the step of forming the partition wall 4, and then the sealing material 16a may be applied thereon. The sealing material 16a is, for example, a low melting point glass material.
[0044]
  Another example of the configuration of the sealing member 16 is a configuration in which a part of the dielectric layer 13 is a gap member 16b as shown in FIG. 6, for example. In this case, when the dielectric layer 13 of the back substrate 3 is formed, the gap member 16b is formed at the same time, and then the sealing material 16a is applied thereon. A configuration in which the dielectric layer 9 is a part of the gap member 16b is also possible.
[0045]
  As another example of the structure of the sealing member 16, as shown in FIG. 7, the gap member 16b is a separate part, and a sealing material 16a is applied around the gap member 16b of the separate part. It doesn't matter. In this case, from the viewpoint of stability at the time of arrangement, the cross-sectional shape is preferably not a circle but a polygon, and the material is a low-melting-point glass material that is the sealing material 16a, the front glass substrate 5, or the back surface. For example, an invar material or a ceramic material having a thermal expansion coefficient close to that of the glass substrate 11 is preferable. The sealing material 16a may be applied in advance around the gap member 16b, or may be applied in advance to a portion to be a sealing portion at the end edge of the front glass substrate 5 and / or the rear glass substrate 11, Alternatively, the gap member 16b may be provided.
[0046]
  Furthermore, as another example of the structure of the sealing member 16, a sealing material 16a is formed inside the gap member 16b at a portion where the front substrate 2 and the rear substrate 3 are sealed as shown in FIG. There is a configuration. In this case, the gap member 16b may be a part of the partition wall 4, the dielectric layer 9, and the dielectric layer 13, or may be a separate member, but the sealing material 16a and the gap as shown in FIG. It is necessary to configure the sealing member 16 in a positional relationship with the member 16b.
[0047]
  Moreover, even if it is the sealing member 16 of any structure above, the height H₁₆(The sum of the height of the gap member 16b and the thickness of the sealing material 16a) is the height H of the partition wall 4₄It is necessary to make it higher.
[0048]
  Then, the front substrate 2 and the back substrate 3 produced as described above are bonded together by the sealing member 16 and sealed.
[0049]
  For example, as shown in FIG. 10A, in the initial state in which the front substrate 2 and the rear substrate 3 are overlapped with each other via the sealing member 16, the front substrate 2 and the partition wall 4 are arranged. In this state, as shown in FIG. 10 (b), the front substrate 2 and the partition 4 are brought into contact with each other by applying a load F to the front substrate 2 while keeping the rear substrate 3 flat. To be elastically deformed. In this state, the image display area 15 of the front substrate 2 is substantially flat following the upper end surface of the partition wall 4, and outside the image display area 15, the shape is concave on the inner surface of the PDP 1 from the partition wall 4 to the sealing member 16. The state is elastically deformed.
[0050]
  Then, while maintaining this state, the front substrate 2 and the rear substrate 3 that melt the sealing material 16a of the sealing member 16 are sealed in a so-called sealing step, so that the image display area 15 of the PDP 1 is abbreviated. While maintaining the flatness, it is possible to obtain a PDP 1 in which a force that allows the front substrate 2 and the rear substrate 3 to be in pressure contact with the partition walls 4 is applied to at least one of the front substrate 2 and the rear substrate 3 (see FIG. 10 (c)).
[0051]
  Thereafter, the inside of the discharge cell 18 which is the discharge space 17 partitioned by the barrier ribs 4 is once subjected to high vacuum (1 × 10^-4After evacuation to Pa), for example, a mixed gas of neon gas and xenon gas is sealed at 95% by volume, 5%, and the pressure is 66.5 kPa (500 Torr) to complete the PDP 1.
[0052]
  In the PDP manufactured as described above, since at least one of the front substrate 2 and the rear substrate 3 is sealed in a state in which a portion outside the image display region 15 is elastically deformed, the image display region 15 has a substantially flatness. While being ensured, the front substrate 2 and the rear substrate 3 have a structure in which stress is brought into pressure contact with the partition wall 4. Therefore, even if the pressure difference between the inside and outside of the PDP becomes small, a gap is hardly generated between the front substrate 2 and the partition wall 4, and as a result, it is possible to suppress the occurrence of noise that is considered to be caused by the gap.
[0053]
  The plasma display device 50 using the PDP 1 manufactured based on the above-described embodiment is disposed in the depressurization tank 100 as shown in FIG. 11, and a periodic voltage is applied to the display electrode 8 and the data electrode 12. The image was displayed by a normal driving method. At the same time, the pressure in the depressurization tank 100 is reduced by the vacuum pump 101, the pressure in the depressurization tank 100 is monitored by the pressure gauge 102, and noise generated from the PDP 1 is collected by the microphone 103, and the noise measuring device 104 The sound pressure was measured at
[0054]
  In the above experiment, as a result of converting the pressure in the depressurization tank 100 where the noise is generated from the plasma display device 50 from the correlation between the altitude and the atmospheric pressure, the altitude at which noise exceeding 30 dB is generated is 3000 m. It was confirmed. On the other hand, when the same experiment was performed on a PDP having a conventional configuration, it was confirmed that noise exceeding 30 dB was generated in a state where the pressure in the depressurization tank 100 corresponds to an altitude of 2000 m. As described above, the reason why the noise generation altitude of the PDP 1 of the present invention is higher than that of the conventional PDP is that at least one of the front substrate 2 and the rear substrate 3 is separated from the pressure difference between the inside and outside of the PDP 1. And the back substrate 3 have a force that presses them with the partition wall 4, so that even if the pressure difference between the inside and outside of the PDP becomes small, a gap is hardly generated between the front substrate 2 and the partition wall 4. This is probably because of this.
[0055]
【The invention's effect】
  As described above, according to the present invention, it is possible to realize a PDP capable of suppressing noise generated during driving while maintaining the substantially flatness of the image display area.
[Brief description of the drawings]
FIG. 1 is a plan view showing a schematic structure of a plasma display panel according to an embodiment of the present invention.
FIG. 2 is a cross-sectional perspective view showing a schematic configuration of part of an image display region of a plasma display panel according to an embodiment of the present invention.
FIG. 3 is a sectional view showing a schematic configuration of a plasma display panel according to an embodiment of the present invention.
FIG. 4 is a sectional view showing a schematic configuration of a plasma display panel according to another embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a schematic configuration of a plasma display panel according to another embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a schematic configuration of a plasma display panel according to another embodiment of the present invention.
FIG. 7 is a cross-sectional view showing a schematic configuration of a plasma display panel according to another embodiment of the present invention.
FIG. 8 is a cross-sectional view showing a schematic configuration of a plasma display panel according to another embodiment of the present invention.
FIG. 9 is a perspective view showing a schematic configuration of a plasma display device using a plasma display panel according to an embodiment of the present invention.
FIG. 10 is a diagram showing a schematic flow of a method for manufacturing a plasma display panel according to an embodiment of the present invention.
FIG. 11 is a diagram showing a schematic configuration of an experimental apparatus for evaluating the performance of a plasma display device using a plasma display panel according to an embodiment of the present invention.
[Explanation of symbols]
  1 Plasma display panel
  2 Front substrate
  3 Back substrate
  4 Bulkhead
  5 Front glass substrate
  9 Dielectric layer
  11 Back glass substrate
  13 Dielectric layer
  15 Image display area
  16 Sealing material
  16a Sealing material
  16b Gap member

Claims (2)

A plasma display panel having a front substrate and a rear substrate facing each other with a partition wall interposed therebetween,
The front substrate and the rear substrate are sealed by a sealing member outside the image display area,
The sealing member is a structure in which a sealing material and a gap member are laminated in the height direction,
The height of the sealing member is configured to be higher than the height of the partition wall,
Only the part outside the image display area of the front substrate is elastically deformed into a concave shape inside the plasma display panel,
The image display area of the front substrate and the rear substrate are substantially flat.
Plasma display panel . A sealing member having a structure in which a sealing material and a gap member are stacked in the height direction, and the height of the sealing member is higher than the height of the partition wall, the end portion of the portion where the front substrate and the rear substrate overlap outside the image display area. Forming in the vicinity,
Superposing and facing the front substrate and the rear substrate through the sealing member;
From this state, by applying a load to the front substrate so that the front substrate and the bulkhead are in contact with each other while keeping the rear substrate substantially flat, only the portion outside the image display area of the front substrate is placed inside the plasma display panel. Elastically deforming into a concave shape;
While maintaining this state, melting the sealing material of the sealing member to seal the front substrate and the rear substrate;
A method of manufacturing a plasma display panel comprising:

Images