Patents by Inventor Keun Ahn

Keun Ahn 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: 20250163532
    Abstract: Provided is a non-oriented electrical steel sheet including silicon (Si): 2.8 wt % to 3.8 wt %, manganese (Mn): 0.2 wt % to 0.5 wt %, aluminum (Al): 0.5 wt % to 1.5 wt %, carbon (C): more than 0 wt % and not more than 0.003 wt %, phosphorus (P): more than 0 wt % and not more than 0.015 wt %, sulfur(S): more than 0 wt % and not more than 0.003 wt %, nitrogen (N): more than 0 wt % and not more than 0.003 wt %, titanium (Ti): more than 0 wt % and not more than 0.003 wt %, and a balance of iron (Fe) and other unavoidable impurities, wherein second-phase particles with an average diameter of 1.0 ?m or more among second-phase particles constituting a microstructure of the non-oriented electrical steel sheet have a volume fraction of 60% or more, and wherein the non-oriented electrical steel sheet has a core loss (W10/400) of 12.0 W/kg or less.
    Type: Application
    Filed: January 17, 2025
    Publication date: May 22, 2025
    Inventors: Yong Keun Ahn, Chun Ku Kang, Kyeong Sik Shin, Geun Ho Park
  • Publication number: 20250115753
    Abstract: A thermoplastic resin composition includes an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A) including a seed obtained by polymerizing 35 to 58% by weight of an alkyl acrylate and 42 to 65% by weight of an aromatic vinyl compound, a rubber core formed to surround the seed and obtained by polymerizing 78 to 91% by weight of an alkyl acrylate and 9 to 22% by weight of an aromatic vinyl compound, and a graft shell formed to surround the rubber core and obtained by polymerizing 65 to 82% by weight of an aromatic vinyl compound, 12 to 30% by weight of a vinyl cyanide compound, and 3 to 15% by weight of an alkyl acrylate; and a non-graft copolymer (B) including an alkyl (meth)acrylate, an alkyl-substituted styrene-based compound, and a vinyl cyanide compound.
    Type: Application
    Filed: May 31, 2023
    Publication date: April 10, 2025
    Inventors: Jiyoon JEON, Bong Keun AHN, Min Jung KIM, Jangwon PARK, Eunji LEE, Seyong KIM
  • Publication number: 20250101215
    Abstract: A thermoplastic resin composition includes an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A) including a seed obtained by polymerizing 45 to 72% by weight of an alkyl acrylate and 28 to 55% by weight of an aromatic vinyl compound, a rubber core formed to surround the seed and obtained by polymerizing 78 to 91% by weight of an alkyl acrylate and 9 to 22% by weight of an aromatic vinyl compound, and a graft shell formed to surround the rubber core and obtained by polymerizing 65 to 82% by weight of an aromatic vinyl compound, 12 to 30% by weight of a vinyl cyanide compound, and 3 to 15% by weight of an alkyl acrylate; and a non-graft copolymer (B) including an alkyl (meth)acrylate, an aromatic vinyl compound, and a vinyl cyanide compound.
    Type: Application
    Filed: May 31, 2023
    Publication date: March 27, 2025
    Inventors: Jangwon PARK, Bong Keun AHN, Min Jung KIM, Jiyoon JEON, Eunji LEE, Seyong KIM
  • Publication number: 20250092483
    Abstract: Provided is a method of manufacturing a non-oriented electrical steel sheet, the method including first hot-rolling each of first and second steel materials containing silicon (Si), manganese (Mn), and aluminum (Al), forming a first laminated structure by laminating the first hot-rolled first and second steel materials, forming a second laminated structure by second hot-rolling the first laminated structure, forming a third laminated structure by cold-rolling the second laminated structure, and cold-annealing the third laminated structure.
    Type: Application
    Filed: November 27, 2024
    Publication date: March 20, 2025
    Inventors: Kyeong Sik Shin, Chun Ku Kang, Yong Keun Ahn
  • Publication number: 20250092245
    Abstract: The present invention relates to a thermoplastic resin composition, a method of preparing the same, and a molded article including the same, and more particularly, to a thermoplastic resin composition having eco-friendliness and excellent molding processability, mechanical rigidity, heat resistance, and colorability by including a predetermined ASA-based graft copolymer and a recycled resin, a method of preparing the thermoplastic resin composition, and a molded article including the thermoplastic resin composition.
    Type: Application
    Filed: July 24, 2023
    Publication date: March 20, 2025
    Inventors: Min Jung KIM, Yong Yeon HWANG, Bong Keun AHN, Jangwon PARK, Jiyoon JEON, Eunji LEE, Seyong KIM, Gyeongdong YEOM
  • Patent number: 12134671
    Abstract: The present invention relates to an alkyl acrylate compound-vinyl cyanide compound-aromatic vinyl compound graft copolymer including a seed prepared by polymerizing one or more compounds selected from the group consisting of an alkyl acrylate compound, an aromatic vinyl compound, and a vinyl cyanide compound and a multifunctional crosslinking agent; a core formed to surround the seed and prepared by polymerizing an alkyl acrylate compound and a multifunctional crosslinking agent; and a graft shell formed to surround the core and prepared by polymerizing an aromatic vinyl compound and a vinyl cyanide compound, wherein the multifunctional crosslinking agent has a weight average molecular weight of 600 to 1,400 g/mol, a method of preparing the alkyl acrylate compound-vinyl cyanide compound-aromatic vinyl compound graft copolymer, and a thermoplastic resin composition including the alkyl acrylate compound-vinyl cyanide compound-aromatic vinyl compound graft copolymer.
    Type: Grant
    Filed: November 3, 2020
    Date of Patent: November 5, 2024
    Assignee: LG CHEM, LTD.
    Inventors: Seyong Kim, Yong Yeon Hwang, Bong Keun Ahn, Min Jung Kim, Jang Won Park, Ji Yoon Jeon, Eun Ji Lee
  • Patent number: 12129374
    Abstract: The present invention relates to an acrylic graft copolymer, a method of preparing the same, and a thermoplastic resin composition including the same. More specifically, the acrylic graft copolymer of the present invention includes a seed, a core, and a graft shell. In this case, the graft shell includes 0.05 to 2 parts by weight of a reactive ultraviolet stabilizer based on 100 parts by weight of the acrylic graft copolymer, and the graft shell has an average particle diameter of 80 to 140 nm (greater than the average particle diameter of the core). The acrylic graft copolymer of the present invention has excellent impact strength, tensile strength, weather resistance, and surface gloss. In addition, when the acrylic graft copolymer is used, mold deposits may be reduced.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: October 29, 2024
    Assignee: LG CHEM, LTD.
    Inventors: Bong Keun Ahn, Yong Yeon Hwang, Min Jung Kim, Jang Won Park, Jiyoon Jeon, Eunji Lee, Seyong Kim
  • Publication number: 20240309198
    Abstract: The present disclosure relates to a thermoplastic resin composition, a method of preparing the same, and a molded article manufactured using the same. The thermoplastic resin composition includes graft copolymer (A) including a polymer seed including 51 to 77 % by weight of an alkyl (meth)acrylate and 23 to 49% by weight of an aromatic vinyl compound, a rubber core surrounding the polymer seed and including 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound, and a graft shell surrounding the rubber core and including 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyanide compound, and 3 to 15% by weight of an alkyl acrylate; and a non-graft copolymer (B) including an alkyl (meth)acrylate, an alkyl-substituted styrene-based compound, and a vinyl cyanide compound.
    Type: Application
    Filed: August 25, 2022
    Publication date: September 19, 2024
    Applicant: LG CHEM, LTD.
    Inventors: Jiyoon JEON, Bong Keun AHN, Min Jung KIM, Jangwon PARK, Eunji LEE, Seyong KIM
  • Publication number: 20240301192
    Abstract: A thermoplastic resin composition includes an alkyl acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A) including a seed obtained by polymerizing 45 to 72% by weight of an alkyl acrylate and 28 to 55% by weight of an aromatic vinyl compound, a rubber core formed to surround the seed and obtained by polymerizing 78 to 91% by weight of an alkyl acrylate and 9 to 22% by weight of an aromatic vinyl compound, and a graft shell formed to surround the rubber core and obtained by polymerizing 65 to 82% by weight of an aromatic vinyl compound, 12 to 30% by weight of a vinyl cyanide compound, and 3 to 15% by weight of an alkyl acrylate; and a non-graft copolymer (B) including an alkyl (meth)acrylate, an aromatic vinyl compound, a vinyl cyanide compound, and an imide-based compound.
    Type: Application
    Filed: May 31, 2023
    Publication date: September 12, 2024
    Inventors: Eunji LEE, Bong Keun AHN, Min Jung KIM, Jangwon PARK, Jiyoon JEON, Seyong KIM
  • Publication number: 20240279455
    Abstract: A thermoplastic resin composition including an alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A) including a polymer seed including 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, a rubber core surrounding the polymer seed and including 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound, and a graft shell surrounding the rubber core and including 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyanide compound, and 3 to 15% by weight of an alkyl acrylate; and a non-graft copolymer (B) including an alkyl (meth)acrylate, an aromatic vinyl compound, a vinyl cyanide compound, and an imide-based compound. The present disclosure also relates to a preparation method and a molded article.
    Type: Application
    Filed: August 1, 2022
    Publication date: August 22, 2024
    Applicant: LG CHEM, LTD.
    Inventors: Eunji LEE, Bong Keun AHN, Min Jung KIM, Jangwon PARK, Jiyoon JEON, Seyong KIM
  • Publication number: 20240254326
    Abstract: A thermoplastic resin composition including an alkyl (meth)acrylate-aromatic vinyl compound-vinyl cyanide compound graft copolymer (A) including a polymer seed including 70 to 85% by weight of an alkyl (meth)acrylate and 15 to 30% by weight of an aromatic vinyl compound, a rubber core surrounding the polymer seed and including 78 to 90% by weight of an alkyl acrylate and 10 to 22% by weight of an aromatic vinyl compound, and a graft shell surrounding the rubber core and including 65 to 80% by weight of an aromatic vinyl compound, 14 to 25% by weight of a vinyl cyanide compound, and 3 to 15% by weight of an alkyl (meth)acrylate; and a non-graft copolymer (B) including an alkyl (meth)acrylate, an aromatic vinyl compound, and a vinyl cyanide compound. The present disclosure also relates to a preparation method and a molded article.
    Type: Application
    Filed: August 1, 2022
    Publication date: August 1, 2024
    Applicant: LG CHEM, LTD.
    Inventors: Jangwon PARK, Bong Keun AHN, Min Jung KIM, Jiyoon JEON, Eunji LEE, Seyong KIM
  • Patent number: 11928588
    Abstract: Disclosed is an in-memory device for operation of a multi-bit weight. A multi-bit memory cell array according to an exemplary embodiment of the present invention includes at least one multi-bit unit which stores input data based on an input signal and outputs a per-group sum value summed for every group by applying a multi-bit weight to the stored input data; and a final summation unit which is connected to at least one multi-bit unit, adjusts a ratio for every group to receive the peer-group sum value, and outputs a final output value by summing the input per-group sum value.
    Type: Grant
    Filed: August 19, 2020
    Date of Patent: March 12, 2024
    Assignee: UIF (University Industry Foundation), Yonsei University
    Inventors: Seong Ook Jung, Hong Keun Ahn, Young Kyu Lee
  • Patent number: 11916269
    Abstract: A charging system may include a plurality of fuel cell stacks configured to receive hydrogen from a hydrogen supply unit and generate power, a plurality of charging dispensers configured to be electrically connected to a load device and configured to provide power upon connected to the load device, and a controller configured to distribute and supply the power generated by the plurality of fuel cell stacks to a charging dispenser to which the load device is connected, to compare a total available power amount of the plurality of fuel cell stacks with a total power demand amount of the charging dispenser to which the load device is connected, and to control a power generation amount of each of the plurality of fuel cell stacks according to a result of the comparing.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: February 27, 2024
    Assignees: Hyundai Motor Company, Kia Corporation
    Inventors: Deuk Keun Ahn, Jae Min Son
  • Patent number: 11820851
    Abstract: The present invention relates to a method of preparing a graft copolymer powder, which includes: preparing a seed by adding one or more selected from the group consisting of an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer and a vinyl cyan-based monomer to a reactor and carrying out polymerization; preparing a core in the presence of the seed by adding an alkyl (meth)acrylate-based monomer and carrying out polymerization; and preparing a graft copolymer latex in the presence of the core by adding an aromatic vinyl-based monomer and a vinyl cyan-based monomer and carrying out polymerization; adding an alkyl methacrylate-based polymer to the graft copolymer latex and carrying out coagulation, and more particularly, to a method of preparing a graft copolymer powder that is excellent in weather resistance, fluidity, mechanical properties, surface gloss and appearance quality.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: November 21, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Min Jung Kim, Yong Yeon Hwang, Bong Keun Ahn, Wang Rae Joe, Jang Won Park, Ji Yoon Jeon
  • Publication number: 20230368737
    Abstract: Disclosed herein are methods and corresponding systems and devices for compensating burn-in in an electronic display. When the electronic display is divided into multiple regions, each region can have a separate compensation parameter associated with it. The compensation parameter can be determined through estimating pixel degradation based on how the region was used over the lifetime of the electronic display, for instance, the brightness of images previously displayed in the region. Although each region may have its own compensation parameter, burn-in compensation can be performed by selecting one compensation parameter from among a set of stored parameters for use as a global compensation parameter applied across all the display pixels, i.e., the entire display area. The global compensation parameter can be selected based on which region a user is looking at. Accordingly, a display system can include or be coupled to an eye-tracking unit that monitors eye movement.
    Type: Application
    Filed: July 24, 2023
    Publication date: November 16, 2023
    Inventors: Byung Geun JUN, Jeong-Keun AHN, Min Hyuk CHOI
  • Patent number: 11568828
    Abstract: A transceiver system includes a transmitter including a first driving signal output unit and a second driving signal output unit and a receiver including a first sensing signal input unit and a second sensing signal input unit. A first channel includes a first input/output line and a second input/output line that connect the first driving signal output unit and the first sensing signal input unit, and are configured to transfer signals having different phases; a second channel including a third input/output line and a fourth input/output line that connect the second driving signal output unit and the second sensing signal input unit, and are configured to transfer signals having different phases; and a first compensation capacitor including a first electrode electrically connected to the second input/output line and a second electrode electrically connected to the third input/output line.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: January 31, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jeong Keun Ahn
  • Patent number: 11568813
    Abstract: Embodiments relate to a pixel circuit of a display with a pixel level burn-in compensation. The pixel circuit includes a light-emitting diode (LED), a first driving transistor between a voltage source and the LED, an enable transistor coupled to a gate electrode of the first driving transistor, and a second driving transistor connected between the voltage source and the LED. The first driving transistor provides first current from the voltage source to the LED according to a gate voltage of the first driving transistor. The enable transistor turns on responsive to a voltage level at an anode of the LED increasing to a threshold voltage level. The second driving transistor provides second current from the voltage source to the LED according to a version of the gate voltage of the first driving transistor received at a gate electrode of the second driving transistor via the enable transistor.
    Type: Grant
    Filed: May 10, 2022
    Date of Patent: January 31, 2023
    Assignee: Meta Platforms Technologies, LLC
    Inventors: Jeong-Keun Ahn, Zhiming Zhuang, Min Hyuk Choi
  • Patent number: 11568816
    Abstract: Embodiments of the present disclosure relate to a pixel circuit with a burn-in compensation. The pixel circuit includes a light-emitting diode (LED), a first driving transistor between a voltage source and the LED, a switching transistor coupled to a gate electrode of the first driving transistor, and a second driving transistor connected between the voltage source and the LED. The first driving transistor provides first current from the voltage source to the LED according to a gate voltage of the first driving transistor. The switching transistor is turned on after receiving an enable signal. The second driving transistor provides second current from the voltage source to the LED according to a version of the gate voltage of the first driving transistor received at a gate of the second driving transistor via the switching transistor.
    Type: Grant
    Filed: February 3, 2022
    Date of Patent: January 31, 2023
    Assignee: Meta Platforms Technologies, LLC
    Inventors: Jeong-Keun Ahn, Min Hyuk Choi, Zhiming Zhuang
  • Publication number: 20220403153
    Abstract: The present disclosure relates to a thermoplastic resin having excellent impact strength, gloss, fluidity, and non-whitening properties and a method of preparing the same. The thermoplastic resin including an alkyl acrylate-alkyl methacrylate graft copolymer (A), or an alkyl acrylate-alkyl methacrylate graft copolymer (A) and a matrix resin (B) including one or more selected from the group consisting of an aromatic vinyl compound, a vinyl cyanide compound, an alkyl methacrylate, and an alkyl acrylate, wherein a total content of the alkyl acrylate is 20 to 50% by weight, and a butyl acrylate coverage value (X) as calculated by Equation 1 below is 50 or more. X={(G?Y)/Y}×100??[Equation 1] In Equation 1, G represents the total gel content (%) of the thermoplastic resin, and Y represents the content (% by weight) of butyl acrylate in the gel of the thermoplastic resin.
    Type: Application
    Filed: July 19, 2021
    Publication date: December 22, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Min Jung KIM, Yong Yeon HWANG, Bong Keun AHN, Jangwon PARK, Jiyoon JEON, Eunji LEE, Seyong KIM
  • Publication number: 20220372269
    Abstract: The present disclosure relates to a thermoplastic resin having excellent non-whitening properties, impact strength, gloss, and fluidity, and a method of preparing the thermoplastic resin. The thermoplastic resin includes an alkyl acrylate-alkyl methacrylate graft copolymer (A), or the copolymer (A) and a matrix resin (B) including one or more selected from the group consisting of an aromatic vinyl compound-vinyl cyanide compound-alkyl methacrylate copolymer and an alkyl methacrylate polymer. A transparency measured under a condition of 3 mm thickness is less than 5, the total content of the alkyl acrylate is 20 to 50% by weight, and an alkyl acrylate coverage value (X) as calculated by Equation 1 below is 65 or more: X={(G?Y)/Y}×100,??[Equation 1] wherein G represents the total gel content (%) of the thermoplastic resin, and Y represents the content of alkyl acrylate in the gel contained in the thermoplastic resin.
    Type: Application
    Filed: July 19, 2021
    Publication date: November 24, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Jiyoon JEON, Yong Yeon HWANG, Bong Keun AHN, Min Jung KIM, Jangwon PARK, Eunji LEE, Seyong KIM