Patents by Inventor Yasuhiro Kuwana
Yasuhiro Kuwana 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: 9927625Abstract: The present invention provides a birefringent lens material for a stereoscopic image display, the birefringent lens material containing two or more liquid crystal compounds each having at least one polymerizable functional group, a birefringent lens for a stereoscopic image display, the birefringent lens being formed by using the lens material, and a method for producing a birefringent lens for a stereoscopic image display using the lens material. The birefringent lens material for a stereoscopic image display and the birefringent lens for a stereoscopic image display of the present invention are good in terms of optical characteristics, durability, and productivity, in particular, productivity. The method for producing a birefringent lens for a stereoscopic image display of the present invention has good productivity.Type: GrantFiled: December 20, 2011Date of Patent: March 27, 2018Assignee: DIC CORPORATIONInventors: Yasuhiro Kuwana, Hiroshi Hasebe
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Publication number: 20180066189Abstract: Provided are a polymerizable composition in which precipitation or the like of crystals does not occur and which has high storage stability; and a polymerizable composition in which unevenness is unlikely to occur when a film-like polymerized material obtained by polymerizing the composition is prepared. Further, provided are an optically anisotropic body, a retardation film, an optical compensation film, an anti-reflective film, a lens, and a lens sheet which are formed of the polymerizable composition, a liquid crystal display element, an organic light-emitting display element, a lighting element, an optical component, a colorant, a security marking, a member for emitting a laser, a polarizing film, a coloring material, and a printed matter for which the polymerizable composition is used.Type: ApplicationFiled: January 14, 2016Publication date: March 8, 2018Applicant: DIC CorporationInventors: Toru Ishii, Yasuhiro Kuwana, Masahiro Horiguchi, Yutaka Kadomoto, Tetsuo Kusumoto
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Publication number: 20180037817Abstract: The polymerizable composition prevents precipitation and the like of crystals and has high storage stability. A polymer compound is added to the polymerizable composition. In a case where a film-shaped polymer obtained by polymerizing the polymerizable composition is prepared, a tilt angle formed with an air interface is small, and glances of reflected light when a circularly polarizing plate is obtained by combining the polymer with a polarizing plate are removed. In addition, there is provided a polymer obtained by polymerizing the polymerizable composition, and an optically anisotropic body using the polymer. The polymerizable composition includes a reverse dispersible compound represented by General Formula (I), and a compound represented by General Formula (II).Type: ApplicationFiled: January 12, 2016Publication date: February 8, 2018Applicant: DIC CorporationInventors: Yasuhiro Kuwana, Masahiro Horiguchi, Toru Ishii, Sayaka Nose, Akihiro Koiso
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Publication number: 20180037819Abstract: The problem that the present invention is to solve is to provide an optical film that has less alignment defects and is less liable to cause variation in the optical characteristics when placed in a high temperature state. The present invention provides an optical film containing a structural unit derived from a specific compound, that is, an optical film containing a structural unit derived from a compound represented by the general formula (I), which has less alignment defects and is less liable to cause variation in the optical characteristics when placed in a high temperature state, and also provides a display device including the optical film.Type: ApplicationFiled: August 3, 2017Publication date: February 8, 2018Inventors: Masahiro HORIGUCHI, Sayaka NOSE, Yasuhiro KUWANA, Kouichi ENDO
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Publication number: 20180016502Abstract: The present invention provides a polymerizable composition containing: a) a polymerizable compound having one or two or more polymerizable groups and satisfying formula (I) Re(450 nm)/Re(550 nm)<1.0; and??(I) b) an organic solvent having a solubility parameter (SP value) of 8.50 to 11.00 (cal/cm3)0.5, a boiling point of 75 to 180° C., and an evaporation rate index of 20 to 700. The present invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable composition of the present invention. The polymerizable composition of the present invention is useful because it is excellent in solubility and has high storage stability that prevents the occurrence of precipitation of crystals. When the composition is polymerized to produce a film-shaped polymer, uneven application is less likely to occur while the liquid crystal alignment is maintained.Type: ApplicationFiled: January 14, 2016Publication date: January 18, 2018Applicant: DIC CorporationInventors: Kouichi Endo, Toru Ishii, Yasuhiro Kuwana, Kazuaki Hatsusaka, Mika Yamamoto
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Publication number: 20180002459Abstract: The present invention provides a polymerizable composition containing a specific polymerizable compound and a fluorosurfactant having a specific polyoxyalkylene skeleton and having specific molecular weight. The invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable composition of the present invention. The present invention is useful because, when an optically anisotropic body is produced by photo-polymerization of the polymerizable composition, three features including the leveling properties of the surface of the optically anisotropic body, offset onto the substrate, and liquid crystal alignment can be improved simultaneously.Type: ApplicationFiled: December 17, 2015Publication date: January 4, 2018Applicant: DIC CorporationInventors: Kouichi Endo, Toru Ishii, Yasuhiro Kuwana, Kazuaki Hatsusaka, Mika Yamamoto
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Publication number: 20180002460Abstract: The polymerizable composition contains: a) a polymerizable compound having one or two or more polymerizable groups and satisfying formula (I): Re(450 nm)/Re(550 nm)<1.0??(I); b) at least one photopolymerization initiator selected from the group consisting of alkylphenone-based compounds, acylphosphine oxide-based compounds, and oxime ester-based compounds; and c) a polymerization inhibitor. The present invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable liquid crystal composition. The polymerizable composition of the present invention is excellent in solubility and has high storage stability, so that no precipitation of crystals etc. occurs. When a film-shaped polymer is produced by polymerizing the above composition, the unevenness of the surface of the coating film is small while the alignment of the liquid crystal is maintained, and high durability is obtained.Type: ApplicationFiled: January 12, 2016Publication date: January 4, 2018Applicant: DIC CorporationInventors: Kouichi Endo, Toru Ishii, Yasuhiro Kuwana, Kazuaki Hatsusaka, Mika Yamamoto
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Publication number: 20170355907Abstract: The present invention provides a polymerizable liquid crystal composition including a specific polymerizable compound and a fluorosurfactant having specific polyoxyalkylene skeleton and molecular weight. Also, an optically anisotropic body, a phase difference film, an antireflection film, and a liquid crystal display device, which are produced by using the polymerizable liquid crystal composition according to the present invention, are provided. The present invention is useful because three properties, that is, leveling properties of the surface of an optically anisotropic body, offset to a base material, and alignment properties of a liquid crystal can be improved at the same time in the case where the optically anisotropic body is produced by photopolymerizing the polymerizable liquid crystal composition.Type: ApplicationFiled: December 10, 2015Publication date: December 14, 2017Applicant: DIC CorporationInventors: Kouichi Endo, Yasuhiro Kuwana, Hidetoshi Nakata, Mika Yamamoto, Kazuaki Hatsusaka
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Publication number: 20170190972Abstract: The present invention provides a liquid crystal display device that is free from a reduction in the voltage holding ratio (VHR) of the liquid crystal layer and an increase in ion density (ID) and that enables problems of defective display, such as white spots, uneven alignment, and image-sticking, to be eliminated. In particular, the present invention provides a liquid crystal display device in which a liquid crystal composition containing a liquid crystal compound having a specific structure is used in the liquid crystal layer and in which an optically anisotropic body formed through polymerization of a polymerizable liquid crystal composition containing a specific amount of a polymerizable liquid crystal compound having a specific structure is used as an in-cell retardation layer.Type: ApplicationFiled: July 14, 2015Publication date: July 6, 2017Inventors: Takeshi Kuriyama, Jouji Kawamura, Mika Yamamoto, Yasuhiro Kuwana
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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: 9676959Abstract: A polymerizable composition solution that has good storage stability and allows a polymerizable compound in the polymerizable composition to be aligned well with no defects after application to a base and removal of a solvent by a drying process and also an optically anisotropic body that includes the solution and has good alignment without any defects. A solution containing a polymerizable composition and an organic solvent, wherein the polymerizable composition contains 90 mass % or more of a polymerizable compound intramolecularly having a 2-methyl-1,4-phenylene group as represented by general formula (1) and an optically anisotropic body including the solution.Type: GrantFiled: May 23, 2014Date of Patent: June 13, 2017Assignee: DIC CORPORATIONInventors: Yasuhiro Kuwana, Hidetoshi Nakata, Koichi Endou, Mika Yamamoto, Kunihiko Kotani, Hiroshi Hasebe, Yoshiyuki Ono
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Patent number: 9599829Abstract: There is provided a method for producing a birefringent lens for a stereoscopic image display using a birefringent material having two or more liquid crystal compounds each having at least one polymerizable functional group. The method includes the steps of providing the birefringent lens material; applying the birefringent lens material onto an alignment layer that has been subjected to an alignment treatment in a uniaxial direction, and forming the coating film into a lens shape by conducting curing with ultraviolet light.Type: GrantFiled: October 14, 2014Date of Patent: March 21, 2017Assignee: DIC CORPORATIONInventors: Yasuhiro Kuwana, Hiroshi Hasebe
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Publication number: 20170073581Abstract: The present invention provides a mixture including a compound that has a mesogenic group and satisfying an expression represented by Expression (1): 1.0?YI/?n?50.0??Expression (1) wherein YI represents a yellowness index of the mixture and ?n represents a refractive index anisotropy of the compound having a mesogenic group. In a case of producing an optical anisotropic body constituted by a composition prepared by using the compound, repellence hardly occurs, and the mixture exhibits excellent alignment properties in a case of using the optical anisotropic body. Furthermore, a composition that contains the mixture and an optical anisotropic body that uses the composition are provided.Type: ApplicationFiled: February 24, 2015Publication date: March 16, 2017Inventors: Masahiro Horiguchi, Mika Yamamoto, Yasuhiro Kuwana
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Publication number: 20170066967Abstract: The invention provides a polymerizable composition including a compound that has a mesogenic group and satisfying an expression represented by Expression (1): 1.0?YI/?n?50.0, wherein YI represents a yellowness index of a material including only a compound having a mesogenic group in the polymerizable composition, and ?n represents a refractive index anisotropy of a material including only a compound having a mesogenic group in the polymerizable composition, with the proviso that a chiral compound having a mesogenic group is excluded in the material including only the compound having the mesogenic group. The polymerizable composition has high storage stability and is unlikely to cause an increase of the content of a polymer component when being added to a polymerizable liquid crystal composition, and is excellent in adhesiveness, is not unlikely to cause discoloration, and exhibits good coating properties and good alignment properties in preparing an optical anisotropic body.Type: ApplicationFiled: February 24, 2015Publication date: March 9, 2017Applicant: DIC CorporationInventors: Mika Yamamoto, Masahiro Horiguchi, Yasuhiro Kuwana
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Publication number: 20170003418Abstract: There is provided a compound containing a mesogenic group, which includes a silicon compound at a low concentration, a polymerizable compound containing the mesogenic group, a mixture and a composition using these compounds, a polymerizable mixture having the polymerizable compound, and a polymer, an optically anisotropic body, and a phase difference film using the polymerizable composition. It is possible to obtain the optically anisotropic body and the phase difference film having satisfactory scratch resistance and adhesion, by using the polymerizable composition composed of the compound containing a mesogenic group, which includes a silicon compound at a low concentration.Type: ApplicationFiled: December 18, 2014Publication date: January 5, 2017Applicant: DIC CorporationInventors: Mika Yamamoto, Yasuhiro Kuwana, Hidetoshi Nakata, Koichi Endou, Kunihiko Kotani, Hiroshi Hasebe, Yoshiyuki Ono
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Publication number: 20160370626Abstract: The present invention provides a liquid crystal display device which can prevent a decrease in a voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and solve a problem of a display defect such as white spots, alignment irregularities, burn-in, or the like. The present-invention provides a liquid crystal display device which uses a liquid crystal composition containing a liquid crystal compound having a specific structure as a liquid crystal layer, and an optically anisotropic body obtained by polymerizing a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound having a specific structure at a specific ratio as an in-cell type retardation film.Type: ApplicationFiled: February 24, 2015Publication date: December 22, 2016Applicant: DIC CORPORATIONInventors: Shinji OGAWA, Yoshinori IWASHITA, Mika YAMAMOTO, Yasuhiro KUWANA, Koichi ENDOU, Kazuaki HATSUSAKA
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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: 20160272888Abstract: An object of the present invention is to provide a polymerizable liquid crystal composition with which two characteristics of smoothness of a surface of an anisotropic optical body and orientation properties of liquid crystals can be simultaneously improved, when preparing an anisotropic optical body to be obtained by photopolymerization of the polymerizable liquid crystal composition. Specifically, an object of the present invention is to provide a polymerizable liquid crystal composition containing specific polymerizable compounds and a fluorine-based surfactant. In addition, an anisotropic optical body, a retardation film, an antireflective film, and a liquid crystal display element prepared using the polymerizable liquid crystal composition of the present invention are also provided.Type: ApplicationFiled: October 7, 2014Publication date: September 22, 2016Applicant: DIC CORPORATION (TOKYO)Inventors: Koichi Endou, Yasuhiro Kuwana, Hidetoshi Nakata, Mika Yamamoto, Kazuaki Hatsusaka
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Publication number: 20160237351Abstract: The present invention provides a method for producing a polymerizable liquid crystal composition which produces films being uncolored and having no cissinq and good alignment when applied to a substrate, and also provides a polymerizable liquid crystal composition produced by the method and an optically anisotropic body using the polymerizable liquid crystal composition. Specifically, the present invention provides a method for producing a polymerizable liquid crystal composition, the method comprising a step (I) of preparing a polymerizable solution by mixing at least, one polymerizable compound having at least one polymerizable functional group and one or two or more organic solvents and heating and stirring the resultant mixture; and a step (II) of mixing the polymerizable solution with a polymerization initiator, and also provides a polymerizable liquid crystal composition produced by the method and an optically anisotropic body using the polymerizable liquid crystal composition.Type: ApplicationFiled: October 7, 2014Publication date: August 18, 2016Applicant: DIC CORPORATIONInventors: Koichi Endou, Yasuhiro Kuwana, Hidetoshi Nakata, Mika Yamamoto, Kunihiko Kotani, Hiroshi Hasebe, Yoshiyuki Ono
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Publication number: 20160115338Abstract: The present invention provides a polymerizable composition solution that has good storage stability and allows a polymerizable compound in the polymerizable composition to be aligned well with no defects after application to a base and removal of a solvent by a drying process and also provides an optically anisotropic body that includes the solution and has good alignment without any defects. The present invention provides a solution containing a polymerizable composition and an organic solvent, wherein the polymerizable composition contains 90 mass % or more of a polymerizable compound intramolecularly having a 2-methyl-1,4-phenylene group as represented by general formula (1) and provides an optically anisotropic body including the solution.Type: ApplicationFiled: May 23, 2014Publication date: April 28, 2016Applicant: DIC CorporationInventors: Yasuhiro Kuwana, Hidetoshi Nakata, Koichi Endou, Mika Yamamoto, Kunihiko Kotani, Hiroshi Hasebe, Yoshiyuki Ono