Abstract: An electrophoretic display device with high reliability, high reflectance and improved color characteristics. The electrophorectic display device includes unit cells, each of which includes transmissive particles and a reflective panel. The unit cells are vertically laminated or arranged in parallel. In addition, the electrophorectic display device exhibits excellent visibility and has a simple structure.

Abstract: A color pixel structure of a color display system based on electrochromism. The color pixel structure includes two one-cell two-color type unit cells laminated. Each of the unit cells includes an upper panel, a lower panel and electrochromic materials of different colors applied to both the upper and lower panels. The color pixel structure exhibits improved color characteristics and have a simple structure. The color pixel structure can be applied to a variety of electrochromic displays due to their excellent visibility and simple structure.

Abstract: An electrochromic device which includes a display electrode including a conductive layer disposed on a transparent substrate, a counter electrode disposed to face the display electrode, the counter electrode including a white reflective layer, an electrolyte interposed between the display electrode and the counter electrode, a first electrochromic material layer disposed on the display electrode and a second electrochromic material layer disposed on the counter electrode.

Abstract: Example embodiments provide a method for preparing zinc oxide nanostructures. According to the method, zinc oxide nanostructures are prepared by dipping a substrate having a zinc (Zn) seed layer thereon in an aqueous solution of hexamethyleneamine and dropwise adding an aqueous solution of zinc nitrate to the aqueous solution of hexamethyleneamine. In addition, zinc ions can be continuously supplied in a constant amount as the reactions of the reactants proceed to prepare high-quality zinc oxide nanostructures at a high growth rate. Furthermore, zinc oxide nanostructures can be prepared on a large-area substrate at a low processing temperature regardless of the substrate material. Example embodiments also provide zinc oxide nanostructures prepared by the method.

Abstract: Disclosed are an electrochromic device and a method for fabricating the same. The electrochromic device comprises a transparent electrode, on which an electrochromic layer is formed, a counter electrode on which a reflective layer is formed, and an electrolyte layer interposed between the transparent electrode and the counter electrode. Since the electrolyte layer is formed in only an active region of unit pixels, neither crosstalk nor image diffusion occurs and only the selected region of unit pixels is operated. Thus, the electrochromic device can realize passive matrix displays capable of representing a desired color. Furthermore, the electrochromic device can be utilized in a variety of applications including flexible displays and electrical papers.

Abstract: An electrochromic device which includes a display electrode including a conductive layer disposed on a transparent substrate, a counter electrode disposed to face the display electrode, the counter electrode including a white reflective layer, an electrolyte interposed between the display electrode and the counter electrode, a first electrochromic material layer disposed on the display electrode and a second electrochromic material layer disposed on the counter electrode.

Abstract: In a transistor and a method of manufacturing the same, the transistor includes a channel layer arranged on a substrate, a source electrode and a drain electrode formed on the substrate so as to contact respective ends of the channel layer, a gate insulating layer surrounding the channel layer between the source electrode and the drain electrode, and a gate electrode surrounding the gate insulating layer.

Abstract: A transistor includes: a semiconductor substrate; a channel region arranged on the semiconductor substrate; a source and a drain respectively arranged on either side of the channel region; and a conductive nano tube gate arranged on the semiconductor substrate to transverse the channel region between the source and the drain. Its method of manufacture includes: arranging a conductive nano tube on a surface of a semiconductor substrate; defining source and drain regions having predetermined sizes and traversing the nano tube; forming a metal layer on the source and drain regions; removing a portion of the metal layer formed on the nano tube to respectively form source and drain electrodes separated from the metal layer on either side of the nano tube; and doping a channel region below the nano tube arranged between the source and drain electrodes by ion-implanting.

Abstract: A field emission type backlight device can include upper and lower substrates facing each other with a gap between them, an anode electrode on a lower side of the upper substrate, a fluorescent layer on a lower side of the anode electrode, a lower gate electrode on an upper side of the lower substrate, an insulating layer on an upper side of the lower gate electrode, a cathode electrode on an upper side of the insulating layer, and a gate electrode that is provided on an upper side of the insulating layer and electrically connected to the lower gate electrode.

Abstract: A field emission device using carbon nanotubes (CNTs) is provided. The field emission device includes a cathode on which a plurality of CNT emitters are arranged, a gate insulating layer having a through hole through which electrons emitted from the CNT emitters pass, and a gate electrode which corresponds to the through hole of the gate insulating layer and has an enlongated gate hole that forms an electric field having different strengths in a first direction and in a second direction orthogonal to the first direction.

Abstract: A field emission type backlight device can include upper and lower substrates facing each other with a gap between them, an anode electrode on a lower side of the upper substrate, a fluorescent layer on a lower side of the anode electrode, a lower gate electrode on an upper side of the lower substrate, an insulating layer on an upper side of the lower gate electrode, a cathode electrode on an upper side of the insulating layer, and a gate electrode that is provided on an upper side of the insulating layer and electrically connected to the lower gate electrode.

Abstract: A field emission backlight device includes: a front substrate and a rear substrate arranged in parallel and spaced apart from each other by a predetermined distance; an anode and a cathode arranged opposite to each other on a respective inner surfaces of the front and rear substrates; a fluorescent layer arranged on the anode and having a predetermined thickness; a convex portion including a plurality of convex projections arranged on an outer surface of the front substrate opposite to the anode; and electron emitters arranged on the cathode to emit electrons in response to an applied field.

Abstract: A panel for a field emission type backlight device may include a substrate having a plurality of grooves formed on a side of it. The grooves can serve to diverge incident light. An anode electrode and a fluorescent layer may be provided sequentially on the same side of the substrate.

Abstract: A field emission device and a backlight device using the field emission device includes a cathode electrode and a gate electrode formed in alternating parallel strips on a substrate, a catalytic metal layer arranged on the cathode electrode and adapted to enhance Carbon NanoTube (CNT) growth, and grown CNTs arranged on the catalytic metal layer.

Abstract: A field emission display with a separated upper electrode structure is provided. The field emission display includes: a lower substrate; lower electrodes arranged as stripes on the lower substrate; a field emitter array including a plurality of emitters arranged at a predetermined interval on each of the lower electrodes; an upper substrate which faces the lower substrate; upper electrodes arranged as stripes on the upper substrate to intersect the lower electrodes; and a phosphor array including a plurality of phosphors arranged on the upper electrodes, each phosphor pair of different colors being aligned with a respective one of the emitters, wherein an upper electrode aligned with each emitter is comprised of first and second upper electrodes connected to a respective phosphor pair of different colors. Such an upper electrode arrangement can be achieved through simple processes. In addition, a cross-talk phenomenon is prevented with the upper electrode structure and image quality is enhanced.

Abstract: Provided are a composite for paste including carbon nanotubes (CNTs), an electron emitting device using the same, and a manufacturing method thereof. The provided composite for paste includes 5 to 40 parts by weight of CNTs, 5 to 50 parts by weight of alkali metal silicate, and 1 to 20 parts by weight of a binder. The provided electron emitting device includes electron emitting tips, which are located on cathode electrodes in wells and formed of the composite for paste including 5 to 40 parts by weight of CNTs, 5 to 50 parts by weight of alkali metal silicate, and 1 to 20 parts by weight of a binder. The electron emitting device has excellent stability and durability and uniformly emits electrons from a large area, thereby improving the overall performance of an apparatus using the electron emitting device.

Abstract: A field emission device using carbon nanotubes (CNTs) is provided. The field emission device includes a cathode on which a plurality of CNT emitters are arranged, a gate insulating layer having a through hole through which electrons emitted from the CNT emitters pass, and a gate electrode which corresponds to the through hole of the gate insulating layer and has an enlongated gate hole that forms an electric field having different strengths in a first direction and in a second direction orthogonal to the first direction.

Abstract: A field emission display with a separated upper electrode structure is provided. The field emission display includes: a lower substrate; lower electrodes arranged as stripes on the lower substrate; a field emitter array including a plurality of emitters arranged at a predetermined interval on each of the lower electrodes; an upper substrate which faces the lower substrate; upper electrodes arranged as stripes on the upper substrate to intersect the lower electrodes; and a phosphor array including a plurality of phosphors arranged on the upper electrodes, each phosphor pair of different colors being aligned with a respective one of the emitters, wherein an upper electrode aligned with each emitter is comprised of first and second upper electrodes connected to a respective phosphor pair of different colors. Such an upper electrode arrangement can be achieved through simple processes. In addition, a cross-talk phenomenon is prevented with the upper electrode structure and image quality is enhanced.

Abstract: Provided are a composite for paste including carbon nanotubes (CNTs), an electron emitting device using the same, and a manufacturing method thereof. The provided composite for paste includes 5 to 40 parts by weight of CNTs, 5 to 50 parts by weight of alkali metal silicate, and 1 to 20 parts by weight of a binder. The provided electron emitting device includes electron emitting tips, which are located on cathode electrodes in wells and formed of the composite for paste including 5 to 40 parts by weight of CNTs, 5 to 50 parts by weight of alkali metal silicate, and 1 to 20 parts by weight of a binder. The electron emitting device has excellent stability and durability and uniformly emits electrons from a large area, thereby improving the overall performance of an apparatus using the electron emitting device.

Abstract: A spacer using a cross structure, which is used to maintain the interval between two panels, for large flat panel display devices, and a flat panel display device using the spacer, are provided. This spacer includes a cross-rib type spacer obtained by combining a cross structure and a rib structure, and a cross-trapezoid type spacer obtained by combining a cross structure and a trapezoid rib structure. These spacer structures facilitate enlargement of panels by increasing the supporting strength while maintaining a high aspect ratio. Also, while these types of spacers are incorporated with a metal mesh, the distance between the mesh and a substrate is freely controlled according to the length of a cross structure, thereby improving the focusing of emitted electrons.