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).
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Patent number: 11391991Abstract: 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: GrantFiled: September 4, 2019Date of Patent: July 19, 2022Inventors: Eun Jung Lim, Sergey Belyaev, Min Jun Gim, Dong Hyun Oh
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Patent number: 11347080Abstract: 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: GrantFiled: April 30, 2018Date of Patent: May 31, 2022Inventors: 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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Publication number: 20220137437Abstract: A light modulation element that can vary between a bright transparent mode and a dark scattering mode is provided. The light modulation element has a first light modulation layer and a second light modulation layer comprising nematic liquid crystals and a dichroic dye in a scattering mode when a voltage is applied. The first light modulation layer and the second light modulation layer are disposed to overlap each other. The light modulation element has an improved contrast ratio and haze-variable characteristics, without precipitation of dichroic dyes and an increase in power consumption.Type: ApplicationFiled: March 3, 2020Publication date: May 5, 2022Applicant: LG Chem, Ltd.Inventors: Min Jun Gim, Eun Jung Lim, Jung Sun You, Jin Hong Kim, Hyun Jun Lee, Dong Hyun Oh
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Patent number: 11314106Abstract: 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: GrantFiled: April 30, 2018Date of Patent: April 26, 2022Inventors: Min Jun Gim, Eun Jung Lim, Jung Sun You, Dong Hyun Oh, Hyun Jun Lee, Nam Hun Kim
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Patent number: 11262600Abstract: 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: July 16, 2020Date of Patent: March 1, 2022Inventors: Hyun Jun Lee, Eun Jung Lim, Jung Sun You, Min Jun Gim, Dong Hyun Oh, Jin Hong Kim
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Publication number: 20210311342Abstract: 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: ApplicationFiled: September 4, 2019Publication date: October 7, 2021Applicant: LG Chem, Ltd.Inventors: Eun Jung Lim, Min Jun Gim, Sergey Belyaev, Dong Hyun Oh
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Patent number: 11137650Abstract: 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: GrantFiled: September 27, 2018Date of Patent: October 5, 2021Inventors: 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: 11099435Abstract: 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: GrantFiled: October 30, 2018Date of Patent: August 24, 2021Inventors: 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: 20210240012Abstract: 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: ApplicationFiled: September 4, 2019Publication date: August 5, 2021Applicant: 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
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Publication number: 20210165284Abstract: 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: ApplicationFiled: September 4, 2019Publication date: June 3, 2021Applicant: LG Chem, Ltd.Inventors: Eun Jung Lim, Sergey Belyaev, Min Jun Gim, Dong Hyun Oh
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Patent number: 11009725Abstract: 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: GrantFiled: April 30, 2018Date of Patent: May 18, 2021Inventors: 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
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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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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: 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: 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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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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Publication number: 20200142246Abstract: 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: ApplicationFiled: April 30, 2018Publication date: May 7, 2020Applicant: LG Chem, Ltd.Inventors: Min Jun Gim, Eun Jung Lim, Jung Sun You, Dong Hyun Oh, Hyun Jun Lee, Nam Hun Kim
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Publication number: 20200096807Abstract: 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: ApplicationFiled: April 30, 2018Publication date: March 26, 2020Applicant: 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