Patents by Inventor Cheolmin Park

Cheolmin Park 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).

  • Patent number: 11696709
    Abstract: The present invention relates to a liquid information sensor comprises at least more than one electrode set including a first electrode, and a second electrode which is disposed spaced apart from the first electrode and to which an alternating current signal is applied between the first electrode and the second electrode; and a ferroelectric layer including a first side in contact with the first electrode and the second electrode and a second side facing the first side and defining a receiving area for receiving the target liquid, and generating sound waves by physical vibration when the AC signal is applied.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: July 11, 2023
    Assignee: UNIVERSITY-INDUSTRY FOUNDATION (UIF), YONSEI UNIVERSITY
    Inventors: Cheolmin Park, Jong Sung Kim, Eui Hyuk Kim, Chanho Park
  • Patent number: 11695097
    Abstract: A light-emitting device according to the present invention comprises, an electrode unit including a first electrode and a second electrode spaced apart from each other, with electrical signals having different polarity applying the first and second electrode, respectively; a first stimulation unit disposed on one surface of the electrode unit and having a first stimulation reaction layer expressing variable luminance according to a first stimulation; and a second stimulation unit disposed on the other surface facing the one surface of the electrode unit, and having a second stimulation reaction layer expressing a variable luminance according to a second stimulation different from the first stimulation.
    Type: Grant
    Filed: November 25, 2020
    Date of Patent: July 4, 2023
    Assignee: UNIVERSITY-INDUSTRY FOUNDATION (UIF), YONSEI UNIVERSITY
    Inventors: Cheolmin Park, Woo Kyoung Jin, Eui Hyuk Kim
  • Patent number: 11691911
    Abstract: A method of manufacturing a window member includes performing a first reinforcement operation including performing a first ion-exchange treatment on an initial window member. The first ion-exchange treatment includes applying ion salts at a temperature equal to or greater than a first temperature of about 500° C. A stress relief operation includes performing a heat treatment and/or a salt treatment on the initial window member to which the first reinforcement operation is performed. A second reinforcement operation includes performing a second ion-exchange treatment on the initial window member to which the stress relief operation is performed.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: July 4, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hoikwan Lee, Cheolmin Park, Eun-Kyung Yeon, Jeongseok Lee, Seungho Kim
  • Patent number: 11692130
    Abstract: A synchronized piezoelectric and luminescence (SPL) material includes a core layer including light-emitting particles and a shell layer which is attached onto a surface of the core layer and includes ligands having a piezoelectric property. Therefore, a piezoelectric property and a luminescent property can be simultaneously implemented using a single SPL material in which piezoelectric ligands and light-emitting particles are chemically coupled.
    Type: Grant
    Filed: November 30, 2020
    Date of Patent: July 4, 2023
    Assignee: UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
    Inventors: Cheolmin Park, Seokyeong Lee, Joona Bang, Jaewan Ko, Taewoo Lee, Sungjin Kim
  • Publication number: 20230184687
    Abstract: The present invention relates to a humidity-sensing structural color emitting laminate and a structural color display device self-powered by triboelectricity including the same, and more specifically to a structural color display device self-powered by triboelectricity, which can directly sense humidity among human body signals and display the same in structural color immediately without a separate power source and without data processing, and a humidity-sensing structural color emitting laminate for implementing the same.
    Type: Application
    Filed: November 15, 2022
    Publication date: June 15, 2023
    Inventors: Cheolmin PARK, Taebin KIM, Jae Won LEE
  • Patent number: 11654671
    Abstract: A method for manufacturing a display device includes providing a first display device assembly comprising a display module, a first window disposed on the display module, a first window adhesive layer disposed between the display module and the first window, and a first protective layer disposed on the first window. The first protective layer is removed. The first window is removed by providing an acid solution on the first display device assembly. A second window is provided that is disposed on the display module after the first window is removed. A second protective layer is provided that is disposed on the second window after the first protective layer is removed.
    Type: Grant
    Filed: February 16, 2022
    Date of Patent: May 23, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Cheolmin Park, Byunghoon Kang, Byeong-Beom Kim, Seungho Kim, Changmoo Lee, Hoikwan Lee
  • Patent number: 11631444
    Abstract: A high bandwidth memory system includes a motherboard; and a semiconductor package coupled to the motherboard. The semiconductor package includes a package substrate mounted on the motherboard and including signal lines providing a plurality of channels; a first semiconductor device mounted on the package substrate and including a first physical layer (PHY) circuit; and a second semiconductor device mounted on the package substrate and including a second PHY circuit. The first semiconductor device and the second semiconductor device exchange a data signal with each other through the plurality of channels, the data signal is a multilevel signal having M levels, where M is a natural number greater than 2, and the first PHY circuit compensates for distortion of the channels and performs digital signal processing to compensate for a mismatch between the channels.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: April 18, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Byungsuk Woo, Changkyu Seol, Cheolmin Park, Sucheol Lee, Chanik Park
  • Publication number: 20220339926
    Abstract: A method for manufacturing a display device includes providing a first display device assembly comprising a display module, a first window disposed on the display module, a first window adhesive layer disposed between the display module and the first window, and a first protective layer disposed on the first window. The first protective layer is removed. The first window is removed by providing an acid solution on the first display device assembly. A second window is provided that is disposed on the display module after the first window is removed. A second protective layer is provided that is disposed on the second window after the first protective layer is removed.
    Type: Application
    Filed: February 16, 2022
    Publication date: October 27, 2022
    Inventors: CHEOLMIN PARK, Byunghoon Kang, Byeong-Beom Kim, Seungho Kim, Changmoo Lee, Hoikwan Lee
  • Patent number: 11454835
    Abstract: Disclosed are a light emission device including a magnetoactive element, a method of fabricating the same, and an electronic device including the light emission device. The disclosed light emission device may include a light emission layer; a first electrode and a second electrode spaced apart from each other on a first surface side of the light emission layer; and a magnetoactive fluid layer disposed on a second surface side of the light emission layer and having a plurality of nanostructures of which arrangement and distribution is configured to change according to application of a magnetic field. The light emitting properties of the light emission layer may be changed according to the arrangement and distribution of a plurality of nanostructures in the magnetoactive fluid layer. The plurality of nanostructures may include conductive nanowire and magnetic nanoparticle provided on the surfaces of the conductive nanowire.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: September 27, 2022
    Assignee: UNIVERSITY-INDUSTRY FOUNDATION (UIF), YONSEI UNIVERSITY
    Inventors: Cheolmin Park, Soyeon Baek, Seung Won Lee
  • Publication number: 20220272855
    Abstract: A cover window includes a lower surface and an upper surface opposite to the lower surface. The upper surface includes: a center area extending in a first direction and being spaced apart from the lower surface by a first interval in a thickness direction; a first curved area extending in a curved shape from a first side of the center area; and a first area extending from the first curved area in the first direction and being spaced apart from the lower surface by a second interval in the thickness direction; and the first curved area includes a first partial area concavely extending from the center area and a second partial area convexly extending from the first partial area in a cross-sectional view.
    Type: Application
    Filed: August 31, 2021
    Publication date: August 25, 2022
    Inventors: Changmoo Lee, Byunghoon Kang, Cheolmin Park, Seungho Kim, Hoikwan Lee
  • Publication number: 20220258297
    Abstract: A method of manufacturing a window may include cutting a window having a uniform thickness of about 20 ?m to about 100 ?m and polishing a cut surface of the window with a polishing pad having an elastic modulus less than an elastic modulus of the window while applying slurry to the cut surface of the window.
    Type: Application
    Filed: September 28, 2021
    Publication date: August 18, 2022
    Inventors: CHEOLMIN PARK, SEUNGHO KIM, HOIKWAN LEE, BYUNGHOON KANG, SEUNG KIM, CHANGMOO LEE
  • Publication number: 20220238146
    Abstract: A high bandwidth memory system includes a motherboard; and a semiconductor package coupled to the motherboard. The semiconductor package includes a package substrate mounted on the motherboard and including signal lines providing a plurality of channels; a first semiconductor device mounted on the package substrate and including a first physical layer (PHY) circuit; and a second semiconductor device mounted on the package substrate and including a second PHY circuit. The first semiconductor device and the second semiconductor device exchange a data signal with each other through the plurality of channels, the data signal is a multilevel signal having M levels, where M is a natural number greater than 2, and the first PHY circuit compensates for distortion of the channels and performs digital signal processing to compensate for a mismatch between the channels.
    Type: Application
    Filed: September 23, 2021
    Publication date: July 28, 2022
    Inventors: Byungsuk Woo, Changkyu Seol, Cheolmin Park, Sucheol Lee, Chanik Park
  • Patent number: 11370864
    Abstract: Disclosed is a graft copolymer containing a polyfluorene-based polymer as a main chain and a polyvinylidene fluoride (PVDF) as a side chain, and an element including the same. The graft copolymer contains both the polyfluorene-based polymer and the PVDF, so that the graft copolymer may increase miscibility between polymers to prepare a composite having excellent performance, prepare an uniform thin film through a solution process, and be used as a single material that exhibits both piezoelectric properties and luminescence properties.
    Type: Grant
    Filed: November 30, 2020
    Date of Patent: June 28, 2022
    Assignee: Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Jinkyun Lee, Sejin Lee, Jiyeon Kim, Cheolmin Park, Euihyuk Kim, Joona Bang
  • Publication number: 20220060358
    Abstract: A receiver, which is compatible with a mobile industry processor interface (MIPI) C-PHY physical layer, includes a plurality of variable-gain amplifiers responsive to respective multi-level signals (e.g., 3-level signals), and a plurality of filters having variable cutoff frequencies. The plurality of filters are responsive to respective signals generated by the plurality of amplifiers. An array of comparators is provided, which is responsive to signals generated by the plurality of filters. A jitter detection circuit is provided, which is configured to set respective gains of the plurality of variable-gain amplifiers and respective cutoff frequencies of the plurality of filters (e.g., high-pass filters), in response to signals generated by the array of comparators.
    Type: Application
    Filed: July 6, 2021
    Publication date: February 24, 2022
    Inventors: Seongkwan Lee, Minho Kang, Cheolmin Park
  • Publication number: 20220049157
    Abstract: A synchronized piezoelectric and luminescence (SPL) material includes a core layer including light-emitting particles and a shell layer which is attached onto a surface of the core layer and includes ligands having a piezoelectric property. Therefore, a piezoelectric property and a luminescent property can be simultaneously implemented using a single SPL material in which piezoelectric ligands and light-emitting particles are chemically coupled.
    Type: Application
    Filed: November 30, 2020
    Publication date: February 17, 2022
    Applicant: UIF (University Industry Foundation), Yonsei University
    Inventors: Cheolmin PARK, Seokyeong LEE, Joona BANG, Jaewan KO, Taewoo LEE, Sungjin KIM
  • Publication number: 20220025095
    Abstract: Disclosed is a graft copolymer containing a polyfluorene-based polymer as a main chain and a polyvinylidene fluoride (PVDF) as a side chain, and an element including the same. The graft copolymer contains both the polyfluorene-based polymer and the PVDF, so that the graft copolymer may increase miscibility between polymers to prepare a composite having excellent performance, prepare an uniform thin film through a solution process, and be used as a single material that exhibits both piezoelectric properties and luminescence properties.
    Type: Application
    Filed: November 30, 2020
    Publication date: January 27, 2022
    Applicant: Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Jinkyun LEE, Sejin LEE, Jiyeon KIM, Cheolmin PARK, Euihyuk KIM, Joona BANG
  • Publication number: 20210159439
    Abstract: A light-emitting device according to the present invention comprises, an electrode unit including a first electrode and a second electrode spaced apart from each other, with electrical signals having different polarity applying the first and second electrode, respectively; a first stimulation unit disposed on one surface of the electrode unit and having a first stimulation reaction layer expressing variable luminance according to a first stimulation; and a second stimulation unit disposed on the other surface facing the one surface of the electrode unit, and having a second stimulation reaction layer expressing a variable luminance according to a second stimulation different from the first stimulation.
    Type: Application
    Filed: November 25, 2020
    Publication date: May 27, 2021
    Inventors: Cheolmin Park, Woo Kyoung Jin, Eui Hyuk Kim
  • Publication number: 20210119930
    Abstract: Examples described herein relate to technologies for reliable packet transmission. In some examples, a network interface includes circuitry to: receive a request to transmit a packet to a destination device, select a path for the packet, provide a path identifier identifying one of multiple paths from the network interface to a destination and Path Sequence Number (PSN) for the packet, wherein the PSN is to identify a packet transmission order over the selected path, include the PSN in the packet, and transmit the packet. In some examples, if the packet is a re-transmit of a previously transmitted packet, the circuitry is to: select a path for the re-transmit packet, and set a PSN of the re-transmit packet that is a current packet transmission number for the selected path for the re-transmit packet.
    Type: Application
    Filed: October 29, 2020
    Publication date: April 22, 2021
    Inventors: Mark DEBBAGE, Robert SOUTHWORTH, Arvind SRINIVASAN, Cheolmin PARK, Todd RIMMER, Brian S. HAUSAUER
  • Publication number: 20210093232
    Abstract: The present invention relates to a liquid information sensor comprises at least more than one electrode set including a first electrode, and a second electrode which is disposed spaced apart from the first electrode and to which an alternating current signal is applied between the first electrode and the second electrode; and a ferroelectric layer including a first side in contact with the first electrode and the second electrode and a second side facing the first side and defining a receiving area for receiving the target liquid, and generating sound waves by physical vibration when the AC signal is applied.
    Type: Application
    Filed: December 4, 2019
    Publication date: April 1, 2021
    Inventors: Cheolmin Park, Jong Sung Kim, Eui Hyuk Kim, Chanho Park
  • Publication number: 20210088815
    Abstract: Disclosed are a light emission device including a magnetoactive element, a method of fabricating the same, and an electronic device including the light emission device. The disclosed light emission device may include a light emission layer; a first electrode and a second electrode spaced apart from each other on a first surface side of the light emission layer; and a magnetoactive fluid layer disposed on a second surface side of the light emission layer and having a plurality of nanostructures of which arrangement and distribution is configured to change according to application of a magnetic field. The light emitting properties of the light emission layer may be changed according to the arrangement and distribution of a plurality of nanostructures in the magnetoactive fluid layer. The plurality of nanostructures may include conductive nanowire and magnetic nanoparticle provided on the surfaces of the conductive nanowire.
    Type: Application
    Filed: September 24, 2020
    Publication date: March 25, 2021
    Applicant: UNIVERSITY-INDUSTRY FOUNDATION(UIF), YONSEI UNIVERSITY
    Inventors: Cheolmin PARK, Soyeon BAEK, Seung Won LEE