Abstract: A method of preparing a conductive nano ink composition. The method includes mixing a metal precursor in a solution of a multi-functional polymer having a chemical reduction function and a particle growth suppression function to form a mixture solution, forming primary particles by stirring the mixture solution at about 800 to about 1,200 rpm for about 10 to about 20 minutes, and forming secondary particles by leaving the mixture solution at room temperature.

Abstract: Hybrid composites including carbon nanotubes and a carbide-derived carbon material, electron emitters including the hybrid composites, methods of preparing the electron emitters, and electron emission devices including the electron emitters are provided. Specifically, a hybrid composite includes at least one carbon nanotube and a carbide-derived carbon material. The carbide-derived carbon material is prepared by thermochemically reacting a carbide compound with a halogen-containing gas to extract substantially all of the elements except for the carbon in the carbide compound. Since the carbon nanotubes and the carbide-derived carbon material are hybridized and composited, a screen effect that may occur when large amounts of carbon nanotubes are used can be prevented, and an electron emitter including the hybrid composite has excellent electron emission capabilities, excellent uniformity, and a long lifetime.

Abstract: A light emission device includes first and second substrates opposing each other to form a vacuum vessel, an electron emission unit located on the first substrate, a light emission unit located on the second substrate and emitting visible light in response to electrons emitted from the electron emission unit, and a heat dissipating sheet located on an outer surface of the second substrate. The heat dissipating sheet includes carbon nanotubes. A display device includes the light emission device, and a panel assembly located in front of the light emission device to transmit therethrough the light emitted from the light emission device to display images.

Abstract: Electron emission devices include first electrodes on a substrate extending in a first direction and spaced apart from each other. Second electrodes are on the substrate alternating between the first electrodes and extending in a second direction opposing the first direction. First electron emitters and second electron emitters are on side surfaces of the first electrodes and the second electrodes, respectively. Gaps are formed between the first electron emitters and second electron emitters.

Abstract: An electron emission device includes a first plate and a second plate spaced apart and facing each other, a first electrode having an electron emission source electrically coupled thereto, the electron emission source including a carbon-based material and a ferroelectric material, a second electrode disposed adjacent to the first electrode, and a phosphor layer disposed so as to receive electrons emitted by the electron emission source.

Abstract: The present invention relates to a phosphor for UV and long-wavelength excitation and a preparation method thereof, more particularly to a phosphor for UV and long-wavelength excitation prepared from a phosphor precursor comprising strontium, barium, zinc, silica and rare-earth metal, wherein the proportion of barium and zinc is optimized to obtain a color coordinate in the range of x=0.50-0.64 and y=0.38-0.51, and a method for preparing the same by heat-treating the phosphor precursor under a mixed gas atmosphere of nitrogen and hydrogen with specific proportion. Since heat treatment is possible even at low temperature, a phosphor for UV and long-wavelength excitation having superior luminescence characteristics and thus offering superior efficiency when applied to diodes or liquid crystal displays can be obtained without having to use conventional flux materials to lower baking temperature and without using toxic substances.

Abstract: Disclosed are a method of preparing a conductive ink composition for a flexible printed circuit (FPC) and a method of producing a printed circuit board using the conductive ink composition. This method includes preparing a first solution by mixing a Ag-containing compound and a fatty acid dispersion stabilizer in a polar solvent; preparing a second solution including Ag nanoparticles reduced from the Ag-containing compound by adding a reducing agent to the first solution; phase-transitioning the Ag nanoparticles into a nonpolar solvent by adding a phase-transition agent and a nonpolar solvent to the second solution including the Ag nanoparticles; and separating the nonpolar solvent including the Ag nanoparticles therefrom.

Abstract: Disclosed is a conductive ink composition for a flexible printed circuit (FPC), and a method of producing a printed board using the same. The conductive ink composition for a flexible printed circuit (FPC) includes a Ag-containing compound, a dispersion stabilizer, and a solvent.

Abstract: A light emission device including: first substrate and second substrates facing each other with a vacuum region therebetween; an electron emission region at a surface of the first substrate facing the second substrate; a driving electrode at the surface of the first substrate and for controlling an amount of electrons emitted from the electron emission region; an anode at a surface of the second substrate facing the first substrate; a phosphor layer on one surface of the anode and for receiving the electrons emitted from the electron emission region; and a reflective layer covering the phosphor layer, wherein the reflective layer comprises a first reflective layer comprising Al and a second reflective layer comprising Ag. Here, the light emission device according an embodiment of the present invention to the present invention has a reflective layer that is highly reflective, so as to improve cathode luminous efficiency of the phosphor layer.

Abstract: A composition for an integrated cathode-electron emission source includes (A) 0.5 to 60 wt % of a metal powder, (B) 0.1 to 10 wt % of a carbon-based material, (C) 1 to 40 wt % of an inorganic filler, and (D) 5 to 95 wt % of a vehicle. A method of making an integrated cathode-electron emission source includes coating the composition on a substrate, and heat treating the coated substrate. An electron emission device includes a first substrate and a second substrate facing each other, an integrated cathode-electron emission source including a metal and a carbon-based electron emission source on one surface of the first substrate, and a light emitting unit on one surface of the second substrate.

Abstract: A light emission device includes: a first substrate and a second substrate arranged opposite each other with a vacuum region therebetween; an electron emission region located at a side of the first substrate facing the second substrate; a driving electrode located on the first substrate and for controlling an emitting current amount (e.g., magnitude) of the electron emission region; an anode located at a side of the second substrate facing the first substrate; a phosphor layer on one surface of the anode and corresponding to pixel areas; and a spray coated Ag reflective layer covering the phosphor layer and having reflectivity between about 90% and about 99.9%.

Abstract: A carbon nanotube hybrid system includes: a carbide-derived carbon prepared by reacting a carbide compound and a halogen group containing gas to extract elements of the carbide compound except carbons; metals supported on the carbide-derived carbon or remaining in the carbide-derived carbon; and carbon sources from which carbon nanotubes are grown from the carbide-derived carbon. A method of preparing the carbon nanotube hybrid system includes preparing the carbide-derived carbon, extracting elements therefrom, and growing carbon nanotubes from the carbide-derived carbon. The carbon nanotube hybrid system has excellent uniformity and a long lifetime. An electron emitter having improved electron emitting properties can be inexpensively prepared using the carbon nanotube hybrid system compared to conventional carbon nanotubes. An electron emission device having excellent electron emitting properties can be prepared using the electron emitter.

Abstract: An electron emitting device includes a substrate, a plurality of first wiring units, each of the plurality of first wiring units including a plurality of first electrodes extending in a first direction on the substrate and spaced apart from each other, a plurality of second wiring units, each of the plurality of second wiring units including a plurality of second electrodes each extending in a direction substantially opposite to the first direction and interposed between adjacent first electrodes of the plurality of first electrodes, and a plurality of first electron emitters at sides of the first electrodes and a plurality of second electron emitters at sides of the second electrodes, wherein at least one of the plurality of first wiring units or the plurality of second wiring units is configured to be driven separately.

Abstract: An electron emission device includes a substrate; first electrodes on the substrate and spaced apart from each other in a first direction; a second electrode electrically insulated from the first electrodes and extending in a second direction crossing the first direction; and electron emitters located on sides of each of the first electrodes.

Abstract: A light emission device includes first and second substrates facing each other. An electron emission unit is located on a surface of the first substrate and that has an electron emission element. A light emission unit is located on a surface of the second substrate. The electron emission element has first electrodes located on a surface of the first substrate and spaced apart from each other. Second electrodes are located between the first electrodes in parallel with each other. Electron emission regions are located on side surfaces of the first electrodes facing the second electrodes. The first and second electrodes are oblique relative to one of planar orthogonal coordinate directions of the first substrate.

Abstract: An electron emission device includes a base substrate and first electrodes formed on the base substrate in one direction. Second electrodes are formed on the base substrate in the one direction and spaced apart from the first electrodes by a predetermined interval and parallel to each other. First electron emission layers are formed on the first electrodes. Second electron emission layers are formed on the second electrodes. The interval between adjacent first and second electrodes is substantially equal to an interval between adjacent first and second electron emission layers.

Abstract: An electron emission source including a carbon-based material coated with metal carbide in the surface coating layer, of which the metal has a negative Gibbs free energy when forming the metal carbide at 1,500 K or lower, a method of preparing electron emission sources, and an electron emission device including the electron emission source. The electron emission source includes a carbon nanotube coated with metal carbide or a carbon nanotube having a metal carbide layer and a metal coating layer, which are sequentially formed thereon. Thus, the electron emission source has long lifespan without deterioration of electron emitting characteristics. The electron emission source can be used to manufacture electron emission devices with improved reliability.

Abstract: A flat panel display apparatus includes a display unit for displaying images, a first semiconductor and a second semiconductor electrically connected to the display unit, and a heat sink electrically connected to the first semiconductor and to the second semiconductor.

Abstract: A water-based composition is used to form an electron and includes a carbonaceous compound, a silicate compound, and water. The electron emitter includes a carbonaceous compound and a silicate compound and is prepared using the water-based composition, and an electron emission device includes the electron emitter. The water-based composition that is used to form an electron emitter is suitable for forming a distinctive pattern, and the electron emitter prepared using the water-based composition has very small residual carbon content.

Abstract: An electron emission device and a light emission apparatus including the same are provided. The electron emission device and the light emission apparatus including the same have a local dimming capability. The electron emission device includes a substrate; first electrodes spaced apart from one another and extending in a first direction on the substrate; second electrodes disposed between the first electrodes and extending in parallel with the first electrodes; a plurality of third electrodes electrically insulated from the first electrodes and the second electrodes, and extending in a direction crossing the first direction; and first electron emission units and second electron emission units, which are respectively formed on side surfaces of the first electrodes and the second electrodes.