Patents by Inventor Sung Hyun Nam

Sung Hyun Nam 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: 10105919
    Abstract: The present invention relates to a method for manufacturing a thin polarizer, the method including: a step of preparing an unstretched polyvinyl alcohol-based film having a thickness of 20 ?m or less, in which a strength applied to stretch the film by 6 times is 4 N or more; and a single stretching step of forming a stretched polyvinyl alcohol-based film having a thickness of 10 ?m or less by stretching the unstretched polyvinyl alcohol-based film solely, and a thin polarizer manufactured by using the same.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: October 23, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Sung Hyun Nam, Jonghyun Jung, Kyun Il Rah, Hye Min Yu
  • Patent number: 10101513
    Abstract: The present invention relates to a method for manufacturing a thin polarizer, the method comprising the steps of: forming an auxiliary support on both ends in the transverse direction (TD) of an unstretched polyvinyl alcohol-based film; and wet-stretching the polyvinyl alcohol-based film, which has the auxiliary support formed thereon, in the machine direction (MD) of the polyvinyl alcohol-based film, in such that the thickness of the polyvinyl alcohol-based film is 10 ?m or less.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: October 16, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Jonghyun Jung, Sung Hyun Nam, Kyun II Rah, Hye Min Yu
  • Patent number: 10081141
    Abstract: The present invention relates to a polarizing plate that comprises a polyvinyl alcohol-based polarizer dyed with any one or more of iodine and a dichroic dye and that locally has a depolarized region having a single transmittance of 70% or more at a wavelength ranging from 400 nm to 800 nm, the depolarized region being formed by irradiating light having a specific wavelength selected from a wavelength range of 200 nm to 800 nm, and to a manufacturing method thereof.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: September 25, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Byung Sun Lee, Sung Hyun Nam, Kyun Il Rah
  • Patent number: 10081143
    Abstract: There is provided a stretched laminate having superior optical characteristics, easily separable from a base film, and usable for manufacturing a thin polarizer. In addition, there are provided a method of manufacturing a thin polarizer having superior optical characteristics by using the stretched laminate, a thin polarizer manufactured by the method, and a polarizing plate including the thin polarizer.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: September 25, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Sung-Hyun Nam, Jong-Hyun Jung, Kyun-II Rah, Hye-Min Yu
  • Patent number: 10054726
    Abstract: Provided are a polarizing plate and a liquid crystal display device. The polarizing plate, which is lightweight and has a thin thickness and excellent physical properties including durability, water resistance, workability, pressure-sensitive adhesion and a light leakage prevention effect; and the liquid crystal display device including the same are provided.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: August 21, 2018
    Assignee: LG Chem, Ltd.
    Inventors: In Kyu Park, Ki Ok Kwon, No Ma Kim, In Ho Hwang, Sung Hyun Nam, Sung Soo Yoon, Kyun Il Rah, Min Ki Lee
  • Patent number: 10048417
    Abstract: There is provided a method of manufacturing a thin polarizing plate including: forming a film laminate by attaching a non-stretched polyvinyl alcohol (PVA)-based film to a non-stretched base film, using attractive force therebetween or using an adhesive; stretching the film laminate; attaching a first protective film to the PVA-based film of the stretched film laminate; and separating the PVA-based film having the first protective film attached thereto from the base film.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: August 14, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Sung-Hyun Nam, Kyun-Il Rah, Jong-Hyun Jung, Hye-Min Yu
  • Publication number: 20180194121
    Abstract: The present application relates to a method for preparing a base film, a laminate or a polarizing film. The present application can provide an elongatable base film which simultaneously maintains elongation and recovery rates at proper levels and guarantees water resistance, and thus can be effectively applied in the preparation of, for example, a polarizing film. The present application can also provide a laminate using the film or a method for preparing a polarizing film using the base film. The base film can be effectively applied in the preparation of a polarizing film having an excellent function, such as polarization performance, while having a thickness of, for example, about 10 ?m or less, about 8 ?m or less, about 7 ?m or less, about 6 ?m or less, or about 5 ?m or less.
    Type: Application
    Filed: July 1, 2016
    Publication date: July 12, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Se Woo Yang, Sung Hyun Nam, Kyun Il Rah
  • Patent number: 10018511
    Abstract: An infrared detector may be configured to detect a wide bandwidth of infrared spectrum using a broadband surface plasmon resonator. The infrared detector may include a substrate; a thermistor member disposed spaced from the substrate, the thermistor member having a resistance value that varies according to temperature; a resonator disposed on the thermistor member, the resonator configured to generate surface plasmon resonance; a pair of thermal legs configured to support the thermistor member such that the thermistor member is disposed spaced from the substrate; and a pair of conductive lead wires respectively disposed on the pair of thermal legs. The conductive lead wires may be configured to transmit signals to the substrate from the thermistor member and the resonator. The resonator may have a plurality of resonant frequencies and be configured to generate the surface plasmon resonance in a plurality of resonant modes.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: July 10, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seok-Ho Yun, Sung-hyun Nam, Sook-Young Roh, Hae-seok Park, Hyun-Gue Hong
  • Patent number: 9915766
    Abstract: The present invention relates to a method of manufacturing a thin polarizer, including: forming a film laminate by attaching a polyvinyl alcohol-based film to at least one surface of a polymer film by using attraction force or an adhesive; swelling the film laminate so that a degree of swelling of the polyvinyl alcohol-based film is 0.36 to 0.44; dyeing at least one of iodine and a dichromatic dye on the film laminate; and stretching the film laminate.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: March 13, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Jong-Hyun Jung, Sung-Hyun Nam, Kyun-Il Rah
  • Publication number: 20180017724
    Abstract: The present application relates to a polarizer, a polarizing plate and a display device. The present application can provide a polarizer or a polarizing plate that is applied to various types of display devices, particularly to a display device having a highly reflective liquid crystal panel and that shows excellent characteristics. In addition, the present application can provide a display device including the polarizer or the polarizing plate.
    Type: Application
    Filed: February 1, 2016
    Publication date: January 18, 2018
    Inventors: Sung Hyun NAM, Kyung Ki HONG, Eung Jin JANG, Yeong Rae CHANG, Heon KIM, Kyun ll RAH, Jong Hyun JUNG, Byung Sun LEE, Hong Jun CHOI, Moon Soo PARK, Sun Kug KIM
  • Patent number: 9791608
    Abstract: The present invention relates to a polarizing plate and a liquid crystal display device. In the present invention, the polarizing plate is lightweight and has a small thickness and excellent properties including durability, water resistance, workability, pressure-sensitive adhesion and light leakage prevention ability; and the liquid crystal display device including the same are provided.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: October 17, 2017
    Assignee: LG Chem, Ltd.
    Inventors: In Ho Hwang, Ki Ok Kwon, No Ma Kim, Sung Hyun Nam, In Kyu Park, Sung Soo Yoon, Kyun Il Rah, Min Ki Lee
  • Patent number: 9696473
    Abstract: The present invention relates to a laminate including an unstretched polymer film; and an unstretched polyvinyl alcohol-based film attached to at least one surface of the polymer film, and a preparing method for a thin polarizer using the laminate.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: July 4, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Hye Min Yu, Sung Hyun Nam, Kyun Il Rah, Jonghyun Jung
  • Patent number: 9684104
    Abstract: There are provided a thin film polarizer having superior optical properties and a method of manufacturing the same. The thin film polarizer includes: forming a film laminate by attaching a non-stretched polyvinyl alcohol (PVA)-based film to at least one surface of a thermoplastic polyurethane film, using attractive force therebetween or using an adhesive; stretching the film laminate at a temperature of 45° C. to 55° C.; and separating the PVA-based film from the thermoplastic polyurethane film.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: June 20, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Sung-Hyun Nam, Jong-Hyun Jung, Kyun-Il Rah, Hye-Min Yu
  • Publication number: 20170157869
    Abstract: The present invention relates to a method for manufacturing a thin polarizer, the method including: a step of preparing an unstretched polyvinyl alcohol-based film having a thickness of 20 ?m or less, in which a strength applied to stretch the film by 6 times is 4 N or more; and a single stretching step of forming a stretched polyvinyl alcohol-based film having a thickness of 10 ?m or less by stretching the unstretched polyvinyl alcohol-based film solely, and a thin polarizer manufactured by using the same.
    Type: Application
    Filed: September 25, 2015
    Publication date: June 8, 2017
    Inventors: Sung Hyun NAM, Jonghyun JUNG, Kyun Il RAH, Hye Min YU
  • Patent number: 9662865
    Abstract: Provided is a stretched laminate for manufacturing a thin polarizer while increasing the degree of orientation of a polyvinyl alcohol-iodine complex without problems such as breakage. In addition, there are provided a method of manufacturing a thin polarizer having superior optical characteristics by using the stretched laminate, a thin polarizer manufactured by the method, and a polarizing plate including the thin polarizer.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: May 30, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Sung Hyun Nam, Jong-Hyun Jung, Kyun-Ii Rah, Hye-Min Yu, Se-Woo Yang, Yoon-Tae Hwang
  • Publication number: 20170131448
    Abstract: The present invention relates to a method for manufacturing a polarizing plate, the method including: preparing a polarizing plate where a protection film is laminated on one surface of a polyvinyl alcohol-based polarizer dyed with at least one or more of iodine and dichromatic dyes; and forming a depolarization region having single transmittance of 80% or more at a wavelength band in a range of 400 nm to 800 nm by bringing a decoloring solution including 1 to 30 wt % of a decolorant into local contact with the other surface of the polarizer, and a polarizing plate manufactured by using the same.
    Type: Application
    Filed: June 24, 2015
    Publication date: May 11, 2017
    Applicant: LG CHEM, LTD
    Inventors: Byung Sun LEE, Ji Young KIM, Sung Hyun NAM, Kyun Il RAH
  • Patent number: 9645293
    Abstract: A method of manufacturing a thin film polarizer includes forming a film laminate by allowing a non-oriented polyvinyl alcohol-based film to be bonded to and sandwiched between two or more non-oriented polymer films using attractive force or an adhesive layer, orienting the film laminate so that the polyvinyl alcohol-based film has a thickness of 10 ?m or less, and separating the polymer films and the polyvinyl alcohol-based film of the oriented film laminate from each other.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: May 9, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Sung Hyun Nam, Jong-Hyun Jung, Kyun-Il Rah, Hye-Min Yu
  • Patent number: 9643387
    Abstract: Provided is a stretched laminate for manufacturing a thin polarizer while increasing the degree of orientation of a polyvinyl alcohol-iodine complex without problems such as breakage. In addition, there are provided a method of manufacturing a thin polarizer having superior optical characteristics by using the stretched laminate, a thin polarizer manufactured by the method, and a polarizing plate including the thin polarizer.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: May 9, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Sung Hyun Nam, Jong-Hyun Jung, Kyun-Il Rah, Hye-Min Yu, Se-Woo Yang, Yoon-Tae Hwang
  • Patent number: 9612376
    Abstract: Provided are a method for preparing a thin polarizer, including forming a film laminate by bonding a non-stretched polyvinyl alcohol-based film having a thickness of 10 to 60 ?m to at least one surface of a non-stretched base film using an adhesive including an amine-based metal compound crosslinking agent and a polyvinyl alcohol-based resin containing an acetoacetyl group, and stretching the film laminate so as to allow the polyvinyl alcohol-based film to have a thickness of 10 ?m or less, and a thin polarizer manufactured through the same.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: April 4, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Sung-Hyun Nam, Jong-Hyun Jung, Kyun-II Rah, Hye-Min Yu, Ji-Young Kim
  • Patent number: 9581730
    Abstract: There are provided a substrate film, a laminate, and method of manufacturing a polarizing film. The present application provides a substrate film capable of effectively manufacturing a polarizing film having a thickness of about 10 ?m or less, about 8 ?m or less, about 7 ?m or less, about 6 ?m or less, or about 5 ?m or less and having an excellent function such as polarization performance, a laminate, and a method of manufacturing the same. According to the invention, it is possible to prevent tearing, curling, or the like from occurring in the elongation process and manufacture a polarizing film by easily elongating a polarization material such as a PVA-based resin.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: February 28, 2017
    Assignee: LG Chem, Ltd.
    Inventors: Se Woo Yang, Sung Hyun Nam, Kyun Il Rah, Yoon Tae Hwang, Jong Hyun Jung, Hye Min Yu, Ji Young Hwang, Eun Suk Park