1122results about "Discharge tube cold cathodes" patented technology

A novel field emitter material, field emission electron source, and commercially feasible fabrication method is described. The inventive field emission electron source produces reliable electron currents of up to 400 mA / cm2 at 200 volts. The emitter is robust and the current it produces is not sensitive to variability of vacuum or the distance between the emitter tip and the cathode. The novel emitter has a sharp turn-on near 100 volts.

Field emission display and method for fabricating the same, the field emission display including a cathode array having a cathode electrode formed on a substrate, insulating layers and carbon nanotube films for use as emitter electrodes formed alternately on the cathode electrode, and a gate electrode formed on the insulating layer, thereby permitting fabrication of a large sized cathode plate at a low cost because the film is formed by screen printing and exposure, which can reduce the cumbersome steps in fabrication of the related art Spindt emitter tip, and both a low voltage and a high voltage FEDs because the carbon nanotube film used as the emitter has a low work function, with an easy and stable electron emission capability.

An electron-emitting device disclosed has stable electron emission characteristics with little variation, in high electron emission efficiency, in high definition, and at low driving voltage. The electron-emitting device disclosed is constructed in such structure that on a substrate there are a lower electrode, an insulating layer having pores, and an upper electrode stacked in this order, the insulating layer is an anodic oxide layer, and a carbon deposit is formed in the pores.

A light filament (206) formed from carbon nanotubes is characterized by high mechanical strength and durability at elevated temperatures, a high surface area to volume ratio, and high emissivity. Additionally, electrical resistance of the light filament does not increase with increasing temperature as much as electrical resistance of metallic light filaments. Accordingly, power consumption of the light filament is low at incandescent operating temperatures. A method for making a light filament made of carbon nanotubes includes the steps of: forming an array of carbon nanotubes (20); pulling out carbon nanotube yarn (204) from the carbon nanotube array; and winding the yarn between two leads (30) functioning as electrodes to form the light filament.

An improved light-emitting panel having a plurality of micro-components sandwiched between two substrates is disclosed. Each micro-component contains a gas or gas-mixture capable of ionization when a sufficiently large voltage is supplied across the micro-component via at least two electrodes. Several improved methods of forming micro-components are also disclosed.

A method and apparatus for driving an electron source in which a high-quality image display is presented by correcting a non-uniform effective current distribution caused in cold cathode elements by leakage current. A digital video signal enters a shift register where a serial-to-parallel conversion is made for each line of an image based upon a shift clock signal. One line of the image data that has been subjected to the serial-to-parallel conversion is latched in a latch circuit and then applied to a voltage modulating circuit. The latter voltage-modulates the input data and sends the modulated signal to a voltage / current converting circuit. The latter converts the voltage quantity to a current quantity, which is applied to each of the cold cathode elements of a display panel through respective column terminals. A voltage V1 is applied to the selected row wire, and a voltage V2 (V2<> V1) is applied to all other row wires, for controlling the leakage current.

The present invention provides co-doped zinc oxide to flat panel, light emissive display devices and vacuum microelectronic devices to improve their efficiency and lifetime. This material has a low growth temperature and is compatible with metal oxide semiconductor (MOS) processing technology. It is tranparent, chemically stable and has a low work function, which result in many advantages when being used as the cathode for the aforementioned devices. In one embodiment of the emissive display device, an organic light diode (OLED) display has a high work function metal anode, such as platinum (Pt), gold (Au) or nickel (Ni) and a low work function co-doped zinc oxide cathode. Because of the energy level alignment provided by these two materials, the potential energy barriers to injection of electrons from the cathode and holes from the anode into the organic emissive medium are minimized so the display device operates more efficiently.

The present invention relates to a field emission device comprising an anode and a cathode, wherein said cathode includes carbon nanotubes which have been treated with an ion beam. The ion beam may be any ions, including gallium, hydrogen, helium, argon, carbon, oxygen, and xenon ions. The present invention also relates to a field emission cathode comprising carbon nanotubes, wherein the nanotubes have been treated with an ion beam. A method for treating the carbon nanotubes and for creating a field emission cathode is also disclosed. A field emission display device containing carbon nanotube which have been treated with an ion beam is further disclosed.

The present invention is directed to compositions comprising a nanoparticulate clopidogrel and aspirin combination, or salts or derivatives thereof, having improved clopidogrel bioavailability. The nanoparticulate clopidogrel particles, and optionally the nanoparticulate aspirin particles, of the composition have an effective average particle size of less than about 2000 nm and are useful in the prevention and treatment of pathologies induced by platelet aggregation. The clopidogrel and aspirin particles may also be formulated as a controlled release polymeric coating or matrix drug delivery system.

Disclosed are an electron-emitting element having a large operating current at a low operating voltage and excellent operation stability, and an electron source, an image display device and the like utilizing such an electron-emitting element, and further a method of fabricating such an element with few process steps at low cost. A cold cathode member is configured utilizing hybrid particle of a first particle serving to emit electrons into the space and a second particle being in the vicinity of the first particle and serving to control the position of the first particle. In this configuration, it is preferable that the first particle have a higher electron emission efficiency than the second particle and that the second particle be conductive.

A cold cathode field emission device comprising (a) a cathode electrode formed on a supporting substrate, and (b) a gate electrode which is formed above the cathode electrode and has an opening portion, and further comprising (c) an electron emitting portion composed of a carbon film formed on a surface of a portion of the cathode electrode which portion is positioned in a bottom portion of the opening portion.

A hollow graphene sheet structure has at least one pair of hollow graphene sheet materials disposed in a continuous form, in which the adjacent ends of the pair of hollow graphene sheet materials are opposed to each other with a gap.

A flat-type display comprising a first panel having electron-emitting portions; a second panel having an electron irradiation surface; and an electron-emitting-portion driving circuit for driving the electron-emitting portions, wherein an electron-emitting-portion cutoff circuit is provided between the electron-emitting portions and the electron-emitting-portion driving circuit for preventing a discharge between the electron-emitting portions and the electron irradiation surface.

This invention provides an electron source manufacturing apparatus which can be easily downsized and operated. The electron source manufacturing apparatus includes a support member for supporting a substrate (10) having a conductor (11), a vessel (12) which has a gas inlet port (15) and a gas exhaust port (16) and covers a partial region of the surface of the substrate (10); a gas inlet unit (24) connected to the gas inlet port (15) to introduce gas into the vessel, an exhaust unit (26) connected to the gas exhaust port to evacuate the interior of the vessel, and a voltage application unit (32) for applying a voltage to the conductor.

Integrated circuits, including field emission devices, have a resistor element of amorphous SixC1-x wherein 0<x<1, and wherein the SixC1-x incorporates at least one impurity selected from the group consisting of hydrogen, halogens, nitrogen, oxygen, sulphur, selenium, transition metals, boron, aluminum, phosphorus, gallium, arsenic, lithium, beryllium, sodium and magnesium.

A method for producing a durable electron-emitting device having a uniform electron emission characteristic, an electron source, and an image-forming apparatus having a uniform display characteristic for a long period are provided. The method for producing an electron-emitting device according to the present invention includes the steps of: disposing a cathode electrode on a surface of a substrate; providing an electrode opposite the cathode electrode; disposing plural pieces of fiber containing carbon as a main component on the cathode electrode; and applying potential higher than potential applied to the cathode electrode under depressurized condition to an electrode opposite the cathode electrode.

An electron-emitting device having a small electron beam size is proposed. In order to provide a high definition image display device having high image quality by utilizing this type of electron-emitting device and an electron source, a cathode electrode (2) has an opening which is trenched in a portion thereof, and further, the depth at which the opening is trenched is deep at a peripheral portion of the opening bottom face, and shallow at a central portion of the opening bottom face. A surface of an electron-emitting material is formed in a portion deeper than a boundary surface between the cathode electrode and an insulating layer.

A field emission array adopting carbon nanotubes as an electron emitter source, wherein the array includes a rear substrate assembly including cathodes formed as stripes over a rear substrate and carbon nanotubes; a front substrate assembly including anodes formed as stripes over a front substrate with phosphors being deposited on the anodes, a plurality of openings separated by a distance corresponding to the distance between the anodes in a nonconductive plate, and gates formed as stripes perpendicular to the stripes of anodes on the nonconductive plate with a plurality of emitter openings corresponding to the plurality of openings. The nonconductive plate is supported and separated from the front substrate using spacers. The rear substrate assembly is combined with the front substrate assembly such that the carbon nanotubes on the cathodes project through the emitter openings.

A field emission cathode device consisting of an electrically conducting material and with a narrow, rod-shaped geometry or a knife edge, to achieve a high amplification of the electric field strength is characterized in that the electron-emitting part of the field emission cathode at least partly has preferred cylindrical host molecules and / or compounds with host compounds and / or cylindrical atomic networks, possibly with end caps with diameters measuring in the nanometer range.

A flat-type display comprising a first panel having electron-emitting portions; a second panel having an electron irradiation surface; and an electron-emitting-portion driving circuit for driving the electron-emitting portions, wherein an electron-emitting-portion cutoff circuit is provided between the electron-emitting portions and the electron-emitting-portion driving circuit for preventing a discharge between the electron-emitting portions and the electron irradiation surface.

The present invention provides an emissive flat panel display device which is capable of performing a gate operation at a relatively low voltage of several V to several tens V using gate electrodes. In the emissive flat panel display device which includes a back panel which is constituted of a back substrate on which cathode electrodes having electron sources formed of carbon nanotubes and gate electrodes are formed, a face panel which forms phosphors and anode electrodes thereon, and a sealing frame which seals the back panel and the face panel, the difference between an electric field strength Emax for allowing the electron sources to obtain the required maximum emission current density and an electric field strength Emin which becomes the minimum emission current density is set to 1V / μm or less, and preferably 0.5V / μm or less.

A field emission cathode device consisting of an electrically conducting material and with a narrow, rod-shaped geometry or a knife edge, to achieve a high amplification of the electric field strength is characterized in that the electron-emitting part of the field emission cathode at least partly has preferred cylindrical host molecules and / or compounds with host compounds and / or cylindrical atomic networks, possibly with end caps with diameters measuring in the nanometer range.

An electron emission device is provided comprising first and second substrates facing each other and separated from each other by a predetermined distance. An electron emission unit is disposed on the first substrate, and an image display unit is disposed on the second substrate. A focusing electrode comprising a plurality of beam-guide holes is disposed between the first and second substrates. The portion of the focusing electrode located near a beam-guide hole comprises a thin layer. The remainder of the focusing electrode comprises a thick layer having a thickness larger than the thickness of the thin layer.

A system and method for addressing individual electron emitters in an emitter array is disclosed. The system includes an emitter array comprising a plurality of emitter elements arranged in a non-rectangular layout and configured to generate at least one electron beam and a plurality of extraction grids positioned adjacent to the emitter array, each extraction grid being associated with at least one emitter element to extract the at least one electron beam therefrom. The field emitter array system also includes a plurality of voltage control channels connected to the plurality of emitter elements and the plurality of extraction grids such that each of the emitter elements and each of the extraction grids is individually addressable. In the field emitter array system, the number of voltage control channels is equal to the sum of a pair of integers closest in value whose product equals the number of emitter elements.

A luminescence display panel, which can be manufactured without any damage to an organic layer thereof, and a method for fabricating the same are disclosed. According to one of the embodiments in the present invention, the luminescence display panel includes a first electrode formed on a lower substrate, an organic layer formed on the first electrode, the organic layer including a luminescence layer, a second electrode formed on the organic layer, the second electrode having a thin film structure, and an auxiliary electrode formed on an upper substrate and facing the lower substrate, the auxiliary electrode being connected to the second electrode. The second electrode is thinner than at least one of the first electrode and the auxiliary electrode.

A display device has an emitting region constituted by a plurality of first electrodes provided on a substrate and extending in parallel, a plurality of second electrodes provided on the first electrodes and extending substantially perpendicularly to the first electrodes, and a plurality of emission sites for emitting electrons or light respectively connected to a plurality of intersections between the first and second electrodes and arranged on the substrate and has a peripheral region surrounding the emitting region on the substrate. In this display device, first and second groups of external repeating terminals for the first and second electrodes are collectively provided side by side in a part of the peripheral region.

Disclosed is an electron emission source composition for a field emission display device including 1 to 20% by weight of carbon nano tubes; glass frit; an organic binder resin comprising ethyl cellulose and acrylate resin and / or acryl resin; and an organic solvent, wherein the glass frit is present in an amount of 1 to 500 parts by weight with respect to 100 parts by weight of the carbon nano tubes.

For use in cathodoluminescent field emission display devices, a cathode emitter can comprise an inverted field effect transistor having a diamond film or other low effective work function material deposited onto the channel layer of the transistor, such that the diamond film provides a source of primary electron emissions. A variable voltage source is applied to the gate of the transistor creating an electric field that controls the conductivity of the channel layer, thereby activating or deactivating electron emissions from this cathode emitter structure. In addition, electron blocking junctions can be incorporated into the emitter structure to inhibit current flow through the device during a deactivated state. In a variation, the transistor of the cathode emitter has the diamond film being deposited onto an electrically conductive pad that is electrically connected to, and extending outwardly from, the transistor. Alternatively, a sideways laterally gated transistor structure can be used with the emitter surface being applied to the transistor's drain. A near mono-molecular oxide film of high secondary electron emission material can also be included on the emitter surface for enhanced electron emissions.