Patents by Inventor Min-Jun Gim

Min-Jun Gim 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: 20200409181
    Abstract: A light modulation device is disclosed herein. In some embodiments, a light modulation device includes a first polymer film substrate, a second polymer film substrate, an active liquid crystal layer disposed between the first and second polymer film substrates, wherein the active liquid crystal layer is capable of switching between a first orientation state and a second orientation state different from the first orientation state under an applied voltage, the first and second polymer film substrates have an in-plane retardation of 4,000 nm or more for light having a wavelength of 550 nm, a ratio of an elongation (E1) in a first direction to an elongation (E2) in a second direction perpendicular to the first direction of 3 or more, and wherein an angle formed by the first directions of the first and second polymer film substrates is in a range of 0 degrees to 10 degrees.
    Type: Application
    Filed: April 30, 2018
    Publication date: December 31, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Min Jun Gim, Dong Hyun Oh, Jung Sun You, Eun Jung Lim, Jin Hong Kim, Hyun Jun Lee, Nam Hun Kim
  • Publication number: 20200348556
    Abstract: The present application relates to a light modulation device and a use thereof. The present application can provide a light modulation device having both excellent mechanical properties and optical properties by applying a polymer film that is also optically anisotropic and mechanically anisotropic to a substrate.
    Type: Application
    Filed: July 16, 2020
    Publication date: November 5, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Hyun Jun Lee, Eun Jung Lim, Jung Sun You, Min Jun Gim, Dong Hyun Oh, Jin Hong Kim
  • Publication number: 20200319494
    Abstract: The present application relates to a light modulating device and an eyewear. The present application can provide a light modulation device having both excellent mechanical properties and optical properties by applying a polymer film that is also optically anisotropic and mechanically anisotropic to a substrate.
    Type: Application
    Filed: April 30, 2018
    Publication date: October 8, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Eun Jung Lim, Nam Hun Kim, Jung Sun You, Jin Hong Kim, Hyun Jun Lee, Min Jun Gim, Kyung Ki Hong, In Ju Mun, Dong Hyun Oh
  • Patent number: 10768461
    Abstract: The present application relates to a light modulation device and a use thereof. The present application can provide a light modulation device having both excellent mechanical properties and optical properties by applying a polymer film that is also optically anisotropic and mechanically anisotropic to a substrate.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: September 8, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Hyun Jun Lee, Eun Jung Lim, Jung Sun You, Min Jun Gim, Dong Hyun Oh, Jin Hong Kim
  • Publication number: 20200233246
    Abstract: A transmittance-variable device is disclosed herein. In some embodiments, a transmittance-variable device includes first and second guest host layers, the first and second guest host layers are superposed, wherein each of the first and second guest host layers comprise a liquid crystal host and a dichroic dye guest, and wherein the device is capable of switching between a transparent mode and a black mode. The transmittance-variable device can exhibit high transmittance in the transparent state and a high shielding rate in the black state, and can exhibit a high contrast ratio even at the inclination angle, and exhibit excellent viewing angle symmetry in all directions. Such a transmittance-variable device can be applied to various applications including various architectural or automotive materials which need to adjust the transmittance, or eyewear such as goggles for augmented reality experience or sports, sunglasses or helmets.
    Type: Application
    Filed: October 30, 2018
    Publication date: July 23, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Eun Jung Lim, Sergey Belyaev, Dong Hyun Oh, Jung Sun You, Jin Hong Kim, Hyun Jun Lee, Min Jun Gim
  • Publication number: 20200201094
    Abstract: The present application relates to an optical element, a driving method of the optical element, a transmittance-variable device and a use thereof. In one example, the present application may provide a driving method suppressing a back-flow phenomenon caused by a bulk liquid crystal compound even when a cell gap of a liquid crystal layer becomes thick. The driving method may ensure excellent response speeds and driving characteristics.
    Type: Application
    Filed: September 27, 2018
    Publication date: June 25, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Eun Jung Lim, Dong Hyun Oh, Jung Sun You, Jin Hong Kim, Hyun Jun Lee, Nam Hun Kim, Min Jun Gim
  • Publication number: 20200159061
    Abstract: A light modulation device is disclosed herein. In some embodiments, a light modulation device includes a first polymer film substrate, a second polymer film substrate, an active liquid crystal layer disposed between the first and second polymer film substrates, a reflective layer, wherein the active liquid crystal layer is capable of switching between a first orientation state and a second orientation state different from the first orientation state upon application of a voltage, each of the polymer film substrates has an in-plane retardation of 4,000 nm or more for light having a wavelength of 550 nm, a ratio of an elongation (E1) in a first direction to an elongation (E2) in a second direction perpendicular to the first direction of 3 or more, and wherein an angle formed by the first directions of the first and second polymer film substrates is in a range of 0 degrees to 10 degrees.
    Type: Application
    Filed: April 30, 2018
    Publication date: May 21, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Min Jun Gim, Eun Jung Lim, Jung Sun You, Jin Hong Kim, Dong Hyun Oh, Hyun Jun Lee
  • Publication number: 20200142246
    Abstract: A light modulation device is disclosed herein. In some embodiments, a light modulation device includes a first polymer film substrate, a second polymer film substrate, an active liquid crystal layer disposed between the first and second polymer film substrates, wherein the active liquid crystal layer is capable of switching between a first orientation state and a second orientation state when a voltage is applied, and a polarizer, wherein each of the first and second polymer film substrates have in-plane retardation of 4,000 nm or more for light having a wavelength of 550 nm, a ratio of an elongation (E1) in a first direction to an elongation (E2) in a second direction perpendicular to the first direction of 3 or more, and wherein an angle formed by the first directions of the first and second polymer film substrates is in a range of 0 degrees to 10 degrees.
    Type: Application
    Filed: April 30, 2018
    Publication date: May 7, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Min Jun Gim, Eun Jung Lim, Jung Sun You, Dong Hyun Oh, Hyun Jun Lee, Nam Hun Kim
  • Publication number: 20200096807
    Abstract: A light modulation device is disclosed herein. In some embodiments, a light modulation device includes a first polymer film substrate, a second polymer film substrate, an active liquid crystal layer disposed between the first and second polymer film substrates, wherein the active liquid crystal layer is capable of switching between a vertical orientation state and a twisting orientation state upon application of a voltage, each of the first and second polymer film substrates has an in-plane retardation of 4,000 nm or more for light having a wavelength of 550 nm, a ratio of an elongation (E1) in a first direction to an elongation (E2) in a second direction perpendicular to the first direction of 3 or more, and wherein an angle formed by the first directions of the first and second polymer film substrates is in a range of 0 degrees to 10 degrees.
    Type: Application
    Filed: April 30, 2018
    Publication date: March 26, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Min Jun Gim, Eun Jung Lim, Jung Sun You, Hyun Jun Lee, In Ju Mun, Dong Hyun Oh, Nam Gyu Kim, Jin Hong Kim, Hyo Jin Lee, Nam Hun Kim
  • Publication number: 20190384094
    Abstract: The present application relates to a light modulation device and a use thereof. The present application can provide a light modulation device having both excellent mechanical properties and optical properties by applying a polymer film that is also optically anisotropic and mechanically anisotropic to a substrate.
    Type: Application
    Filed: April 30, 2018
    Publication date: December 19, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Hyun Jun Lee, Eun Jung Lim, Jung Sun You, Min Jun Gim, Dong Hyun Oh, Jin Hong Kim
  • Patent number: 10162213
    Abstract: A method of producing a polarizing light-emitting film using photoluminescent ferroelectric liquid crystal molecules, and a liquid crystal display including the polarizing light-emitting film, are described. The method includes forming a droplet by positioning photoluminescent ferroelectric liquid crystal molecules on a substrate modified to be molecular phobic, and applying an electric field in a horizontal direction to uniaxially orient the liquid crystal molecules. By such method, it is possible to produce the polarizing light-emitting film in which the photoluminescent ferroelectric liquid crystal molecules are uniaxially oriented to simultaneously act as the liquid crystal layer, the polarizing plate, and the color filter. The liquid crystal display including the polarizing light-emitting film is capable of improving polarization and contrast, and implementing colors even without a polarizing plate and color filter, thereby increasing light efficiency and power efficiency and reducing production cost.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: December 25, 2018
    Assignee: KOREA ADVANCED INSTITUTE INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Dong Ki Yoon, Min-Jun Gim
  • Publication number: 20170108751
    Abstract: The present invention relates to a method of producing a polarizing light-emitting film using photoluminescent ferroelectric liquid crystal molecules, and a liquid crystal display including the polarizing light-emitting film, and more specifically, to a method of producing a polarizing light-emitting film including: forming a droplet by positioning photoluminescent ferroelectric liquid crystal molecules on a substrate modified to be molecular phobic, and applying an electric field in a horizontal direction to uniaxially orient the liquid crystal molecules, and a liquid crystal display including the polarizing light-emitting film.
    Type: Application
    Filed: October 18, 2016
    Publication date: April 20, 2017
    Inventors: Dong Ki Yoon, Min-Jun Gim