Abstract: A stator coil of a slotless motor is disclosed in which the stator coil is formed in such a manner that respective both distal ends of two unit coil bodies, each unit coil body arranged to face each other, are respectively coupled to form a plurality of circular coil bodies, each circular coil body having a different inner diameter, and a circular coil body having a smaller inner diameter is sequentially inserted into an inner side of a circular coil body having a larger inner diameter, whereby a horizontal width of the plurality of unit coil bodies of U, V and W phases is equal there among to cause the strength of the magnetic field of U, V and W phases to be equal, and to allow the stator to be accurately manufactured, thereby catering to a designer's intention and markedly simplifying the assembly processes.

Abstract: An organic light emitting device having a photonic crystal structure and a manufacturing method thereof are provided. The organic light emitting device comprises: a substrate through which light passes; a photonic crystal layer formed on the substrate and having a photonic crystal structure; an intermediate layer formed on the photonic crystal layer and having a large refractive index compared with the photonic crystal layer; a first electrode layer formed on the intermediate layer; a light emitting layer formed on the first electrode layer and emitting light according to current flow; and a second electrode layer formed on the light emitting layer.

Abstract: A claw-pole PM stepping motor includes a module that is formed in such a manner that a first driving unit and a second driving unit are symmetrically arranged with respect to a first claw-pole and a second claw-pole each oppositely disposed at a main yoke member internally disposed to substantially divide an inside of a housing, an inner portion of which is rotatably inserted and supported by a rotary shaft, and the first driving unit and the second driving unit have magnet rotors coaxially arranged to generate electromagnetic force; sub-yoke members; and coil bobbins. The claw-pole PM stepping motor is exempted from a structure where coil bobbins are concentrically arranged at a periphery of magnet rotors, and instead the coil bobbins are coaxially arranged and shifted from each other from the corresponding magnet rotors, such that a miniaturized motor with a reduced outer diameter can be embodied.

Abstract: A transmission power control system and method is provided that controls the magnitude of transmission power in proportion to the distance between a base station and a mobile station. The transmission power control system provides the exact transmission power by compensating for an error between a real gain and a gain controlled value according to the magnitude of the transmission power. The transmission power control system can be used, for example, in a mobile phone. The transmission power control system can include a transmission part, a mobile station modem, a power detector, a gain difference controlling part and a power amplifier controlling part. The transmission part outputs a transmission power signal in accordance with input signals. The power detector transforms the transmission power signal into a DC voltage. The mobile station modem outputs a first and second gain control values, respectively, based on the DC voltage.

Abstract: A lead forming apparatus and a method for removing tin dust from the surface of the outer leads of semiconductor package are disclosed. The apparatus, in which a brushing operation removes tin dust from the outer leads, includes a supplier part; a lead forming part; a collection part; an intermediate post; a package transportation part; a brush block; and a brush transportation part. The method includes steps of providing a leadframe, forming the package leads, removing tin dust from the leads, and collecting the packages in a container.

Abstract: A lead frame unloading apparatus includes a pair of opposing plate members, one of which has a long horizontal slit. The opposing plate members define a central space where one or more sliding blocks are located, each of the sliding blocks having a vertical through hole at its center. A picker penetrates through the vertical hole within each respective sliding block, each picker is immobilized when it contacts a lead frame for pickup thereby allowing the sliding block to move vertically up and down on the immobilized pickers, each of the pickers having a vacuum suction device at one end thereof, and a vacuum screw at the other end thereof. The vacuum screw has a hollow projection connected to a vacuum supplier. A spring is disposed beneath respective of the one or more sliding blocks, with the spring being fitted to an outside of the vacuum suction device. Spring stoppers support the springs and fastening devices fasten the one or more sliding blocks to the opposing plate members.