Patents by Inventor Kwang-sik Choi

Kwang-sik Choi 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: 10405446
    Abstract: An electronic device including a waterproof structure is provided. The electronic device includes a housing that includes a first face, a second face that faces in a direction substantially opposite to the first face, and a side surface that at least partially encloses a space between the first face and the second face, a middle plate arranged between the first face and the second face inside the housing to be substantially parallel to the first face, extending from the side surface, and including at least one opening, a printed circuit board arranged between the middle plate and the second face, a display arranged between the middle plate and the first face, and including a face directed toward the second face, and a seal member configured to hermetically seal the at least one opening of the middle plate, and arranged between the face of the display and the middle plate.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: September 3, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-Min Choi, Woong-Chan Kim, Daehyeong Park, Sung-Gun Cho, Sung-Joo Cho, Young-Sik Choi, Kwang-Hwan Kim, Soonwoong Yang, Min-Sung Lee, Seungjoon Lee, Yuchul Chang
  • Publication number: 20190259728
    Abstract: A method for transferring a micro device, includes: a compression step in which a carrier film having a micro-device attached to an adhesive layer thereof is brought into contact with a substrate comprising a solder deposited on metal electrodes formed on the substrate and is compressed on the substrate; a first adhesive strength generation step in which the solder disposed between the micro-device and the metal electrodes is compressed in the compression step to generate first adhesive strength between the micro-device and the solder; a second adhesive generation step in which the micro-device is bonded to the adhesive layer through press-fitting in the compression step to generate second adhesive strength between the micro-device and the adhesive layer; and a release step in which the carrier film is separated from the substrate, with the micro-device adhered to the solder.
    Type: Application
    Filed: August 21, 2017
    Publication date: August 22, 2019
    Applicant: CENTER FOR ADVANCED META-MATERIALS
    Inventors: Yun HWANGBO, Byung Ik CHOI, Jae Hyun KIM, Yeon Woo JEONG, Seong Min HONG, Bong Kyun JANG, Kwang Seop KIM, Kyung Sik KIM, Hak Joo LEE
  • Patent number: 10366044
    Abstract: A PCIe device for supporting SRIS includes a transceiver, a clock signal generator configured to generate a second reference clock signal, a connector in a structure to be connected to a PCIe host, and a selection circuit configured to determine whether a first reference clock signal is supplied through the connector and transmit one of the first reference clock signal and the second reference clock signal to the transceiver according to a result of the determination.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: July 30, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kwang Hee Choi, Dae Sik Park
  • Patent number: 9893358
    Abstract: A binder composition for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. The binder composition includes lithium polyacrylate and a solvent and has a viscosity of about 500 cps to about 5000 cps.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: February 13, 2018
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Chang-Ui Jeong, Byung-Joo Chung, Nam-Seon Kim, Yang-soo Kim, Kwang-Sik Choi
  • Patent number: 9838228
    Abstract: There are provided a device for removing partial discharge noise and a method of diagnosing the same.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: December 5, 2017
    Assignee: KOREA ELECTRIC POWER CORPORATION
    Inventors: Kwang Sik Choi, Jung Cheol Seo
  • Patent number: 9768448
    Abstract: A binder composition for a rechargeable lithium battery includes: an interpenetrating polymer network (IPN) structure including a cyclic polymer including a structural unit represented by Chemical Formula 1 or a structural unit represented by Chemical Formula 2, and polyacrylamide. A method of preparing the same, and an electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are also disclosed. In Chemical Formulae 1 and 2, R1 to R3, R11 to R16, and n and m are the same as defined in the detailed description.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: September 19, 2017
    Assignees: Samsung SDI Co., Ltd., Aekyung Chemical Co., Ltd.
    Inventors: Byung-Joo Chung, Yeon-Hee Yoon, Nam-Seon Kim, Kwang-Sik Choi, Soo-Jung Kim
  • Patent number: 9434682
    Abstract: Disclosed are a novel reactive mesogen compound having superior thermostability, high birefringence and a simple preparation process while possessing unique liquid crystal characteristics having molecular orientation by forming a polymer network through photopolymerization, and a method of preparing the same. The novel reactive mesogen compound according to the present invention is represented by Formula 3 below.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: September 6, 2016
    Assignee: Aekyung Chemical Co., Ltd.
    Inventors: Yoon-Tae Jeon, Do-Yeon Kim, Yun-Sun Do, Gi-Woo Lee, Hueong-Nam Park, Kwang-Sik Choi
  • Patent number: 9413012
    Abstract: A binder for a rechargeable lithium battery includes a copolymer having a weight average molecular weight of about 10,000 to about 500,000 and including a repeating unit represented by Chemical Formula X and a repeating unit represented by Chemical Formula Y-1: The binder may be used in preparing an electrode for a rechargeable lithium battery and a rechargeable lithium battery including the electrode exhibits improved stability, rate capability, and cycle-life.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: August 9, 2016
    Assignee: Aekyung Chemical Co., Ltd.
    Inventors: Byung-Joo Chung, Eon-Mi Lee, Nam-Seon Kim, Yang-Soo Kim, Kwang-Sik Choi
  • Patent number: 9406937
    Abstract: A binder composition for a rechargeable lithium battery includes a semi-interpenetrating polymer network (semi-IPN) including a copolymer including a repeating unit represented by the following Chemical Formula 1 and a repeating unit represented by the following Chemical Formula 2 and polyacrylamide, and polyalkylene glycol. In Chemical Formula 1, R1 and R2 are the same or different and are independently selected from hydrogen, or a substituted or unsubstituted C1 to C10 alkyl group, and R3 and R4 are an alkali metal. In Chemical Formula 2, R5 to R8 are the same or different, and are independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C1 to C30 alkoxy group.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: August 2, 2016
    Assignee: AEKYUNG CHEMICAL CO., LTD.
    Inventors: Byung-Joo Chung, Eon-Mi Lee, Seung-Uk Kwon, Jae-Hyuk Kim, Soon-Sung Suh, Chang-Ui Jeong, Ha-Na Yoo, Nam-Seon Kim, Yang-Soo Kim, Kwang-Sik Choi
  • Patent number: 9368797
    Abstract: A binder composition for a rechargeable lithium battery includes a semi-interpenetrating polymer network (semi-IPN) including a copolymer including a repeating unit represented by the following Chemical Formula 1 and a repeating unit represented by the following Chemical Formula 2, and polyacrylamide. In Chemical Formula 1, R1 and R2 are the same or different and are independently selected from hydrogen, or a substituted or unsubstituted C1 to C10 alkyl group, and R3 and R4 are an alkali metal. In Chemical Formula 2, R5 to R8 are the same or different, and are independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C1 to C30 alkoxy group.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: June 14, 2016
    Assignees: SAMSUNG SDI CO., LTD., AEKYUNG CHEMICAL CO., LTD.
    Inventors: Byung-Joo Chung, Eon-Mi Lee, Seung-Uk Kwon, Jae-Hyuk Kim, Soon-Sung Suh, Chang-Ui Jeong, Ha-Na Yoo, Nam-Seon Kim, Yang-Soo Kim, Kwang-Sik Choi
  • Publication number: 20160036056
    Abstract: A binder composition for a rechargeable lithium battery includes: an interpenetrating polymer network (IPN) structure including a cyclic polymer including a structural unit represented by Chemical Formula 1 or a structural unit represented by Chemical Formula 2, and polyacrylamide. A method of preparing the same, and an electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are also disclosed. In Chemical Formulae 1 and 2, R1 to R3, R11 to R16, and n and m are the same as defined in the detailed description.
    Type: Application
    Filed: July 23, 2015
    Publication date: February 4, 2016
    Inventors: Byung-Joo Chung, Yeon-Hee Yoon, Nam-Seon Kim, Kwang-Sik Choi, Soo-Jung Kim
  • Patent number: 9221558
    Abstract: Provided is a satellite navigation visibility calculation apparatus. The satellite navigation visibility calculation apparatus includes a processing unit configured to binarize an input sky view image to create an binary image, an extraction unit configured to extract a plurality of feature points from the binary image, and a calculation unit configured to calculate satellite navigation dilution of precision (DOP) corresponding to the sky view image using the plurality of feature points.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: December 29, 2015
    Assignee: Korea Aerospace Research Institute
    Inventors: Woon Ki Hong, Eun Sung Lee, Kwang Sik Choi, Moon Beom Heo, Gi Wook Nam
  • Publication number: 20150361033
    Abstract: Disclosed are a novel reactive mesogen compound having superior thermostability, high birefringence and a simple preparation process while possessing unique liquid crystal characteristics having molecular orientation by forming a polymer network through photopolymerization, and a method of preparing the same. The novel reactive mesogen compound according to the present invention is represented by Formula 3 below.
    Type: Application
    Filed: July 22, 2015
    Publication date: December 17, 2015
    Inventors: Yoon-Tae Jeon, Do-Yeon Kim, Yun-Sun Do, Gi-Woo Lee, Hueong-Nam Park, Kwang-Sik Choi
  • Publication number: 20150118556
    Abstract: A binder composition for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. The binder composition includes lithium polyacrylate and a solvent and has a viscosity of about 500 cps to about 5000 cps.
    Type: Application
    Filed: August 29, 2014
    Publication date: April 30, 2015
    Inventors: Chang-Ui Jeong, Byung-Joo Chung, Nam-Seon Kim, Yang-soo Kim, Kwang-Sik Choi
  • Publication number: 20150010815
    Abstract: A binder composition for a rechargeable lithium battery includes a semi-interpenetrating polymer network (semi-IPN) including a copolymer including a repeating unit represented by the following Chemical Formula 1 and a repeating unit represented by the following Chemical Formula 2, and polyacrylamide. In Chemical Formula 1, R1 and R2 are the same or different and are independently selected from hydrogen, or a substituted or unsubstituted C1 to C10 alkyl group, and R3 and R4 are an alkali metal. In Chemical Formula 2, R5 to R8 are the same or different, and are independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C1 to C30 alkoxy group.
    Type: Application
    Filed: December 23, 2013
    Publication date: January 8, 2015
    Applicants: Aekyung Chemical Co., Ltd., SAMSUNG SDI CO., LTD.
    Inventors: Byung-Joo CHUNG, Eon-Mi LEE, Seung-Uk KWON, Jae-Hyuk KIM, Soon-Sung SUH, Chang-Ui JEONG, Ha-Na YOO, Nam-Seon KIM, Yang-Soo KIM, Kwang-Sik CHOI
  • Publication number: 20150010816
    Abstract: A binder composition for a rechargeable lithium battery includes a semi-interpenetrating polymer network (semi-IPN) including a copolymer including a repeating unit represented by the following Chemical Formula 1 and a repeating unit represented by the following Chemical Formula 2 and polyacrylamide, and polyalkylene glycol. In Chemical Formula 1, R1 and R2 are the same or different and are independently selected from hydrogen, or a substituted or unsubstituted C1 to C10 alkyl group, and R3 and R4 are an alkali metal. In Chemical Formula 2, R5 to R8 are the same or different, and are independently hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C1 to C30 alkoxy group.
    Type: Application
    Filed: December 23, 2013
    Publication date: January 8, 2015
    Applicants: AEKYUNG CHEMICAL CO., LTD, SAMSUNG SDI CO., LTD.
    Inventors: Byung-Joo CHUNG, Eon-Mi LEE, Seung-Uk KWON, Jae-Hyuk KIM, Soon-Sung SUH, Chang-Ui JEONG, Ha-Na YOO, Nam-Seon KIM, Yang-Soo KIM, Kwang-Sik CHOI
  • Publication number: 20140272575
    Abstract: Embodiments are directed to a binder for a rechargeable lithium battery, the binder including a copolymer including a repeating unit represented by Chemical Formula X, a repeating unit represented by Chemical Formula Y-1, and a repeating unit represented by Chemical Formula Z, and lithium ions, where Chemical Formula X, Chemical Formula Y-1, and Chemical Formula Z are as described herein.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 18, 2014
    Applicants: AEKYUNG CHEMICAL CO., LTD., SAMSUNG SDI CO., LTD.
    Inventors: Eon-Mi LEE, Byung-Joo CHUNG, Nam-Seon KIM, Yang-Soo KIM, Kwang-Sik CHOI
  • Publication number: 20140233686
    Abstract: There are provided a device for removing partial discharge noise and a method of diagnosing the same.
    Type: Application
    Filed: September 28, 2012
    Publication date: August 21, 2014
    Applicant: KOREA ELECTRIC POWER CORPORATION
    Inventors: Kwang Sik Choi, Jung Cheol Seo
  • Publication number: 20140205899
    Abstract: A binder for a rechargeable lithium battery includes a copolymer having a weight average molecular weight of about 10,000 to about 500,000 and including a repeating unit represented by Chemical Formula X and a repeating unit represented by Chemical Formula Y-1: The binder may be used in preparing an electrode for a rechargeable lithium battery and a rechargeable lithium battery including the electrode exhibits improved stability, rate capability, and cycle-life.
    Type: Application
    Filed: January 10, 2014
    Publication date: July 24, 2014
    Applicants: AEKYUNG CHEMICAL CO., LTD., SAMSUNG SDI CO., LTD.
    Inventors: Byung-Joo Chung, Eon-Mi Lee, Nam-Seon Kim, Yang-Soo Kim, Kwang-Sik Choi
  • Publication number: 20140185940
    Abstract: Provided is a satellite navigation visibility calculation apparatus. The satellite navigation visibility calculation apparatus includes a processing unit configured to binarize an input sky view image to create an binary image, an extraction unit configured to extract a plurality of feature points from the binary image, and a calculation unit configured to calculate satellite navigation dilution of precision (DOP) corresponding to the sky view image using the plurality of feature points.
    Type: Application
    Filed: November 27, 2013
    Publication date: July 3, 2014
    Applicant: Korea Aerospace Research Institute
    Inventors: Woon Ki Hong, Eun Sung Lee, Kwang Sik Choi, Moon Beom Heo, Gi Wook Nam