Patents by Inventor Seok-Hwan Choi

Seok-Hwan 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: 20210364573
    Abstract: Disclosed is a method and apparatus for real-time estimation of full parameters of a permanent magnet synchronous motor. According to this method and apparatus, it is possible to estimate in real time all four parameters of a permanent magnet synchronous motor without additional signal injection. In addition to the state equation, the “stator current ripple model” is additionally used to fundamentally solve the rank deficiency problem in the state equation without injecting additional signals. All four parameters of a permanent magnet synchronous motor can be estimated in real time.
    Type: Application
    Filed: May 19, 2021
    Publication date: November 25, 2021
    Inventors: Kyung Soo KIM, Kyung Hwan Choi, Seok Kyoon Kim
  • Publication number: 20210358885
    Abstract: Provides is a laser bonding method. The method includes forming a bonding part on a substrate; aligning a bonding target on the bonding part and bonding the bonding part and the bonding target. The bonding includes heating the bonding part using a laser. The bonding part formed on the substrate includes an adhesive layer and a conductive particle located in the adhesive layer.
    Type: Application
    Filed: July 28, 2021
    Publication date: November 18, 2021
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Kwang-Seong CHOI, Yong Sung EOM, KeonSoo JANG, Seok-Hwan MOON, Hyun-cheol BAE
  • Publication number: 20210295938
    Abstract: A memory device includes a plurality of data input pads and at least one test data input pad. The memory device also includes a plurality of data input circuits corresponding to a plurality of channels, respectively, the plurality of data input circuits suitable for transmitting respective data received through the data input pads to the corresponding channels. The memory device further includes a test control circuit suitable for selecting at least one data input circuit among the plurality of data input circuits based on test mode information and suitable for controlling the selected data input circuit to transmit set data to the corresponding channel, during a test operation.
    Type: Application
    Filed: October 22, 2020
    Publication date: September 23, 2021
    Applicant: SK hynix Inc.
    Inventors: Young Jun PARK, Young Jun KU, Myeong Jae PARK, Ji Hwan PARK, Seok Woo CHOI
  • Patent number: 11107790
    Abstract: A laser bonding method includes forming a bonding part including an adhesive layer and a conductive particle disposed within the adhesive layer on a substrate; aligning a bonding target by disposing the bonding target on a surface of the bonding part opposite the substrate; disposing a pressing part on a surface of the bonding target that is opposite to the bonding part and pressing the bonding target onto the bonding part through the pressing part; heating the bonding target by irradiating at least the pressing part with a laser and conducting heat from the pressing part to the bonding target and from the bonding target to the bonding part; and bonding together the bonding part and the bonding target by the heat conducted from the bonding target to the bonding part so that the conductive particle electrically connects the substrate and the bonding target. The pressing part may be removed.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: August 31, 2021
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kwang-Seong Choi, Yong Sung Eom, KeonSoo Jang, Seok-Hwan Moon, Hyun-cheol Bae
  • Publication number: 20210075883
    Abstract: A server may include a communication interface for receiving a plurality of profile information from a plurality of terminals; and a processor configured to divide users of the plurality of terminals into a plurality of groups based on a first criterion, to divide users of a first gender included in each group into a plurality of subgroups based on a second criterion different from the first criterion, to divide users of a second gender different from the first gender, included in each group into a plurality of matching groups to correspond to each of the plurality of subgroups, and to provide profile information of users included in each of the plurality of matching groups corresponding to each of the plurality of subgroups among the plurality of profile information to users included in each of the plurality of subgroups.
    Type: Application
    Filed: September 9, 2020
    Publication date: March 11, 2021
    Inventors: Sang Il Ahn, Hyeong Keol Nam, Seok Jun Seo, Seok Hwan Choi, Jae Hyeuk Oh
  • Publication number: 20210019443
    Abstract: Disclosed herein is an image processing method and an image processing system for deep learning. The image processing method includes converting image data including at least one figure image into a vector image by changing a data format, encrypting at least one first attribute value for a position of the figure image in the vector image according to a selected encryption scheme, constructing a de-identified image for the image data by using a second attribute value which is changed by the encryption, and transferring the de-identified image to a cloud server in which a deep learning model is managed and processing deep learning operations of the de-identified image by the cloud server.
    Type: Application
    Filed: December 5, 2019
    Publication date: January 21, 2021
    Inventors: Yoon Ho CHOI, Dong-Hyun Ko, Seok-Hwan Choi, Jinmyeong Shin, Seon-Jin Hwang
  • Publication number: 20200048729
    Abstract: The present invention relates to a soft high-silicon steel sheet, and more particularly, to a soft high-silicon steel sheet which has ductility even if the silicon content thereof is greater than 4%, and can thus be manufactured into a steel sheet having a high silicon content only by means of rolling without an additional siliconizing process. The soft high-silicon steel sheet may include a silicon content greater than 4 wt % and less than or equal to 7 wt % and 1 to 20% of chromium, or may include 5 to 7 wt % of Si+Al and 1 to 20 wt % of chromium.
    Type: Application
    Filed: September 10, 2019
    Publication date: February 13, 2020
    Inventors: Dong-Kyun KIM, Byung-Deug HONG, Seok-Hwan CHOI
  • Publication number: 20160319387
    Abstract: The present invention relates to a soft high-silicon steel sheet, and more particularly, to a soft high-silicon steel sheet which has ductility even if the silicon content thereof is greater than 4%, and can thus be manufactured into a steel sheet having a high silicon content only by means of rolling without an additional siliconizing process. The soft high-silicon steel sheet may include a silicon content greater than 4 wt % and less than or equal to 7 wt % and 1 to 20% of chromium, or may include 5 to 7 wt % of Si+Al and 1 to 20 wt % of chromium.
    Type: Application
    Filed: December 24, 2013
    Publication date: November 3, 2016
    Inventors: Dong-Kyun KIM, Byung-Deug HONG, Seok-Hwan CHOI
  • Patent number: 9293177
    Abstract: Provided are a semiconductor memory device, a memory system including the same, and an operating method thereof. The semiconductor memory device includes a memory cell array including a plurality of memory cells, a peripheral circuit suitable for reading least significant bit data and most significant bit data of neighboring memory cells adjacent to selected memory cells out of the plurality of memory cells, and generating pattern flag data using the least significant bit data and the most significant bit data and a control logic suitable for controlling the peripheral circuit to set a read voltage to be applied to the selected memory cells based on the pattern flag data.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: March 22, 2016
    Assignee: SK Hynix Inc.
    Inventors: Seok Hwan Choi, Hyun Ju Lee
  • Patent number: 9256494
    Abstract: A memory system and an operating method thereof are provided. The memory system includes a semiconductor memory device configured to perform a read operation and a controller configured to control the read operation of the semiconductor memory device, and the controller, by determining programmed states of memory cells located nearby selected memory cells, divides the selected memory cells into a plurality of groups depending on an amount of interference, and corrects data of one of the groups having a great amount of interference.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: February 9, 2016
    Assignee: SK Hynix Inc.
    Inventors: Hyun Ju Lee, Seok Hwan Choi
  • Publication number: 20150117125
    Abstract: Provided are a semiconductor memory device, a memory system including the same, and an operating method thereof. The semiconductor memory device includes a memory cell array including a plurality of memory cells, a peripheral circuit suitable for reading least significant bit data and most significant bit data of neighboring memory cells adjacent to selected memory cells out of the plurality of memory cells, and generating pattern flag data using the least significant bit data and the most significant bit data and a control logic suitable for controlling the peripheral circuit to set a read voltage to be applied to the selected memory cells based on the pattern flag data.
    Type: Application
    Filed: February 19, 2014
    Publication date: April 30, 2015
    Applicant: SK HYNIX INC.
    Inventors: Seok Hwan CHOI, Hyun Ju LEE
  • Publication number: 20150100849
    Abstract: A memory system and an operating method thereof are provided. The memory system includes a semiconductor memory device configured to perform a read operation and a controller configured to control the read operation of the semiconductor memory device, and the controller, by determining programmed states of memory cells located nearby selected memory cells, divides the selected memory cells into a plurality of groups depending on an amount of interference, and corrects data of one of the groups having a great amount of interference.
    Type: Application
    Filed: February 11, 2014
    Publication date: April 9, 2015
    Applicant: SK hynix Inc.
    Inventors: Hyun Ju LEE, Seok Hwan CHOI
  • Patent number: 8953375
    Abstract: A semiconductor memory device includes an information generation unit configured to convert positions of threshold voltages of memory cells in threshold voltage distributions based on determination voltages included in an overlapping portion between the threshold voltage distributions to generate a plurality of position information codes, and an error correction unit configured to sequentially receive the plurality of position information codes and perform an error correction operation for data of the memory cells.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: February 10, 2015
    Assignee: SK Hynix Inc.
    Inventors: Jun-Rye Rho, Seok-Hwan Choi
  • Publication number: 20140360882
    Abstract: The present invention relates to an apparatus and a method for manufacturing metal foil by electroforming.
    Type: Application
    Filed: November 15, 2012
    Publication date: December 11, 2014
    Inventors: Hong-Joon Kim, Jin-You Kim, Jae-Kon Lee, Jae-Hun Choi, Sung-Jool Kim, Seok-Hwan Choi, Un-Kwan Cho
  • Patent number: 8817561
    Abstract: A method for estimating channel characteristics of a nonvolatile memory device including a plurality of memory cells includes the steps of: calculating first threshold voltage distributions of the memory cells programmed according to input data, based on the input data and a physical structure of the memory cells; calculating second threshold voltage distributions of the memory cells, based on output data and the physical structure of the memory cells; and analyzing the relation between the first and second threshold voltage distributions, using a mask.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: August 26, 2014
    Assignees: SK Hynix Inc., Korea Advanced Institute of Science and Technology
    Inventors: Seok Hwan Choi, Joong Seob Yang, Seung Ho Chang, Sang Sik Kim, Sang Chul Lee, Ho Yeon Lee, Jaekyun Moon, Jaehyeong No
  • Publication number: 20140010031
    Abstract: A method for estimating channel characteristics of a nonvolatile memory device including a plurality of memory cells includes the steps of: calculating first threshold voltage distributions of the memory cells programmed according to input data, based on the input data and a physical structure of the memory cells; calculating second threshold voltage distributions of the memory cells, based on output data and the physical structure of the memory cells; and analyzing the relation between the first and second threshold voltage distributions, using a mask.
    Type: Application
    Filed: February 14, 2013
    Publication date: January 9, 2014
    Applicants: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, SK HYNIX INC.
    Inventors: Seok Hwan CHOI, Joong Seob YANG, Seung Ho CHANG, Sang Sik KIM, Sang Chul LEE, Ho Yeon LEE, Jaekyun MOON, Jaehyeong NO
  • Publication number: 20130170295
    Abstract: A semiconductor memory device includes an information generation unit configured to convert positions of threshold voltages of memory cells in threshold voltage distributions based on determination voltages included in an overlapping portion between the threshold voltage distributions to generate a plurality of position information codes, and an error correction unit configured to sequentially receive the plurality of position information codes and perform an error correction operation for data of the memory cells.
    Type: Application
    Filed: August 22, 2012
    Publication date: July 4, 2013
    Inventors: Jun-Rye RHO, Seok-Hwan CHOI
  • Publication number: 20130020948
    Abstract: The present disclosure provides a method of controlling a human-friendly illumination. The method includes determining a displayed object, using a control module, based on at least one data sensed by a sensor module; receiving, by the control module, from a scene database scene data corresponding to the displayed object; creating, by the control module, illumination control information based on the scene data and sending the illumination control information to a lamp control unit; and outputting, by the lamp control unit, an illumination control signal corresponding to the illumination control information to a lamp module.
    Type: Application
    Filed: March 22, 2011
    Publication date: January 24, 2013
    Applicant: ECOSUNNY CO., LTD.
    Inventors: Mi Sook Han, Hyun Chul Hwang, Seok Hwan Choi, In Ho Kim, Mun Sik Kang, Joon Seok Lee, Hyon Soo Shin, Sung Woo Woo, Jae Baek Heo
  • Patent number: 8142742
    Abstract: Disclosed is a shell-and-tube heat exchanger type reactor that can be used for a process of producing unsaturated acids from olefins via fixed-bed catalytic partial oxidation, which comprises at least one reaction tube, each including at least one first-step catalyst layer, in which olefins are oxidized by a first-step catalyst to mainly produce unsaturated aldehydes, and at least two second-step catalyst layers, in which the unsaturated aldehydes are oxidized by a second-step catalyst to produce unsaturated acids, wherein a first catalyst layer of the second-step catalyst layers, disposed right adjacent to the first-step catalyst layer, has an activity corresponding to 5˜30% of the activity of the catalyst layer having a highest activity among the second-step catalyst layers. A method of producing unsaturated acids from olefins by using the reactor is also disclosed.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: March 27, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Boo Gon Woo, Jun Seok Ko, Kyoung Su Ha, Seong Pil Kang, Seok Hwan Choi, Young Bae Kim
  • Publication number: 20110008218
    Abstract: Disclosed is a shell-and-tube heat exchanger type reactor that can be used for a process of producing unsaturated acids from olefins via fixed-bed catalytic partial oxidation, which comprises at least one reaction tube, each including at least one first-step catalyst layer, in which olefins are oxidized by a first-step catalyst to mainly produce unsaturated aldehydes, and at least two second-step catalyst layers, in which the unsaturated aldehydes are oxidized by a second-step catalyst to produce unsaturated acids, wherein a first catalyst layer of the second-step catalyst layers, disposed right adjacent to the first-step catalyst layer, has an activity corresponding to 5˜30% of the activity of the catalyst layer having a highest activity among the second-step catalyst layers. A method of producing unsaturated acids from olefins by using the reactor is also disclosed.
    Type: Application
    Filed: September 17, 2010
    Publication date: January 13, 2011
    Applicant: LG CHEM, LTD.
    Inventors: Boo Gon WOO, Jun Seok KO, Kyoung Su HA, Seong Pil KANG, Seok Hwan CHOI, Young Bae KIM