Abstract: The present invention provides an apparatus and method for manufacturing super high fluidity urethane-based spherical fine powder for powder slush molding by melting and mixing a super high fluidity urethane-based thermoplastic resin at high temperature, passing the thermoplastic resin through micro-sized fine holes to be extruded into a fine diameter, cutting the extruded thermoplastic resin into spherical fine powder having a uniform particle size, and drying the cut spherical fine powder.

Abstract: Disclosed herein is a radio frequency (RF) repeater comprising an analog signal processing unit and a digital signal processing unit, wherein the analog signal processing unit includes a filtering unit; an amplification unit on receiving side; a frequency conversion unit on receiving side; a frequency conversion unit on transmitting side; and an amplification unit on transmitting side, and the digital signal processing unit includes a receiving signal detection unit; the automatic gain control unit; a feedback signal detection unit; a feedback signal combining unit; a feedback signal elimination unit; an automatic delay control unit; and the control unit. According to the RF repeater and repeating method, installation cost is reduced, limitations in output magnitude and installation are overcome, and ensuring high output power characteristics.

Abstract: The present invention relates to a direct methanol fuel cell having reduced methanol crossover. The fuel cell includes a layer of material for controlling the diffusion rate of fuel.

Abstract: The present invention relates to a phase retardation plate including a thin organic film with a phase retardation function due to birefringence and a fixed substrate bonded to at least one surface of the thin organic film using an adhesive, and to an optical pickup device having the phase retardation plate. In the phase retardation plate and the optical pickup device using the same, a liner thermal expansion coefficient (L1) of the thin organic film, a liner thermal expansion coefficient (L2) of the adhesive and a liner thermal expansion coefficient (L3) of the fixed substrate satisfy a relationship of L1>L2>L3; and the thin organic film retards the phase of incident light with a wavelength in a range of 400 to 800 nm by ?/2 or ?, the thin organic film having a phase retardation value between 0 and ?.

Abstract: Disclosed is a prism sheet structure that can control optical coupling between contact surfaces of two prism sheets in a backlight unit. The prism sheet includes: a structural surface (14) having non-planar peaks (11) with maximum height and minimum height along a length direction thereof; and a curved layer (17) having the same cycle as a cycle of height variation of the peak. The curved layer is formed at a boundary surface (16) between the structural surface 14 and the flat surface to maintain the right-angled isosceles triangular prisms formed due to a difference between the highest point and the lowest point of each of the peaks to have a predetermined size, so that distance between the valleys (12) is uniform along the length direction. Although shapes of prisms are identical, the cycle of the peak height variation allows the moiré´ patterns to be suppressed or removed.

Abstract: The present invention provides a polypropylene resin composition prepared by mixing a polypropylene master batch, a high crystalline polypropylene, an ethylene-styrene copolymer rubber, an ethylene-?-olefin rubber and an inorganic filler. The polypropylene resin produced has reduced swirl marks, superior melting tension, fluidity, foaming magnitude, impact resistance, and cooling rate, and is useful for construction of vehicle interior parts.

Abstract: The present invention relates to a phase retardation plate including a thin organic film with a phase retardation function due to birefringence and a fixed substrate bonded to at least one surface of the thin organic film using an adhesive, and to an optical pickup device having the phase retardation plate. In the phase retardation plate and the optical pickup device using the same, a liner thermal expansion coefficient (L1) of the thin organic film, a liner thermal expansion coefficient (L2) of the adhesive and a liner thermal expansion coefficient (L3) of the fixed substrate satisfy a relationship of L1>L2>L3; and the thin organic film retards the phase of incident light with a wavelength in a range of 400 to 800 nm by ?/2 or ?, the thin organic film having a phase retardation value between 0 and ?.

Abstract: Disclosed is a prism sheet structure that can control optical coupling between contact surfaces of two prism sheets in a backlight unit. The prism sheet includes: a structural surface (14) having non-planar peaks (11) with maximum height and minimum height along a length direction thereof; and a curved layer (17) having the same cycle as a cycle of height variation of the peak. The curved layer is formed at a boundary surface (16) between the structural surface 14 and the flat surface to maintain the right-angled isosceles triangular prisms formed due to a difference between the highest point and the lowest point of each of the peaks to have a predetermined size, so that distance between the valleys (12) is uniform along the length direction. Although shapes of prisms are identical, the cycle of the peak height variation allows the moire patterns to be suppressed or removed.

Abstract: An apparatus and method for compressing/decompressing an image in a mobile communication terminal. The apparatus and method compresses or decompresses image data by setting up an optimal threshold. The image compression apparatus and method includes setting initial data of a graphic image to comparison data, determining whether the same data as the comparison data is repeated after the comparison data, determining whether the comparison data is greater than a predetermined threshold, if the same data as the comparison data is not repeated after the comparison data, and storing the comparison data without storing the number of times the comparison data is repeated, if the comparison data is greater than the predetermined threshold.

Abstract: The present invention relates to a direct methanol fuel cell having reduced methanol crossover, which comprises a layer of material for controlling the diffusion rate of fuel. More particularly, it relates to a direct methanol fuel cell in which the material for controlling the diffusion rate of fuel is interposed between an anode and a fuel reservoir or positioned within the fuel reservoir, and thus, the diffusion rate of methanol is reduced even when using high concentration methanol fuel, such that the injected methanol is completely reacted in a catalyst layer so as to fundamentally reduce unreacted methanol, thereby suppressing the methanol crossover phenomenon and exhibiting high power density. In the inventive direct methanol fuel cell, the diffusion rate of fuel is controlled using the fuel diffusion rate-controlling material so as to suppress the methanol crossover phenomenon, thereby increasing energy density and output density.

Abstract: A layer-by-layer etching apparatus and an etching method using a neutral beam which enables to control etching depth to an atomic level by controlling the etching of each atom of a material layer to be etched under precise control of the supply of an etching gas and irradiation of the neutral beam and enables to minimize etching damage. In the layer-by-layer etching method, a substrate to be etched, on which a layer to be etched is exposed, is loaded on a stage in a reaction chamber. An etching gas is supplied into the reaction chamber to adsorb the etching gas on the surface of an exposed portion of the layer to be etched. Excessive etching gas remaining after being adsorbed is removed. A neutral beam is irradiated on the layer to be etched on which the etching gas is adsorbed. Etch by-products generated by the irradiation of the neutral beam is removed.

Abstract: The present invention relates to an optical film for a backlight unit and a method for manufacturing the same. The optical film of the present invention comprises a light diffusion layer in which light diffusing particles are distributed, a first refraction layer which has a relatively low index of refraction and is formed integrally on a top surface of the light diffusion layer, and a second refraction layer which has an index of refraction relatively higher than that of the first refraction layer and is formed integrally on a top surface of the first refraction layer and formed with a refraction pattern on a surface thereof. According to the present invention, the loss of light can be prevented, the adsorption of foreign substances in and the resultant scratch generation on the films can be avoided during the assembly process of the backlight unit, the productivity improvement and manufacturing cost reduction can be achieved, and the brightness of the backlight unit can be adjusted.

Abstract: A layer-by-layer etching apparatus and an etching method using a neutral beam which enables to control etching depth to an atomic level by controlling the etching of each atom of a material layer to be etched under precise control of the supply of an etching gas and irradiation of the neutral beam and enables to minimize etching damage. In the layer-by-layer etching method, a substrate to be etched, on which a layer to be etched is exposed, is loaded on a stage in a reaction chamber. An etching gas is supplied into the reaction chamber to adsorb the etching gas on the surface of an exposed portion of the layer to be etched. Excessive etching gas remaining after being adsorbed is removed. A neutral beam is irradiated on the layer to be etched on which the etching gas is adsorbed. Etch by-products generated by the irradiation of the neutral beam is removed.

Abstract: Disclosed is a method of outputting a list of information stored in a memory of a portable cellular telephone, comprising the steps of: determining if a list key arranged in a key input section of the portable cellular telephone is depressed; and outputting the information stored in the memory in such a fashion that the information is listed when the list key is depressed. The portable cellular telephone for implementing the method according to the present invention provides an advantage that once a user depresses only one list key arranged on the key input section of the portable cellular telephone, as a list of telephone number information is simply and easily outputted in order, thereby offering convenience to the user in use of the portable cellular telephone.

Abstract: A white light-emitting organic electroluminescent element for a backlight and a liquid crystal display device using the same. The white light-emitting organic electroluminescent element is useful for a backlight, in which two or three color light-emitting layers are laminated in the form of a thin film, and the liquid crystal display device reproduces natural color tones, resulting from formation of the element at the rear of a liquid crystal display panel. The white light-emitting organic electroluminescent element comprises an anode; a hole injecting layer; a hole transporting layer; an organic electroluminescent layer consisting of two or three color light-emitting layers and one or more controlling layers, the controlling layer being made of a blocking material for controlling the stream of electrons between the light-emitting layers; an electron transporting layer; and a cathode.

Abstract: An apparatus and method for compressing/decompressing an image in a mobile communication terminal. The apparatus and method compresses or decompresses image data by setting up an optimal threshold. The image compression apparatus and method includes setting initial data of a graphic image to comparison data, determining whether the same data as the comparison data is repeated after the comparison data, determining whether the comparison data is greater than a predetermined threshold, if the same data as the comparison data is not repeated after the comparison data, and storing the comparison data without storing the number of times the comparison data is repeated, if the comparison data is greater than the predetermined threshold.

Abstract: A layer-by-layer etching apparatus and an etching method using a neutral beam which enables to control etching depth to an atomic level by controlling the etching of each atom of a material layer to be etched under precise control of the supply of an etching gas and irradiation of the neutral beam and enables to minimize etching damage. In the layer-by-layer etching method, a substrate to be etched, on which a layer to be etched is exposed, is loaded on a stage in a reaction chamber. An etching gas is supplied into the reaction chamber to adsorb the etching gas on the surface of an exposed portion of the layer to be etched. Excessive etching gas remaining after being adsorbed is removed. A neutral beam is irradiated on the layer to be etched on which the etching gas is adsorbed. Etch by-products generated by the irradiation of the neutral beam is removed.

Abstract: An optical scanning unit with a rotatable hologram disc, including a light source, a rotatable hologram disc provided with a plurality of holograms, the holograms being formed concentrically along a radial direction to diffract a beam emitted from the light source by multiple steps, a reflecting member that reflects the beam emitted from the light source and diffracted by one of the holograms into another hologram, and a fixed hologram correcting the diffracted beam incident through the rotatable hologram disc to focus it on a scanning object. In the optical scanning unit, the light passes through the plurality of holograms formed along a radial direction of the rotatable hologram disc so that a scan width can be extended without reducing a scan speed of the optical scanning unit.

Abstract: Disclosed is a new fluorocystosine and derivatives thereof. The fluorocystosine and derivatives thereof provide a pharmaceutical composition exhibiting better anti-cancer characteristics than the conventional composition.

Abstract: A layer-by-layer etching apparatus and an etching method using a neutral beam which enables to control etching depth to an atomic level by controlling the etching of each atom of a material layer to be etched under precise control of the supply of an etching gas and irradiation of the neutral beam and enables to minimize etching damage. In the layer-by-layer etching method, a substrate to be etched, on which a layer to be etched is exposed, is loaded on a stage in a reaction chamber. An etching gas is supplied into the reaction chamber to adsorb the etching gas on the surface of an exposed portion of the layer to be etched. Excessive etching gas remaining after being adsorbed is removed. A neutral beam is irradiated on the layer to be etched on which the etching gas is adsorbed. Etch by-products generated by the irradiation of the neutral beam is removed.