Patents by Inventor Tae Kurokawa
Tae Kurokawa 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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Publication number: 20250116900Abstract: A liquid crystal light control device in an embodiment according to the present invention includes a first liquid crystal cell, a second liquid crystal cell overlapping the first liquid crystal cell, a third liquid crystal cell overlapping the second liquid crystal cell, and a fourth liquid crystal cell overlapping the third liquid crystal, each of the first liquid crystal cell, the second liquid crystal cell, the third liquid crystal cell, and the fourth liquid crystal cell includes a first substrate arranged with a first electrode having a strip pattern, a second substrate arranged with a second electrode having a strip pattern, and a liquid crystal layer between the first substrate and the second substrate. The first substrate and the second substrate are arranged with a longitudinal direction of the strip pattern of the first electrode and second electrode intersecting.Type: ApplicationFiled: December 19, 2024Publication date: April 10, 2025Inventors: Tae KUROKAWA, Takeo KOITO, Kojiro IKEDA
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Publication number: 20250116902Abstract: A liquid crystal light control device includes a plurality of liquid crystal cells arranged in a stack. Each of the plurality of liquid crystal cells includes a first substrate and a second substrate opposite the first substrate, a first electrode and a second electrode both of which have a strip pattern arranged on at least one of the first substrate and the second substrate, a first alignment film on the first substrate and a second alignment film on the second substrate, and a liquid crystal layer between the first substrate and the second substrate. The strip pattern is arranged alternately with the first electrode and the second electrode, an alignment direction of the first alignment film is aligned with a direction of extension of the strip pattern, and an alignment direction of the second alignment film is arranged intersecting the alignment direction of the first alignment film.Type: ApplicationFiled: December 16, 2024Publication date: April 10, 2025Inventors: Kojiro IKEDA, Takeo KOITO, Tae KUROKAWA
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Patent number: 12216363Abstract: A liquid crystal light control device in an embodiment according to the present invention includes a first liquid crystal cell, a second liquid crystal cell overlapping the first liquid crystal cell, a third liquid crystal cell overlapping the second liquid crystal cell, and a fourth liquid crystal cell overlapping the third liquid crystal, each of the first liquid crystal cell, the second liquid crystal cell, the third liquid crystal cell, and the fourth liquid crystal cell includes a first substrate arranged with a first electrode having a strip pattern, a second substrate arranged with a second electrode having a strip pattern, and a liquid crystal layer between the first substrate and the second substrate. The first substrate and the second substrate are arranged with a longitudinal direction of the strip pattern of the first electrode and second electrode intersecting.Type: GrantFiled: August 8, 2023Date of Patent: February 4, 2025Assignee: Japan Display Inc.Inventors: Tae Kurokawa, Takeo Koito, Kojiro Ikeda
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Publication number: 20250035988Abstract: A liquid crystal light control device includes a first liquid crystal cell, a second liquid crystal cell overlapping the first liquid crystal cell, a third liquid crystal cell overlapping the second liquid crystal cell, and a fourth liquid crystal cell overlapping the third liquid crystal cell. Each of the first, second, third, and the fourth liquid crystal cells includes, a first substrate including a first alignment film, a second substrate including an electrode having a strip pattern and a second alignment film, and a liquid crystal layer between the first substrate and the second substrate. An alignment direction of the first alignment film and an alignment direction of the second alignment film are aligned to intersect each other. A longitudinal direction of the strip pattern of the electrode having the strip pattern is arranged to intersect an alignment direction of the second alignment film.Type: ApplicationFiled: October 11, 2024Publication date: January 30, 2025Inventors: Kojiro IKEDA, Takeo KOITO, Tae KUROKAWA
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Patent number: 12210251Abstract: A liquid crystal light control device includes a plurality of liquid crystal cells arranged in a stack. Each of the plurality of liquid crystal cells includes a first substrate and a second substrate opposite the first substrate, a first electrode and a second electrode both of which have a strip pattern arranged on at least one of the first substrate and the second substrate, a first alignment film on the first substrate and a second alignment film on the second substrate, and a liquid crystal layer between the first substrate and the second substrate. The strip pattern is arranged alternately with the first electrode and the second electrode, an alignment direction of the first alignment film is aligned with a direction of extension of the strip pattern, and an alignment direction of the second alignment film is arranged intersecting the alignment direction of the first alignment film.Type: GrantFiled: February 16, 2024Date of Patent: January 28, 2025Assignee: Japan Display Inc.Inventors: Kojiro Ikeda, Takeo Koito, Tae Kurokawa
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Publication number: 20250027631Abstract: An optical element includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell and the second liquid crystal cell are stacked. Each of the first liquid crystal cell and the second liquid crystal cell includes a first substrate on which a first transparent electrode and a second transparent electrode are alternately and repeatedly arranged in a first direction, a second substrate on which a third transparent electrode and a fourth transparent electrode are alternately and repeatedly arranged in a second direction intersecting the first direction, and a liquid crystal layer between the first substrate and the second substrate. The second substrate of the first liquid crystal cell and the first substrate of the second liquid crystal cell are adjacent to each other.Type: ApplicationFiled: October 7, 2024Publication date: January 23, 2025Inventors: Tae KUROKAWA, Takeo KOITO, Kojiro IKEDA
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Patent number: 12174493Abstract: A liquid crystal light control device in an embodiment according to the present invention includes a first liquid crystal cell, and a second liquid crystal cell overlapping the first liquid crystal cell. Each of the first liquid crystal cell and the second liquid crystal cell includes a first substrate arranged with a first electrode having a strip pattern, a second substrate arranged with a second electrode having a strip pattern, and a liquid crystal layer between the first substrate and the second substrate. A longitudinal direction of the strip pattern of the first electrode and a longitudinal direction of the strip pattern of the second electrode are arranged to intersect at an angle in the range of 45 degrees±10 degrees.Type: GrantFiled: September 19, 2023Date of Patent: December 24, 2024Assignee: Japan Display Inc.Inventors: Takeo Koito, Tae Kurokawa, Kojiro Ikeda
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Patent number: 12169336Abstract: According to an aspect, an optical element includes: a first substrate including a first electrode; a second substrate stacked on the first substrate and including a second electrode; a liquid crystal layer provided between the first substrate and the second substrate; a sealing member extending along an outer periphery of the liquid crystal layer; a first spacer provided on an inner side of the sealing member; and a conductive column provided on an outer side of the sealing member and electrically connecting the first electrode and the second electrode. The conductive column and the first spacer include the same material.Type: GrantFiled: April 7, 2023Date of Patent: December 17, 2024Assignee: Japan Display Inc.Inventors: Takeo Koito, Kojiro Ikeda, Tae Kurokawa
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Patent number: 12163642Abstract: A lighting device includes a light emitting module and an optical element including first and second liquid crystal cells. Each of the first and second liquid crystal cells includes first and second transparent electrodes extending in a first direction and third and fourth transparent electrodes extending in a second direction. The light emitting module includes a light source, a light guide plate including an end surface into which light emitted from the light source is incident and a first surface from which the light incident into the end surface is emitted, and a prism sheet disposed opposite to the first surface. The second substrate of the first liquid crystal cell and the first substrate of the second liquid crystal cell are adjacent to each other. The first surface includes a plurality of first grooves extending in a third direction intersecting the first direction and the second direction.Type: GrantFiled: November 22, 2023Date of Patent: December 10, 2024Assignee: Japan Display Inc.Inventors: Kojiro Ikeda, Takeo Koito, Tae Kurokawa, Keiji Takizawa
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Patent number: 12140837Abstract: A liquid crystal light control device includes a first liquid crystal cell, a second liquid crystal cell overlapping the first liquid crystal cell, a third liquid crystal cell overlapping the second liquid crystal cell, and a fourth liquid crystal cell overlapping the third liquid crystal cell. Each of the first, second, third, and the fourth liquid crystal cells includes, a first substrate including a first alignment film, a second substrate including an electrode having a strip pattern and a second alignment film, and a liquid crystal layer between the first substrate and the second substrate. An alignment direction of the first alignment film and an alignment direction of the second alignment film are aligned to intersect each other. A longitudinal direction of the strip pattern of the electrode having the strip pattern is arranged to intersect an alignment direction of the second alignment film.Type: GrantFiled: September 15, 2023Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventors: Kojiro Ikeda, Takeo Koito, Tae Kurokawa
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Patent number: 12140306Abstract: An optical element includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell and the second liquid crystal cell are stacked. Each of the first liquid crystal cell and the second liquid crystal cell includes a first substrate on which a first transparent electrode and a second transparent electrode are alternately and repeatedly arranged in a first direction, a second substrate on which a third transparent electrode and a fourth transparent electrode are alternately and repeatedly arranged in a second direction intersecting the first direction, and a liquid crystal layer between the first substrate and the second substrate. The second substrate of the first liquid crystal cell and the first substrate of the second liquid crystal cell are adjacent to each other.Type: GrantFiled: August 8, 2023Date of Patent: November 12, 2024Assignee: Japan Display Inc.Inventors: Tae Kurokawa, Takeo Koito, Kojiro Ikeda
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Publication number: 20240337883Abstract: An optical element includes at least two liquid crystal cells. The at least two liquid crystal cells include a first substrate on which a first transparent electrode and a second transparent electrode are alternately and repeatedly arranged in a first direction, a second substrate on which a third transparent electrode and a fourth transparent electrode are alternately and repeatedly arranged in a second direction intersecting the first direction, and a liquid crystal layer between the first substrate and the second substrate. The second transparent electrode comprises a first bent portion bent in the first direction. The fourth transparent electrode comprises a second bent portion bent in the second direction.Type: ApplicationFiled: June 11, 2024Publication date: October 10, 2024Inventors: Tae KUROKAWA, Takeo KOITO, Kojiro IKEDA
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Patent number: 12038655Abstract: An optical element includes at least two liquid crystal cells. The at least two liquid crystal cells include a first substrate on which a first transparent electrode and a second transparent electrode are alternately and repeatedly arranged in a first direction, a second substrate on which a third transparent electrode and a fourth transparent electrode are alternately and repeatedly arranged in a second direction intersecting the first direction, and a liquid crystal layer between the first substrate and the second substrate. The second transparent electrode comprises a first bent portion bent in the first direction. The fourth transparent electrode comprises a second bent portion bent in the second direction.Type: GrantFiled: July 14, 2023Date of Patent: July 16, 2024Assignee: Japan Display Inc.Inventors: Tae Kurokawa, Takeo Koito, Kojiro Ikeda
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Publication number: 20240184170Abstract: A liquid crystal light control device includes a plurality of liquid crystal cells arranged in a stack. Each of the plurality of liquid crystal cells includes a first substrate and a second substrate opposite the first substrate, a first electrode and a second electrode both of which have a strip pattern arranged on at least one of the first substrate and the second substrate, a first alignment film on the first substrate and a second alignment film on the second substrate, and a liquid crystal layer between the first substrate and the second substrate. The strip pattern is arranged alternately with the first electrode and the second electrode, an alignment direction of the first alignment film is aligned with a direction of extension of the strip pattern, and an alignment direction of the second alignment film is arranged intersecting the alignment direction of the first alignment film.Type: ApplicationFiled: February 16, 2024Publication date: June 6, 2024Inventors: Kojiro IKEDA, Takeo KOITO, Tae KUROKAWA
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Patent number: 11988924Abstract: According to one embodiment, a light control device includes a first substrate including first to third electrodes formed in an annular shape and a fourth electrode, a second substrate, and a liquid crystal layer held between the first substrate and the second substrate. The first electrode and the second electrode are arranged in a first direction. The first electrode and the third electrode are arranged in a direction different from the first direction. The fourth electrode is adjacent to the first to third electrodes.Type: GrantFiled: June 3, 2022Date of Patent: May 21, 2024Assignee: Japan Display Inc.Inventors: Tae Kurokawa, Takeo Koito, Masashi Mitsui
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Publication number: 20240117955Abstract: A lighting device includes a light emitting module and an optical element including first and second liquid crystal cells. Each of the first and second liquid crystal cells includes first and second transparent electrodes extending in a first direction and third and fourth transparent electrodes extending in a second direction. The light emitting module includes a light source, a light guide plate including an end surface into which light emitted from the light source is incident and a first surface from which the light incident into the end surface is emitted, and a prism sheet disposed opposite to the first surface. The second substrate of the first liquid crystal cell and the first substrate of the second liquid crystal cell are adjacent to each other. The first surface includes a plurality of first grooves extending in a third direction intersecting the first direction and the second direction.Type: ApplicationFiled: November 22, 2023Publication date: April 11, 2024Inventors: Kojiro IKEDA, Takeo KOITO, Tae KUROKAWA, Keiji TAKIZAWA
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Publication number: 20240102633Abstract: A lighting device includes a light source having a first optical element and a second optical element emitting directional light, and one liquid crystal optical element transmitting or diffusing the light emitted from the light source. The first and the second optical elements include a first and a second light exit surfaces, and the first and the second light exit surfaces are arranged to direct in different directions. The liquid crystal optical element has a second electrode group arranged adjacent to a first electrode group. The first electrode group has a first transparent electrode and a second transparent electrode. The second electrode group has a third transparent electrode and a fourth transparent electrode. A pitch at which the first transparent electrodes and the second transparent electrodes are alternately arranged is different from a pitch at which the third transparent electrodes and the fourth transparent electrodes are alternately arranged.Type: ApplicationFiled: November 29, 2023Publication date: March 28, 2024Inventors: Kojiro IKEDA, Takeo KOITO, Tae KUROKAWA
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Patent number: 11940710Abstract: According to one embodiment, a light control device includes a first liquid crystal cell including a first liquid crystal layer, a second liquid crystal cell including a second liquid crystal layer, and a polarization conversion element. The first liquid crystal layer and the second liquid crystal layer each includes a first region which scatters a first polarized component and transmits a second polarized component and a second region which transmits the first polarized component and scatters the second polarized component. The polarization conversion element overlaps the first region and the second region, converts the first polarized component into the second polarized component, and converts the second polarized component into the first polarized component.Type: GrantFiled: April 12, 2023Date of Patent: March 26, 2024Assignee: JAPAN DISPLAY INC.Inventors: Tae Kurokawa, Takeo Koito, Masashi Mitsui
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Patent number: 11940687Abstract: According to one embodiment, a display device includes a first substrate including a light-shielding layer and a conductive line having a first side surface and a second side surface on a side opposite to the first side surface, a second substrate opposed to the first substrate, a polymer dispersed liquid crystal layer held between the first substrate and the second substrate, and including a polymer and liquid crystal molecules, and a light-emitting element opposed to an end portion of at least one of the first substrate and the second substrate, wherein the first side surface is closer to the light-emitting element than the second side surface, and the light-shielding layer covers at least the first side surface of the conductive line.Type: GrantFiled: March 21, 2023Date of Patent: March 26, 2024Assignee: Japan Display Inc.Inventors: Tae Kurokawa, Kentaro Okuyama
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Patent number: 11934082Abstract: According to one embodiment, a light control device includes a first substrate including a plurality of first control electrodes disposed in an effective area, and a plurality of feed lines disposed in a peripheral area, a second substrate, and a first liquid crystal layer. The first control electrodes are transparent electrodes. Each of the first control electrodes includes, in the effective area, first segments crossing a first direction at a first angle, second segments crossing the first direction at a second angle, and third segments crossing the first direction at a third angle. The first control electrode is electrically connected to the feed line. The first to third angles are different from each other.Type: GrantFiled: April 15, 2022Date of Patent: March 19, 2024Assignee: Japan Display Inc.Inventors: Takeo Koito, Masashi Mitsui, Tae Kurokawa