Patents by Inventor Isa Nishiyama
Isa Nishiyama 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: 11275273Abstract: An optical device (10) includes a first substrate (11) and a second substrate (12) facing each other, a liquid crystal component (13) between the first substrate (11) and the second substrate (12), a first electrode (18) and a second electrode (19) located on the first substrate (11) on the second substrate (12) side, and a first alignment layer (14) that is located on the first substrate (11) on the second substrate (12) side and controls the alignment state of liquid crystal molecules in the liquid crystal component (13), wherein an interface between the liquid crystal component (13) and the first alignment layer (14) forms a non-glide weak anchoring interface (17).Type: GrantFiled: August 16, 2019Date of Patent: March 15, 2022Assignees: KYOTO UNIVERSITY, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, SHARP KABUSHIKI KAISHA, DIC CORPORATIONInventors: Jun Yamamoto, Koki Takamoto, Takeaki Araki, Waki Sakatsuji, Hirotsugu Kikuchi, Yasushi Okumura, Koji Fujikawa, Yu Fukunaga, Kiyoshi Minoura, Koji Murata, Isa Nishiyama, Koichi Endo
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Publication number: 20210191170Abstract: An optical device (10) includes a first substrate (11) and a second substrate (12) facing each other, a liquid crystal component (13) between the first substrate (11) and the second substrate (12), a first electrode (18) and a second electrode (19) located on the first substrate (11) on the second substrate (12) side, and a first alignment layer (14) that is located on the first substrate (11) on the second substrate (12) side and controls the alignment state of liquid crystal molecules in the liquid crystal component (13), wherein an interface between the liquid crystal component (13) and the first alignment layer (14) forms a non-glide weak anchoring interface (17).Type: ApplicationFiled: August 16, 2019Publication date: June 24, 2021Applicants: Kyoto University, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Sharp Kabushiki Kaisha, DIC CorporationInventors: Jun Yamamoto, Koki Takamoto, Takeaki Araki, Waki Sakatsuji, Hirotsugu Kikuchi, Yasushi Okumura, Koji Fujikawa, Yu Fukunaga, Kiyoshi Minoura, Koji Murata, Isa Nishiyama, Koichi Endo
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Patent number: 10914987Abstract: A complex (10) includes a liquid crystal component (13) and a support (11, 12) of the liquid crystal component (13), in which a lubricating interface derivation region (16) is formed between the liquid crystal component (13) and the support (11, 12). An optical element includes a pair of substrates (11, 12) having electrodes (18, 19) on at least one substrate (11), and a liquid crystal component (13) with which a space between the pair of substrates (11, 12) is filled, in which a lubricating interface derivation region (16) is formed between the pair of substrates (11, 12) and the liquid crystal component (13). It is preferable that the lubricating interface deriving agent (14) is present in the lubricating interface derivation region.Type: GrantFiled: August 26, 2016Date of Patent: February 9, 2021Assignees: KYOTO UNIVERSITY, KYUSHU UNIVERSITY, NAT'L UNIVERSITY CORPORATION, SHARP KABUSHIKI KAISHA, DIC CORPORATIONInventors: Jun Yamamoto, Masumi Yamashita, Waki Sakatsuji, Yoichi Takanishi, Shogo Kato, Hirotsugu Kikuchi, Yasushi Okumura, Hiroki Higuchi, Rijeesh Kizhakidathazhath, Takahito Kanzaki, Yudai Kawashima, Gimpei Machida, Hiroya Nishikawa, Koichi Miyachi, Kiyoshi Minoura, Isa Nishiyama
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Patent number: 10788715Abstract: A photo-alignment material in which an alignment film can be formed parallel to a vibration direction of light and a tilt angle of the alignment film is easily controlled and a photo-alignment method using the photo-alignment material are provided. A photo-alignment material of the present invention contains a photo-responsive substance having a threshold value of responding light intensity.Type: GrantFiled: November 20, 2018Date of Patent: September 29, 2020Assignees: TOKYO INSTITUTE OF TECHNOLOGY, DIC CORPORATIONInventors: Motoi Kinoshita, Atsushi Shishido, Isa Nishiyama
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Publication number: 20200241336Abstract: A complex (10) includes a liquid crystal component (13) and a support (11, 12) of the liquid crystal component (13), in which a lubricating interface derivation region (16) is formed between the liquid crystal component (13) and the support (11, 12). An optical element includes a pair of substrates (11, 12) having electrodes (18, 19) on at least one substrate (11), and a liquid crystal component (13) with which a space between the pair of substrates (11, 12) is filled, in which a lubricating interface derivation region (16) is formed between the pair of substrates (11, 12) and the liquid crystal component (13). It is preferable that the lubricating interface deriving agent (14) is present in the lubricating interface derivation region.Type: ApplicationFiled: August 26, 2016Publication date: July 30, 2020Applicants: Kyoto University, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Sharp Kabushiki Kaisha, DIC CorporationInventors: Jun Yamamoto, Masumi Yamashita, Waki Sakatsuji, Yoichi Takanishi, Shogo Kato, Hirotsugu Kikuchi, Yasushi Okumura, Hiroki Higuchi, Rijeesh Kizhakidathazhath, Takahito Kanzaki, Yudai Kawashima, Gimpei Machida, Hiroya Nishikawa, Koichi Miyachi, Kiyoshi Minoura, Isa Nishiyama
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Publication number: 20190086738Abstract: A photo-alignment material in which an alignment film can be formed parallel to a vibration direction of light and a tilt angle of the alignment film is easily controlled and a photo-alignment method using the photo-alignment material are provided. A photo-alignment material of the present invention contains a photo-responsive substance having a threshold value of responding light intensity.Type: ApplicationFiled: November 20, 2018Publication date: March 21, 2019Applicants: TOKYO INSTITUTE OF TECHNOLOGY, DIC CORPORATIONInventors: Motoi Kinoshita, Atsushi Shishido, Isa Nishiyama
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Publication number: 20180361326Abstract: The present invention aims to provide a gas-selective permeable membrane that has gas permeability and gas selectivity capable of highly separating a target gas from other gases, is less likely to be influenced by the temperature condition employed, and is excellent in strength and handleability. The invention uses at least one or more polymerizable compounds to provide a gas-selective permeable film that contains a polymer having an optically uniaxial or multiaxial molecular alignment and to provide a laminate including a gas-permeable substrate and the permeable membrane laminated thereon.Type: ApplicationFiled: November 8, 2016Publication date: December 20, 2018Applicant: DIC CorporationInventors: Yasuhiro Kuwana, Kouichi Endo, Isa Nishiyama, Susumu Matsuzaki, Yutaka Kadomoto
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Patent number: 10095066Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a compound represented by the general formula (I).Type: GrantFiled: May 31, 2016Date of Patent: October 9, 2018Assignee: DIC CORPORATIONInventors: Martin Schadt, Sayaka Nose, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu
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Publication number: 20180282625Abstract: Provided is a polymer which is capable of forming a liquid crystal alignment layer that combines an excellent alignment regulating force, high sensitivity with respect to polarized ultraviolet ray, and excellent durability. The polymer includes a side chain unit represented General Formula (I) and a side chain unit represented by General Formula (II), in which a polyamic acid or a polyimide is set as a main chain.Type: ApplicationFiled: October 13, 2016Publication date: October 4, 2018Applicant: DIC CorporationInventors: Martin Chadt, Fumiaki Kodera, Hiroyuki Itou, Haruyoshi Takatsu, Hiroshi Hasebe, Isa Nishiyama, Yoshitaka Saito
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Patent number: 10011773Abstract: The present invention relates to a liquid crystal display device that includes a particular color filter containing a material containing chiral liquid crystals and a particular dye and/or pigment. The present invention provides a liquid crystal display device that can prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and solve the problem of display defects, such as white spots, variations in alignment, and burn-in. Because liquid crystal display devices according to the present invention characteristically prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and reduces the occurrence of display defects, such as burn-in, the liquid crystal display devices are particularly useful as liquid crystal display devices in IPS mode and FFS mode for active-matrix driving and can be applied to household electrical appliances, automobiles, production facilities, measuring and analytical instruments, and communication devices.Type: GrantFiled: June 3, 2014Date of Patent: July 3, 2018Assignee: DIC CORPORATIONInventors: Hidenari Akiyama, Isa Nishiyama, Seiji Fanakura, Katsunori Shimada
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Patent number: 9939555Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a compound represented by the general formula (I).Type: GrantFiled: May 31, 2012Date of Patent: April 10, 2018Assignee: DIC CORPORATIONInventors: Martin Schadt, Sayaka Nose, Masayuki Iwakubo, Masanao Hayashi, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu
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Patent number: 9828548Abstract: There is provided a liquid crystal composition which enables a significant reduction in crystallization temperature as compared with addition of a homolog while having a similar skeleton structure, which has an excellent compatibility, and which enables an increase in the absolute value of negative dielectric anisotropy (??). The liquid crystal composition contains two or more compounds which each have two to four ring structures between two side chains. At least one of the ring structures is a 2,3-difluorobenzene skeleton. The two side chains are bonded to different ring structures. The positions of the 2,3-difluorobenzene skeletons are different from each other, and the number of the ring structures are the same as each other.Type: GrantFiled: June 5, 2013Date of Patent: November 28, 2017Assignee: DIC CORPORATIONInventors: Toru Fujisawa, Kazuaki Hatsusaka, Kazunori Maruyama, Isa Nishiyama
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Patent number: 9771517Abstract: The liquid crystal light modulator includes a first substrate (10) and a second substrate (20) disposed between two polarizers, and a pair of electrode structures (24, 24). The substrates include homeotropic alignment films (12) and (22), and at least one of the substrates has a function of aligning C-directors of liquid crystal molecules along one direction. The one direction forms an azimuth angle in the range of 35 to 55 degrees with the direction of the electric field generated by the pair of electrode structures (24, 24). A liquid crystal composition layer (31) contains a ferroelectric liquid crystal composition having a chiral smectic C phase or a liquid crystal composition that has an achiral smectic C phase and negative dielectric anisotropy. Light transmittance is modulated by the electric field generated by the electrode structures (24, 24) changing the birefringence index of the liquid crystal composition layer (31).Type: GrantFiled: June 5, 2013Date of Patent: September 26, 2017Assignee: DIC CORPORATIONInventors: Toru Fujisawa, Kazuaki Hatsusaka, Kazunori Maruyama, Isa Nishiyama
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Patent number: 9708535Abstract: An object of the present invention is to provide a photoalignment layer with a more reliable absorption anisotropy parameter as a photoalignment layer that allows for reduced AC image-sticking. Specifically, provided is a photoalignment layer, obtained by exposure to polarized UV radiation, that has a maximum ?A (=A1?A2, where A1 is the absorbance in a direction parallel to a vibration direction of the polarized UV radiation, and A2 is the absorbance in a direction parallel to the vibration direction of the polarized UV radiation) of 0.35 or more per micrometer of layer thickness in a range of 230 to 380 nm.Type: GrantFiled: May 26, 2015Date of Patent: July 18, 2017Assignee: DIC CORPORATIONInventors: Hiroshi Hasebe, Fumiaki Kodera, Masanao Takashima, Isa Nishiyama, Hiroyuki Itou, Yutaka Kadomoto, Kazuki Obi, Yoshitaka Saitou, Yuuichirou Tani, Keisuke Fujisawa
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Publication number: 20170190819Abstract: It is an object of the present invention to provide a polymerizable liquid crystal composition that has an excellent storage stability and that enables a film formed by application of the composition to a base material and the subsequent exposure to heat or active energy rays to have a good adhesion to the base material. It is another object of the present invention to provide an optically anisotropic body that is produced using such a polymerizable composition and that has a good orientation. In particular, the present invention provides a polymerizable liquid crystal composition containing a polymerizable adhesion enhancer and a polymerizable liquid crystal compound. In addition, the present invention also provides an optically anisotropic body containing such a polymerizable liquid crystal composition.Type: ApplicationFiled: June 16, 2015Publication date: July 6, 2017Applicant: DIC CorporationInventors: Kouichi Endo, Yasuhiro Kuwana, Hidetoshi Nakata, Mika Yamamoto, Kazuaki Hatsusaka, Isa Nishiyama
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Patent number: 9684206Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a polymer represented by the general formula (I).Type: GrantFiled: June 27, 2012Date of Patent: June 20, 2017Assignee: DIC CORPORATIONInventors: Martin Schadt, Vladimir Grigorievich Chigrinov, Hoi-Sing Kwok, Sayaka Nose, Masayuki Iwakubo, Masanao Hayashi, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu
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Publication number: 20170088777Abstract: An object of the present invention is to provide a photoalignment layer with a more reliable absorption anisotropy parameter as a photoalignment layer that allows for reduced AC image-sticking. Specifically, provided is a photoalignment layer, obtained by exposure to polarized UV radiation, that has a maximum ?A (=A1?A2, where A1 is the absorbance in a direction parallel to a vibration direction of the polarized UV radiation, and A2 is the absorbance in a direction parallel to the vibration direction of the polarized UV radiation) of 0.35 or more per micrometer of layer thickness in a range of 230 to 380 nm.Type: ApplicationFiled: May 26, 2015Publication date: March 30, 2017Applicant: DIC CORPORATIONInventors: Hiroshi Hasebe, Fumiaki Kodera, Masanao Takashima, Isa Nishiyama, Hiroyuki Itou, Yutaka Kadomoto, Kazuki Obi, Yoshitaka Saitou, Yuuichirou Tani, Keisuke Fujisawa
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Publication number: 20160349540Abstract: Provided is a light modulation element which is unlikely to cause photolysis or photodecomposition. Provided is a light modulation element formed of at least one or more transparent substrates and a dielectric layer stacked on at least one transparent substrate, in which the dielectric layer contains from 90 mol % to 100 mol % of an external field-reactive substance, and an energy level (T1) of a lowest triplet excited state of the external field-reactive substance is from 2.6 eV to 5.4 eV. It is preferable that the external field-reactive substance contains from 35 mol % to 85 mol % of an external field-reactive substance (A-1) in which a value of S1-T1 is from 1.0 eV to 2.0 eV, when an energy level of an excited singlet of the external field-reactive substance (A) is set as (S1).Type: ApplicationFiled: February 12, 2015Publication date: December 1, 2016Applicant: DIC CORPORATIONInventors: Tomiki Ikeda, Joji Kawamura, Isa Nishiyama, Yutaka Tachikawa, Yoshinori Iwashita
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Patent number: 9469810Abstract: The present invention relates to a polymerizable composition useful as a liquid crystal device, a display, an optical member, a coloring agent, a security marking, and a laser light emitting member and a thin film obtained from the polymerizable composition. The present invention provides a polymerizable liquid crystal composition having excellent solubility into a solvent, exhibiting good adhesion to a base material, and being capable of realizing a thin film having low haze and no variations and, in addition, provides a thin film having excellent appearance by using the polymerizable liquid crystal composition. The polymerizable liquid crystal composition according to the present invention is used and, thereby, a composition and a thin film having low haze and no variations and, at the same time, having excellent adhesion to a base material can be obtained at a low cost.Type: GrantFiled: November 21, 2012Date of Patent: October 18, 2016Assignee: DIC CORPORATIONInventors: Hidetoshi Nakata, Yasuhiro Kuwana, Hiroshi Hasebe, Kunihiko Kotani, Isa Nishiyama
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Publication number: 20160274418Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a compound represented by the general formula (I).Type: ApplicationFiled: May 31, 2016Publication date: September 22, 2016Applicant: DIC CORPORATIONInventors: Martin Schadt, Sayaka Nose, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu