KR20060095717A - Field emission device - Google Patents

Abstract

The present invention discloses an electron-emitting device capable of dividing a grid electrode into a plurality of sub-grid electrodes to prevent deformation and misalignment of the grid electrode.

The electron emitting device of the present invention comprises: an anode plate having an anode electrode and a phosphor arranged on an inner surface thereof; The anode plate is arranged to face each other at a predetermined interval, and a gate electrode having a cathode electrode, an electron emission source and a gate hole corresponding to the electron emission source is arranged on an inner surface of the anode plate opposite to the inner surface of the anode plate. A cathode plate; A spacer for maintaining a predetermined distance between the anode plate and the cathode plate; Arranged between the anode plate and the cathode plate, divided into a plurality of grid electrodes, each sub-grid electrode has a grid electrode having an electronic control hole corresponding to the gate hole of the gate electrode. The plurality of sub-grid electrodes constituting the grid electrode are arranged in a matrix form or have a stripe shape arranged in the longitudinal direction of the cathode electrode or a stripe shape arranged in a direction crossing the longitudinal direction of the cathode electrode.

Description

Electron Emission Device {Field emission device}

1 is a cross-sectional view of an electron emitting device having a conventional grid electrode;

2 is a partial perspective view of a conventional electron-emitting device,

3 is a cross-sectional view of an electron-emitting device according to an embodiment of the present invention;

4 is a partial perspective view of an electron-emitting device according to an embodiment of the present invention;

5A to 5C are plan views showing an example of a grid electrode in the electron emitting device according to the embodiment of the present invention;

6A to 6C are plan views showing other examples of grid electrodes in the electron-emitting device according to the embodiment of the present invention;

7 is a partial perspective view illustrating a coupling relationship between a spacer and a grid electrode in the electron emitting device according to the embodiment of the present invention;

Explanation of symbols on the main parts of the drawings

210, 220: substrate 220: cathode

225: electron emission sources 250, 251, 254, 257: grid electrodes

260: anode electrode 270: phosphor

280: spacer

The present invention relates to an electron emitting device, and more particularly, to an electron emitting device in which a grid electrode is divided into a plurality of sub grid electrodes.

Typically, the electron-emitting device includes a front substrate and a rear substrate facing each other, the anode and the phosphor are formed on the inner surface of the front substrate, the cathode, the gate and the electron emission source is formed on the inner surface of the back substrate. The rear substrate and the front substrate are sealed to maintain a cell gap of a predetermined interval by spacers so as to maintain a vacuum between the two substrates.

The electrons are emitted from the electron emission source by the voltage difference applied to the cathode and the gate, and the emitted electrons are accelerated toward the anode to which a high voltage is applied, and these accelerated electrons collide with the phosphor to excite the phosphor to generate a predetermined light. Let it fire.

In the electron emitting device, while the electrons are emitted from the electron emitting source, arcing occurs in the inner space between the two substrates while instantaneous gas is ionized by the outgassing generated inside the panel. there was. The arc causes an electrical short circuit between the anode and the gate, which causes a high voltage on the gate and damages the gate oxide and the resistive layer. Such an arc becomes more severe as the voltage applied to the anode increases, and in a structure in which the cathode and the anode are coupled by a spacer, it is difficult to obtain a high luminance electron emitting device that operates stably at a high voltage.

In order to solve this problem, an electron emitting device having a grid electrode for preventing an arc has been disclosed. 2 shows a cross-sectional view of an electron emitting device having a conventional grid electrode, and FIG. 3 shows a partial perspective view of the electron emitting device having a conventional grid electrode.

2 and 3, the conventional electron emission device 100 includes a front substrate 215 including an anode electrode 160 and a phosphor layer 170, a cathode electrode 220, and a gate electrode 240. It is provided with a back substrate 210 having a. The gate 240 includes a gate hole 245 corresponding to the through hole 235 of the insulating layer 230.

The front substrate 215 and the rear substrate 210 are supported by the spacer 280, and between the front substrate 215 and the rear substrate 210, a grid electrode for controlling electrons from the electron emission source 225 ( 250) is arranged. The grid electrode 250 has a metal mesh shape having an electronic control hole 255 corresponding to the gate hole 245 of the gate 240.

The conventional electron-emitting device 100 prevents arc generation by reducing the electric field applied to the edge of the gate even when a high voltage is applied to the anode electrode by a grid electrode arranged between the gate electrode 240 and the anode electrode 260. In addition, since the ions are collected in the metal mesh of the grid electrode 250 and exit to the external ground before the arc is damaged, the mechanical damage caused by the arc and the electrical damage of part of the anode voltage applied to the cathode are prevented. do.

Conventional electron-emitting device 100 was able to prevent the generation of the arc according to the formation of the grid electrode 250, but since the grid electrode 250 has a single plate-like shape when applied to large display devices in the thermal process Deformation of the grid electrode 250 is caused.

Looking at the manufacturing method of the conventional electron-emitting device, the anode electrode and the grid electrode formed on the front substrate was aligned and the phosphor firing process was performed. Therefore, the difference in the coefficient of thermal expansion between the grid electrode made of metal and the front substrate made of glass is generally generated. Therefore, due to the heat generated during the thermal process or element driving such as phosphor layer firing process, sealing process and exhaust process, This results in deformation of the metal mesh of the grid electrode, and deformation of the grid electrode causes misalignment with other electrodes such as the anode electrode. Due to the deformation and misalignment of the metal mesh, there is a problem that the screen is not uniform and the image quality is deteriorated.

In order to prevent deformation of the grid electrode of the metal mesh type, Korean Patent Publication No. 2004-0057376 has a mesh grid interposed between the cathode plate and the anode plate, the mesh grid is arranged apart from the anode plate and the cathode plate Disclosed is a field emission device that is tightly held by a spacer. In addition, Korean Patent Laid-Open Publication No. 2004-0061657 includes a mesh grid supported by a spacer between a cathode plate and an anode plate, and forms an insulating layer as a protective film on the upper and lower surfaces of the mesh grid to form a phosphor firing process. Field emission devices have been disclosed to prevent deformation of the mesh grid and misalignment with other electrodes in a thermal process.

The present invention is to solve the problems of the prior art as described above, by dividing the grid electrode into a plurality of sub-grid electrodes, the deformation of the grid electrode according to the thermal expansion difference of the metal mesh and the miss between the grid electrode and other electrodes An object of the present invention is to provide an electron emitting device capable of preventing alignment and an electron emitting display device employing the same.

In order to achieve the above object, the present invention includes an anode plate and an anode electrode and a phosphor arranged on the inner surface; The anode plate is arranged to face each other at a predetermined interval, and a gate electrode having a cathode electrode, an electron emission source and a gate hole corresponding to the electron emission source is arranged on an inner surface of the anode plate opposite to the inner surface of the anode plate. A cathode plate; A spacer for maintaining a predetermined distance between the anode plate and the cathode plate; Arranged between the anode plate and the cathode plate, divided into a plurality of grid electrodes, each sub-grid electrode provides an electron emitting device having a grid electrode having an electronic control hole corresponding to the gate hole of the gate electrode Characterized in that.

An insulating layer is arranged below the grid electrode, and the insulating layer is bonded to the gate by frit to fix the grid electrode to the cathode plate.

An insulating layer is arranged below the grid electrode, and the grid electrode is in close contact with the cathode plate by a spacer.

A plurality of sub grid electrodes constituting the grid electrode are arranged in a matrix form. The plurality of sub-grid electrodes constituting the grid electrode have a stripe shape arranged in the longitudinal direction of the cathode electrode or a stripe shape arranged in a direction crossing the longitudinal direction of the cathode electrode.

The plurality of sub grid electrodes constituting the grid electrode further include a plurality of insertion holes into which spacers are to be inserted.

The insertion holes formed in each of the sub-grid electrodes of the grid electrode are arranged in a direction crossing the longitudinal direction of the cathode electrode and the longitudinal direction of the cathode electrode, or in a direction crossing the longitudinal direction of the cathode electrode or the longitudinal direction of the cathode electrode. Are arranged in one direction.

The spacer includes a first portion extending in one direction and a plurality of second portions extending vertically from the first portion, and the insertion hole of the sub grid electrode is inserted into the second portion of the spacer.

The first portion of the spacer extends in the longitudinal direction of the cathode electrode, and insertion holes of neighboring sub-grid electrodes arranged in the longitudinal direction of the cathode of the plurality of sub-grid electrodes are inserted into the second portion.

The first portion of the spacer extends in a direction crossing the longitudinal direction of the cathode electrode, and the insertion holes of the neighboring sub-grid electrodes arranged in the direction crossing the longitudinal direction of the cathode of the plurality of sub-grid electrodes are arranged in the second direction. Is inserted into the part.

The first portion of the spacer extends in a direction crossing the longitudinal direction of the cathode electrode or the longitudinal direction of the cathode electrode, and the insertion hole of each sub grid electrode is inserted into the second portion.

The grid electrode is arranged away from the front substrate and the rear substrate, the spacer penetrates through the insertion hole of each sub-grid electrode.

Electronic control holes formed in each sub grid electrode constituting the grid electrode are arranged correspondingly between the cathode electrode and the phosphor layer.

The grid electrode includes one selected from the group consisting of sus (SUS), invar steel, and an iron-nickel alloy.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

3 is a sectional view of an electron-emitting device according to an embodiment of the present invention.

Referring to FIG. 3, an electron-emitting device 200 according to an embodiment of the present invention is arranged between an anode plate and a cathode plate, and an anode plate and a cathode plate to maintain a space between the anode plate and the cathode plate 280. ). At this time, the anode plate and the cathode plate space maintained by the spacer 280 maintain a vacuum state.

The anode plate includes an anode electrode 260 and a phosphor layer 270 arranged on the front substrate 215 and the front substrate 215. The cathode plate includes a back substrate 210, a cathode electrode 220, an electron emission source 225, and a gate electrode 240.

Since the front substrate 215 is located on an optical path through which light generated in the phosphor layer 270 passes by the collision with the accelerated electrons, the front substrate 215 preferably includes a transparent substrate, for example, a glass substrate or a plastic. Substrate and the like. On the other hand, since the back substrate 210 is not positioned on the optical path through which the light generated from the phosphor layer 270 passes, the back substrate 210 includes a transparent substrate or an opaque substrate, for example, a glass substrate, a plastic substrate, or a metal substrate. It includes.

A stripe cathode electrode 220 extending in a first direction is formed on an inner surface of the back substrate 210, that is, a surface opposite to the front substrate 215. Since the cathode electrode 220 is not disposed on the optical path, the cathode electrode 220 includes a metal material, and preferably includes Cr, Nb, Mo, W, Al, Ag, Cu, or the like. An insulating layer 230 having a plurality of through holes 235 is formed on the cathode electrode 220. The insulating layer 230 includes, for example, a silicon oxide film or a silicon nitride film.

The electron emission source 225 exposed by the hole 235 formed in the insulating layer 230 is formed on the cathode electrode 220. The electron emission source 225 includes a spindt-type metal tip or silicon tip having a sharp tip to concentrate an electric field, or the electron emission source 225 may be graphite, diamond, diamond-like carbon or carbon. Carbon-based materials such as nanotubes, and nano-size materials such as nanotubes, nanowires, nanofibers, and the like.

Meanwhile, when the through hole 235 and the electron emission source 225 are formed by a photolithography method using a back exposure process, the cathode electrode 220 may include a transparent conductive material such as ITO. It may be. In the case where the through hole 235 and the electron emission source 225 are formed using a white exposure process, the insulating layer 230 may include, for example, a film having a dark red color due to firing of polyimide. In this case, the insulating layer 230 may serve as a mask pattern during the exposure process.

A stripe gate electrode 240 is formed on the insulating layer 230 and extends in a second direction, which is a direction crossing the first direction. In other words, the gate electrode 240 has a stripe shape that crosses the cathode electrode 220. The gate electrode 240 includes a gate hole 245 corresponding to the through hole 235 of the insulating layer 230.

The gate electrode 240 forms a predetermined electric field in the electron emission source 225 exposed by the through hole 235 together with the cathode electrode 220 to emit electrons from the electron emission source 225. For example, it is preferable to include a conductive metal material such as Cu, Ag or Cr.

In an embodiment of the present invention, one electron emission source 225 is arranged with respect to one phosphor layer 270, and one gate hole 245 of the gate electrode 240 with respect to the electron emission source 225. The corresponding arrangement is not limited thereto, but a plurality of electron emission sources 225 and corresponding gate holes 245 may be arranged with respect to one phosphor layer 270.

An anode electrode 260 is formed on the inner surface of the front substrate 215 of the anode plate, that is, the surface opposite to the back substrate 210, and the phosphor layer 270 is formed on the anode electrode 260. Since the anode electrode 260 is positioned on an optical path through which light generated from the phosphor layer 270 passes, it is preferable to include a transparent electrode such as ITO.

The anode electrode 260 has a stripe shape like the cathode electrode 220, where the anode electrode 260 has a stripe shape extending in a second direction to cross the cathode electrode 220.

In the exemplary embodiment of the present invention, the anode electrode 260 formed on the anode plate is illustrated to have a stripe shape, but is not necessarily limited thereto and may have various structures such as a front integral electrode shape or a split electrode shape.

Although the electron emission device 200 of the present invention illustrates that the anode plate includes a front substrate 215, a transparent electrode 260 and a phosphor layer 270 arranged on the front substrate, the anode plate includes a front substrate and a front surface. It is also possible to have a structure including a transparent electrode arranged on a substrate, a phosphor layer and a metal thin film, or a structure including a front substrate, a metal thin film and a phosphor layer arranged on the front substrate.

The phosphor layer 270 may include phosphors of a predetermined color, for example, R, G, and B colors. One electron emission source 225 and a gate hole 245 of the gate electrode 240 are arranged for each phosphor layer 270, or a gate hole of the plurality of electron emission sources 225 and the gate electrode 240 is formed. 245 may be arranged.

In the exemplary embodiment of the present invention, the phosphor layer 270 is formed on the anode 260 to have a stripe shape. However, the present invention is not limited thereto and may have a dot type shape. Although not shown in the drawings, a black layer may be arranged between the phosphors formed on the anode electrode to block external light absorption and prevent optical crosstalk. By arranging the black layers between the phosphor layers, a sharp image may be realized by increasing the contrast ratio of the display device.

In addition, the electron-emitting device 200 of the present invention is a grid electrode for controlling the electrons emitted from the electron emission source 225 between the anode plate and the cathode plate, that is, between the anode electrode 260 and the gate electrode 240 250 is further provided. The grid electrode 250 includes a plurality of electronic control holes 252 corresponding to the gate holes 245 of the gate electrode 240.

In the grid electrode 250, an insulating layer 295 is arranged under the grid electrode 250. The insulating layer 295 includes SiO 2 or the like. Since the insulating layer 295 is bonded to the top surface of the gate electrode 240 by the frit 290, the grid electrode 250 is fixed to the cathode plate.

Meanwhile, in addition to the method of fixing the insulating layer 295 arranged below the grid electrode 250 with the frit 290 to fix the grid electrode 250 to the cathode plate, a conventional method on the front substrate 215. By attaching the spacer 280, the grid electrode 250 having the insulating layer 295 arranged thereon and the anode plate are aligned, and then sealing the anode plate and the cathode plate, so that the grid electrode 250 is separated from the anode plate. It may be supported by the spacer 280 in a separated state to be in close contact with the cathode plate.

In the exemplary embodiment of the present invention, as shown in FIG. 4, the insulating layer 295 arranged under the grid electrode 250 has a stripe shape corresponding to the plurality of electronic control holes 255 of the grid electrode 250. Although illustrated as having an opening 296, the present invention is not limited thereto, and openings corresponding to the electron air holes 252 of the grid electrode 250 may be provided.

In the exemplary embodiment of the present invention, the grid electrode 250 is fixed on the rear substrate of the cathode plate. However, the grid electrode 250 is not necessarily limited thereto and may be fixed to the front substrate 215 of the anode plate. In addition, by forming a hole through which the spacer can penetrate the grid electrode 250 to fix the grid electrode by the spacer may be arranged spaced apart from the anode plate and the cathode plate.

The grid electrode 250 has a metal mesh shape and includes stainless steel (SUS) or invar steel. Invar steel has a much smaller thermal expansion coefficient than general stainless steel, so that thermal stress generated in a subsequent firing process can be reduced, which is more advantageous for manufacturing a large display device. In addition, the grid electrode can be made of an alloy of iron-nickel, because the iron-nickel alloy has a very small coefficient of thermal expansion compared to the general stainless material, it is possible to reduce the thermal stress generated in the subsequent firing process.

As shown in FIG. 4, the grid electrode 250 is divided into a plurality of sub grid electrodes 251, and each of the sub grid electrodes 251 is used to control electrons emitted from the electron emission source 225. An electronic control hole 252 is provided.

5A to 5C illustrate a plan view showing an example of a grid electrode in the electron emission device according to the embodiment of the present invention.

Referring to FIG. 5A, the grid electrode 250 includes a plurality of sub grid electrodes 251, and the plurality of sub grid electrodes 251 have a first direction parallel to the cathode electrode 220 and the cathode electrode 220. It has a matrix form arranged in a second direction intersecting with).

Each sub grid electrode 251 has a metal mesh shape and includes a plurality of electronic control holes 252. Each of the electronic control holes 252 is arranged corresponding to the intersection of the anode electrode 260 and the cathode electrode 220, and corresponds to one phosphor layer among the plurality of R, G, and B phosphor layers 270. Are arranged.

5B and 5C, the grid electrode 250 includes a plurality of sub grid electrodes 254 and 257, and the plurality of sub grid electrodes 254 and 257 are each a cathode electrode 220. And a line shape arranged in a first direction parallel to the second electrode and a line shape arranged in a second direction crossing the cathode electrode 220.

Each of the sub grid electrodes 254 and 257 has a metal mesh shape and includes a plurality of electronic control holes 255 and 258, respectively. The electronic control holes 255 and 258 are arranged to correspond to the intersection of the anode electrode 260 and the cathode electrode 260, and correspond to one phosphor of the plurality of R, G, and B phosphor layers 270. Correspondingly arranged.

The sub-grid electrode 251 which attaches the spacer 280 to the front substrate 215 having the anode electrode 260 and the phosphor layer 270 in a conventional manner and constitutes the anode plate and the grid electrode 250. , (254) and (257) are aligned, and then the anode plate and the cathode plate are sealed. Therefore, the grid electrode 250 is supported by the spacer 280 in the state away from the anode plate to be in close contact with the cathode plate.

6A to 6C are plan views illustrating another example of the grid electrode in the electron-emitting device according to the embodiment of the present invention.

6A through 6C, the grid electrode 250 includes a plurality of sub grid electrodes 251, 254, and 257, respectively. As illustrated in FIG. 6A, the plurality of sub-grid electrodes 251 may have a matrix form arranged in a first direction parallel to the cathode electrode 220 and in a second direction crossing the cathode electrode 220.

In addition, the plurality of sub grid electrodes 254 and 257 may each have a line shape arranged in a first direction parallel to the cathode electrode 220 and the cathode electrode 220 as shown in FIGS. 6B and 6C. It has a line form arranged in the crossing second direction.

Each of the sub grid electrodes 251, 254, and 257 has a metal mesh shape and an insertion hole for coupling the plurality of electronic control holes 252, 255, and 258 to the spacer 280. 253, 256, and 259 are provided.

The electronic control holes 252, 255, and 258 of the sub-grid electrodes 251, 254, and 257 are arranged corresponding to the intersections of the anode electrode 260 and the cathode electrode 220, respectively. And corresponding to one phosphor layer among the plurality of R, G, and B phosphor layers 270.

Meanwhile, the insertion holes 253, 256, and 259 are arranged in the longitudinal direction of the cathode electrode 220 or in the direction crossing the cathode electrode 220, but are not necessarily limited thereto. The insertion holes at 251, 254, and 257 may be arranged in the direction crossing the length direction of the cathode electrode 220 and the length direction of the cathode electrode 220, respectively.

The insertion holes 253, 256, and 259 of the sub-grid electrodes 251, 254, and 257 are preferably formed at portions not corresponding to the light emitting regions of the back substrate 210. For example, the insertion holes 253, 256, and 259 may be formed in portions not corresponding to the gate holes 245 of the gate electrode 240.

In the exemplary embodiment of the present invention, the grid electrode 250 is illustrated as having a plurality of sub grid electrodes 251, 254, and 257 having a mesh shape or a line shape, but is not necessarily limited thereto. In order to prevent deformation of the grid electrode due to the difference in the coefficient of thermal expansion, it is possible to divide the sub-grid electrode having various shapes.

In addition, although the opening of the grid electrode has a rectangular structure in the embodiment of the present invention, any structure that efficiently accelerates electrons emitted from the electron emission source and passed through the gate hole to the anode is possible. For example, it may have a variety of forms such as circular, square or hexagon.

In the electron-emitting device of the present invention, the number or size of the sub-grid electrodes is determined according to the size of the panel and the grid electrode material.

FIG. 7 illustrates a coupling relationship between a grid electrode and a spacer in the electron emission device according to the exemplary embodiment of the present invention. FIG. 7 illustrates the anode plate in an inverted state, and is applied when the plurality of sub grid electrodes constituting the grid electrode have insertion holes as shown in FIGS. 6A to 6C.

Referring to FIG. 7, an anode electrode 260 is arranged in a stripe shape on the front substrate 215, a phosphor layer 270 is arranged on the anode electrode 260, and electronic control of the sub grid electrode 251 is performed. The holes 252 are arranged corresponding to the phosphor layers 270.

The spacer 280 includes a first portion 280a extending in the longitudinal direction of the anode electrode 260 and a second portion 280b projecting in a direction perpendicular to the first portion, and protruding from the second portion ( 280b is inserted into the insertion hole 252 of the sub grid electrode 251. The anode plate and the cathode plate are kept in contact with the second portion 280b of the spacer 280.

In the grid electrode 250 of the present invention, the second portion 280b of the spacer 280 is inserted into and fixed to the insertion hole 252 of the sub-grid electrode adjacent to the longitudinal direction of the anode of the plurality of grid electrodes 251. However, the insertion hole 252 is arranged in the sub-grid electrode 251 in the longitudinal direction of the cathode electrode 220, so that the sub-grid electrodes adjacent in the longitudinal direction of the cathode of the plurality of grid electrodes 251 are arranged. The second portion 280b of the spacer 280 may be inserted into the insertion hole 252 to be fixed. In addition, the sub grid electrodes 251 may be separately fitted and fixed to the second portions of the respective spacers.

In the exemplary embodiment of the present invention, the spacer is bonded to the anode plate by a paste or the like, or the insertion hole is formed in the grid electrode to be bonded to the spacer. However, the gate 240 and the cathode electrode 220 are not necessarily limited thereto. A groove may be formed in the insulating layer 230 arranged therebetween to support the spacer.

As described above, when the electron emission device 200 provides a predetermined voltage to the gate electrode 240 and the cathode electrode 220, the electron emission device 200 may be disposed between the gate electrode 240 and the cathode electrode 220 from the selected electron emission source 225. The electrons are emitted by the voltage difference. At this time, electrons are emitted from the electron emission source 225 through the gate hole 245 of the gate electrode 240. The emitted electrons are accelerated by the grid electrode 250 and are directed to the anode electrode 260 through the electronic control hole 252. The accelerated electrons collide with the phosphor layer 270 by a high voltage applied to the anode electrode 260 to generate predetermined light.

The electron-emitting device of the present invention is not limited to the structure shown in the drawings, but employs a grid electrode and is applicable to a structure in which the grid electrode is divided into a plurality of sub-grid electrodes. In addition, the method of fixing the grid electrode is not limited to the method proposed in the present invention, and various methods of fixing the sub grid electrode to the anode plate or the cathode plate may be applied.

According to the embodiment of the present invention as described above, the following effects can be obtained.

First, by dividing the grid electrode into a plurality of sub-grid electrodes, it is possible to prevent the deformation of the grid electrode due to the difference in the coefficient of thermal expansion with the substrate due to the heat generated in the panel during the thermal process or device driving, such as the firing process.

Second, by dividing the grid electrode into a plurality of sub-grid electrodes to prevent deformation of the grid electrode, it is possible to prevent the misalignment with other electrodes due to the deformation of the grid electrode.

Third, as the deformation and misalignment of the grid electrode are prevented, the screen becomes uniform, which has the advantage of improving image quality.

Fourth, the grid electrode is divided into a plurality of sub-grid electrodes to prevent deformation of the grid electrodes, which is advantageous for the display device of the large screen.

Fifth, by arranging the grid electrodes divided into a plurality of sub-grid electrodes between the anode plate and the cathode plate, to prevent damage by arc and improve the acceleration performance of electrons emitted from the electron emission source, high brightness, high resolution electronic room You can get an exitee.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

Claims (14)

An anode plate on which an anode electrode and a phosphor are arranged; The anode plate is arranged to face each other at a predetermined interval, and a gate electrode having a cathode electrode, an electron emission source, and a gate hole corresponding to the electron emission source is arranged on an inner surface of the anode plate opposite to the inner surface of the anode plate. A cathode plate; A spacer for maintaining a predetermined distance between the anode plate and the cathode plate; The electrons are arranged between the anode plate and the cathode plate, and divided into a plurality of grid electrodes, each sub grid electrode having a grid electrode having an electronic control hole corresponding to the gate hole of the gate electrode. Emitting element. The method of claim 1, And an insulating layer is arranged under the grid electrode, and the insulating layer is bonded to the gate by frit to fix the grid electrode to the cathode plate. The method of claim 1, An insulating layer is arranged below the grid electrode, and the grid electrode is in close contact with the cathode plate by a spacer. The method of claim 1, And the plurality of sub-grid electrodes constituting the grid electrode are arranged in a matrix form. The method of claim 1, The plurality of sub-grid electrodes constituting the grid electrode may have a stripe shape arranged in the longitudinal direction of the cathode electrode, or have an stripe shape arranged in a direction crossing the longitudinal direction of the cathode electrode. . The method of claim 1, The plurality of sub-grid electrodes constituting the grid electrode further comprises a plurality of insertion holes into which the spacer is to be inserted. The method of claim 6, The insertion holes formed in each of the sub-grid electrodes of the grid electrode are arranged in a direction crossing the longitudinal direction of the cathode electrode and the longitudinal direction of the cathode electrode, or in a direction crossing the longitudinal direction of the cathode electrode or the longitudinal direction of the cathode electrode. Electron-emitting device, characterized in that arranged in one direction. The method of claim 7, wherein The spacer has a first portion extending in one direction and a plurality of second portions extending vertically from the first portion, wherein the insertion hole of the sub grid electrode is inserted into the second portion of the spacer. Electron-emitting device. The method of claim 8, The first portion of the spacer is formed extending in the longitudinal direction of the cathode electrode, the insertion hole of the neighboring sub-grid electrode arranged in the longitudinal direction of the cathode of the plurality of sub-grid electrode is inserted into the second portion Electron-emitting device. The neighboring sub-grid electrode of claim 8, wherein the first portion of the spacer extends in a direction crossing the length direction of the cathode electrode and is arranged in a direction crossing the length direction of the cathode electrode among the plurality of sub-grid electrodes. An electron-emitting device, characterized in that the insertion hole is inserted into the second portion. The method of claim 8, wherein the first portion of the spacer extends in a direction crossing the longitudinal direction of the cathode electrode or the longitudinal direction of the cathode electrode, the insertion hole of each sub-grid electrode is inserted into the second portion of the spacer Electron-emitting device, characterized in that. The electron emitting device of claim 6, wherein the grid electrodes are arranged apart from the front substrate and the rear substrate, and the spacers penetrate through the insertion holes of the respective sub grid electrodes. The electron emission device according to claim 1, wherein the electron control holes formed in each sub grid electrode constituting the grid electrode are arranged correspondingly between the cathode electrode and the phosphor layer. The electron emitting device of claim 1, wherein the grid electrode comprises one selected from the group consisting of sus (SUS), invar steel, and iron-nickel alloys.

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