KR20070074415A - Electron emission display device for preventing arch - Google Patents

Abstract

An electron emission display device is provided to prevent damage of a panel or a driving circuit unit by suppressing the generation of arcing between an anode electrode and a chassis. A panel(100) includes an upper substrate(110) and a lower substrate(120) in order to generate light when electrons collide with the upper substrate. The upper substrate includes anode electrodes(130). The lower substrate is used for generating the electrons. A chassis is attached to the lower substrate. One side of the chassis is formed of a nonconductor. A driving circuit unit(300) is attached to the chassis in order to drive the panel.

Description

Electromagnetic Emission Display Device for Preventing Arching

1 is a structural diagram showing a structure of an electron emission display device according to the prior art.

2 is a structural diagram showing a structure of an electron emission display device according to the present invention.

3 is a side view of the electron emission display device shown in FIG. 2 seen from the A direction.

*** Explanation of symbols on main parts of drawings ***

100: panel 110: upper substrate

120: lower substrate 130: anode electrode

140: spacer 200a: conductor portion

200b: non-conductor portion 300: drive circuit portion

The present invention relates to an electron emission display device that prevents arcing. More specifically, the present invention relates to an electron emission display device that prevents arcing that prevents damage to the panel and the driving circuit by arcing generated between the anode electrode and the chassis. It is about.

BACKGROUND ART A thin, lightweight flat panel display is used as a display device of a portable information terminal such as a personal computer, a cellular phone, a PDA, or a monitor of various information devices. Such flat panel displays include LCDs using liquid crystal panels, organic light emitting displays using organic light emitting diodes, PDPs using plasma panels, electron emitting display devices using electron emitting devices, and the like.

The flat panel display can be classified into a memory driving method and a non-memory driving method in terms of structurally divided into an active matrix and a passive matrix, and a light emission principle. In general, the active matrix method has meaning with the memory driving method, and the passive matrix method has meaning with the non-memory driving method. The active matrix method and the memory driving method emit light at a period of a frame unit. The passive matrix method and the non-memory driving method emit a light at a period of a line unit.

As for the medium- and large-sized flat panel displays that are currently commercialized, TFT-LCD (Thin Film Transistor Liquid Crystal Display) is an active matrix method, and OLED, which is being developed as a new display device, is also an active method. On the other hand, as a new display device, an electron emission display device is a passive matrix method, and unlike other flat panel devices, a non-memory driving method selects horizontal lines sequentially and emits light only when a selected one of the horizontal lines is selected. Apply the scan method. That is, the driving method has a constant duty ratio.

In general, an electron emission device has a method using a hot cathode and a cold cathode as an electron source. The electron-emitting devices using the cold cathode are Field Emitter Array (FEA), Surface Conduction Emitter (SCE), Metal-Insulator-Metal (MIM), Metal-Insulator-Semiconductor (MIS), and BSE (Ballistic). electron surface emitting) and the like are known.

The FEA type electron emitting device uses a low work function or high β function as an electron emission source, and uses electrons to emit electrons by electric field in vacuum. In addition, devices using electron emission sources for nanomaterials have been developed.

The SCE type electron emission device is a device in which an electron emission part is formed by providing a conductive thin film between two electrodes disposed to face each other on a substrate and providing a micro crack in the conductive thin film. The device utilizes a principle that electrons are emitted from the electron emission portion, which is the fine gap, by applying a voltage to an electrode to flow a current to the surface of the conductive thin film.

The MIM type and MIS type electron emission devices each form an electron emission portion composed of a metal-dielectric layer-metal (MIM) and a metal-dielectric layer-semiconductor structure, and apply a voltage between two metals or a metal and a semiconductor disposed between dielectric layers. It is a device using the principle that electrons are released as they move and accelerate from a metal having a high electron potential or from a semiconductor to a metal having a low electron potential when applied.

The BSE type electron emitting device forms an electron supply layer made of a metal or a semiconductor on an ohmic electrode by using the principle that electrons travel without scattering when the size of the semiconductor is reduced to a dimension area smaller than the average free stroke of electrons in the semiconductor. And an insulating layer and a metal thin film formed on the electron supply layer to emit electrons by applying power to the ohmic electrode and the metal thin film.

Like the CRT (Cathode-Ray Tube), the electron-emitting device operates by cathode electrode ray emission (self-light source, high efficiency, high luminance and wide luminance region, natural color and high color purity, wide viewing angle), operating speed, Due to the advantage of lighting that the operating temperature range is wide, it can be used in various fields, and active research has been made until recently.

1 is a structural diagram showing a structure of an electron emission display device according to the prior art. Referring to FIG. 1, the electron emission display device includes a panel 1, a driving circuit unit 30, and a chassis 20.

The panel 1 is divided into a lower substrate 11 that emits electrons and an upper substrate 10 that generates light by colliding with the electrons emitted from the lower substrate 11. The upper substrate 10 allows electrons to be accelerated. The anode electrode 12 is formed. A high voltage of several kV is applied to the anode electrode 12.

The driving circuit unit 30 transmits the data signal and the scan signal to the panel 1 so that the panel 1 displays an image by the data signal and the scan signal. The driving circuit unit 30 transmits a data driver circuit for generating and transmitting a data signal, a scan driver circuit for generating and transmitting a scan signal, an image signal for generating a control signal and a data signal to the data driver circuit and the scan driver circuit. And a timing control unit for controlling the data driver circuit and the scan driver circuit.

The chassis 20 supports the panel 1, dissipates heat generated from the driving circuit unit 30 and the panel 1, and serves as a ground of the electron emission display device so that the electron emission display device is stably driven. .

In the electron emission display device configured as described above, the anode electrode 12 of the upper substrate 10 is exposed to a portion where a high voltage of several kV is applied to receive a high voltage from the outside, and the chassis 20 serves as a ground. It is formed into a conductor. In addition, the portion where the anode electrode 12 of the upper substrate 10 is exposed and the chassis 20 do not have a large gap between the anode electrode 12 and the chassis 20 that are exposed due to the influence of foreign matters. There is a risk of arcing. Arcing is a moment in which high voltage is generated. When arcing occurs, a high voltage caused by arcing is momentarily transmitted to the panel 1 or the driving circuit unit 30, thereby damaging the panel 1 or the driving circuit unit 30.

Accordingly, the present invention was created to solve the problems of the prior art, and an object of the present invention is to prevent arcing from occurring between the anode electrode and the chassis to protect the driving circuit and panel of the electron-emitting display device. It is to provide an electron emitting display element which is prevented.

In order to achieve the above object, a first aspect of the present invention includes an anode electrode and is divided into an upper substrate and a lower substrate generating electrons colliding with the anode substrate by applying a voltage to the anode electrode through one side thereof. A panel in which the electrons collide with the upper substrate to generate light, a chassis attached to the lower substrate, and one side of which a voltage is applied to the anode electrode is formed of an insulator, and a driving circuit unit attached to the chassis and driving the panel. To provide an electron emission display device.

The second aspect of the present invention is divided into an upper substrate on which an anode electrode is formed and a lower substrate generating electrons colliding with the anode substrate, wherein the electrons collide with the upper substrate to generate light and are attached to the panel. One aspect of the present invention provides an electron emission display device including a chassis coated with an insulating material on one side of which an anode is applied to an anode electrode, and a driving circuit unit which is attached to the chassis and drives the panel.

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

2 is a structural diagram showing a structure of an electron emission display device according to the present invention, and FIG. 3 is a side view seen from the A direction. 2 and 3, the electron emission display device includes a panel 100, a driving circuit unit 300, and chassis 200a and 200b.

The panel 100 is formed to face the lower substrate 120 emitting the electrons and the lower substrate 120, and is divided into the upper substrate 110 generating light by colliding with the electrons emitted from the lower substrate 120. The 110 and the lower substrate 120 maintain a predetermined interval by the spacer 140.

The lower substrate 120 has a cathode electrode and a gate electrode arranged in a lattice shape, and an electron emission part is formed in an area where the cathode electrode and the gate electrode intersect, so that electrons are emitted from the electron emission part corresponding to the voltage of the cathode electrode and the gate electrode. Release.

The upper substrate 110 is formed with an anode electrode 130 and a fluorescent film (not shown) to which a high voltage of several kV is applied, so that electrons emitted from the lower substrate 120 are accelerated by the anode electrode 130 and thus the upper substrate. It collides with the fluorescent film of 110 to generate light to display an image.

In addition, the upper substrate 110 is formed larger than the lower substrate 120 so that the outer portion of the upper substrate 110 is not opposed to the lower substrate 120 so that the anode electrode 130 formed on the upper substrate 110. The part of) is exposed so that it can be easily connected to the part applying high voltage.

The driving circuit unit 300 transmits a data signal and a scan signal to the cathode electrode and the gate electrode to display an image by the data signal and the scan signal on the panel. The driving circuit unit 300 transmits a data driver circuit for generating and transmitting a data signal, a scan driver circuit for generating and transmitting a scan signal, an image signal for generating a control signal and a data signal to the data driver circuit and the scan driver circuit. And a timing controller for controlling the data driver circuit and the scan driver circuit.

The chassis 200a and 200b are formed of the conductor portion 200a and the non-conductor portion 200b, support the panel 100, and allow the driving circuit portion 300 to be attached to the chassis 200a and 200b. The conductor part 200a serves as a ground and transmits heat so that heat is radiated so that the panel 100 can be stably driven. In addition, the non-conductive portion 200b is formed to face the outer portion of the exposed upper substrate 110 to prevent arcing from occurring between the anode electrode 130 and the chassis 200a and 200b. The non-conductive part 200b may be formed by coating an insulating material such as silicon on the chassis formed of a conductor, and the chassis itself may be formed by combining a conductor and a non-conductor to be formed of a conductor. In addition, the portion of the non-conductor portion 200b that faces the portion where the anode electrode 130 is exposed is formed to be thicker to increase the effect of preventing arcing.

According to the electron-emitting display device for preventing arcing according to the present invention, there is no fear of arcing between the anode electrode and the chassis, thereby protecting the panel and the driving circuit due to the arcing.

While preferred embodiments of the present invention have been described using specific terms, such descriptions are for illustrative purposes only and it is understood that various changes and modifications may be made without departing from the spirit and scope of the following claims. You must lose.

Claims (4)

A panel having an anode formed therein, the panel being divided into an upper substrate and a lower substrate generating electrons colliding with the anode substrate by applying a voltage to the anode electrode through one side, wherein the electrons collide with the upper substrate to generate light; A chassis attached to the lower substrate and having one side of which a voltage is applied to an anode electrode formed of an insulator; And And a driving circuit unit attached to the chassis to drive the panel. The method of claim 1, And the non-conductor has a wider area of the portion facing the anode electrode. A panel divided into an upper substrate on which an anode electrode is formed and a lower substrate generating electrons colliding with the anode substrate, wherein the electrons collide with the upper substrate to generate light; A chassis attached to the panel and coated with an insulating material on one side to which a voltage is applied to an anode electrode; And And a driving circuit unit attached to the chassis to drive the panel. The method of claim 3, wherein And the insulating material is more widely coated on a portion facing the anode electrode.

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