Patents by Inventor Shinichiro Oka
Shinichiro Oka 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: 20250093708Abstract: A reflecting device includes a patch electrode, a common electrode, a liquid crystal layer sandwiched between the patch electrode and the common electrode, and a metal film arranged on the opposite side of the common electrode from the side of the liquid crystal layer, wherein the metal film is spaced apart from the common electrode, and the patch electrode is arranged to overlap the metal film. X can be the value obtained by multiplying a distance T between the common electrode and the metal film by the wavelength ? of the radio wave irradiated to the patch electrode, and x can be equal to or greater than 0.02 and less than or equal to 0.34. X can be equal to or greater than 0.10 and less than or equal to 0.22.Type: ApplicationFiled: December 2, 2024Publication date: March 20, 2025Applicant: Japan Display Inc.Inventors: Mitsutaka OKITA, Shinichiro OKA, Daiichi SUZUKI
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Patent number: 12253699Abstract: According to one embodiment, a liquid crystal optical element including a first substrate including a first transparent substrate, a first alignment film, and a first liquid crystal layer which includes first cholesteric liquid crystals, and which reflects part of light incident through the first transparent substrate toward the first transparent substrate, a second substrate including a second transparent substrate, a second alignment film, and a second liquid crystal layer which includes second cholesteric liquid crystals, and which reflects part of light transmitted through the first liquid crystal layer toward the first transparent substrate, and a transparent adhesive layer which adheres the first substrate and the second substrate.Type: GrantFiled: February 15, 2024Date of Patent: March 18, 2025Assignee: Japan Display Inc.Inventors: Koichi Igeta, Shinichiro Oka, Yasushi Tomioka, Junji Kobashi
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Publication number: 20250084288Abstract: A method for manufacturing a seal body includes a belt-like body forming step including a crosslinking agent adding step in which a crosslinking agent is added to a compound containing a halogen group-containing monomer as a constituent unit and mixed, a kneading step for kneading the obtained mixture, a pressurizing step for pressurizing the kneaded material, and a cutting step for cutting the pressurized body into a belt-like body, and a press-fixing step including a press-fixing/heating step of press-fixing one end and the other end of the belt-like body to form an endless seal body.Type: ApplicationFiled: July 27, 2022Publication date: March 13, 2025Inventors: Shinichiro OKA, Kensuke SEKIGUCHI, Yuichi AOYAGI, Keita SUZUKI
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Patent number: 12232351Abstract: A display device includes a flexible substrate including a first region including a display region, a second region including a curved region, and a third region including a terminal region; an electro-optical element located in the display region; and a resin layer continuously extending from the first region to the third region.Type: GrantFiled: August 14, 2023Date of Patent: February 18, 2025Assignee: Japan Display Inc.Inventors: Masumi Nishimura, Shinichiro Oka
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Publication number: 20250052937Abstract: According to one embodiment, a liquid crystal optical element includes a transparent substrate, and a liquid crystal layer which faces the transparent substrate and has a cholesteric liquid crystal and an additive exhibiting liquid crystallinity. Refractive anisotropy of the additive is less than refractive anisotropy of the liquid crystal layer.Type: ApplicationFiled: August 6, 2024Publication date: February 13, 2025Applicants: Japan Display Inc., OSAKA UNIVERSITYInventors: Koichi IGETA, Junji KOBASHI, Yasushi TOMIOKA, Shinichiro OKA, Hiroyuki YOSHIDA
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Publication number: 20250023252Abstract: A reflecting device includes a plurality of patch electrodes arranged in a first direction and in a second direction intersecting the first direction, and a common wiring connecting the plurality of patch electrodes in series in an array along the first direction. Each of the plurality of patch electrodes comprises a first length along the first direction and a second length along the second direction, and the first length is longer than the second length.Type: ApplicationFiled: September 27, 2024Publication date: January 16, 2025Applicant: Japan Display Inc.Inventors: Kazuki MATSUNAGA, Shinichiro OKA, Mitsutaka OKITA, Daiichi SUZUKI
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Publication number: 20250013102Abstract: According to one embodiment, a liquid crystal optical element includes a transparent substrate having a first main surface, an alignment control layer having a plurality of convex bodies, and a liquid crystal layer having a cholesteric liquid crystal. The alignment control layer has a first alignment area in which the convex bodies are arranged at a first pitch, and a second alignment area in which the convex bodies are arranged at a second pitch. The second pitch is less than the first pitch. The liquid crystal layer has a first liquid crystal area which overlaps the first alignment area, and a second liquid crystal area which overlaps the second alignment area.Type: ApplicationFiled: July 1, 2024Publication date: January 9, 2025Applicant: Japan Display Inc.Inventors: Ayaka HIGUCHI, Shinichiro OKA, Koichi IGETA, Junji KOBASHI
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Publication number: 20250015508Abstract: A reflect array includes a plurality of patch electrodes arranged spaced apart and interconnected to an incident surface of a radio wave, a plurality of control electrodes arranged spaced apart to correspond to the plurality of patch electrodes and disposed on a rear side of the plurality of patch electrodes, a liquid crystal layer between the plurality of patch electrodes and the plurality of control electrodes, and an auxiliary electrode disposed to overlap a separated region of the plurality of control electrodes.Type: ApplicationFiled: September 24, 2024Publication date: January 9, 2025Applicant: Japan Display Inc.Inventors: Daiichi SUZUKI, Takanori TSUNASHIMA, Masayuki IKARI, Shinichiro OKA, Mitsutaka OKITA, Kazuki MATSUNAGA
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Publication number: 20250010765Abstract: To provide a vehicle seat that can achieve both of improvement in operability of a reclining operation and size reduction of the entire vehicle seat. This vehicle seat includes a link mechanism pivoted to a seat cushion (cushion frame), a seat back (back frame), and a leg rest (leg frame), and a hinge pin which is engageable with the link mechanism and disengageable therefrom. In the vehicle seat in a state of being between a seating position and a relaxation position, the hinge pin is engaged with the link mechanism. Accordingly, the seat back and the leg rest can be inclined in coordination with sliding movement of the seat cushion relative to a vehicle body. Thus, the vehicle seat can achieve both of improvement in operability of a reclining operation and size reduction of the entire vehicle seat.Type: ApplicationFiled: July 3, 2024Publication date: January 9, 2025Applicant: TACHI-S CO., LTD.Inventor: Shinichiro Oka
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Publication number: 20250004322Abstract: A reflecting device in an embodiment according to the present invention includes common electrodes arranged in a matrix at a distance in a first direction and a second direction intersecting the first direction, bias electrodes arranged overlapping the common electrodes in a planar view, a liquid crystal layer between the common electrodes and the bias electrodes, and common wirings connecting adjacent common electrodes among the common electrodes. Each of the common wirings has a length of half an effective wavelength ?g when a radio wave of a specific wavelength ? propagates through the liquid crystal layer.Type: ApplicationFiled: September 16, 2024Publication date: January 2, 2025Applicant: Japan Display Inc.Inventors: Kazuki MATSUNAGA, Shinichiro OKA, Mitsutaka OKITA, Daiichi SUZUKI
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Publication number: 20240427066Abstract: According to one embodiment, a liquid crystal optical element includes a substrate, an alignment film, and a liquid crystal layer. The alignment film includes a plurality of first areas and a second area. The liquid crystal layer includes a first alignment area overlapping with the first area and including a plurality of first liquid crystal molecules forming an alignment pattern in which longitudinal axes of the first liquid crystal molecules successively vary and a second alignment area overlapping with the second area and including a plurality of second liquid crystal molecules, longitudinal axes of the plurality of second liquid crystal molecules being arranged in the same direction.Type: ApplicationFiled: September 9, 2024Publication date: December 26, 2024Applicant: Japan Display Inc.Inventors: Ayaka HIGUCHI, Shinichiro OKA, Yasushi TOMIOKA, Koichi IGETA
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Publication number: 20240427195Abstract: According to one embodiment, a liquid crystal optical element according to one embodiment includes a substrate, a plurality of structures aligned at a prescribed pitch in each of a plurality of first areas, and a liquid crystal layer arranged across the plurality of first areas and a second area surrounding each of the plurality of first areas. The liquid crystal layer includes first liquid crystal molecules arranged in the first areas between the adjacent structures and aligned along the structures, and second liquid crystal molecules having the long axes aligned in the same direction in the second area.Type: ApplicationFiled: September 6, 2024Publication date: December 26, 2024Applicant: Japan Display Inc.Inventors: Shinichiro OKA, Yasushi TOMIOKA, Koichi IGETA, Ayaka HIGUCHI, Tsuyoshi IYAMA, Ryoichi MATSUMOTO, Kiyoshi SHOHARA, Takeshi YAMAMOTO
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Publication number: 20240405441Abstract: Disclosed is an intelligent reflecting surface including a plurality of radio-wave reflecting devices, an adjusting substrate over the plurality of radio-wave reflecting devices, and an anti-reflective film located over the adjusting substrate and configured to absorb radio waves. Each of the plurality of radio-wave reflecting devices includes a pair of substrates and a plurality of radio-wave reflecting elements between the pair of substrates. The anti-reflective film has a lattice shape as a whole. An edge is covered by the anti-reflective film and a portion surrounded by the edge is exposed from the anti-reflective film in each of the plurality of radio-wave reflecting devices. A frequency of the radio waves is equal to or greater than 400 MHz and equal to or less than 50 GHz, for example.Type: ApplicationFiled: August 14, 2024Publication date: December 5, 2024Applicant: Japan Display Inc.Inventors: Shigesumi ARAKI, Shinichiro OKA, Mitsutaka OKITA, Daiichi SUZUKI
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Patent number: 12147130Abstract: According to one embodiment, in a display device a first panel includes a first polarizing plate, a second polarizing plate, and a first liquid crystal panel interposed between the first polarizing plate and the second polarizing plate, a second panel includes a third polarizing plate, a fourth polarizing plate, and a second liquid crystal panel interposed between the third polarizing plate and the fourth polarizing plat, and a polarizing plate, which is located second from a surface close to an illumination device and a surface closest to an observer, has an extinction ratio that is lower than that of each of the other polarizing plates.Type: GrantFiled: October 25, 2022Date of Patent: November 19, 2024Assignee: JAPAN DISPLAY INC.Inventors: Kazunari Tomizawa, Tsutomu Harada, Junji Kobashi, Shinichiro Oka, Yosuke Hyodo
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Publication number: 20240377681Abstract: According to one embodiment, an alignment processing device includes a light source, a polarizing beam splitter, a first optical system, a second optical system, a first retardation film, a second retardation film, a moving mechanism configured to move a processing substrate in which a thin film is formed, and a controller. Interfering light is formed in an exposure area by first circularly polarized light and second circularly polarized light. The controller performs control so as to repeat a process of exposing part of an area of the thin film by the interfering light and a process of moving the processing substrate.Type: ApplicationFiled: May 10, 2024Publication date: November 14, 2024Applicants: Japan Display Inc., OSAKA UNIVERSITYInventors: Koichi IGETA, Ayaka HIGUCHI, Junji KOBASHI, Yasushi TOMIOKA, Shinichiro OKA, Hiroyuki YOSHIDA
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Patent number: 12135457Abstract: According to one embodiment, a liquid crystal optical element includes an optical waveguide including a first main surface and a second main surface opposed to the first main surface, an alignment film disposed on the second main surface, a liquid crystal layer which overlaps the alignment film, which includes cholesteric liquid crystals, and which reflects at least part of light incident through the optical waveguide toward the optical waveguide, and a transparent first protective layer which overlaps the liquid crystal layer, and which is formed of a water-soluble polymer or a fluorine-based resin.Type: GrantFiled: February 2, 2024Date of Patent: November 5, 2024Assignees: Japan Display Inc., OSAKA UNIVERSITYInventors: Koichi Igeta, Shinichiro Oka, Yasushi Tomioka, Junji Kobashi, Hiroyuki Yoshida
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Publication number: 20240364008Abstract: A reflect array includes at least one common electrode arranged on an incident side of a radio wave, at least one bias electrode arranged to overlap a back side of the at least one common electrode, a bias signal line arranged on the back side of the at least one common electrode and connected to the at least one bias electrode, and a liquid crystal layer between the at least one common electrode and the at least one bias electrode. The at least one common electrode is at a constant potential, and a bias voltage is applied to the at least one bias electrode via the bias signal line to change the dielectric constant of the liquid crystal layer.Type: ApplicationFiled: July 9, 2024Publication date: October 31, 2024Applicants: Japan Display Inc., TOHOKU UNIVERSITYInventors: Mitsutaka OKITA, Shigesumi ARAKI, Shinichiro OKA, Daiichi SUZUKI, Qiang CHEN, Hiroyasu SATO, Hideo FUJIKAKE
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Publication number: 20240361505Abstract: A manufacturing method of a liquid crystal optical element includes preparing a liquid crystal film having a cholesteric liquid crystal, preparing a transparent substrate in which at least a material forming a main surface is an inorganic material, applying a solution containing a silane coupling agent to the main surface of the transparent substrate, stacking the liquid crystal film on the silane coupling agent, and heating the silane coupling agent.Type: ApplicationFiled: April 25, 2024Publication date: October 31, 2024Applicant: Japan Display Inc.Inventors: Koichi IGETA, Yasushi TOMIOKA, Hiroumi KINJO, Shinichiro OKA
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Patent number: 12124137Abstract: According to one embodiment, a display device includes a first display panel, a second display panel and an adhesive layer. The first display panel includes a first substrate with a first terminal area in which a first terminal part is formed, and a second substrate which is opposed to the first substrate and has a thickness different from that of the first substrate. The second display panel includes a third substrate with a second terminal area in which a second terminal part is formed, and a fourth substrate which is opposed to the third substrate and has a thickness different from that of the third substrate. The first terminal area and the second terminal area do not overlap with each other in a plan view.Type: GrantFiled: July 20, 2022Date of Patent: October 22, 2024Assignee: Japan Display Inc.Inventors: Yosuke Hyodo, Shinichiro Oka, Toshiharu Matsushima
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Patent number: 12124145Abstract: According to one embodiment, a method of manufacturing a liquid crystal element, includes forming an alignment layer on a support, forming a cholesteric liquid crystal layer containing a plasticizer and having elasticity on the alignment layer, adhering a flexible substrate to the cholesteric liquid crystal layer via a first adhesive layer, peeling the cholesteric liquid crystal layer adhered to the flexible substrate, off from the support and the alignment layer, adhering the cholesteric liquid crystal layer to a rigid substrate via a second adhesive layer and removing the flexible substrate and the first adhesive layer.Type: GrantFiled: July 31, 2023Date of Patent: October 22, 2024Assignee: Japan Display Inc.Inventors: Hiroumi Kinjo, Koichi Igeta, Shinichiro Oka