Patents by Inventor Kwan Choi

Kwan 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: 20250065910
    Abstract: An apparatus for controlling an autonomous driving of a vehicle is introduced. The apparatus may comprise, a controller and memory storing instructions, when executed by the controller, configured to cause the apparatus to, receive global positioning system (GPS) information, High Definition (HD) map information, road information, and sensor information, wherein the GPS information, the HD map information, and the road information are related to one or more roads ahead of the vehicle, generate, based on the GPS information, the HD map information, road information, and the sensor information, road change information, wherein the road change information is related to whether a driving road which the vehicle travels on is changed to or from a road, and wherein the road is associated with a preset class, and output, based on the road change information, a signal for controlling the autonomous driving of the vehicle.
    Type: Application
    Filed: July 18, 2024
    Publication date: February 27, 2025
    Inventors: Bong Kwan Choi, Yea Bin Lee, Dae Sung Hwang, Da Yeon Park
  • Publication number: 20240421372
    Abstract: Provided are a regeneration solution of a spent secondary battery cathode material, the regeneration solution including p-type redox molecules, a solvent, and a lithium salt, in which the p-type redox molecules have a reduction potential that is higher than or equal to 1.55 volt (V) and lower than or equal to 3.7 V with respect to a reduction potential (vs Li/Li+) of lithium, a method of regenerating a cathode material and a regenerated cathode material using this, and a method of recycling the regeneration solution.
    Type: Application
    Filed: January 3, 2024
    Publication date: December 19, 2024
    Inventors: Min Ah LEE, Ji Hyun HONG, Hun Gi JUNG, Jin Kwan CHOI, Kyung Yoon CHUNG, Ui Chan HWANG
  • Patent number: 12055226
    Abstract: Proposed are directional control hydraulic valves and a system including the same, the system including: a first valve controlling a flow of a fluid flowing thereinto from a first input port by being interlocked with a solenoid valve that is switched to an excited (on) state or non-excited (off) state; and a second valve connected to the first valve and controlling a flow of the fluid flowing thereinto from the first valve by a fluid flowing thereinto from a second input port or a third input port, wherein at least a part of the fluid having been passed through the first valve is discharged through a first output port and then flows into the second input port or the third input port. In addition, the system including at least two directional control valves may be provide, whereby multiplexing of the system may be implemented.
    Type: Grant
    Filed: September 13, 2022
    Date of Patent: August 6, 2024
    Assignee: HANVIT INDUSTRIES CO., LTD.
    Inventors: Ha Kee Rhu, Jin Mo Kim, Kang Wan Yun, Byung-Kwan Choi
  • Patent number: 11990270
    Abstract: An aspect of the present disclosure provides a bus bar as a winding in a core of a transformer includes multiple sub-bars arranged horizontally and connected in parallel so as to minimize an AC current in the transformer, and the sub-bars have different widths and thus resistances or impedances with respect to a current flowing through the sub-bars are the same. Another aspect of the present disclosure provides a method of designing a bus bar for resistance or impedance matching between multiple sub-bars included in the bus bar to share a current to minimize an AC current in the transformer. Another aspect of the present disclosure provides a transformer, for a DC-DC converter for use in a vehicle, which is manufactured by the method of designing a bus bar.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: May 21, 2024
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventors: Tae Ho Bang, Deok Kwan Choi, Won Gon Kim, Min Heo, Ji Hoon Park, Kang Min Kim, A Ra Lee, Hyun Woo Shim, Du Ho Kim, Soo Min Jeon
  • Publication number: 20240149837
    Abstract: A sensor cleaning apparatus for a vehicle includes: a sensor housing in which a driver and a sensor are mounted, a cover part configured to rotate and exposed to the outside of the sensor housing through an open region formed on a front surface of the sensor housing, and a blade part connected to the cover part. The blade is rotated as the driver is driven and provided to allow air generated by its rotation to flow toward a front surface and a rear surface of the cover.
    Type: Application
    Filed: June 13, 2023
    Publication date: May 9, 2024
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, DY AUTO Corporation
    Inventors: Sang Heon Wang, Nak Kyoung Kong, Dong Eun Cha, Kyung Hwan Kim, Jung Kwan Choi
  • Publication number: 20240119850
    Abstract: A system and method for aircraft ground guidance and control are characterized by: inputting to a server and managing the GPS coordinate values, representing fixed location information, of all airfield lights that are installed within an airfield and can be controlled and monitored; determining whether the real-time coordinates of a moving aircraft on radars cross the fixed coordinates of the airfield lights; and specifying the location of the aircraft if the coordinates of the aircraft cross the fixed coordinates of the airfield lights, and guiding and controlling the airfield lights in the path of the aircraft. Accordingly, provided are the benefits of managing the GPS coordinate values representing fixed location information of airfield lights input to a server, accurately identifying the location of a moving aircraft if the real-time coordinates of the moving aircraft on radars cross the fixed coordinates of the airfield lights, and guiding and controlling the aircraft and airfield lights.
    Type: Application
    Filed: April 5, 2022
    Publication date: April 11, 2024
    Inventor: Byoung Kwan CHOI
  • Publication number: 20240078089
    Abstract: A system and a method including a receiving module configured to receive medical data from a medical institution server, a data extraction module configured to extract text data for a body region from the medical data, an image calling module configured to call or generate image data modeling from a position and a shape of the body region by using extracted text data, an object calling module configured to call the image data as an object, and a code editing module configured to write or edit a programming code for the body region corresponding to a called object according to a received input.
    Type: Application
    Filed: August 18, 2023
    Publication date: March 7, 2024
    Applicant: Pusan National University Industry-University Cooperation Foundation
    Inventor: Byung Kwan CHOI
  • Patent number: 11905302
    Abstract: The present disclosure relates to a prelithiation solution and a method for preparing a prelithiated anode using the same. The prelithiation solution and the method for preparing a prelithiated anode using the same according to the present disclosure allow uniform intercalation of lithium ions throughout the anode chemically in a solution via a simple process of immersing the anode in a prelithiation solution having a sufficiently low redox potential as compared to an anode active material. A prelithiated anode prepared by this method has an ideal initial coulombic efficiency and a lithium secondary battery with a high energy density can be prepared based thereon. In addition, the prepared anode is advantageously applicable to large-scale production due to superior stability even in dry air.
    Type: Grant
    Filed: December 14, 2020
    Date of Patent: February 20, 2024
    Assignee: Korea Institute of Science and Technology
    Inventors: Minah Lee, Jihyun Hong, Kyung Yoon Chung, Jin-Yoo Suh, Sang Ok Kim, Hyungseok Kim, Inyeong Kang, Ju Young Jang, Jin Kwan Choi
  • Patent number: 11884171
    Abstract: A low-voltage DC-DC converter (LDC) includes: an N-phase power circuit configured by connection of N DC-DC converters in parallel between a high-voltage (HV) battery and a low-voltage (LV) battery; and one output capacitor commonly connected to an output of each phase DC-DC converter. Each phase of the N-phase power circuit is controlled in an interleaving manner which delays a phase by 360°/N. Here, each N-phase power circuit is controlled by switching at a frequency of [(a frequency at which the parasitic resistance (equivalent series resistance (ESR)) of the output capacitor is minimized)/N]. The parasitic resistance of the output capacitor of the LDC can be minimized. Accordingly, a lifespan of a battery can be improved and efficiency of the DC-DC converter can be increased through the reduction of the equivalent series resistance (ESR) of the output capacitor.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: January 30, 2024
    Assignee: Hyundai Mobis Co., Ltd.
    Inventors: Ji Hoon Park, Deok Kwan Choi, Won Gon Kim, Kang Min Kim, Min Heo, Tae Ho Bang, Du Ho Kim, Hyun Woo Shim, Soo Min Jeon, A Ra Lee
  • Patent number: 11870360
    Abstract: The bidirectional insulating DC-DC converter shares high/low voltage terminals, a cooling passage, a housing, and a control board, and two independent step-down circuit (10) and step-up circuit (20) are formed in parallel to perform a bidirectional DC power conversion. A high voltage applied from a high voltage battery HV is stepped down through the step-down circuit (10) and output to a low voltage battery LV. On the other hand, a low voltage applied from the low voltage battery LV is stepped up through the step-up circuit (20) and output to the high voltage battery HV. The step-down circuit (10) is formed as an active clamp forward converter circuit, and the step-up circuit (20) is formed as an active clamp flyback converter circuit.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: January 9, 2024
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventors: Du Ho Kim, Deok Kwan Choi, Min Heo, Kang Min Kim, Soo Min Jeon, A Ra Lee, Won Gon Kim, Ji Hoon Park, Hyun Woo Shim, Tae Ho Bang
  • Publication number: 20230320805
    Abstract: A diagnostic kit tray is provided, which includes a tray body including a plurality of receiving recesses for storing diagnostic kits, and a tray cover coupled to an upper portion of the tray body to prevent foreign substances from penetrating into the receiving recesses, in which the tray body includes a lower plate including a plurality of recesses spaced apart from each other, and a locking member positioned at an edge of the lower plate and including a protrusion and a locking jaw to couple with the tray cover, and the tray cover includes a cover plate including a plurality of seating recesses to receive a portion of the diagnostic kit such that the diagnostic kit can be temporarily stored during use, and a coupling portion including a coupling recess to be coupled to the locking member.
    Type: Application
    Filed: September 23, 2021
    Publication date: October 12, 2023
    Inventors: Seong Doo OH, Seo Hwan MOON, Byung Kwan CHOI
  • Patent number: 11757364
    Abstract: The present disclosure relates to a new bidirectional low voltage DC-DC converter (LDC), that is, a DC-DC converter capable of satisfying a safety level required for an eco-friendly vehicle and an autonomous vehicle and improving power conversion performance, and a method and an apparatus for controlling the same. The LDC proposed in the present disclosure is a new concept bidirectional LDC in which a plurality of converters having the same power circuit topology are subjected to a parallel interleaving operation so as to enable both a buck operation and a boost operation, satisfy a high safety level, and improve power conversion performance. To this end, a plurality of bidirectional active-clamp flyback converters (for example, two or more bidirectional active-clamp flyback converters) are connected in parallel and are interleaved and controlled by a controller (for example, a microcomputer).
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: September 12, 2023
    Assignee: HYUNDAI MOBIS Co., Ltd.
    Inventors: Hyun Woo Shim, Deok Kwan Choi, Won Gon Kim, Min Heo, Kang Min Kim, A Ra Lee, Tae Ho Bang, Ji Hoon Park, Du Ho Kim, Soo Min Jeon
  • Patent number: 11672438
    Abstract: According to one aspect of the invention, there is provided a method for monitoring hemodynamics, comprising the steps of: acquiring information on a posture of a first subject wearing a monitoring device; estimating a motion artifact predicted to be included in a spectroscopic measurement signal from the first subject which is measured by the monitoring device, with reference to the acquired information on the posture of the first subject, and a motion artifact estimation model for defining a correlation between a posture of at least one subject and a motion artifact occurring in a signal measured from the at least one subject; and removing the estimated motion artifact from the measurement signal from the first subject.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: June 13, 2023
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Hyeon Min Bae, Jong Kwan Choi, Min Gyu Choi, Gun Pil Hwang, Min Su Ji, Jae Myoung Kim
  • Publication number: 20230178709
    Abstract: The present disclosure relates to a delithiation solution and a method for forming an anode active material or an anode using the same. By chemically extracting reactive lithium from a high-capacity anode active material or anode, which has high initial coulombic efficiency due to high lithium content but exhibits decreased stability in dry air or in a solvent for preparation of a slurry, stability can be improve and initial coulombic efficiency can be maintained high. In addition, the method for forming an anode active material or an anode according to the present disclosure can greatly reduce the cost and time required for delivery after production of a lithium-ion battery.
    Type: Application
    Filed: May 11, 2022
    Publication date: June 8, 2023
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Minah LEE, Jihyun HONG, Hun-Gi JUNG, Jin Kwan CHOI
  • Publication number: 20230178793
    Abstract: The present disclosure relates to an electrolyte operable in wide temperature ranges and a lithium battery including the same. By dissolving two or more lithium salts in a mixture solvent including three or more different acyclic alkyl carbonate compounds, reactivity with lithium metal and freezing point are decreased at the same time and, therefore, the lifetime characteristics and electrochemical performance of a lithium-ion battery, a lithium-metal battery, or a lithium-ion capacitor using the same are improved significantly.
    Type: Application
    Filed: May 2, 2022
    Publication date: June 8, 2023
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jihyun HONG, Minah LEE, Jin Kwan CHOI, Jina LEE
  • Patent number: 11645853
    Abstract: A driving lane determination method includes acquiring map information and driving environment information, deciding whether to perform driving lane determination entry based on the map information and the driving environment information, matching the map information and the driving environment information to calculate a matching point of each lane upon deciding the driving lane determination entry, deciding a matching lane based on the calculated matching point, deciding a tracking lane based on a prediction lane predicted from a previous driving lane and lane change determination upon deciding the matching lane, and deciding a final driving lane based on the decided matching lane and the decided tracking lane.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: May 9, 2023
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Da Yeon Park, Dong Gyu Noh, Su Lyun Sung, Dae Sung Hwang, Cho Rong Ryu, Bong Kwan Choi, Jun Ho Park, Joo Chul Bae, Su Ho Park, Seon Ho Kang, Hahk Rel Noh, Tae Jun Lee
  • Publication number: 20230119563
    Abstract: There is provided a method of providing information about prognosis after cardiac arrest. The method includes the steps of: calculating biological information based on a signal relating to a hemoglobin concentration measured from a cerebral region of a subject to be measured; and providing the information about the prognosis after cardiac arrest of the subject with reference to the calculated biological information and a biomarker relating to the prognosis after cardiac arrest measured from a blood of the subject.
    Type: Application
    Filed: March 5, 2021
    Publication date: April 20, 2023
    Applicants: SEOUL NATIONAL UNIVERSITY HOSPITAL, KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, OBE LAB., INC.
    Inventors: Sang Bae KO, Tae Jung KIM, Hyeon Min BAE, Jong Kwan CHOI, Jae Myoung KIM
  • Publication number: 20230003307
    Abstract: Proposed are directional control hydraulic valves and a system including the same, the system including: a first valve controlling a flow of a fluid flowing thereinto from a first input port by being interlocked with a solenoid valve that is switched to an excited (on) state or non-excited (off) state; and a second valve connected to the first valve and controlling a flow of the fluid flowing thereinto from the first valve by a fluid flowing thereinto from a second input port or a third input port, wherein at least a part of the fluid having been passed through the first valve is discharged through a first output port and then flows into the second input port or the third input port. In addition, the system including at least two directional control valves may be provide, whereby multiplexing of the system may be implemented.
    Type: Application
    Filed: September 13, 2022
    Publication date: January 5, 2023
    Applicant: HANVIT INDUSTRIES CO., LTD.
    Inventors: Ha Kee RHU, Jin Mo KIM, Kang Wan YUN, Byung-Kwan CHOI
  • Patent number: 11431253
    Abstract: A Low-voltage DC-DC Converter (LDC) includes a new bidirectional isolated LDC, in which two converters with different power circuit topologies operate in parallel in order to enable both buck mode and boost mode. The two applied converters are a phase-shift full-bridge converter with full-bridge synchronous rectification and an active-clamp forward converter. According to the present invention, it is possible to achieve the advantages of both a phase-shifted full-bridge converter with full-bridge synchronous rectification applied and an active clamping forward converter. Thus, it is possible to minimize output voltage and current ripples, thereby improving the quality of the LDC output power while minimizing electromagnetic waves generated while a product is operating.
    Type: Grant
    Filed: December 31, 2020
    Date of Patent: August 30, 2022
    Assignee: HYUNDAI MOBIS Co., Ltd.
    Inventors: Won Gon Kim, Deok Kwan Choi, Kang Min Kim, Min Heo, A Ra Lee, Tae Ho Bang, Hyun Woo Shim, Du Ho Kim, Soo Min Jeon, Ji Hoon Park
  • Publication number: 20220204957
    Abstract: Disclosed is a method of purifying a botulinum toxin comprising (a) pre-treating a culture solution containing a botulinum toxin, (b) purifying the pre-treated botulinum toxin using cation exchange chromatography, (c) purifying the botulinum toxin using hydrophobic chromatography, and (d) purifying the botulinum toxin using anion exchange chromatography. The method is capable of purifying a botulinum toxin with high purity and activity and is thus useful for botulinum toxin production.
    Type: Application
    Filed: April 14, 2020
    Publication date: June 30, 2022
    Inventors: Jae Young KIM, Jeong Sun NAM, Seungho KIM, Seung Kwan CHOI, Hyun Taek LIM, Jin Hee CHOI