Patents by Inventor Dong Hyun Oh
Dong Hyun Oh 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).
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Patent number: 10954444Abstract: 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: GrantFiled: May 23, 2017Date of Patent: March 23, 2021Inventors: Eun Jung Lim, Ki Chul Koo, Dong Hyun Oh
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Patent number: 10941344Abstract: 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: GrantFiled: August 25, 2016Date of Patent: March 9, 2021Inventors: Jung Woon Kim, Eun Jung Lim, Dong Hyun Oh
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Publication number: 20210047874Abstract: Disclosed is an access control apparatus according to the present invention. The access control apparatus includes: a body located on a passage; an opening and closing part coupled to the body and having a multi-stepped door adapted to open and close the passage through a translational motion; and a driving part coupled to the body and the opening and closing part to control an operation of the opening and closing part, wherein the driving part has a linear motor and the multi-stepped door includes a first door driven by means of the linear motor and a second door coupled to the first door in such a manner as to be interlocked with the first door.Type: ApplicationFiled: June 25, 2018Publication date: February 18, 2021Inventors: Yong Hee HAN, Dong Hyun OH, Dong Ho LEE
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Publication number: 20200409181Abstract: 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: ApplicationFiled: April 30, 2018Publication date: December 31, 2020Applicant: 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
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Patent number: 10878262Abstract: Disclosed herein is a multi biometric terminal that includes a host system capable of recognizing two or more physical features. The host system includes a biometric data input unit configured to acquire biometric data of a user, and a biometric data identification unit configured to compare the acquired biometric data with pre-registered biometric data of the user to perform identification. When a body of the user approaches in a non-contact manner, the biometric data input unit receives a plurality of types of biometric data from the body. The host system is accommodated in a single module or housing.Type: GrantFiled: January 5, 2018Date of Patent: December 29, 2020Assignees: CRUCIALTEC CO.LTD., CRUCIALTRAK, INC.Inventors: Dong Hyun Oh, Yong Hee Han, Dong Ho Lee
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Publication number: 20200354634Abstract: 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: ApplicationFiled: January 24, 2019Publication date: November 12, 2020Applicant: LG Chem, Ltd.Inventors: Hyun Jun Lee, Jung Sun You, Dong Hyun Oh, Eun Jung Lim
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Publication number: 20200348556Abstract: 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: ApplicationFiled: July 16, 2020Publication date: November 5, 2020Applicant: LG Chem, Ltd.Inventors: Hyun Jun Lee, Eun Jung Lim, Jung Sun You, Min Jun Gim, Dong Hyun Oh, Jin Hong Kim
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Publication number: 20200319504Abstract: A transmittance-variable film having a double-cell structure or a single-cell structure capable of suppressing formation of bubbles inside a liquid crystal layer or at the interface between a base film and a pressure-sensitive adhesive layer under high-temperature and high-humidity reliability conditions is provided. An exemplary transmittance-variable film can be applied to various applications, including various construction or automotive materials that require control of transmittance, or eyewear, such as augmented reality experience or sports goggles, sunglasses or helmets.Type: ApplicationFiled: December 19, 2018Publication date: October 8, 2020Applicant: LG Chem, Ltd.Inventors: Jung Doo Kim, Hyun Jun Lee, Yeon Keun Lee, Joo Hyun Lee, Dong Hyun Oh
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Publication number: 20200319494Abstract: 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: ApplicationFiled: April 30, 2018Publication date: October 8, 2020Applicant: 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
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Patent number: 10768461Abstract: 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: GrantFiled: April 30, 2018Date of Patent: September 8, 2020Assignee: LG Chem, Ltd.Inventors: Hyun Jun Lee, Eun Jung Lim, Jung Sun You, Min Jun Gim, Dong Hyun Oh, Jin Hong Kim
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Publication number: 20200233246Abstract: 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: ApplicationFiled: October 30, 2018Publication date: July 23, 2020Applicant: LG Chem, Ltd.Inventors: Eun Jung Lim, Sergey Belyaev, Dong Hyun Oh, Jung Sun You, Jin Hong Kim, Hyun Jun Lee, Min Jun Gim
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Publication number: 20200233252Abstract: A substrate having a spacer thereon and an optical device including the same are disclosed herein. In some embodiments, a substrate includes a base layer, a transparent column spacer formed on the base layer, and a black layer present between the transparent column spacer and the base layer. In some embodiments, an alignment film is present on the spacer.Type: ApplicationFiled: January 24, 2020Publication date: July 23, 2020Applicant: LG Chem, Ltd.Inventors: Nam Seok Bae, Seung Heon Lee, Song Ho Jang, Dong Hyun Oh, Jin Woo Park, Ji Young Hwang, Jung Sun You, Han Min Seo, Cheol Ock Song
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Publication number: 20200226864Abstract: Disclosed is an access control apparatus according to the present invention. The access control apparatus includes: a body located on a passage and having a plurality of support frames; an opening and closing part detachably attached between the plurality of support frames to open and close the passage; and a driving part coupled to the body and the opening and closing part to control an operation of the opening and closing part and having an angle control module for adjusting an opening and closing angle of the opening and closing part and a speed control module for setting an opening and closing speed of the opening and closing part, wherein the driving part controls the opening and closing part so that the opening and closing part is stopped from closing at a given angle through the angle control module.Type: ApplicationFiled: June 25, 2018Publication date: July 16, 2020Inventors: Dong Hyun OH, Yong Hee HAN, Dong Ho LEE
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Publication number: 20200225393Abstract: 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: ApplicationFiled: December 22, 2017Publication date: July 16, 2020Applicant: LG Chem, Ltd.Inventors: Eun Jung Lim, Jin Hong Kim, Dong Hyun Oh, Jung Sun You, Hyun Jun Lee, Nam Hun Kim
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Publication number: 20200201094Abstract: 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: ApplicationFiled: September 27, 2018Publication date: June 25, 2020Applicant: 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
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Patent number: 10663825Abstract: The present application relates to a liquid crystal device. The liquid crystal device of the present application may realize a transparent white state, a transparent black state and a scattering state according to a frequency and/or level of an applied voltage. The liquid crystal device may be applied to, for example, a window of a vehicle, a smart window, a window protective film, a display, a light cutoff panel for a display, an active retarder for a 3D image display or a viewing angle controlling film.Type: GrantFiled: March 31, 2016Date of Patent: May 26, 2020Assignee: LG Chem, Ltd.Inventors: Eun Jung Lim, Sung Joon Min, Jung Sun You, Jung Woon Kim, Jin Hong Kim, Dong Hyun Oh
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Patent number: 10663828Abstract: The present application relates to a liquid crystal device. The liquid crystal device of the present application may realize a transparent white state, a transparent black state and a scattering state according to a level of an applied voltage at a fixed frequency. The liquid crystal device may be applied to, for example, a window of a vehicle, a smart window, a window protective film, a display, a light cutoff panel for a display, an active retarder for a 3D image display or a viewing angle controlling film.Type: GrantFiled: March 31, 2016Date of Patent: May 26, 2020Assignee: LG Chem, Ltd.Inventors: Eun Jung Lim, Sung Joon Min, Jung Sun You, Jung Woon Kim, Jin Hong Kim, Dong Hyun Oh
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Publication number: 20200159061Abstract: 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: ApplicationFiled: April 30, 2018Publication date: May 21, 2020Applicant: LG Chem, Ltd.Inventors: Min Jun Gim, Eun Jung Lim, Jung Sun You, Jin Hong Kim, Dong Hyun Oh, Hyun Jun Lee
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Patent number: 10656480Abstract: A transmittance-variable film and the use thereof are provided. The transmittance-variable film can be useful in switching between a clear state and a dark state and reducing a difference in contrast ratio between left and right viewing angles, thereby securing excellent bilateral symmetry. Such a transmittance-variable film can be applied to various applications including various materials for buildings or vehicles requiring the control of transmissivity, or eyewear such as goggles for sports or experiencing augmented realities, sunglasses, helmets, etc.Type: GrantFiled: April 14, 2017Date of Patent: May 19, 2020Assignee: LG Chem, Ltd.Inventors: Dong Hyun Oh, Jung Sun You, Eun Jung Lim, In Ju Mun, Kyung Ki Hong, Kum Suek Seo, Hyo Jin Lee
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Publication number: 20200150478Abstract: A substrate on which spacers are disposed in a certain arrangement state and an optical device using such a substrate are provided. A plurality of spacers are irregularly disposed on a substrate depending on a predetermined rule, so that overall uniform optical characteristics can be ensured without causing a so-called moire phenomenon or the like, while the spacers maintain the uniform cell gap in the construction of the optical device.Type: ApplicationFiled: July 27, 2018Publication date: May 14, 2020Applicant: LG Chem, Ltd.Inventors: Han Min Seo, Ji Young Hwang, Hyeon Choi, Seung Heon Lee, Dong Hyun Oh, Jung Sun You, Cheol Ock Song, Nam Seok Bae