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).

  • Patent number: 11976396
    Abstract: The present disclosure relates to a method for producing a nonwoven fabric that improves filtration performance when applied as a filter material. By adjusting the modification ratio of the Y-shaped cross-section of polyester filaments constituting the nonwoven fabric, when applied to a filter by increasing a specific surface area of the nonwoven fabric, it increases the collection amount of the materials to be filtered and maintains a low differential pressure, thus enabling long-term use.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: May 7, 2024
    Assignee: KOLON INDUSTRIES, INC.
    Inventors: Woo-seok Choi, Min-ho Lee, Hee-jung Cho, Young-shin Park, Jung-soon Jang
  • Patent number: 11970674
    Abstract: The present disclosure relates to a method for preparing a non-woven fabric which improves impregnation and release properties of a fabric softener in the non-woven fabric in order to apply the non-woven fabric to a dryer sheet (sheet-type fabric softener). When increasing porosity and specific surface area in a non-woven fabric made of two-component blended polyester long fibers, impregnation and release rate of a fabric softener are improved even when the non-woven fabric is lightened, making it possible to apply the non-woven fabric to a dryer sheet.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: April 30, 2024
    Assignee: KOLON INDUSTRIES, INC.
    Inventors: Young-shin Park, Min-ho Lee, Jung-soon Jang, Hee-jung Cho, Woo-seok Choi
  • Publication number: 20240124032
    Abstract: An automated driving system of a vehicle includes a driver monitoring unit configured to perform at least one of monitoring a gaze of a driver and determining a position of a hand of the driver, an automated-driving-level switching unit configured to determine whether a transition of a driving control over the vehicle is required based on whether driving environment of the vehicle has changed during the vehicle being driven under control of the automated driving system, and determine an automated driving level to be switched based on a driver monitoring result obtained by the drive monitoring unit, and an automated driving control unit configured to control the vehicle according to the automated driving level.
    Type: Application
    Filed: June 29, 2023
    Publication date: April 18, 2024
    Applicants: Hyundai Motor Company, Kia Corporation
    Inventors: Eun Young CHOI, Woo Jin KIM, Ki Seok SEONG, Dong Il YANG, Da Ye PYUN
  • Publication number: 20240086342
    Abstract: A semiconductor system including a transmitter configured to output a plurality of data as a plurality of data input/output signals through a plurality of channels based on a matrix E, and a receiver configured to generate the plurality of data by differentially amplifying the plurality of data input/output signals received through the plurality of channels based on a matrix D, in which all components of the matrix E and the matrix D are integers, a product matrix of the matrix D and the matrix E is a diagonal matrix, a sum of the components of each row of the matrix D is 0, and a sum of absolute values of the components of each column of the matrix D is less than or equal to a threshold value.
    Type: Application
    Filed: June 27, 2023
    Publication date: March 14, 2024
    Applicants: Samsung Electronics Co., Ltd., UIF (University Industry Foundation), Yonsei University
    Inventors: HYUN JUN PARK, WOO-SEOK CHOI
  • Publication number: 20230279594
    Abstract: The present invention relates to a spunbond nonwoven fabric with improved opening quality and no hazardous residue, a manufacturing method thereof, and a manufacturing apparatus thereof. The method for manufacturing a spunbond nonwoven fabric according to the present invention includes a step of allowing the continuous filament bundle to collide with a metal member containing bismuth (Bi) or a bismuth alloy to obtain filaments opened by frictional charging.
    Type: Application
    Filed: August 6, 2021
    Publication date: September 7, 2023
    Inventors: Young-shin PARK, Min-ho LEE, Hee-jung CHO, Woo-seok CHOI, Dongheon KANG, Jung-soon JANG
  • 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: 20230186068
    Abstract: A weight confirmation method for analog synaptic devices of an artificial neural network includes: learning artificial neural network hardware based on artificial analog memory devices using an artificial neural network learning algorithm; after the learning of the artificial neural network hardware, reading a total weight of a pair of synaptic devices; comparing the total weight of the pair of synaptic devices with 0; applying weights to a positive synaptic device and a negative synaptic device of the pair of synaptic devices, respectively; and confirming the total weight of the pair of synaptic devices in accordance with the weight of the positive synaptic device and the weight of the negative synaptic device. A retention problem of analog synaptic devices is overcome and thus the artificial neural network may stably operate.
    Type: Application
    Filed: April 12, 2022
    Publication date: June 15, 2023
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Ji-Sung Lee, Su-Jung Noh, Han-Saem Lee, Joon-Hyun Kwon, Hyun-Sang Hwang, 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: 20230172080
    Abstract: A three-terminal synaptic device includes a substrate; a source electrode and a drain electrode which are provided on the substrate and spaced apart from each other. The three-terminal synaptic device further includes: a channel layer provided on the substrate, the source electrode, and the drain electrode; an ion reservoir layer which stores active ions; a gate electrode provided on the ion reservoir layer; and an ion barrier layer disposed between the ion reservoir layer. In particular, the channel layer controls movement of active ions between the ion reservoir layer and the channel layer. The three-terminal synaptic device inhibits rapid movement of ions.
    Type: Application
    Filed: May 27, 2022
    Publication date: June 1, 2023
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, POSTECH Research and Business Development Foundation
    Inventors: Su-Jung Noh, Ji-Sung Lee, Han-Saem Lee, Joon-Hyun Kwon, Kyu-Min Lee, Hyun-Sang Hwang, 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: 20230139097
    Abstract: The present disclosure relates to a spunbond nonwoven fabric for a base fabric for tile carpet which not only has excellent spinnability during the production of nonwoven fabric and improves tensile strength and tensile elongation, and has the effect of recycling waste such as polyester plastic, by using recycled polyester with optimized intrinsic viscosity, crystallization temperature, and number of foreign matters as a raw material, and a tile carpet using the same.
    Type: Application
    Filed: February 19, 2021
    Publication date: May 4, 2023
    Inventors: Woo-seok CHOI, Min-ho LEE, Hee-jung CHO, Young-shin PARK, Jung-soon JANG
  • Publication number: 20230048278
    Abstract: A neuromorphic hardware apparatus based on a resistive memory array includes a resistive memory array in which a plurality of synaptic resistor elements are arranged. Each synaptic resistor element is changed in its resistance value depending on a voltage pulse applied thereto and stores the resistance value for a predetermined time. The apparatus also includes a neuron circuit configured to receive an output signal from the resistive memory array and to output a voltage signal to another resistive memory array. The neuron circuit includes a temperature compensation unit, which compensates for an output voltage of the resistive memory array on the basis of an operating temperature of the resistive memory array. Even when a resistive memory array outputs an abnormal output depending on an operating temperature, by compensating a neuron circuit for an input value, it is possible to prevent an operation error from occurring.
    Type: Application
    Filed: January 7, 2022
    Publication date: February 16, 2023
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION, POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION
    Inventors: Su-Jung Noh, Ji-Sung Lee, Han-Saem Lee, Joon-Hyun Kwon, Hyun-Sang Hwang, Woo-Seok Choi
  • 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
  • Publication number: 20220228307
    Abstract: The present disclosure relates to a spunbond nonwoven fabric for a tile carpet base fabric which can manufacture tile carpets with excellent sound absorption performance and tuft withdraw force, including high-thickness nonwoven fabrics made of hollow fibers to which recycled polyester raw materials are applied, and a tile carpet using the same.
    Type: Application
    Filed: April 8, 2022
    Publication date: July 21, 2022
    Inventors: Woo-seok CHOI, Min Ho LEE, Hee-jung CHO, Young-shin PARK, Jung-soon JANG
  • 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
  • Patent number: 11332863
    Abstract: The present invention relates to non-woven fabric with enhanced hardness and sound absorption, more specifically to non-woven fabric that includes two or more kinds of polyester-based materials and non-circular cross-section fiber, and thus has enhanced hardness and sound absorption as well as improved formability, and that can be applied for an automotive undercover.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: May 17, 2022
    Inventors: Hee-jung Cho, Min-ho Lee, Young-shin Park, Gyu-in Jung, 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: 20220033920
    Abstract: The present invention relates to a wire rod of which softening heat treatment can be omitted, and a manufacturing method therefor. One embodiment of the present invention provides a wire rod of which softening heat treatment can be omitted, and a manufacturing method therefor, the wire rod comprising, by wt %, 0.2-0.45% of C, 0.02-0.4% of Si, 0.3-1.5% of Mn, 0.3-1.5% of Cr, 0.02-0.05% of Al, 0.01-0.5% of Mo, 0.01% or less of N, and the balance of Fe and other inevitable impurities, and having a microstructure consisting of, by area %, 40% or more of proeutectoid ferrite based on an equilibrium phase, 40% or more of regenerated pearlite and bainite, and 20% or less of martensite, and wherein the colony average size of the pearlite in the region amounting to ? to ? of the diameter is 5 ?m or less.
    Type: Application
    Filed: December 13, 2019
    Publication date: February 3, 2022
    Inventors: Jae-Seung LEE, Byoung-Gab LEE, Sang-Yoon LEE, Se-Hong MIN, Woo-Seok CHOI
  • Publication number: 20210403840
    Abstract: The present disclosure relates to a method for preparing a non-woven fabric which improves impregnation and release properties of a fabric softener in the non-woven fabric in order to apply the non-woven fabric to a dryer sheet (sheet-type fabric softener). When increasing porosity and specific surface area in a non-woven fabric made of two-component blended polyester long fibers, impregnation and release rate of a fabric softener are improved even when the non-woven fabric is lightened, making it possible to apply the non-woven fabric to a dryer sheet.
    Type: Application
    Filed: December 19, 2019
    Publication date: December 30, 2021
    Inventors: Young-shin PARK, Min-ho LEE, Jung-soon JANG, Hee-jung CHO, Woo-seok CHOI