Patent application number | Description | Published |
20110060254 | PORTABLE PHYSIS-STIMULATING DEVICE FOR PROMOTING GROWTH WITH TWO-PHASE ULTRASONIC VIBRATION GENERATORS AND LED ELEMENTS - Disclosed herein is a growth plate stimulation-type portable growth promotion apparatus including two-phase ultrasonic vibration generators and Light Emitting Diode (LED) devices. The ring-shaped two-phase ultrasonic vibration generators have a center hole. Each of the LED devices is provided in the center hole of the each two-phase ultrasonic vibration generator. The two-phase ultrasonic vibration generators includes a ring-shaped vibration stator configured to have a center hole; a first electrode layer provided under the vibration stator; a second electrode layer provided under the first electrode layer; and a piezoelectric ceramic group layer configured to include a first piezoelectric ceramic group for generating an A phase and a second piezoelectric ceramic group for generating a B phase. Growth plates are stimulated using two-phase ultrasound projected from the two-phase ultrasonic vibration generators and light projected from the LED devices. | 03-10-2011 |
20120161847 | SWITCHING DEVICE AND METHOD FOR PREVENTING MALFUNCTION OF THE SAME - The present invention provides a switching device and a method for preventing malfunction of the same. The switching device includes: a controller for outputting a plurality of digital control signals; a protecting unit connected to the controller for protecting all signals when the plurality of digital control signals outputted from the controller are simultaneously received at a state of ON; a gate driver connected to the protecting unit for generating a switch control signal by converting the control signal passed through the protecting unit; and a plurality of switches connected to the gate driver for individually performing ON•OFF operations according to each of the switching control signals. | 06-28-2012 |
20130094267 | EVEN-LEVEL INVERTER - There is provided an even-level inverter, including: a voltage-dividing circuit dividing input DC power into an even number of voltage levels; a plurality of switching devices connected to individual nodes of the voltage-dividing circuit having the even number of voltage levels; and a bidirectional switching device connected to the individual nodes of the voltage-dividing circuit through at least one of the plurality of switching devices and including at least two transistors. According to the present invention, the bidirectional switching device is implemented without a diode to thereby reduce conduction loss caused due to an anti-parallel diode included in the related art bidirectional switching device, and a neutral point of the voltage-dividing circuit is electrically separated from the switching devices to thereby control reactive power. | 04-18-2013 |
20130116621 | BACTERIUM-BASED MICROROBOT INCLUDING MAGNETIC PARTICLES - Provided is a bacterium-based microrobot, wherein bacteria are attached to a part of a surface of a microstructure including at least one or more magnetic particle, for actuating a bacterium-based microrobot more effectively. | 05-09-2013 |
20130286699 | POWER SUPPLYING APPARATUS, METHOD OF OPERATING THE SAME, AND SOLAR POWER GENERATION SYSTEM INCLUDING THE SAME - There are provided a power supplying apparatus, a method of operating the same, and a solar power generation system including the same. The power supplying apparatus includes: a power supply unit generating a direct current (DC) input signal; a main circuit unit including a plurality of flyback converter circuits connected to the power supply unit to generate a DC output signal; and a control circuit unit controlling an operation of the main circuit unit, wherein the control circuit unit connects the plurality of flyback converter circuits to each other in series or in parallel according to a level of the DC input signal. Therefore, even in the case in which the level of the DC input signal is high, a circuit maybe configured using a circuit device having a low withstand voltage range and damage and deterioration of the circuit device may be prevented. | 10-31-2013 |
20140003093 | MULTI-LEVEL CONVERTER, AND INVERTER HAVING THE SAME AND SOLAR POWER SUPPLY APPARATUS HAVING THE SAME | 01-02-2014 |
20140003108 | MULTI-LEVEL CONVERTER, AND INVERTER HAVING THE SAME AND SOLAR POWER SUPPLY APPARATUS HAVING THE SAME | 01-02-2014 |
20140037553 | BACTERIUM-BASED MICROROBOT CAPABLE OF TARGETING CANCER TISSUE - To provide a bacterium-based microrobot which can be specifically targeted to cancer in vivo, the present invention provides a drug delivery system for cancer tissue, comprising a bacterium, and a microbead encapsulated with at least one drug, wherein biotin is bound to a surface of the bacterium and a surface of the microbead is coated with streptavidin. | 02-06-2014 |
20140198547 | MULTILEVEL INVERTER - There is provided a multilevel inverter capable of easily perform balancing of voltages by way of controlling switching of voltage dividing based on an offset between voltages divided by capacitors of a voltage dividing circuit. The multilevel inverter includes: a voltage dividing unit including a plurality of capacitors for dividing an input direct current (DC) voltage; an inverter unit switching the divided DC voltages to output a predetermined alternating current (AC) voltage; and a control unit providing a control signal for controlling switching of the inverter unit based on an offset between the voltages divided by the plurality of capacitors. | 07-17-2014 |