Patents by Inventor Choon Lee

Choon Lee 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).

  • Patent number: 9805626
    Abstract: The present invention relates to a respiration mimic device, and includes a chamber having an interior space filled with fluid, a lung mimic, to be contracted or expanded, accommodated at the interior space in the chamber; a lung copying unit including a tumor mimic distributed in the lung mimic; a driving unit for copying motion patterns of the lung according to actual respiration and contracting or expanding the lung mimic; and an abdomen copying unit for elevating vertically according to contraction or expansion of the lung mimic and copying an abdomen.
    Type: Grant
    Filed: November 16, 2014
    Date of Patent: October 31, 2017
    Assignee: THE CATHOLIC UNIVERSITY OF KOREA INDUSTRY-ACADEMIC COOPERATION FOUNDATION
    Inventors: Young Nam Kang, Hong Seok Jang, Ja Choon Koo, Ji Na Kim, Hun Joo Shin, Young Kyu Lee, Jae Choon Lee, Hyoung Wook Park, Hyuk Jin Lee, Hae Jin Lee
  • Publication number: 20170311083
    Abstract: A MEMS microphone includes a substrate having a cavity, a back plate disposed over the substrate, a diaphragm being disposed between the substrate and the back plate and being spaced apart from the substrate and the back plate and at least one anti-buckling portion provided between the substrate and the diaphragm. The diaphragm covers the cavity and the diaphragm senses an acoustic pressure to create a displacement. The anti-buckling portion is configured to temporarily support the diaphragm in case of a warpage of the diaphragm to prevent a buckling of the diaphragm. Thus, the MEMS microphone can prevent the diaphragm from generating a warpage by more than a predetermined degree, so that the diaphragm can have a tensile stress and the buckling phenomenon of the diaphragm can be prevented.
    Type: Application
    Filed: April 26, 2017
    Publication date: October 26, 2017
    Inventors: Jong Won SUN, Joo Hyeon LEE, Han Choon LEE
  • Publication number: 20170311088
    Abstract: A MEMS microphone includes a substrate having a cavity, a back plate disposed over the substrate and having a plurality of acoustic holes, a diaphragm disposed between the substrate and the back plate, and an anchor extending from a circumference of the diaphragm to be connected with an end portion of the diaphragm. The diaphragm is spaced apart from the substrate and the back plate to covers the cavity, and the diaphragm senses an acoustic pressure to generate a displacement. The anchor extends from a circumference of the diaphragm to be connected with an end portion of the diaphragm, and is connected with the substrate to support the diaphragm. Thus, the MEMS microphone can prevent a portion of an insulation layer located around the anchor from remaining and can prevent a buckling phenomenon of the diaphragm from occurring.
    Type: Application
    Filed: April 26, 2017
    Publication date: October 26, 2017
    Inventors: Jong Won SUN, Han Choon LEE
  • Publication number: 20170311089
    Abstract: A MEMS microphone includes a substrate having a cavity, a back plate disposed over the substrate and having a plurality of acoustic holes, a diaphragm disposed over the substrate to cover the cavity, the diaphragm being disposed under the back plate to be spaced apart from the back plate, including venting holes communicating with the cavity, and sensing an acoustic pressure to create a displacement, a first insulation layer interposed between the substrate and the diaphragm to support the diaphragm, and the first insulation layer including an opening formed at a position corresponding to the cavity to expose the diaphragm, a second insulating layer formed over the substrate to cover an upper face of the back plate and an insulating interlayer formed between the first insulation layer and the second insulation layer, and the insulation interlayer being located outside the diaphragm and supporting the second insulation layer to make the back plate be spaced from the diaphragm.
    Type: Application
    Filed: April 26, 2017
    Publication date: October 26, 2017
    Inventors: Jong Won SUN, Han Choon LEE
  • Publication number: 20170234821
    Abstract: A semiconductor gas sensor includes a substrate having a cavity, a first insulation layer formed on the substrate, including an exposure hole formed at a position corresponding to the cavity and a peripheral portion of the cavity, a second insulation layer formed on the first insulation layer, covering the exposure hole, a heating electrode formed on the second insulation layer, being formed at a position corresponding to the cavity, a sensing electrode formed over the heating electrode, being electrically insulated from the heating electrode, a detection layer covering the sensing electrode, being capable of having a variable resistance when acting with a predetermined kind of gas, and a vent hole formed by penetrating the second insulation layer to communicate with the exposure hole, and the vent hole being capable of dissipating heat from the heating electrode in a upward direction with respect to the substrate.
    Type: Application
    Filed: January 24, 2017
    Publication date: August 17, 2017
    Inventors: Han Choon Lee, Ye Eun Na, Joo Hyeon Lee
  • Patent number: 9722523
    Abstract: The present invention relates to an inverter vector driving system and a method for estimating capacitance using the same. The present invention provides a method for estimating capacitance in an inverter vector driving system including a capacitor to which a rectified DC voltage of a three-phase power supply is charged, and a PWM inverter configured to transform the DC voltage into a three-phase AC voltage to be applied to a motor of an induction motor, including: operating the motor of the IM in a regeneration mode; generating a d-axis voltage command and a q-axis voltage command for the motor; adjusting a pulse of the PWM inverter by using the d-axis voltage command and the q-axis voltage command; and estimating capacitance of the capacitor by using a DC-link voltage and a DC-link current that are generated at the capacitor due to the inclusion of the AC component.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: August 1, 2017
    Assignee: RESEARCH COOPERATION FOUNDATION OF YEUNGNAM UNIVERSITY
    Inventors: Dong-Choon Lee, Thanh Hai Nguyen, Yoon-Cheul Jeung
  • Publication number: 20170212070
    Abstract: In embodiments, a semiconductor gas sensor includes a substrate having a cavity, a first insulation layer formed on the substrate, including an exposure hole formed at a position corresponding to the cavity and a peripheral portion of the cavity, a second insulation layer formed on the first insulation layer, covering the exposure hole, a heating electrode formed on the second insulation layer, being formed at a position corresponding to the cavity, a sensing electrode formed over the heating electrode, being electrically insulated from the heating electrode and a detection layer covering the sensing electrode, being capable of having a variable resistance when acting with a predetermined kind of gas.
    Type: Application
    Filed: January 24, 2017
    Publication date: July 27, 2017
    Inventors: Joo Hyeon Lee, Han Choon Lee
  • Patent number: 9692311
    Abstract: The present invention relates to a high-voltage direct current (HVDC) converter comprising: a 12-pulse diode rectifier having two three-phase bridge diode rectifiers connected in series to rectify, to 12 pulses, alternating current (AC) power inputted from a point of connection on the sea; and a voltage-source converter connected in series to a lower end of the 12-pulse diode rectifier, wherein the voltage-source converter controls a voltage of the AC power inputted from the point of connection on the sea and a DC link voltage of the voltage-source converter.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: June 27, 2017
    Assignee: KOREA ELECTRIC POWER CORPORATION
    Inventors: Chan Ki Kim, Jin Young Kim, Dong Choon Lee, Thanh Hai Nguyen
  • Patent number: 9685238
    Abstract: A clock signal generation device includes a variable voltage providing circuit, a fixed voltage providing circuit and a clock signal generating circuit. The variable voltage providing circuit provides a variable reference voltage based on a selection signal, a reference voltage and a temperature coefficient. The variable reference voltage is varied according to temperature. The fixed voltage providing circuit provides a fixed reference voltage that is determined according to the selection signal. The fixed reference voltage is a constant voltage. The clock signal generating circuit provides a clock signal based on the fixed reference voltage and the variable reference voltage. The performance of the clock signal generation device may be increased by providing the clock signal based on the variable reference voltage that is varied according to the temperature and based on the fixed reference voltage.
    Type: Grant
    Filed: April 19, 2016
    Date of Patent: June 20, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Venkataramana Gangasani, Sung-Whan Seo, Hi-Choon Lee, Vivek Venkata Kalluru
  • Patent number: 9679020
    Abstract: A method of ranking a plurality of regulated data sources and a plurality of non-regulated data sources for a data field is provided. The method evaluates consistency and assigns a ranking for a regulated data source based upon records having identical values and records having non-identical values for the data field in the regulated data source compared to other regulated data sources under analysis. The method further evaluates consistency and assigns a ranking for a non-regulated data source based upon records having identical values compared to other non-regulated data sources under analysis.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: June 13, 2017
    Assignee: American Express Travel Related Services Company, Inc.
    Inventors: Young Choon Lee, Oliver Winslow Selwyn
  • Patent number: 9597366
    Abstract: The present invention relates to the anticancer composition containing an effective amount of herbal extract, and more particularly to the anticancer composition containing an effective amount of extract of Salviae Miltiorrhizae Radix, Chrysanthemum indicum, Acanthopanax senticosus, Cinnamomum cassia Blume, Eucommia ulmoides Oliv., Glycyrrhiza uralensis Fisch, Pueraria thunbergiana Benth, Crataegus pinnatifida Bunge, Cassia tora, Carthamus tinctorius L., Paeonia lactiflora Pall, and Angelica gigas Nakai. The anticancer composition containing an effective amount of herbal extract has advantage of minimal or few side effects and cytotoxicity as compared to many existing anticancer drugs having cytotoxicity and side effects.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: March 21, 2017
    Assignee: DONG-A UNIVERSITY RESEARCH FOUNDATION FOR INDUSTRY-ACADEMY COOPERATION
    Inventors: Jai-Heon Lee, Kyoung-Sook Kim, Young-Choon Lee, Chang-Woo Cho, KyoungMee Kim, Young Soo Chung
  • Patent number: 9556362
    Abstract: Provided herein is a resin-metal complex and a manufacturing method thereof, the resin-metal complex being a synthetic resin comprising an olefin resin, filler, and coupling agent combined with a metallic material, the filler being at least one of an organic filler and inorganic filler, the inorganic filler being wood flour, wood pellet, wood fiber, or paper powder, and the inorganic filler being talc, calcium carbonate, wollastonite, or kaolinite.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: January 31, 2017
    Assignee: WAPS. CO. LTD
    Inventors: Jae Choon Lee, Sungmin Park, Sungshick Paik
  • Patent number: 9554018
    Abstract: An image forming apparatus includes an image obtaining unit configured to obtain an image of a document, a document supplying unit configured to supply a document to the image obtaining unit, an image forming unit configured to form the image on a printing medium, a storing unit configured to store supply status information of the document, and a controller configured to perform a preparation for an image forming operation in response to at least one of the document being supplied to one of the image obtaining unit and the document supplying unit and an option setting command of the image forming operation being input. The controller, in response to the option setting command being input after the preparation for the image forming operation is stopped, is configured to perform the preparation for the image forming operation again based on the supply status information of the document.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: January 24, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Ui Choon Lee
  • Publication number: 20170011806
    Abstract: A clock signal generation device includes a variable voltage providing circuit, a fixed voltage providing circuit and a clock signal generating circuit. The variable voltage providing circuit provides a variable reference voltage based on a selection signal, a reference voltage and a temperature coefficient. The variable reference voltage is varied according to temperature. The fixed voltage providing circuit provides a fixed reference voltage that is determined according to the selection signal. The fixed reference voltage is a constant voltage. The clock signal generating circuit provides a clock signal based on the fixed reference voltage and the variable reference voltage. The performance of the clock signal generation device may be increased by providing the clock signal based on the variable reference voltage that is varied according to the temperature and based on the fixed reference voltage.
    Type: Application
    Filed: April 19, 2016
    Publication date: January 12, 2017
    Inventors: VENKATARAMANA GANGASANI, SUNG-WHAN SEO, HI-CHOON LEE, VIVEK VENKATA KALLURU
  • Patent number: 9532035
    Abstract: An imaging system on an aerial vehicle, includes: a group of rotating camera including at least a first and a second rotating cameras on the aerial vehicle; and a control part which controls a first virtual rotation track of the first rotating camera and a second virtual rotation track of the second rotating camera and allows shots to be taken at multiple photograph-shooting points on the first virtual rotation track and the second virtual rotation track; wherein the control part controls a set of multiple photograph-shooting points on the first virtual rotation track and those on the second virtual rotation track to be substantially in a grid shape. Accordingly, a 3D image could be acquired by using the group of rotating cameras on the aerial vehicle during a relatively short endurance flight and more information on images created in such a method could be estimated.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: December 27, 2016
    Assignee: National Institute of Meteorological Research
    Inventors: Kyu Young Choi, Yong Hee Lee, Kwang Deuk Ahn, Hee Choon Lee
  • Publication number: 20160282392
    Abstract: The present invention relates to an inverter vector driving system and a method for estimating capacitance using the same. The present invention provides a method for estimating capacitance in an inverter vector driving system including a capacitor to which a rectified DC voltage of a three-phase power supply is charged, and a PWM inverter configured to transform the DC voltage into a three-phase AC voltage to be applied to a motor of an induction motor, including: operating the motor of the IM in a regeneration mode; generating a d-axis voltage command and a q-axis voltage command for the motor; adjusting a pulse of the PWM inverter by using the d-axis voltage command and the q-axis voltage command; and estimating capacitance of the capacitor by using a DC-link voltage and a DC-link current that are generated at the capacitor due to the inclusion of the AC component.
    Type: Application
    Filed: March 25, 2016
    Publication date: September 29, 2016
    Applicant: RESEARCH COOPERATION FOUNDATION OF YEUNGNAM UNIVERSITY
    Inventors: Dong-Choon LEE, Thanh Hai NGUYEN, Yoon-Cheul JEUNG
  • Publication number: 20160279253
    Abstract: Disclosed herein are an N-terminal modified PEG-TRAIL conjugates and methods of making and using thereof. The PEG-TAIL conjugates have bioactivity that is substantially similar to that of native TRAIL coupled with an extended in vivo half-life and enhanced stability. The disclosed PEG-TRAIL conjugates exhibit significantly reduced hepatotoxicity when compared to that of non-PEGylated trimeric TRAIL. The disclosed methods of making the PEG-TRAIL conjugates provide a homogeneous, highly pure, form of N-terminal modified PEG-TRAIL. Compared to native TRAIL, the PEG-TRAIL conjugates exhibits high solubility and solution stability. The PEG-TRAIL conjugates are useful in preventing and treating proliferative or autoimmune diseases.
    Type: Application
    Filed: April 25, 2016
    Publication date: September 29, 2016
    Inventors: Kang Choon Lee, Seulki Lee, Eun Ji Park
  • Patent number: 9451021
    Abstract: To provide a content provision service to a user in conjunction with an end terminal and a P2P management server, a request for content is received based on a content name input from a user. It is checked whether the content corresponding to the content name is stored or not, and if the content is not stored, the content name is transmitted to the P2P management server to request content location information. Upon receiving the content location information from the P2P management server, a request for the content is sent to an adjacent content providing device listed in the content location information. Then, the content is received from the adjacent content providing device and provided to the user.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: September 20, 2016
    Assignee: KT Corporation
    Inventors: Yongjoo Tcha, Seong-Choon Lee
  • Patent number: 9413822
    Abstract: Mobile P2P system includes mobile tracker node and super peer node. Mobile tracker node is located in dedicated wired network operating in conjunction with internet network to which plurality of peer nodes are connected, and manages information of plurality of mobile peer nodes connected to wireless access network. Peer list containing information on one or more peer nodes having content queried by plurality of mobile peer nodes is transmitted to mobile peer nodes, one or more peer nodes including mobile peer nodes and peer nodes on internet network. Super peer node is connected to mobile tracker node via wires, and located for each wireless access network. Super peer node forwards content query received from mobile peer nodes to the mobile tracker node, and receives the queried content from the peer nodes in the peer list received from the mobile tracker node and transmits the same to the mobile peer nodes.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: August 9, 2016
    Assignee: KT Corporation
    Inventors: Yongjoo Tcha, Seong-Choon Lee
  • Publication number: 20160210295
    Abstract: A method of ranking a plurality of regulated data sources and a plurality of non-regulated data sources for a data field is provided. The method evaluates consistency and assigns a ranking for a regulated data source based upon records having identical values and records having non-identical values for the data field in the regulated data source compared to other regulated data sources under analysis. The method further evaluates consistency and assigns a ranking for a non-regulated data source based upon records having identical values compared to other non-regulated data sources under analysis.
    Type: Application
    Filed: March 29, 2016
    Publication date: July 21, 2016
    Applicant: American Express Travel Related Services Company, Inc.
    Inventors: Young Choon Lee, Oliver Winslow Selwyn