Patents by Inventor Yooseock Hwang

Yooseock Hwang 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: 9884461
    Abstract: Disclosed is a wide casting belt, and more particularly, a wide casting belt used for manufacturing a film in a gel state by casting dope used during the manufacture of a polarizing plate for a liquid crystal display, and an optical compensation film, etc. A method for manufacturing a wide film using the wide casting belt, and a wide film manufactured with the wide casting belt are disclosed.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: February 6, 2018
    Assignee: Berndorf Band GmbH
    Inventors: Hyukjun Kim, Kwangjin Chung, Cholho Lee, Yooseock Hwang, Juntae Choi, Kinam Chung
  • Patent number: 9428624
    Abstract: A method for manufacturing a wide film comprises a casting operation, a stretching operation, and a trimming operation. The casting operation is a process of casting a film using a wide casting belt including a central belt, a left belt having a right end formed integrally with a left end of the central belt through a left joint in a length direction of the central belt, and a right belt having a left end formed integrally with a right end of the central belt through a right joint in the length direction of the central belt. The stretching operation is a process of stretching a film stripped off from the wide casting belt using a tenter. The trimming operation is a process of trimming predetermined parts of left and right sides of the stretched film. In the trimming operation, mark parts by the left and right joints are also trimmed.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: August 30, 2016
    Assignee: SK INNOVATION CO., LTD.
    Inventors: Hyukjun Kim, Kwangjin Chung, Cholho Lee, Yooseock Hwang, Juntae Choi, Kinam Chung
  • Publication number: 20140295017
    Abstract: Disclosed is a wide casting belt, and more particularly, a wide casting belt used for manufacturing a film in a gel state by casting dope used during the manufacture of a polarizing plate for a liquid crystal display, and an optical compensation film, etc. A method for manufacturing a wide film using the wide casting belt, and a wide film manufactured with the wide casting belt are disclosed.
    Type: Application
    Filed: June 5, 2014
    Publication date: October 2, 2014
    Inventors: Hyukjun KIM, Kwangjin CHUNG, Cholho LEE, Yooseock HWANG, Juntae CHOI, Kinam CHUNG
  • Patent number: 8784725
    Abstract: The present invention relates to a wide casting belt, and more particularly, to a wide casting belt used for manufacturing a film in a gel state by casting dope used during the manufacture of a polarizing plate for a liquid crystal display, and an optical compensation film, etc. The present invention also relates to a method for manufacturing a wide film using the wide casting belt, and to a wide film manufactured with said wide casting belt.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: July 22, 2014
    Assignee: SK Innovation Co., Ltd.
    Inventors: Hyukjun Kim, Kwangjin Chung, Cholho Lee, Yooseock Hwang, Juntae Choi, Kinam Chung
  • Patent number: 8570472
    Abstract: Provided are an optical compensation film and a method for producing the same. The optical compensation film includes a nematic liquid crystal compound including a compound having at least two mesogens linked to each other with a constant angle, and has hybrid alignment in which the alignment of the liquid crystal compound varies gradually along the thickness direction.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: October 29, 2013
    Assignee: SK Innovation Co., Ltd.
    Inventors: Yonggyun Cho, Kwangjin Chung, Cholho Lee, Yooseock Hwang, Hyukjun Kim, Kiyup Kim, Sungho Son, Kibeom Kim
  • Publication number: 20130189508
    Abstract: A method for manufacturing a wide film comprises a casting operation, a stretching operation, and a trimming operation. The casting operation is a process of casting a film using a wide casting belt including a central belt, a left belt having a right end formed integrally with a left end of the central belt through a left joint in a length direction of the central belt, and a right belt having a left end formed integrally with a right end of the central belt through a right joint in the length direction of the central belt. The stretching operation is a process of stretching a film stripped off from the wide casting belt using a tenter. The trimming operation is a process of trimming predetermined parts of left and right sides of the stretched film. In the trimming operation, mark parts by the left and right joints are also trimmed.
    Type: Application
    Filed: September 7, 2012
    Publication date: July 25, 2013
    Applicant: SK INNOVATION CO., LTD.
    Inventors: Hyukjun KIM, Kwangjin CHUNG, Cholho LEE, Yooseock HWANG, Juntae CHOI, Kinam CHUNG
  • Publication number: 20120128944
    Abstract: The present invention relates to a wide casting belt, and more particularly, to a wide casting belt used for manufacturing a film in a gel state by casting dope used during the manufacture of a polarizing plate for a liquid crystal display, and an optical compensation film, etc. The present invention also relates to a method for manufacturing a wide film using the wide casting belt, and to a wide film manufactured with said wide casting belt.
    Type: Application
    Filed: June 4, 2009
    Publication date: May 24, 2012
    Applicant: SK INNOVATION CO., LTD.
    Inventors: Hyukjun Kim, Kwangjin Chung, Cholho Lee, Yooseock Hwang, Juntae Choi, Kinam Chung
  • Publication number: 20110317101
    Abstract: Provided are an optical compensation film and a method for producing the same. The optical compensation film includes a nematic liquid crystal compound including a compound having at least two mesogens linked to each other with a constant angle, and has hybrid alignment in which the alignment of the liquid crystal compound varies gradually along the thickness direction.
    Type: Application
    Filed: February 25, 2010
    Publication date: December 29, 2011
    Applicant: SK INNOVATION CO., LTD.
    Inventors: Yonggyun Cho, Kwangjin Chung, Cholho Lee, Yooseock Hwang, Hyukjun Kim, Kiyup Kim, Sungho Son, Kibeom Kim