Patents by Inventor Seong Choi

Seong 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: 20210039506
    Abstract: An electric power conversion system includes: an AC-DC conversion circuit converting AC charging power into DC power; a motor including a plurality of coils, one end of each being connected to a neutral point; a first switching device selectively allowing or blocking supply of output power from the AC-DC conversion circuit to the neutral point; an inverter including a plurality of motor connection terminals connected to the other ends of the coils of the motor, respectively, DC connection terminals including a positive terminal and a negative terminal, and a plurality of switching elements forming electrical connections between the DC connection terminals and the plurality of motor connection terminals; a battery connected to the DC connection terminals of the inverter; and a controller controlling operations of the AC-DC conversion circuit, the first switching device, and the inverter in accordance with whether or not the battery is charged.
    Type: Application
    Filed: March 11, 2020
    Publication date: February 11, 2021
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Dae Woo LEE, Min Seong CHOI, Si Hun YANG, Jae Eun CHA, Jin Young YANG, In Yong YEO
  • Publication number: 20210032803
    Abstract: A conductive and flexible carbon fiber according to the present disclosure includes a carbon fiber; a resin layer formed on the carbon fiber; and a metal plating layer formed on the resin layer. The resin layer of the carbon and flexible carbon fiber according to the present disclosure is uniformly coated on the carbon fiber, such that a breakage of the carbon fiber during the conductive carbon fiber production process may be prevented. In addition, the metal plating layer having the uniform thickness is plated on the resin layer having the uniform thickness, such that the electric conductivity of the carbon fiber may be improved and the flexibility of the carbon fiber may also be increased. In addition, a production process of the carbon and flexible carbon fiber according to the present disclosure is simplified, such that the production cost and time may be saved.
    Type: Application
    Filed: October 24, 2019
    Publication date: February 4, 2021
    Inventors: Seung Jeong, Young Chul Jin, Jung Hoon Yang, Woo Young Choi, Jae-Hwa Kim, Chun seong Park
  • Publication number: 20210034013
    Abstract: A spatial light modulator according to the inventive concept includes a light modulation layer including a plurality of pixels arranged on a plane perpendicular to a first direction, a first lens array including first lenses corresponding one-to-one with the pixels, a second lens array including second lenses corresponding one-to-one with the first lenses, and a spacer layer between the first lens array and the second lens array. Each of the first lenses has a first central axis extending in the first direction and the first central axes of the first lenses meet at different positions for each of the pixels.
    Type: Application
    Filed: April 13, 2020
    Publication date: February 4, 2021
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seong-Mok CHO, Yong Hae KIM, Sang Hoon CHEON, Kyunghee CHOI, Chi-Sun HWANG
  • Publication number: 20210035496
    Abstract: A display device, includes: a display area and a non-display area; a plurality of signal lines over the display area; and a plurality of connection lines in the display area and connected to the signal lines, wherein the plurality of connection lines includes a plurality of first connection lines connected to the signal lines, respectively, a plurality of third connection lines on a same layer as the first connection lines, and a plurality of second connection lines connecting the first connection lines to the third connection lines.
    Type: Application
    Filed: April 16, 2020
    Publication date: February 4, 2021
    Inventors: Seung Hwan CHO, Jong Hyun CHOI, Ju Chan PARK, Seung Min SONG, Min Seong YI
  • Patent number: 10910660
    Abstract: Disclosed is a method of manufacturing a membrane-electrode assembly for fuel cells. The method includes (a) admixing a metal catalyst, an ionomer and a first dispersion solvent to prepare a first admixture, (b) heat treating the first admixture prepared in (a) to form an ionomer-fixed metal catalyst, and (c) immersing the ionomer-fixed metal catalyst formed in (b) in a solvent, wherein the solvent in (c) may include one or more selected from the group consisting of ethanol, propanol, and isopropyl alcohol. The membrane-electrode assembly for fuel cells manufactured by the method may have substantially improved durability.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: February 2, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dae Yong Son, Yoon Hwan Cho, Jin Seong Choi, Yong Min Kim
  • Patent number: 10903294
    Abstract: A display device includes a display part including a plurality of pixels arranged on a substrate, a plurality of dams in a first peripheral part adjacent to the display part, the plurality of dams being extended in a longitudinal direction of the first peripheral part and arranged in a direction crossing the longitudinal direction, the plurality of dams including a stack of a first organic insulating layer and a second organic insulating layer, and a blocking part disposed between the plurality of dams and corresponding to a removed portion of the first and second organic insulating layers.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: January 26, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ki Ho Bang, Nayun Kwak, Eunhye Kim, Sae bom Ahn, Seong Ryoung Lee, Sanghyun Jun, Wonsuk Choi
  • Publication number: 20210020724
    Abstract: A display device may include a display panel including a display area, a non-display area which may be disposed on a periphery of the display area, and a pad area which may be disposed on one side of the non-display area. The display panel may include data lines disposed in the display area of the display panel along a second direction which intersects a first direction, and connection lines disposed in the display area of the display panel along the first direction. A first data line among the data lines may be connected to a first connection line among the connection lines.
    Type: Application
    Filed: March 10, 2020
    Publication date: January 21, 2021
    Applicant: Samsung Display Co., LTD.
    Inventors: Seung Hwan CHO, Jong Hyun CHOI, Ju Chan PARK, Seung Min SONG, Min Seong YI
  • Publication number: 20210013306
    Abstract: A semiconductor device includes a substrate including a first active pattern and a second active pattern, a device isolation layer filling a first trench between the first and second active patterns, the device isolation layer including a silicon oxide layer doped with helium, a helium concentration of the device isolation layer being higher than a helium concentration of the first and second active patterns, and a gate electrode crossing the first and second active patterns.
    Type: Application
    Filed: September 22, 2020
    Publication date: January 14, 2021
    Inventors: Kyungin CHOI, Hyunchul SONG, Sunjung KIM, Taegon KIM, Seong Hoon JEONG
  • Publication number: 20210006850
    Abstract: Provided is a method and system for reducing a transmission time of a media file through concurrent processing of encoding and uploading. A media file transmission method relates to transcoding a media file at a client and uploading the transcoded media file to a server, and performs transcoding by splitting the media file based on a unit size, and here, concurrently processes transcoding of a subsequent split unit file and uploading of a previous split unit file at a point in time at which transcoding of the previous split unit file is completed.
    Type: Application
    Filed: July 1, 2020
    Publication date: January 7, 2021
    Applicant: LINE PLUS CORPORATION
    Inventors: Tae Ho Ha, Hae Seong Choi
  • Patent number: 10884620
    Abstract: A method of controlling a display device including a touch screen is provided. The method includes setting an application execution space having one or more sub spaces in which windows executing applications are arranged, arranging windows corresponding to one or more applications which are being executed in the sub spaces of the set application execution space, displaying a first sub space corresponding to one of the one or more sub spaces on the touch screen, receiving a data sharing command for sharing data included in a first window arranged in the first sub space, and sharing the data to be shared by a second window arranged in a second sub space corresponding to one of the one or more sub spaces based on the data sharing command.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: January 5, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae-Soo Kim, Kang-Tae Kim, Doo-Hwan Kim, Chul-Joo Kim, Seong Choi
  • Patent number: 10884065
    Abstract: Provided are apparatus and method of testing electrochemical performance of a battery cell in a nondestructive manner The apparatus according to an embodiment of the present disclosure includes: a memory configured to store first profile data, second profile data, a first positive electrode upper limit, a first positive electrode lower limit, a first negative electrode upper limit, and a first negative electrode lower limit that are determined in advance through a preliminary experiment with respect to each of a plurality of reference cells; a sensing unit configured to measure an open-circuit voltage of a test cell according to a variation in a state of charge (SOC) of the test cell; and a controller electrically connected to the memory and the sensing unit. The controller is configured to test performance of the test cell in a nondestructive manner based on data regarding the reference cells and data measured by the sensing unit stored in the memory.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: January 5, 2021
    Inventors: Jin-Hyung Lim, Du-Seong Yoon, Won-Tae Joe, Yong-Seok Choi
  • Publication number: 20200407506
    Abstract: Embodiments relate to a polyamide-imide film that maintains its mechanical properties at least at a certain level under the conditions of high temperatures and low temperatures and is excellent in transparency and folding characteristics, a process for preparing the same, and a cover window comprising the same. The polyamide-imide film comprises a polyamide-imide polymer and has an MOR value defined in Equation 1a of 75% or more.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 31, 2020
    Inventors: Han Jun KIM, Sunhwan KIM, Dae Seong OH, Jin Woo LEE, Sang Hun CHOI, Jung Hee KI, Dong Jin LIM
  • Publication number: 20200407507
    Abstract: Embodiments relate to a polymer film for a display that maintains a clean appearance and transparency and is excellent in antiblocking properties by securing a certain range of optical slip index (OS), a process for preparing the same, and a front panel and a display device comprising the same. The polymer film comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin and a filler and has an optical slip index (0.5) of less than 0.5.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 31, 2020
    Inventors: Dae Seong OH, Sunhwan KIM, Han Jun KIM, Jin Woo LEE, Sang Hun CHOI, Jung Hee KI
  • Publication number: 20200407519
    Abstract: The polymer film according to an embodiment comprises at least one polymer resin selected from the group consisting of a polyamide-based resin, a polyimide-based resin, and a polyamide-imide-based resin, and has a haze of 0.6% or less and an in-plane retardation within a specific range for each wavelength band in the visible light region. The polymer film, which has an in-plane retardation within a specific range for each wavelength band in the visible light region, is excellent in transparency and optical properties, and it can remarkably reduce the rainbow phenomenon and improve the reflection appearance.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 31, 2020
    Inventors: Jung Hee KI, Sunhwan KIM, Dae Seong OH, Jin Woo LEE, Sang Hun CHOI, Han Jun KIM, Heung Sik KIM
  • Publication number: 20200409413
    Abstract: Embodiments relate to a base film that is colorless, transparent, and excellent in mechanical properties and optical properties, particularly with low moisture permeability, a process for preparing the same, and a cover window and a display device comprising the same. The cover window comprises a base film comprising a polyamide-based polymer and having a moisture permeability of 300 g/m2┬Ěday or less; and a functional layer.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 31, 2020
    Inventors: Sunhwan KIM, Jung Hee KI, Han Jun KIM, Dae Seong OH, Jin Woo LEE, Sang Hun CHOI
  • Publication number: 20200407521
    Abstract: Embodiments relate to a polyamide-imide film that has a clean appearance and transparency and is excellent in antiblocking properties, a process for preparing the same, and a display front panel and a display device comprising the same. The polyamide-imide film comprises a polyamide-imide polymer formed by polymerizing a diamine compound, a dianhydride compound, and a dicarbonyl compound; and a filler, wherein the dicarbonyl compound comprises a first dicarbonyl compound and a second dicarbonyl compound, the first dicarbonyl compound and the second dicarbonyl compound are structural isomers to each other, and the FH value of Equation 1 is 0.5 or less.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 31, 2020
    Inventors: Dae Seong OH, Jung Hee KI, Sunhwan KIM, Han Jun KIM, Jin Woo LEE, Sang Hun CHOI
  • Publication number: 20200407522
    Abstract: Embodiments relate to a polyamide-based film that is colorless and transparent, is excellent in mechanical properties and optical properties, has a wide angle of view by securing at least a certain level of luminance at various angles, and, in particular, has gloss characteristics similar to those of glass, a process for preparing the same, and a cover window comprising the same. The polyamide-based film comprises a polyamide-based polymer, wherein when the polyamide-based film is placed on a surface light source, light is irradiated from the surface light source, and the luminance value (L0) measured in the normal direction of the surface light source is 100%, the luminance value (L50) measured in the direction of 50┬░ from the normal direction of the surface light source is 25% or more.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 31, 2020
    Inventors: Sang Hun Choi, Jin Woo Lee, Dae Seong Oh, Jung Hee Ki, Sunhwan Kim, Han Jun Kim, Heung Sik Kim
  • Publication number: 20200407557
    Abstract: Embodiments relate to a polymer film. The polymer film comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin and has a haze (HZ0) before autoclave treatment of 3% or less and a ?HZ24 represented by Equation 1a of 500% or less.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 31, 2020
    Inventors: Jung Hee KI, Sunhwan KIM, Sang Hun CHOI, Dae Seong OH, Han Jun KIM, Jin Woo LEE, Dong Jin LIM
  • Publication number: 20200407556
    Abstract: Embodiments relate to a polymer film that is excellent in folding characteristics and transparency and maintains excellent mechanical properties even after repeated elongation and shrinkage in the elastic region, a process for preparing the same, and a front panel and a display device comprising the same. The polymer film comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin and has an MOR0/9 of Equation A of 2% or less.
    Type: Application
    Filed: June 26, 2020
    Publication date: December 31, 2020
    Inventors: Jung Hee KI, Sunhwan KIM, Han Jun KIM, Dae Seong OH, Jin Woo LEE, Sang Hun CHOI, Gun Uk KIM
  • Patent number: 10872879
    Abstract: A semiconductor package and a method of manufacturing a semiconductor package. As a non-limiting example, various aspects of this disclosure provide a semiconductor package, and method of manufacturing thereof, that comprises shielding on multiple sides thereof.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: December 22, 2020
    Assignee: Amkor Technology Singapore Holding Pte. Ltd.
    Inventors: Jin Seong Kim, Edwin J. Adlam, Ludovico E. Bancod, Gi Jung Kim, Robert Lanzone, Jae Ung Lee, Yung Woo Lee, Mi Kyeong Choi