Patents by Inventor Kyun-Il Rah

Kyun-Il 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).

  • Publication number: 20160298004
    Abstract: The present invention relates to an adhesive for a polarizing plate including a polyvinyl alcohol-based resin, a titanium lactate ammonium salt, hydroxycarboxylic acid and water, and having a pH of 3.5 to 6.5, thereby having improved adhesive strength and water resistance, and a polarizing plate and an image display device including the same.
    Type: Application
    Filed: September 30, 2014
    Publication date: October 13, 2016
    Inventors: Ji-Young KIM, Ji-Young KIM, Kyun-Il RAH
  • Publication number: 20160266291
    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: Application
    Filed: October 21, 2014
    Publication date: September 15, 2016
    Inventors: Hye Min YU, Sung Hyun NAM, Kyun Il RAH, Jonghyun JUNG
  • Publication number: 20160229135
    Abstract: The present invention relates to a method for manufacturing a polarizing plate, the method comprising the sequential steps of: preparing a polarizing element comprising a polyvinyl alcohol-based polarizer dyed with any one or more of iodine and a dichroic dye; irradiating the polarizing element with light having a specific wavelength selected from a wavelength range of 200 nm to 800 nm; and moistening the polarizing element, and to a polarizing plate manufactured by the method.
    Type: Application
    Filed: September 26, 2014
    Publication date: August 11, 2016
    Inventors: Byung Sun LEE, Sung Hyun NAM, Kyun Il RAH
  • Patent number: 9405049
    Abstract: The present invention relates to a polarizing plate and a liquid crystal display device. The polarizing plate, which is lightweight and has a small 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 may be provided.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: August 2, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Sung Soo Yoon, Ki Ok Kwon, No Ma Kim, In Ho Hwang, Sung Hyun Nam, In Kyu Park, Kyun Il Rah, Min Ki Lee
  • Publication number: 20160195641
    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: Application
    Filed: June 19, 2014
    Publication date: July 7, 2016
    Applicant: 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
  • Publication number: 20160130483
    Abstract: Provided are a modified polyvinyl alcohol-based resin with an acrylic group introduced thereto and including a hydroxyl group formed during the introduction of the acrylic group, an adhesive including the modified polyvinyl alcohol-based resin having excellent adhesion, humidity resistance, and water resistance, an adhesive including a polyvinyl alcohol-based resin, and a compound having an epoxy group, and an acrylic group, a polarizing plate and an image display device including the adhesive. The adhesive for a polarizing plate according to an embodiment of the present invention has excellent adhesion, humidity resistance, and water resistance as well as having excellent solubility with respect to water and an increase in adhesion while physical properties of a typical polyvinyl alcohol-based resin are maintained.
    Type: Application
    Filed: January 13, 2016
    Publication date: May 12, 2016
    Inventors: Seong-Jun Park, Ki-Ok Kwon, Kyun-Il Rah
  • Publication number: 20160103260
    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: Application
    Filed: June 12, 2014
    Publication date: April 14, 2016
    Inventors: Sung-Hyun NAM, Jong-Hyun JUNG, Kyun-Il RAH, Hye-Min YU
  • Publication number: 20160103259
    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: Application
    Filed: June 13, 2014
    Publication date: April 14, 2016
    Inventors: Sung Hyun NAM, Jong-Hyun JUNG, Kyun-Il RAH, Hye-Min YU
  • Patent number: 9304239
    Abstract: The present disclosure relates to a method for preparing a thin polarizer, and a thin polarizer prepared using the same, the method including forming a film laminate by attaching a non-stretched polyvinyl alcohol (PVA) film having a thickness of 10 to 60 ?m to at least one surface of a non-stretched base film, using attractive force therebetween; and stretching the film laminate such that the thickness of the PVA film is 10 ?m or less.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: April 5, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Sung-Hyun Nam, Jun-Geun Um, Kyun-Il Rah, Jong-Hyun Jung, Hye-Min Yu, Nam-Jeong Lee, Sei-Jung Park
  • Patent number: 9304238
    Abstract: A polarizing plate, a fabrication method thereof, and a display device using the same are provided. The polarizing plate includes a polarizing element, a first adhesive layer formed on one surface of the polarizing element, a second adhesive layer formed on the other surface of the polarizing element, a protective film attached to an upper portion of the first adhesive layer, a bonding layer attached to a lower portion of the second adhesive layer, and a luminance enhancement film attached to the bonding layer.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: April 5, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Sung-Hyun Nam, Ki-Ok Kwon, Kyun-Il Rah
  • Publication number: 20160084990
    Abstract: There is provided a stretched laminate formed by stretching a laminate including: a non-stretched high-density polyethylene film; and a non-stretched polyvinyl alcohol-based film attached to at least one surface of the high-density polyethylene film, wherein the polyvinyl alcohol-based film has a thickness of 10 ?m or less after stretching. In addition, there are provided a method of manufacturing a thin polarizer using the stretched laminate, a thin polarizer manufacturing by the method, and a polarizing plate including the thin polarizer.
    Type: Application
    Filed: June 16, 2014
    Publication date: March 24, 2016
    Inventors: Sung Hyun NAM, Jong-Hyun JUNG, Kyun-Il RAH, Hye-Min YU
  • Publication number: 20160084993
    Abstract: There is provided a method for preparing a polarizer including preparing a polyvinyl alcohol-based film exhausted with iodine or dichroic dye and then elongated, and adjusting the color of a polarizer by irradiating polarized ultraviolet light onto the elongated polyvinyl alcohol-based film.
    Type: Application
    Filed: June 12, 2014
    Publication date: March 24, 2016
    Inventors: Jong-Hyun JUNG, Sung-Hyun NAM, Kyun-Il RAH
  • Publication number: 20160085005
    Abstract: There is provided a stretched laminate formed by stretching a laminate including: a non-stretched thermoplastic polyurethane film; and a non-stretched polyvinyl alcohol-based film attached to at least one surface of the thermoplastic polyurethane film, wherein the polyvinyl alcohol-based film has a thickness of 10 ?m or less after stretching. In addition, there are provided a method of manufacturing a thin polarizer using the stretched laminate, a thin polarizer manufacturing by the method, and a polarizing plate including the thin polarizer.
    Type: Application
    Filed: June 16, 2014
    Publication date: March 24, 2016
    Inventors: Sung-Hyun NAM, Jong-Hyun JUNG, Kyun-Il RAH, Hye-Min YU
  • Publication number: 20160070042
    Abstract: Provided are a base film, a laminate, and a method of forming a polarizing film. Particularly, a base film which may effectively form a polarizing film having a thickness of approximately 10, 8, 7, 6, or 5 ?m or less and exhibiting excellent functions such as polarizing performance, a laminate, and a method of forming the same are provided. Therefore, a polarizing film may be formed by preventing tearing or curling during an elongation process, and easily elongating a polarizing material such as a polyvinylalcohol-based resin.
    Type: Application
    Filed: June 19, 2014
    Publication date: March 10, 2016
    Applicant: LG Chem, Ltd.
    Inventors: Se Woo Yang, Sung Hyun Nam, Yoon Tae Hwang, Jong Hyun Jung, Suk Ky Chang, Kyun Il Rah
  • Publication number: 20160062010
    Abstract: The present disclosure relates to a polarizing plate including an adhesive layer, a primer layer and a polyethylene terephthalate film which are sequentially formed on at least one side of a polarizer, wherein the adhesive layer in the present disclosure is formed by an active energy ray-curable adhesive including a first epoxy compound of which a homopolymer has a glass transition temperature of 120° C. or higher, a second epoxy compound of which a homopolymer has a glass transition temperature of 60° C. or lower, and a cationic photopolymerization initiator, and wherein the primer layer is formed by a primer composition including one or more binder resins selected from the group consisting of polyester and polyvinyl alcohol-based resins, and one or more cross-linking agents selected from the group consisting of acrylic cross-linking agents, epoxy-based cross-linking agents and polyvinyl alcohol-based cross-linking agents.
    Type: Application
    Filed: June 18, 2014
    Publication date: March 3, 2016
    Inventors: Sung-Hyun NAM, Eun-Mi SEO, Seung-Hee NAM, Dae-Woong LEE, Kyun-Il RAH
  • Patent number: 9250358
    Abstract: Provided are an adhesive for a polarizing plate and a polarizing plate comprising the same, and more particularly, an adhesive composition for a polarizing plate comprising one or more acrylic monomers having a hydrophilic group, a radical polymerization initiator, an epoxy resin, and a cationic photopolymerization initiator, as well as a polarizing plate comprising a polarizer, a polymer film adhered to one side or both sides of the polarizer, and an adhesive layer for bonding the polarizer and the polymer film, in which the adhesive layer is formed of an adhesive composition comprising one or more acrylic monomers having a hydrophilic group, a radical polymerization initiator, an epoxy resin, and a cationic photopolymerization initiator.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: February 2, 2016
    Assignee: LG Chem, Ltd.
    Inventors: Sae-Han Cho, Eun-Mi Seo, Boong-Goon Jeong, Kyun-Il Rah, Nam-Jeong Lee
  • Publication number: 20160016388
    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: Application
    Filed: June 16, 2014
    Publication date: January 21, 2016
    Inventors: Sung Hyun NAM, Jong-Hyun JUNG, Kyun-Il RAH, Hye-Min YU, Se-Woo YANG, Yoon-Tae HWANG
  • Publication number: 20160018577
    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: Application
    Filed: June 13, 2014
    Publication date: January 21, 2016
    Inventors: Sung-Hyun NAM, Kyun-IL RAH, Jong-Hyun JUNG, Hye-Min YU
  • Publication number: 20150309234
    Abstract: The present disclosure relates to a method for preparing a thin polarizer, and a thin polarizer prepared using the same, the method including forming a film laminate by attaching a non-stretched polyvinyl alcohol (PVA) film having a thickness of 10 to 60 ?m to at least one surface of a non-stretched base film, using attractive force therebetween; and stretching the film laminate such that the thickness of the PVA film is 10 ?m or less.
    Type: Application
    Filed: November 14, 2013
    Publication date: October 29, 2015
    Inventors: Sung-Hyun NAM, Jun-Geun UM, Kyun-Il RAH, Jong-Hyun JUNG, Hye-Min YU, Nam-Jeong LEE, Sei-Jung PARK
  • Publication number: 20150301252
    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: Application
    Filed: November 15, 2013
    Publication date: October 22, 2015
    Inventors: Sung-Hyun Nam, Jong-Hyun Jung, Kyun-Il Rah, Hye-Min Yu, Ji-Young Kim