Moon, Gwangju
Byongkwon Moon, Gwangju KR
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20110106915 | CHANNEL SERVER, CHANNEL PREDICTION SERVER, TERMINAL, AND METHOD FOR FAST CHANNEL SWITCHING USING PLURALITY OF MULTICASTS INTEROPERATING WITH PROGRAM RATING PREDICTION - Provided are a channel server, a channel prediction server, a terminal, and a method for a fast channel switching. The channel server may generate at least one delay multicast stream from an original multicast stream by applying a different delay value based on channel preference information, and may determine an optimal multicast stream from the at least one delay multicast stream, and transmit, to a terminal, response information associated with the optimal multicast stream in response to query information associated with the original multicast stream received from the terminal. | 05-05-2011 |
Byong-Kwon Moon, Gwangju KR
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20100218230 | SYSTEM AND METHOD FOR INTERACTIVE IPTV BROADCASTING SERVICE OF USER PARTICIPATION - There is provided a interactive IPTV broadcasting service system of user participation, the system including: a broadcast controller reserving time of IPTV broadcast channels to perform an IPTV broadcast according to the reserved time, notifying user participation to accept the user participation during the broadcasting service, and controlling so that video of the user making a request for participation in broadcasting is included in video of the broadcast in progress, and then broadcast, a plurality of clients each notifying the broadcast controller of the request of the corresponding user when the participation in broadcasting is requested according to a selection of the IPTV broadcasting user and generating video and audio traffic of the corresponding user, and a media server relaying the users' participation in broadcasting between the broadcast controller and the clients, and receiving and mixing video and audio traffic of a broadcaster and the video and audio traffic of each of the users making the requests for the participation in broadcasting. Accordingly, the broadcaster can synthesize videos of users into broadcast contents. | 08-26-2010 |
Byoung-Youp Moon, Gwangju KR
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20160131093 | AIR CLEANER STRUCTURE FOR BLOCKING INFLOWING OF DEBRIS AND OPERATION METHOD THEREOF - An air cleaner structure for blocking an inflow of debris to prevent the debris from inflowing into an engine intake passage of an air cleaner housing when replacing a filter includes a rotator fixing the filter and a filter cover to the air cleaner housing and generating a rotating force to open and close the engine intake passage. An engine intake passage door opens and closes the engine intake passage by the rotating force of the rotator. A connector has one end connected to the rotator and another end connected to the engine intake passage door to deliver the rotating force to the engine intake passage door. | 05-12-2016 |
Byung-Hak Moon, Gwangju KR
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20150252462 | NICKEL-BASED SUPER HEAT RESISTANT ALLOY AND METHOD OF MANUFACTURING THE SAME - The present invention relates to a nickel-based super heat resistant alloy and a method of manufacturing the same, and particularly, to a nickel-based super heat resistant alloy including 20 to 25 wt % of chromium (Cr), 10 to 15 wt % of molybdenum (Mo), 10 to 17 wt % of cobalt (Co), 0.01 to 0.15 wt % of carbon (C), 0.01 to 1 wt % of zirconium (Zr), 0.01 to 1 wt % of hafnium (Hf), 0.01 to 5 wt % of tantalum (Ta), 1 to 100 ppm of boron (B), 0.01 to 1 wt % of aluminum (Al), and a balance of nickel (Ni). | 09-10-2015 |
Byung Joon Moon, Gwangju KR
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20150364708 | PLASMONIC ORGANIC PHOTOVOLTAIC CELL USING INDUCED DIPOLE POLYMER-METAL NANOPARTICLE HYBRID AND FABRICATION PROCESS THEREOF - The present invention relates to a high-efficiency organic photovoltaic cell using surface plasmon effect of an induced dipole polymer-metal nanoparticle hybrid and a method for fabricating the same. More particularly, it relates to a high-efficiency organic photovoltaic cell whose photoelectric efficiency is maximized by depositing an induced dipole polymer-metal nanoparticle hybrid in or on a hole injection layer, thereby enhancing surface plasmonic properties, and a method for fabricating the same. | 12-17-2015 |
Byung Kwon Moon, Gwangju KR
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20130062535 | SURFACE-PROCESSING DEVICE FOR A DENTAL IMPLANT - A surface treatment device of dental implant according to an embodiment of the present invention includes: a body providing a treatment chamber to receive a surface processing object; a cover combined to the body to selectively open the treatment chamber; a light source irradiating UV light to a surface of the surface treatment object; and a reflective plate positioned at a bottom of the treatment chamber to reflect the UV light emitting from the light source toward the surface treatment object. | 03-14-2013 |
Chang Sun Moon, Gwangju KR
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20100174988 | SYSTEM AND METHOD FOR PROVIDING VIRTUAL INTERFACE - A system and a method of the present invention output a virtual interface screen to the display using independent video output channel which is not directly involved with the operating system. An embodiment for realizing the virtual interface uses an overlay function and the other uses a miniport function. In the case of using the overlay function, an overlay area in the video memory is used as the independent video output channel for displaying the virtual interface screen. In the case of using the miniport function, a part of commonly used general area in the video memory is used as the independent video output channel for displaying the virtual interface screen. The virtual interface of the present invention outputs a virtual interface screen independently of the operating system using an overlay function or a miniport function thereby providing the virtual interface screen to a display screen without assignment of screen resources from the operating system. | 07-08-2010 |
Hee Sung Moon, Gwangju KR
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20100156186 | PHOTOVOLTAIC AND FUEL CELL HYBRID GENERATION SYSTEM USING DUAL CONVERTERS AND SINGLE INVERTER AND METHOD OF CONTROLLING THE SAME - There is provided a photovoltaic and fuel cell hybrid generation system using dual converters and a single inverter and a method of controlling the same. A photovoltaic and fuel cell (PV-FC) hybrid generation system according to an aspect of the invention may include: a PV DC/DC converter unit converting a PV output voltage into a predetermined voltage; an FC DC/DC converter unit converting an FC output voltage into a predetermined voltage; a DC link unit commonly connecting an output terminal of the PV DC/DC converter unit and an output terminal of the FC DC/DC converter unit, and linking the converted PV output voltage from the PV DC/DC converter unit to the converted FC output voltage from the FC DC/DC converter unit to thereby generate a DC voltage; and a DC/AC inverter unit converting the DC voltage from the DC link unit into a predetermined AC voltage. | 06-24-2010 |
20110273130 | APPARATUS AND METHOD FOR CHARGING AND DISCHARGING PHOTOVOLTAIC PCS INTEGRATED BATTERY - There are provided an apparatus and method for charging and discharging a photovoltaic PCS integrated battery applied to a system that includes a first DC/DC converter | 11-10-2011 |
Hyung-Myung Moon, Gwangju KR
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20130223793 | TOTAL REFLECTION TYPE OPTICAL SWITCH USING POLYMER INSERTION TYPE SILICA OPTICAL WAVEGUIDE AND MANUFACTURING METHOD THEREOF - The present invention relates to a total reflection type optical switch using polymer insertion type silica optical waveguides and a manufacturing method thereof. The total reflection type optical switch forms a trench in an intersecting point of the silica optical waveguides having two optic routes, and inserts a polymer into the trench. A total reflection type optical switch has a heater which heats the polymer. The polymer is made of thermo-optic material, and totally reflects an optical signal as a refraction index falls when heated by the heater. In addition, when not heated by the heater, the polymer transilluminates the optical signal. When the polymer is made of electric-optic material, the total reflection type optical switch may have upper and lower electrodes for applying an electric field in the polymer instead of the heater. In this case, the total reflection type optical switch is capable of high speed switching, and is not limited to usages of an optical switch, and may be used as a variable optical attenuator by adjusting the voltage and current being applied. According to the present invention, it is possible to use the difference of the refraction indexes of the silica optical waveguides and the polymer due to temperature changes to transilluminate or totally reflect an optical signal according to changes of the refraction index of the polymer, thereby improving loss characteristics of the optical signal. | 08-29-2013 |
Hyun-Joon Moon, Gwangju KR
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20100145381 | MULTI-RINGED SEPARATOR FOR TUBULAR ORGANS - A multi-ringed tubular organ separator includes a first arm having a handle at a rear end and a second arm having a handle at a rear end and combined with the first arm for rotation about a pivot into an opened position and a closed position. The first arm and the second arm are provided at their front ends with main clamps cooperating to define a main clamping zone in which a tubular organ and surrounding tissues of a mammal can be enclosed. The first arm and the second arm are further provided with sub clamps formed adjacent to the main clamps and cooperating to define a sub clamping zone in which the tubular organ and the surrounding tissues can be enclosed in isolation from the main clamping zone, the main clamping zone remaining in communication with the sub clamping zone through a throat. | 06-10-2010 |
Ji Hong Moon, Gwangju KR
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20140314629 | HYBRID GASIFICATION SYSTEM - The present invention provides a hybrid gasification system which simultaneously has the advantages of an entrained-flow gasifier using pulverized fuel and a fluidized-bed gasifier utilized for gasifying fuel with relatively various properties. The present intention provides a hybrid gasification system employing a structure in which a second reaction chamber operated at a temperature of 700 to 900 is surrounded by a first reaction chamber operated at temperature, thereby obtaining an insulation effect, performing additional heat exchange, and minimizing a heat loss. Furthermore, the present invention provides a hybrid gasification system having a structure in which unreacted substances and tar within synthetic gas generated from a first reaction chamber reacts within a second reaction chamber, thereby increasing the entire gasification efficiency. | 10-23-2014 |
20140356256 | PYROLYSIS APPARATUS USING LIQUID METAL - The present invention relates to a pyrolysis device using a liquid metal including: a hollow reactor in which the liquid metal is received; a circulating pump connected to the reactor; a buffer tank disposed on an upper portion of the reactor and receiving the liquid metal from the circulating pump; a nozzle coupled with the buffer tank and jetting the liquid metal within the buffer tank into the reactor; and an air supply source supplying air to the liquid metal within the reactor, wherein char generated from fuel injected into the reactor is combusted by reacting with air introduced into a lower portion of the reactor through the air supply source, and liquid metal sprays jetted from the nozzle react with gases generated in the reactor to purify the gases. | 12-04-2014 |
20150151274 | APPARATUS FOR PYROLYSIS USING MOLTEN METAL - An embodiment of the present invention is directed to a pyrolysis device including a reactor in which an injected raw material and a melted liquid metal are present together, a circulating pump connected to the reactor, a buffer tank disposed on an upper portion of the reactor and receiving the liquid metal from the circulating pump, a nozzle coupled with the buffer tank and jetting the liquid metal within the buffer tank into the reactor, a separating apparatus separating pyrolyzed char and slag, and a combustion furnace connected to the reactor to combust the fuel supplied from the reactor and supply heat to the reactor, thereby reacting the liquid metal sprays jetted from the nozzle with gases generated in the reactor to purify the gases. | 06-04-2015 |
Ji Hyung Moon, Gwangju KR
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20110089452 | SEMICONDUCTOR LIGHT-EMITTING DEVICE AND METHOD FOR FABRICATING THE SAME - A semiconductor light-emitting device is provided. The semiconductor light-emitting device may include a light-emitting structure, an electrode, a reflective layer, a conductive support member, and a channel layer. The light-emitting structure may include a plurality of compound semiconductor layers. The electrode may be disposed on the compound semiconductor layer. The reflective layer may be disposed under the compound semiconductor layer. The conductive support member may be disposed under the reflective layer. The channel layer may be disposed along a bottom edge of the compound semiconductor layer. | 04-21-2011 |
Joo Sung Moon, Gwangju KR
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20100313912 | CLEANING APPARATUS AND DUST COLLECTING METHOD USING THE SAME - A cleaning apparatus and a dust collecting method using the same are provided. The cleaning apparatus includes a body, a brush unit rotatably provided at the body, a dust collecting unit to store contaminants, such as dust, swept by the brush unit, and a blowing unit to suction contaminants, such as dust, scattered by the brush unit and to move the suctioned contaminants to the dust collecting unit. | 12-16-2010 |
20120181099 | ROBOT CLEANER - A robot cleaner includes a main body, drive motors provided on the main body, each of the drive motors including a drive rotary shaft, drive wheels rotated by rotary force transmitted from the drive motors, gear units connecting the drive motors and the drive wheels, and wheel cover housings to support the drive wheels so that the drive wheels are pivotally rotated with respect to the main body, and pivot rotary shafts of the drive wheels and drive rotary shafts of the drive motors are coaxial with each other so as to achieve stable movement of the drive wheels. | 07-19-2012 |
20140067116 | SIDE BRUSH ASSEMBLY, ROBOT CLEANER AND CONTROL METHOD OF ROBOT CLEANER - A side brush assembly including a side arm capable of being exposed outside a main body and returning inside the main body and a side brush unit mounted to the side arm, a robot cleaner and a control method of the robot cleaner is provided. The robot cleaner includes a main body and at least one side brush assembly to increase a dust-removing area. The side brush assembly includes a side brush body, a side arm mounted to a bottom surface of the side brush body and configured to be exposed outside the main body, a side brush unit rotatably mounted to the side arm, a lever configured to rotate together with the side arm, a cam configured to rotate by receiving driving force from a driving motor, and an elastic member connecting the lever and the cam to rotate the lever by elastic force thereof. | 03-06-2014 |
20140283326 | ROBOT CLEANER AND CONTROL METHOD THEREOF - A robot cleaner includes a main body traveling along a floor surface and removing foreign substances in a cleaning travel mode, a sensor unit sensing obstacles around the main body, brush units sweeping foreign substances on a floor surface through rotation, and a controller reducing the traveling velocity of the main body and causing the main body to approach a front obstacle, if an area where a plurality of obstacles contacts each other is sensed by the sensor unit. | 09-25-2014 |
Sangmi Moon, Gwangju KR
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20140297806 | MACHINE TO MACHINE SYSTEM, METHOD AND SERVER USING SOCIAL NETWORK SERVICE - The present disclosure relates to a machine to machine (M2M) system, method and server using a Social Network Service (SNS). The M2M communication server receives control information of a first M2M apparatus from a second M2M apparatus that receives the control information through an SNS interface, converts the control information into a command that is recognizable by the first M2M apparatus, and transmits the command to the first M2M apparatus such that the second M2M apparatus receives information corresponding to the command. Accordingly, a human, as a user, communicates with an M2M apparatus, easily controls the M2M apparatus, and acquires information by use of a Social Network Service (SNS) interface that is familiar to the human. | 10-02-2014 |
Seunghwan Moon, Gwangju KR
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20160131893 | MEMS SCANNER - The present invention relates to a micro electro mechanical systems (MEMS) scanner, and more particularly, to an MEMS scanner for implementing stable driving while increasing a driving angle between a fixed electrode and a driving electrode using an MEMS process. The MEMs scanner comprises a lower frame, a pair of upper frames, a pair of levers, a pair of fixed electrode portions, and a driving electrode portion. | 05-12-2016 |
Seung-Hyeon Moon, Gwangju KR
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20090250343 | Tyrosinase enzyme electrode and production method thereof - Disclosed are a tyrosinase enzyme electrode containing metal nanoparticles and its producing method. Metal nanoparticles are applied to a surface of a support with high chemical stability. Also, a buffer layer consisting of a self-assembled monolayer is formed on the metal nanoparticles. Such self-assembled monolayer is used to immobilize tyrosinase enzyme which was subsequently prepared. In other words, the self-assembled monolayer is arranged between the metal nanoparticles and the tyrosinase enzyme so as to immobilize the tyrosinase enzyme on the support. Introduction of the metal nanoparticles into the electrode contributes to improvement in detection limits of the tyrosinase enzyme electrode. In addition, the introduction of substrate induces the activation of enzyme. | 10-08-2009 |
20150228950 | ORGANIC-INORGANIC COMPOSITE ANION EXCHANGE MEMBRANE CONTAINING POLYVINYLIDENE FLUORIDE POLYMER FOR NON-AQUEOUS REDOX FLOW BATTERY AND METHOD FOR PREPARING THE SAME - An organic-inorganic composite anion exchange membrane for non-aqueous redox flow batteries, which contains a polyvinylidene fluoride polymer, and a method for preparing the same are disclosed. | 08-13-2015 |
Sucbei Moon, Gwangju KR
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20090095911 | APPARATUS FOR MEASURING FLUORESCENCE LIFETIME - Disclosed is an apparatus for measuring a fluorescence lifetime. The apparatus for measuring the fluorescence lifetime comprises an excitation light generator that generates excitation light to be irradiated on a sample including fluorescence molecules; a fluorescence photon collecting unit that collects a plurality of fluorescence photons generated by irradiating the excitation light on the sample; a light sensor that converts the collected fluorescence photons into a fluorescence electrical signal; and a fluorescence lifetime signal processor that determines the fluorescence lifetime by calculating the average time of the fluorescence electrical signal with respect to a predetermined apparatus delay time. According to the above configuration, the present invention can accurately and precisely measure a fluorescence lifetime in a short measurement time by easy calculation. | 04-16-2009 |
Su-Young Moon, Gwangju KR
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20120095123 | POROUS POLYUREA MATERIAL AND METHODS FOR PREPARING THE SAME - The present invention relates to a porous polyurea material and a method for preparing the same. The porous polyurea material may be prepared by polymerization and crosslinking of tetra(4-aminophenyl)methane with a monomer two to four isocyanate (—NCO) groups. The method includes: mixing an organic solution of tetra(4-aminophenyl)methane with an organic solution of a monomer having two to four isocyanate groups; reacting the mixed solution under a nitrogen atmosphere; and drying a semi-solid or solid material formed by gelation of the reaction solution, or adding the reaction solution to a non-solvent before gelation of the reaction solution to form a precipitate, followed by drying, or applying the reaction solution to a substrate before gelation of the reaction solution, followed by drying. According to the present invention, the introduction of the monomer having a tetrahedral structure can impart good chemical resistance, heat resistance and durability to the porous polyurea material. | 04-19-2012 |
20140312278 | 3D COVALENT MOLECULAR NETWORK NANOCAPSULE AND PREPARING METHOD THEREOF - Disclosed herein are a polymer nanocapsule and a preparing method thereof, and more particularly, a 3D covalent molecular network nanocapsule, and a preparing method thereof. According to the present invention, a nanocapsule having thermal stability and solvent resistance due to a 3D covalent molecular network structure may be easily prepared without performing an additional post-processing process such as addition of a cross-linking agent or catalyst or removal of a template or core. Since the nanocapsule formed as described above may support an organic dye, metal particles, and the like, it is expected that the nanocapsule will be variously applied to material storage and transport, drug delivery, and the like. | 10-23-2014 |
20150059579 | GAS SEPARATION MEMBRANE FOR CARBON DIOXIDE AND PREPARATION METHOD THEREOF - The present disclosure relates to a gas separation membrane for filtration of carbon dioxide and a preparation method thereof. The gas separation membrane for filtration of carbon dioxide according to the present disclosure exhibits superior performance in rejecting carbon dioxide selectively from mixture gas. It is a separation membrane system leaving carbon dioxide and passing nitrogen, unlike the conventional systems which leave nitrogen and pass carbon dioxide. In addition, since compressed, highly-concentrated carbon dioxide can be obtained, the consumption of energy required for carbon dioxide storage following separation can be reduced. Furthermore, the separation membrane of the present disclosure, which is environment-friendly and consumes less energy, allows highly efficient separation and is easily applicable to the separation of carbon dioxide not only from the mixture of carbon dioxide with nitrogen but also from other mixtures of carbon dioxide with, for example, CO | 03-05-2015 |
Won Jin Moon, Gwangju KR
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20090065708 | MOON GRID FOR TRANSMISSION ELECTRON MICROSCOPY TOMOGRAPHY AND METHOD OF FABRICATING THE SAME - Disclosed is a moon grid for transmission electron microscopy tomography, including a mesh sheet for protecting an upper objects and a support film formed on the mesh sheet and having nanoparticles dispersed throughout, in which the nanoparticles dispersed throughout the support film are used as reference points in the reconstruction of two-dimensional transmission electron microscopy images into a three-dimensional image, thus omitting a process of attaching markers in the course of preparation of a sample and easily forming reference points even on a sample to which it is impossible to attach markers. A method of fabricating such a moon grid is also provided. | 03-12-2009 |
Young-Jin Moon, Gwangju KR
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20120086515 | RELAXATION OSCILLATOR - There is provided relaxation oscillator. The relaxation oscillator includes: a ramp wave generator generating ramp waves by a complementary operation between a first capacitor module charged and discharged according to a first switching signal and a second capacitor module charged and discharged according to a second switching signal; a negative feedback circuit unit generating a compensation voltage for compensating errors with reference voltage by being fedback with the ramp waves; and a switching signal generator generating the first switching signal controlling the charging and discharging of the first capacitor module and the second switching signal controlling the charging and discharging of the second capacitor module from the compensation voltage and the ramp waves. As a result, the present invention can generate ramp waves having a stable frequency while preventing a frequency from being changed due to a delay or an offset of the comparator. | 04-12-2012 |
20120155133 | DIRECT CURRENT/ DIRECT CURRENT CONVERTER FOR REDUCING SWITCHING LOSS, WIRELESS POWER RECEIVER INCLUDING DIRECT CURRENT/ DIRECT CURRENT CONVERTER - Provided are a direct current/direct current (DC/DC) converter and a wireless power receiver including the DC/DC converter. In one embodiment, a direct current-direct current (DC/DC) converter for use in a wireless power receiver, the DC/DC converter may include: a voltage converting unit configured to convert, DC voltage, to a predetermined DC voltage; a turn-on switch configured to control current flow of the DC voltage through the voltage converting unit; and a switching controller configured to: detect an amount of current of the voltage converting unit based on a first turn-on period of the turn-on switch, set a second turn-on period of the turn-on switch based on the detected amount of current, and control the turn-on switch based on the second turn-on period. | 06-21-2012 |
20130127525 | IC CIRCUIT - The present invention relates to an IC circuit. In an embodiment, an IC circuit includes: an RT terminal connected to an external; a current mirroring unit conducting a channel current between internal voltage power and the RT terminal and generating an internal reference current mirrored with the channel current; a negative feedback unit receiving the internal reference current, equalizing voltages of an RT terminal connection terminal and an internal reference current output terminal of the current mirroring unit to make the internal reference current constant, and providing the internal reference current inside the IC circuit; and an IC state indicating unit having a transistor, which operates complementarily with the current mirroring unit, connected between the RT terminal and a ground and providing the state of an IC or a system to the RT terminal by being linked with the complementary operation of the current mirroring unit. | 05-23-2013 |
20140015331 | APPARATUS AND METHOD FOR WIRELESS POWER RECEPTION - An apparatus and a method for wireless power reception are provided. A wireless power receiver includes a receiving unit configured to wirelessly receive a power. The wireless power receiver further includes a power consuming unit configured to consume the power, until a voltage applied to a load reaches a predetermined value, so that an amount of a power transferred from the receiving unit to the load is less than or equal to an initial accommodation power amount of the load. | 01-16-2014 |
20140152251 | APPARATUS AND METHOD FOR CHARGE CONTROL IN WIRELESS CHARGING SYSTEM - An apparatus and a method for charge control are provided. The apparatus for charge control may include an integrated direct current-to-direct current (DC/DC) converter configured to step up an output voltage level of a load to be greater than or equal to a supply voltage level set in a power amplifier, and the power amplifier configured to convert a direct current (DC) voltage stepped up by the integrated DC/DC converter into an alternating current (AC) voltage based on a resonant frequency, and to amplify the converted AC voltage. The apparatus for charge control may include a rectification unit configured to convert an AC power received wirelessly into a DC power; and a DC/DC converter configured to step down a voltage level of the DC power to a voltage level required by a load in the receiving mode. | 06-05-2014 |
20140176089 | PHASE SHIFT CIRCUIT AND POWER FACTOR CORRECTION CIRCUIT INCLUDING THE SAME - There are provided a phase shift circuit and a power factor correction circuit including the same. The phase shift circuit includes a ramp generation unit charging or discharging a capacitor connected to a switch device to generate a ramp signal, a reference signal generation unit generating a predetermined reference signal from the ramp signal, and a comparison unit comparing the ramp signal with the reference signal to generate a clock signal, wherein at least one of the reference signal generation unit and the comparison unit changes a negative or positive value of offset components included in the reference signal or the ramp signal within every operating period of the switch device. | 06-26-2014 |
20140177295 | PHASE SHIFT CIRCUIT AND POWER FACTOR CORRECTION CIRCUIT INCLUDING THE SAME - There are provided a phase shift circuit and a power factor correction circuit including the same. The phase shift circuit includes a switching circuit unit charging power in or discharging power from a capacitor through a plurality of switching devices and comparing a voltage of the capacitor with a predetermined reference voltage, and a clock generating unit generating a reference clock signal based on an output of the switching circuit unit, wherein the switching circuit unit turns the plurality of switching devices on or off, based on currents from inductors respectively included in a main circuit and a sub-circuit of a power factor correction circuit to determine a polarity of the voltage of the capacitor. | 06-26-2014 |
20140185339 | POWER FACTOR CORRECTION CIRCUIT - There is provided a power factor correction circuit including: a power conversion circuit unit controlling an inductor current according to a switching signal applied to a main switch to convert an external input voltage into an output voltage having a predetermined range; an imbalance detection circuit outputting an imbalance state signal when the external input voltage is in an unbalanced state by using the inductor current; and a soft start circuit unit performing soft starting by adjusting the switching signal when the imbalance state signal is output by the imbalance detection circuit unit. | 07-03-2014 |
20150102786 | PFC CONTROL CIRCUIT, ACTIVE PFC CIRCUIT AND PFC CONTROL METHOD - The present invention relates to a PFC control circuit, an active PFC circuit, and a PFC control method. According to an embodiment of the present invention, a PFC control circuit including: an inductor current sensing unit for sensing an inductor current of a PFC circuit; an output voltage feedback unit for outputting a feedback output signal; a sensing and feedback signal application unit for outputting a sensing voltage signal during switching duty on of the PFC circuit and adding the feedback output signal to the sensing voltage signal to output the added signal during switching duty off of the PFC circuit; and a PFC control unit for generating a comparison signal and generating a duty control signal from the comparison signal and a first reference signal to make variations due to an internal offset be removed or reduced is provided. | 04-16-2015 |
20150146466 | ACTIVE RECTIFIER AND CIRCUIT FOR COMPENSATING FOR REVERSE CURRENT LEAKAGE USING TIME DELAY SCHEME FOR ZERO REVERSE LEAKAGE CURRENT - A method of compensating for reverse current leakage in an active rectifier may include advancing an output of a comparator by a predetermined period of time by applying a predetermined offset voltage to a reference voltage input to the comparator, and activating a switch based on the output of the comparator. The method may also include deactivating the switch when a predetermined time delay elapses from a point in time at which the switch was activated. | 05-28-2015 |
Young Kyu Moon, Gwangju KR
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20130313958 | REFRIGERATOR - A structure for packaging an interior part such as a shelf and a door guard to prevent the interior part from being damaged due to impact and friction during transportation of a refrigerator is provided. Each of the shelf and the door guard may be accommodated in a shock-absorbing member in a state of being separated from each mounting portion to be fixed within a storage chamber. The shock-absorbing member coupled with the shelf or the door guard may be packaged by a package member and be fixed to a shelf mounting portion of an inner case. | 11-28-2013 |
20150137674 | REFRIGERATOR - A refrigerator may prevent an internal door from being opened together by an inertial force when an external door is opened, and may also prevent the external door from being opened together by an inertial force when the internal door is opened. The refrigerator includes a main body, a storage chamber provided in the main body so that a front surface thereof is opened, an internal door rotatably provided at a front surface of the main body so as to open and close the storage chamber and having an opening part in which a plurality of door guards are provided, an external door rotatably provided at a front surface of the internal door so as to open and close the opening part, and an internal door opening prevention device allowing or preventing opening of the internal door according to whether the external door is opened or closed. | 05-21-2015 |
Young-Sook Moon, Gwangju KR
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20150182571 | COMPOSITION COMPRISING DENDROPANAX MORBIFERAEXTRACT OR COMPOUND DERIVED THEREFROM AS ACTIVE INGREDIENT FOR PREVENTING AND TREATING BENIGN PROSTATIC HYPERPLASIA - Provided is a use of | 07-02-2015 |
20150202241 | USE FOR DENDROPANAX MORBIFERA EXTRACT FOR ADJUSTING 15- HYDROXYPROSTAGLANDIN DEHYDROGENASE AND PGE 2 ACTIVITY - Provided is a 15-PGDH activity adjusting function of a | 07-23-2015 |
Yung Jin Moon, Gwangju KR
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20120087160 | POWER FACTOR CORRECTION CIRCUIT - There is provided a power factor correction circuit capable of correcting a power factor of a power converting module through increasing an input current by switching a main switching element of a power converting module on the basis of a first reference wave having a slope based on a first signal and an error voltage, in particular, by limiting a switching frequency on the basis of a first reference wave having a slope based on a second signal lower than a first signal and an error voltage when the switching frequency of the main switching element increases because an input voltage of the power converting module is low. | 04-12-2012 |