Patents by Inventor Joo-Sung Lee

Joo-Sung Lee 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: 20210096602
    Abstract: An electronic device is disclosed herein, including a first face oriented in a first direction, the first face formed having a curvature and disposed as to be visible from an exterior of the electronic device, a body including a second face oriented towards a second direction opposite to the first direction, the second face visible from the exterior, and a display module visible when viewing the first face, the display module including a flexible display disposed under a window, and the window including a central visible area formed in a substantially rectangular shape including first, second, third and fourth visible areas disposed adjacent to four respective edges of the central visible area.
    Type: Application
    Filed: December 11, 2020
    Publication date: April 1, 2021
    Inventors: Dong Hun KIM, Jung Sik PARK, Min Sung LEE, Chung Ha KIM, Joo Ho SEO, Han Gil SONG, Seung Ah OH, So Young LEE, Jung Won LEE, Jong Chul CHOI
  • Publication number: 20210094055
    Abstract: The inventive concept relates to an apparatus for treating a substrate. The apparatus includes a substrate support unit that supports the substrate, a nozzle unit that dispenses a treatment liquid onto the substrate supported on the substrate support unit, and a liquid supply unit that supplies the treatment liquid to the nozzle unit. The liquid supply unit includes a main supply line that is connected to the nozzle unit and that supplies the treatment liquid to the nozzle unit, wherein the treatment liquid is prepared by mixing a chemical with DIW at a first temperature and DIW at a second temperature higher than the first temperature, and temperature of the treatment liquid is adjusted by regulating a flow rate of the DIW at the first temperature and a flow rate of the DIW at the second temperature.
    Type: Application
    Filed: September 22, 2020
    Publication date: April 1, 2021
    Applicant: SEMES CO., LTD.
    Inventors: Kang Suk LEE, Joo Sung LEE, Soon Kab KWON
  • Patent number: 10964846
    Abstract: A semiconductor light emitting device includes a first semiconductor layer of a first conductivity type on a substrate, an active layer on the first semiconductor layer, a second semiconductor layer of a second conductivity type on the active layer, the second semiconductor layer being doped with magnesium (Mg), and having an upper surface substantially parallel to an upper surface of the substrate and a side surface inclined with respect to the upper surface of the substrate, and a third semiconductor layer of the second conductivity type on the second semiconductor layer, the third semiconductor layer being doped with magnesium (Mg) at a concentration different from that of the second semiconductor layer, and having an upper surface substantially parallel to the upper surface of the substrate and a side surface inclined with respect to the upper surface of the substrate.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: March 30, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-Gun Lee, Joo-Sung Kim, Jong-Uk Seo, Young-Jo Tak
  • Publication number: 20210057705
    Abstract: A separator having low resistance, suitable porosity and electrolyte retention while ensuring heat resistance is provided. The separator includes a porous substrate and a low-resistance coating layer formed on at least one surface of the porous substrate, wherein the low-resistance coating layer includes node(s) containing inorganic particles and a polymer resin covering at least a part of the surfaces of inorganic particles, and filament(s) formed from the polymer resin of the node in a thread-like shape, at least one filament extended from one node is formed, and the filaments are arranged in such a manner that they connect one node with another node.
    Type: Application
    Filed: July 15, 2019
    Publication date: February 25, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, A-Young Lee
  • Publication number: 20210036286
    Abstract: Provided is a separator for an electrochemical device, including: a porous polymer substrate; and a porous organic/inorganic coating layer formed on at least one surface of the porous polymer substrate and including heat conductive inorganic particles and core-shell particles, wherein the particles are bound to one another by a binder polymer, and wherein the core-shell particle includes a core portion and a shell portion surrounding the surface of the core portion, the core portion includes a metal hydroxide having heat-absorbing property at 150-400° C., the shell portion includes a polymer resin, and the polymer resin is a water-insoluble polymer or crosslinked polymer. An electrochemical device including the separator is also provided. It is possible to provide a separator with an improved heat-absorbing effect and safety, and an electrochemical device including the same.
    Type: Application
    Filed: June 21, 2019
    Publication date: February 4, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, A-Young Lee, Sun-Mi Jin
  • Patent number: 10910620
    Abstract: A preparation method of a separator according to the present disclosure includes preparing an aqueous slurry including inorganic particles, a binder polymer, and an aqueous medium, and coating the aqueous slurry on at least one surface of a porous polymer substrate to form an organic-inorganic composite porous coating layer, wherein capillary number of the aqueous slurry has a range between 0.3 and 65.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: February 2, 2021
    Assignees: LG CHEM, LTD., TORAY INDUSTRIES, INC.
    Inventors: Joo-Sung Lee, Sun-Mi Jin
  • Patent number: 10908222
    Abstract: Provided is a battery lifetime estimating method including steps of: fully charging a battery according to a predetermined charging condition; partially discharging the fully charged battery according to a predetermined discharging condition; acquiring voltage information at a plurality of predetermined measurement time points while performing the partially discharging; and estimating a remaining capacity of the battery by using the acquired voltage information. Herein, the step of estimating the remaining capacity of the battery includes steps of: calculating the capacity of the battery in one cycle of fully charging/discharging in which the measurement is performed from the measured voltage drop amounts; and estimating the remaining lifetime of the battery by applying a statistical technique to the capacity of the battery calculated with respect to a plurality of cycles of fully charging/discharging.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: February 2, 2021
    Assignee: HYOSUNG HEAVY INDUSTRIES CORPORATION
    Inventors: Sang Hui Park, Hwa Seob Song, Ji Sung Kim, Joo Ho Choi, Jae Wook Lee
  • Publication number: 20210017351
    Abstract: A method for manufacturing a crosslinked polyolefin separator and the crosslinked polyolefin separator obtained therefrom are provided. The method includes non-grafted polyolefin having a weight average molecular weight of 300,000 or more and silane-grafted polyolefin having a weight average molecular weight of 300,000 or more. The method minimizes gel formation, a side reaction occurring in an extruder during the manufacture of a-the separator, and provides a-the separator having a uniform surface.
    Type: Application
    Filed: August 30, 2019
    Publication date: January 21, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, Won-Sik Bae, Bi-Oh Ryu
  • Publication number: 20210020887
    Abstract: A separator for an electrochemical device, including a porous substrate and an inorganic coating layer formed on at least one surface of the porous substrate and method for manufacturing the same are provided. The inorganic coating layer includes a binder resin and inorganic particles, and the binder resin includes a polyvinylidene fluoride-based resin and shows a low electrolyte absorption ratio. The separator has excellent adhesion with an electrode and shows low resistance characteristics.
    Type: Application
    Filed: June 12, 2019
    Publication date: January 21, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, A-Young Lee
  • Publication number: 20200411826
    Abstract: A lithium secondary battery is disclosed herein. In some embodiments, a lithium secondary battery comprises a positive electrode, a negative electrode and a separator interposed between the positive electrode and the negative electrode, wherein the separator includes a crosslinked polyolefin porous membrane having a shutdown temperature of 125 to 145° C., a difference between the shutdown temperature and a meltdown temperature ranging between 20 and 80° C., and a meltdown temperature that is higher by 5 to 35° C. than a self-heating temperature of the positive electrode. The lithium secondary battery according to the present disclosure has improvements in both safety and processing.
    Type: Application
    Filed: June 5, 2019
    Publication date: December 31, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, Heon-Sik Song, Won-Sik Bae, Bi-Oh Ryu
  • Patent number: 10877520
    Abstract: An electronic device is disclosed herein, including a first face oriented in a first direction, the first face formed having a curvature and disposed as to be visible from an exterior of the electronic device, a body including a second face oriented towards a second direction opposite to the first direction, the second face visible from the exterior, and a display module visible when viewing the first face, the display module including a flexible display disposed under a window, and the window including a central visible area formed in a substantially rectangular shape including first, second, third and fourth visible areas disposed adjacent to four respective edges of the central visible area.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: December 29, 2020
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Dong Hun Kim, Jung Sik Park, Min Sung Lee, Chung Ha Kim, Joo Ho Seo, Han Gil Song, Seung Ah Oh, So Young Lee, Jung Won Lee, Jong Chul Choi
  • Publication number: 20200381688
    Abstract: Provided are a negative electrode for a lithium secondary battery having reinforced insulating properties, which comprises a negative electrode active material layer; and a ceramic separating layer formed on the negative electrode active material layer, wherein the negative electrode active material layer has an arithmetic average surface roughness (Ra) of 0.01 ?m to 0.3 ?m, and the ceramic separating layer has a thickness of 1 ?m to 30 ?m, and a lithium secondary battery comprising the same.
    Type: Application
    Filed: September 14, 2018
    Publication date: December 3, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Jun Hyuk Song, Joo Sung Lee, Eun Kyung Kim
  • Publication number: 20200381702
    Abstract: The present invention relates to a secondary battery capacity recovery method and apparatus for recovering the capacity of a secondary battery with deteriorated lifespan characteristics. The secondary battery capacity recovery method of the present invention comprises: (1) preparing a secondary battery with deteriorated lifespan characteristics; (2) heating the secondary battery with deteriorated lifespan characteristics while pressing the secondary battery with deteriorated lifespan characteristics to compress a positive electrode, negative electrode, or separator included in the secondary battery; and (3) charging/discharging the secondary battery with deteriorated lifespan characteristics, the secondary battery having been pressed and heated, and the secondary battery with deteriorated lifespan characteristics may be charged and discharged while being pressed and heated, thereby exhibiting an effect of recovering the capacity of the secondary battery with deteriorated lifespan characteristics.
    Type: Application
    Filed: February 18, 2019
    Publication date: December 3, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Jun Hyuk SONG, Je Young KIM, Joo Sung LEE, Suk In NOH, Hee Won LEE
  • Publication number: 20200365860
    Abstract: The present disclosure relates to a A method for manufacturing a crosslinked polyolefin separator and the crosslinked polyolefin separator obtained by the method are provided. The method includes (S1) mixing polyolefin, a diluting agent, an initiator and alkoxysilane containing a carbon-carbon double bonded group to an extruder, and then carrying out extrusion to obtain a silane-grafted polyolefin composition; (S2) molding and orienting the extruded silane-grafted polyolefin composition in the form of a sheet; (S3) introducing the oriented sheet to an extraction water bath containing a crosslinking catalyst to extract the diluting agent and perform aqueous crosslinking; and (S4) thermally fixing a resultant aqueous crosslinked product. The method can provide a separator having a high meltdown temperature and improved heat shrinkage.
    Type: Application
    Filed: September 3, 2019
    Publication date: November 19, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Bi-Oh Ryu, Won-Sik Bae, Joo-Sung Lee, A-Young Lee
  • Publication number: 20200362094
    Abstract: Disclosed are solvent-linked porous covalent organic polymers (COPs) and a method of preparing the same, and more particularly porous covalent organic polymers that are linked by a solvent and are thus suitable for the transportation and storage of natural gas, and a method of preparing the porous covalent organic polymers by conducting alkylation polymerization between an aromatic monomer and a chlorine-based solvent in the presence of a Lewis acid catalyst. Porous stretchable covalent organic polymers having pores with various sizes can be synthesized simply and quickly at room temperature and atmospheric pressure without a heating or purification step, and the covalent organic polymers have very high natural gas storage capacity due to the flexible porous network structure thereof and thus are suitable for storage and transportation of natural gas and useful as a natural gas adsorbent.
    Type: Application
    Filed: March 4, 2020
    Publication date: November 19, 2020
    Inventors: Cafer T. Yavuz, Vepa Rozyyev, Joo Sung Lee
  • Patent number: 10797287
    Abstract: The present disclosure provides an organic/inorganic composite porous membrane, comprising: one or more particles selected from inorganic particles and organic particles; and a binder polymer, wherein said one or more particles selected from inorganic particles and organic particles are bonded with each other by the binder polymer surrounding the surface of the particles, and said one or more particles are filled at a rate of 60 to 70% in the membrane.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: October 6, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Sun-Mi Jin, Hyung-Kyun Yu, Joo-Sung Lee
  • Publication number: 20200303593
    Abstract: A semiconductor light emitting device includes a first conductivity-type semiconductor layer; an active layer covering a portion of the first conductivity-type semiconductor layer; and a second conductivity-type semiconductor layer covering a portion of the active layer, and sidewalls of the second conductivity-type semiconductor layer are spaced apart from sidewalls of the active layer along a horizontal direction.
    Type: Application
    Filed: September 16, 2019
    Publication date: September 24, 2020
    Inventors: Young Jo TAK, Joo Sung KIM, Jong Uk SEO, Dong Gun LEE, Yong Il KIM
  • Patent number: 10763492
    Abstract: The present disclosure relates to an integrated electrode assembly, wherein a positive electrode, a first binder polymer layer, an inorganic coating layer comprising a plurality of inorganic layers and a second binder polymer, a third binder polymer layer, and a negative electrode are sequentially stacked and combined, each configurative element forming the electrode assembly is stacked and combined with excellent adhesion, and the durability of the inorganic coating layer preventing the internal short circuit of the electrode is excellent, and thus a lithium secondary battery using the integrated electrode assembly according to the present disclosure may have excellent cycle characteristics.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: September 1, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, Sun-Mi Jin
  • Patent number: 10756319
    Abstract: Disclosed is a method for manufacturing a separator for an electrochemical device. The method contributes to formation of a separator with good bondability to electrodes and prevents inorganic particles from detaching during an assembling process of an electrochemical device.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: August 25, 2020
    Assignees: LG Chem, Ltd., TORAY INDUSTRIES, INC.
    Inventors: Joo-Sung Lee, Jang-Hyuk Hong, Jong-Hun Kim
  • Publication number: 20200266411
    Abstract: A method for manufacturing a crosslinked polyolefin separator, including the steps of: (S1) introducing polyolefin having a weight average molecular weight of 200,000-1,000,000, a first diluting agent, alkoxysilane containing a carbon-carbon double bonded group, an initiator and a crosslinking catalyst to an extruder; (S2) introducing a second diluting agent to the extruder, followed by mixing, to carry out reactive extrusion of a silane-grafted polyolefin composition; (S3) molding and orienting the reactive extruded silane-grafted polyolefin composition in a form of a sheet; (S4) extracting the first diluting agent and the second diluting agent from the oriented sheet to obtain a silane-grafted polyolefin porous membrane; (S5) thermally fixing the porous membrane; and (S6) crosslinking the porous membrane in the presence of water and a crosslinked polyolefin separator are provided.
    Type: Application
    Filed: June 11, 2019
    Publication date: August 20, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Joo-Sung Lee, Won-Sik Bae, Bi-Oh Ryu, Heon-Sik Song