Patents by Inventor Kyu-Sung Han
Kyu-Sung Han has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8987164Abstract: A semiconductor of which a substance such as a semiconductor photocatalyst is uniformly coated on the surface thereof with a graphitic carbon film and a method of fabricating the same are disclosed. According to the inventive method, a graphitic carbon film having a thickness of 1 nm or less is uniformly formed on the surface of the semiconductor by performing hydrothermal synthesis and pyrolysis on glucose, so as to keep the original structure crystallinity of the semiconductor photocatalyst to be a support of the carbon film.Type: GrantFiled: December 7, 2012Date of Patent: March 24, 2015Assignee: Korea Advanced Institute of Science and TechnologyInventors: Jeung-Ku Kang, Dong-Ki Lee, Kyu-Sung Han, Weon-Ho Shin, Jung-Woo Lee, Jung-Hoon Choi, Kyung-Min Choi, Yeob Lee
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Publication number: 20150063174Abstract: In a transmitter apparatus of a mobile device, a radio frequency unit has transmitting terminals for sending wireless signals of different frequency bands. Transmission filters are respectively connected to the transmitting terminals and perform a filtering process for the signal of each frequency band. A first switch has a single output terminal and input terminals respectively connected to the transmission filters, performing a switching operation to connect one of the input terminals and the output terminal in response to a control signal. A power amplifier amplifies the signal transmitted through the output terminal of the first switch. A second switch has a single input terminal connected to the power amplifier, and output terminals corresponding to the transmission filters. The second switch performs a switching operation to connect the input terminal and one of the output terminals in response to the control signal.Type: ApplicationFiled: October 14, 2014Publication date: March 5, 2015Inventor: Kyu Sung Han
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Patent number: 8861406Abstract: In a transmitter apparatus of a mobile device, a radio frequency unit has transmitting terminals for sending wireless signals of different frequency bands. Transmission filters are respectively connected to the transmitting terminals and perform a filtering process for the signal of each frequency band. A first switch has a single output terminal and input terminals respectively connected to the transmission filters, performing a switching operation to connect one of the input terminals and the output terminal in response to a control signal. A power amplifier amplifies the signal transmitted through the output terminal of the first switch. A second switch has a single input terminal connected to the power amplifier, and output terminals corresponding to the transmission filters. The second switch performs a switching operation to connect the input terminal and one of the output terminals in response to the control signal.Type: GrantFiled: April 22, 2011Date of Patent: October 14, 2014Assignee: Samsung Electronics Co., Ltd.Inventor: Kyu Sung Han
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Publication number: 20140021589Abstract: A semiconductor of which a substance such as a semiconductor photocatalyst is uniformly coated on the surface thereof with a graphitic carbon film and a method of fabricating the same are disclosed. According to the inventive method, a graphitic carbon film having a thickness of 1 nm or less is uniformly formed on the surface of the semiconductor by performing hydrothermal synthesis and pyrolysis on glucose, so as to keep the original structure crystallinity of the semiconductor photocatalyst to be a support of the carbon film.Type: ApplicationFiled: December 7, 2012Publication date: January 23, 2014Applicant: Korea Advanced Institute of Science and TechnologyInventors: Jeung-Ku KANG, Dong-Ki LEE, Kyu-Sung HAN, Weon-Ho SHIN, Jung-Woo LEE, Jung-Hoon CHOI, Kyung-Min CHOI, Yeob LEE
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Patent number: 8571129Abstract: A portable terminal and a method operate multiple input multiple output (MIMO) antennas. Received signal strength indications (RSSIs) of the MIMO antennas are measured through a wireless communication unit that transmits and receives a wireless signal using the MIMO antennas. A path between a MIMO antenna with a greatest RSSI and a broadcast receiving unit is connected during a broadcast mode.Type: GrantFiled: April 12, 2011Date of Patent: October 29, 2013Assignee: Samsung Electronics Co., Ltd.Inventor: Kyu Sung Han
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Patent number: 8489050Abstract: A method for tuning to a radio broadcast frequency in a portable terminal is disclosed. The method includes: determining whether a condition for requiring tuning information is satisfied; computing tuning information using received signal strength indication (RSSI) values of signals received by frequencies if a condition for requiring tuning information is satisfied; and tuning to a radio broadcast frequency corresponding to a radio broadcasting requested by a user, using the computed tuning information, and receiving radio broadcast signals. The tuning information includes: a threshold of RSSI serving as a reference value determine the presence of a radio broadcasting channel; and a Signal-to-Noise Ratio (SNR) value to minimize noise levels.Type: GrantFiled: December 2, 2009Date of Patent: July 16, 2013Assignee: Samsung Electronics Co., Ltd.Inventor: Kyu Sung Han
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Patent number: 8391813Abstract: A portable terminal includes an apparatus for controlling transmission power. The apparatus includes a storage unit that stores a first maximum transmission power corresponding to the maximum power that can be transmitted when intensity of reception signal is more than a predefined reference value and a second maximum transmission power corresponding to the maximum power that can be transmitted when intensity of the reception signal is less than the reference value. A controller can transmit a call connection request signal with the first maximum transmission power or with the second maximum transmission power depending on intensity of the reception signal when user tries a call connection. A power amplifier module (PAM) can amplify the call connection request signal according to the control of the controller.Type: GrantFiled: January 7, 2010Date of Patent: March 5, 2013Assignee: Samsung Electronics Co., Ltd.Inventor: Kyu Sung Han
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Publication number: 20120142524Abstract: Disclosed are a nanocrater catalyst in metal nanoparticles with a nanocrater form of hole structure in center of the catalyst which is useful for manufacturing nano-sized materials and/or articles with desired structure and characteristics, a preparation method thereof including a plasma etching and chemical etching process (“PTCE process”), and nano-sized materials and/or articles manufactured by using the nanocrater catalyst in metal nanoparticles.Type: ApplicationFiled: February 9, 2012Publication date: June 7, 2012Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jeung-Ku KANG, Augustine SAJI, Jung-Woo LEE, Weon-Ho SHIN, Kyu-Sung HAN, Jung-Hoon CHOI
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Patent number: 8158034Abstract: TiO2-xNx (0.01?x?0.2) nanotubes and a method for preparing the same are disclosed. More particularly, TiO2-xNx (0.01?x?0.2) nanotubes doped with nitrogen atoms by treating TiO2 nanotubes through nitrogen plasma to partially substitute oxygen portion of TiO2 nanotube with nitrogen, and a method for preparing the same are disclosed. The TiO2-xNx (0.01?x?0.2) nanotube of the present invention is prepared by doping nitrogen on a TiO2 nanotube to control an electronic structure and reduce a band gap of the TiO2 nanotube, so that the prepared TiO2-xNx (0.01?x?0.2) nanotube exhibits improved conductivity and extended light absorption range from a UV ray area up to a visible light area, thus having more enhanced applicable performance in optical and/or electrochemical aspects.Type: GrantFiled: June 19, 2009Date of Patent: April 17, 2012Assignee: Korea Advanced Institute of Science and TechnologyInventors: Jeung-Ku Kang, Kyu-Sung Han, Jung-Woo Lee, Yong-Mook Kang
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Patent number: 8137760Abstract: Disclosed are a nanocrater catalyst in metal nanoparticles with a nanocrater form of hole structure in center of the catalyst which is useful for manufacturing nano-sized materials and/or articles with desired structure and characteristics, a preparation method thereof including a plasma etching and chemical etching process (“PTCE process”), and nano-sized materials and/or articles manufactured by using the nanocrater catalyst in metal nanoparticles.Type: GrantFiled: December 12, 2007Date of Patent: March 20, 2012Assignee: Korea Advanced Institute of Science and TechnologyInventors: Jeung-Ku Kang, Augustine Saji, Jung-Woo Lee, Weon-Ho Shin, Kyu-Sung Han, Jung-Hoon Choi
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Patent number: 8112080Abstract: A method and system for providing a broadcast/multicast (BCAST) service, are provided. The method includes obtaining, by the terminal, at least one BCAST service from a visiting network when the terminal roams in the visiting network.Type: GrantFiled: August 4, 2005Date of Patent: February 7, 2012Assignee: LG Electronics Inc.Inventors: Kyu-Sung Han, Dong-Hee Shim, Min-Jung Shon
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Patent number: 8112081Abstract: A method of providing a broadcast/multicast (BCAST) service, the method including receiving, from a terminal, a request of access to a BCAST service, performing service authorization with a home network, delivering, to the terminal, a message including a rights object (RO) to access the BCAST service, if the terminal is authorized to receive the BCAST service as a result of the service authorization, and providing the BCAST service to the terminal that was authorized to receive the BCAST service.Type: GrantFiled: July 15, 2008Date of Patent: February 7, 2012Assignee: LG Electronics Inc.Inventors: Kyu-Sung Han, Dong-Hee Shim, Min-Jung Shon
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Patent number: 8077687Abstract: A method and device for providing a broadcast/multicast service are discussed. According to an embodiment, the invention provides a method comprising: receiving, by a client module, a service guide including contents information with respect to one or more contents from a broadcast/multicast server; transmitting, by the client module, a broadcast/multicast request message with respect to contents selected by a user of a specific terminal among the contents information included in the received service guide to the broadcast/multicast server; transmitting, by the client module, a location tracking request message with respect to the specific terminal to a network entity; receiving a response message with respect to the location tracking request message, the response message including a location tracking result from the network entity; transmitting, by the client module, location information of the specific terminal to the broadcast/multicast server.Type: GrantFiled: February 5, 2009Date of Patent: December 13, 2011Assignee: LG Electronics Inc.Inventors: Dong-Hee Shim, Min-Jung Shon, Sung-Mu Son, Kyu-Sung Han
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Patent number: 8064420Abstract: A method and device for receiving a broadcast/multicast service as discussed. According to an embodiment, the invention provides a method of receiving a broadcast/multicast service by a terminal, the method comprising: receiving a service guide from a network including a broadcast/multicast server, the service guide being used by a user to select specific contents related to a broadcast/multicast service; transmitting information on the contents selected by the user, to the network; transmitting a content request to the network; and receiving contents from the network in response to the content request, wherein the received contents were further selected, among the contents selected by the user, by the broadcast/multicast server that performed an exact location tracking of the terminal to enable location based filtering of services corresponding to the contents selected by the user.Type: GrantFiled: February 5, 2009Date of Patent: November 22, 2011Assignee: LG Electronics Inc.Inventors: Dong-Hee Shim, Min-Jung Shon, Sung-Mu Son, Kyu-Sung Han
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Publication number: 20110261727Abstract: In a transmitter apparatus of a mobile device, a radio frequency unit has transmitting terminals for sending wireless signals of different frequency bands. Transmission filters are respectively connected to the transmitting terminals and perform a filtering process for the signal of each frequency band. A first switch has a single output terminal and input terminals respectively connected to the transmission filters, performing a switching operation to connect one of the input terminals and the output terminal in response to a control signal. A power amplifier amplifies the signal transmitted through the output terminal of the first switch. A second switch has a single input terminal connected to the power amplifier, and output terminals corresponding to the transmission filters. The second switch performs a switching operation to connect the input terminal and one of the output terminals in response to the control signal.Type: ApplicationFiled: April 22, 2011Publication date: October 27, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Kyu Sung Han
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Publication number: 20110249765Abstract: A portable terminal and a method operate multiple input multiple output (MIMO) antennas. Received signal strength indications (RSSIs) of the MIMO antennas are measured through a wireless communication unit that transmits and receives a wireless signal using the MIMO antennas. A path between a MIMO antenna with a greatest RSSI and a broadcast receiving unit is connected during a broadcast mode.Type: ApplicationFiled: April 12, 2011Publication date: October 13, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Kyu Sung Han
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Publication number: 20110110848Abstract: Disclosed is a titanate nanostructure, especially, represented by a chemical formula of AaBbTixOy wherein A and B are alkaline metals and 0?a?9, 0?b?9, 1?a+b?18, 1?x?10 and 2?y?20 with a, b, x and y each being an integer. A method for using the titanate nanostructure as a hydrogen storage medium is also provided.Type: ApplicationFiled: January 13, 2011Publication date: May 12, 2011Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jeung-Ku Kang, Jung-Woo Lee, Kyu-Sung Han, Yeob Lee, Dong-Ki Lee
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Patent number: 7897131Abstract: The present invention relates to a method for manufacturing a transition metal-carbon nanotube hybrid material using nitrogen as a medium. The present invention is characterized in that nitrogen-added carbon nanotube is grown in the presence of metal catalyst particles by reacting an hydrocarbon gas with a nitrogen gas by a chemical vapor deposition (CVD) and a transition metal-carbon nanotube hybrid material where a transition metal is uniformly attached to the entire carbon nanotube structure in which nitrogen with a great chemical reactivity is added as heterogeneous elements is chemically manufactured. Therefore, the present invention does not use an acid treatment required to attach transition-metal atoms to the carbon-nanotube, a surface treating process using a surfactant and the like and an inhibitor for preventing the coagulation of the transition metal so that a simplification of the process is obtained and the method is an environment-friendly method.Type: GrantFiled: July 20, 2007Date of Patent: March 1, 2011Assignee: Korea Advanced Institute of Science and TechnologyInventors: Jeung-Ku Kang, Seong-Ho Yang, Hyun-Seok Kim, Kyu-Sung Han, Se-Yun Kim, Jung-Woo Lee, Weon-Ho Shin, Jun-Hyeon Bae
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Publication number: 20110009258Abstract: Disclosed is a titanate nanostructure, especially, represented by a chemical formula of NaKTi3O7. A method for preparation of a titanate nanostructure is also provided. The method includes mixing titanium dioxide powder with an alkaline solution to prepare a titanium dioxide solution; and carrying out hydrothermal synthesis of the prepared titanium dioxide solution at a temperature of 120° C. to 180° C. for 12 to 72 hours.Type: ApplicationFiled: September 9, 2009Publication date: January 13, 2011Applicant: Korea Advanced Institute of Science and TechnologyInventors: Jeung-Ku Kang, Jung-Woo Lee, Kyu-Sung Han, Yeob Lee, Dong-Ki Lee
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Patent number: 7850940Abstract: The present application provides a C1-xNx nanotube with pores having nano-sized diameter ranging from 5 to 10 ?, where x ranges from 0.001 to 0.2, and a method for controlling the size and quantity of pores in said nanotube by reacting hydrocarbon gas, nitrogen gas, and oxygen gas or hydrogen gas together in the presence of metal catalyst and by controlling the concentration of nitrogen gas.Type: GrantFiled: June 1, 2009Date of Patent: December 14, 2010Assignee: Korea Advance Institute of Science and TechnologyInventors: Jeung-Ku Kang, Jai-Young Lee, Hyun-Seok Kim, Seong-Ho Yang, Kyu-Sung Han, Se-Yun Kim, Jung-Woo Lee, Weon-Ho Sin