JP2000122571A - Tile type picture display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tile type picture display device permitting to reduce non-display areas formed between display elements arranged adjacently. SOLUTION: An FED 30 is comprised of plural lines of 1st end face wiring 70 arranged on an end face 46 of a front plate and connected with plural lines of anodes 50 in the inner face 32, plural lines of rear face wiring 74 arranged on the rear face 66 of the back face plate 38 and connected with an unshown drive circuit, and plural lines of side face connection wiring 78 arranged on a sealant 82 on the side face and connecting the 1st end face wiring 70 and the rear face wiring 74 with each other. Thus, the anodes 50 are connected with the rear face wiring 74 on the rear face 66 on the back face plate 38 via the side face connection wiring 78 arranged on the 1st end face wiring 70 and the sealant 82, therefore, the anodes 50 arranged on the inner face 32 of the front face plate spatially separated from the rear face plate 38 can be led out only via the wiring 70, 78, 76 extending in the direction along the end face 46.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tile-type image display device used by forming a large screen with a plurality of images.

[0002]

2. Description of the Related Art For example, when an image is displayed for a large number of viewers indoors or outdoors such as a stadium or the like, an extremely large display surface is required due to a long viewing distance. Therefore, for such applications, as shown in FIG. 1, a large number of small tile-type display elements (tile-type image display devices; hereinafter, simply referred to as display elements) 10 capable of displaying images are arranged vertically and horizontally. Thus, a so-called multi-screen image display device 12 having a large display surface is used. It is difficult to integrally form the image display device 12 having a large display surface, and when displaying a single image on the whole of the plurality of display elements 10 arranged vertically and horizontally, when the viewing distance is long, the display is not performed. This is because the boundaries between the elements 10 do not significantly impede the continuity of the image. Such a display element 10 is, for example, a vacuum fluorescent display (VFD) or a field emission display (FE), which excites a phosphor with electrons emitted from an electrode to emit light.
D), a plasma display panel (PDP) using gas discharge, or a liquid crystal display (Liquid Crystal Display:
(Hereinafter, referred to as LCD).

[0003]

By the way, the display element 10 as described above has, for example, a first flat plate which is translucent and located on the viewing side, and which is located at a predetermined distance from the first flat plate. And a second flat plate joined to the first flat plate by a fixing agent such as a glass frit or a resin adhesive at a peripheral portion. The space sandwiched between the first and second flat plates is divided into a plurality of pixels arranged vertically and horizontally. In a self-luminous device such as an FED or a PDP, a selection for selectively emitting the plurality of pixels is performed. The light transmission type device such as an LCD is provided with electrodes for selecting pixels through which light is transmitted. Generally, at least one of these pixel selection and light emission electrodes is provided on the inner surface of the first flat plate located on the viewing side in any of the display elements.

On the other hand, a circuit connection wiring for connecting each electrode to a drive circuit is provided to a second wiring so as not to disturb the display of the electrodes provided on the inner surface of the first flat plate and the inner surface of the second flat plate. It must be provided on the back side of the flat plate. Therefore, in the conventional display element, for example, FIG.
The first flat plate 14 located on the viewing side is changed to the second flat plate 16 so as to show a schematic configuration with the two display elements 10 and 10 arranged side by side.
By forming the first flat plate 14 in a larger area than the first flat plate 14
A terminal portion 18 protruding outside the second flat plate 16 is provided on the peripheral edge portion of the second flat plate 16. The ends of the plurality of electrodes 22 formed on the inner surface 20 of the first flat plate 14 are
The terminal 18 is connected to a circuit connection wiring (not shown) which is exposed on the rear surface 24 of the second flat plate 16. In the figure, 26
Is a spacer for maintaining the interval between the first flat plate 14 and the second flat plate 16. However, such a terminal 1
8 forms a non-display area 28 between the display elements 10 and 10. Therefore, when the viewing distance is long, the display element 1
Although the boundary between 0 and 10 is not so important, it has been desired that the non-display area 28 be made as small as possible in order to further improve the display quality such as the continuity of the image.

[0005] For example, in Japanese Patent Application Laid-Open No. 6-314066, the terminals of the electrodes 22 of the first flat plate 14 are collected at one end and arranged side by side at the other end. A technique for reducing the non-display area 28 at the boundary between the display elements 10 and 10 has been proposed. However, even in this case, it is necessary to provide the terminal portion 18 on at least one side of each display element 10. Therefore, in the longitudinal direction of the electrode 22 on which the terminal portion 18 is formed, the number of display elements 10 that can be arranged without forming a large non-display area 28 is only two. Therefore, the above technique cannot be applied to a larger image display device 12 as shown in FIG. 1, which cannot be formed unless more display elements 10 are arranged vertically and horizontally.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to reduce the non-display area formed between adjacently arranged components. It is to provide a tile type image display device.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a light transmitting device which is positioned at a predetermined distance from each other and which is joined to each other at a peripheral portion by a predetermined joining member. And a plurality of electrodes provided on an inner surface of the first flat plate, and a plurality of the first and second flat plates are arranged such that the first flat plate is located on the viewing side. A tile-type image display device for forming a large screen by arranging the side surfaces connecting end faces of a flat plate and a second flat plate vertically and horizontally, wherein (a)
A plurality of first end surface wirings provided on an end surface of the first flat plate and connected to the plurality of electrodes, respectively, and (b) a back surface of the second flat plate located on a side opposite to the first flat plate. A plurality of back wirings provided and connected to a predetermined drive circuit; and (c) the plurality of first end wirings and the plurality of back wirings provided on the joining member on the side surface and interconnecting each other. And a plurality of side connection wires to be connected.

[0008]

According to this structure, a plurality of first end surface wirings provided on the end surface of the first flat plate and connected to a plurality of electrodes provided on the inner surface thereof, respectively, and a back surface of the second flat plate are provided. A plurality of back wirings provided and connected to the driving circuit;
A tile-type image display device is configured to include a plurality of first side surface wirings and a plurality of side surface connection wirings which are provided on the joining member on the side surfaces and connect the plurality of first end surface wirings and the back surface wirings respectively. Therefore, the electrodes provided on the inner surface of the first flat plate are:
By providing the side connection wiring on the joining member for joining the first and second flat plates to each other, the first and second flat plates are connected to the back wiring on the back surface of the second flat plate via the first end surface wiring and the side connection wiring, Further, since the electrode is connected to a predetermined drive circuit via the rear surface wiring, the electrode provided on the inner surface of the first flat plate spatially separated from the second flat plate extends in the direction along the end surface. It is pulled out only by wiring. Therefore, it is not necessary to form the first flat plate with a larger area than the second flat plate for the purpose of providing the electrode terminals. Therefore, it is possible to reduce the non-display area formed at the boundary when a large number of sheets are arranged vertically and horizontally. it can.

[0009]

In another preferred embodiment of the present invention, preferably, the tile-type image display device comprises: (d) a plurality of tile-type image display devices provided on an end face of the second flat plate and respectively connected to the plurality of back surface wirings. (C-2) the plurality of side surface connection wires, wherein one end of the plurality of side surface connection wires is connected to the plurality of second end surface wires so that the plurality of first end surface wires and the plurality of side connection wires are connected to each other. Are connected to each other. According to this configuration, the plurality of second end surface wirings connected to the plurality of back surface wirings are provided on the end surface of the second flat plate, and one end of each of the plurality of side surface connection wirings is the plurality of second end surfaces. By being connected to the wiring, the plurality of first end wirings and the back wiring are connected to each other. Therefore, since it is not necessary to directly connect the side surface connection wiring, which is difficult to form with high precision because it is provided on the joining member on the side surface, it is particularly necessary to secure conduction between the side surface wiring and the back surface wiring. Thus, the wirings and electrodes can be easily formed so as to be connected to each other.

Preferably, (e) the joining member is provided such that the side surface is substantially flat. With this configuration, the joining member for joining the first and second flat plates is provided so that the side surface of the tiled image display device is substantially flat. Therefore, since the side surface is substantially flat, the side surface connection wiring for connecting the first end surface wiring and the back surface wiring can be easily formed with high precision.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a perspective view, partially cut away, showing the configuration of an FED 30 which is an embodiment of the tile type image display device of the present invention. In the figure, the FED 30 includes a front plate 36 and a back plate 38 which are arranged in parallel with each other so that their substantially flat surfaces 32 and 34 face each other and have similar dimensions and shapes, and the front plate 36 and the back plate 38. A spacer 42 is provided therebetween and forms an airtight space 40 by joining them at a predetermined interval. In addition, the outer peripheral surface 44 of the spacer 42 is actually positioned so as to be recessed inward from the end surfaces 46 and 48 of the front plate 36 and the rear plate 38, and the outer peripheral surface 44 hermetically seals each other. For the sake of convenience, but these are omitted for convenience of explanation.

The front plate 36 and the back plate 38 are made of soda-lime glass having a uniform thickness of, for example, about 1 to 2 (mm) and a light-transmitting softening point of about 600 (° C.). It consists of. Also, the spacer 42
Has, for example, a rectangular frame shape or a lattice shape having the same outer dimensions as the front plate 36 and the back plate 38. The spacer 42 has a thickness of 0.3 (mm) made of, for example, a 426 alloy.
An insulating glass layer (not shown) made of borosilicate glass having a softening point of about 600 (° C) is applied to a thickness of about 10 (μm) on the surface of a rectangular frame or grid material having a uniform thickness of about 10 (μm). It is provided by wearing or the like. Therefore, the airtight space 4
The height of 0 is, for example, about 0.3 (mm). The width dimension of the spacer 42 (the thickness dimension in the plane direction of the inner surface 32)
Is, for example, 0.5 (mm) in the portion that constitutes the outer peripheral edge of the airtight container
In the case of the lattice-shaped spacer 42, the width dimension of the portion located at the inner peripheral portion is formed to be about four times the size of the outer peripheral portion thereof. In the drawings, the thickness of the spacer 42 is exaggerated for convenience of explanation.

On one surface 32 of the front plate 36, a plurality of stripe-shaped transparent anodes 50 made of, for example, ITO (Indium Tin Oxide) are provided side by side in one direction. . Those multiple anodes 5
For example, a phosphor layer 52 corresponding to any one of the three emission colors of R (red), G (green), and B (blue) is formed on the surface of , G, B in order. The anode 50 is formed to a thickness of, for example, about 1 (μm) by a thin film method such as sputtering, and has a sheet resistance of 10 (Ω /
□) It has a relatively high conductivity of below. Also,
The phosphor layer 52 is made of, for example, ZnO: Zn, ZnS: Ag + In ₂ O _3.
Is composed of a material that emits visible light by an electron beam such as a thick film screen printing method.
By being provided with a thickness of about 10 to 20 (μm), the sheet has a conductivity of about 500 (Ω / cm ² ) or less.

A black mask 54 made of, for example, glass containing a black pigment is provided with a thickness of about 10 to 20 (μm) on the other surface 32 where the phosphor layer 52 is not provided. The surface of the phosphor layer 52 and the surface of the black mask 54 are approximately 1000 to 2000 (面) provided on the entire surface 32 according to the surface shapes of the phosphor layer 52 and the black mask 54. It is covered with a reflective film 56 made of a thin aluminum film. The black mask 54 is provided by, for example, a thick film screen printing method or the like.
Is provided with a smooth surface by vapor deposition or the like, for example. For this reason, the FED 30 cannot observe the light emission of the phosphor layer 52 from the rear plate 38 side, and the front plate 36
This is a so-called transmission type self-luminous display device that observes light transmitted through the phosphor layer 52 from the side. In the present embodiment, the front plate 36 corresponds to the first flat plate, and the one surface 32 corresponds to the inner surface thereof.

Further, on one surface 34 of the back plate 38,
A plurality of cathode electrodes 58 and gate electrodes 60 are provided orthogonal to each other and insulated by an insulating film (not shown) made of silicon dioxide (SiO ₂ ) or the like. While a plurality of electron passage holes 62 are provided, a plurality of emitters (cold cathodes) 64 are provided on the cathode electrode 58 at portions corresponding to the electron passage holes 62.

The cathode electrode 58 is made of, for example, gold (A
The gate electrode 60 is made of a highly conductive metal such as u), and the gate electrode 60 is made of chromium (Cr) or the like. Also,
The emitter 64 is a conical cold cathode called a spindt type made of molybdenum (Mo), for example.
Each of the plurality is formed at a uniform height of about 1 (μm). These are all provided by a thin film method such as sputtering, similarly to the anode 50. In addition, the above-mentioned electron passage hole 6
Numerals 2 each have a substantially circular shape having a diameter of about 1 to 2 (μm), and are formed by, for example, partially removing the gate electrode 60 by ion etching or the like. Note that the above-described insulating film (not shown) is formed by the emitter 64.
The gate electrode 60 is provided so as to cover substantially the entire surface of the cathode electrode 58 except for the portion where the gate electrode 60 is formed, and the gate electrode 60 is formed on the insulating film. The gate electrode 60 is positioned closer to the front plate 36 than the tip of the emitter 64, and the distance between the gate electrode 60 and the surface of the phosphor layer 52 provided on the front plate 36 is, for example, 0.2 to 1 ( mm). In the drawing, four electron passage holes 62 and emitters 64 are provided at intersections at the intersections of the cathode electrode 58 and the gate electrode 60. About 2,000 electron passage holes 62 and emitters 64 are provided at each intersection.

For this reason, when a predetermined signal voltage and a predetermined scanning voltage are applied to the cathode electrode 58 and the gate electrode 60, respectively, the emitter 64 is caused by a field emission caused by a large voltage gradient between them.
The electrons are emitted from. These electrons fly toward the anode 50 through the electron passage holes 62 when a predetermined positive voltage is applied to the anode 50 provided on the front plate 36. Thereby, the electrons collide with the phosphor layer 52 provided on the anode 50, and the phosphor layer 52 emits light. At this time, the phosphor layer 52 is covered with the reflection film 56. The reflection film 56 is an aluminum thin film formed by vapor deposition, and is extremely thin and porous. Therefore, the electrons emitted from the emitter 64 and attracted to the anode 50 pass through the reflection film 56 and pass through the phosphor layer 5.
2 and strikes the phosphor particles in the layer. On the other hand, the light generated by the phosphor layer 52 is directed not only to the front plate 36 side but also to the rear plate 38 side, but the light directed to the rear plate 38 side is reflected by the reflection film 56 to the front plate 36 side. Therefore,
Since most of the generated light is emitted through the front plate 36, the substantial luminous efficiency is improved. In addition,
In this embodiment, the cathode electrode 58 and the gate electrode 6
One pixel is formed for each 0 intersection. Also, FED3
0 has an electric wiring for connecting the anode 50, the cathode 58, the gate 60 and the like, an exhaust hole for exhausting from the inside after forming an airtight container, etc., but these are omitted in the figure. are doing.

FIG. 4 is a view for explaining the configuration of connection terminals 68 and the like provided on the back surface 66 side of the back plate 38 for connecting the anode 50 to a drive circuit (not shown). Front panel 3
The tips of the plurality of anodes 50 provided on the inner surface 32 of No. 6 are located at the ridge of the boundary between the inner surface 32 and the end surface 46. A plurality of first end surface wirings 70 extending along the thickness direction of the front plate 36 are provided on the end surface 46 so as to be connected to each of the plurality of anodes 50. On the other hand, on the back surface 66 of the back plate 38, there are provided a plurality of back wires 74 connected to the connection terminals 68 via the flexible cords 72. Multiple second wires extending along the thickness direction of the
An end surface wiring 76 is provided, and the plurality of back surface wirings 7 are provided.
4 respectively. And end faces 46, 4
8 and the outer peripheral surface 44 of the spacer 42, the thickness of the front plate 36 and the rear plate 38 is located at the position where the first end surface wiring 70 and the second end surface wiring 76 are provided. A plurality of side connection wirings 78 extending along the width direction are provided so as to cover substantially the entirety thereof. The plurality of first end surface wirings 7 are respectively provided.
The back wiring 74, the second end wiring 76, and the side connection wiring 78 are formed by a vapor deposition method, a thick film printing method, a transfer method, a stamping method, or the like.
It has a thickness of about 0 (μm) and a width of about 100 (μm), and a plurality of them are electrically independent of each other.

For this reason, the plurality of anodes 50 on the inner surface 32 of the front plate 36 are connected to the first end surface wiring 70, the side surface connection wiring 78, and the second end surface wiring 7 provided on the side surface of the FED 30.
6 is connected to the back wiring 74, and further connected to the connection terminal 68 via the back wiring 74.
That is, the anode 50 is connected to the back wiring 74 of the back plate 38 only by the wirings 70 and 78 provided substantially along the side surface of the FED 30. Therefore, FED30
Back plate 3 of the portion provided for the connection at the peripheral edge of
8 The amount of protrusion from the outer peripheral edge is only about the same as the thickness of the wirings 70, 78 and the like. In the figure, 80
Is an end surface wiring provided for the purpose of connecting the cathode electrode 58 and the gate electrode 60 formed on the one surface 34 of the back plate 38 to the wiring provided on the back surface 66 in order to supply electricity to the cathode electrode 58 and the gate electrode 60. . Such end surface wirings 70, 76,
Reference numerals 80 and the like are provided not only on the two side faces shown in the drawing but also on the other two side faces with a similar structure as appropriate. For example, anode 5
For example, when it is desired to reduce the arrangement density of the back surface wiring 74 connected to the first side surface wiring 74, the first end surface wiring 70, the second end surface wiring 76, the side surface opposite to the side surface on which the side surface connection wiring 78 is provided.
In addition, a structure may be adopted in which side connection wirings 78 are provided and alternately connected from both ends of the anode 50 to the back wiring 74 and the back wiring having the same configuration.

FIG. 5 is a view for explaining a cross-sectional structure near the side connection wiring 78 and the like. In the figure, the front plate 3
The outer surface 44 of the spacer 42 provided between the rear plate 6 and the rear plate 38 is positioned on the inner side of the end surfaces 46 and 48 by about 0.2 to 0.5 (mm). On the other hand, the first end surface wiring 7
Numeral 0 is provided in the range from the end surface 46 to the peripheral edge of the front plate inner surface 32, and the anode 50 is formed so as to overlap the portion located on the inner surface 32. That is, the first end surface wiring 70 extends from the end of the anode 50 to the opposite side to the back surface 66 on which the connection terminal 68 is provided. Also, the second end surface wiring 76 is provided in a range extending over the peripheral portion of the back plate back surface 66 in the same manner as the first end surface wiring 70, and the front end of the back surface wiring 74 located at the peripheral portion of the back plate 66 is overlapped therewith. Is formed. The outer peripheral surface 44 of the spacer 42 and the first end surface wiring 7
A sealing material 82 made of, for example, glass frit or the like having a softening point of about 400 to 500 (° C.) is applied along the outer peripheral surface 44 so as to cover the first and second end surface wirings 76 and then subjected to a heat treatment. Thus, the front plate 36 and the rear plate 38 are hermetically sealed from each other, and the side surfaces of the FED 30 are made substantially flat. However, since the sealing material 82 is provided with a width sufficiently smaller than the thickness of the FED 30, a part of the first end wiring 70 on the front surface side of the front plate 36 and the back surface 66 of the second end wiring 76 are provided. A part of the side is not covered with the sealing material 82 and is exposed on the side surface. In the cross section shown in the figure, the sealing material 82 is located on the wirings 70 and 76 on the side surfaces, and on the anode 50 and the wiring 70 on the inner surface 32, respectively. 46,
The sealing material 82 is located directly on 48 or on the inner surface 32. In the drawing, the phosphor layer 52, the cathode electrode 58 and the like are omitted.

The side surface connection wiring 78 is formed on the sealing material 82 thus formed on the substantially flat surface.
At this time, both ends are overlapped on the exposed portions of the first end face wiring 70 and the second end face wiring 76, so that they are conducted. In other words, the side connection wiring 78 and the first
The end surface wiring 70 and the second end surface wiring 76 are directly overlapped with each other in the vicinity of the front surface 84 and the back surface 66 and are electrically connected to each other, but a sealing material 82 is interposed between them on the inner surfaces 32 and 34 side. Are separated from each other. The side surface connection wiring 78 is the first end surface wiring 7.
It can be said that it is formed so as to extend from the front end of the zero to the back surface 66. Therefore, strictly speaking, the dimensional expansion amount from the end surfaces 46 and 48 in the plane direction of the FED 30 is determined by the thickness of the wiring 70 or 76 and the thickness of the sealing material 82 and the thickness of the side surface connection wiring 78. M = 0.m, which is the amount of expansion at one end of the front plate 36 in the surface direction.
It is about 2 to 0.3 (mm). As described above, the width dimension of the peripheral portion of the spacer 42 is, for example, about 0.5 (mm).
Since the effective display area of the FED 30 is on the inner peripheral side of the spacer 42, the width of the non-display area at the peripheral edge of each FED 30 is about 1 (mm) or less, and a plurality of FEDs are used.
When the EDs 30 are arranged vertically and horizontally, the width of the non-display area formed at the boundary between them is about 2 (mm) or less, which is negligible for a large-sized image display device. In the FED 30 of the present embodiment, the interval between the plurality of light emitting sections provided in the element is, for example, about 2 (mm) or more, and the width of the non-display area is equal to the width of the plurality of light emitting sections of the large-sized image display device. The intervals are determined so as to be substantially uniform.

In this embodiment, the spacer 42
And a sealing material 82 constitute a joining member,
The sealing material 82 also serves as a seal for hermetically sealing. In the figure, reference numeral 86 denotes a front plate 36 and a rear plate 3.
These ribs are appropriately provided for the purpose of maintaining a space between the light-emitting sections and the light-emitting sections. In addition, the surface of the sealing material 82 actually has minute irregularities and cannot be said to be strictly flat, but the size of the irregularities depends on the depth of the depression or the height of the projection. Is maintained at about 10 times or less the diameter of the bottom surface of the opening or protrusion, and the surface properties are secured such that the side connection wiring 78 can be reliably formed at a desired position by thick film screen printing or transfer. . A large dent may be formed on the side surface. This dent, for example,
The thickness of the sealing material 82 applied between the front plate 36 and the rear plate 38 to hermetically seal them is such that the end face 46,
Because it differs between the upper surface 48 and the outer peripheral surface 44 that is recessed therefrom, it is formed on the outer peripheral surface 44 where the coating thickness is large due to a large amount of shrinkage during the heat treatment. Even in such a case, the depth of the recess formed is at most about 0.5 (mm), and is at least 10 times as large as the distance between the front plate 36 and the back plate 38 provided at least about 1 (mm) or more. By keeping it smaller, surface properties sufficient for forming the side surface connection wiring 78 are maintained.

The wirings 70, 76 and the like provided on the side surface of the FED 30 as described above are provided as follows, for example. Hereinafter, a method of forming the wirings 70 and 76 will be described with reference to FIG. 6, which schematically shows the state of the front plate 36 and the rear plate 38 at each stage of the manufacturing process. First, in the wiring forming step S1, electrode wirings 88, 90 for supplying electricity to the anode 50, the cathode electrode 58, and the like are respectively formed on the surfaces 32, 34 of the front plate 36 and the back plate 38, respectively.
A first end face wiring 70, a second end face wiring 76, an end face wiring 80 and the like are formed on the respective end faces 46 and 48, and a back wiring 74 is formed on the back surface 66 of the back plate 38. These wirings 88 and the like are formed by, for example, a thick film screen printing method or a sputtering method. In the case of the sputtering method, the processing is performed from the oblique direction with respect to the one surface 32 and the end surface 46 and the like, so that the end surface 4 as shown in FIG.
End wirings 70, 76, etc., which continue from 6, 48 to one surface 32, back surface 66, etc., can be easily formed. In the case of using the printing method, the wiring 70 and the like can be formed in the same manner by sequentially printing the thick film conductor paste thereon so as to reach the edge of the boundary between the end face 46 and the like and the one face 32 and the like. In any case, before the bonding step S4 to be described later, since the end surface wirings 70 and 76 are formed in a state where the front plate 36 and the back plate 38 are separated, the conductor film on the inner surface 32 or the back surface 66 and the end surface wiring are formed. The end face wirings 70 and 76 which are electrically connected to the conductor film on 46 or 48 can be easily formed. Then, as described above, the end surfaces 46 and 48 are connected to the inner surface 32 and the back surface 66.
Since the end surface wirings 70 and 76 are formed so as to be continuous with the inner surface 32 and the back surface 66, the electrode wiring 88 and the back surface wiring 74 are formed only up to positions near the peripheral portion thereof, respectively. Conduction can be ensured.

Next, in the electrode forming step S2, the anode 50 is formed on the inner surface 32 of the front plate, and the cathode electrode 58, the gate electrode 60, the emitter 64 and the like are formed on the inner surface 34 of the back plate. For example, any of these is formed by using a sputtering method or the like, but the details of the forming method are not necessary for understanding the present invention, and thus are omitted. The electrode forming step S2 and the wiring forming step S1 may be performed in reverse order. Further, the electrode wires 88 and 90 on the surfaces 32 and 34 are provided for the purpose of supplementing the conductivity of the anode 50 and the cathode electrode 58 and the like, and are not necessarily provided when their conductivity is sufficiently high. Good. In that case, the electrodes 50 and 58 are directly connected to the end face wiring 70 and the like. 4 and 5 described above.
Describes the case of such direct connection.

In the partition wall forming step S3, a seal spacer 92 is separately prepared, or a thick film insulating paste is applied to at least one of the inner surfaces 32, 34 of the front plate 36 and the rear plate 38 and laminated to a required height. By doing so, the outer peripheral wall 94 is formed. These correspond to the spacers 42 for preventing the sealing material 82 from entering the display area. At this time, a rib 86 for dividing the light emitting section is provided as needed. In the drawing, the outer peripheral wall 94 is provided on the front plate 36 and the rear plate 38, respectively.
Is formed, and a separate seal spacer 92 is prepared. However, this is a description of possible modes arranged side by side, and it is sufficient if at least one is provided. However, two or all of these may be used in combination.

Then, in the joining step S4, the front plate 3
6 and the back plate 38 are overlapped via a spacer 42 in a direction in which the surfaces 32 and 34 face each other.
A glass paste is applied along the outer peripheral surface of the glass paste, and a heat treatment is performed at a temperature determined according to the softening temperature of the glass paste. As a result, the front plate 36 and the rear plate 38 are air-tightly joined at a predetermined interval, and
An airtight container having substantially flat sides constituted by 6, 48 and the sealing material 82 is obtained. At this time, since the flow of the softened glass paste into the airtight container is suitably suppressed by the spacer 42, the expansion of the non-display area due to the sealing material 82 is suppressed, and the flatness of the surface is enhanced. It will be. After the joining process is completed, the inside of the airtight container is evacuated through an exhaust hole (not shown) to evacuate the inside. At this time, for example, a high vacuum can be obtained in a short time by heating the whole hermetic container to about 250 to 350 (° C.).

After forming the airtight container as described above,
In the wiring connection step S5, for example, a thick film conductor paste is applied on the sealing material 82 using a thick film screen printing method or the like and subjected to a heat treatment.
8 is formed. As a result, the first end surface wiring 70 and the second end surface wiring 76 are connected, and the anode 50 on the inner surface 32 of the front plate is connected to the back surface wiring 74, thereby extending the FED3.
0 is obtained. At this time, since the side surfaces are substantially flattened by the sealing material 82, breakage of the plurality of side surface connection wires 78 or short-circuit between adjacent ones is suitably suppressed.

In short, according to the present embodiment, the front plate 36
A plurality of first end surface wirings 70 provided on the end surface 46 of the first plate and connected to the plurality of anodes 50 provided on the inner surface 32 thereof, and connected to a drive circuit (not shown) provided on the back surface 66 of the back plate 38. And a plurality of side surface connection wires 78 provided on the sealing material 82 on the side surfaces and interconnecting the plurality of first end surface wires 70 and the back surface wires 74, respectively. The FED 30 is configured. Therefore, the anode 50 provided on the inner surface 32 of the front plate 36 is provided with the side connection wiring 78 on the sealing material 82 for joining the front plate 36 and the rear plate 38 to each other, so that the first end wiring 70 And is connected to the back wiring 74 of the back 66 of the back plate 38 via the side connection wiring 78 and further connected to the driving circuit via the back wiring 74, so that it is spatially separated from the back plate 38. The anode 50 provided on the inner surface 32 of the front plate 36 is provided with wirings 70, 78, 76 extending in a direction along the end surface 46.
Just pulled out. Therefore, it is not necessary to form the front plate 36 with a larger area than the rear plate 38 for the purpose of providing the electrode terminals on the inner surface 32. Therefore, as shown in FIG. , The non-display area formed at the boundary can be reduced.

In addition, as a result of reducing the non-display area formed at the peripheral edge of each FED 30 as described above, it is necessary to provide a sufficiently large interval between the FEDs 30 when a large-sized image display device is constituted by a plurality of FEDs. it can. for that reason,
The distance between the light emitting sections is set within one FED 30 and the adjacent F
The display quality can be further improved because the EDs 30 can easily match each other. According to the present embodiment, the directionality of the element structure, that is, the difference in the width of the non-display area on the four sides may occur as in the case of employing the structure disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 6-314066. Therefore, there is no limit on the number of sheets that can be arranged while maintaining a small non-display area.
Therefore, a large-sized image display device can be easily manufactured without increasing the display area of each FED 30 so much.

According to the present embodiment, a plurality of second end wirings 76 connected to a plurality of back wirings 74 are also provided on the end face 48 of the back plate 38, and a plurality of side connection wirings are provided. One end of the wiring 78 has a plurality of second end surface wirings 76.
Connected to the plurality of first end surface wirings 70, respectively.
And the back wiring 74 are connected to each other. Therefore, it is not necessary to directly connect the side surface connection wiring 78, which is difficult to form with high precision because it is provided on the sealing material 82 on the side surface, and the conduction between the back surface wiring 74 is not required. The desired wiring 7 can be obtained without particular consideration for securing.
The anode 50 can be easily formed so as to be connected to the anode 50.

In this embodiment, the sealing material 82 for joining the front plate 36 and the back plate 38 is made of FED.
30 is provided so that the side surface is substantially flat. Therefore, since the side surface is substantially flat, the first end surface wiring 7
Side connection wiring 78 for connecting 0 and back wiring 74
Can be easily formed with high precision. That is, after the hermetic sealing is performed by the sealing material 82, the surface roughness of the side surface is smooth enough to easily perform the thick film screen printing, and therefore, the high precision printing such as the thick film screen printing method is performed. The side surface connection wiring 78 can be formed using a technique.

While the embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be implemented in other embodiments.

For example, in the embodiment, the present invention
Although the description has been given of the case where the invention is applied to D30, a pair of flat plates is joined at a predetermined interval, and a structure is provided in which an electrode is provided on the inner surface of one of the flat plates located on the viewing side, and a plurality of plates are vertically and horizontally. The present invention can be similarly applied to other image display devices such as PDP, VFD, and LCD as long as they are tile-type image display devices used to configure a large-sized image display device by arranging the image display devices.

In the embodiment, the front plate inner surface 32
Although only the anode 50 is provided on the inner surface 32, the present invention is similarly applied to a case where two or more types of electrodes are provided on the inner surface 32.

In the embodiment, the first end face wiring 7
0 and anode 50, or second end surface wiring 76 and back surface wiring 74
Are formed separately, but they may be formed simultaneously as an integral conductor film.

In the embodiment, the second end surface wiring 76 is formed on the end surface 48 of the back plate 38, and the side surface connection wiring 78 and the back surface wiring 74 are indirectly connected via the second end surface wiring 76. However, these may be directly connected to each other by forming at least one of them up to an area beyond the ridge at the boundary between the end face 48 and the back face 66.

In the embodiment, the joining member (ie, the spacer 42 and the sealing material 82) for joining the front plate 36 and the back plate 38 also serves as a sealing material for hermetic sealing. However, the joining member does not necessarily have to double as the sealing material. For example, a sealing material is unnecessary when hermetic sealing is unnecessary, and a sealing material can be separately provided even when hermetic sealing is required.

In the embodiment, the sealing material 82 is made of frit glass. However, in a display device such as an LCD which does not require sealing with glass, a thermosetting resin which cures at a low temperature is used. Can be used.

In the embodiment, the case where the present invention is applied to the FED 30 for color display having a plurality of types of phosphor layers 52 has been described. For example, the present invention is similarly applied to an image display device for monochrome display in which the phosphor layer 52 is not provided.

Further, between the phosphor layers 52 provided on one surface 32 of the front plate 36, an insulating layer may be formed as necessary to provide a black mask.

In the embodiment, the case where the size of the front plate 36 and the size of the rear plate 38 are the same is described.
With respect to the side that will be located on the outer peripheral edge when a large display device is configured, the front plate 36 may protrude beyond the rear plate 38. Therefore, the electrode extending to such a side may adopt a structure in which the wiring to the connection terminal is directly drawn from the inner surface 32 of the front plate toward the back plate 38 side as in the conventional case.

In the embodiment, the end surfaces 46, 48
Although it has been described that a ridge is provided at the boundary between the inner surface 32 and the inner surface 32 and the back surface 66, the bending angle of the wiring at the ridge is
Due to the angle of 90 °, the end wirings 70 and 76 and the anode 5
0, when it is difficult to secure conduction with the backside wiring 74, it is preferable that the ridge is chamfered or the like so that the bending angle of the wiring is made obtuse or the wiring is continuous with a smooth curved surface.

In the embodiment, the electrodes 50, 58
Although the formation of the wirings 70, 74, etc. has been performed by sputtering, thick film screen printing, or the like, the forming method is appropriately changed according to the required film thickness, accuracy, manufacturing cost, and the like. For example, the electrodes 50 and the like may be formed by thick film printing,
The side surface connection wiring 78 can also be formed by sputtering, stamping, transfer, or the like.

Although not specifically exemplified, the present invention can be variously modified without departing from the spirit thereof.

[Brief description of the drawings]

FIG. 1 is a diagram showing a multi-screen large display device configured by disposing a plurality of tiled image display devices.

FIG. 2 is a perspective view illustrating a configuration of a main part of a conventional tile type image display device used for the large display device of FIG.

FIG. 3 is a diagram illustrating a tile image display apparatus according to an embodiment of the present invention;
FIG. 3 is a perspective view showing the configuration of the ED with a part cut away.

FIG. 4 is a diagram illustrating a configuration of the FED of FIG. 3 as viewed from the back side of a back plate.

FIG. 5 is an enlarged view showing a cross section near a side connection wiring of the FED of FIG. 3;

FIG. 6 is a diagram schematically illustrating steps of a method of manufacturing the FED in FIG. 3;

[Explanation of symbols]

 30: FED (image display element) 32: one surface (inner surface) 36: front plate (second flat plate) 38: rear plate (second flat plate) {42: spacer, 82: sealing material} (joining member) 46, 48 : End face 50: anode 66: back face 70: first end face wiring 74: back face wiring 76: second end face wiring 78: side face connection wiring

Claims (3)

[Claims] 1. A first flat plate and a second flat plate which are located at a predetermined distance from each other and are joined to each other at a peripheral portion by a predetermined joining member, and are provided on an inner surface of the first flat plate. A plurality of electrodes, and the first
A tile-type image display device for forming a large screen by arranging a plurality of plates with the side surfaces connecting the end faces of the first and second flat plates facing each other such that the flat plates are positioned on the viewing side and arranged vertically and horizontally. And a plurality of first end wirings provided on an end face of the first flat plate and connected to the plurality of electrodes, respectively, and a back surface of the second flat plate located on a side opposite to the first flat plate. And a plurality of back wirings provided on the bonding member on the side surface and interconnecting the plurality of first end wirings and the plurality of back wirings. A tile-type image display device comprising: a plurality of side connection wires. 2. The apparatus according to claim 2, further comprising a plurality of second end surface wirings provided on an end surface of the second flat plate and connected to the plurality of back surface wirings, respectively, and one end of the plurality of side surface connection wirings is formed of the plurality of side connection wires. The tile-type image display device according to claim 1, wherein the plurality of first end surface wirings and the plurality of back surface wirings are connected to each other by being connected to the second end surface wiring. 3. The tile-type image display device according to claim 1, wherein the joining member is provided such that the side surface is substantially flat.