Patents by Inventor Woo Seok Choi

Woo Seok 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: 20260260106
    Abstract: A learning apparatus and method for implementing an edge device using a resistive element and an analysis apparatus and method using the same are disclosed. The learning apparatus for implementing an edge device using a resistive element according to an embodiment of the present application may include a first learning unit determining a weight of an artificial neural network through learning based on first training data and reflecting the determined weight in a first resistive element, and a second learning unit updating the weight of the artificial neural network through learning based on second training data collected through the device and reflecting the updated weight in the second resistive element.
    Type: Application
    Filed: November 16, 2022
    Publication date: September 3, 2026
    Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Hyun Sang HWANG, Woo Seok CHOI
  • Publication number: 20260253564
    Abstract: The embodiment may relate to a power supply device that supplies a plurality of voltages. The embodiment may provide a technology for supplying a negative voltage generated in one power conversion circuit to an inductor of another power conversion circuit to improve the duty of another power conversion circuit and increase the power conversion efficiency of the power supply device as a whole.
    Type: Application
    Filed: March 5, 2024
    Publication date: August 27, 2026
    Applicant: LX SEMICON CO., LTD.
    Inventors: Won Suk JANG, Young Kook AHN, Jong Hyun YOON, Woo Seok CHOI
  • Publication number: 20260121028
    Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery comprising the same, and more particularly, to a positive electrode active material which exhibit improved driving characteristics under high-voltage operating conditions through surface modification of a lithium transition metal oxide of a Mid-Ni type having a relatively low nickel content, and to a lithium secondary battery comprising the same.
    Type: Application
    Filed: October 28, 2025
    Publication date: April 30, 2026
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Yu Jin SON, Jun Hee HEO, Sang Don LEE, Jung Bae PARK, Yo Seop SHIN, Do Young HWANG, Seok Jo KIM, Woo Seok CHOI, Jung Gyu PARK
  • Publication number: 20260121036
    Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery comprising the same, and more particularly, to a positive electrode active material comprising a mid-Ni type lithium transition metal oxide having a relatively low nickel content, wherein the c-axis length of unit particles constituting the lithium transition metal oxide is increased to enhance the efficiency of reversible intercalation/deintercalation of lithium ions, thereby improving electrochemical characteristics, which are relatively insufficient compared to those of a high-Ni type lithium transition metal oxide having a relatively high nickel content, and to a lithium secondary battery comprising the same.
    Type: Application
    Filed: September 17, 2025
    Publication date: April 30, 2026
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Yu Jin SON, Jung Bae PARK, Woo Seok CHOI, Jung Gyu PARK, Yo Seop SHIN, Jun Hee HEO, Seok Jo KIM, Do Young HWANG, Sang Don LEE
  • Publication number: 20260081608
    Abstract: An oscillator configured in a multiplying delay locked loop according to an embodiment includes: a signal input unit configured to apply a reference clock at predetermined intervals; an inverter unit connected to the signal input unit and configured to oscillate and generate an output clock based on a level of a drain voltage dropped from a power supply voltage according to a current supplied by the reference clock; and a current supply unit configured to supply a predetermined current through a node of the drain voltage before the predetermined interval returns after the inverter unit operates, wherein the inverter unit includes a CMOS inverter connected between the drain voltage and ground.
    Type: Application
    Filed: August 13, 2025
    Publication date: March 19, 2026
    Inventors: Woo Seok CHOI, Ha Jung PARK
  • Publication number: 20260056631
    Abstract: A signal processing apparatus for a touch input device is described. The apparatus includes: a plurality of drive channels arranged in an input area for a touch function; a plurality of sensor channels arranged to intersect the drive channels and configured to detect a change in capacitance of the input area according to a driving signal applied to the drive channels; and a readout IC configured to apply the driving signal to the drive channels and receive detection results from the sensor channels. The readout IC includes: an event detector configured to detect an event region and to enable a second driving signal; and a signal converter configured to measure a capacitance signal, convert the signal into a digital signal, and output the digital signal.
    Type: Application
    Filed: August 21, 2025
    Publication date: February 26, 2026
    Inventors: Woo Seok CHOI, Hyeri ROH
  • Publication number: 20260058137
    Abstract: The present invention relates to a positive electrode active material and a lithium secondary battery comprising the same. More specifically, the present invention relates to a positive electrode active material comprising a lithium transition metal oxide of a Mid-Ni type having a relatively low nickel content, in which the content of fine powder in the positive electrode active material is controlled and the particle size distribution of the lithium transition metal oxide included in the positive electrode active material is adjusted, thereby improving capacity and lifetime characteristics and providing enhanced operational properties at high voltage.
    Type: Application
    Filed: October 29, 2025
    Publication date: February 26, 2026
    Applicant: ECOPRO BM CO., LTD.
    Inventors: Yu Jin SON, Jung Bae PARK, Woo Seok CHOI, Jung Gyu PARK, Yo Seop SHIN, Seok Jo KIM, Jun Hee HEO, Sang Don LEE, Do Young HWANG
  • Patent number: 12297343
    Abstract: Provided are an acrylic-based copolymer composition, a method of preparing the same, and an acrylic-based rubber composition obtained from the acrylic-based copolymer composition. Specifically, an acrylic-based copolymer composition prepared by polymerizing the acrylic-based copolymers each at high and low temperatures and mixing the acrylic-based copolymers, thereby having improved processability is provided.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: May 13, 2025
    Assignee: LG Chem, Ltd.
    Inventors: Se Eun Lee, Byoung Yun Kim, Hyung Woon Yoon, Woo Seok Choi, In Sung Jo, Jae Min Lee
  • Publication number: 20250126370
    Abstract: An image sensor includes a pixel array including a plurality of normal pixels, a plurality of phase detection groups, and a color filter array. Each phase detection group includes a first phase detection pixel and a second phase detection pixel disposed adjacent to the first phase detection pixel. The color filter array includes a plurality of unit groups. Each unit group includes a plurality of color filters of a same color arranged in an M×N matrix on the pixel array, wherein M and N are natural numbers. A first color filter among the color filters of a first color is disposed on the first phase detection pixel of one of the unit groups and a second color filter among the color filters of a second color different from the first color is disposed on the second phase detection pixel of another one of the unit groups.
    Type: Application
    Filed: December 26, 2024
    Publication date: April 17, 2025
    Inventors: DONG-JIN PARK, WOO SEOK CHOI, JEE HONG LEE
  • Patent number: 12240931
    Abstract: Provided are a preparation method of a nitrile-based rubber, a nitrile-based rubber prepared therefrom, and a rubber composition including the nitrile-based rubber, and the nitrile-based rubber has a low content of a residual emulsifier and excellent mechanical physical properties by using a emulsifier mixture including a first emulsifier including a sulfosuccinate ester-based compound, and a second emulsifier including a fatty acid or a metal salt thereof, or a rosin acid or a metal salt thereof, each of which has 12 to 18 carbon atoms and a monocarboxyl group, wherein the first emulsifier and the second emulsifier are included at a weight ratio of 2:1 to 6:1.
    Type: Grant
    Filed: October 8, 2020
    Date of Patent: March 4, 2025
    Assignee: LG Chem, Ltd.
    Inventors: Jae Min Lee, Byoung Yun Kim, Sung Min Son, Se Eun Lee, Woo Seok Choi
  • Patent number: 12219271
    Abstract: An image sensor includes a pixel array including a plurality of normal pixels, a plurality of phase detection groups, and a color filter array. Each phase detection group includes a first phase detection pixel and a second phase detection pixel disposed adjacent to the first phase detection pixel. The color filter array includes a plurality of unit groups. Each unit group includes a plurality of color filters of a same color arranged in an M×N matrix on the pixel array, wherein M and N are natural numbers. A first color filter among the color filters of a first color is disposed on the first phase detection pixel of one of the unit groups and a second color filter among the color filters of a second color different from the first color is disposed on the second phase detection pixel of another one of the unit groups.
    Type: Grant
    Filed: October 27, 2022
    Date of Patent: February 4, 2025
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-Jin Park, Woo Seok Choi, Jee Hong Lee
  • Patent number: 12116483
    Abstract: A conjugated diene-based copolymer composition, a method of preparing the same, and a rubber composition including the same are provided. The conjugated diene-based copolymer composition includes a first conjugated diene-based copolymer and a second conjugated diene-based copolymer each including a repeating unit derived from an aromatic vinyl monomer, a repeating unit derived from a conjugated diene-based monomer, and a repeating unit derived from a hydroxyalkyl (meth)acrylate monomer. The first conjugated diene-based copolymer includes 0.01 wt % to 1 wt % of the repeating unit derived from the hydroxyalkyl (meth)acrylate monomer, and the second conjugated diene-based copolymer includes 4.5 wt % to 6.5 wt % of the repeating unit derived from the hydroxyalkyl (meth)acrylate monomer.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: October 15, 2024
    Assignee: LG Chem, Ltd.
    Inventors: In Sung Jo, Byoung Yun Kim, Hyung Woon Yoon, Se Eun Lee, Woo Seok Choi
  • Patent number: 11700460
    Abstract: Provided is an image sensing apparatus including an image sensor including a pixel array configured to output a raw image having a Bayer pattern, and an analog end configured to perform an analog binning process on groups of pixels of same colors included in same columns of each of a plurality of sub-kernels corresponding to a first green pixel, a red pixel, a blue pixel, and a second green pixel, and output median values for different colors, and a digital signal processor configured to perform a digital binning process on the median values for the different colors included in different columns of each of the plurality of sub-kernels, and output a binned image.
    Type: Grant
    Filed: May 30, 2022
    Date of Patent: July 11, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hee Kang, Chan Young Jang, Woo Seok Choi
  • Publication number: 20230178269
    Abstract: Disclosed is a method for producing a high-entropy alloy superconductor bulk materials and wire materials, the method including a first step of mixing 4 to 10 types of metals selected from a group consisting of niobium (Nb), tantalum (Ta), titanium (Ti), hafnium (Hf), zirconium (Zr), tungsten (W), molybdenum (Mo), chromium (Cr), vanadium (V), and rhenium (Re) with each other to prepare a mixture and then milling the mixture to prepare mixed metal powders; and a second step of sintering the mixed metal powders prepared in the first step.
    Type: Application
    Filed: December 2, 2022
    Publication date: June 8, 2023
    Applicants: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY, University-Industry Cooperation Group of Kyung Hee University
    Inventors: Jong-Soo RHYEE, Jin Hee KIM, Tuson PARK, Soon-Gil JUNG, Yoonseok HAN, Won Nam KANG, Woo Seok CHOI
  • Publication number: 20230143333
    Abstract: An image sensor includes a pixel array including a plurality of normal pixels, a plurality of phase detection groups, and a color filter array. Each phase detection group includes a first phase detection pixel and a second phase detection pixel disposed adjacent to the first phase detection pixel. The color filter array includes a plurality of unit groups. Each unit group includes a plurality of color filters of a same color arranged in an M×N matrix on the pixel array, wherein M and N are natural numbers. A first color filter among the color filters of a first color is disposed on the first phase detection pixel of one of the unit groups and a second color filter among the color filters of a second color different from the first color is disposed on the second phase detection pixel of another one of the unit groups.
    Type: Application
    Filed: October 27, 2022
    Publication date: May 11, 2023
    Inventors: Dong-Jin PARK, Woo Seok CHOI, Jee Hong LEE
  • Publication number: 20230020054
    Abstract: Disclosed is a bearing wire rod includes, in percent by weight (wt %), 0.8 to 1.2% of C, 0.01 to 0.6% of Si, 0.1 to 0.6% of Mn, 1.0 to 2.0% of Cr, 0.01 to 0.06% of Al, 0.02% or less (exclusive of 0) of N, and the balance of Fe and inevitable impurities, wherein a prior austenite grain size of a microstructure is from 3 to 10 ?m, and a sum of lengths of high angle grain boundaries having a misorientation angle of 15° or more per unit area is from 1,000 to 4,000 mm/mm2.
    Type: Application
    Filed: February 6, 2020
    Publication date: January 19, 2023
    Applicant: POSCO
    Inventors: Jae Seung LEE, Se Hong MIN, Kyoung-Won KIM, Woo Seok CHOI, Ki-Hwan KIM, In Gyu PARK
  • Patent number: 11350045
    Abstract: Provided is an image sensing apparatus including an image sensor including a pixel array configured to output a raw image having a Bayer pattern, and an analog end configured to perform an analog binning process on groups of pixels of same colors included in same columns of each of a plurality of sub-kernels corresponding to a first green pixel, a red pixel, a blue pixel, and a second green pixel, and output median values for different colors, and a digital signal processor configured to perform a digital binning process on the median values for the different colors included in different columns of each of the plurality of sub-kernels, and output a binned image.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: May 31, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hee Kang, Chan Young Jang, Woo Seok Choi
  • Publication number: 20220089801
    Abstract: Provided are a preparation method of a nitrile-based rubber having a low content of a residual emulsifier and excellent mechanical physical properties by using a emulsifier mixture including a first emulsifier including a sulfosuccinate ester-based compound and a second emulsifier including a fatty acid having 12 to 18 carbon atoms and a monocarboxyl group, or a rosin acid, wherein the first emulsifier and the second emulsifier are included at a weight ratio of 2:1 to 6:1, a nitrile-based rubber prepared therefrom, and a rubber composition including the nitrile-based rubber.
    Type: Application
    Filed: October 8, 2020
    Publication date: March 24, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Jae Min Lee, Byoung Yun Kim, Sung Min Son, Se Eun Lee, Woo Seok Choi
  • Publication number: 20220073708
    Abstract: A conjugated diene-based copolymer composition, a method of preparing the same, and a rubber composition including the same are provided. The conjugated diene-based copolymer composition includes a first conjugated diene-based copolymer and a second conjugated diene-based copolymer each including a repeating unit derived from an aromatic vinyl monomer, a repeating unit derived from a conjugated diene-based monomer, and a repeating unit derived from a hydroxyalkyl (meth)acrylate monomer. The first conjugated diene-based copolymer includes 0.01 wt % to 1 wt % of the repeating unit derived from the hydroxyalkyl (meth)acrylate monomer, and the second conjugated diene-based copolymer includes 4.5 wt % to 6.5 wt % of the repeating unit derived from the hydroxyalkyl (meth)acrylate monomer.
    Type: Application
    Filed: September 2, 2020
    Publication date: March 10, 2022
    Applicant: LG Chem, Ltd.
    Inventors: In Sung Jo, Byoung Yun Kim, Hyung Woon Yoon, Se Eun Lee, Woo Seok Choi
  • Publication number: 20210377504
    Abstract: An image signal processor is provided. The image signal processor includes a white balancing block which performs white balancing on a raw RGB image of a Bayer pattern received from an image sensor on a kernel basis or in a kernel unit, a green generation block which performs cross-binning on white-balanced G pixel to generate a first green pixel, and adds a high-frequency component to which a preset weight is applied to generate a binned green pixel, a red-blue generation block which generates a U pixel and a V pixel indicating directionality, on the basis of the binned green pixel, a white-balanced R pixel, and a white-balanced B pixel, and merges the binned green pixel to each of the U pixel and the V pixel to generate a binned red pixel and a binned blue pixel and an inverse white balancing block which performs an inverse white balancing on the binned red pixel, the binned green pixel, and the binned blue pixel to output a final binning image.
    Type: Application
    Filed: February 11, 2021
    Publication date: December 2, 2021
    Inventors: Chan Young Jang, Hee Kang, Woo Seok Choi