KR20070103906A - Vacuum container for display device and electron emission display device using this vacuum container - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention provides a vacuum container for a display device and a vacuum container for simplifying the assembly process of the sealing member to increase productivity, to suppress vacuum leakage occurring at the joint, and to prevent misalignment between the first substrate and the second substrate. Provided is an electron emission display device. A vacuum container for a display device according to the present invention includes a first substrate and a second substrate disposed to face each other, and a sealing member disposed at an edge of the first substrate and the second substrate to bond the two substrates. Located on one side of the support frame having a pair of long sides and a pair of short sides and integrally formed by a molding method, one side of the support frame facing the first substrate and the other side of the support frame facing the second substrate An adhesive layer is included.

Description

Vacuum container for display device and electron emission display device using this vacuum container {VACUUM ENVELOP FOR DISPLAY DEVICE AND ELECTRON EMISSION DISPLAY DEVICE WITH THE VACUUM ENVELOP}

1 is an exploded perspective view of a vacuum container for a display device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a vacuum container for a display device according to a first exemplary embodiment of the present invention, which is taken along the line I-I of FIG. 1.

3 is an exploded perspective view of a vacuum container according to a second embodiment of the present invention.

4 is a partially exploded perspective view of a field emission array type electron emission display device according to an embodiment of the present invention.

5 is a partial cross-sectional view of a field emission array type electron emission display device according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum container for a display device, and more particularly to a vacuum container for a display device in which a sealing member for bonding a first substrate and a second substrate is improved, and an electron emission display device using the vacuum container.

In general, electron emission elements may be classified into a method using a hot cathode and a cold cathode according to the type of electron source.

Here, the electron-emitting device using the cold cathode is a field emitter array (FEA) type, a surface conduction emission type (SCE) type, a metal-insulation layer-metal Metal (MIM) type and Metal-Insulator-Semiconductor (MIS) type are known.

The electron emitting devices have different structures, electron emission principles, and the like depending on the type thereof, but basically emit electrons from the electron emitter by including an electron emitter and a driving electrode for controlling the electron emission amount of the electron emitter. .

The electron emission devices are arranged in an array on the first substrate to form an electron emission unit, and a light emitting unit including a fluorescent layer, a black layer, an anode electrode, and the like is disposed on one surface of the second substrate facing the first substrate so as to emit an electron emission unit. Together with the electron emission display device.

The first substrate and the second substrate are integrally bonded to each other by a sealing member, and then the internal space is evacuated so that the electrons can be easily discharged and moved to form a vacuum container. Spacers may be disposed in the vacuum vessel to support a compressive force applied to the vacuum vessel to maintain a constant gap between the two substrates.

As the sealing member, a combination structure of four glass bars, a filler positioned on the joining surface of two adjacent glass bars, and an adhesive layer positioned on the upper and lower surfaces of each glass bar to bond the two substrates and the glass bar are known. have. In this case, two glass bars of the four glass bars are formed to have lengths corresponding to the long side edges and the short side edges of the two substrates, respectively.

In the conventional vacuum vessel bonding process using the glass bar described above, (1) forming an adhesive layer along the edge of the substrate on the first substrate or the second substrate, and (2) filling the filler on the bonding surface between neighboring glass bars. Place the bar on the adhesive layer, ③ form an adhesive layer along the edge of the substrate on the other substrate, and then align the substrate on the glass bar, ④ melt the adhesive layer and the filler through plasticity to bond the first substrate and the second substrate Consists of steps.

As described above, since four glass bars are assembled and arranged using a filler, productivity may be reduced due to a complicated assembly process, and vacuum leakage may occur at four glass bar joints after the vacuum container is manufactured. In addition, when the glass bar is assembled, it is easy for the glass bar to deviate from the correct position, and even when one glass bar deviates from the correct position, the first substrate and the second substrate are shifted with respect to each other, thereby causing misalignment.

Therefore, the present invention is to solve the above problems, an object of the present invention is to simplify the assembly process to increase productivity, to suppress the vacuum leakage occurring in the joint, and to prevent misalignment of the first substrate and the second substrate. The present invention provides a vacuum container for a display device, and an electron emission display device using the vacuum container.

In order to achieve the above object, the present invention,

A first member and a second substrate disposed to face each other, and a sealing member disposed at an edge of the first substrate and the second substrate to bond the two substrates, wherein the sealing member includes a pair of long sides and a pair of short sides A vacuum container for a display device having a support frame which is integrally formed by the mold molding method, and an adhesive layer located on one surface of the support frame facing the first substrate and the other surface of the support frame facing the second substrate; to provide.

In addition, the present invention, in order to achieve the above object,

A first member and a second substrate disposed to face each other, and a sealing member disposed at an edge of the first substrate and the second substrate to bond the two substrates, wherein the sealing member includes a pair of long sides and a pair of short sides And a support frame formed by a mold molding method with one joint connected to the filler material, and an adhesive layer positioned on one side of the support frame facing the first substrate and the other side of the support frame facing the second substrate. Provided is a vacuum vessel for a device.

In both of the above embodiments, the support frame may be formed of any one of glass and tempered glass, and may form a corner portion where the long side portion and the short side portion are connected to each other.

In addition, the present invention, in order to achieve the above object,

The vacuum container having the above-described configuration, an electron emission unit provided on the first substrate and arranged in an array, and on the opposite surface of the second substrate to the first substrate, the fluorescent layers and the anode electrode Provided is an electron emission display device comprising a light emitting unit having a.

The electron emission device may be any one of a field emission array type, a surface conduction emission type, a metal-insulation layer-metal type, and a metal-insulation layer-semiconductor type.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are exploded perspective views and combined state sectional views of a vacuum container for a display device according to a first embodiment of the present invention, respectively, and FIG. 2 is a cross-sectional view taken along the line I-I of FIG. 1.

Referring to the drawings, the vacuum container 100 for a display device includes a first substrate 10 and a second substrate 12, and a first substrate 10 and a second substrate (arranged in parallel to each other at a predetermined interval). It consists of a sealing member 14 positioned at the edge of 12 to bond the two substrates together. The first substrate 10 and the second substrate 12 have a rectangular shape forming a pair of long side edges and a pair of short side edges, and the inside of the vacuum container 100 has a vacuum degree of approximately 10 ^-6 Torr. Keep it.

In the present embodiment, the sealing member 14 has a pair of long side portions corresponding to the long side edges of the two substrates and a pair of short side portions corresponding to the short side edges of the two substrates, and the sealing member 14 is formed by the mold (die) molding method. Layer 16 positioned on one side of the support frame 16 formed of a single body, and one side of the support frame 16 facing the first substrate 10 and the other side of the support frame 16 facing the second substrate 12. Is done.

The support frame 16 is made of glass, tempered glass, or the like, and has a configuration in which a pair of long sides and a pair of short sides are integrally connected without edges along the edges of two substrates by a molding method.

At this time, the four corner portions of the support frame 16 which is connected to the long side portion and the short side portion may be formed to have a predetermined curvature. In this case, molding of the support frame 16 at the time of mold molding can be facilitated, crack generation can be suppressed, and handling of the support frame 16 at the time of manufacturing the vacuum container 100 can be facilitated.

In the vacuum container manufacturing method of this embodiment using the sealing member 14, the adhesive layer 18 is formed on one of the first substrate 10 and the second substrate 12, and on the adhesive layer 18. The support frame 16, which is integrally formed by the mold forming method, is disposed, and (3) an adhesive layer 18 is formed on another substrate, and the substrate is aligned and arranged on the support frame 16, and ④ the adhesive layer 18 is formed by firing. Melt to bond the first substrate 10, the support frame 16 and the second substrate 12 integrally, (5) exhaust the inside of the assembly through an exhaust pipe (not shown) provided on either of the two substrates, (6) may comprise the steps of sealing the end of the exhaust pipe.

As such, the vacuum container 100 of the present embodiment having the integrated support frame 16 can omit the assembly process of the support frame 16, thereby improving productivity, and since the support frame 16 has no joints, It can fundamentally block possible vacuum leakage. In addition, since the support frame 16 is not separated from the home position, the alignment characteristics of the first substrate 10 and the second substrate 12 can be secured excellently.

3 is an exploded perspective view of a vacuum container according to a second embodiment of the present invention.

Referring to the drawings, in the present embodiment, the sealing member 14 'includes a support frame 16' formed by a mold molding method while having one joint portion connected to the filler 20, and the first substrate 10. And an adhesive layer 18 'positioned on one surface of the support frame 16' facing the other side and the other surface of the support frame 16 'facing the second substrate 12.

The joint may be located at any corner of the support frame 16 '. In this case, it is integrally formed from one long side part through one short side part and another long side part to another short side part. The position of a joint part is not limited to a corner part, The structure located in a long side part or a short side part is also possible.

In the vacuum container 100 'manufacturing method of the present embodiment using the sealing member 14', (1) forms an adhesive layer 18 'on any one of the first substrate 10 and the second substrate 12, (2) A support frame (16 ') having a seam filled with filler (20) is disposed on the adhesive layer (18'), (3) an adhesive layer (18 ') is formed on another substrate, and the substrate is placed on the support frame (16'). Aligning and (4) melting the adhesive layer 18 'and the filler 20 through firing, and bonding the first substrate 10, the support frame 16' and the second substrate 12 integrally, and ⑤ of the two substrates. Exhausting the interior of the assembly through an exhaust pipe (not shown) provided on either substrate and (6) sealing the end of the exhaust pipe.

In the present embodiment, unlike the first embodiment described above, there is one joint portion in the support frame 16 ', but the assembly process of the support frame 16' can be extremely simplified, so that productivity is improved and the number of joints is increased. By reducing the to one, vacuum leakage can be effectively suppressed. In addition, since the support frame 16 ′ does not deviate from its position, the alignment characteristics of the first substrate 10 and the second substrate 12 may be excellently secured.

The vacuum containers 100 and 100 'of the present invention using the support frames 16 and 16' produced by the molding method as described above can be effectively applied to large display devices having an effective screen portion of 30 inches or more.

The vacuum container 100, 100 ′ having the above-described configuration is provided with an electron emission unit 200 (see FIG. 2) consisting of electron emission elements on an opposite surface of the first substrate 10 to the second substrate 12. A light emitting unit 210 (refer to FIG. 2) including a fluorescent layer, an anode electrode, and the like is provided on an opposite surface of the second substrate 12 to the first substrate 10 to constitute an electron emission display device.

Electroluminescent display devices are field emission array (FEA) type, surface conduction emission (SCE) type, metal-insulating layer-metal (MIM) type, and metal-insulating layer-semiconductor (MIS) type depending on the type of electron emitting element It may be made of either. As an example of the electron emission display device using the vacuum containers 100 and 100 ', the field emission array type electron emission display device will be briefly described.

4 and 5, in the field emission array type electron emission display device, the electron emission unit 200 ′ includes cathode electrodes 24 formed along a direction orthogonal to each other with the first insulating layer 22 interposed therebetween. ) And gate electrodes 26 and electron emitters 28 formed on the cathode electrode 24.

If the cross region of the cathode electrodes 24 and the gate electrodes 26 is defined as a pixel region, electron emission portions 28 are formed in each pixel region over the cathode electrodes 24, and the first insulating layer 22 is formed. And the openings 221 and 261 corresponding to the electron emission portions 28 are formed in the gate electrodes 26 and the gate electrodes 26 to expose the electron emission portions 28 on the first substrate 10.

The electron emission unit 28 may be formed of materials emitting electrons when a electric field is applied in a vacuum, such as a carbon-based material or a nanometer (nm) size material. The electron emission unit 28 may include, for example, carbon nanotubes, graphite, graphite nanofibers, diamonds, diamond-like carbons, fullerenes (C ₆₀ ), silicon nanowires, or a combination thereof.

On the other hand, the electron emission unit may be formed of a tip structure having a pointed tip mainly made of molybdenum (Mo) or silicon (Si).

In addition, the second insulating layer 30 and the focusing electrode 32 may be positioned on the gate electrodes 26 and the first insulating layer 22. The focusing electrode 32 forms one opening 321 in each pixel region to collectively focus electrons emitted from one pixel region, or one opening corresponding to each of the electron emission units 28 forms an electron. The electrons emitted by the emitter 28 may be individually focused. 4 shows the first case.

The light emitting unit 210 'is disposed between the fluorescent layer 34, for example, red, green, and blue fluorescent layers 34R, 34G, 34B positioned at arbitrary distances from each other, and between each fluorescent layer 34. A black layer 36 is positioned to increase the contrast of the screen. The fluorescent layer 34 is disposed so that the fluorescent layers 34R, 34G, and 34B of one color correspond to each crossing region of the cathode electrode 24 and the gate electrode 26.

An anode electrode 38 formed of a metal film such as aluminum (Al) is formed on the fluorescent layer 34 and the black layer 36. The anode electrode 38 receives the high voltage required for electron beam acceleration from the outside to maintain the fluorescent layer 34 in a high potential state, and visible light emitted toward the first substrate 10 of the visible light emitted from the fluorescent layer 34. Is reflected toward the second substrate 12 to increase the brightness of the screen.

The anode electrode may be formed of a transparent conductive film such as indium tin oxide (ITO). In this case, the anode is positioned on one surface of the fluorescent layer 34 and the black layer 36 facing the second substrate 12. Moreover, the structure which forms simultaneously the above-mentioned metal film and a transparent conductive film as an anode electrode is also possible.

In addition, spacers 40 (refer to FIG. 5) are disposed between the first substrate 10 and the second substrate 12 to support the compressive force applied to the vacuum container and to keep the distance between the two substrates constant. The spacers 40 are positioned corresponding to the black layer 36 so as not to invade the fluorescent layer 34.

The field emission array type electron emission display device having the above-described configuration is driven by supplying a predetermined voltage to the cathode electrodes 24, the gate electrodes 26, the focusing electrode 32, and the anode electrode 38 from the outside.

For example, any one of the cathode electrodes 24 and the gate electrodes 26 serves as scan electrodes by receiving a scan driving voltage, and the other electrodes serve as data electrodes by receiving a data driving voltage. . The focusing electrode 32 receives a voltage required for electron beam focusing, for example, 0 V or a negative DC voltage of several to several tens of volts, and the anode electrode 38 requires a voltage for accelerating the electron beam, for example, several hundred to several thousand volts. DC voltage of is applied.

Then, in the pixels where the voltage difference between the cathode electrode 24 and the gate electrode 26 is greater than or equal to the threshold, an electric field is formed around the electron emission part 28 to emit electrons therefrom. The emitted electrons are focused through the opening 321 of the focusing electrode 32 to the center of the electron beam bundle, and are attracted by the high voltage applied to the anode electrode 38 to impinge on the fluorescent layer 34 of the corresponding pixel to emit light. Let's do it.

Since the electron emission display device of the present embodiment includes the vacuum containers 100 and 100 'of the first or second embodiment described above, the assembly process of the support frames 16 and 16' can be omitted or extremely simplified, thereby improving productivity. Height, effectively prevent vacuum leakage, and maintain the correct alignment without first and second substrates 10 and 12 being misaligned with each other.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the range of.

As described above, the vacuum container for a display device according to the present invention can greatly simplify the assembly process of the support frame, and can effectively suppress the vacuum leakage that may occur at the joint portion. Therefore, the electron emission display device of the present invention using the vacuum container can maintain the high vacuum degree and ensure excellent alignment characteristics of the first substrate and the second substrate, thereby improving the display quality of the screen.

Claims (9)

A first substrate and a second substrate disposed to face each other; A sealing member disposed at an edge of the first substrate and the second substrate to bond the two substrates; The sealing member, A support frame having a pair of long sides and a pair of short sides, the support frame integrally formed by a molding method; And An adhesive layer positioned on one surface of the support frame facing the first substrate and the other surface of the support frame facing the second substrate Vacuum container for a display device comprising a. The method of claim 1, And the support frame is formed of any one of glass and tempered glass. The method of claim 1, The support container is a vacuum container for a display device to form a corner portion that is connected to the long side portion and the short side curvature. A first substrate and a second substrate disposed to face each other; A sealing member disposed at an edge of the first substrate and the second substrate to bond the two substrates; The sealing member, A support frame having a pair of long sides, a pair of short sides, and a joint connected to a filler and formed by a mold molding method; And An adhesive layer positioned on one surface of the support frame facing the first substrate and the other surface of the support frame facing the second substrate Vacuum container for a display device comprising a. The method of claim 4, wherein And the support frame is formed of any one of glass and tempered glass. The method of claim 4, wherein The support container is a vacuum container for a display device to form a corner portion that is connected to the long side portion and the short side curvature. The vacuum container of any one of Claims 1-6; An electron emission unit provided on the first substrate and having a plurality of electron emission elements arranged in an array; And A light emitting unit provided on an opposite surface of the second substrate to the first substrate and including fluorescent layers and an anode electrode; Electron emission display device comprising a. The method of claim 7, wherein And the electron emission element is any one of a field emission array type, a surface conduction emission type, a metal-insulation layer-metal type, and a metal-insulation layer-semiconductor type. The method of claim 7, wherein And an electron emission display device having an effective screen portion of 30 inches or more.

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