Patents by Inventor Kyun-II Rah

Kyun-II Rah 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: 10451916
    Abstract: The present invention relates to a polarizing plate including a water-based adhesive layer, a primer layer, and a polyethylene terephthalate protection film sequentially provided on at least one surface of a polarizer, in which the water-based adhesive layer is formed by using a water-based adhesive including a polyvinyl alcohol-based resin, an amine-based metal compound, and a pH adjuster, and the pH adjuster includes epoxy (meth)acrylate, alcohol, and acid, and a method for manufacturing the same.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: October 22, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Sung Hyun Nam, Seunghee Nam, Kyun II Rah, Dae Woong Lee
  • 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: 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
  • Publication number: 20170254939
    Abstract: The present specification relates to a method for manufacturing a polarizing plate and a polarizing plate manufactured using the same. More specifically, the present specification relates to a method for manufacturing a polarizing plate which locally has a depolarized area and a polarizing plate manufactured using the same.
    Type: Application
    Filed: October 5, 2015
    Publication date: September 7, 2017
    Inventors: Byung Sun LEE, Hyung Koo KANG, Ho Jeong YUN, Eung Jin JANG, Kyun II RAH
  • 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
  • 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
  • Publication number: 20170031073
    Abstract: The present invention relates to a polarizing plate including a water-based adhesive layer, a primer layer, and a polyethylene terephthalate protection film sequentially provided on at least one surface of a polarizer, in which the water-based adhesive layer is formed by using a water-based adhesive including a polyvinyl alcohol-based resin, an amine-based metal compound, and a pH adjuster, and the pH adjuster includes epoxy (meth)acrylate, alcohol, and acid, and a method for manufacturing the same.
    Type: Application
    Filed: May 22, 2015
    Publication date: February 2, 2017
    Inventors: Sung Hyun NAM, Seunghee NAM, Kyun II RAH, Dae Woong LEE
  • Patent number: 9487685
    Abstract: The present invention relates to an adhesive composition including 100 parts by weight of a first epoxy compound having a glass transition temperature of a homopolymer of not less than 120° C., 30 parts by weight to 100 parts by weight of a second epoxy compound having a glass transition temperature of a homopolymer of not more than 60° C., and 0.5 parts by weight to 20 parts by weight of a cationic photopolymerization initiator, and a polarizing plate using the same.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: November 8, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Eun-Mi Seo, Eun-Soo Huh, Nam-Jeong Lee, Hwa-Sub Shim, Kyun-II Rah, Jun-Wuk Park, Jee-Hyon Min, Yi-Rang Lim
  • Publication number: 20160299272
    Abstract: The present invention relates to a method for manufacturing a polarizer including preparing a polyvinyl alcohol-based polarizer dyed with at least one of iodine and dichroic dye; forming a depolarized area by locally bringing a bleaching solution into contact with some areas of the polarizer; and acid treating at least the depolarized area using an acid solution, a polarizer and a polarizing plate manufactured by using the same.
    Type: Application
    Filed: March 23, 2015
    Publication date: October 13, 2016
    Inventors: Byung Sun LEE, Sung Hyun NAM, Kyun II RAH
  • Publication number: 20160243774
    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: Application
    Filed: June 16, 2014
    Publication date: August 25, 2016
    Inventors: Sung-Hyun NAM, Jong-Hyun JUNG, Kyun-II RAH, Hye-Min YU
  • Publication number: 20160231485
    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: Application
    Filed: September 23, 2014
    Publication date: August 11, 2016
    Inventors: Jonghyun JUNG, Sung Hyun NAM, Kyun II RAH, Hye Min YU
  • Publication number: 20160216422
    Abstract: The present specification relates to a method for manufacturing a polarizer and a polarizer manufactured by using the same, and more particularly, to a method for manufacturing a polarizer, which includes a cross-linking and elongating step using an aqueous solution including a polyvalent carboxylic acid compound and a boric acid compound, and a polarizer manufactured by using the same.
    Type: Application
    Filed: January 26, 2016
    Publication date: July 28, 2016
    Inventors: Ji Young KIM, Ji Young KIM, Hye Min YU, Kyun II RAH, Jin Yong PARK, Eungki LEE, Taek Geun NAM
  • Publication number: 20160195653
    Abstract: The present invention relates to a method of manufacturing a polarizer, including: preparing a polyvinyl alcohol-based polarizer dyed with one or more of iodine and dichromatic dyes; and forming a depolarization region having simple substance transmittance of 80% or more in a wavelength band of 400 nm to 800 nm by bringing a decoloring solution including 1 wt % to 30 wt % of a decolorant into local contact with some regions of the polarizer, and a polarizer manufactured using the same.
    Type: Application
    Filed: September 26, 2014
    Publication date: July 7, 2016
    Inventors: Byung Sun LEE, Sung Hyun NAM, Kyun II RAH
  • Publication number: 20160195767
    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: Application
    Filed: September 26, 2014
    Publication date: July 7, 2016
    Inventors: Byung-Sun LEE, Sung Hyun NAM, Kyun II RAH
  • Publication number: 20140204460
    Abstract: Provided are a high luminance polarizing plate including a polarizing plate, a ?/2 retardation film having an in-plane retardation value ranging from 250 nm to 280 nm in a wavelength range of 450 nm to 650 nm that is laminated on one side of the polarizing plate, and a brightness enhancement film laminated on the ?/2 retardation film, a method of manufacturing the same, and a display device using the high luminance polarizing plate.
    Type: Application
    Filed: May 29, 2013
    Publication date: July 24, 2014
    Inventors: Sung-Hyun NAM, Kyun-II RAH
  • Publication number: 20140160405
    Abstract: Provided are a polarizing plate and a liquid crystal display device. The polarizing plate has lighter weight, a smaller thickness, and excellent physical properties such as water resistance, workability, durability, and light leakage preventing ability. In addition, the polarizing plate prevents curling occurring at the polarizing plate or a polarizer in formation thereof, and has excellent thermal resistance or thermal shock resistance.
    Type: Application
    Filed: February 14, 2014
    Publication date: June 12, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Eun Soo Huh, Ki Ok Kwon, In Ho Hwang, Kyun II Rah, Min Ki Lee, Sae Han Cho
  • Publication number: 20140106149
    Abstract: A double-sided polarizer includes a polarizing film, a first adhesive layer formed on one surface of the polarizing film, a second adhesive layer formed on the other surface of the polarizing film, a first transparent film formed on the first adhesive layer, and a second transparent film formed on the second adhesive layer, wherein the first adhesive layer and the second adhesive layer are formed of an active energy line-curable adhesive and the first adhesive layer is 0.1 ?m to 3 ?m thick, and there is also provided an optical device including the double-sided polarizer.
    Type: Application
    Filed: October 12, 2012
    Publication date: April 17, 2014
    Applicant: LG CHEM, LTC.
    Inventors: Eun-Mi Seo, Hwa-Sub Shim, Jee-Hyon Min, Nam-Jeong Lee, Kyun-II Rah, Jun-Wuk Park, Eun-Soo Huh, Yi-Rang Lim
  • Publication number: 20140072731
    Abstract: The present invention relates to an adhesive composition including 100 parts by weight of a first epoxy compound having a glass transition temperature of a homopolymer of not less than 120° C., 30 parts by weight to 100 parts by weight of a second epoxy compound having a glass transition temperature of a homopolymer of not more than 60° C., and 0.5 parts by weight to 20 parts by weight of a cationic photopolymerization initiator, and a polarizing plate using the same.
    Type: Application
    Filed: October 12, 2012
    Publication date: March 13, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Eun-Mi Seo, Eun-Soo Huh, Nam-Jeong Lee, Hwa-Sub Shim, Kyun-II Rah, Jun-Wuk Park, Jee-Hyon Min, Yi-Rang Lim
  • Publication number: 20130250196
    Abstract: An optical element and a stereoscopic image display device are provided. The optical element is a light-dividing element, for example an element that can divide incident light into at least two kinds of light having different polarized states. Therefore, the optical element can be used to realize a stereoscopic image.
    Type: Application
    Filed: May 9, 2013
    Publication date: September 26, 2013
    Applicant: LG Chem, Ltd
    Inventors: Eun MI SEO, Sin Young KIM, Kyun II RAH, Moon Soo PARK, Seung Hun CHAE
  • Publication number: 20130242213
    Abstract: An optical element and a stereoscopic image display device are provided. The optical element is a light-dividing element, for example an element that can divide incident light into at least two kinds of light having different polarized states. Therefore, the optical element can be used to realize a stereoscopic image.
    Type: Application
    Filed: May 8, 2013
    Publication date: September 19, 2013
    Applicant: LG CHEM, LTD.
    Inventors: Eun Mi Seo, Sin Young Kim, Kyun II Rah, Moon Soo Park, Seung Hun Chae