WO2010010619A1

WO2010010619A1 - Plasma display panel and manufacturing method thereof

Info

Publication number: WO2010010619A1
Application number: PCT/JP2008/063243
Authority: WO
Inventors: 隆史吉永; 昌之和田; 正軌黒木; 佐々木　孝
Original assignee: 株式会社日立製作所
Priority date: 2008-07-24
Filing date: 2008-07-24
Publication date: 2010-01-28

Abstract

The invention relates to the structure of a ventilation and exhaust section of PDP or the like, which copes with reduction of panel thickness, can ensure ventilation and exhaust efficiency by ensuring the diameter of a tube provided in a direction parallel to a panel plane or the like. The PDP of the invention, for example, has a front three-electrode construction and a protruding section (43) of a first substrate structure (11) at the outer peripheral part thereof. Provided in a part of the outer peripheral part of the first substrate structure (11), for example, is a first ventilation and exhaust groove (51A) that communicates an internal space of panel with an outer space in a first direction (DY) parallel to the panel plane. A ventilation and exhaust tube (52) extending in the first direction is connected to an end part communicating with the outside of the first ventilation and exhaust groove (51A). The ventilation and exhaust tube (52) has one opening end partially cut off.

Description

Plasma display panel and manufacturing method thereof

The present invention relates to a technology of a gas discharge panel using gas discharge, such as a plasma display panel (PDP), and more particularly to a structure of a ventilation part used for ventilation inside and outside the panel.

In a conventional general AC drive / surface discharge type PDP (hereinafter also simply referred to as a panel), a structure of an exhaust / exhaust part such as a chip tube is provided for processing steps such as exhausting the inside space of the panel and filling discharge gas. It has been. Conventionally, the tip tube is provided in the panel thickness direction (direction perpendicular to the panel plane) (FIG. 15).

Japanese Patent Laid-Open No. 6-251748 (Patent Document 1) describes a structure in which an exhaust pipe is provided on a panel side surface (direction parallel to the panel plane). In the case of this technique, the tube is attached in a gap between the front and rear substrates constituting the panel.
JP-A-6-251748

In the conventional technology of providing a ventilation portion such as a chip tube in the panel thickness direction in the PDP, it is necessary to secure the length of the tube to some extent for sealing, sealing off, etc. Thickness (thickness including the ventilating part) increases. Conventionally, it is difficult to shorten the tube so that the end of the tube is at the same level as the panel plane.

Therefore, as in Patent Document 1, a structure in which a ventilation portion such as a pipe is provided in a direction parallel to the panel plane is conceivable. If this structure is realized, it is possible to contribute to the overall thinning of the PDP by preventing the tube from protruding from the panel plane in the panel thickness direction.

However, in the conventional PDP, the distance between the front and rear substrates (glass substrates) is as small as, for example, about 200 μm. Therefore, when the tube structure as described above (structure in which the tube is sandwiched between the substrates) is provided, the diameter of the tube, etc. There are big restrictions. As a result, there are problems such as poor ventilation efficiency.

In recent years, thinning of the PDP has been demanded. With this, a simple system such as a structure in which a tube is sandwiched between the substrates is provided for a structure in which a ventilation portion such as a tube is provided in a direction parallel to the panel plane. Realization becomes difficult.

Further, in the conventional PDP, a structure in which the sealing material is sandwiched between the front and rear substrates on the outer periphery of the panel is generally used (FIG. 15). Actions such as deformation of the sealing material and physical stability of the tube are problematic.

The present invention has been made in view of the above problems, and its main object relates to the structure of the ventilating part such as a PDP, and in a direction parallel to the panel plane in response to the thinning of the panel. It is to provide a technique capable of ensuring the exhaust efficiency by sufficiently securing the diameter of a pipe (exhaust pipe) provided in the pipe.

Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows. In order to achieve the above object, a typical embodiment of the present invention is a technique such as a PDP and a manufacturing method thereof, and is characterized by the following configuration.

In the PDP and the manufacturing method of this embodiment, a groove (exhaust groove) that communicates between the inside and outside of the panel in a direction parallel to the panel plane is provided in at least one of the front and rear substrates (substrate structure), for example, the front substrate structure. A structure in which a partially cut-out pipe (exhaust pipe) is connected to the exhaust groove on the outside of the sealing part on the outer periphery of the panel (overhang part) so as to cover the exposed part of the exhaust groove And Thereby, the magnitude | size of the diameter of the exhaust_gas | exhaustion part (exhaust / exhaust pipe) in the direction parallel to a panel plane is ensured.

Especially, the structure of the ventilating part is applied to a PDP having a front three-electrode structure. In a PDP having a front three-electrode structure, a groove including a partition wall structure or the like is formed by cutting the substrate surface in the substrate structure on the back side, and the front and rear substrate structures are in contact with each other on the outer periphery. is there.

This PDP has, for example, a first substrate structure on the front side on which electrodes (for example, three electrodes) are formed, and a second second structure on the back side in which a groove including a partition structure is formed and a phosphor is formed between the partitions. A substrate structure, the first substrate structure has a larger planar area than the second substrate structure, and has an overhang portion formed by the first substrate structure on an outer peripheral portion of the panel, In a part of the outer peripheral portion of the first substrate structure, a first communication that communicates between the internal space by the groove of the panel and the outside in a first direction (DX, DY direction) parallel to the panel plane. An exhaust groove is provided, and an exhaust pipe extending in the first direction is connected to an end portion that leads to the outside of the first exhaust groove, and one end portion of the exhaust pipe is partially open It has a cut shape, and the cut portion is connected so as to cover the end portion of the first exhaust groove. .

Further, in the PDP, planes are in contact with each other at the outer peripheral portions of the first and second substrate structures, and a chamfered portion is provided at an end portion on the front surface side of the outer peripheral portion of the second substrate structure. The first sealing material for sealing the outer peripheral portions of the first and second substrate structures is provided in the space formed by the chamfered portions, and the outer peripheral portions of the first and second substrate structures are provided. The chamfered portion is not provided in the portion where the exhaust groove is provided, and the second sealing material is provided at the connection boundary portion between the cut portion of the exhaust pipe and the first and second substrate structures. Provided.

Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows. According to a typical embodiment of the present invention, a pipe (exhaust pipe) provided in a direction parallel to the panel plane is associated with the structure of the ventilating part such as a PDP and corresponding to the thinning of the panel. A sufficient diameter can be secured to ensure exhaust efficiency.

It is a figure which shows schematic structure which looked at the whole PDP in one embodiment of this invention from the front side. It is a figure which shows an example of the structure of the cell of PDP of one Embodiment by a disassembled perspective view. It is a figure which shows an example of the structure of the cell of PDP of one Embodiment in (a) the plane seen from the front side, (b) The cross section of a panel thickness direction. It is a figure which shows the structural example of the back substrate structure of PDP of one Embodiment by a perspective view. It is a figure which shows the structural example regarding the superimposition and sealing of the board | substrate structure before and behind PDP of one Embodiment in a cross section, (a) shows the front state, (b) shows the back state. It is a figure which shows schematic structure of the exhaust_gas | exhaustion part in PDP of Embodiment 1 of this invention, (a) shows the whole, (b) shows the structure of the vicinity of an exhaust-gas groove by a perspective view, (c) is exhaust-air exhaust. The structure which attached the pipe | tube is shown by a perspective view. It is a figure which shows the cross-sectional structure of the ventilation part in PDP of Embodiment 1, (a) shows arrangement | positioning structure of a groove | channel and a pipe | tube, (b) shows the cross-sectional structure in the central axis of a groove | channel or a pipe | tube. It is a figure which shows the structure which looked at the ventilation part in PDP of Embodiment 1 from each direction, (a) is a cross section similar to Fig.7 (a), (b) is the plane seen from the panel side surface, c) shows the plane seen from the panel back side. It is a figure which shows the structural example of the attachment and sealing of the exhaust pipe with respect to the panel outer peripheral part in PDP of Embodiment 1, (a) is arrangement | positioning of the sealing material to an outer peripheral part, (b) is the pipe | tube with respect to a groove | channel. Mounting, (c) shows the arrangement of the sealing material relative to the tube. It is a figure which shows schematic structure of the exhaust_gas | exhaustion part in PDP of Embodiment 2 of this invention, (a) shows the whole, (b) shows the structure of the vicinity of an exhaust-gas groove by a perspective view. FIG. 5 is a diagram showing a cross-sectional configuration of a ventilating part in a PDP according to a second embodiment. It is a figure which shows schematic structure of the exhaust_gas | exhaustion part in PDP of Embodiment 3 of this invention, (a) shows the whole, (b) shows the structure of the vicinity of an exhaust-gas groove | channel by a perspective view. FIG. 6 is a diagram illustrating a cross-sectional configuration of a ventilating part in a PDP according to a third embodiment. It is a figure which shows the flow of the manufacturing method of PDP in one embodiment of this invention. It is a figure which shows the cross-sectional structure of PDP of a prior art example.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted. For the sake of explanation, it has a DX direction (horizontal direction in the screen), a DY direction (vertical direction in the screen), and a DZ direction (panel thickness direction).

(Embodiment 1)
A PDP 10 according to Embodiment 1 of the present invention will be described with reference to FIGS. In the first embodiment, in the PDP 10 having a front three-electrode structure, a vent hole 51 is provided on the front substrate structure 11 side, and a partially cut vent pipe 52 is connected to the groove 51 (see FIG. 6 etc.).

<PDP>
FIG. 1 schematically shows a planar configuration of the entire PDP 10 according to the present embodiment as viewed from the display screen (front surface) side. This PDP 10 has a structure in which three types of electrodes (X, Y, A) are provided on the front side and no electrode is provided on the back side (referred to as a front three-electrode structure).

The PDP 10 includes a first structure (front substrate structure) 11 on the front side (side having a display screen) and a second structure (rear substrate structure) 12 on the back side (broken line), which are mainly made of a glass substrate. In combination). The front and rear structures (11, 12) are sealed by a sealing portion (sealing material) 42 disposed on the outer peripheral portion of the panel, and a discharge space is formed between them. The PDP 10 is further connected to a circuit unit such as a chassis or a drive circuit, thereby forming a PDP device (PDP module).

On the first structure 11 side, an X electrode 21 (represented by X) and a Y electrode 22 (represented by Y), which are display electrode pairs extending in the DX direction, and an address electrode 23 (represented by A) extending in the DY direction. Have. The X electrode 21 is an electrode for sustain driving, the Y electrode 22 is an electrode for both sustain driving and scanning driving, and the address electrode 23 is an electrode for address driving. There is no electrode on the second structure 12 side.

The display area (screen) 40 is an area in which a cell (display cell) group formed by the intersection of the electrode (X, Y, A) group is configured and an image is displayed. The outer non-display area 41 is not used for video display. A frame-shaped portion outside the non-display area 41 is a sealing portion 42. A frame-like portion outside the sealing portion 42 is an overhang portion 43 used as an electrode lead-out portion or the like. In plan view, the first structure 11 on the front side is slightly wider than the second structure 12 on the back side. This is because there is no need for an electrode lead portion on the back side. The projecting portion 43 on the front side is used as a lead-out portion (portion connected to the drive circuit side) of each electrode (X, Y, A). For example, display electrodes (X, Y) are provided on both lateral sides, and address electrodes (A) are provided on the lower side.

In a part of the outer peripheral portion of the panel, a region (ventilation unit) 50 used for a processing step such as venting inside and outside the panel is provided. This region 50 includes an exhaust / exhaust groove 51 and an exhaust / exhaust pipe 52 (described later). In this example, the region 50 is provided in the vicinity of the upper side and upper left of the panel. This region 50 can be provided at any location on the outer peripheral portion (the overhang portion 43) of the panel as long as it is an empty location without an electrode lead-out portion.

<Cell (1)>
In FIG. 2, an example of the cell structure of the PDP 10 having the front three-electrode structure is shown in an exploded perspective view. A pixel is formed by a collection of light emitting cells (Cr, Cg, Cb) of R (red), G (green), and B (blue). The cell is divided by a front side region (light emitting region) where the display electrode pair (X, Y) and the address electrode 23 (A) intersect and light emission is taken out, and a partition wall 8, and a phosphor 9 is formed and filled with a discharge gas. This is a unit associated with a rear side region (discharge region) where discharge is generated.

The first structure (front substrate structure) 11 is mainly composed of a light-transmissive flat front substrate (glass substrate) 1, and on the inner surface (discharge space side) of the front substrate 1 in the DX direction. In parallel, a plurality of display electrode (X electrode 21 (X), Y electrode 22 (Y)) pairs are formed. The X electrode 21 and the Y electrode 22 are constituted by, for example, transparent electrodes (21a, 22a) and bus electrodes (21b, 22b), respectively. The display electrode (X, Y) group on the front substrate 1 is covered with a first dielectric layer 31.

A plurality of address electrodes 23 (A) are formed on the flat first dielectric layer 31 in parallel with the DY direction intersecting the DX direction. On the first dielectric layer 31, the address electrode 23 (A) group is covered with the second dielectric layer 32. The dielectric layer 3 (31, 32) is divided into two layers for forming the display electrode (X, Y) and the address electrode 23 (A). The surface of the flat second dielectric layer 32 is further covered with a protective layer 4 (by MgO or the like). It is also possible to omit the second dielectric layer 32 and cover it with the protective layer 4.

In the second structure (back substrate structure) 12, a partition wall (rib) is mainly formed of a back substrate (glass substrate) 5, and has a groove structure formed on the inner surface (discharge space side) of the back substrate 5. 8 is configured. For example, the box-shaped partition wall 8 includes a partition wall portion (vertical rib 8A) extending in the DY direction and a partition wall portion (horizontal rib 8B) extending in the DX direction. The barrier rib 8 partitions the discharge space corresponding to the cell (discharge region).

In the region (side surface and bottom surface) between the barrier ribs 8, phosphors 9 (9 r, 9 g, 9 b) for each color (R, G, B) are provided for each display column in the DY direction so as to be exposed to the discharge space. It is formed separately.

Note that the detailed structure is not limited to the above structure, and various detailed structures are possible depending on the driving method. For example, there are a stripe-shaped partition wall 8 structure using only the vertical ribs 8A and a ladder-shaped partition wall 8 structure provided with a ventilation path in the DX direction.

<Cell (2)>
In FIG. 3, the planar structural example of the cell of this PDP10 is shown. (A) shows a cell (Cr, Cg, Cb) in a plane (DX-DY direction) viewed from the front side, and (b) shows a cross section (DX-DZ direction) of the cell corresponding to (a). The light emitting region of the cell (Cr, Cg, Cb) is a region surrounded by a member having low light transmissivity such as the bus electrode 2b, the address electrode 23, and the rib 8.

In the display electrode (X electrode 21, Y electrode 22) pair, the bus electrode 2b (21b, 22b) is a linear electrode with a low wiring resistance made of a metal such as Cr (chromium) or Cu (copper). The end portion is connected to the drive circuit side at the electrode lead-out portion. The transparent electrode 2a (21a, 22a) is made of a light-transmitting material such as ITO (Indium Tin Oxide), for example, and is connected to the bus electrode 2b (21b, 22b), for example, inside the cell (DY direction) for each cell. It has a protruding shape and forms a discharge gap in the display electrode pair.

The bus electrode 2b is arranged above the lateral rib 8B, at a position overlapping in the DZ direction or a position protruding slightly from the inside of the cell. Above the lateral rib 8B, the bus electrodes 2b of the adjacent display lines (cells) are arranged and are non-display portions. An address electrode 23 (A) is arranged linearly in the DY direction at a position on the right side of the vertical rib 8A. The address electrode 23 (A) is formed of the same material as that of the bus electrode 2b, for example.

In this example, in one cell, the address electrode 23 is arranged on the left side (next to the left vertical rib 8A), the X electrode 21 on the upper side (the end side of the upper horizontal rib 8B), and the lower side (lower side). Y electrode 22 is arranged on the edge of the horizontal rib 8B. The transparent electrode 22a of the Y electrode 22 is arranged on the right side of the address electrode 23, and the transparent electrode 21a of the X electrode 21 is arranged on the left side of the right vertical rib 8A.

The transparent electrode 2a (21a, 22a) has a portion that overlaps and is connected to the bus electrode 2b and a portion that protrudes from the portion to the inside of the cell to form a discharge gap. In this example, the protruding shape of the transparent electrode 2a is such that the tip is a triangle and the long side is oblique to the DX and DY directions. The long sides of the tips of the pair of transparent electrodes 2a (21a, 22a) face each other in parallel to form a discharge gap having a certain length, for example, and the discharge gap is positioned near the diagonal of the cell rectangle. The transparent electrode 2a can have various other shapes such as a rectangle.

By applying a voltage from the drive circuit side, an address discharge for selecting a cell to be lit is performed between the address electrode 23 (A) and the Y electrode 22 (transparent electrode 22a). In addition, between the display electrode (X, Y) pair (between the

transparent electrodes

21a and 22a), a display discharge (sustain discharge) which is a surface discharge is performed for lighting the selected cell.

<Back substrate structure>
4, a structural example of the second structure (back substrate structure) 12 is schematically shown. This is the case of the box-shaped rib 8. The original flat back substrate (glass substrate) 5 is shaved by, for example, a sandblasting method to form grooves 14 (concave portions), whereby a structure such as a partition wall 8 integrated with the back substrate 5 is formed.

A is a chamfered portion of a corner in a plane that is in contact with the plane on the first structure 11 side in the outer peripheral portion (four sides) of the back substrate 5. The chamfered shape of a is C (corner), R (circle), or the like. In this example, it is a case of chamfering of C (about 45 degrees). Of the chamfered part a, the part indicated by d is a part where the ventilating part 50 is provided, and the corners are left without being chamfered. In the outer peripheral portion of the panel (second structure 12), basically, all of the chamfered portion a is provided, and the sealing material 42 is disposed at the portion (FIG. 5).

A frame-like space indicated by b is a space associated with the non-display area 41 in the groove 14 and becomes a part of the ventilation path. The space b communicates with the exhaust / exhaust section 50 (groove 51). The space indicated by c is a space associated with the display area 40 and the cell (discharge area) in the groove 14.

The groove 14 is appropriately provided with a shape serving as a ventilation path. For example, in the case of the box-shaped rib 8, the path in the DY direction is provided by making the height of the horizontal rib 8B lower than the height of the vertical rib 8A. Or the clearance gap is provided between the planes of the 1st structure 11 by making the height of the rib 8 lower than the height of an outer peripheral part.

<Sealing>
FIG. 5 shows a cross-section (DX-DY direction) in a state before and after the structure (11, 12) of the PDP 10 is overlapped or sealed. (A) is the previous state, and (b) is the subsequent state. The protective layer 4 is omitted. The sealing portion 42 is formed at the chamfered portion of the corner of the outer peripheral portion (outside of the groove 14) of the second structure 12, which is a portion where the first structure 11 and the second structure 12 overlap in a plane. Is configured.

5A, a to c are the same as those described above (FIG. 4), and e is a place where the sealing material 42 (sealing material 42a in an applied state) on the front side is applied and arranged. The sealing material 42 (42a) of e is applied and disposed on the outer peripheral portion (the surface of the dielectric layer 3 or the protective layer 4) of the first structure 11 corresponding to the chamfered position of a. The sealing material 42 (42a) is, for example, a sealing paste made of a low melting point glass frit material and has adhesiveness.

In FIG. 5B, f indicates that the sealing material 42 (sealed material 42b in a filled or fixed state) is composed of the first structure 11 (the chamfered portion of a) and the second structure 12 (dielectric layer 3 or A wedge-shaped gap sandwiched between the protective layers 4) is shown filled or fixed by deformation. The sealing material 42 (42b) becomes a fixed state by heat treatment. g is a plane part (a dielectric layer 3 or a protective layer 4) on the first structure 11 side and a plane part (a peripheral portion of the glass substrate 5) on the second structure 12 side facing each other (contacting). R4) and the sealing material 42 is not disposed.

The discharge space 13 is a space that is surrounded by the flat surface of the first structure 11 and the groove 14 of the second structure 12, is partitioned by the barrier ribs 8 and the like, and is filled with discharge gas. R0 to R5 indicate regions in the plane direction (DX, DY) and their lengths. R0 is a portion of the groove 14 corresponding to the display area 40 (location c). R1 is a portion of the groove 14 corresponding to the non-display area 41 (location b). R2 is an outer peripheral portion where the groove 14 is not formed in the second structure 12 (back substrate 5). R 3 is an outer peripheral portion (an overhang portion 43) that protrudes outward from the second structure 12 in the first structure 11 (back substrate 1). R4 is the abutting plane portion of g. R5 is a region where the sealing material 42 is disposed.

<Exhaust section (1)>
Next, features of the PDP 10 will be described with reference to FIGS.

6 shows a configuration in the vicinity of the exhaust / exhaust portion 50 (the exhaust / exhaust groove 51A and the exhaust / exhaust pipe 52) in the PDP 10 (front substrate structure 11) of the first embodiment. In the schematic cross-section (DY-DZ direction) of the PDP 10 shown in FIG. 6 (a), an exhaust portion 50 in the DY direction is provided in a part of the outer peripheral portion. As the ventilating part 50, a ventilating groove 51 A (groove arrangement area 51 a) in the DY direction is provided on the side of the outer peripheral part of the first structure 11 that comes into contact with the outer peripheral part of the second structure 12. A ventilating pipe 52 (pipe arrangement area 52a) extending in the DY direction from the panel side surface is provided on the outside of the groove 51A.

In FIG. 6B, for example, a semi-cylindrical groove 51 A is provided on the first structure 11 (front substrate 1) side corresponding to the position d in the second structure 12 (back substrate 5). . The groove 51 A is exposed (opened) to the outside at the projecting portion 43. In the portion d, the chamfer of the a is not present, and the sealing material 42 is not disposed.

6 (c), one open end of the cylindrical tube 52 is attached so as to cover the exposed portion of the groove 51A of the overhang portion 43. One open end of the tube 52 has a shape in which a part, that is, the lower semi-cylindrical portion is cut according to the shape of the portion to be attached (the shape of the step by the protruding portion 43). The cut part of the tube 52 hits the upper surface and side surface of the first structure 11 near the groove 51A, and the upper side of the open end of the tube 52 hits the side surface of the second structure 12, so that there is no leakage of exhaust air. Mounted in shape. The tube 52 is made of a material such as glass, ceramic, or metal.

<Exhaust section (2)>
FIG. 7 shows a cross-sectional configuration regarding the groove (exhaust groove) 51 A and the pipe (exhaust pipe) 52 in the exhaust section 50. (A) shows the arrangement configuration of the groove 51A and the pipe 52, and (b) shows a cross section of the groove 51A and the pipe 52 (in the DY-DZ direction, a cross section at the central axis of the pipe 52). For easy understanding, in each drawing, the thickness (Hd) of the groove 14 (partition wall 8 etc.) is shown larger than the actual thickness with respect to the thickness (Ha, Hb) of the structure (11, 12). .

7A, the arrangement area 51a of the air exhaust groove 51A provided on the first structure 11 side is indicated by a broken line frame. Similarly, the arrangement area 52a (whole) of the exhaust / exhaust pipe 52 is indicated by a broken line frame. The length of the groove 51A in the DY direction is at least the length from the side surface end of the panel to the non-display area 41 (R1, b portion). b and d are the same as described above. Ha is the thickness of the first structure 11, and Hb is the thickness of the second structure 12 (outer peripheral part (R2)). As an example, Ha and Hb are set to the same level. Hb is, for example, 1.8 mm.

7B, h is a part of the original cylindrical tube 52 that is partially cut. La is the outer diameter of the tube 52, Lb is the inner diameter of the tube 52, and Lc is the thickness of the tube 50. Hc is the maximum depth (radius) of the exhaust groove 51. Hd is the depth of the groove 14. p denotes a ventilation path that communicates between the panel internal space (discharge space 13) and the outside through the ventilation section 50. R6 is the region and length of the tube 52 in the DY direction from the side surface end of the panel (the overhang portion 43 (R3)). Hd is, for example, 100 to 200 μm, and is smaller than Hb.

In this example, the central axis of the tube 52 is the same as the position of the contact plane between the first structure 11 and the second structure 12. Further, the diameter (Hc) of the groove 51A on the front substrate 1 side and the inner diameter (Lb) of the tube 52 are set to be approximately the same. In this example, the outer diameter (radius: La / 2) of the tube 52 is larger by the thickness (Lc) of the tube 51 than the size (Hc) of the groove 51. Increasing the diameter of the pipe 52 is desirable in terms of exhaust efficiency. Therefore, in order to mount the tube 52, one open end of the tube 52 is partly cut as indicated by h to cover the groove 51A on the front substrate 1 side. The pipe 52 has a diameter that extends over the side surfaces of the front and rear structures (11, 12), and is larger than the depth of the groove 51A (Hc <Lb). The depth of the groove 51A is larger than the depth of the groove 14 (Hd <Hc). The outer diameter (La) of the tube 52 is smaller than the panel thickness (Ha + Hb).

The length of the pipe 52 (R6 or R3 + R6) can be the same as or longer than the length of the convex part of the exhaust pipe (90) of the conventional PDP (FIG. 15). The length of the tube 52 is easy to ensure because the tube 52 is arranged parallel to the panel plane.

<Ventilation part (3)>
In FIG. 8, corresponding to the cross-sectional configuration of FIG. 7 (FIG. 8A), the plane (DX-DZ direction) of the ventilation section 50 viewed from the side of the panel in FIG. 8B, and FIG. ) Schematically shows the configuration of the plane (DX-DY direction) of the air exhaust section 50 viewed from the back side of the panel. The configuration related to mounting and sealing is also shown.

8 (a) to 8 (c), one open end of the tube 52 is connected (sealed) to the side surface of the panel and the flat surface of the overhanging portion 43 by the sealing material 45 at a position d. In FIG. 8B, the cross section of the tube 52 is circular, the upper half side leads to the space of the groove 51 A, and the lower half side abuts against the second structure 12. The cross section of the tube 52 may be other shapes such as an ellipse.

<Exhaust section (4)>
FIG. 9 shows a structure for attaching the pipe 52 to the groove 51A (part of the panel assembly / sealing process) corresponding to FIG. 6 and the like. (A) is a state in which a sealing material 42 (sealing material 42c in an applied state) is applied and disposed on the outer peripheral portion of the panel (the chamfered portion a) in the vicinity of d, and (b) in FIG. The attached (arranged) state, (c) is the state where the sealing material 45 is applied and arranged on the tube 52.

9A, the sealing material 42 (sealing material 42c) for the outer peripheral portion of the panel is applied wider than the chamfered size a. The sealing material 42 is not disposed in the immediate vicinity of the groove 51 and the tube 52.

In FIG. 9B, the tube 52 is positioned and mounted (arranged) with respect to the exposed portion of the groove 51A. In this state, the tube 52 is not yet sealed.

In FIG. 9C, a sealing material 45 for sealing the tube 52 is applied and disposed at a connection boundary portion between the tube 52 and the substrate (11, 12). Thereafter, the whole including the outer peripheral portion of the panel and the tube 52 is sealed by heat treatment. Thereby, the pipe | tube 52 is fixed.

The above is the case of the method of sealing the outer periphery of the panel and the tube 52 together. Each sealing

material

42 and 45 can use the same thing.

(Embodiment 2)
A PDP 10 according to Embodiment 2 of the present invention will be described with reference to FIGS. In the second embodiment, a groove 51 (51B) is provided on the back substrate structure 12 side.

In FIG. 10, the structure of the ventilation part 50 (groove 51B, pipe | tube 52) in PDP10 of Embodiment 2 is shown. A groove 51B is provided in the outer peripheral portion on the back side, which has a smaller planar area than the front side. Therefore, the length (DY direction) of the groove 51B is shorter than the groove 51A of the first embodiment. The tube 52 can be the same as that in the first embodiment.

FIG. 11 shows a cross-sectional configuration of the ventilating portion 50 of the second embodiment. He is the depth (radius) of the groove 51B. The depth (He) of the groove 51 B is larger than the depth (Hd) of the groove 14 corresponding to the discharge space 13.

(Embodiment 3)
A PDP 10 according to Embodiment 3 of the present invention will be described with reference to FIGS. In the third embodiment, grooves 51 (51C) are provided on both the front substrate structure 11 side and the back substrate structure 12 side. The configuration of the third embodiment can be regarded as an extension of the region of the groove 51 from the groove 51 in one of the front and rear substrate structures to the other substrate structure side.

In FIG. 12, the structure of the ventilation part 50 in PDP10 of Embodiment 3 is shown. As an example, the groove 51C of the third embodiment is a combination of the

grooves

51A and 51B of the first and second embodiments. That is, the groove 51C is a cylindrical space in the region on the second structure 12 side, and is semicylindrical in the region on the first structure 11 side. Further, the pipe 52 can be the same as in the first and second embodiments.

FIG. 13 shows a cross-sectional configuration of the ventilating portion 50 of the third embodiment. Hf is the size (diameter) of the groove 51C. In this example, the size (Hf) of the groove 51C is approximately the same as the inner diameter (Lb) of the tube 52. For example, it is possible to set Hf <Lb.

<PDP manufacturing method>
Next, in FIG. 14, the example of the flow of the manufacturing method of PDP10 regarding each embodiment mentioned above is shown (S represents a process).

In the manufacturing process S10 of the first structure 11, in order, formation S11 of the glass substrate (front substrate) 1 (including (a) formation S11A of the exhaust groove 51A), formation of display electrodes (X, Y) S12, The first dielectric layer 31 is formed S13, the address electrode 23A is formed S14, the second dielectric layer 32 is formed S15, and the protective layer 4 is formed S16.

In the manufacturing process S20 of the second structure 12, in order, formation of a glass substrate (back substrate) 5 S21 (formation of a groove 14 including a partition wall S21A, chamfering S21B of an outer peripheral portion, and (b) formation of an exhaust groove 51B. S21C and the like), and phosphor 9 formation step S22.

After the first structure 11 and the second structure 12 are manufactured, the panel assembly / outer periphery sealing step S31 ((c) mounting the exhaust pipe 52 S31A, (d) arranging the sealing material and heat-treating S31B Etc.), exhaust gas and discharge gas sealing step S32, aging / testing step S33, and the like.

The characteristic processes include (a) to (d). In the first embodiment, the groove 51A is formed on the front side in S11A of (a). In the second embodiment, the groove 51B is formed on the back side in S21C of (b). In the third embodiment, the groove 51C is formed by both (a) and (b).

In the production process S10 of the first structure 11, in S11, the flat glass substrate 1 is formed by cutting or the like. In the case of the first and third embodiments, in S11A of (a), the above-described exhaust groove 51A is formed in a part of the glass substrate 1 by cutting or the like.

In S12, a group of display electrodes (X electrode 21, Y electrode 22) is formed on the glass substrate 1 by a screen printing method, a photolithography + etching method, or the like. For example, the transparent electrode 2a and the bus electrode 2b are sequentially formed in a predetermined pattern.

In S13, the first dielectric layer 31 is formed flat on the glass substrate 1 so as to cover the display electrode (X, Y) group. For this formation, for example, a paste for a dielectric layer made of a low melting point glass material such as silicon oxide (SiO ₂ ) or the like is applied by a screen printing method or the like, and a low melting point glass material is deposited on the target surface. This is performed by a vapor deposition method such as a plasma CVD method.

In S14, the address electrode 23 (A) group is formed on the first dielectric layer 31 by, for example, the same method as the bus electrode 2b. In S15, the second dielectric layer 32 is formed flat on the first dielectric layer 31 so as to cover the address electrode 23 group. In S16, the protective layer 4 is formed so as to cover the entire surface of the second dielectric layer 32 (corresponding to the display region 40). For this formation, for example, a vapor deposition method using MgO, a sputtering method, a coating method, or the like can be used.

In the manufacturing process S20 of the second structure 12, in S21, the flat glass substrate 5 is formed by cutting or the like. In S21A, the flat surface of the original glass substrate 5 is scraped off by predetermined patterning, for example, by a sandblasting method, and baked, thereby forming the grooves 14 including structures such as the partition walls 8 and the ventilation path (see FIG. 4). The structure of the partition walls 8 and the like can be variously changed by changing the mask pattern of the sandblast formation process. Further, in S21B, the corners of the outer peripheral portion of the glass substrate 5 are chamfered except for a part (location of d) as in the above-described a (FIG. 4).

In the case of

Embodiments

2 and 3, in S21C of (b), the above-described exhaust groove 51B is formed in a part of the glass substrate 5 by cutting or the like.

In S22, phosphors 9 (9r, 9g, 9b) are formed in the regions between the barrier ribs 8 in the grooves 14 of the back substrate 5 according to the colors of R, G, B. For example, it is formed by applying a phosphor paste by a method such as a screen printing method or a dispenser and baking it.

Regarding the formation of the air exhaust groove 51, when the groove 51A is formed on the front surface side, for example, the groove 51A is formed on the glass substrate 1, and then the electrodes and other layers are formed on the glass substrate 1 except for the groove 51A. There is a method of forming such as. Alternatively, there is a method in which electrodes and other layers are formed on the glass substrate 1 and then the grooves 51A are formed. Either is possible. Further, when the groove 51B is formed on the back side, there is a method of forming the exhaust groove 51B together with the formation of the groove 14 in the step (S21A) of forming the groove 14 including the partition wall 8 and the like on the back substrate 5. is there. Alternatively, it is of course possible to separate the formation of the groove 14 (S21A) and the formation of the groove 51 (S21C).

In the panel assembly / sealing step S31, the front and rear structures (11, 12) are overlapped and the outer periphery is sealed to assemble the panel. Panels are placed in the furnace, and heat treatment and exhaust / exhaust treatment are performed. In this example, sealing of the outer peripheral portion of the panel (portion a) and sealing near the tube 52 are performed in the same process, but can be performed in separate processes.

In S31A of (c), the exhaust / exhaust pipe 52 is attached to the exhaust / exhaust groove 51 (FIG. 9). In S31B, sealing

materials

42 and 45 are applied and arranged on the outer periphery of the panel and the vicinity of the tube 52, respectively. The entire members are aligned and arranged. In this state, the whole is heat-treated (fired) at once. Thereby, each sealing

material

42 and 45 is melted and fixed (FIG. 9). The sealing

materials

42 and 45 are heated to melt above their softening point and then solidified by cooling.

Thereafter, with the fixing of the sealing

materials

42 and 45, in S32, the panel internal space is evacuated through the exhaust / exhaust section 50, and subsequently, a discharge gas such as Ne or Xe is filled. By sealing one open end of the tube 52 using a burner or the like, the discharge space 13 is finally sealed and sealed. In this process, external piping and a gas processing system device are connected to the opening end on the outside of the pipe 52.

In S33, the product is completed by performing aging (stabilization) in which a drive circuit is connected to the manufactured panel and a voltage is applied to the electrode, and a panel lighting test and display quality confirmation are performed.

<Effect of Embodiment>
As described above, according to each embodiment, the following effects can be obtained. In the exhaust / exhaust portion 50 in the DY direction, the exhaust / exhaust pipes 52 are disposed outside the side surface of the panel and parallel to the extension of the panel plane (DX-DY). Even with a tendency to reduce the thickness of the panel, the diameter of the pipe 52 can be sufficiently secured to ensure the exhaust efficiency. By setting the outer diameter (La) of the tube 52 within the panel thickness (Ha + Hb), the maximum thickness of the PDP 10 is defined by the thickness (Ha + Hb) of the panel itself. That is, the effect of reducing the overall thickness of the panel can be obtained.

In the conventional PDP as shown in FIG. 15, a sealing portion (sealing material) 49 on the outer periphery of the panel exists between the front and rear substrate planes. In order to overlap and seal the front substrate structure 11 and the back substrate structure 12, the sealing material 49 needs to have the same amount as the height of the partition wall 8. For example, the sealing material 49 is limited to the sealing material 49 and the sealing process. There is.

Consider a configuration in which a groove or a tube for ventilating air is formed in the conventional sealing portion 49 itself or an area adjacent thereto as in the present embodiment. In this case, there are problems such as causing deformation of the sealing material 49, poor physical stability of the pipe, and difficulty in securing the diameter of the exhaust path, which is not preferable.

For example, regarding the deformation of the sealing material 49, when a groove or a tube that communicates with the inside or outside of the panel is provided in a part of the frame-shaped sealing portion 49 or a region adjacent thereto, the sealing material 49 is sealed by heat treatment at the time of sealing. The dressing 49 is contracted and deformed so as to spread in the gap.

On the other hand, in the PDP 10 having the front three-electrode structure according to the present embodiment, the exhaust groove 51 and the pipe 52 are formed using the substrate (location d) instead of the sealing portion 42. In this structure, since the structures (11, 12) are in planar contact with each other at the outer peripheral portion (R4), the sealing material 42 is disposed at the chamfered portion (the a) and the vicinity thereof. The sealing material and the sealing process are less restricted.

Therefore, in this embodiment, there is no problem as in the above prior art example. That is, there is no deformation of the sealing material 42, the physical stability of the pipe 52 is good, the diameter of the ventilation path is secured, and the ventilation efficiency is good.

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, and various modifications can be made without departing from the scope of the invention. Needless to say.

The present invention can be used for a plasma display device or the like.

Claims

A plasma display panel having a first substrate structure on the front side on which electrodes are formed, and a second substrate structure on the back side in which a phosphor including a partition structure is formed and a phosphor is formed between the partition walls. And
The first substrate structure has a larger planar area than the second substrate structure, and has an overhang portion formed by the first substrate structure on an outer peripheral portion of the panel,
A part of the outer peripheral portion of the first substrate structure is provided with a first exhaust groove that communicates between the internal space by the groove of the panel and the outside in a first direction parallel to the panel plane;
A vent / exhaust pipe extending in the first direction is connected to an end leading to the outside of the first vent / exhaust groove, and the vent duct has a shape in which one opening end is partially cut. The plasma display panel is characterized in that the cut portion is connected so as to cover an end portion that leads to the outside of the first ventilation groove.
The plasma display panel according to claim 1, wherein
In the outer peripheral portions of the first and second substrate structures, the flat surfaces are in contact with each other, and a chamfered portion is provided at an end portion on the front surface side of the outer peripheral portion of the second substrate structure. A first sealing material for sealing the outer periphery of the first and second substrate structures is provided,
Of the outer periphery of the first and second substrate structures, the chamfered portion is not provided in the portion where the exhaust groove is provided, and the cut portion of the exhaust pipe and the first and second substrate structures are not provided. A plasma display panel, wherein a second sealing material is provided at a connection boundary portion between the plasma display panel and the plasma display panel.
The plasma display panel according to claim 1, wherein
The plasma display panel according to claim 1, wherein an inner diameter of the exhaust / exhaust pipe is equal to or greater than a diameter of the exhaust / exhaust groove.
The plasma display panel according to claim 1, wherein
The plasma display panel according to claim 1, wherein an outer diameter of the exhaust pipe is equal to or less than a thickness of the main panel including the first and second substrate structures.
A plasma display panel having a first substrate structure on the front side on which electrodes are formed, and a second substrate structure on the back side in which a phosphor including a partition structure is formed and a phosphor is formed between the partition walls. And
The first substrate structure has a larger planar area than the second substrate structure, and has an overhang portion formed by the first substrate structure on an outer peripheral portion of the panel,
A part of the outer periphery of the second substrate structure is provided with a second exhaust groove that communicates between the internal space by the groove of the panel and the outside in a first direction parallel to the panel plane;
A vent / exhaust pipe extending in the first direction is connected to an end of the second vent / exhaust groove that leads to the outside, and the vent pipe has a shape in which one open end is partially cut. The plasma display panel, wherein the cut portion is connected so as to cover an end portion that leads to the outside of the second exhaust groove.
The plasma display panel according to claim 5, wherein
In the outer peripheral portions of the first and second substrate structures, the flat surfaces are in contact with each other, and a chamfered portion is provided at an end portion on the front surface side of the outer peripheral portion of the second substrate structure. A first sealing material for sealing the outer periphery of the first and second substrate structures is provided,
Of the outer periphery of the first and second substrate structures, the chamfered portion is not provided at the portion where the exhaust groove is provided, and the cut portion of the exhaust pipe and the first and second substrate structures are not provided. A plasma display panel, wherein a second sealing material is provided at a connection boundary portion between the plasma display panel and the plasma display panel.
The plasma display panel according to claim 5, wherein
The plasma display panel according to claim 1, wherein an inner diameter of the exhaust / exhaust pipe is equal to or greater than a diameter of the exhaust / exhaust groove.
The plasma display panel according to claim 5, wherein
The plasma display panel according to claim 1, wherein an outer diameter of the exhaust pipe is equal to or less than a thickness of the main panel including the first and second substrate structures.
A plasma display panel having a first substrate structure on the front side on which electrodes are formed and a second substrate structure on the back side in which a phosphor including a partition structure is formed and a phosphor is formed between the partition walls. And
The first substrate structure has a larger planar area than the second substrate structure, and has an overhang portion formed by the first substrate structure on an outer peripheral portion of the panel,
A part of the outer periphery of the first and second substrate structures has a third exhaust groove that communicates between the interior space of the panel and the outside in a first direction parallel to the panel plane. Provided,
A vent / exhaust pipe extending in the first direction is connected to an end portion that leads to the outside of the third vent / exhaust groove, and the vent duct has a shape in which one open end is partially cut. The plasma display panel is characterized in that the cut portion is connected so as to cover an end portion that leads to the outside of the third exhaust groove.
The plasma display panel according to claim 9, wherein
In the outer peripheral portions of the first and second substrate structures, the flat surfaces are in contact with each other, and a chamfered portion is provided at an end portion on the front surface side of the outer peripheral portion of the second substrate structure. A first sealing material for sealing the outer periphery of the first and second substrate structures is provided,
Of the outer periphery of the first and second substrate structures, the chamfered portion is not provided in the portion where the exhaust groove is provided, and the cut portion of the exhaust pipe and the first and second substrate structures are not provided. A plasma display panel, wherein a second sealing material is provided at a connection boundary portion between the plasma display panel and the plasma display panel.
The plasma display panel according to claim 9, wherein
The plasma display panel according to claim 1, wherein an inner diameter of the exhaust / exhaust pipe is equal to or greater than a diameter of the exhaust / exhaust groove.
The plasma display panel according to claim 9, wherein
The plasma display panel according to claim 1, wherein an outer diameter of the exhaust pipe is equal to or less than a thickness of the main panel including the first and second substrate structures.
A method for manufacturing a plasma display panel, comprising: a front substrate; a rear substrate facing the front substrate; and a discharge space between the front substrate and the rear substrate,
Forming a ventilation groove extending outward from the discharge space in an outer peripheral portion of the front substrate protruding in a planar direction with respect to the rear substrate;
Bonding the front substrate and the back substrate;
Disposing a ventilation pipe extending in the plane direction from the discharge space to the outside in the ventilation groove, and
The exhaust pipe has a first end portion on the outer side and a second end portion on the discharge space side, and the second end portion has a partially cut shape. A method of manufacturing a plasma display panel.
In the manufacturing method of the plasma display panel of Claim 13,
At the outer periphery of the front substrate and the rear substrate, the flat surfaces are in contact with each other, a chamfered portion is provided at the front end of the outer peripheral portion of the rear substrate, and the front substrate and the rear substrate are formed in the space by the chamfered portion. A step of providing a first sealing material for sealing the outer peripheral portion of
The chamfered portion is not provided in the portion of the outer peripheral portion of the front substrate and the rear substrate where the exhaust / exhaust groove is provided, and the second portion is connected to the connection boundary portion between the cut portion of the exhaust / exhaust pipe and the front substrate and the rear substrate. A process for producing a plasma display panel, comprising the step of:
In the manufacturing method of the plasma display panel of Claim 13,
The method of manufacturing a plasma display panel, wherein an inner diameter of the exhaust / exhaust pipe is equal to or larger than a diameter of the exhaust / exhaust groove.
In the manufacturing method of the plasma display panel of Claim 13,
The method of manufacturing a plasma display panel, wherein an outer diameter of the exhaust pipe is equal to or less than a thickness of the main panel including the front substrate and the rear substrate.