Patent application number | Description | Published |
20080218022 | Motor - A motor that reduces a cogging torque and rotates at a high speed is presented. The motor comprises: a shaft, a plurality of core blocks coupled to the shaft, a plurality of permanent magnets inserted into each of the core blocks, and an aligning unit, coaxial with the shaft, and disposed between the shaft and the core blocks. The core block includes a plurality of core sheets each having at least a pair of flux barriers formed to be symmetrical to each other about a line of symmetry. A first rib lies along the line of symmetry and a separate anti-deformation rib is positioned within each of the pair of flux barriers. Accordingly, a skew process for a rotor is facilitated. An anti-deformation rib within the flux barrier provides structural integrity for the core block. Accordingly, when the rotor is rotated with a high speed, a bridge is prevented from being deformed. | 09-11-2008 |
20080218025 | Self-magnetizing motor and compressor having the same - A self magnetizing motor and a compressor having the same is configured to require a lower starting voltage and to deliver superior performance. In the self magnetizing motor, a magnetic material on an exterior of the rotor is magnetized when power is supplied to a magnetizing unit of the stator. A plurality of conductive bars are inserted on the outer circumference of the rotor core. A spacing distance between outer portions of the conductive bars and inner circumference of the magnetizable material is longer than an air gap between the stator and the rotor. As a result, a magnetic strength of the magnetic material may be increased. | 09-11-2008 |
20080278108 | MOTOR AND METHOD FOR CONTROLLING OPERATION OF MOTOR - A self-magnetizing motor incorporates a control circuit that starts the motor, controls a magnetizing unit, and then operates the motor. The control circuit can include relay, such as a bi-directional conductive power semiconductor device, and one or more PTC (Positive Temperature Coefficient) switches. This control circuit eliminates the need for a separate controller and the implementation costs can be reduced. | 11-13-2008 |
20080290824 | APPARATUS AND METHOD FOR CONTROLLING OPERATION OF MOTOR - An apparatus for controlling a motor includes an inverter to convert a DC voltage into an AC voltage, a power selecting circuit to select external power or power from the inverter, and a controller to control operation of the power selecting circuit according to a load of the motor. | 11-27-2008 |
20090053153 | Polymer composite particles containing sunscreen agent and manufacturing method thereof - The present invention relates to polymer composite particles containing a sunscreen agent and a manufacturing method thereof, and more particularly, to circular-shaped polymer composite particles which are a hybrid of circular-shaped polymer particles and a sunscreen agent, drastically improve dispersion stability of particles themselves, provide excellent ultraviolet absorption performance and are applicable to cosmetics, and a manufacturing method thereof. | 02-26-2009 |
20090100462 | VIDEO BROWSING BASED ON THUMBNAIL IMAGE - Provided is video browsing based on a thumbnail image. When video data is selected on the basis of a representative image, thumbnail images generated from the selected video data are continuously displayed. The thumbnail images are sequentially displayed with a set time interval on a window on which the representative image is displayed. The thumbnail images can be enlarged and continuously displayed. Contents of a corresponding video can be recognized in a summarized form using the continuously displayed thumbnail images. | 04-16-2009 |
20090259839 | SECURITY AUTHENTICATION SYSTEM AND METHOD - Authentication system and method are provided. The authentication system includes: a server configured to provide at least two security levels and configured to transmit one of at least two security modules corresponding to the security level of a user terminal, via communications network, to the user terminal based, at least in part, upon an environment of the user terminal; and an authentication server communicatively linked with the server and configured to perform a user authentication in response to a user authentication request from the user terminal. Accordingly, various hackings can be prevented and the user authentication can be accomplished with user's convenience and security. | 10-15-2009 |
20090262694 | APPARATUS AND METHOD FOR PRECODING BY MIDAMBLE IN MULTIPLE INPUT MULTIPLE OUTPUT WIRELESS COMMUNICATION SYSTEM - A method and apparatus for performing codebook-based precoding in a Multiple Input Multiple Output (MIMO) wireless communication system are provided. In a method for operating a Base Station (BS) in a MIMO wireless communication system, a reference signal including pilot signals, which are divided by a predefined number of bands and are multiplied by respective codes in a codebook, is transmitted. One or more Mobile Stations (MSs) destined for spatial multiple access are selected using an index of a band and CQI of the band corresponding to the index, which are fed back from one or more MSs. A precoding matrix is generated to process data streams of the selected one or more MSs. | 10-22-2009 |
20100113077 | APPARATUS AND METHOD FOR UPLINK POWER CONTROL IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method for controlling a transmit power of a sounding signal in a wireless communication system are provided. The method includes estimating a downlink Carrier to Interference and Noise Ratio (CINR) using at least one signal received from a Base Station (BS), determining a transmit power level for a sounding signal using a target CINR for the sounding signal, wherein the target CINR is determined based on the downlink CINR and multi-target CINR information, and transmitting the sounding signal according to the transmit power level. | 05-06-2010 |
20100254487 | Apparatus and method for determining optimum integer perturbation vector of low complexity in multiple antenna system - An apparatus and a method for determining an optimum integer perturbation vector of a low complexity in a multiple antenna system include a transmitter that transmits data using an optimum integer perturbation vector of a low complexity in a multiple antenna system includes a module pre-processor, a shift pre-processor, and a precoder. The modulo pre-processor adds an integer perturbation vector to a transmission signal vector. The shift pre-processor phase-shifts a pseudo inverse matrix of a channel matrix using a phase angle. The precoder precodes a transmission signal vector perturbed by the integer perturbation vector using the phase-shifted pseudo inverse matrix of the channel matrix. | 10-07-2010 |
20110177837 | Apparatus and method for controlling transmission power in wireless communication system - An apparatus and method controls transmission power by a Base Station (BS) of a wireless communication system by considering a path loss between the BS and a terminal and interference affecting adjacent cells. A receiver receives information about interference from adjacent BSs and a terminal. A calculator calculates transmission power of the terminal using the information about interference received from the adjacent BSs and the terminal. The information about interference received from the adjacent BSs comprises Noise & Interference (NI) values, and the information about interference received from the terminal includes a path loss value. | 07-21-2011 |
20110188388 | User equipment scheduling method in cellular uplink communication system and base station apparatus therefor - A method and an apparatus maximize the capacity of a wireless communication network by taking into consideration inter-cell interference coordination. A home cell's capacity sensitivity to interference is calculated. At least one neighbor cell's capacity sensitivity to interference is collected. And at least one UE located in the home cell is scheduled based on the home cell's capacity sensitivity and the neighbor cell's capacity sensitivity. Accordingly, it is possible to achieve power and allocation control to maximize the capacity of the overall network including neighbor cells increase the system capacity in a cellular system in which inter-cell interference is large, and adaptively perform a UE scheduling in real time to changing distribution of UEs because information on a change in the capacity of each cell is shared by periods. | 08-04-2011 |
20120082708 | NOVEL METHOD FOR PREPARING COMPOSITE PARTICLE COMPRISING SURFACE TREATMENT LAYER OF SUNSCREENING AGENT FORMED THEREON - The present invention relates to a method of preparing a composite powder comprising a surface treatment layer of sunscreen. The present invention prepares a composite powder comprising a surface treatment layer of sunscreen by a dry process that does not require separate dehydration and drying processes, and thus, the prepared composite powder may be uniformly surface-treated with more quantities of sunscreens compared to a composite powder comprising a surface treatment layer of sunscreen prepared by a conventional wet process, may exhibit remarkably improved sun screen effect, and be useful for a cosmetic composition. | 04-05-2012 |
20120319782 | CLASS E POWER AMPLIFIER - The present invention includes a class-E power amplifier, comprising a driver stage (DS) including a first power amplifier with transistors, to which an input signal is inputted; a main stage (MS), including a second power amplifier with transistors, whose input is connected to the output of the DS; and a first LC resonator whose one end is connected to the output of the DS and the other end to the ground as an AC equivalent circuit and a second LC resonator whose one end is connected to the input of the MS and the other end to the ground as an AC equivalent circuit. In accordance with the present invention, as the voltage stress is reduced on the CMOS class-E power amplifier, the application of the high power supply voltage may be allowed and therefore the load impedance may be high while the same efficiency is maintained. | 12-20-2012 |
20130330368 | EYE DROP COMPOSITION FOR PREVENTION AND TREATMENT OF OPHTHALMIC DISEASES CONTAINING FUSION PROTEIN OF FK506 BINDING PROTEIN - Disclosed is a treatment for ophthalmic diseases, more specifically, a pharmaceutical composition for treating ophthalmic diseases including a fusion protein of FK506 binding protein capable of penetrating into the ocular tissue as an active ingredient. | 12-12-2013 |
20140120030 | CARBON MATERIALS BASED ON ORGANIC NANOFILM USING THERMAL EVAPORATION AND METHOD FOR PREPARING THE SAME - Provided is a method for preparing a carbon material based on an organic nanofilm using thermal evaporation, including: depositing a liquid polymer or polymer solution containing a polymer and a solvent onto a substrate, thereby forming an organic nanofilm; stabilizing the organic nanofilm so that the carbon atoms in the organic nanofilm have a cyclic arrangement; and carbonizing the stabilized organic nanofilm, thereby forming a carbon material, wherein the organic nanofilm is formed from the liquid polymer or polymer solution through a thermal evaporation process. The method provides a carbon material with a thickness, sheet resistance and surface roughness suitable for various applications and allows control thereof. In addition, the method uses a relatively inexpensive starting material, pitch, thereby reducing the overall production cost, and avoids a need for a complicated additional patterning operation, so that the carbon material is applied directly to electronic devices. | 05-01-2014 |
20140348885 | MASS PREPARATION METHOD FOR SPHERICAL NATURAL COLOR WAX BEADS - This invention relates to a mass preparation method of spherical natural color wax beads and according to the invention, the beads have a higher specific gravity than water so that the beads do not flow into the sea and they are biodegradable to fundamentally remarkably reduce marine ecosystem contamination, and it enables mass preparation by significantly improving the previous preparation of spherical natural color wax beads which had difficulties in their mass preparation while using expensive equipment. | 11-27-2014 |