Patents by Inventor Sang-Hun Choi

Sang-Hun 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: 20240149733
    Abstract: A power system for an electrified vehicle comprising a first power source device, a first converter having a first end connected to the first power source device, a second power source device, a motor driving device comprising a motor and an inverter, a switch device configured to selectively connect a second end of the first converter to the second power source device or the motor driving device, and a controller configured to control the switch device such that the second end of the first converter is connected to the second power source device when the first power source device is charged with power of the second power source device and such that the second end of the first converter is connected to the motor driving device when the motor performs regenerative braking.
    Type: Application
    Filed: April 19, 2023
    Publication date: May 9, 2024
    Inventors: Min Seong Choi, In Yong Yeo, Jong Eun Byun, Sang Jin Kim, Jin Young Yang, Si Hun Yang
  • Patent number: 11970613
    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: Grant
    Filed: June 26, 2020
    Date of Patent: April 30, 2024
    Assignee: SK MICROWORKS CO., LTD.
    Inventors: Jung Hee Ki, Sunhwan Kim, Sang Hun Choi, Dae Seong Oh, Han Jun Kim, Jin Woo Lee, Dong Jin Lim
  • Publication number: 20240136531
    Abstract: A conductive composite material, a method of preparing the same, and a secondary battery including the same. The conductive composite material may increase the proportion of an active material when forming an electrode by chemically bonding a conductive material and a binder to each other. A method of preparing the conductive composite material comprises ionizing carbon-based particles in a predetermined polarity, ionizing PTFE particles in a polarity different from that of the carbon-based particles, and chemically bonding the ionized carbon-based particles and the ionized PTFE particles, which are ionized in different polarities, to each other.
    Type: Application
    Filed: September 20, 2023
    Publication date: April 25, 2024
    Inventors: Seung Min Oh, Sung Ho Ban, Sang Hun Lee, Ko Eun Kim, Yoon Sung Lee, Chang Hoon Song, Hyeong Jun Choi, Jun Myoung Sheem, Jin Kyo Koo, Young Jun Kim
  • Publication number: 20240071690
    Abstract: A multilayer electronic component includes a body including a plurality of dielectric layers and internal electrodes, and an external electrode disposed on the body and connected to the internal electrodes. The body includes an active portion including the plurality of internal electrodes to form capacitance, and cover portions disposed on the active portion, and the cover portions include an outer cover portion including a carbon compound and an inner cover portion disposed between the active portion and the outer cover portion. An average carbon content (Cc2) of the outer cover portion compared to an average carbon content (Cc1) of the inner cover portion satisfies 100?Cc2/Cc1?10,000.
    Type: Application
    Filed: August 14, 2023
    Publication date: February 29, 2024
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sang Yeop KIM, Jin Il KANG, Ji Hun LEE, Chang Hak CHOI
  • Patent number: 11873372
    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: Grant
    Filed: June 26, 2020
    Date of Patent: January 16, 2024
    Assignee: SK MICROWORKS CO., LTD.
    Inventors: Han Jun Kim, Sunhwan Kim, Dae Seong Oh, Jin Woo Lee, Sang Hun Choi, Jung Hee Ki, Dong Jin Lim
  • Publication number: 20240010803
    Abstract: The embodiments relate to a polyamide-based film that is excellent in solvent resistance and optical properties, to a process for preparing the same, and to a cover window and a display device comprising the same. The polyamide-based film comprises a polyamide-based polymer, wherein when the 3D surface roughness of a first side of the film is measured, the volume (natural volume) between the surface and a reference plane placed at the elevation of the highest peak parallel to the surface plane is 100 ?m3 to 2,800 ?m3.
    Type: Application
    Filed: June 19, 2023
    Publication date: January 11, 2024
    Inventors: Hak Soo LEE, Sang Hun CHOI, Jin Woo LEE
  • Patent number: 11840611
    Abstract: The embodiments relate to a polyamide-based composite film that not only has excellent curl characteristics, mechanical properties, and optical properties, but also exhibits a privacy protection effect at a wide angle of view and glossiness characteristics similar to those glass at a main angle of view, and to a display device comprising the same. There are provided a polyamide-based composite film that comprises a base film comprising a polyamide-based polymer; and a functional layer disposed on the base film, wherein a glossiness control value according to Equation 1 is 0 or more, and a displace device comprising the same.
    Type: Grant
    Filed: August 20, 2021
    Date of Patent: December 12, 2023
    Assignees: SK Microworks Solutions Co., LTD., SK Microworks Co., LTD.
    Inventors: Yun Hee Seo, Sang Hun Choi, Jin Woo Lee, Jung Hee Ki, Dae Seong Oh, Han Jun Kim, Sun Hwan Kim
  • Patent number: 11820893
    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: Grant
    Filed: June 26, 2020
    Date of Patent: November 21, 2023
    Assignee: SK Microworks Co., LTD.
    Inventors: Jung Hee Ki, Sunhwan Kim, Han Jun Kim, Dae Seong Oh, Jin Woo Lee, Sang Hun Choi, Gun Uk Kim
  • Patent number: 11820874
    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: Grant
    Filed: June 26, 2020
    Date of Patent: November 21, 2023
    Assignee: SK Microworks Co., LTD.
    Inventors: Sang Hun Choi, Jin Woo Lee, Dae Seong Oh, Jung Hee Ki, Sunhwan Kim, Han Jun Kim, Heung Sik Kim
  • Publication number: 20230323063
    Abstract: The present invention relates to a polyurethane foam composition and polyurethane foam including a cured product thereof. The polyurethane foam composition comprises a poly mixture comprising a first polyol-based compound having a glass transition temperature of ?50° C. or lower, a second polyol-based compound having a weight-average molecular weight of 5,000 g/mol to 30,000 g/mol and comprising at least three functional groups reactive with an isocyanate group, and a third polyol-based compound having a heat release capacity of 500 J/g·K or less; an isocyanate-based curing agent; and a filler.
    Type: Application
    Filed: August 24, 2021
    Publication date: October 12, 2023
    Applicant: LG Chem, Ltd.
    Inventors: In Suk Yang, Jin Woo Kim, Sang Hun Choi
  • Publication number: 20230287192
    Abstract: In the multilayer film provided with a primer layer of a specific composition comprising a polyester-based resin on a polyamide-based base layer, the adhesive strength with a hard coating layer and an OCA layer to be coated on the surface thereof is excellent, as well as the optical and mechanical properties are also excellent.
    Type: Application
    Filed: February 8, 2023
    Publication date: September 14, 2023
    Inventors: Sang Hun CHOI, Hak Soo LEE, Jin Woo LEE
  • Patent number: 11731410
    Abstract: The embodiments relate to a polyamide-based composite film that has excellent curl characteristics, mechanical properties, and optical properties, as well as, in particular, is effective in preventing reflection in the visible light region, remarkably reduces the rainbow phenomenon, and achieves a texture similar to that of glass, and a display device comprising the same. There are provided a polyamide-based composite film, which comprises a base film comprising a polyamide-based polymer; and a functional layer disposed on the base film, wherein the in-plane retardation (Re) measured with light having a wavelength of 550 nm is 100 nm to 220 nm, and a display device comprising the same.
    Type: Grant
    Filed: April 27, 2022
    Date of Patent: August 22, 2023
    Assignees: SK MICROWORKS CO., LTD., SK microworks solutions Co., Ltd.
    Inventors: Yun-Hee Seo, Sang Hun Choi, Jung Hee Ki, Jin Woo Lee, Dae Seong Oh, Han Jun Kim, Sun Hwan Kim, Heung Sik Kim
  • Patent number: 11713378
    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: Grant
    Filed: June 26, 2020
    Date of Patent: August 1, 2023
    Assignee: SK MICROWORKS CO., LTD.
    Inventors: Jung Hee Ki, Sunhwan Kim, Dae Seong Oh, Jin Woo Lee, Sang Hun Choi, Han Jun Kim, Heung Sik Kim
  • Publication number: 20230097434
    Abstract: The embodiments provide a polyamide-imide-based film, which comprises a polyamide-imide-based polymer, wherein when the coefficients of thermal expansion in the MD direction and TD direction of the film are measured at an interval of 5° C. in a temperature range of 300° C. to 365° C., respectively, the temperature at which the coefficient of thermal expansion in the MD direction or the coefficient of thermal expansion in the TD direction changes from a positive value to a negative value is 330° C. to 345° C., a process for preparing the same, and a cover window and a display device comprising the same.
    Type: Application
    Filed: June 27, 2022
    Publication date: March 30, 2023
    Inventors: Han Jun KIM, Jin Woo LEE, Sang Hun CHOI, Jin Yong LEE, Heung Sik KIM
  • Publication number: 20220402254
    Abstract: The embodiments relate to a polyamide-based composite film that has excellent curl characteristics, mechanical properties, and optical properties, as well as, in particular, is effective in preventing reflection in the visible light region, remarkably reduces the rainbow phenomenon, and achieves a texture similar to that of glass, and a display device comprising the same. There are provided a polyamide-based composite film, which comprises a base film comprising a polyamide-based polymer; and a functional layer disposed on the base film, wherein the in-plane retardation (Re) measured with light having a wavelength of 550 nm is 100 nm to 220 nm, and a display device comprising the same.
    Type: Application
    Filed: April 27, 2022
    Publication date: December 22, 2022
    Inventors: Yun-Hee Seo, Sang Hun Choi, Jung Hee Ki, Jin Woo Lee, Dae Seong Oh, Han Jun Kim, Sun Hwan Kim, Heung Sik Kim
  • Publication number: 20220348728
    Abstract: A polyamide-based composite film with curl characteristics, mechanical characteristics, and optical characteristics, as well as a wide angle of view provided by securing at least a certain level of luminance at various angles, and a display device comprising the same. The polyamide-based composite film comprises a base film comprising a polyamide-based polymer and a functional layer disposed on the base film. When the polyamide-based composite film is placed on a surface light source such that the base film is in contact with the surface light source, light is irradiated from the surface light source, a luminance value (L0) measured in the normal direction of the surface light source is 100%, and a 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: April 20, 2021
    Publication date: November 3, 2022
    Inventors: Sang Hun CHOI, Dae Seong OH, Han Jun KIM, Sun Hwan KIM, Jin Woo LEE, Heung Sik KIM, Jung Hee KI, Yun Hee SEO
  • Publication number: 20220243061
    Abstract: The embodiments relate to a polyamide-imide film excellent in optical properties and mechanical properties, to a process for preparing the same, and to a cover window and a display device comprising the same. There are provided a polyamide-imide film, which comprises a polyamide-imide polymer and has a reduced modulus of a top surface measured by the nanoindentation method according to the ISO 14577-2 standard of 5.6 GPa or more and a haze of 1% or less, a process for preparing the same, and a cover window and a display device comprising the same.
    Type: Application
    Filed: January 18, 2022
    Publication date: August 4, 2022
    Inventors: Sang Hun CHOI, Jin Woo LEE, Jung Hee Ki, Dae Seong OH, Han Jun KIM, Sun Hwan KIM, Heung Sik KIM
  • Publication number: 20220073689
    Abstract: The embodiments relate to a polyamide-based composite film that not only has excellent curl characteristics, mechanical properties, and optical properties, but also exhibits a privacy protection effect at a wide angle of view and glossiness characteristics similar to those glass at a main angle of view, and to a display device comprising the same. There are provided a polyamide-based composite film that comprises a base film comprising a polyamide-based polymer; and a functional layer disposed on the base film, wherein a glossiness control value according to Equation 1 is 0 or more, and a displace device comprising the same.
    Type: Application
    Filed: August 20, 2021
    Publication date: March 10, 2022
    Inventors: Yun Hee SEO, Sang Hun CHOI, Jin Woo LEE, Jung Hee KI, Dae Seong OH, Han Jun KIM, Sun Hwan KIM
  • Patent number: D1015994
    Type: Grant
    Filed: June 29, 2022
    Date of Patent: February 27, 2024
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventors: Hyung Soo Kim, Jong Wan Choi, Sang Hun Yoo
  • Patent number: RE49879
    Abstract: A method and an apparatus for supporting a discontinuous reception (DRX) operation in a Node B in a mobile communication system are provided. The method includes defining a second System Frame Number (SFN) where one cycle of a first SFN corresponds to one bit, transmitting information on the second SFN to a User Equipment (UE), determining a second SFN which is used to transmit a paging signal to the UE, determining a first SFN which is used to transmit the paging signal in the determined second SFN, and transmitting the paging signal to the UE at the determined first SFN.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: March 19, 2024
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-Bum Kim, Sung-Ho Choi, Soeng-Hun Kim, Kyeong-In Jeong, Jung-Soo Jung, Chae-Gwon Lim