Abstract: An LCD device comprises: a light irradiating portion; a microlens array having a plurality of microlenses for collecting light emitted from the light irradiating portion; and a liquid crystal panel having a plurality of unit pixels, each unit pixel matching with the plural microlenses, for displaying an image by passing light that has been collected into the microlens array through each unit pixel. According to this, a color degradation is reduced, a viewing angle is increased, a fabrication cost is reduced, and fabrication time is shortened.

Abstract: A variable optical attenuator for optical communications comprises: a substrate on which a plurality of alignment grooves are patterned; an input optical fiber aligned in one of the alignment grooves and receiving an optical signal; a reflector formed on the substrate so as to move to change a path of an optical signal which has passed through the input optical fiber; an output optical fiber aligned in one of the alignment grooves and outputting an optical signal whose path has been changed; a first lens aligned in one of the alignment grooves between the input/output optical fibers and the reflector so as to collimate an optical signal in a direction perpendicular to the substrate; and a second lens patterned on the substrate between the input/output optical fibers and the reflector so as to collimate an optical signal in a direction horizontal to the substrate, thereby facilitating an assembly process, reducing an alignment error, and miniaturizing its entire size.

Abstract: Disclosed is a liquid crystal display (LCD) device comprising: a liquid crystal panel having a black matrix of a grid type; and a trans-reflecting sheet positioned between a backlight source and the liquid crystal panel, for irradiating light generated from the backlight source and reflecting a certain ratio of external light introduced through the liquid crystal panel. The trans-reflecting sheet is fabricated by a micro-machining technique and a semiconductor fabricating process thereby to increase a brightness and a contrast of a liquid crystal screen. According to this, a visibility of an image is increased, a massive fabrication is possible, and a uniform degree between fabricated products is enhanced.

Abstract: A microstructure mold according to the present invention has a self assembled monolayer formed of a surfactant on a surface thereof thereby not to impede a precision of the mold and simultaneously to have a proper releasing performance of a molding as well as to improve corrosion resistance thereof. Furthermore, it is advantageous to dramatically reduce processing costs by maintaining a uniform thickness of the monolayer without using a complex equipment.

Abstract: A micro collimating lens system for optical communication includes: an optical fiber aligned on a silicon substrate in a certain direction for transmitting an optical signal; and at least two lenses aligned on the silicon substrate in order that the optical signal can be collimated at multiple stages, so that efficiency in assembling the lens system for collimating the optical signal is improved and a fabrication cost is reduced.

Abstract: The present invention discloses a microlens array sheet of a projection screen including a lens sheet having a predetermined area, microlenses arranged on one surface of the lens sheet in the horizontal and vertical directions, a black matrix including apertures corresponding to the microlenses, and being adhered to the other surface of the lens sheet, an optical diffusing layer formed on the lens sheet to cover the black matrix, for widening a viewing angle, and a protecting film for protecting the optical diffusing layer. The microlens array sheet of the projection screen is manufactured by using a process for manufacturing a semiconductor device, a reflow process and a plating process for a mold, thereby improving luminance and definition of the projection screen at a low unit cost of production.

Abstract: Device and method for removing contaminant particles from an optical disk, the optical disk having an optical disk substrate, a reflective layer on the disk substrate, a first insulating layer on the reflective layer, a recording layer on the first insulating layer for recording/reproducing a data thereon/therefrom, and a second insulating layer on the recording layer, the device including an electrode pattern of a plurality of concentric circles on the optical disk except the recording layer, a third insulating layer on the electrode pattern to expose a region of the electrode pattern, and a number of connection electrodes in contact with the exposed electrode pattern for applying dust collecting voltages to the electrode pattern.

Abstract: Provided are a thin film bulk acoustic resonator consisting of a single chip for minimizing phase noise by controlling resonance frequency and a voltage controlled oscillator using the same. The thin film bulk acoustic resonator comprises: a fixed body having a first electrode; a driving body having a second electrode installed to be adjacent to the fixed body and moved toward the fixed body due to voltage applied to the first and second electrodes; and a thin film bulk acoustic resonator for controlling the resonance frequency according to change of stress generated due to the movement of the driving body.

Abstract: Disclosed are an optical recording reproducing apparatus which can effectively remove contamination material attached thereto and an optical recording medium used in the optical recording reproducing apparatus. To this end, the apparatus comprises: a catalyst layer formed at a specific part thereof; and a light irradiation unit for irradiating light on the catalyst layer. An optical disc used in an optical recording reproducing apparatus includes a catalyst layer.

Abstract: Disclosed are a micro-actuator, a fabrication method thereof, and a micro-actuating valve.

Abstract: A flow control valve apparatus, a manufacturing method thereof and a heat exchanger using the same. The flow control valve apparatus includes: a flow channel having a longitudinal axis comprised of an upper flow channel and a lower flow channel, for guiding a fluid; sealing means installed in a plane perpendicular to the flow channel and having an orifice through which the fluid passes; opening/closing means for controlling opening/closing of the orifice; and applying means installed along an outer circumference of the flow channel and to which a current may be applied for controlling the opening/closing of the orifice. According to the inventive flow control valve apparatus, the displacement of the permanent magnet valve member is varied using the current applied to the solenoid coil, thereby linearly controlling the opened area of the orifice and/or performing the opening/closing operation of the orifice. The valve apparatus can be miniaturized at a low price.

Abstract: In an optical pickup head of an optical recording reproducing apparatus, a fabrication method thereof, a lubricant-coated optical pickup head of an optical recording reproducing apparatus and a method for coating lubricant onto an optical pickup head, by using a MEMS (micro electro mechanical system) technique used for designing, fabricating and application of a microstructure, it is possible to miniaturize an optical pickup head of an optical recording reproducing apparatus and reduce a fabrication cost thereof.

Abstract: Disclosed are a light emitting module, an optical detecting module, an optical pickup apparatus formed by coupling the ultra-minimized light emitting module and the optical detecting module, and manufacturing methods thereof. To this end, ultra-minimization, a micro machining technique fit to a mass production, and a semiconductor device assembly manufacturing process are applied, thereby reducing a component cost and increasing uniformity of components.

Abstract: An optical resonator comprises: a transparent lower substrate for light penetration; a plane mirror formed at one surface of the lower substrate; an upper substrate coupled to the lower substrate with a certain gap; a concave mirror formed at one surface of the upper substrate for forming a resonance cavity of a hemispherical shape with the plane mirror; and a micro actuating means for controlling a gap of the resonance cavity. Disclosed are the micro optical resonator capable of minimizing an insertion loss due to an alignment error of an optical fiber system and tuning a wavelength of a output optical signal so as to efficiently obtain an output optical signal having a predetermined narrow bandwidth from an input optical signal having a broad bandwidth, a fabrication method of a micro concave mirror thereof, and an optical filter using the same.

Abstract: An optical fiber coupling system includes: a substrate having a predetermined area; a laser beam emitting unit attached at one side of the substrate and emitting beam; a first fine lens insertedly fixed at a first mounting groove formed on the substrate and focusing or collimating vertical beam oscillated from the light radiating unit; second fine lenses protrusively formed on the substrate and focusing or collimating horizontal beam oscillated from the light radiating unit; and a beam output unit insertedly fixed to a second mounting groove formed on the substrate and outputting beam focused or collimated by the first and second fine lenses. An alignment error of an optical system is reduced, a beam focusing degree is heightened. In addition, the optical fiber coupling system can be made compact and available for mass-production.

Abstract: An optical receiver and an optical transmitter and a producing method thereof using a variable optical attenuator includes a base member formed in a predetermined shape; an input optical fiber emitting an optical signal toward the base member; an optical receiving means provided at one side of the base member, and receiving an optical signal; and a variable optical attenuator actuated by an electrostatic force, changing a path of laser emitted from the input optical fiber, and thus adjusting optical power made to be incident to the optical receiving means. Positions of the input optical fiber and the optical receiving means can be changed, and the variable optical attenuator can be produced by a MEMS technology so that the variable optical attenuator can be produced with a low unit price, actuated with small electric power, and can transmit an accurate optical signal.

Abstract: In an optical switch including an input block in which light is incident; an output block for transferring input light from the input block; and a reflector for performing a switching operation by reflecting input light from the input block, wherein the input block and the output block are arranged so as to make input light from the input block and reflected light reflected on the reflector and transferred to the output block have an acute angle less than 90 degrees, and accordingly an optical switch capable of simplifying an assembly process and a package process and reducing a size of an optical switch package can be provided.

Abstract: Disclosed is an appearance processing method comprising: designing a reference appearance for designing a set shape as a theoretical value; producing a specimen; comparing the reference appearance with the specimen and thus setting a deviation region; performing ion beam milling for milling the deviation region of the specimen by ion beam; and comparing the milling-processed specimen with the reference appearance after the ion beam milling thus to obtain a deviation and milling the deviation region repeatedly thus to make the specimen consist with the reference appearance. Accordingly, an arbitrary shape, a minute spherical surface, or an aspheric shape can be precisely processed, and a large quantity of fabrication by a uniform processing precision is possible.

Abstract: A micro-actuator, its manufacturing method, an optical pickup head of an optical recording/reproducing apparatus having the micro-actuator, and its manufacturing method are disclosed. A low voltage and low power bi-directional driving is accomplished so that a size and a weight of a system can be considerably reduced and a response speed can be improved. A uniformity and a production efficiency are heightened by reducing a alignment tolerance. In addition, a configuration tolerance caused due to an uneven thickness of a protection layer of the record layer on the disk and an uneven smoothness of the disk is corrected, so that a focal point of an objective lens can be optimally made on a record layer of the disk.

Abstract: Disclosed is an optical switch enabling to be advantageous in cost, performance, size, weight, and fabricating process as well as carry out a switching function with a low driving voltage. The present invention includes a substrate, an input optical fiber over the substrate for incidence of an optical signal, at least one output optical fiber over the substrate for projection of the optical signal, and a micro-prism over the substrate for switching a projection path of the optical signal incident on the input optical fiber.