Patents by Inventor Cheol Choi

Cheol 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: 20240069524
    Abstract: Disclosed is an apparatus for excitation signal generation for a resolver. The apparatus includes a sine wave generator that generates a sine wave based on a square wave, an amplifier that amplifies the sine wave, a differential signal generator that converts, into a differential signal, the amplified sine wave, a driver that inputs the differential signal to a coil, and a processor that generates an excitation signal by increasing a voltage of the sine wave from a start voltage to a target voltage through at least one of the sine wave generator and the amplifier based on a transient current that flows into the coil in a transient response interval.
    Type: Application
    Filed: December 27, 2022
    Publication date: February 29, 2024
    Applicant: HYUNDAI MOBIS CO., LTD.
    Inventors: Yun Ho CHOI, Hyung Min PARK, Joo Won PARK, Yeon Ho KIM, Won Hee JO, Tae Hwan KANG, Beom Cheol CHO
  • Patent number: 11917755
    Abstract: The carrier-foil-attached ultra-thin copper foil according to one embodiment of the present invention comprises a carrier foil, a release layer, a first ultra-thin copper foil, a Cu—Al bonding strength improvement layer, an Al layer, and a second ultra-thin copper foil, wherein the release layer may comprise a first metal (A3) having peeling properties, and a second metal (B3) and third metal (C3) facilitating the plating of the first metal (A3).
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: February 27, 2024
    Assignee: Lotte Energy Materials Corporation
    Inventors: Won Jin Beom, Sun Hyung Lee, Eun Sil Choi, Ki Deok Song, Hyung Cheol Kim
  • Patent number: 11915853
    Abstract: A coil component is provided. The coil component includes a body having fifth and sixth surfaces opposing each other, first and second surfaces respectively connecting the fifth and sixth surfaces of the body and opposing each other, and third and fourth surfaces respectively connecting the first and second surfaces of the body and opposing each other in one direction, a recess disposed in an edge between one of the first and second surfaces of the body and the sixth surface of the body, a coil portion disposed inside the body and exposed through the recess, and an external electrode including a connection portion disposed in the recess and connected to the coil portion, and a pad portion disposed on one surface of the body. A length of the pad portion in the one direction is greater than a length of the connection portion in the one direction.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: February 27, 2024
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Seung Mo Lim, Seung Min Lee, Byeong Cheol Moon, Yong Hui Li, Byung Soo Kang, Ju Hwan Yang, Tai Yon Cho, No Il Park, Tae Jun Choi
  • Patent number: 11906900
    Abstract: Proposed is a photoresist composition for a KrF light source, which exhibits a vertical profile compared to conventional KrF positive photoresists by adding a resin capable of increasing transmittance in order to form a semiconductor pattern, particularly a chemically amplified positive photoresist composition for improving a pattern profile, which includes, based on the total weight of the composition, 5 to 60 wt % of a polymer resin, 0.1 to 10 wt % of a transmittance-increasing resin additive represented by Chemical Formula 1, 0.05 to 10 wt % of a photoacid generator, 0.01 to 5 wt % of an acid diffusion inhibitor, and the remainder of a solvent, thus making it possible to provide a composition exhibiting a vertical profile, enhanced sensitivity and a superior processing margin compared to conventional positive photoresists.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: February 20, 2024
    Assignee: YOUNG CHANG CHEMICAL CO., LTD
    Inventors: Su Jin Lee, Young Cheol Choi, Seung Hun Lee, Seung Hyun Lee
  • Publication number: 20240049533
    Abstract: Disclosed is a fiber-type organic light-emitting display panel including multiple element fibers extending in a first direction; and multiple wire fibers extending in a second direction, the multiple wire fibers being woven with the multiple element fibers, wherein each element fiber includes a core fiber, a light-emitting element and a driving element mounted on the core fiber, a first contact pad disposed in an area adjacent to the light-emitting element so as to electrically connect a first electrode layer of the light-emitting element and a first wire fiber, a second contact pad disposed in an area adjacent to the driving element so as to electrically connect a first electrode of the driving element and a second wire fiber, and a third contact pad disposed in an area adjacent to the driving element so as to electrically connect a second electrode of the driving element and a third wire fiber.
    Type: Application
    Filed: March 13, 2023
    Publication date: February 8, 2024
    Inventors: Kyung Cheol Choi, Yong Ha Hwang, Chan Young Kim, Seong Uk Kong
  • Patent number: 11833409
    Abstract: The disclosure herein provides a smart golf pin system and golf GPS device with a mechanism to automatically receive golf hole cup information and display the golf hole information on the golf GPS device. More specifically, the golf GPS device receives data from a plurality of GPS modules installed on the golf pins located throughout the golf course and based on its current location, selects a set of GPS coordinates corresponding to the current hole that the golfer is playing, and displays a distance from the golf GPS device to the actual hole cup location in the current hole, thereby allowing the golfer to fine tune his or her approach accordingly.
    Type: Grant
    Filed: August 5, 2022
    Date of Patent: December 5, 2023
    Assignee: GolfzonDeca, Inc.
    Inventors: Yonghun Kim, Changgon Hyun, Won Pyo Hong, Whan-Cheol Choi, KyuHak Choi, Youha Kim, Sung-Il Baek
  • Publication number: 20230350293
    Abstract: The present invention is for providing an I-line negative photoresist composition exhibiting better process margin than a conventional I-line negative photoresist, has the purpose of alleviating a problem in which the center of a contact hole pattern is dented during pattern formation, and relates to an I-line negative photoresist composition for reducing the height difference, between the center and the edge, formed by the denting of the center and for reducing line edge roughness (LER) during pattern formation in a semiconductor process, the composition comprising: a polymer resin; a compound represented by chemical formula 1; a crosslinking agent; a photoacid generator; an acid diffusion inhibitor; and a solvent.
    Type: Application
    Filed: August 26, 2021
    Publication date: November 2, 2023
    Inventors: Su Jin LEE, Young Cheol CHOI, Seung Hun LEE, Seung Hyun LEE
  • Publication number: 20230343984
    Abstract: An apparatus for manufacturing a secondary battery is provided. The apparatus comprises a separation sheet supply device configured to supply two separation sheets configured to be disposed vertically. An electrode supply device is configured to supply electrodes to be disposed between the two separation sheets and on a top surface of one of the separation sheets. The one of the separation sheets is disposed at an upper side. A lamination device is configured to bond the two separation sheets and the electrodes to each other. An ultrasonic cutting device is configured to bond surfaces of the two separation sheets to each other and simultaneously cut a bonding surface of the two separation sheets.
    Type: Application
    Filed: June 10, 2021
    Publication date: October 26, 2023
    Applicant: LG Energy Solution, Ltd.
    Inventors: Sang Ho Bae, Joo Young Chung, Tae Jong Kim, Sang Woo Lee, Su Taek Jung, Won Pill Hwang, Min Cheol Choi, Jin Gon Kim, Yong Jun Lee
  • Publication number: 20230301165
    Abstract: A display device includes a display panel, a support film, and a polymer layer. The display panel includes a display area comprising a first area that is bendable, and a non-display area adjacent to the display area. The support film is coupled to a bottom surface of the display panel. The support film includes a first groove overlapping with the first area. The polymer layer is disposed in the first groove. The polymer layer includes a material with higher flexibility than the support film. Angles formed by the top surface of the support film and inner sides of the support film defining the first groove are acute angles.
    Type: Application
    Filed: May 24, 2023
    Publication date: September 21, 2023
    Inventors: Chang Han LEE, Myung Hwan KIM, Sang Yeol KIM, Woo Hyun KIM, Hyo Jin KIM, Kyoung ll MIN, Tae Hyun HUNG, Se Joong SHIN, Ho Ryun CHUNG, Jae cheol CHOI
  • Publication number: 20230299348
    Abstract: The present invention relates to a non-aqueous electrolyte solution additive capable of improving lifespan characteristics of a lithium secondary battery by forming a solid-electrolyte interphase that is stable even at a high temperature and has low resistance when applied to a non-aqueous electrolyte solution, and relates to a non-aqueous electrolyte solution additive including a sultone-based compound represented by Formula I, a non-aqueous electrolyte solution including the same, and a lithium secondary battery.
    Type: Application
    Filed: September 15, 2021
    Publication date: September 21, 2023
    Applicant: LG Energy Solution, Ltd.
    Inventors: Jung Keun Kim, Young Min Lim, Won Kyun Lee, Duk Hun Jang, Chan Woo Noh, Chul Eun Yeom, Jeong Ae Yoon, Kyoung Hoon Kim, Chul Haeng Lee, Shul Kee Kim, Young Cheol Choi
  • Publication number: 20230249722
    Abstract: A hoist communication device in a rail car of an automated material handling system in which a master communication unit and a slave communication unit perform power line communication through one power supply line provided on a belt and a rail car controller connected to the master communication unit is individually communicated with a plurality of gripper devices connected to the slave communication unit using different carrier frequencies.
    Type: Application
    Filed: January 10, 2023
    Publication date: August 10, 2023
    Inventors: Hak Seo SEO, Jin Hwan KO, Sung Ik KIM, Sung Hyuk YOUN, Youl Kwon SUNG, Hee Hyun SEO, Seung Hwan LEE, Deok Ha LEE, Se Hun LEE, Hyeong Cheol CHOI
  • Publication number: 20230239561
    Abstract: The present invention relates to a camera module comprising: a first body including a lens; a second body coupled to the first body; and a substrate assembly disposed within the second body, wherein the substrate assembly comprises: a first substrate and a second substrate; a third substrate disposed between the first substrate and the second substrate; a fourth substrate electrically connecting the first substrate and the second substrate; a fifth substrate electrically connecting the second substrate and the third substrate; and a processor disposed on the second substrate, wherein the length of the fourth substrate is longer than the length of the fifth substrate.
    Type: Application
    Filed: June 8, 2021
    Publication date: July 27, 2023
    Applicant: LG INNOTEK CO., LTD.
    Inventors: Jong Cheol CHOI, Ohk Sung KIM, Seong Deok MOON
  • Patent number: 11711028
    Abstract: Disclosed are an inverter control device and method. The method according to an embodiment of the present includes estimating a rotation speed of a motor, determining a slip frequency reference using an energy of a direct current terminal capacitor of an inverter, which provides an output voltage to the motor, and a direct current terminal energy reference when a direct current terminal voltage of the inverter is a certain level or less, and providing a frequency reference determined by adding the rotation speed of the motor and the slip frequency reference to the inverter.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: July 25, 2023
    Assignee: LS ELECTRIC CO., LTD.
    Inventors: Seung Cheol Choi, Hak Jun Lee
  • Publication number: 20230205431
    Abstract: Disclosed herein are a dynamic memory management apparatus and method and a computer-readable storage medium for the same. The dynamic memory management method includes defining a shadow area mapped to a memory area, setting a coloring value in the shadow area, and permitting or denying access to the memory area based on the coloring value when accessing the memory area.
    Type: Application
    Filed: October 20, 2022
    Publication date: June 29, 2023
    Inventors: Hong-Il JU, Dong-Wook KANG, Gae-Il AN, Bo-Heung CHUNG, Byeong-Cheol CHOI
  • Publication number: 20230207855
    Abstract: A method for manufacturing a secondary battery includes: an accommodating process of accommodating an electrode assembly in a battery case so that an electrode lead connected to the electrode assembly protrudes to both sides of the outside of the battery case; a sealing process of sealing an outer circumferential surface of the battery case after the accommodating process; a coupling process of coupling a coupling clip to the electrode lead after the sealing process; and a transfer process of transferring the cell to a position for a next process after a gripper grips the coupling clip after the coupling process.
    Type: Application
    Filed: May 17, 2021
    Publication date: June 29, 2023
    Applicant: LG Energy Solution, Ltd.
    Inventors: Won Pill Hwang, Sang Woo Lee, Su Taek Jung, Sang Ho Bae, Min Cheol Choi, Jin Gon Kim, Yong Jun Lee
  • Patent number: 11690280
    Abstract: A display device includes a display panel, a support film, and a polymer layer. The display panel includes a display area comprising a first area that is bendable, and a non-display area adjacent to the display area. The support film is coupled to a bottom surface of the display panel. The support film includes a first groove overlapping with the first area. The polymer layer is disposed in the first groove. The polymer layer includes a material with higher flexibility than the support film. Angles formed by the top surface of the support film and inner sides of the support film defining the first groove are acute angles.
    Type: Grant
    Filed: August 2, 2021
    Date of Patent: June 27, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Chang Han Lee, Myung Hwan Kim, Sang Yeol Kim, Woo Hyun Kim, Hyo Jin Kim, Kyoung Il Min, Tae Hyun Sung, Se Joong Shin, Ho Ryun Chung, Jae cheol Choi
  • Publication number: 20230195886
    Abstract: Disclosed herein is a method for securing an indirect function call according to an embodiment of the present invention. The method may include searching for an instruction that indirectly calls a function in intermediate representation code, calculating the number of functions that have to be allowed to be indirectly called based on the found instruction, identifying the address of a function loaded at the N-th lowest address arbitrarily set in advance, among the functions, the number of which is calculated, identifying indexes for selecting callee functions to be indirectly called based on the found instruction, determining whether to allow the function to be called using the identified indexes, and determining, when the function is allowed to be called, whether to allow the function to be called using the address of a callee function, the memory address of which is N-th lowest, among the callee functions.
    Type: Application
    Filed: June 27, 2022
    Publication date: June 22, 2023
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Gae-Il AN, Dong-Wook KANG, Bo-Heung CHUNG, Hong-Il JU, Byeong-Cheol CHOI
  • Publication number: 20230142407
    Abstract: Disclosed herein are an apparatus for analyzing non-informative firmware and a method using the apparatus. The method includes detecting a target instruction for firmware analysis in a memory map in non-informative firmware, generating an analysis list based on memory map information corresponding to the target instruction, and generating a visualized analysis result corresponding to the firmware by grouping the entries of the analysis list by preset reference bytes.
    Type: Application
    Filed: October 25, 2022
    Publication date: May 11, 2023
    Inventors: Dae-Won Kim, Sang-Su Lee, Yong-Je Choi, Byeong-Cheol Choi, Dong-Wook Kang, Yang-Seo Choi
  • Publication number: 20230133648
    Abstract: A composition of aqueous slurry capable of exerting uniform coating on a hydrophobic separator for a secondary battery is disclosed. Unlike other aqueous polymers, a polyvinyl alcohol-based polymer can be physically and chemically bound to a surface of a hydrophobic separator made of polyolefins such as polyethylene, polypropylene, and the like. Therefore, when the aqueous slurry including the polyvinyl alcohol-based polymer is fabricated and a hydrophobic separator is coated with the aqueous slurry, the hydrophobic separator may be smoothly coated with the aqueous slurry.
    Type: Application
    Filed: April 7, 2022
    Publication date: May 4, 2023
    Inventors: Ju Young KIM, Young Gi LEE, Seok Hun KANG, Young Sam PARK, Dong Ok SHIN, Jae Cheol CHOI
  • Publication number: 20230133623
    Abstract: A method for repairing a secondary battery according to an embodiment of the present invention for solving the above problems includes: a step, in which cracks are formed in an outer surface of a battery case of the pouch-type secondary battery; a step of locally applying a metal solution to the cracks; and a step of drying the metal solution to form a coating part.
    Type: Application
    Filed: April 26, 2021
    Publication date: May 4, 2023
    Applicant: LG Energy Solution, Ltd.
    Inventors: Won Pill Hwang, Sang Woo Lee, Su Taek Jung, Sang Ho Bae, Min Cheol Choi, Jin Gon Kim, Yong Jun Lee