Patents by Inventor Masayuki Iwakubo
Masayuki Iwakubo 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: 20200071617Abstract: “Object” To provide a tilt-imparted liquid crystal display element that is obtained through UV irradiation of a polymerizable liquid crystal composition, whose drive voltage can be reduced with a fast decay time maintained, and that is well balanced between characteristics, such as decay time, drive voltage, and transmittance. A polymerizable liquid crystal composition for use in it is also provided. “Solution” A liquid crystal display element has polymer networks formed in the liquid crystal phase 5 in FIG. 3. The polymer networks are formed by polymerizing a polymerizable liquid crystal composition that contains, as essential ingredients, a radically polymerizable monomer component (A), a liquid crystal material (B), and a polymerization initiator (C) that has a molecular structure resulting from substituting any two or more hydrogen atoms in the aromatic nucleus in the molecular structure of an alkylphenone-based photopolymerization initiator, for example with a C1-10 alkyl group (i).Type: ApplicationFiled: September 26, 2017Publication date: March 5, 2020Applicant: DIC CorporationInventors: Toru Fujisawa, Masayuki Iwakubo, Hiroshi Hasebe, Fumiaki Kodera, Keumhee Jang
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Patent number: 10336939Abstract: Provided are a compound represented by general formula (I), a liquid crystal composition that uses the compound, and a liquid crystal display device that uses the liquid crystal composition. Adding the compound represented by general formula (I) to a liquid crystal composition can prevent degradation of the liquid crystal composition by light, heat, etc. The compound represented by general formula (I) dissolves well in the liquid crystal composition. Thus, when the compound represented by general formula (I) is used, a liquid crystal composition having both low viscosity (?) and high reliability can be prepared, and a high-speed response liquid crystal display device can be provided.Type: GrantFiled: June 23, 2016Date of Patent: July 2, 2019Assignee: DIC CORPORATIONInventors: Masayuki Iwakubo, Sayaka Nose, Manabu Takachi, Yoshio Aoki
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Publication number: 20180223188Abstract: Provided are a compound represented by general formula (I), a liquid crystal composition that uses the compound, and a liquid crystal display device that uses the liquid crystal composition. Adding the compound represented by general formula (I) to a liquid crystal composition can prevent degradation of the liquid crystal composition by light, heat, etc. The compound represented by general formula (I) dissolves well in the liquid crystal composition. Thus, when the compound represented by general formula (I) is used, a liquid crystal composition having both low viscosity (?) and high reliability can be prepared, and a high-speed response liquid crystal display device can be provided.Type: ApplicationFiled: June 23, 2016Publication date: August 9, 2018Applicant: DIC CorporationInventors: Masayuki Iwakubo, Sayaka Nose, Manabu Takachi, Yoshio Aoki
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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: 9688787Abstract: An object of the invention is to provide a polymerizable compound having small refractive index anisotropy and having high storage stability and high alignment properties when constituting a polymerizable liquid crystal composition, and provide a polymerizable liquid crystal composition containing the polymerizable compound. Further, the object is to provide a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer. The present invention provides a polymerizable compound represented by general formula (I), a polymerizable liquid crystal composition containing the compound as a constituent component, and further provides a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer.Type: GrantFiled: August 14, 2015Date of Patent: June 27, 2017Assignee: DIC CORPORATIONInventors: Tetsuo Kusumoto, Masahiro Horiguchi, Takashi Matsumoto, Yoshio Aoki, Masanao Hayashi, Masayuki Iwakubo
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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: 20150361190Abstract: An object of the invention is to provide a polymerizable compound having small refractive index anisotropy and having high storage stability and high alignment properties when constituting a polymerizable liquid crystal composition, and provide a polymerizable liquid crystal composition containing the polymerizable compound. Further, the object is to provide a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer. The present invention provides a polymerizable compound represented by general formula (I), a polymerizable liquid crystal composition containing the compound as a constituent component, and further provides a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer.Type: ApplicationFiled: August 14, 2015Publication date: December 17, 2015Applicant: DIC CORPORATIONInventors: Tetuo Kusumoto, Masahiro Horiguchi, Takashi Matsumoto, Yoshio Aoki, Masanao Hayashi, Masayuki Iwakubo
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Patent number: 9120883Abstract: An object of the invention is to provide a polymerizable compound having small refractive index anisotropy and having high storage stability and high alignment properties when constituting a polymerizable liquid crystal composition, and provide a polymerizable liquid crystal composition containing the polymerizable compound. Further, the object is to provide a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer. The present invention provides a polymerizable compound represented by general formula (I), a polymerizable liquid crystal composition containing the compound as a constituent component, and further provides a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer.Type: GrantFiled: April 5, 2012Date of Patent: September 1, 2015Assignee: DIC CORPORATIONInventors: Tetuo Kusumoto, Masahiro Horiguchi, Takashi Matsumoto, Yoshio Aoki, Masanao Hayashi, Masayuki Iwakubo
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Publication number: 20140221574Abstract: Provided is a liquid crystal alignment layer of which a constituent member is a polymer represented by the general formula (I).Type: ApplicationFiled: June 27, 2012Publication date: August 7, 2014Applicant: 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: 20140121345Abstract: 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, 2012Publication date: May 1, 2014Applicant: DIC CORPORATIONInventors: Martin Schadt, Sayaka Nose, Masayuki Iwakubo, Masanao Hayashi, Yutaka Nagashima, Isa Nishiyama, Haruyoshi Takatsu
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Publication number: 20140080990Abstract: An object of the invention is to provide a polymerizable compound having small refractive index anisotropy and having high storage stability and high alignment properties when constituting a polymerizable liquid crystal composition, and provide a polymerizable liquid crystal composition containing the polymerizable compound. Further, the object is to provide a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer. The present invention provides a polymerizable compound represented by general formula (I), a polymerizable liquid crystal composition containing the compound as a constituent component, and further provides a polymer produced by polymerizing the polymerizable liquid crystal composition and an optically anisotropic body including the polymer.Type: ApplicationFiled: April 5, 2012Publication date: March 20, 2014Applicant: DIC CORPORATIONInventors: Tetuo Kusumoto, Masahiro Horiguchi, Takashi Matsumoto, Yoshio Aoki, Masanao Hayashi, Masayuki Iwakubo
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Patent number: 7670504Abstract: The present invention provides a liquid crystal composition having a negative dielectric anisotropy whose absolute value is large, and a low viscosity, and also provides a VA type liquid crystal element using the same. Disclosed is a liquid crystal composition containing a compound represented by the general formula (I) and an alkenyl compound represented by the general formula (II): By combining the liquid compounds according to the present invention, a liquid crystal composition having a low viscosity and a negative dielectric anisotropy could be obtained while nearly maintaining physical properties such as refractive anisotropy. By using the composition, a liquid crystal element having excellent reliability, capable of maintaining a high voltage retention until a high temperature region, is provided, and the display is very applicable as a VA type, ECB type, or IPS type liquid crystal display, and is particularly effective for speeding up response without thinning cell gaps.Type: GrantFiled: December 14, 2005Date of Patent: March 2, 2010Assignee: Dainippon Ink & Chemicals, Inc.Inventors: Shotaro Kawakami, Takashi Matsumoto, Tetsuo Kusumoto, Yoshitaka Saito, Yutaka Nagashima, Makoto Negishi, Masayuki Iwakubo
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Patent number: 7651630Abstract: A nematic liquid crystal composition of the present invention includes 10 to 80% by mass of either one or at least two compounds represented by general formula (I) as a first component; and 20 to 70% by mass of either one or at least two compounds represented by general formula (II) as a second component, wherein a dielectric constant anisotropy is negative. The use of this nematic liquid crystal composition can provide a highly reliable liquid crystal display element capable of maintaining a high voltage-holding ratio even in a high temperature region, and achieving quick responsiveness without reducing the cell gap.Type: GrantFiled: February 27, 2006Date of Patent: January 26, 2010Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Shotaro Kawakami, Takashi Matsumoto, Tetsuo Kusumoto, Yoshitaka Saito, Yutaka Nagashima, Makoto Negishi, Masayuki Iwakubo
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Patent number: 7615564Abstract: An objective of the present invention is to provide compounds having Rho kinase inhibitory activity and useful for the treatment of diseases mediated by Rho kinase. The compounds according to the present invention are those represented by formula (I) or pharmaceutically acceptable salts or solvates thereof: wherein Q represents phenyl, pyridyl, pyrrolyl, thienyl, or furyl; these groups are optionally substituted by one or two halogens or alkyl, nitro, or amino groups; and p is 2 or 3.Type: GrantFiled: September 12, 2003Date of Patent: November 10, 2009Assignee: Kirin Beer Kabushiki KaishaInventors: Masayuki Iwakubo, Yuji Okada
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Publication number: 20090050843Abstract: A nematic liquid crystal composition of the present invention includes 10 to 80% by mass of either one or at least two compounds represented by general formula (I) as a first component; and 20 to 70% by mass of either one or at least two compounds represented by general formula (II) as a second component, wherein a dielectric constant anisotropy is negative. The use of this nematic liquid crystal composition can provide a highly reliable liquid crystal display element capable of maintaining a high voltage-holding ratio even in a high temperature region, and achieving quick responsiveness without reducing the cell gap.Type: ApplicationFiled: February 27, 2006Publication date: February 26, 2009Applicant: DAINIPPON INK AND CHEMICALS, INC.Inventors: Shotaro Kawakami, Takashi Matsumoto, Tetsuo Kusumoto, Yoshitaka Saito, Yutaka Nagashima, Makoto Negishi, Masayuki Iwakubo
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Publication number: 20080111107Abstract: The present invention provides a liquid crystal composition having a negative dielectric anisotropy whose absolute value is large, and a low viscosity, and also provides a VA type liquid crystal element using the same. Disclosed is a liquid crystal composition containing a compound represented by the general formula (I) and an alkenyl compound represented by the general formula (II): By combining the liquid compounds according to the present invention, a liquid crystal composition having a low viscosity and a negative dielectric anisotropy could be obtained while nearly maintaining physical properties such as refractive anisotropy. By using the composition, a liquid crystal element having excellent reliability, capable of maintaining a high voltage retention until a high temperature region, is provided, and the display is very applicable as a VA type, ECB type, or IPS type liquid crystal display, and is particularly effective for speeding up response without thinning cell gaps.Type: ApplicationFiled: December 14, 2005Publication date: May 15, 2008Inventors: Shotaro Kawakami, Takashi Matsumoto, Tetsuo Kusumoto, Yoshitaka Saito, Yutaka Nagashima, Makoto Negishi, Masayuki Iwakubo
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Patent number: 7217722Abstract: An objective of the present invention is to provide compounds having Rho kinase inhibitory activity. The compounds according to the present invention are those represented by formula (I) or pharmaceutically acceptable salts or solvates thereof: Het—X—Z??(I) wherein Het represents a monocyclic or bicyclic heterocyclic group containing at least one nitrogen atom, for example, pyridyl or phthalimide; X represents group (i) —NH—C(?O)—NH—Q1-, group (ii) —NH—C(?O)—Q2-, wherein Q1 and Q2 represent a bond, alkylene, or alkenylene, or the like; and Z represents hydrogen, halogen, a monocyclic, bicyclic, or tricyclic carbocyclic group, a heterocyclic group or the like, for example, optionally substituted phenyl.Type: GrantFiled: January 2, 2001Date of Patent: May 15, 2007Assignee: Kirin Beer Kabushiki KaishaInventors: Atsuya Takami, Hiroshi Iijima, Masayuki Iwakubo, Yuji Okada
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Publication number: 20060167043Abstract: An objective of the present invention is to provide compounds having Rho kinase inhibitory activity and useful for the treatment of diseases mediated by Rho kinase. The compounds according to the present invention are those represented by formula (I) or pharmaceutically acceptable salts or solvates thereof: wherein Q represents phenyl, pyridyl, pyrrolyl, thienyl, or furyl; these groups are optionally substituted by one or two halogens or alkyl, nitro, or amino groups; and p is 2 or 3.Type: ApplicationFiled: September 12, 2003Publication date: July 27, 2006Applicant: KIRIN BEER KABUSHIKI KAISHAInventors: Masayuki Iwakubo, Yuji Okada
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Publication number: 20040102437Abstract: Compounds having an Rho kinase inhibitory activity. These compounds include the compound of general formula (I): Het-X-Z, pharmaceutically acceptable salts thereof and solvates of the same, wherein Het represents a monocyclic or dicyclic heterocycle group containing at least one nitrogen atom (for example, pyridyl, phthalimido); X represents (i) an —NH—C(═O)—NH-Q1- group, (ii) an —NH—C(═O)-Q2- group, etc. (wherein Q1 and Q2 represent each a bond, alkylene or alkenylene); and Z represents hydrogen, halogeno, a monocyclic, dicyclic ortricyclic carbon cycle or heterocycle, etc. (for example, optionally substituted phenyl).Type: ApplicationFiled: May 19, 2003Publication date: May 27, 2004Inventors: Atsuya Takami, Hiroshi Iijima, Masayuki Iwakubo, Yuji Okada