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).

  • Patent number: 11022845
    Abstract: This application relates to a laminate which comprises: a first polarization rotation layer; a second polarization rotation layer; and a positive C plate provided between the first polarization rotation layer and the second polarization rotation layer, the first polarization rotation layer comprises a first half wave plate and a first quarter wave plate, and the second polarization rotation layer comprises a second half wave plate and a second quarter wave plate and a liquid crystal display comprising the same.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: June 1, 2021
    Assignee: LG CHEM, LTD.
    Inventors: Nayoung Shin, Junwon Chang, Moon Soo Park, Kyun Il Rah
  • Patent number: 11009643
    Abstract: This application relates to a laminate comprising: a first half wave plate; a second half wave plate; and a positive C plate provided between the first half wave plate and the second half wave plate and a liquid crystal display comprising the same.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: May 18, 2021
    Assignee: LG CHEM, LTD
    Inventors: Junwon Chang, Nayoung Shin, Moon Soo Park, Kyun Il Rah
  • Publication number: 20210088854
    Abstract: The present application relates to a liquid crystal display comprising: an upper polarizer; a lower polarizer; and a liquid crystal panel provided between the upper polarizer and the lower polarizer, in which the upper polarizer and the lower polarizer are provided such that the absorption axes thereof are parallel to each other, a wavelength plate is comprised between the upper polarizer and the liquid crystal panel which rotates linear polarized light at 85 to 90 degrees, and the liquid crystal panel is a horizontally aligned liquid crystal mode.
    Type: Application
    Filed: December 26, 2018
    Publication date: March 25, 2021
    Inventors: Nayoung Shin, Junwon Chang, Moon Soo Park, Kyun Il Rah, Sun Kug Kim
  • Patent number: 10928572
    Abstract: The present specification relates to a method for manufacturing a polarizing plate and a polarizing plate. More particularly, the present specification relates to a method for manufacturing a polarizing plate locally having a depolarization region, and a polarizing plate.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: February 23, 2021
    Inventors: Byung Sun Lee, Sung Hyun Nam, Kyun Il Rah
  • Publication number: 20210048715
    Abstract: This application relates to a liquid crystal display which comprises: an upper polarizer; a lower polarizer; and a liquid crystal panel provided between the upper polarizer and the lower polarizer, in which the upper polarizer and the lower polarizer are provided so that absorption axes of the upper and lower polarizers are parallel to each other, a first half wave plate, a positive C plate, and a second half wave plate are sequentially comprised between the upper polarizer and the liquid crystal panel, and the liquid crystal panel is a vertical alignment liquid crystal mode.
    Type: Application
    Filed: June 4, 2019
    Publication date: February 18, 2021
    Inventors: Nayoung Shin, Junwon Chang, Moon Soo Park, Kyun Il Rah
  • Publication number: 20210018668
    Abstract: The present invention relates to a polarizing plate, a liquid crystal panel and a display device, and more specifically to a polarizing plate including a polarizer, and a hard coating layer having a thickness of 10 ?m or less and a light-transmitting substrate which are positioned so as to face each other on the basis of the polarizer, and to a liquid crystal panel and a display device including the same.
    Type: Application
    Filed: April 26, 2019
    Publication date: January 21, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Jung Hyun SEO, Kyun Il RAH, Young Gon KIM, Taek Geun NAM, Gae Sung KIM, Hyun Soo LEE, Keon Woo KIM
  • Publication number: 20200393606
    Abstract: This application relates to a laminate comprising: a first half wave plate; a second half wave plate; and a positive C plate provided between the first half wave plate and the second half wave plate and a liquid crystal display comprising the same.
    Type: Application
    Filed: June 3, 2019
    Publication date: December 17, 2020
    Inventors: Junwon Chang, Nayoung Shin, Moon Soo Park, Kyun Il Rah
  • Publication number: 20200209449
    Abstract: The present application relates to a stacked polarizing plate comprising: a polyvinyl alcohol-based polarizer having one or more of iodine and a dichroic dye; and a film provided on one surface of the polyvinyl alcohol-based polarizing plate and comprising a lyotropic liquid crystal compound which absorbs light having a wavelength of 380 nm to 780 nm, and a liquid crystal display device comprising the same.
    Type: Application
    Filed: November 13, 2018
    Publication date: July 2, 2020
    Inventors: Byung Sun Lee, Kyun Il Rah
  • Patent number: 10647098
    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: Grant
    Filed: July 1, 2016
    Date of Patent: May 12, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Se Woo Yang, Sung Hyun Nam, Kyun Il Rah
  • Patent number: 10649271
    Abstract: The present application relates to a polarizing plate and a display device. In the present application, a polarizing plate can be provided, which can be applied to a display device comprising a highly reflective panel to solve disadvantages while maintaining advantages of the device. In the present application, a display device comprising the polarizing plate and the highly reflective panel can also be provided.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: May 12, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Sung Hyun Nam, Kyung Ki Hong, Yeong Rae Chang, Heon Kim, Kyun Il Rah, Jong Hyun Jung, Byung Sun Lee, Eung Jin Jang, Jin Yong Park, Deok Woo Park, Ji Young Kim
  • Patent number: 10634835
    Abstract: The present application relates to a polarizing plate and a display device. In the present application, a polarizing plate can be provided, which can be applied to a display device comprising a highly reflective panel to solve disadvantages while maintaining advantages of the device. In the present application, a display device comprising the polarizing plate and the highly reflective panel can also be provided.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: April 28, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Sung Hyun Nam, Kyun Il Rah, Byung Sun Lee, Jong Hyun Jung, Ji Young Kim
  • Patent number: 10527769
    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: Grant
    Filed: December 3, 2018
    Date of Patent: January 7, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Byung Sun Lee, Ji Young Kim, Sung Hyun Nam, Kyun Il Rah
  • Patent number: 10479870
    Abstract: The present specification relates to a method for manufacturing a polarizer, the method including: a step of dyeing at least one dye of iodine and dichroic dyes on a polyvinyl alcohol-based film; a first cross-linking step of cross-linking the polyvinyl alcohol-based film and the dye by using a first aqueous solution including a polyvalent carboxylic acid compound and a boron compound; a second cross-linking step of cross-linking the polyvinyl alcohol-based film and the dye by using a second aqueous solution including a polyvalent carboxylic acid compound and a boron compound; and a third cross-linking step of cross-linking the polyvinyl alcohol-based film and the dye by using a third aqueous solution including a polyvalent carboxylic acid compound, in which in the first cross-linking step and the second cross-linking step, stretching is performed along with cross-linking, and a polarizer manufactured by using the same.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: November 19, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Ji Young Kim, Ji Young Kim, Hye Min Yu, Kyun Il Rah, Jin Yong Park, Eungki Lee, Taek Geun Nam
  • Patent number: 10451915
    Abstract: The present invention relates to a polarizing plate including a polyethylene terephthalate film and having an excellent optical property, and a method for manufacturing the same, and the polarizing plate of the present invention includes: 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 and a glyoxalate crosslinking agent at a weight ratio of 100:5 to 100:50, and the primer layer is formed by using a primer composition including a polyester-based compound and an acryl-based compound.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: October 22, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Sung Hyun Nam, Seunghee Nam, Kyun Il Rah, Dae Woong Lee
  • Patent number: 10436962
    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: Grant
    Filed: September 26, 2014
    Date of Patent: October 8, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Byung-Sun Lee, Sung-Hyun Nam, Kyun-Il Rah
  • Patent number: 10436960
    Abstract: The present invention relates to a method for manufacturing a polarizing element including locally bleached areas including steps of providing a polarizing element including a polyvinyl alcohol-based polarizer in which at least one or more of iodine and dichroic dye is oriented in a certain direction; partially bleaching the polyvinyl alcohol-based polarizer by bringing a bleaching solution into contact with one surface of the polyvinyl alcohol-based polarizer through a printing method; and correcting an appearance of the partially bleached polarizing element.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: October 8, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Beom Seok Lee, Eung Jin Jang, Kyun Il Rah, Hyung Koo Kang, Byung Sun Lee, Du Jin Choi, Ho Jeong Yun
  • Patent number: 10429560
    Abstract: The present invention relates to a method for manufacturing a polarizing element including locally bleached areas including steps of providing a polarizing element including a polyvinyl alcohol-based polarizer in which at least one of iodine and dichroic dye is oriented in a certain direction; forming a mask layer including at least one punched area on one surface of the polarizing element; partially bleaching the polarizing element formed with the mask layer by immersing the polarizing element into a bleaching solution; and correcting an appearance of the partially bleached polarizing element.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: October 1, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Beom Seok Lee, Eung Jin Jang, Kyun Il Rah, Hyung Koo Kang, Byung Sun Lee, Du Jin Choi, Ho Jeong Yun
  • Patent number: 10359553
    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: Grant
    Filed: March 25, 2015
    Date of Patent: July 23, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Byung Sun Lee, Sung Hyun Nam, Kyun Il Rah
  • Patent number: 10353125
    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: Grant
    Filed: June 18, 2014
    Date of Patent: July 16, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Sung-Hyun Nam, Eun-Mi Seo, Seung-Hee Nam, Dae-Woong Lee, Kyun-Il Rah
  • Patent number: 10302833
    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: Grant
    Filed: February 1, 2016
    Date of Patent: May 28, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Sung Hyun Nam, Kyung Ki Hong, Eung Jin Jang, Yeong Rae Chang, Heon Kim, Kyun Il Rah, Jong Hyun Jung, Byung Sun Lee, Hong Jun Choi, Moon Soo Park, Sun Kug Kim