Hangseok
Hangseok Choi, South Portland, ME US
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20140043865 | SYNCHRONOUS RECTIFIER CONTROL TECHNIQUES FOR A RESONANT CONVERTER - A resonant converter system includes a first stage having inverter circuitry and resonant tank circuitry configured to generate an AC signal from a DC input signal, a transformer configured to transform the AC signal, and a second stage. The second stage features synchronous rectifier (SR) circuitry including a plurality of SR switches each having a body diode and SR control circuitry. SR control circuitry is configured to generate gate control signals to control the conduction state of the SR switches so that the body diode conduction time is minimized and a negative current across the SR switches is reduced or eliminated. The method includes controlling the conduction state of SR switches to conduct as the body diode associated with the switch begins to conduct and controlling the SR switch to turn off as the current through the switch approaches a zero crossing. | 02-13-2014 |
Hangseok Choi, Seoul KR
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20150295622 | WIRELESS COMMUNICATION DEVICE AND METHOD OF OPERATING THE SAME - A calibrator to process an output signal of an analog digital converter in a wireless communication device, the calibrator comprising a level filter to remove noise from the output signal of the analog digital converter using mask information regulating a signal level; a timing filter to remove pulses from the level-filtered signal that are beyond a reference duty ratio by using timing information; a pattern filter to remove pulses from the timing-filtered signal that are judged to not comprise a reference number of consecutive pulses by using pattern information; and a duty correction circuit to correct a duty of the pattern-filtered signal to improve performance of the wireless communication device by separately performing a filtering operation on noise and a damping component included in a normal signal. | 10-15-2015 |
Hangseok Kim, Seoul KR
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20150201511 | STAND MODULE AND MOBILE TERMINAL INCLUDING THE STAND MODULE - Provided is a stand module including: a rod formed in a body of a mobile terminal so as to extend from the body of the mobile terminal, and supporting the body of the mobile terminal when the rod extends from the body of the mobile terminal; and a rotation control unit that controls rotation of the rod after the rod extends from the body of the mobile terminal, wherein the rod includes: a first rod formed in the body of the mobile terminal, the first rod having one end combined with the rotation control unit; a second rod exposed to the outside of the body of the mobile terminal when extending from the mobile terminal; and a hinge portion that connects the first rod and the second rod with each other, and that serves as an axis about which the second rod rotates with respect to the first rod. | 07-16-2015 |
Hangseok Oh, Seoul KR
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20130227152 | METHOD FOR SEARCHING FOR DEVICE AND COMMUNICATION DEVICE USING SAME - Provided are a device discovery method and a communication device thereof. The method includes: transmitting a probe request frame; receiving a probe response frame including session information on a client connected to a group owner (GO), from the GO among source and sink devices belonging to the display group; and determining whether to associate with the display group by using the session information in the probe response frame. | 08-29-2013 |
20150195794 | METHOD AND APPARATUS FOR IDENTIFYING CHANNEL INFORMATION IN A WIRELESS NETWORK - A method for transmitting and receiving, by a station, channel information in a wireless LAN system, the method comprising: | 07-09-2015 |
Hangseok Oh, Seocho-Gu KR
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20140003361 | METHOD AND APPARATUS FOR IDENTIFYING CHANNEL INFORMATION IN A WIRELESS NETWORK | 01-02-2014 |
Hangseok Oh, Gyeonggi-Do KR
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20150249946 | NETWORK CONNECTION METHOD AND DEVICE SUPPORTING SAME - A network connection method and a device supporting the same are provided. A network connection method by which a first wireless communication device supporting a first network system and a second network system connects to a second wireless communication device may include: transmitting, to the second wireless communication device supporting the first networking system, a handover request message for requesting for information in order to connect to the second networking system by using an out of band channel of the first networking system; receiving, from the second wireless communication device, provisioning information on an authorization for forming a group in the second networking system in response to the handover request message; and transmitting and receiving additional information for connecting the second networking system to the second wireless communication device according to information included in a handover select message. | 09-03-2015 |