Patents by Inventor Eun Jung Lim

Eun Jung Lim 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: 11226519
    Abstract: A light modulation element and the use thereof are provided. The light modulation element can suppress a surface waviness phenomenon upon surface reflection visual observation by improving surface waviness of a base film caused by a spacer. Such light modulation element can be applied to various flexible display devices to improve the quality of products.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: January 18, 2022
    Inventors: Jung Sun You, Dong Hyun Oh, Nam Gyu Kim, Eun Jung Lim
  • Publication number: 20210311342
    Abstract: A transmittance-variable device is disclosed herein. In some embodiments, the transmittance-variable device includes a retardation film, a liquid crystal alignment film, and a liquid crystal layer configured to implement a twist orientation mode, wherein the retardation film, the liquid crystal alignment film and the liquid crystal layer are sequentially arranged, wherein a twist angle (T) is in a range of 50 degrees to 180 degrees, and wherein the smallest angle A between a slow axis of the retardation film and an alignment direction of the liquid crystal alignment film satisfies Equation 1 when a product (?nd) of a refractive index anisotropy (?n) and a thickness (d) is 0.7 ?m or less, and satisfies Equation 2 when the product (?nd) is more than 0.7 ?m. The transmittance-variable device can be applied to various applications without causing problems such as a crosstalk phenomenon, a rainbow phenomenon or a mirroring phenomenon.
    Type: Application
    Filed: September 4, 2019
    Publication date: October 7, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Eun Jung Lim, Min Jun Gim, Sergey Belyaev, Dong Hyun Oh
  • Patent number: 11137650
    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: Grant
    Filed: September 27, 2018
    Date of Patent: October 5, 2021
    Inventors: Eun Jung Lim, Dong Hyun Oh, Jung Sun You, Jin Hong Kim, Hyun Jun Lee, Nam Hun Kim, Min Jun Gim
  • Patent number: 11099435
    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: Grant
    Filed: October 30, 2018
    Date of Patent: August 24, 2021
    Inventors: Eun Jung Lim, Sergey Belyaev, Dong Hyun Oh, Jung Sun You, Jin Hong Kim, Hyun Jun Lee, Min Jun Gim
  • Publication number: 20210240012
    Abstract: A transmittance-variable device is provided in the present application. The present application provides a transmittance-variable device, which can be applied to various applications without causing problems such as a crosstalk phenomenon, a rainbow phenomenon or a mirroring phenomenon, while having excellent transmittance-variable characteristics.
    Type: Application
    Filed: September 4, 2019
    Publication date: August 5, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Eun Jung Lim, Sergey Belyaev, Min Jun Gim, Dong Hyun Oh, Jung Sun You, Nam Gyu Kim, Jin Hong Kim, Hyun Jun Lee
  • Publication number: 20210223595
    Abstract: A light modulation element and the use thereof are provided. The light modulation element can suppress a surface waviness phenomenon upon surface reflection visual observation by improving surface waviness of a base film caused by a spacer. Such light modulation element can be applied to various flexible display devices to improve the quality of products.
    Type: Application
    Filed: July 2, 2019
    Publication date: July 22, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Jung Sun You, Dong Hyun Oh, Nam Gyu Kim, Eun Jung Lim
  • Patent number: 11036093
    Abstract: The present application relates to a method of manufacturing an optical device, an optical device and a use of the optical device. The method of manufacturing an optical device of the present application can form a patterned mold layer to maintain an appropriate gap between the upper and lower substrates, and can apply an imprinting process in patterning the mold layer to simply manufacture the mold pattern having the desired shape. In addition, the optical device manufactured by the above manufacturing method can have a low driving voltage and no short circuit phenomenon, and be realized as a flexible device. Such an optical device can be applied to various display devices such as LCDs.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: June 15, 2021
    Inventors: Jung Sun You, Sung Joon Min, Dong Hyun Oh, Jin Hong Kim, Jung Woon Kim, Eun Jung Lim
  • Publication number: 20210165284
    Abstract: A transmittance-variable device is provided in the present application. The present application can provide a transmittance-variable device, which can be applied to various applications without causing problems such as a crosstalk phenomenon, a rainbow phenomenon or a mirroring phenomenon, while having excellent transmittance-variable characteristics.
    Type: Application
    Filed: September 4, 2019
    Publication date: June 3, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Eun Jung Lim, Sergey Belyaev, Min Jun Gim, Dong Hyun Oh
  • Patent number: 11009725
    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: Grant
    Filed: April 30, 2018
    Date of Patent: May 18, 2021
    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
  • Patent number: 11003032
    Abstract: A transmittance-variable device is disclosed herein. In some embodiments, the transmittance-variable device includes a first guest host layer, a second guest host layer, and a phase difference element disposed between the first and second guest host layers, wherein each of the first and second guest host layers comprise a liquid crystal host and a dichroic dye guest, and the liquid crystal hosts are capable of being horizontally oriented such that their optical axes are horizontal to each other. The transmittance-variable device can switch between a clear state and a black state, can exhibit high transmittance in the clear state and a high shielding rate in the black state, and can exhibit a high contrast ratio even at the inclination angle. Such a transmittance-variable device can be used in architectural or automotive materials, or eyewear such as goggles for augmented reality experience or sports, sunglasses or helmets.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: May 11, 2021
    Inventors: Dong Hyun Oh, Eun Jung Lim, Nam Hun Kim
  • Patent number: 10954444
    Abstract: The present application relates to a novel liquid crystal compound and a use thereof. The novel liquid crystal compounds of the present application can exhibit a smectic A phase over a wide temperature range. The novel liquid crystal compounds of the present application can be usefully used in the technical fields to which smectic A liquid crystals can be applied, for example, bistable devices.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: March 23, 2021
    Inventors: Eun Jung Lim, Ki Chul Koo, Dong Hyun Oh
  • Patent number: 10941344
    Abstract: A liquid crystal cell which is capable of switching between a transparent mode and a scattering mode by using a non-ionic compound as a liquid crystal additive for realizing the EHDI characteristics and has excellent performance such as a driving voltage characteristic, a haze characteristic and reliability by securing solubility of the additive for liquid crystals. Such a liquid crystal cell can be applied to various light modulation devices such as a smart window, a window protective film, a flexible display device, a light shielding plate for transparent display, an active retarder for 3D image display, or a viewing angle adjusting film.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: March 9, 2021
    Inventors: Jung Woon Kim, Eun Jung Lim, Dong Hyun Oh
  • 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: 20200354634
    Abstract: A coating composition, a method for manufacturing a substrate using the same, and an optical device are provided. The method for manufacturing the substrate provides the substrate having excellent performance, as the substrate has fixed spacers on its surface; by using a single layer in which nanoparticles and spacers are dispersed in an alignment film to reduce processes and cost. The optical device may be manufactured by such method.
    Type: Application
    Filed: January 24, 2019
    Publication date: November 12, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Hyun Jun Lee, Jung Sun You, Dong Hyun Oh, Eun Jung Lim
  • 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: 20200225393
    Abstract: A reflectance-variable mirror using a liquid crystal cell is disclosed herein. In an embodiment, the reflectance-variable mirror may comprise a first liquid crystal cell including a guest host liquid crystal layer, a first reflective polarizing film, a second liquid crystal cell including a retardation-variable liquid crystal layer, a second reflective polarizing film and an absorbing plate sequentially. The reflectance-variable mirror can realize excellent reflectance-variable characteristics by lowering the reflectance in an antireflection mode.
    Type: Application
    Filed: December 22, 2017
    Publication date: July 16, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Eun Jung Lim, Jin Hong Kim, Dong Hyun Oh, Jung Sun You, Hyun Jun Lee, Nam Hun Kim
  • 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