Abstract: A developing-transferring module includes a sub frame which is detachably mounted to a main frame, a plurality of photosensitive units which are disposed inside the sub frame with a predetermined interval and includes a photosensitive body to which a developer is attached, and a intermediate transferring unit which are provided inside the sub frame disposed opposite the plurality of photosensitive units so that the developer of the photosensitive units can be primarily transferred thereto and secondarily transfers the primarily transferred developer to a record medium of the main frame.

Abstract: Batch-type deposition apparatus having a gland portion are provided. The apparatus include a reaction furnace, a gas nozzle located in the reaction furnace, a gas supply conduit located outside the reaction furnace and a gland portion for connecting the gas nozzle to the gas supply conduit. The gland portion includes a gas nozzle end extended from the gas nozzle toward an outside region of the reaction furnace and a gas supply conduit end extended from the gas supply conduit. The gas nozzle end is connected to the gas supply conduit end through a buffer member. The buffer member has an inclined inner wall for connecting an inner wall of the gas nozzle end to that of the gas supply conduit end.

Abstract: A color image forming system including a photosensitive drum, a charger which charges the photosensitive drum, and a laser scanning unit which is installed below the photosensitive drum and radiates light onto the charged photosensitive drum, to form an electrostatic latent image. The system further includes a plurality of developing units with toner of at least four colors such as yellow, magenta, cyan, and black, arranged at different heights along the outer surface of the photosensitive drum to develop the electrostatic latent image with the toner when a developing roller installed in each of the developing units is maintained at a developing gap with the photosensitive drum. A transfer unit transfers the developed image onto a piece of paper, and a fusing unit is installed above the photosensitive drum and fuses the transferred image onto the piece of paper. The developing units may be arranged in the order of magenta, cyan, yellow, and black.

Abstract: Disclosed is an LED device, a method for manufacturing the same, and a light emitting apparatus having the same. The LED device includes (a) a light emitting diode unit and (b) an adjustment layer laminated on a light emitting surface of the light emitting diode unit, a fine pattern having being formed on the adjustment layer by repeating a shape in a light emission direction. The adjustment layer is (i) at least one layer formed by aligning transparency adjustment particles having a shape or (ii) a polymer film layer having a fine pattern imprinted on the polymer film layer so as to adjust transparency. A fine pattern adjustment layer having various shapes and an adjustable size is introduced on the light emitting surface of the LED unit. As a result, the light extraction efficiency of the surface of the LED unit improves together with ease of manufacturing and secured uniformity.

Abstract: A color image forming system including a photosensitive drum, a charger which charges the photosensitive drum, and a laser scanning unit which is installed below the photosensitive drum and radiates light onto the charged photosensitive drum, to form an electrostatic latent image. The system further includes a plurality of developing units with toner of at least four colors such as yellow, magenta, cyan, and black, arranged at different heights along the outer surface of the photosensitive drum to develop the electrostatic latent image with the toner when a developing roller installed in each of the developing units is maintained at a developing gap with the photosensitive drum. A transfer unit transfers the developed image onto a piece of paper, and a fusing unit is installed above the photosensitive drum and fuses the transferred image onto the piece of paper. The developing units may be arranged in the order of magenta, cyan, yellow, and black.

Abstract: Batch-type deposition apparatus having a gland portion are provided. The apparatus include a reaction furnace, a gas nozzle located in the reaction furnace, a gas supply conduit located outside the reaction furnace and a gland portion for connecting the gas nozzle to the gas supply conduit. The gland portion includes a gas nozzle end extended from the gas nozzle toward an outside region of the reaction furnace and a gas supply conduit end extended from the gas supply conduit. The gas nozzle end is connected to the gas supply conduit end through a buffer member. The buffer member has an inclined inner wall for connecting an inner wall of the gas nozzle end to that of the gas supply conduit end.

Abstract: A color image forming apparatus includes a photoreceptor medium, an exposing unit, a plurality of developer units, and a power supply. The exposing unit scans light onto the photoreceptor drum to form a latent electrostatic image. The plurality of developer units include developer rollers supplying toner to the latent electrostatic image to develop the latent electrostatic image into a toner image. Each developer unit contains toner of a different color, and the developer units are arranged around the photoreceptor medium so that the developer rollers are separated by a development gap from the photoreceptor medium. The power supply selectively applies a first bias allowing toner to be supplied through the development gap to the photoreceptor medium on which the latent electrostatic image is formed and a second bias preventing toner from passing through the development gap.

Abstract: A laser scanning unit and an electrophotographic image forming apparatus adopting the same include a plurality of photogenerators emitting parallel lights, a plurality of rotatable polygonal mirrors which deflect the lights emitted from the photogenerators in a main scanning direction having a range of a predetermined angle to scan the lights onto photosensitive media proceeding in a sub scanning direction, the rotatable polygonal mirrors stacked on a driving unit to match corresponding ones of the photogenerators and coupled with a rotation shaft of the driving unit to rotate therewith, a plurality of first lenses which are installed in light paths between the photogenerators and the rotatable polygonal mirrors, respectively, and collect the lights in the sub scanning direction, and a plurality of second lenses which collect the lights deflected by the rotatable polygonal mirrors on corresponding ones of the photosensitive media.

Abstract: A color image forming apparatus includes a photoreceptor medium, an exposing unit, a plurality of developer units, and a power supply. The exposing unit scans light onto the photoreceptor drum to form a latent electrostatic image. The plurality of developer units include developer rollers supplying toner to the latent electrostatic image to develop the latent electrostatic image into a toner image. Each developer unit contains toner of a different color, and the developer units are arranged around the photoreceptor medium so that the developer rollers are separated by a development gap from the photoreceptor medium. The power supply selectively applies a first bias allowing toner to be supplied through the development gap to the photoreceptor medium on which the latent electrostatic image is formed and a second bias preventing toner from passing through the development gap.

Abstract: A laser scanning unit and an electrophotographic image forming apparatus adopting the same include a plurality of photogenerators emitting parallel lights, a plurality of rotatable polygonal mirrors which deflect the lights emitted from the photogenerators in a main scanning direction having a range of a predetermined angle to scan the lights onto photosensitive media proceeding in a sub scanning direction, the rotatable polygonal mirrors stacked on a driving unit to match corresponding ones of the photogenerators and coupled with a rotation shaft of the driving unit to rotate therewith, a plurality of first lenses which are installed in light paths between the photogenerators and the rotatable polygonal mirrors, respectively, and collect the lights in the sub scanning direction, and a plurality of second lenses which collect the lights deflected by the rotatable polygonal mirrors on corresponding ones of the photosensitive media.

Abstract: A color image forming system including a photosensitive drum, a charger which charges the photosensitive drum, and a laser scanning unit which is installed below the photosensitive drum and radiates light onto the charged photosensitive drum, to form an electrostatic latent image. The system further includes a plurality of developing units with toner of at least four colors such as yellow, magenta, cyan, and black, arranged at different heights along the outer surface of the photosensitive drum to develop the electrostatic latent image with the toner when a developing roller installed in each of the developing units is maintained at a developing gap with the photosensitive drum. A transfer unit transfers the developed image onto a piece of paper, and a fusing unit is installed above the photosensitive drum and fuses the transferred image onto the piece of paper. The developing units may be arranged in the order of magenta, cyan, yellow, and black.

Abstract: A connector-type optical transceiver includes optical devices, a silicon-on-insulator (SOI) optical waveguide and a silicon bench whose upper surface is provided with a U-shaped recesses for receiving the optical devices and the SOI optical waveguide, while being aligned to form optical paths. The SOI optical waveguide includes a silicon substrate, a single crystalline silicon layer whose upper surface is provided with waveguide portions, and a silica thin layer interposed between the silicon substrate and the single crystalline silicon layer to prevent light passing through the waveguide portions from being diffused. The silicon bench has v-shaped grooves extending longitudinally along the silicon bench and receives guide pins adapted to guide an external connecting terminal to be connected to the silicon bench.

Abstract: A jig for the batch production of optical communication apparatuses includes a jig body whose upper surface is provided with a plurality of U-shaped recesses arranged in a matrix array to receive silicon bases each carrying optical devices and a plurality of vacuum holes vertically formed through the jig body, to communication with the respective bottom surfaces of the U-shaped recesses. The silicon bases received by the U-shaped recesses are held onto the bottom surfaces thereof when a vacuum is applied thereto through the vacuum holes. A method using the jig enables batch production by simultaneously processing many silicon bases.

Abstract: A finite impulse response (FIR) filter for wave-shaping digital quadrature amplitude modulation (QAM) symbols is disclosed, in which multipliers are replaced with multiplexers, the replaced multiplexers are utilized to receive the symbols directly from a symbol encoder without zero (0) interpolations, and the critical path is reduced by shifting the position of a delay device. The filter includes a first FIR means for delaying the externally inputted symbol data, and for utilizing the delayed symbol data as selection signals to sum up the selected multiplication product (selected from among products obtained by multiplying the symbol values by a pre-set filter tab coefficient) and the selected value selected by a first multiplexing means. A second FIR means delays again the delayed symbol data of the first FIR means, and utilizes the delayed symbol data as selection signals to sum up the selected multiplication product and the output value of the first FIR means.

Abstract: An image forming device and a paper transporting method are capable of improving a paper transporting path by establishing a transfer drum, a developing unit, an optical unit and a paper feeding unit in four quadrant directions centering around a photosensitive drum unit, Thereby, the optical unit is protected from mechanical shock or vibration. Jamming of paper adhered to the transfer drum is easily rectified, and the overall structure of the device is simplified.

Abstract: An optical scanning apparatus for scanning a light beam as a spot image on an image-forming plane apart from a light source, or reversely, for optically reading the graphic image of an object, in which stable high-resolution scanning is embodied. The apparatus includes a light source for providing a collimated beam, a cylindrical lens for linear focusing of the beam in a subscanning direction, a deflector for deflecting the beam in the main scanning direction, plastic toroidal lenses for image-forming the deflected beam and for focusing it to form a spot image, so that the three toroidal lenses have a small F.sub.No and compensate for the tilted mirror surface of the deflector, and allows stable scanning with high resolution that produces high-quality images in optical apparatus such as laser printers and facsimile machines.

Abstract: An image forming apparatus includes a plurality of image forming units each having a photoconductive drum for forming a latent image and a developing device for developing the latent image, for providing different-color developed images, an exposing device for projecting light according to image information, and a plurality of mirror members for controlling the optical passage of the exposing device so as to expose a selected photoconductive drum without shifting the exposing device, thereby simplifying the apparatus and allowing for a stable drive.

Abstract: An image forming apparatus includes a plurality of image forming units having a photoconductive device for forming a latent image and a developing device for developing the latent image, an exposing device for exposing the photoconductive device, and a transfer device for transferring the image developed on the photoconductive device onto a sheet of paper. The apparatus is compact and performs a stable driving because the light and small exposing device and transfer device move with respect to the plurality of image forming units, thereby providing a good-quality image and facilitating the maintenance of the apparatus.

Abstract: An image forming apparatus includes a plurality of image forming units having photoconductive devices for forming a latent image and developing devices for developing the latent image, an exposing device for selectively moving to and exposing the respective photoconductive devices, an endless transfer belt for conveying a sheet of paper with respect to the photoconductive devices, and transfer chargers. The apparatus is compact because only the light and small exposing device shifts, thereby enhancing picture quality and performing high-speed printing in stable driving.

Abstract: In an image forming apparatus, a photosensitive drum, laser scanning unit, developing unit, and transfer unit are installed in a housing separate from a main body and a buffer between and connected to the housing and the main body for absorbing vibration.