Patents by Inventor Masanao Takashima
Masanao Takashima 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: 20240327578Abstract: Provided are a novel silicone-based polymer compound with excellent mechanical properties and a silicone-based polymer material containing the silicone-based polymer compound. The silicone-based polymer compound of the present invention is a silicone-based polymer compound (H) having a polysiloxane backbone as the main chain, wherein the polysiloxane backbone has at least one host group in a side chain, and the host group is a monovalent group formed by removing one hydrogen atom or one hydroxy group from a cyclodextrin or a cyclodextrin derivative.Type: ApplicationFiled: July 21, 2022Publication date: October 3, 2024Applicants: OSAKA UNIVERSITY, SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yoshinori Takashima, Akira Harada, Motofumi Osaki, Junsu Park, Daichi Yoshida, Hideo Nakagawa, Minoru Igarashi, Nobu Kato, Masanao Kamei, Kentaro Ogura
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Publication number: 20220057672Abstract: The present invention relates to a liquid crystal composition for a light-scattering liquid crystal device shown in FIG. 1 containing a polymerizable compound selected from the group consisting of compounds represented by the following general formula (1) as a first component and containing a compound having a negative dielectric anisotropy as a second component, a light-scattering liquid crystal device using the liquid crystal composition, and a smart window using the light-scattering liquid crystal device. A reverse mode type light-scattering liquid crystal device can have excellent transparency when no voltage is applied and a reduced driving voltage by the liquid crystal composition of the present invention.Type: ApplicationFiled: July 18, 2019Publication date: February 24, 2022Applicant: DIC CorporationInventors: Masanao Takashima, Shinichi Hirata, Kazunori Maruyama, Toru Fujisawa, Kazuaki Hatsusaka, Hidetoshi Nakata
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Patent number: 10738242Abstract: A compound and a polymer which can each form a photo-alignment film having excellent ability of controlling alignment, a photo-alignment film obtained using the polymer and an optically anisotropic body and a liquid crystal display element each having the photo-alignment film are provided. A compound represented by the general formula (1). In the formula, P represents a polymerizable group, Z and Z1 represent divalent linking groups, A and A1 represent divalent cyclic groups, and X1 to X5 each independently represent a hydrogen atom, a fluorine atom, a chlorine atom, a hydroxy group, a nitro group, a cyano group or an alkyl group having 1 to 40 carbon atoms which may have a substituent, provided that X1, X2, X4 and X5 are not simultaneously hydrogen atoms.Type: GrantFiled: April 16, 2018Date of Patent: August 11, 2020Assignee: DIC CORPORATIONInventors: Fumiaki Kodera, Yoshitaka Saito, Hiroshi Hasebe, Masanao Takashima, Shuuhei Yamamoto, Kouzi Satou, Sayaka Nose, Kazuki Obi, Hiroyuki Itou
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Patent number: 10437107Abstract: An object of the present invention is to provide a liquid-crystal display element using a liquid-crystal composition having negative dielectric anisotropy, capable of realizing excellent display characteristics by being used in a liquid-crystal display element provided with a photo-alignment film, without deteriorating various characteristics as a liquid-crystal display element such as dielectric anisotropy, viscosity, a nematic phase upper limit temperature, nematic phase stability at low temperatures, and ?1, and burn-in characteristics of a display element. A liquid-crystal display element using a liquid-crystal composition containing at least one compound selected from the group consisting of compounds represented by the following General Formula (I) is provided.Type: GrantFiled: October 29, 2014Date of Patent: October 8, 2019Assignee: DIC CORPORATIONInventors: Yoshinori Iwashita, Shinji Ogawa, Hiroshi Hasebe, Masanao Takashima
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Patent number: 10423033Abstract: [Problem] The purpose of the present invention is to provide a method for developing a large anchoring energy by simple processes. [Solution] There is provided a method for manufacturing a liquid crystal alignment film, comprising: a process (I) of mixing a solvent with a photoresponsive polymer to prepare a photoresponsive polymer solution; a process (II) of coating the photoresponsive polymer solution on a substrate, followed by drying at 50 to 100° C. for 1 to 3 minutes and then drying at 120° C. to 180° C. for 5 to 75 minutes to form a coating film; and a process (III) of adjusting a temperature of the coating film while the coating film is irradiated with a light of 200 to 350 nm to 40° C. to 100° C.Type: GrantFiled: September 30, 2014Date of Patent: September 24, 2019Assignee: DIC CORPORATIONInventors: Fumiaki Kodera, Kunihiko Kotani, Kazunori Maruyama, Yutaka Kadomoto, Masanao Takashima, Hiroshi Hasebe, Yoshitaka Saito
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Patent number: 10108052Abstract: An object of the present invention is to provide a liquid-crystal display element using a liquid-crystal composition having negative dielectric anisotropy, capable of realising excellent display characteristics by being used in an FFS mode liquid-crystal display element, without deteriorating various characteristics as a liquid-crystal display element such as dielectric anisotropy, viscosity, a nematic phase upper limit temperature, nematic phase stability at low temperatures, and ?1, and burn-in characteristics of a display element.Type: GrantFiled: October 29, 2014Date of Patent: October 23, 2018Assignee: DIC CORPORATIONInventors: Yoshinori Iwashita, Shinji Ogawa, Hiroshi Hasebe, Masanao Takashima
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Publication number: 20180230385Abstract: A compound and a polymer which can each form a photo-alignment film having excellent ability of controlling alignment, a photo-alignment film obtained using the polymer and an optically anisotropic body and a liquid crystal display element each having the photo-alignment film are provided. A compound represented by the general formula (1). In the formula, P represents a polymerizable group, Z and Z1 represent divalent linking groups, A and A1 represent divalent cyclic groups, and X1 to X5 each independently represent a hydrogen atom, a fluorine atom, a chlorine atom, a hydroxy group, a nitro group, a cyano group or an alkyl group having 1 to 40 carbon atoms which may have a substituent, provided that X1, X2, X4 and X5 are not simultaneously hydrogen atoms.Type: ApplicationFiled: April 16, 2018Publication date: August 16, 2018Applicant: DIC CorporationInventors: Fumiaki Kodera, Yoshitaka Saito, Hiroshi Hasebe, Masanao Takashima, Shuuhei Yamamoto, Kouzi Satou, Sayaka Nose, Kazuki Obi, Hiroyuki Itou
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Publication number: 20180037680Abstract: The invention provides an acrylic resin-based transparent substrate having an alignment layer spread thereon, wherein the photo-alignment layer and the substrate are kept tightly bonded to each other. The invention also provides a layered body having an acrylic resin-containing transparent substrate and, as formed on one surface of the transparent substrate by spreading and bonding thereto, a photo-alignment layer containing photo-responsive molecules capable of responding to light. According to the invention, there can be provided an acrylic resin-based transparent substrate having on the surface thereof, a photo-alignment layer having excellent adhesion force and containing photo-responsive molecules capable of responding to light.Type: ApplicationFiled: September 29, 2015Publication date: February 8, 2018Applicant: DIC CorporationInventors: Yoshitaka Saito, Kazuki Obi, Hiroyuki Itou, Kouji Sato, Hiroshi Hasebe, Masanao Takashima, Fumiaki Kodera
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Publication number: 20170205669Abstract: The present inventors have made earnest investigations for enhancing the alignment regulation force of the alignment film, and as a result, it has been found that the alignment regulation force can be easily achieved by controlling the yellowness index (YI) of the alignment film to a certain value or more, and thus has been found that the problems can be solved by the following invention. An image display device containing an image display part containing a liquid crystal layer containing a liquid crystal compound regulating a phase or a velocity of transmitted light, and in contact with the liquid crystal layer, a photo alignment layer regulating alignment of liquid crystal molecules contained in the liquid crystal compound, the alignment layer having a yellowness index (YI) of 0.001<YI<100.Type: ApplicationFiled: May 21, 2015Publication date: July 20, 2017Applicant: DIC CorporationInventors: Yoshiyuki Ono, Kunihiko Kotani, Kazunori Maruyama, Hiroshi Hasebe, Masanao Takashima, Shirou Taniguchi, Fumiaki Kodera
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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: 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: 20160349574Abstract: An object of the present invention is to provide a liquid-crystal display element using a liquid-crystal composition having negative dielectric anisotropy, capable of realizing excellent display characteristics by being used in a liquid-crystal display element provided with a photo-alignment film, without deteriorating various characteristics as a liquid-crystal display element such as dielectric anisotropy, viscosity, a nematic phase upper limit temperature, nematic phase stability at low temperatures, and ?1, and burn-in characteristics of a display element. A liquid-crystal display element using a liquid-crystal composition containing at least one compound selected from the group consisting of compounds represented by the following General Formula (I) is provided.Type: ApplicationFiled: October 29, 2014Publication date: December 1, 2016Applicant: DIC CorporationInventors: Yoshinori Iwashita, Shinji Ogawa, Hiroshi Hasebe, Masanao Takashima
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Publication number: 20160306236Abstract: An object of the present invention is to provide a liquid-crystal display element using a liquid-crystal composition having negative dielectric anisotropy, capable of realising excellent display characteristics by being used in an FFS mode liquid-crystal display element, without deteriorating various characteristics as a liquid-crystal display element such as dielectric anisotropy, viscosity, a nematic phase upper limit temperature, nematic phase stability at low temperatures, and ?1, and burn-in characteristics of a display element.Type: ApplicationFiled: October 29, 2014Publication date: October 20, 2016Applicant: DIC CorporationInventors: Yoshinori Iwashita, Shinji Ogawa, Hiroshi Hasebe, Masanao Takashima
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Publication number: 20160231626Abstract: [Problem] The purpose of the present invention is to provide a method for developing a large anchoring energy by simple processes. [Solution] There is provided a method for manufacturing a liquid crystal alignment film, comprising: a process (I) of mixing a solvent with a photoresponsive polymer to prepare a photoresponsive polymer solution; a process (II) of coating the photoresponsive polymer solution on a substrate, followed by drying at 50 to 100° C. for 1 to 3 minutes and then drying at 120° C. to 180° C. for 5 to 75 minutes to form a coating film; and a process (III) of adjusting a temperature of the coating film while the coating film is irradiated with a light of 200 to 350 nm to 40° C. to 100° C.Type: ApplicationFiled: September 30, 2014Publication date: August 11, 2016Applicant: DIC CORPORATIONInventors: Fumiaki Kodera, Kunihiko Kotani, Kazunori Maruyama, Yutaka Kadomoto, Masanao Takashima, Hiroshi Hasebe, Yoshitaka Saito
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Patent number: 8497953Abstract: Provided is a prism sheet which has high effects of suppressing Moiré fringes, high front luminance and reduced number of components when it is used as a prism sheet for a backlight unit for a liquid crystal display device. The prism sheet has a prism row having ridges formed in parallel to each other at equivalent intervals on one surface and a light diffusion layer containing porous particles on the other surface. The prism sheet preferably has the prism row on one surface and the light diffusion layer on the other surface by having a light-transmissive substrate in between.Type: GrantFiled: August 25, 2008Date of Patent: July 30, 2013Assignee: DIC CorporationInventors: Masashi Miyamoto, Masanao Takashima, Ryuichi Saga
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Publication number: 20100245717Abstract: Provided is a prism sheet which has high effects of suppressing Moiré fringes, high front luminance and reduced number of components when it is used as a prism sheet for a backlight unit for a liquid crystal display device. The prism sheet has a prism row having ridges formed in parallel to each other at equivalent intervals on one surface and a light diffusion layer containing porous particles on the other surface. The prism sheet preferably has the prism row on one surface and the light diffusion layer on the other surface by having a light-transmissive substrate in between.Type: ApplicationFiled: August 25, 2008Publication date: September 30, 2010Applicant: DIC CORPORATIONInventors: Masashi Miyamoto, Masanao Takashima, Ryuichi Saga