Patents by Inventor Yun Young Choi

Yun Young 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: 20240240279
    Abstract: A method for producing an aqueous solution containing nickel, cobalt and manganese, includes: a leaching process including a pressure-leaching process of leaching a raw material under pressure to form a leachate containing nickel, cobalt, manganese and impurities; an impurity removal process of removing the impurities from the leachate; a target substance precipitation process of precipitating a mixed hydroxide precipitate containing nickel, cobalt and manganese by introducing a neutralizing agent into a filtrate from which the impurities are removed; and a dissolution process. The pressure-leaching process includes a first-stage pressure-leaching process and a second-stage pressure-leaching process of pressure-leaching a residue of the first-stage pressure-leaching process with an acidity higher than an acidity in the first-stage pressure-leaching process.
    Type: Application
    Filed: September 22, 2023
    Publication date: July 18, 2024
    Inventors: Heon Sik CHOI, Yun Birm CHOI, Chang Young CHOI, James Soung CHOI
  • Publication number: 20230003801
    Abstract: An apparatus for estimating a state of a battery includes a memory configured to store a program of a neural network including a plurality of pre-trained predictive models and an adaptive hidden layer; and includes at least one processor configured to execute the program. The program includes an instruction for receiving battery data of a target battery, inputting the battery data to the adaptive hidden layer, selecting one predictive model from the plurality of pre-trained predictive models through the adaptive hidden layer, inputting the battery data to the selected predictive model, and outputting prediction data for a remaining useful life of the target battery through the selected predictive model.
    Type: Application
    Filed: April 26, 2022
    Publication date: January 5, 2023
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Jaekyung Oh, Won Jae Choi, Ju Seok Kim, Chulkyu Lee, Hee Yeon Ryu, Bohyun Lee, Yun Young Choi, Seongyoon Kim, Jung-Il Choi
  • Patent number: 11069913
    Abstract: The present exemplary embodiments disclose a redox flow battery. The present exemplary embodiments disclose a redox flow battery which forms a mixing space for mixing an active material in a porous electrode to improve a ununiform concentration of the active material, thereby improving an energy efficiency by reducing an over-potential and increasing an area of the stack and an output thereof.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: July 20, 2021
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Jung Il Choi, Yun Young Choi, Min Gyu Yang
  • Publication number: 20200185748
    Abstract: The present exemplary embodiments disclose a redox flow battery. The present exemplary embodiments disclose a redox flow battery which forms a mixing space for mixing an active material in a porous electrode to improve a ununiform concentration of the active material, thereby improving an energy efficiency by reducing an over-potential and increasing an area of the stack and an output thereof.
    Type: Application
    Filed: February 14, 2019
    Publication date: June 11, 2020
    Inventors: Jung Il CHOI, Yun Young CHOI, Min Gyu YANG
  • Patent number: 10292603
    Abstract: A method of measuring blood pressure, including: sensing an atmospheric pressure, an applied pressure, and a blood pressure of a blood vessel delivered to a skin and outputting an electrical signal indicating a result of sensing the pressures; dividing the electrical signal into a divided electrical signal which includes a direct current (DC) signal and an alternating current (AC) signal; processing the divided electrical signal; calculating the applied pressure using the processed electrical signal; and calculating a blood pressure average using the calculated applied pressure and a swing value of the processed electrical signal.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: May 21, 2019
    Assignee: UMEDIX CORPORATION LIMITED
    Inventors: Sung Hun Woo, Yun Young Choi, Yun Seok Chang
  • Publication number: 20180228379
    Abstract: A method of measuring blood pressure, including: sensing an atmospheric pressure, an applied pressure, and a blood pressure of a blood vessel delivered to a skin and outputting an electrical signal indicating a result of sensing the pressures; dividing the electrical signal into a divided electrical signal which includes a direct current (DC) signal and an alternating current (AC) signal; processing the divided electrical signal; calculating the applied pressure using the processed electrical signal; and calculating a blood pressure average using the calculated applied pressure and a swing value of the processed electrical signal.
    Type: Application
    Filed: April 16, 2018
    Publication date: August 16, 2018
    Applicant: UMEDIX CORPORATION LIMITED
    Inventors: Sung Hun WOO, Yun Young CHOI, Yun Seok CHANG
  • Patent number: 9974447
    Abstract: According to an aspect of the present invention, there is provided a blood pressure measuring apparatus including a pressure sensor unit configured to sense an atmospheric pressure, an applied pressure, and a blood pressure of a blood vessel delivered to a skin and output an electrical signal indicating a result of sensing the pressures, while in contact with the skin; a signal division unit configured to receive the electrical signal and divide the electrical signal into a divided electrical signal which includes a direct current (DC) signal and an alternating current (AC) signal; a signal processor unit configured to process the divided electrical signal; and a blood pressure calculation unit configured to calculate the applied pressure using the processed electrical signal and calculate a blood pressure average using the calculated applied pressure and a swing value of the electrical.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: May 22, 2018
    Assignee: UMEDIX CORPORATION LIMITED
    Inventors: Sung Hun Woo, Yun Young Choi, Yun Seok Chang
  • Publication number: 20140364747
    Abstract: According to an aspect of the present invention, there is provided a blood pressure measuring apparatus including a pressure sensor unit configured to sense an atmospheric pressure, an applied pressure, and a blood pressure of a blood vessel delivered to a skin and output an electrical signal indicating a result of sensing the pressures, while in contact with the skin; a signal division unit configured to receive the electrical signal and divide the electrical signal into a divided electrical signal which includes a direct current (DC) signal and an alternating current (AC) signal; a signal processor unit configured to process the divided electrical signal; and a blood pressure calculation unit configured to calculate the applied pressure using the processed electrical signal and calculate a blood pressure average using the calculated applied pressure and a swing value of the electrical.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 11, 2014
    Inventors: Sung Hun WOO, Yun Young CHOI, Yun Seok CHANG
  • Publication number: 20120256868
    Abstract: An apparatus for sensing a touch which can determine a touch and touch sensitivity thereof in a capacitance-type touch panel. The apparatus for sensing a touch includes a first amplifier having first and second input terminals for outputting a difference of a first input voltage being applied to the first input terminal and a second input voltage being applied to the second input terminal, a second amplifier for amplifying and outputting the difference from the first amplifier, a converting unit for converting an output from the second amplifier into a digital signal and outputting the digital signal, and a control unit for interpreting an output from the converting unit to output a control signal for adjusting impedance of the second input terminal.
    Type: Application
    Filed: August 5, 2011
    Publication date: October 11, 2012
    Inventors: Yun Young CHOI, Sang Hyub/Kang, Jin Seok/Koh, Jong Hwa/Lee
  • Patent number: 8259889
    Abstract: An apparatus and method for frequency synthesis using a Delay Locked Loop (DLL) are provided. The apparatus includes the DLL, an edge pulse generator, and an inductive-capacitive (LC) tank switch. If phases of a reference frequency signal and a feedback signal are the same and thus are locked, the DLL delays the reference frequency signal. The edge pulse generator generates a plurality of pulse signals representing phase delay amounts of signals. The LC tank switch combines the plurality of pulse signals and generates frequency.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: September 4, 2012
    Assignee: Samsung Electronics co., Ltd.
    Inventors: Yun-Young Choi, Hoon-Tae Kim
  • Patent number: 8208887
    Abstract: Provided are a receiving circuit including a balun circuit and a notch filter, and an operating method thereof. The receiving circuit includes a transformer, a notch filter, and a mixer. The transformer converts a single input signal to a differential input signal using a first tap. The notch filter blocks a specific frequency band of the single input signal by connecting a second tap with the first tap of the transformer using a condenser.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: June 26, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hee-Hyun Lee, Yun-Young Choi, Jong-Won Choi, Hoon-Tae Kim
  • Publication number: 20110260762
    Abstract: An apparatus and a method for calibrating a Voltage Controlled Oscillator (VCO) using a fast frequency comparison based on phase manipulation are provided. The calibrating apparatus includes a phase shifter for comparing an input reference frequency and an input divided frequency and shifting a phase of the reference frequency to make the phase of the reference frequency align with a phase of the divided frequency; a frequency comparator for determining which one of the phase-shifted reference frequency and the divided frequency is higher; and a cap-bank control for determining a frequency to use based on a comparison result of the frequency comparator.
    Type: Application
    Filed: October 7, 2009
    Publication date: October 27, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yun-Young Choi, Hoon-Tae Kim
  • Publication number: 20100136942
    Abstract: Provided are a receiving circuit including a balun circuit and a notch filter, and an operating method thereof. The receiving circuit includes a transformer, a notch filter, and a mixer. The transformer converts a single input signal to a differential input signal using a first tap. The notch filter blocks a specific frequency band of the single input signal by connecting a second tap with the first tap of the transformer using a condenser.
    Type: Application
    Filed: May 22, 2009
    Publication date: June 3, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hee-Hyun Lee, Yun-Young Choi, Jong-Won Choi, Hoon-Tae Kim
  • Patent number: 7638059
    Abstract: The present invention relates to an oxygen isotope separation system and a method therefor. More specifically, the invention relates to a newly invented pressure-driven AGMD (Air Gap Membrane Distillation) system applied to a multi-stage membrane distillation cells which can produce an oxygen isotope effectively and economically, and a method therefor. The invention provides an oxygen isotope separation system including a number of Air Gap Membrane Distillation (AGMD) permeation cells connected in series to separate a feed into a product and a tail, wherein each of the AGMD cell is connected at a tail outlet with a reflux pump and at a product outlet, whereby the product from (i?1)th cell and the tail from (i+1)th cell are pumped as the feed into ith cell.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: December 29, 2009
    Assignee: Korea Atomic Energy Research Institute
    Inventors: JaeWoo Kim, Hwa-Rim Choi, Dae-Shik Chang, Yun-Young Choi
  • Publication number: 20090168942
    Abstract: An apparatus and method for frequency synthesis using a Delay Locked Loop (DLL) are provided. The apparatus includes the DLL, an edge pulse generator, and an inductive-capacitive (LC) tank switch. If phases of a reference frequency signal and a feedback signal are the same and thus are locked, the DLL delays the reference frequency signal. The edge pulse generator generates a plurality of pulse signals representing phase delay amounts of signals. The LC tank switch combines the plurality of pulse signals and generates frequency.
    Type: Application
    Filed: December 23, 2008
    Publication date: July 2, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Yun-Young Choi, Hoon-Tae Kim
  • Publication number: 20080185283
    Abstract: The present invention relates to an oxygen isotope separation system and a method therefor. More specifically, the invention relates to a newly invented pressure-driven AGMD (Air Gap Membrane Distillation) system applied to a multi-stage membrane distillation cells which can produce an oxygen isotope effectively and economically, and a method therefor. The invention provides an oxygen isotope separation system including a number of Air Gap Membrane Distillation (AGMD) permeation cells connected in series to separate a feed into a product and a tail, wherein each of the AGMD cell is connected at a tail outlet with a reflux pump and at a product outlet, whereby the product from (i?1)th cell and the tail from (i+1)th cell are pumped as the feed into ith cell.
    Type: Application
    Filed: February 2, 2007
    Publication date: August 7, 2008
    Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: JaeWoo Kim, Hwa-Rim Choi, Dae-Shik Chang, Yun-Young Choi
  • Patent number: 6956440
    Abstract: A PLL can operate linearly at various frequencies by overlapping several VCOs and using a control circuit for controlling the several VCOs to select a VCO at a desired frequency. Accordingly, the PLL can automatically pre-compensate the frequency by using a control signal used in the PLL. As a result, a separate frequency compensation signal is not required. The PLL can be configure on a single chip when the VCO is contained within the PLL.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: October 18, 2005
    Assignee: Hynix Semiconductor Inc.
    Inventor: Yun Young Choi
  • Publication number: 20040085139
    Abstract: A disclosed PLL can operate linearly at various frequencies by overlapping several VCOs and using a control circuit for controlling the several VCOs to select a VCO at a desired frequency. Accordingly, since the disclosed PLL can automatically pre-compensate the frequency by using control signal used in the PLL, a separate frequency correcting signal is not required. When containing a VCO, the disclosed PLL can be configured into a single chip.
    Type: Application
    Filed: June 25, 2003
    Publication date: May 6, 2004
    Inventor: Yun Young Choi