Abstract: An electron emission device includes a substrate with an effective area and a pad area placed external to the effective area. Cathode electrodes are formed on the substrate. Electron emission regions are formed at the cathode electrodes within the effective area. Gate electrodes are separately insulated from the cathode electrodes by interposing an insulating layer, and have opening portions to expose the electron emission regions. The respective gate electrodes have an effective portion located at the effective area with a first line width, and a pad portion located at the pad area with a second line width. When the line width subtracted from the first line width by the whole line width of the opening portions placed in the width direction of the effective portion is defined as an effective line width, the second line width is established to be larger than the effective line width.

Abstract: An electron emission display device includes a first substrate and a second substrate facing each other, a side member formed along edges of the first substrate and the second substrate to form a vacuum envelope together with the first substrate and the second substrate, an electron emission unit provided on the first substrate, a light emission unit provided on the second substrate for emitting visible light by means of electrons from the electron emission unit, and a conductive layer formed on at least a partial exterior surface of the vacuum envelope and connected to a ground voltage for discharging static charge accumulated in the vacuum envelope.

Abstract: A surge protector coated with an oxide layer having an excellent chemical stability at the high temperature range and excellent adherence with respect to main discharge electrodes. The surge protector includes a column-shaped ceramic member that has a conductive film divided by a discharge gap interposed therebetween; a pair of main discharge electrode members opposite to each other on both ends of the column-shaped ceramic member to come in contact with the conductive film; and a cylindrical ceramic tube which is fitted to the pair of main discharge electrode members opposite to each other to seal both the column-shaped ceramic member and sealing gas inside thereof. Oxide films are formed on main discharge surfaces of at least the protrusive supporting portions of the pair of main discharge electrode members opposite to each other, by performing an oxidation treatment, respectively.

Abstract: An electron emission display device capable of achieving a high efficiency. In one embodiment, the electron emission display device includes a first substrate, a second substrate facing the first substrate, an electron emission unit formed on the first substrate, and a light emission unit having a phosphor layer patterned on the second substrate. In this embodiment, when an area of an electron beam spot of an electron beam emitted from the electron emission unit and landed on the phosphor layer is indicated by A, and an area of the phosphor layer corresponding to the electron beam spot is indicated by B, the areas A and B satisfy: 0.9?A/B?1.4.

Abstract: An electron emission device includes a first substrate; a second substrate facing the first substrate and separated therefrom by a predetermined distance; cathode electrodes, each comprising first electrodes formed on the first substrate, and a plurality of second electrodes spaced apart from the first electrodes; electron emission regions formed on the plurality of second electrodes; resistance layers interconnecting the first electrodes and each of the plurality of second electrodes while surrounding the electron emission regions; an insulating layer positioned over the resistance layers and the cathode electrodes; and gate electrodes formed over the insulating layer.

Abstract: A field emission display. Gate electrodes are formed in a predetermined pattern on a first substrate. An insulation layer is formed on the first substrate covering the gate electrodes. Cathode electrodes are formed in a predetermined pattern on the insulation layer. Emitters are provided electrically contacting the cathode electrodes. A second substrate is provided opposing the first substrate with a predetermined gap therebetween. The first substrate and the second substrate form a vacuum container. An anode electrode is formed on a surface of the second substrate opposing the first substrate. Phosphor layers are formed in a predetermined pattern on the anode electrode. Portions of the cathode electrodes are removed to form emitter-receiving sections. Fences are formed between the emitter-receiving sections, one of the emitters being provided in each of the emitter-receiving sections electrically contacting the cathode electrodes.

Abstract: An electron emission device and a method of driving the electron emission device are capable of preventing the deterioration of luminance in displaying moving images by inhibiting the emission delay. The electron emission device includes cathode electrodes, gate electrodes formed over the cathode electrodes, and an insulating layer disposed between the cathode electrodes and the gate electrodes. Electron emission regions are formed on the cathode electrodes to emit electrons under the application of electric fields generated due to a difference between voltages applied to the cathode electrodes and the gate electrodes. A driving unit applies voltages to the cathode electrodes and the gate electrodes. An anode electrode receives a positive voltage to accelerate the electrons emitted from the electron emission regions. A first voltage Vc applied to the cathode electrodes and a second voltage Vg applied to the gate electrodes satisfy the following condition: 0.4?Vc/Vg<0.8.

Abstract: A hinge structure is provided. The hinge structure uses a magnetic force and includes a shaft, provided at one side of a cover and rotatably supported by a body. At least one permanent magnet having a magnetic field perpendicular to the longitudinal direction of the shaft is fixed to the shaft. A shaft operation portion is provided in the cover for rotating the shaft by about 180 degrees and rotating between a first position and a second position by a user's operation. At least one electromagnet is arranged at a position corresponding to the permanent magnet of the body, thereby aiding the opening and closing of the cover and absorbing any impact using a magnetic force between the permanent magnet and the electromagnet.

Abstract: An electron emission device includes electron emission regions formed on a first substrate, a driving electrode for controlling emission of electrons emitted from the electron emission regions, and a focusing electrode for focusing the electrons and having an opening through which the electrons pass. A first insulating layer is disposed between the driving electrode and the focusing electrode. The focusing electrode and the insulating layer satisfy at least one of the following two conditions: 1.0?|Vf/t|?6.0; and 0.2?|Vf/Wh|?0.4, where Vf (V) indicates the voltage applied to the focusing electrode, t (?m) indicates the thickness of the insulating layer, and Wh (?m) indicates the width of the opening of the focusing electrode.

Abstract: An electron emission device includes a first substrate; a second substrate facing the first substrate and spaced apart from the first substrate; an electron emission unit on the first substrate, the electron emission unit having at least two electrodes and an emission region for emitting electrons; and a light emission unit on the second substrate to be excited by a beam formed with the electrons. The electron emission unit includes a focusing electrode for focusing the beam. The light emission unit includes a screen on which pixels are arranged in a pattern. Each of the pixels has a phosphor layer. The phosphor layer of one of the pixels is excited by the beam. The focusing electrode includes an opening, through which the beam passes. A length of the opening is Lv, a pitch of a pixel is Pv, and Lv and Pv satisfy: 0.25 <Lv/Pv?0.60.

Abstract: An electron emission device includes a substrate, a plurality of cathode electrodes formed on the substrate, a plurality of electron emission regions electrically coupled to the cathode electrodes, an insulating layer formed on the substrate while covering the cathode electrodes, and a plurality of gate electrodes formed on the insulating layer and crossing the cathode electrodes. The insulating layer is provided with a plurality of openings exposing the corresponding electron emission regions, each of the openings having at least two opening portions that communicate with each other and are different in a size from each other. The gate electrodes are provided with openings communicating with the corresponding openings of the insulating layer. The two opening portions may include a gap in the insulating layer where the gate and cathode electrodes interesect.

Abstract: An electron emission device includes a substrate; a cathode electrode formed on the substrate; a gate electrode crossing the cathode electrode and insulated from the cathode electrode; and an electron emission region electrically connected to the cathode electrode. The cathode electrode includes a main electrode with an inner opening portion, an isolate electrode placed in the opening portion and spaced apart from the main electrode by a distance, and a resistance layer disposed between the main electrode and the isolate electrode. The isolate electrode has a via hole. The electron emission region contacts the isolate electrode, and is placed in the via hole. The isolate electrode has a first height, and the electron emission region has a second height smaller than the first height.

Abstract: An electron emission device includes first electrodes formed on a substrate and oriented in a first direction of the substrate, and isolated electrodes disposed on a same plane as the first electrodes while being spaced apart from the first electrodes. The isolated electrodes are separately formed and arranged in the first direction as well as in a second direction crossing the first direction. Line electrodes are placed on a different plane from the first electrodes and the isolated electrodes and are disposed on an insulating layer. Each of the line electrodes is electrically connected to a respective plurality of the isolated electrodes arranged along the second direction to form a second electrode together with the respective plurality of the isolated electrodes. Electron emission regions are formed on the isolated electrodes along the peripheral sides of the isolated electrodes proximate to the first electrodes.

Abstract: An electron emission display for improving brightness uniformity by compensating brightness deviation between respective elements. The electron emission display includes a display panel, a scan driver, a data driver, and a brightness compensator. The display panel includes a plurality of scan electrodes, a plurality of data electrodes, and a plurality of display elements respectively formed at crossing points of the scan electrodes and the data electrodes. The display elements respectively include an electron emitter. The scan driver applies a selection signal to the scan electrode. The data driver applies a data signal to the data electrode. The brightness compensator compensates brightness by changing the data signal when brightness deviation of the display elements is greater than a predetermined threshold value.

Abstract: An electron emission device includes first electrodes arranged on a substrate in a direction of the substrate, and an insulating layer arranged on an entire surface of the substrate and covering the first electrodes. Second electrodes are arranged on the insulating layer and are perpendicular to the first electrodes. Electron emission regions are connected to one of the first and the second electrodes. The lateral edges of the first electrodes and the lateral edges of the second electrodes respectively cross each other.

Abstract: A field emission display includes a first substrate and a second substrate opposing one another with a predetermined gap therebetween. At least one gate electrode is formed on the first substrate. An insulation layer formed over the first substrate covering the gate electrode. Cathode electrodes are formed on the insulation layer and including field enhancing sections that expose the insulation layer corresponding to pixel regions. Electron emission sources formed over the cathode electrodes adjacent at least one side of the field enhancing sections. An illumination assembly is formed on the second substrate and realizes the display of images by electrons emitted from the electron emission sources.

Abstract: A flat panel display includes a back plate, gate electrode and cathode electrodes disposed on the back plate and insulated from each other by an insulating layer, a planar field emission source formed of carbonaceous material disposed on the cathode electrode, a grid plate provided with a plurality of apertures corresponding to a pixel area and spaced from the back plate, first and second grid electrodes formed on each surface of the grid plate, respectively, and a faceplate spaced from the grid plate and a screen formed on one surface thereof facing the grid plate.

Abstract: An electron emission device which increases the amount of electron emission without heightening the driving voltage for making the electron emission. The electron emission device includes a substrate, first electrodes formed on the substrate, electron emission regions electrically connected to the first electrodes, and second and third electrodes placed at planes different from the first electrodes. The second and the third electrodes receive the same voltage, and form the electric field for emitting electrons from the electron emission regions. Fourth electrodes may be placed at substantially the same plane as the first electrodes, and receive the same voltage as the second and the third electrodes.

Abstract: An electron emission device can include gate electrodes formed on a substrate and cathode electrodes insulated from the gate electrodes with an insulating layer interposed between them. Each cathode electrode can have a receptor at a peripheral side. Electron emission regions may be formed within the receptors and in contact with the cathode electrodes. Counter electrodes can face the cathode electrodes, can be coplanar with the cathode electrodes, and can be coupled to the gate electrodes. The shortest distance between the electron emission region and the counter electrode may be smaller than the shortest distance between the cathode electrode and the counter electrode.

Abstract: A cathode substrate for an electron emission device includes a substrate, electron emission regions formed on the substrate, and one or more driving electrodes controlling the electrons emitted from the electron emission regions. A first insulating layer contacts the driving electrodes. A focusing electrode is provided in the cathode substrate to focus the electrons emitted from the electron emission regions. A second insulating layer is located between the driving electrodes and the focusing electrode. The materials used in the first and the second insulating layers have different etch rates.