Patents by Inventor Jun-won Chang

Jun-won Chang 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: 9651819
    Abstract: A polarizer for use in an IPS-LCD includes: a polarizing element; and a retardation film laminate attached to a surface of the polarizing element. The retardation film laminate includes a combination of a +B film and a ?B film or a combination of a +B film and a +A film.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: May 16, 2017
    Assignee: LG CHEM, LTD.
    Inventors: Jun-Won Chang, Moon-Soo Park
  • Patent number: 8994914
    Abstract: There is provided an integrated wide viewing film including: a first film having an optical axis located in-plan; and a second film having an optical axis located in a thickness direction thereof, and inclined at a predetermined angle in an in-plane direction. The IPS-LCD employing the integrated wide viewing film can be significantly improved in a contrast ratio in a diagonal direction.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: March 31, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Jun-Won Chang, Belyaev Sergey, Malimonenko Nikolay
  • Patent number: 8767151
    Abstract: There is provided an integrated wide viewing film including: a first film having an optical axis located in-plan; and a second film having an optical axis located in a thickness direction thereof, and inclined at a predetermined angle in an in-plane direction. The IPS-LCD employing the integrated wide viewing film can be significantly improved in a contrast ratio in a diagonal direction.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: July 1, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Jun-Won Chang, Belyaev Sergey, Malimonenko Nikolay
  • Patent number: 8743326
    Abstract: There is provided an integrated wide viewing film including: a first film having an optical axis located in-plan; and a second film having an optical axis located in a thickness direction thereof, and inclined at a predetermined angle in an in-plane direction. The IPS-LCD employing the integrated wide viewing film can be significantly improved in a contrast ratio in a diagonal direction.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: June 3, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Jun-Won Chang, Belyaev Sergey, Malimonenko Nikolay
  • Publication number: 20120293758
    Abstract: There is provided an integrated wide viewing film including: a first film having an optical axis located in-plan; and a second film having an optical axis located in a thickness direction thereof, and inclined at a predetermined angle in an in-plane direction. The IPS-LCD employing the integrated wide viewing film can be significantly improved in a contrast ratio in a diagonal direction.
    Type: Application
    Filed: May 31, 2012
    Publication date: November 22, 2012
    Inventors: Jun-Won CHANG, Belyaev SERGEY, Malimonenko NIKOLAY
  • Publication number: 20120293754
    Abstract: There is provided an integrated wide viewing film including: a first film having an optical axis located in-plan; and a second film having an optical axis located in a thickness direction thereof, and inclined at a predetermined angle in an in-plane direction. The IPS-LCD employing the integrated wide viewing film can be significantly improved in a contrast ratio in a diagonal direction.
    Type: Application
    Filed: May 31, 2012
    Publication date: November 22, 2012
    Inventors: Jun-Won CHANG, Belyaev SERGEY, Malimonenko NIKOLAY
  • Publication number: 20120293764
    Abstract: There is provided an integrated wide viewing film including: a first film having an optical axis located in-plan; and a second film having an optical axis located in a thickness direction thereof, and inclined at a predetermined angle in an in-plane direction. The IPS-LCD employing the integrated wide viewing film can be significantly improved in a contrast ratio in a diagonal direction.
    Type: Application
    Filed: May 31, 2012
    Publication date: November 22, 2012
    Inventors: Jun-Won CHANG, Belyaev SERGEY, Malimonenko NIKOLAY
  • Patent number: 8305545
    Abstract: There is provided an integrated wide viewing film including: a first film having an optical axis located in-plan; and a second film having an optical axis located in a thickness direction thereof, and inclined at a predetermined angle in an in-plane direction. The IPS-LCD employing the integrated wide viewing film can be significantly improved in a contrast ratio in a diagonal direction.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: November 6, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Jun-Won Chang, Belyaev Sergey, Malimonenko Nikolay
  • Publication number: 20110255038
    Abstract: A polarizer for use in an IPS-LCD includes: a polarizing element; and a retardation film laminate attached to a surface of the polarizing element. The retardation film laminate includes a combination of a +B film and a ?B film or a combination of a +B film and a +A film.
    Type: Application
    Filed: December 24, 2009
    Publication date: October 20, 2011
    Inventors: Jun-Won Chang, Moon-Soo Park
  • Publication number: 20110001906
    Abstract: There is provided a polarizer integrally containing view angle compensating film used in an in-plane switching liquid crystal display (IPS-LCD) filled with liquid crystal (??>0) having positive dielectric anisotropy and an in-plane switching liquid crystal display comprising the same. More particularly There is provided an integrated polarizer capable of being used to manufacture a thin polarizer and securing a good view angle by employing a view angle compensating film as a protective film of a polarizing film forming the polarizer and an IPS-LCD comprising the same.
    Type: Application
    Filed: March 24, 2009
    Publication date: January 6, 2011
    Inventors: Jun-Won Chang, Dae-Hee Lee, Moon-Soo Park
  • Patent number: 7807235
    Abstract: The present invention relates to a retardation film having a homeotropic alignment liquid crystal film prepared from coating a liquid crystal mixed solution containing a polymerizable reactive liquid crystal monomer on an oriented retardation film so as to improve a viewing angle characteristic of an ISP mode liquid crystal display and reduce a color shift and a method for preparing the same. There is an advantage in that since a homeotropic alignment liquid crystal film with a retardation of a thickness direction is prepared using a liquid crystal mixed solution containing a reactive liquid crystal monomer, the retardation film according to the present invention is not required for high-temperature heat treatment and cooling processes so that it can be applied to a high-speed continuous process.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: October 5, 2010
    Assignee: LG Chem, Ltd.
    Inventors: Eun-Kyung Kim, Moon-Soo Park, Jun-Won Chang, Sin-Young Kim
  • Publication number: 20100177267
    Abstract: There is provided an integrated wide viewing film including: a first film having an optical axis located in-plan; and a second film having an optical axis located in a thickness direction thereof, and inclined at a 5predetermined angle in an in-plane direction. The IPS-LCD employing the integrated wide viewing film can be significantly improved in a contrast ratio in a diagonal direction.
    Type: Application
    Filed: December 4, 2008
    Publication date: July 15, 2010
    Applicant: LG CHEM, LTD.
    Inventors: Jun-Won Chang, Belyaev Sergey, Malimonenko Nikolay
  • Patent number: 7474370
    Abstract: A vertically aligned liquid crystal display (VA-LCD) according to one embodiment has liquid crystal cells in which liquid crystals with a negative dielectric anisotropy are filled and which is provided between a first polarizer and a second polarizer, whose absorption axes are perpendicular to each other. The VA-LCD includes a sheet of +A plate and a sheet of ?C plate, disposed between the first polarizer and the liquid crystal cells, and a sheet of +A plate disposed between the second polarizer and the liquid crystal cells, where an optical axis of the +A plate near the first polarizer is perpendicular to the absorption axis of the first polarizer, and an optical axis of the +A plate near the second polarizer is parallel with the absorption axis of the second polarizer, and where a thickness retardation value of the ?C plate is in the range of ?500 nm to ?30 nm for a wavelength of 550 nm.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: January 6, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Soo-jin Jang, Byoung-kun Jeon, Sergey Belyaev, Jun-won Chang
  • Publication number: 20060182900
    Abstract: The present invention relates to a retardation film having a homeotropic alignment liquid crystal film, a polarizing film, an IPS (In-Plane Switching) mode liquid crystal display and a method for preparing the same. More particularly, the present invention relates to a homeotropic alignment liquid crystal film prepared from a liquid crystal mixed solution containing a polymerizable reactive liquid crystal monomer so as to improve a viewing angle characteristic of an ISP mode liquid crystal display and reduce a color shift; a retardation film prepared by integrating an oriented retardation film and a method for preparing the same; a polarizing film having the retardation film located between a polarizing element or plate and a liquid crystal cell and a method for preparing the same; and an IPS mode liquid crystal display having the polarizing film.
    Type: Application
    Filed: February 14, 2006
    Publication date: August 17, 2006
    Applicant: LG CHEM, LTD.
    Inventors: Eun-Kyung Kim, Moon-Soo Park, Jun-Won Chang, Sin-Young Kim
  • Publication number: 20060103798
    Abstract: Disclosed is a vertically aligned liquid crystal display (VA-LCD) having wider viewing angle and having high contrast at the right angle and tilt angles. According to one embodiment of the present invention, the VA-LCD having liquid crystal cells in which liquid crystals with a negative dielectric anisotropy are filled and which is provided between a first polarizer and a second polarizer, whose absorption axises are perpendicular to each other, includes a sheet of +A plate and a sheet of ?C plate, disposed between the first polarizer and the liquid crystal cells; and a sheet of +A plate disposed between the second polarizer and the liquid crystal cells, wherein an optical axis of the +A plate near the first polarizer is perpendicular to the absorption axis of the first polarizer, and an optical axis of the +A plate near the second polarizer is perpendicular to the absorption axis of the second polarizer.
    Type: Application
    Filed: November 14, 2005
    Publication date: May 18, 2006
    Inventors: Soo-jin Jang, Byoung-kun Jeon, Sergey Belyaev, Jun-won Chang