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Hwang, Daejeon-Si
Cheol-Gyu Hwang, Daejeon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20090207077 | SWITCHED BEAM-FORMING APPARATUS AND METHOD USING MULTI-BEAM COMBINING SCHEME - Provided is a switched beam-forming apparatus which includes a beam-forming unit forming a plurality of beams using an array antenna, a beam selection adjusting unit measuring Quality of Service (QoS) values of each of a plurality of signals received through the plurality of beams, a beam selecting unit selecting at least two beams with high QoS from among the plurality of beams according to the results of the QoS measuring, and a beam combining unit combining the at least two beams selected by the beam selecting unit. | 08-20-2009 |
| 20090212885 | RESONATOR AND BANDPASS FILTER HAVING OVERLAY ELECTROMAGNETIC BANDGAP (EBG) STRUCTURE, AND METHOD OF MANUFACTURING THE RESONATOR - Provided is an Electromagnetic Bandgap (EBG) structure, particularly, a resonator and a bandpass filter having an overlay EBG structure, and a method of manufacturing the resonator. The resonator is manufactured by forming a transmission line and ground plates on a substrate, arranging a plurality of reflector units at regular intervals along the longitudinal direction of the transmission line, and removing at least one reflector among the plurality of reflectors, thus forming a common resonating mode. Therefore, since reflector units constructing capacitance components are separated from a substrate, it is possible to prevent electromagnetic waves from leaking out of the substrate and ensure a high Q characteristic in a high frequency environment due to a resonating unit formed between the reflector units. | 08-27-2009 |
| 20100244997 | WAVEGUIDE OF MULTI-LAYER METAL STRUCTURE AND MANUFACTURING METHOD THEREOF - A waveguide of a multi-layer metal structure and a manufacturing method thereof are provided, the method including applying a plurality of metal layers on a substrate and a plurality of insulating layers respectively between the respective metal layers. Accordingly, it is possible to minimize conductive loss by dispersing current uniformly through wide regions between a signal line and ground lines. | 09-30-2010 |
Chi-Ho Hwang, Daejeon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20100084556 | OPTICAL-INFRARED COMPOSITE SENSOR AND METHOD OF FABRICATING THE SAME - Provided are an optical-infrared composite sensor and a method of fabricating the same. The optical-infrared composite sensor can sense both optical and infrared radiation. The optical-infrared composite sensor includes an infrared sensor formed on a substrate, a silicon cap enveloping the infrared sensor to vacuum-package the infrared sensor, and an optical sensor formed at one side of the silicon cap. | 04-08-2010 |
| 20100085453 | APPARATUS FOR OPTICALLY COMBINING VISIBLE IMAGES WITH FAR-INFRARED IMAGES - An image sensing apparatus, particularly, an apparatus for optically combining visible images with far-infrared images is provided in which performing a separate signal processing may not be needed. The image combining apparatus emits light that is sensed by an image sensor, and reflects the light toward the image sensor in response to far-infrared rays being sensed from an object, thereby converting far-infrared information into information that can be sensed by the image sensor. | 04-08-2010 |
Dongwoo Hwang, Daejeon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20100237615 | Pipe connection joint - The present invention relates to a pipe connection joint that includes a linear slant portion formed on a pipe joining hole of a flange and a pipe-expanded portion expandably formed on a pipe, which is joined to the pipe joining hole, along the linear slant portion, whereby it provides a sufficient joining strength due to an increase of a contact area between the flange and the pipe, secures a firm fixation, prevents rotation of the pipe and guarantees communalization. In addition, the pipe connection joint is provided with an inwardly-curved surface portion of the pipe bent by micro R bending technology to minimize a bending distance, whereby it allows an easy product design in a restricted space. The pipe connection joint is further provided with a sealing member seating portion formed by the pipe-expanded portion of the pipe without needing additional process for seating of a sealing member to thereby minimize machining and reduce manufacturing expenses. | 09-23-2010 |
Gang Uk Hwang, Daejeon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20120144487 | ROUTING APPARATUS AND METHOD FOR DETECTING SERVER ATTACK AND NETWORK USING THE SAME - Routing apparatus and method for detecting a server attack are disclosed. The routing apparatus includes: a reception unit configured to receive a packet transmitted in a network; a transmission unit configured to transmit the packet along a transmission path; a memory unit configured to store data and/or information required for an operation; and a controller configured to set the transmission path of the packet in the network and perform packet switching along the set transmission path, wherein the reception unit receives server state information from servers at every certain time, the memory unit stores the received server state information, and the controller calculates a change in the state of the servers based on the received server state information, and determines that a server is attacked when a change in the state of the server is greater than a certain threshold value. | 06-07-2012 |
Hyun-Yong Hwang, Daejeon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20090040929 | Method and apparatus for dynamically managing hierarchical flows - Provided are a method and apparatus for dynamically managing hierarchical flows that more efficiently process packet traffic while maintaining compatibility with an existing packet data network in transferring both circuit traffic and packet traffic in a packet switched network. The method for dynamically managing hierarchical flows includes: receiving data packets, classifying the data packets according to attributes of the received data packets, and producing first flows; determining whether traffic of each of the first flows exceeds a predetermined bandwidth limit, and performing a packet drop process or producing second flows for first flows that exceed the bandwidth limit, according to a flow-specific policy; and performing second flow processing on the second flows according to a second flow policy. Only flows exceeding the bandwidth limit or causing congestion are hierarchically divided for management. This makes it possible to finely manage the flows without complex operations. | 02-12-2009 |
| 20090086764 | System and method for time synchronization on network - A system and method for time synchronization on a network is provided. According to the system and method for time synchronization, a slave clock device does not continuously receive a time synchronization message periodically transferred from a master clock device and thus does not correct its time upon all such occasions. Rather, the slave clock device requests time information from the master clock device only when the slave clock device needs to correct its time, and receives a time synchronization message transferred from the master clock device and compensates for its time deviation only while the slave clock device is activated, thereby reducing its power consumption and amount of computation. | 04-02-2009 |
In-Ki Hwang, Daejeon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20110145520 | AUDIO SIGNAL PROCESSING APPARATUS AND METHOD, AND COMMUNICATION TERMINAL APPARATUS - A signal processing technology achieved in a signal processing module, which is physically separate from a control module for controlling overall operations of a signal processing apparatus, is provided. Input of new data to a system memory is recognized. Upon the recognition of the input of the new data, the new data is read from the system memory. The new data read from the system memory is written to a local memory. Data sharing between software and hardware is effectively achieved in a system for performing a wideband codec processing using a dedicated hardware. | 06-16-2011 |
| 20120140939 | METHOD AND DEVICE FOR CANCELLING ACOUSTIC ECHO - An acoustic echo cancellation device for generating a pseudo echo signal by filtering an input remote speaker signal based on a plurality of adaptive filters and controlling the adaptive filters to filter the same based on a filter coefficient. The acoustic echo cancellation device generates an error signal by subtracting the pseudo echo signal from a nearby speaker signal, determines a convergence state of the filter coefficient based on the error signal, and sets at least one filter coefficient with a previously used value to stop the operation for calculating new values for the corresponding filter coefficients when the filter coefficient is determined to be converged. | 06-07-2012 |
| 20120140940 | METHOD AND DEVICE FOR CANCELLING ACOUSTIC ECHO - An acoustic control device for generating a pseudo echo signal by filtering an input remote speaker signal by using a plurality of adaptive filters and controlling the adaptive filters to perform filtering based on filter coefficients generates an error signal by subtracting a pseudo echo signal from an input nearby speaker signal, determines a convergence state of the filter coefficient based on the error signal, and controls the width of data input to the adaptive filter when the filter coefficient is determined to be converged | 06-07-2012 |
Jin-Taek Hwang, Daejeon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20080306231 | Novel perfluoroalkyl vinyl ether compound, process for preparing copolymer by using the compound, and optical plastic materials comprising copolymer prepared by the process - Disclosed herein are a novel perfluoroalkyl vinyl ether compound, a process for preparing a copolymer by using the perfluoroalkyl vinyl ether compound, and an optical plastic material comprising a copolymer prepared by the process. More specifically, the perfluoroalkyl vinyl ether has a particular molecular structure; the process is performed by copolymerizing the perfluoroalkyl vinyl ether compound with a common fluorinated olefin in the presence of a perfluorinated radical initiator; and, the optical plastic material comprises a copolymer prepared by the process and optionally a dopant. | 12-11-2008 |
| 20090262282 | BRIGHTNESS ENHANCEMENT FILM FOR LIQUID CRYSTAL DISPLAY AND MANUFACTURING METHOD THEREOF - A liquid crystal display having a brightness enhancement film and a method of manufacturing the brightness enhancement film, the method including providing a solution of high molecular weight resin on a high molecular weight film, uniformly distributing the solution of high molecular weight resin on the high molecular weight film, and drying the solution of high molecular weight resin to form a high molecular weight resin layer, wherein the high molecular weight resin layer has a hexagonal lattice structure. | 10-22-2009 |
Jung-Yeon Hwang, Daejeon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20130020393 | APPARATUS AND METHOD FOR DYNAMIC MULTIDIMENSIONAL CODES WITH TIME AND VISUAL RECOGNITION INFORMATION - A dynamic multi-dimensional code generation and recognition apparatus in which time information and visual recognition information are combined, and a method thereof are provided. According to the present invention, a dynamic multi-dimensional code or a time-variant code including visual recognition information which is associated with source information and changed over time is provided. Accordingly, users may easily ascertain existence of the multi-dimensional code and intended contents of the source information. | 01-24-2013 |
Sung Hyun Hwang, Daejeon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20120135689 | METHOD AND APPARATUS FOR DETECTING HETEROGENEOUS COMMUNICATION SYSTEM - A method and apparatus for detecting a heterogeneous communication system is provided. The apparatus include a radio frequency (RF) signal reception unit configured to receive a signal from a particular communication system, a silent duration evaluation unit configured to evaluate a silent duration between frames on the basis of the received signal, and a system type decision making unit configured to determine the type of the particular communication system on the basis of the evaluated silent duration. | 05-31-2012 |
Sung-Woo Hwang, Daejeon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20100204347 | ORGANIC AEROGEL, COMPOSITION FOR FORMING THE SAME, AND METHOD OF PREPARING THE SAME - Disclosed is an organic aerogel including a polymer obtained from reaction an aryl alcohol compound, an aldehyde compound, and a polyol compound, a composition for forming the same, and a method of preparing the same. | 08-12-2010 |
| 20110054052 | POLYURETHANE FOAM COMPOSITION AND POLYURETHANE FOAM PREPARED USING SAME - A polyurethane foam composition that includes polyol, isocyanate, a catalyst, a surfactant, a physical blowing agent, a chemical blowing agent, a nucleating agent and a silsesquioxane compound is provided. | 03-03-2011 |