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: 8962103
    Abstract: A liquid crystal film (LCF), a method of manufacturing the same, an optical device, or an LCD is provided. The exemplified LCF can be used as a reflective polarization plate, which can improve luminance and light utilization efficiency of a display device, such as an LCD, and the like.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: February 24, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Dae Hee Lee, Jun Won Chang, Moon Soo Park
  • Publication number: 20140285751
    Abstract: The present application relates to a liquid crystal cell, a method for preparing a liquid crystal cell and a display device. An exemplary liquid crystal cell may be applied to various types of display devices so as to control a viewing angle or light transmittance of the display device.
    Type: Application
    Filed: June 6, 2014
    Publication date: September 25, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Sung Joon MIN, Dong Hyun OH, Jun Won CHANG, Kyung Jun KIM, Hye Won JEONG, Moon Soo PARK
  • Publication number: 20140285752
    Abstract: The present application relates to a liquid crystal cell, a method for preparing a liquid crystal cell and a display device. An exemplary liquid crystal cell may be applied to various types of display devices so as to control a viewing angle or light transmittance of the display device.
    Type: Application
    Filed: June 6, 2014
    Publication date: September 25, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Sung Joon MIN, Dong Hyun OH, Jun Won CHANG, Kyung Jun KIM, Hye Won JEONG, Moon Soo PARK
  • 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: 20120320306
    Abstract: A liquid crystal film (LCF), a method of manufacturing the same, an optical device, or an LCD is provided. The exemplified LCF can be used as a reflective polarization plate, which can improve luminance and light utilization efficiency of a display device, such as an LCD, and the like.
    Type: Application
    Filed: November 10, 2011
    Publication date: December 20, 2012
    Inventors: Dae Hee Lee, Jun Won Chang, Moon Soo Park
  • 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: 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
  • 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
  • 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: 20120224126
    Abstract: A liquid crystal film (LCF) is provided. The exemplified LCF can be used as a reflective polarization plate, which can improve luminance and light utilization efficiency of a display device, such as an LCD, and the like.
    Type: Application
    Filed: May 17, 2012
    Publication date: September 6, 2012
    Inventors: Jun Won CHANG, Moon Soo Park, Dae Hee Lee
  • Publication number: 20120212692
    Abstract: A liquid crystal film, a method for manufacturing the same, a polarizing plate, and a liquid crystal display are provided. The liquid crystal film has excellent physical properties such as durability and an optical physical property so that it can be effectively used for various applications. In addition, the physical property of the liquid crystal film can be controlled according to desired purposes.
    Type: Application
    Filed: January 25, 2012
    Publication date: August 23, 2012
    Applicant: LG CHEM, LTD.
    Inventors: Su Young RYU, Moon Soo PARK, Jun Won CHANG, Sin Young KIM
  • Publication number: 20120075568
    Abstract: An optical film, a reflective polarizing plate and a display device are provided. For example, the optical film may be used in the reflective polarizing plate which may enhance the efficiency of light utilization of a display device such as a liquid crystal display device and improve the brightness.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 29, 2012
    Applicant: LG CHEM, LTD.
    Inventors: Jun Won CHANG, Dae Hee LEE, Moon Soo PARK, Sergey BELYAEV
  • 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
  • Patent number: 7956965
    Abstract: This invention provides a vertically aligned liquid crystal display, including a first polarizing plate and a second polarizing plate having absorption axes perpendicular to each other and a vertically aligned panel provided therebetween and including vertically aligned liquid crystals having negative dielectric anisotropy, in which a +A-film and a +C-film are provided between the first polarizing plate and the vertically aligned panel, the +C-film is positioned between the first polarizing plate and the +A-film, and the optic axis of the +A-film is parallel to or perpendicular to the absorption axis of the first polarizing plate. According to this invention, the contrast of the vertically aligned liquid crystal display can be improved at surface-facing angle and tilt angle thereof and the color shift depending on the viewing angle in a dark state can be minimized, thus greatly increasing the viewing angle range of the vertically aligned liquid crystal display.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: June 7, 2011
    Assignee: LG Chem, Ltd.
    Inventors: Byoung Kun Jeon, Sergey Belyaev, Nikolay Malimonenko, Jun Won Chang, Soo Jin Jang
  • 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: 7605895
    Abstract: Disclosed herein is an IPS-LCD using two sheets of negative (?) biaxial retardation films and one +C-plate. The IPS-LCD has a superior contrast ratio at the surface-facing angle and tilt angles and undergoes a minimal color change with viewing angles in a black state, thereby providing a wider viewing angle.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: October 20, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Byoung Kun Jeon, Sergey Belyaev, Nikolay Malimonenko, Jun Won Chang, Soo Jin Jang, Sang Choll Han
  • Patent number: 7511792
    Abstract: An IPS-LCD, in which the direction of an optical axis and retardation values are adjusted according to the disposition of a phase retardation film replacing one protective film, obtains a contrast ratio similar to that of an IPS-LCD having upper and lower protective films, and has a small thickness. The IPS-LCD includes first and second polarizing plates (1, 2), an IPS panel (3), and a first protective film. Absorption axes (4, 5) of the first and second polarizing plates (1, 2) are orthogonal to each other, and an optical axis of a liquid crystal in the IPS panel (3) and the absorption axis (4) are parallel with each other. A second phase retardation film, obtained by coating a biaxial film (17) with a uniaxial C film (11), is disposed between the second polarizing plate (2) and the IPS panel (3) and is used as a second protective film.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: March 31, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Jun Won Chang, Byoung Kun Jeon, Soo Jin Jang