Patents by Inventor Jung-Hyun Choi

Jung-Hyun 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).

  • Publication number: 20190280526
    Abstract: Disclosed is a magnetic induction power supply device, which switches the unit coil having the smallest number of windings to a rectification unit at the initial operation, thereby preventing the parts damaged due to an excessive inrush voltage. The disclosed magnetic induction power supply device switches the unit coil having the smallest number of windings to the rectification unit when emergency power is applied from a first power supply unit or a second power supply unit. The second power supply unit can supply the power source induced in the unit coils to a sensing unit as the emergency power.
    Type: Application
    Filed: October 19, 2017
    Publication date: September 12, 2019
    Inventors: Won-San NA, Jin-Pyo PARK, Jung-Hyun CHOI
  • Patent number: 10411254
    Abstract: The present disclosure relates to a negative electrode active material and a secondary battery including the same, and in particular, provides a negative electrode active material particle including a core including a carbon-based active material, and a shell surrounding the core and including a polymer, wherein silicon-based active material particles are embedded in the shell, and at least a part of the silicon-based active material particles is exposed to a surface of the shell.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: September 10, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Jung Hyun Choi, Yong Ju Lee, Eun Kyung Kim, Su Jin Park, Hyun Chul Kim
  • Publication number: 20190273247
    Abstract: Composite particles and a negative electrode active material including such particles for an electrochemical device. The negative electrode active material is capable of lithium intercalation/deintercalation and includes composite particles including a carbon phase including a carbonaceous material, silicon (Si) and lithium fluoride (LiF). The Si and LiF may be present as Si—LiF mixed particles, which are dispersed in the carbon phase, wherein the Si—LiF mixed particles are dispersed in the carbon phase with uniform or non-uniform distribution. In addition, the composite particles include the carbon phase mixed uniformly or amorphously with the Si—LiF mixed particles.
    Type: Application
    Filed: December 22, 2017
    Publication date: September 5, 2019
    Applicant: LG CHEM, LTD.
    Inventors: So-Ra LEE, Seo-Young KWON, Jee-Eun KIM, Ji-Young PARK, Pil-Kyu PARK, Hyeon-Min SONG, Kwi-Sub YUN, U-Jin YOON, Jae-Young LEE, Yong-Ju LEE, Jung-Hyun CHOI
  • Publication number: 20190257893
    Abstract: Disclosed are an apparatus and a method for diagnosing a failure of an electromagnetic-inductive power supply apparatus, which diagnoses whether a power-generation CT has failed by comparing the values detected in a sensor CT and the power-generation CT, thereby preventing the generating efficiency from being reduced. The disclosed apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus detects detection values of a power-generation CT and a sensor CT, converts detection values into converted value by scaling detection values, and diagnoses whether the current transformer has failed and whether the power-outage has occurred based on converted values.
    Type: Application
    Filed: October 11, 2017
    Publication date: August 22, 2019
    Inventors: Won-San NA, Jin-Pyo PARK, Jung-Hyun CHOI
  • Patent number: 10386987
    Abstract: A remote controller apparatus including: a communicator configured to communicate with an external device displaying a pointing object thereon; a sensor configured to sense a movement of the remote controller apparatus; and a controller configured to control movement of the pointing object based on the movement of the remote controller apparatus, determine position information corresponding to the movement of the remote controller apparatus with a first method when the remote controller apparatus operates in a first operating mode, determine the position information corresponding to the movement of the remote controller apparatus with a second method when the remote controller apparatus operates in a second operating mode, control the movement of the pointing object based on the position information, and change the operating mode of the remote controller apparatus in response to a preset event occurring.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: August 20, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung-hyun Choi, Yong-hoon Choi
  • Patent number: 10344120
    Abstract: The present invention relates to an aliphatic-aromatic copolyester resin composition with excellent hydrolysis resistance, wherein an unsaturated compound or an anhydride thereof is introduced into a molecular structure, and specifically, the aliphatic-aromatic copolyester resin composition can be manufactured into all molded products by extrusion, injection and the like, by solving problems with respect to physical properties, processability, reaction rates and water solubility of conventional biological resins.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: July 9, 2019
    Assignee: GIO-SOLTECH CO., LTD.
    Inventors: Ki Cheol Kim, Jung Hyun Choi
  • Publication number: 20180351160
    Abstract: The present invention relates to silicon-based active material-polymer composite which is secondary particles in which silicon-based particles as primary particles and conductive polymer particles having a modulus of elasticity of 10 Pa to 100 Pa at a temperature of 20° C. to 40° C. are uniformly mixed.
    Type: Application
    Filed: March 8, 2017
    Publication date: December 6, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Rae Hwan Jo, Eun Kyung Kim, Yong Ju Lee, Su Jin Park, Hyun Chul Kim, Jung Hyun Choi
  • Publication number: 20180342757
    Abstract: The present invention relates to a negative electrode active material which includes a secondary particle including a first particle which is a primary particle, wherein the first particle includes a first core and a first surface layer which is disposed on a surface of the first core and contains carbon, and the first core includes a metal compound which includes one or more of a metal oxide and a metal silicate and one or more of silicon and a silicon compound; a method of preparing the same; an electrode including the same; and a lithium secondary battery including the same.
    Type: Application
    Filed: June 2, 2017
    Publication date: November 29, 2018
    Applicant: LG CHEM, LTD.
    Inventors: Jung Hyun CHOI, Yong Ju LEE, Eun Kyung KIM
  • Publication number: 20180323425
    Abstract: The present invention relates to a negative electrode active material including a secondary particle in which primary particles are aggregated, wherein the primary particle includes: a core including one or more of silicon and a silicon compound; and a surface layer which is disposed on a surface of the core and contains carbon, wherein an average particle size D50 of the core is in a range of 0.5 ?m to 20 ?m, a method of preparing the same, an electrode including the same, and a lithium secondary battery including the same.
    Type: Application
    Filed: June 2, 2017
    Publication date: November 8, 2018
    Applicant: LG CHEM, LTD.
    Inventors: Jung Hyun CHOI, Yong Ju LEE, Eun Kyung KIM
  • Publication number: 20180226640
    Abstract: The present invention relates to a negative electrode active material, a method of preparing the same, and a lithium secondary battery including the same. In particular, the present invention relates to a composite negative electrode active material that includes: a core capable of intercalating and deintercalating lithium ions; and a plurality of coating layers comprising two or more Si layers having different densities formed on a surface of the core, and thus has enhanced stability by minimizing the formation of cracks occurring by the repetition of charging and discharging, a method of preparing the same, and a lithium secondary battery including the same and thus exhibiting enhanced lifespan characteristics.
    Type: Application
    Filed: March 6, 2017
    Publication date: August 9, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Jung Hyun Choi, Yong Ju Lee, Eun Kyung Kim
  • Publication number: 20180219216
    Abstract: The present invention relates to a silicon-carbon-based composite negative electrode active material, and a negative electrode for a secondary battery and a lithium secondary battery including the same, and particularly to a silicon-carbon-based composite negative electrode active material, in which physical stability is improved by including a carbon-based core capable of intercalating and deintercalating lithium ions and at least one silicon particle included in the carbon-based core and disposed in the form of being distributed in an outer portion of the carbon-based core, and a negative electrode for a secondary battery and a lithium secondary battery in which life characteristics are improved by including the same.
    Type: Application
    Filed: April 20, 2017
    Publication date: August 2, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Jung Hyun Choi, Yong Ju Lee, Eun Kyung Kim
  • Publication number: 20180219225
    Abstract: The present invention relates to a negative electrode active material and a secondary battery including the same, and specifically, provides a negative electrode active material particle including a core, which includes a carbon-based active material and an oxygen functional group, and a shell, which surrounds the core and includes a silicon-based active material.
    Type: Application
    Filed: October 17, 2016
    Publication date: August 2, 2018
    Applicant: LG CHEM, LTD.
    Inventors: Jung Hyun CHOI, Yong Ju LEE, Eun Kyung KIM, Hyun Chul KIM
  • Patent number: 9956130
    Abstract: There is provided an upper limb rehabilitation robot including: a base frame that has a side to which a connecting support is rotatably laterally connected; a connecting shaft unit that is rotatably disposed at a side of the connecting support; a link unit that has a side coupled to the connecting shaft unit and the other side with an upper limb connector mounted to enable a person who needs rehabilitation to connect an upper limb; an active actuator that rotates a connecting shaft unit; and a manual actuator that generates resistant torque against rotation to the connecting shaft unit.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: May 1, 2018
    Assignee: Daegu Gyeongbuk Institute of Science and Technology
    Inventors: Jinung An, Yoon Gu Kim, Gwang Hee Jang, Jung Hyun Choi
  • Patent number: 9882333
    Abstract: An apparatus for an assembly process, where in a flexible object is moved by a manipulator to be engaged with a connector, including: a body provided in the manipulator and moved toward the connector; a driving part provided inside of the body; a moving part provided under the body and moved up and down by the driving part to press and grip a flexible object; and a fixing part with one end provided under the body, the other end positioned under the moving part, and a top surface including a support plate to be mounted with the flexible object.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: January 30, 2018
    Assignee: Daegu Gyeongbuk Institute of Science and Technology
    Inventors: Sang-Mun Lee, Jinung An, Dae-han Hong, Jeong Hwan Kwak, Jung-Hyun Choi
  • Publication number: 20170309902
    Abstract: Provided are a negative electrode active material for a lithium secondary battery and a method of preparing the same, wherein since the negative electrode active material includes porous polycrystalline silicon and the porous polycrystalline silicon includes pores disposed at grain boundaries, the negative electrode active material may exhibit a buffering action by internally absorbing changes in volume of the active material during charge and discharge. As a result, lifetime characteristics of a negative electrode and a battery may be improved.
    Type: Application
    Filed: October 1, 2015
    Publication date: October 26, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Rae Hwan Jo, Ju Ho Chung, Eun Kyung Kim, Yong Ju Lee, Seung Youn Choi, Hyun Chul Kim, Jung Hyun Choi
  • Publication number: 20170222222
    Abstract: The present invention relates to a negative electrode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery including the negative electrode active material, wherein since the negative electrode active material includes a surface-treated silicon nanoparticle and the surface-treated silicon nanoparticle includes a silicon nanoparticle and a surface treatment layer which is disposed on a surface of the silicon nanoparticle and includes crystalline SiO2, the negative electrode active material may exhibit significantly improved initial efficiency characteristics as well as excellent lifetime and capacity characteristics when used in a battery.
    Type: Application
    Filed: October 1, 2015
    Publication date: August 3, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Yong Ju Lee, Seung Youn Choi, Rae Hwan Jo, Eun Kyung Kim, Hyun Chul Kim, Jung Hyun Choi
  • Publication number: 20170133671
    Abstract: The present disclosure relates to a negative electrode active material and a secondary battery including the same, and in particular, provides a negative electrode active material particle including a core including a carbon-based active material, and a shell surrounding the core and including a polymer, wherein silicon-based active material particles are embedded in the shell, and at least a part of the silicon-based active material particles are exposed to a surface of the shell.
    Type: Application
    Filed: October 17, 2016
    Publication date: May 11, 2017
    Applicant: LG CHEM, LTD.
    Inventors: Jung Hyun CHOI, Yong Ju LEE, Eun Kyung KIM, Su Jin PARK, Hyun Chul KIM
  • Publication number: 20160297075
    Abstract: An apparatus for an assembly process, where in a flexible object is moved by a manipulator to be engaged with a connector, including: a body provided in the manipulator and moved toward the connector; a driving part provided inside of the body; a moving part provided under the body and moved up and down by the driving part to press and grip a flexible object; and a fixing part with one end provided under the body, the other end positioned under the moving part, and a top surface including a support plate to be mounted with the flexible object.
    Type: Application
    Filed: February 23, 2016
    Publication date: October 13, 2016
    Applicant: Daegu Gyeongbuk Institute of Science and Technology
    Inventors: Sang-Mun LEE, Jinung AN, Dae-han HONG, Jeong Hwan KWAK, Jung-Hyun CHOI
  • Publication number: 20160182858
    Abstract: A multivision display apparatus which enables participants who conduct a video conference to conduct the video conference in a manner in which the participants keep eye contact with each other. The multivision display apparatus includes a plurality of display apparatuses which output images, a bezel provided on an edge of each of the plurality of display apparatuses, a light receiving device which is provided on the bezel positioned at the center of a screen formed with the plurality of display apparatuses to have a vertical length, and receives an image, and an image receiving device which is provided on an upper end of the bezel to be connected to the light receiving device, receives the image received by the light receiving device, generates image data, and transmits the image data to the display apparatuses.
    Type: Application
    Filed: October 16, 2015
    Publication date: June 23, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung Hyun CHOI, Hyoung Hak Kim, Dai Boong Lee
  • Publication number: 20160110057
    Abstract: A remote controller apparatus including: a communicator configured to communicate with an external device displaying a pointing object thereon; a sensor configured to sense a movement of the remote controller apparatus; and a controller configured to control movement of the pointing object based on the movement of the remote controller apparatus, determine position information corresponding to the movement of the remote controller apparatus with a first method when the remote controller apparatus operates in a first operating mode, determine the position information corresponding to the movement of the remote controller apparatus with a second method when the remote controller apparatus operates in a second operating mode, control the movement of the pointing object based on the position information, and change the operating mode of the remote controller apparatus in response to a preset event occurring.
    Type: Application
    Filed: October 15, 2015
    Publication date: April 21, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung-hyun CHOI, Yong-hoon CHOI