WO2010073321A1

WO2010073321A1 - Plasma display device

Info

Publication number: WO2010073321A1
Application number: PCT/JP2008/073426
Authority: WO
Inventors: 伸芳田中; 希志郎永井
Original assignee: 日立プラズマディスプレイ株式会社
Priority date: 2008-12-24
Filing date: 2008-12-24
Publication date: 2010-07-01

Abstract

The outer edge of a partition wall forming area (33) is positioned in a non-display area (31). In a plurality of cells partitioned by partition walls (22), first phosphors (23) formed in first cells (25) disposed in a display area (30), second phosphors (34) formed in second cells (36) so disposed as to surround the first cells (25) disposed outside the outermost periphery of the display area (30), and third phosphors (35) formed in third cells (38) disposed between the second cells (36) and a vent hole (37) are formed. With this constitution, the impurity gas intruded through the vent hole in the process of introducing a discharge gas can be adsorbed by the third phosphors (35).

Description

Plasma display device

The present invention relates to a technology of a plasma display device, and more particularly to a technology effective when applied to an improvement in display quality of a plasma display device.

There is a plasma display device (hereinafter referred to as a PDP device) as a kind of flat display device called FPD (Flat Panel Display). A plasma display panel (PDP; Plasma Display Panel) incorporated in a PDP apparatus generates a gas discharge in a discharge cell formed between a pair of substrates arranged opposite to each other. Is a display panel that forms a desired image.

The discharge cell is filled with a gas called a discharge gas, for example, a rare gas, but the discharge filled in the panel from the viewpoint of stabilizing the discharge characteristics or suppressing changes in characteristics over time. It is preferable to improve the purity of the gas. The following techniques have been studied as techniques for improving the purity of the discharge gas in the panel, that is, for removing the impurity gas in the panel.

For example, Japanese Patent No. 3564783 (Patent Document 1) describes a configuration in which a protective wall for bypassing an exhaust and gas filling path (flow path) is provided in the vicinity of a vent hole filled with a discharge gas. Yes.

Further, for example, in Japanese Patent Application Laid-Open No. 11-329246 (Patent Document 2), a getter material (adsorbing material) is disposed in a vacuum exhaust pipe (chip pipe) connected to a panel and activated, thereby causing an impurity gas. A configuration for removing is described.
Japanese Patent No. 3564783 JP 11-329246 A

In the PDP, increasing the purity of the discharge gas filled in the panel is one of the important factors in order to stabilize the discharge characteristics and suppress the change in characteristics over time. Therefore, in the discharge gas sealing process of the PDP, a method is adopted in which the inside of the panel is heated while being evacuated and the discharge gas is sealed after removing the impurity gas in the panel.

However, in the above discharge gas sealing method, the discharge gas is introduced through the vent hole for exhausting the inside of the panel and the ventilation path called the tip tube, so that the impurity gas exhausted from the panel is adsorbed on the inner wall of the vacuum exhaust system. When the discharge gas is introduced, it may enter the panel again with the discharge gas. As a result, there is a problem that a part of the display area (screen) close to the vent hole is locally contaminated by the impurity gas, thereby causing a display defect (display unevenness).

As a means for suppressing the intrusion of impurity gas into the display region, in Patent Document 1, a protective wall for bypassing the exhaust and gas filling path (flow path) is provided in the vicinity of the vent hole filled with the discharge gas. Yes. Accordingly, since the impurity gas can be prevented from directly entering the display area from the vent hole, the entry into the display area can be suppressed to some extent while detouring.

However, in this case, by providing a protective wall, the exhaust conductance inside the panel increases, so the exhaust resistance during vacuum exhaust increases. Moreover, since it is necessary to add the process for forming a protective wall, there exists a problem that manufacturing efficiency falls.

In Patent Document 2, a getter material (adsorbent) is disposed in a vacuum exhaust pipe (chip pipe) connected to the panel and activated to remove impurity gas. However, it is very difficult to arrange the getter material in a thin tip tube with high positional accuracy, and the manufacturing process becomes complicated. Further, depending on the arrangement position of the getter material or the degree of activation of the getter material, a sufficient adsorption effect may not be exhibited.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique capable of preventing or suppressing the intrusion of an impurity gas into a display region while suppressing a decrease in manufacturing efficiency of a PDP. There is to do.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.

That is, the PDP according to one embodiment of the present invention includes a first substrate structure and a second substrate structure that are opposed to each other via a discharge space, and the first substrate structure and the second substrate structure that are opposed to each other. Barrier ribs arranged to divide the discharge space into a plurality of cells on the surface side, and arranged to surround an outer side of the barrier rib forming region where the barrier ribs are arranged, and the first substrate structure and the second substrate structure A frame-like seal member that seals a space between the bodies, and a vent hole that is disposed between the partition forming region and the seal member and has an outer end sealed. Further, the plurality of cells partitioned by the partition walls have a display area that is a display area that is planned to be displayed by lighting / non-lighting, and a non-display area that is arranged so as to surround the outer periphery of the display area. Here, an outer edge of the partition formation region is located in the non-display region, and a plurality of cells partitioned by the partition are formed in a first cell disposed in the display region. A phosphor, a second phosphor formed in a second cell disposed so as to surround an outer edge of the display region, and a third phosphor disposed between the second cell and the vent hole The third phosphors formed in the cell are respectively formed.

Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

That is, it is possible to prevent or suppress the intrusion of the impurity gas into the display area while suppressing a decrease in the manufacturing efficiency of the PDP.

It is a principal part expansion assembly perspective view which shows the structural example of PDP which is one embodiment of this invention. It is a top view which shows the outline | summary of the whole structure of PDP shown in FIG. It is a top view which shows the inner surface side of the back substrate structure shown in FIG. It is a principal part enlarged plan view which expands and shows the A area | region shown in FIG. It is a principal part enlarged plan view which expands and shows the B area | region shown in FIG. It is a principal part enlarged plan view which expands and shows a part (periphery of a vent hole) of the back substrate structure of PDP which is the 1st modification of this invention. It is a principal part enlarged plan view which expands and shows a part (periphery of a vent hole) of the back substrate structure of PDP which is the 2nd modification of this invention. It is a principal part enlarged plan view which expands and shows a part (periphery of a vent hole) of the back substrate structure of PDP which is the 3rd modification of this invention.

Before explaining the present invention in detail, the meaning of terms in the present application will be described as follows.

A PDP is a substantially flat surface in which a gas discharge is generated in a discharge cell formed between a pair of substrates arranged opposite to each other, and a phosphor is excited by excitation light generated at this time to form a desired image. It is a face plate-like display panel. There are various examples of the internal structure and constituent materials of the PDP depending on the required performance or the drive system, but all of these examples are included except for the configuration that is not clearly applicable in principle.

A plasma display module (PDP module) is arranged on the PDP, a chassis that is disposed on the opposite side of the display surface of the PDP and supports the PDP, and a rear surface of the chassis (a surface located on the opposite side of the surface facing the PDP). A module comprising a circuit board on which various electric circuits for driving and controlling the PDP or supplying power to the PDP are formed, wherein the various electric circuits and the PDP are electrically connected. It is. In addition, as an embodiment of the PDP module, there is a structure in which a part or all of the circuit board on which the above various electric circuits are formed is not attached, and a mounting jig is formed at a position where the circuit board is to be attached. . In the present application, such an embodiment is also included in the PDP module.

A plasma display set (PDP set) is a display device in which a PDP module is covered with an external housing. In addition, a display device in which the PDP module is fixed to a support structure such as a stand is also included. When the PDP set is used as a television receiver, the PDP module and the tuner are electrically connected. The PDP set includes this tuner.

The plasma display device (PDP device) includes the above-described PDP, PDP module, and PDP set.

In the following embodiments, components having the same function are denoted by the same reference symbols throughout the drawings for describing the present embodiment, and repetitive description thereof will be omitted in principle. Further, in all the drawings for explaining the present embodiment, hatching or a pattern may be given even in a plan view or a perspective view for easy understanding of the configuration of each member. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
<Basic structure of PDP>
First, an example of the structure of the PDP according to the present embodiment will be described using an AC surface discharge type PDP as an example with reference to FIGS. FIG. 1 is an enlarged perspective view of the main part of the PDP according to the present embodiment, showing an enlarged main part (display area), and FIG. 2 is a plan view illustrating the overall structure of the PDP shown in FIG.

1 and 2, the PDP 1 has a front substrate structure (first substrate structure) 11 and a back substrate structure (second substrate structure) 12. The front substrate structure 11 and the back substrate structure 12 are overlapped with each other so as to face each other, and have a discharge space 24 therebetween. That is, the front substrate structure 11 and the back substrate structure 12 are disposed to face each other with the discharge space 24 interposed therebetween.

The front substrate structure 11 has a display surface of the PDP 1 and has a front substrate (first substrate) 13 mainly made of glass. A plurality of X electrodes (sustain electrodes) 14 and Y electrodes (scanning electrodes) 15 which are display electrodes of the PDP 1 are formed on the inner surface side of the front substrate 13.

The X electrode 14 and the Y electrode 15 constitute a pair of display electrodes for performing a sustain discharge (display discharge, sustain discharge), and are alternately arranged so as to extend in a strip shape along the row direction DX, for example. ing. The pair of display electrodes (X electrode 14 and Y electrode 15) constitutes a display line in the row direction DX in the PDP 1. In FIG. 1, the arrangement example of the three X electrodes 14 and the two Y electrodes 15 is shown in an enlarged manner. However, the PDP 1 includes a plurality of X electrodes 14 and Y electrodes 15 according to the number of display lines. Have.

The X electrode 14 and the Y electrode 15 are, for example, an X transparent electrode 14a and a Y transparent electrode 15a made of a transparent electrode material such as ITO (Indium Tin Oxide), for example, Ag, Au, Al, Cu, Cr, for example. Or an X bus electrode (metal electrode portion) 14b and a Y bus electrode (metal electrode portion) 15b made of such a laminated body (for example, a Cr / Cu / Cr laminated body).

FIG. 1 shows the X transparent electrode 14a and the Y transparent electrode 15a extending in a strip shape, but the electrode structure of the X transparent electrode 14a and the Y transparent electrode 15a is not limited to this. For example, in order to stabilize the sustain discharge and improve the discharge efficiency, the X bus electrodes 14b, Y are set so that the shortest distance between the pair of electrodes (referred to as a discharge gap) locally approaches the position of the cell 25. A projecting portion may be formed in a direction facing each other from a position overlapping the bus electrode 15b.

These electrode groups (X electrode 14 and Y electrode 15) are covered with a dielectric layer 17. In the display region 30 of the PDP 1, the X electrode 14 and the Y electrode 15 are covered with the dielectric layer 17 over the entire surface, and end portions are exposed from the dielectric layer 17. The ends of the X electrode 14 and the Y electrode 15 are electrically connected to an external connection terminal for electrically connecting each electrode to an external electric circuit (for example, a sustain circuit or a scan circuit). A more detailed structure of the dielectric layer 17 will be described later.

A protective film 18 is formed on the inner surface side of the dielectric layer 17 (that is, the back substrate structure 12 side). The protective film 18 is formed so as to cover the inner surface of the dielectric layer 17. The protective film 18 has a function of protecting the dielectric layer 17 from sputtering of charged particles such as ions or electrons, and a function of emitting secondary electrons from the surface by the collision of the primary charged particles. An example of the material having such a function is MgO.

On the other hand, the back substrate structure 12 has a back substrate (second substrate) 19 mainly made of glass. A plurality of address electrodes 20 are formed on the surface (inner surface) of the back substrate 19 facing the front substrate structure 11. Each address electrode 20 is formed so as to extend along a column direction DY intersecting (substantially orthogonal to) the direction in which the X electrode 14 and the Y electrode 15 extend. The address electrodes 20 are arranged with a predetermined arrangement interval so as to be substantially parallel to each other.

As a material constituting the address electrode 20, for example, Ag, Au, Al (aluminum), Cu, Cr, or a laminate thereof (for example, a laminate of Cr / Cu / Cr) can be used.

The address electrode 20 and the Y electrode 15 formed on the front substrate structure 11 constitute an electrode pair for performing address discharge, which is discharge for selecting lighting / non-lighting of the cell 25. That is, the Y electrode 15 has both a function as a sustain discharge electrode and a function as an address discharge electrode (scanning electrode).

The address electrode 20 is covered with a dielectric layer 21 mainly composed of a glass material. Similarly to the X electrode 14 and the Y electrode described above, the address electrode 20 is also covered with a dielectric layer 21 over the entire display area 30 of the PDP 1. Further, the end portion of the address electrode 20 is also exposed from the dielectric layer 21 and is electrically connected to an external connection terminal for electrical connection with an external electric circuit (for example, an address driving circuit).

A plurality of partition walls 22 extending in the thickness direction of the back substrate structure 12 are formed on the dielectric layer 21. The barrier ribs 22 include, for example, first barrier ribs 22a formed along the column direction DY in which the address electrodes 20 extend, and second barrier ribs 22b formed along the row direction DX intersecting with the address electrodes 20. The The front substrate structure 11 and the rear substrate structure 12 are fixed in a state where the surface on which the protective film 18 is formed and the surface on which the partition wall 22 is formed face each other. The position on the plane of the first barrier rib 22 a is disposed between the adjacent address electrodes 20. On the other hand, the second partition 22b is disposed between adjacent display electrode pairs (a pair of the X electrode 14 and the Y electrode 15). The inner surface side of the back substrate 19 is partitioned into a plurality of discharge spaces 24 by the barrier ribs 22. As shown in FIG. 1, the arrangement structure of the barrier ribs 22 that divide the discharge space into boxes for each cell 25 is called a box rib structure.

Phosphors that generate red (R), green (G), and blue (B) visible light on the upper surface of the dielectric layer 21 on the address electrodes 20 and the side surfaces of the barrier ribs 22 when excited by vacuum ultraviolet rays. 23r, 23g, and 23b are formed at predetermined positions, respectively.

Further, each discharge space 24 is filled with a gas such as a rare gas called a discharge gas at a predetermined pressure. As the discharge gas, for example, a mixed gas such as Xe—Ne in which the partial pressure ratio of Xe is adjusted to several percent to several tens percent can be used.

As shown in FIG. 2, along the outer periphery of the region where the front substrate structure 11 and the rear substrate structure 12 overlap, a discharge space 24 (FIG. 2) is formed by a sealing material 26 such as a low melting point glass frit. 1) is sealed. The discharge gas is enclosed in the internal space of the PDP 1.

In the PDP 1, one cell 25 is configured corresponding to the intersection of the pair of X electrode 14, Y electrode 15, and address electrode 20. That is, the cell 25 is formed at each intersection of the display electrode pair (a pair of the X electrode 14 and the Y electrode 15) and the address electrode 20. The plane area of the cell 25 is defined by the arrangement interval of the pair of X electrodes 14 and Y electrodes 15 and the arrangement interval of the partition walls 22. Each cell 25 is formed with one of a red phosphor 23r, a green phosphor 23g, and a blue phosphor 23b.

A pixel is formed by the set of the R, G, and B cells 25. That is, each of the

phosphors

23r, 23g, and 23b is a light-emitting element that constitutes a sub-pixel of the PDP 1, and is excited by vacuum ultraviolet rays having a predetermined wavelength generated by the sustain discharge, so that red (R), green (G), and blue ( B) Visible light of each color is emitted.

In FIG. 1, a box rib structure is shown as an arrangement structure of the partition walls 22, but the arrangement structure of the partition walls is not limited to this. For example, the first partition wall 22a extending along the column direction DY may be extended in a strip shape and the second partition wall 22b may not be formed. Such an arrangement structure of the partition walls 22 is called a stripe rib structure. 1 shows an example in which the address electrode 20 is formed on the back substrate structure 12, the address electrode 20 can also be formed on the front substrate structure 11.

<Detailed structure of back substrate structure>
Next, the detailed structure of the back substrate structure shown in FIGS. 1 and 2 will be described with reference to FIGS. 3 is a plan view showing the inner surface side of the back substrate structure shown in FIG. 2, FIG. 4 is an enlarged plan view of the main part showing the area A shown in FIG. 3, and FIG. It is a principal part enlarged plan view shown.

In the present embodiment, each area on the display plane of the PDP, such as a display area and a non-display area, is described with a name, but the definition of each term is as follows.

That is, in the PDP, a voltage is applied to the display electrode group and discharge (sustain discharge) is generated to display, but light emission by the discharge (or light emission from the phosphor excited by the discharge) is performed. A region, that is, a region to be displayed by lighting / non-lighting in a cell (display cell) is referred to as a display region. A region that is outside the display region and is not displayed (or a region that can be displayed but is not used) is referred to as a non-display region. The non-display area is limited to a sealing material arrangement area (seal area) for sealing along the outer periphery of the area where the front substrate structure and the back substrate structure overlap. The partition formed in the non-display area is referred to as a dummy rib.

As described above, the partition wall 22 is formed on the inner surface side of the back substrate structure 12 with a box rib structure as shown in FIG. The partition wall 22 is also formed in a part of the non-display area 31 positioned around the display area 30 as shown in FIG. That is, the outer edge of the partition wall formation region 33 is located in the non-display region 31.

The reason why the partition wall 22 is formed in the non-display area 31 in this way is as follows. First, the first reason is to stabilize the shape of the partition wall 22 formed in the display region 30. The partition wall 22 can be formed by, for example, a sand blast method or an etching method. In these partition wall forming methods, the glass material to be the partition wall 22 is formed in a substantially flat layer shape, and unnecessary portions are removed. In these methods, for example, in the region where the partition walls 22 are regularly formed as shown in FIG. 1, it can be formed with high molding accuracy. However, at the outer edge of the region where the partition wall 22 is formed, the portion required as the partition wall 22 is easily scraped off excessively, so that the shape of the partition wall 22 is not stable. Therefore, by forming the partition wall 22 up to the non-display area 31 that does not contribute to display, the outer edge of the area where the partition wall 22 is formed is accommodated in the non-display area 31. Thereby, in the display area 30, since the partition 22 is regularly formed in the whole range, the shape of the partition 22 can be stabilized.

The second reason is to form a phosphor outside the display area 30. In the present embodiment, as shown in FIGS. 4 and 5,

phosphors

34 and 35 are also formed outside the display region 30 (the reason will be described later). From the viewpoint of forming the

phosphors

34 and 35 with high positional accuracy, it is effective to form the barrier ribs 22 and form the

phosphors

34 and 35 in a region (cell) partitioned by the barrier ribs 22. Therefore, in the present embodiment, the partition wall 22 is formed up to the non-display area 31 around the display area 30.

Further, as shown in FIG. 4,

phosphors

23, 34, and 35 are formed in each cell partitioned by the barrier ribs 22. First, as shown in FIG. 1, a phosphor (first phosphor) 23 is formed in a cell (first cell, display cell) 25 arranged in the display region 30. The phosphor 23 is a phosphor for forming a display image by emitting light by being excited by vacuum ultraviolet rays generated by discharge.

Next, a phosphor (second phosphor) 34 is formed in a cell (second cell) 36 disposed so as to surround the cell 25 disposed on the outermost periphery of the display area. The material and shape of the phosphor 34 are the same as those of the phosphor 23 shown in FIG. 1, but are formed for the following reason. That is, the

phosphors

23 and 34 are formed by, for example, applying the phosphor material on the paste to the

cells

25 and 36 by a screen printing method or the like and then firing the phosphor material.

In this screen printing method, a plate called a screen mesh in which a large number of holes are formed is arranged on the partition wall 22 corresponding to the position where the phosphor material is applied, and the paste-like phosphor material is placed on the screen mesh. Deploy. After that, when the screen mesh is rubbed together with the paste-like phosphor material (referred to as squeezing) from the upper surface side of the screen mesh with a rubbing jig called a squeegee, the phosphor material is removed from the holes formed in the screen mesh. Extruded and a phosphor material can be applied to a given cell.

Here, squeegeeing is performed by moving the squeegee in a certain direction along the upper surface of the screen mesh. However, the resistance due to the phosphor material increases at the end of the area where the holes of the screen mesh are formed. The mesh position is easy to shift. Therefore, if the area where the phosphor is applied is only the cell 25 in the display area 30, there may be a case where the application failure due to the displacement of the screen mesh occurs in the cell 25 arranged on the outermost periphery of the display area. .

Therefore, in the present embodiment, the phosphor 34 is formed in the cell 36 arranged in the non-display area 31. Thereby, the application | coating defect of the fluorescent material in the display area 30 can be prevented. From this point of view, it is preferable to form the same pattern as the arrangement pattern of the phosphors 23 formed in the display region 30. Since the phosphor 34 is formed for the above-described reason, the cell 36 in which the phosphor 34 is formed is disposed adjacent to the cell 25 disposed on the outermost periphery of the display region 30. In other words, among the phosphors 34, the phosphor 34 formed on the innermost side is formed in the cell 36 adjacent to the cell 25.

However, the

phosphors

23 and 34 are materials having very high adsorptivity, and may adsorb impurities such as moisture and carbon dioxide during the manufacturing process. For example, in the process of forming the

phosphors

23 and 34, or the process of curing and sealing the sealing material 26, an organic component contained in the pasty raw material is generated as an impurity gas. Therefore, if too many phosphors 34 are formed, the amount of impurity gas adsorbed by the phosphors 34 in the step of forming the phosphors 34 or the step of curing and sealing the sealing material 26 increases. As a result, a new problem arises that more impurity gas needs to be discharged.

Therefore, the phosphor 34 is the minimum necessary from the viewpoint of preventing the screen mesh from being displaced (in this embodiment, as shown in FIG. 5, one row (1 for each phosphor of red, green, and blue) It is preferable to form each line).

Next, as shown in FIG. 4, a phosphor (third phosphor) 35 is formed in a cell (third cell) 38 disposed between the cell 36 and the air hole 37. On the other hand, as shown in FIG. 5, the phosphor 35 is not formed in other regions (regions other than between the cell 36 and the vent hole 37 (see FIG. 4)). That is, the phosphor 35 is formed only between the cell 36 and the air hole 37. In other words, the phosphor is formed in the peripheral region of the vent hole 37 with a wider width than other regions. This is due to the following reason.

In the process of assembling the front substrate structure 11 and the rear substrate structure 12 shown in FIG. 3 in the manufacturing process of the PDP 1, the gas in the discharge space is exhausted in order to improve the purity of the discharge gas focused on the discharge space. While assembling. In addition, after the periphery of the partition wall formation region 33 is sealed by the sealing material 26, the vent hole 37 becomes a ventilation path of the inner space of the PDP 1 including the discharge space, and the remaining of the inner space is passed through the vent hole 37. Exhaust gas and fill with discharge gas. The PDP vent hole 37 is open for use as a vent path during the manufacturing process of the PDP 1. However, after the discharge gas is completely sealed, the outer end is sealed and the inner space of the PDP 1 is sealed. Is sealed.

Here, when the residual gas exhaust path and the discharge gas sealing path are shared, a part of the impurity gas contained in the exhausted residual gas is adsorbed on the inner wall of the exhaust system, and together with the discharge gas when the discharge gas is introduced. It may enter the internal space of the PDP 1 again. When this impurity gas enters the cell 25 (see FIG. 4) in the display region 30, the cell 25 is locally contaminated, thereby causing a display defect (display unevenness). Since the impurity gas introduced together with the discharge gas is introduced through the vent 37, the cell 25 in the display region 30 near the vent 37 is easily contaminated.

Therefore, in the present embodiment, the phosphor 35 is formed in the area around the air hole 37, that is, in the cell 38 arranged in the area between the cell 36 and the air hole 37. The material and the shape constituting the phosphor 35 are the same as those of the phosphor 23 or the phosphor 34. As described above, the phosphor 35 has a characteristic that the phosphor 35 can easily adsorb an impurity gas such as moisture or carbon dioxide. Yes.

Therefore, since the impurity gas introduced into the internal space of the PDP 1 via the vent hole 37 is adsorbed by the phosphor 35, the impurity gas can be prevented from entering the cell 25 in the display region 30. That is, the phosphor 35 is used as an adsorbent (getter material) that adsorbs the impurity gas introduced from the vent hole 37.

Since the phosphor 34 and the phosphor 35 are made of the same material, the impurity gas can also be adsorbed by the phosphor 34. For example, a case is assumed in which the impurity gas travels through the internal space of the PDP 1 through a route that extends around the partition wall formation region 33 from the air hole 37 along the sealing material 26, though the amount is small. In this case, the impurity gas is adsorbed by the phosphor 34. However, by forming the phosphor 35 in the peripheral region of the vent hole 37, the phosphor 35 is adsorbed to most of the introduced impurity gas. That is, the phosphor 35 is formed between the vent hole 37 which is an intrusion source of the impurity gas and the display region 30, so that most of the gas introduced from the vent hole 37 into the internal space of the PDP 1 is the phosphor 35. Since the phosphor 35 functions as a filter, the impurity gas can be adsorbed most efficiently.

Further, in the case where the phosphor 35 is not formed but only the phosphor 34 is adsorbed, it is necessary to form the phosphor 34 wider than that shown in FIG. In this case, since the amount of the impurity gas adsorbed by the phosphor 34 is increased in the step of forming the phosphor 34 as described above, or in the step of curing and sealing the sealing material, a larger amount of impurity gas is generated. A new problem arises that needs to be discharged. In a region far from the air hole 37, the exhaust inductance becomes high, so it is not easy to exhaust a large amount of impurity gas adsorbed by the phosphor 34.

On the other hand, the phosphor 35 is formed in the vicinity of the vent hole 37. For this reason, in the process of forming the phosphor 35, even if the phosphor 35 adsorbs the impurity gas, it can be easily exhausted in the exhaust process.

That is, in this embodiment, the impurity gas generated from the phosphor 35 in the exhaust process can be easily exhausted, and the impurity gas introduced in the discharge gas introduction process can be adsorbed most efficiently. The phosphor 35 is selectively formed in the peripheral region of the vent hole 37, which is a region that can be formed. Thereby, it is possible to prevent or suppress the intrusion of the impurity gas into the display region 30 while suppressing a decrease in the manufacturing efficiency of the PDP 1.

Further, in the step of introducing the discharge gas, even if there is an impurity gas that does not pass through the region where the phosphor 35 is formed, for example, enters the region shown in FIG. 5, the amount is small. It can be adsorbed by the phosphor 34. As a result, the impurity gas can be prevented or suppressed from entering the display region 30.

In addition, according to the present embodiment, as described in Japanese Patent No. 3564783 (Patent Document 1), since it is not necessary to form a barrier, it is possible to suppress a decrease in exhaust efficiency in the exhaust process. .

Further, in the present embodiment, the cell 38 is formed by a structure partitioned by the partition wall 22 like the

cells

25 and 36, and the phosphor 35 formed in the cell 38 is formed in the display region 30. It is formed of the same material and structure as the phosphor 23 or the phosphor 34. For this reason, the process of forming the

cells

25, 36, and 38 and the process of forming the

phosphors

23, 34, and 35 can be performed collectively. Therefore, since it is not necessary to add a new process, the fall of manufacturing efficiency can be suppressed.

In this embodiment, the phosphor 35 functioning as an adsorbent is formed in the cell 38 partitioned by the partition walls 22. Therefore, since the position where the phosphor 35 is formed can be easily defined, the phosphor 35 can be formed with high positional accuracy.

Next, the position and range where the phosphor 35 is formed will be described. In FIG. 4, the air holes 37 are formed at the corners of the back substrate structure 12. A sealing material 26 is formed on the two outer sides of the air hole 37. Here, the phosphor 35 is formed so as to surround a region inside the air hole 37 in the plane of the back substrate structure 12. Thereby, in the step of introducing the discharge gas, most of the introduced gas can be passed through the region where the phosphor 35 is formed, so that the impurity gas can be adsorbed efficiently.

Further, the phosphor 35 is formed away from the vent hole 37. The partition wall 22 formed outside the display area 30 (non-display area 31) is also formed away from the air holes 37. If the distance between the partition wall 22 and the vent hole 37 is too close, the intake / exhaust resistance is increased in the exhaust process or the process of introducing the discharge gas, so that the intake / exhaust efficiency is lowered. However, this can be suppressed by forming the partition wall 22 away from the vent hole 37. For the same reason, the partition wall 22 formed outside the display area 30 (non-display area 31) is also formed away from the sealing material 26.

Further, in FIG. 4, the phosphor 35 is not formed at the end of the partition wall 22. In other words, a blank cell (fourth cell) 39 in which the phosphor 35 is not formed is disposed outside the cell 38 in which the phosphor 35 is formed. The phosphor 35 may be formed up to the end of the partition 22 as shown in FIG. 6 which is a first modification of the present embodiment. FIG. 6 is an enlarged plan view of a main part showing a part of the back substrate structure of the PDP (periphery of the vent hole) as a first modification to the present embodiment. However, as described above, it is difficult to stabilize the shape of the partition wall 22 formed on the outer edge portion. For this reason, when the phosphor 35 is formed in the cell 39 partitioned by the partition 22 having an unstable shape, the formation position accuracy of the phosphor 35 may be lowered. Therefore, as shown in FIG. 4, it is preferable not to form the phosphor 35 in the cell 39 partitioned by the partition wall 22 formed at the outer edge.

Further, with respect to the range in which the phosphor 35 is formed, it is preferable that the phosphor 35 is formed in at least a plurality of columns (plural rows) of cells 38 from the viewpoint of improving the adsorption reliability of the impurity gas. However, if the range in which the phosphor 35 is formed is excessively expanded, as described above, the impurity gas that needs to be exhausted increases in the exhaust process. From this viewpoint, the range in which the phosphor 35 is formed is preferably at least 3 columns (3 rows) and several tens columns (several tens rows).

In FIG. 4, a blank cell 39 that does not form a phosphor is disposed between the cell 36 and the cell 38. In the case where the non-display area 31 is wide and a large number of cells (dummy cells) can be formed in the non-display area 31, the cell is formed from the viewpoint of keeping the area for forming the phosphor 35 to the minimum necessary. A method of arranging a blank cell 39 between the cell 36 and the cell 38 is effective. This is because the cell 38 in which the phosphor 35 is formed can be disposed close to the air hole 37 side, so that the impurity gas adsorption efficiency is improved.

On the other hand, as in the second modification shown in FIG. 7, the cell 36 and the cell 38 can be arranged adjacent to each other without using the blank cell 39. FIG. 7 is an enlarged plan view of an essential part showing a part of the back substrate structure of the PDP (periphery of the vent hole) as a second modification to the present embodiment. In this case, since the phosphor material can be regularly applied in the step of applying the phosphor material, application failure such as erroneous application to the adjacent cells or the partition 22 can be suppressed.

Further, in FIG. 4, red, green and blue phosphor materials are all used as the phosphor 35. That is, the

phosphors

23, 34, and 35 are formed using the same three types of materials that emit red, green, and blue light, respectively. However, since the phosphor 35 is used as an adsorbent, the emission color is not particularly limited. For example, as in the third modification shown in FIG. 8, a phosphor material that emits an arbitrary color of red, green, and blue is selected as a material used for the phosphor 35, and the phosphor 35 is arbitrarily selected. One color may be used. FIG. 8 is an enlarged plan view of a main part showing a part of the back substrate structure of the PDP (periphery of the vent hole) as a third modification to the present embodiment.

For example, when the step of applying the phosphor material of the phosphor 35 is performed by screen printing, the screen mesh is changed for each emission color of the phosphor material. Here, as shown in FIG. 8, if the phosphor 35 has one color, it is only necessary to apply processing to form the phosphor 35 on one of the three types of screen mesh. Can be processed.

As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment of the invention, and various modifications can be made without departing from the scope of the invention. is there.

For example, in the present embodiment, an example in which the vent hole 37 is formed at one corner at the corner of the back substrate structure 12 has been described. However, the members, positions, and numbers forming the air holes 37 are not limited to this. For example, the air hole 37 can be formed in the front substrate structure 11 as long as it is outside the partition wall formation region 33 shown in FIG. 3 and inside the sealing material 26. Also, a plurality of vent holes 37 can be formed.

In the present embodiment, the PDP has been described as an example of the PDP device. However, for example, a chassis and a circuit board can be attached to the PDP 1 shown in FIG. 2 and applied as a PDP module or a PDP set. .

The present invention can be applied to plasma display devices such as PDPs, PDP modules, and PDP sets.

Claims

A first substrate structure and a second substrate structure which are arranged to face each other via a discharge space;
A barrier rib arranged to divide the discharge space into a plurality of cells on opposite sides of the first substrate structure and the second substrate structure;
A frame-shaped sealing member that is disposed so as to surround an outer side of the partition wall forming region where the partition wall is disposed, and seals a space between the first substrate structure and the second substrate structure;
A vent hole disposed between the partition forming region and the seal member, the outer end of which is sealed;
In a plurality of cells partitioned by the partition walls, a display area that is a scheduled area for performing display by lighting / non-lighting,
A non-display area arranged so as to surround the outer periphery of the display area,
An outer edge of the partition forming region is located in the non-display region,
The plurality of cells defined by the partition walls include a first phosphor formed in the first cell arranged in the display area, and a second cell arranged so as to surround the outer edge of the display area. The second phosphor to be formed and the third phosphor formed in the third cell arranged between the second cell and the vent hole are respectively formed. A plasma display device.
The plasma display device according to claim 1,
The plasma display apparatus, wherein the third phosphor is formed only between the second cell and the vent hole.
The plasma display device according to claim 2, wherein
The plasma display apparatus, wherein the second cell in which the second phosphor is formed is arranged adjacent to the first cell arranged on the outermost periphery of the display region.
The plasma display device according to claim 3, wherein
The plasma display apparatus, wherein the first, second, and third phosphors are formed using the same three types of materials that emit red, green, and blue light, respectively.
The plasma display device according to claim 3, wherein
The plasma display apparatus, wherein the third phosphor is formed so as to surround a region inside the vent hole.
The plasma display device according to claim 1,
A plasma display device, wherein a blank fourth cell in which the phosphor is not formed is disposed outside the third cell in which the third phosphor is formed.
The plasma display device according to claim 1,
The plasma display apparatus, wherein the third phosphor is formed in a plurality of rows of the third cells.
The plasma display device according to claim 1,
4. A plasma display device, wherein a blank fourth cell not forming the phosphor is disposed between the second cell and the third cell.
The plasma display device according to claim 1,
The plasma display apparatus, wherein the second cell and the third cell are arranged adjacent to each other.
The plasma display device according to claim 1,
The third phosphor is formed using a material that emits any one of the three types of materials that emit red, green, and blue light used for the first and second phosphors. A plasma display device characterized by comprising: