Patents by Inventor Masashi Aimatsu
Masashi Aimatsu 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: 20220289988Abstract: A composite pigment includes first and second cholesteric liquid crystal pigments. The first cholesteric liquid crystal pigment has a center wavelength of a selective reflection band within a wavelength range of 400 nm or more and 800 nm or less and a selective reflection bandwidth of 150 nm or less. The second cholesteric liquid crystal pigment has a selective reflection bandwidth of 200 nm or more within a wavelength range of 400 nm or more and 800 nm or less. The selective reflection band of the first cholesteric liquid crystal pigment and a selective reflection band of the second cholesteric liquid crystal pigment at least partially overlap with each other. A containing amount of the first cholesteric liquid crystal pigment relative to a total amount of the first and second cholesteric liquid crystal pigments is more than 30% by weight and 80% by weight or less.Type: ApplicationFiled: July 21, 2020Publication date: September 15, 2022Applicant: ZEON CORPORATIONInventor: Masashi AIMATSU
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Publication number: 20220275213Abstract: A composite pigment includes first and second cholesteric liquid crystal pigments. The first cholesteric liquid crystal pigment has a center wavelength of a selective reflection band within a wavelength range of 400 nm or more and 800 nm or less and a selective reflection bandwidth of 150 nm or less. The second cholesteric liquid crystal pigment has a selective reflection bandwidth of 200 nm or more within a wavelength range of 400 nm or more and 800 nm or less. The selective reflection band of the first cholesteric liquid crystal pigment and a selective reflection band of the second cholesteric liquid crystal pigment at least partially overlap with each other. A containing amount of the first cholesteric liquid crystal pigment relative to a total amount of the first and second cholesteric liquid crystal pigments is more than 0% by weight and 30% by weight or less.Type: ApplicationFiled: July 21, 2020Publication date: September 1, 2022Applicant: ZEON CORPORATIONInventor: Masashi AIMATSU
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Patent number: 11391876Abstract: An optically anisotropic layered body including a first optically anisotropic layer and a second optically anisotropic layer, wherein the first optically anisotropic layer satisfies 220 nm<Re1(590)<330 nm, Re1(450)/Re1(550)?1.0, Re1(650)/Re1(550)?1.0, and 0.95<NZ1<2.00, and the second optically anisotropic layer satisfies 110 nm<Re2(590)<165 nm, Re2(450)/Re2(550)?1.0, Re2(650)/Re2(550)?1.0, and ?1.5?NZ2?0.00.Type: GrantFiled: February 14, 2018Date of Patent: July 19, 2022Assignee: ZEON CORPORATIONInventors: Kazuhiro Osato, Masashi Aimatsu
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Publication number: 20220177419Abstract: A phase difference plate includes a phase difference plate P1 and a phase difference plate P2. An in-plane slow axis of the phase difference plate P1 is orthogonal to an in-plane slow axis of the phase difference plate P2. The phase difference plate P2 includes a layer of a liquid crystal material oriented in an in-plane direction. An in-plane retardation ReP2(?) at a wavelength ? nm of the phase difference plate P2 satisfies the following formulae (e1) and (e2): {Re2(400)?Re2(550)}/{Re2(550)?Re2(700)}<2.90 (e1), and Re2(400)/Re2(700)>1.13 (e2). An in-plane retardation ReP1(?) of the phase difference plate P1 at a wavelength ? nm and the in-plane retardation ReP2(?) of the phase difference plate P2 at the wavelength ? nm satisfy the following formulae (e4) and (e5): ReP1(550)>ReP2(550) (e4), and ReP1(400)/ReP1(700)<ReP2(400)/ReP2(700) (e5).Type: ApplicationFiled: February 21, 2022Publication date: June 9, 2022Applicant: ZEON CORPORATIONInventors: Masakazu SAITO, Kazuhiro OSATO, Masashi AIMATSU, Kei SAKAMOTO
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Publication number: 20210198576Abstract: An identification medium comprising a first resin layer and a second resin layer in this order from a viewing side, wherein the first resin layer contains a first cholesteric liquid crystal resin that is a cured product of a first liquid crystal composition, and the first cholesteric liquid crystal resin selectively reflects light at a wavelength of 700 nm or longer and 900 nm or shorter, the second resin layer contains a second cholesteric liquid crystal resin that is a cured product of a second liquid crystal composition, and the second cholesteric liquid crystal resin selectively reflects light at a wavelength of 400 nm or longer and 500 nm or shorter, and the first resin layer has an average value of light transmittance at a wavelength of 400 nm or longer and 425 nm or shorter of 50% or more and 90% or less.Type: ApplicationFiled: May 29, 2019Publication date: July 1, 2021Applicant: ZEON CORPORATIONInventor: Masashi AIMATSU
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Patent number: 10935835Abstract: An optically anisotropic layered body including a first optically anisotropic layer and a second optically anisotropic layer, wherein each of refractive indices of the second optically anisotropic layer, in-plane retardations of the first optically anisotropic layer, thickness direction retardations of the second optically anisotropic layer, in-plane retardations of the optically anisotropic layered body, NZ factors of the optically anisotropic layered body, and thickness direction retardations Rth of the optically anisotropic layered body satisfies specific relationships.Type: GrantFiled: August 2, 2017Date of Patent: March 2, 2021Assignee: ZEON CORPORATIONInventors: Kazuhiro Osato, Masashi Aimatsu
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Patent number: 10830935Abstract: A phase difference plate including an optically anisotropic layer obtained by curing a composition (A) containing a polymerizable liquid crystal compound with reverse wavelength dispersion and a polymerizable monomer, wherein the polymerizable liquid crystal compound with reverse wavelength dispersion has a main chain mesogen and a side chain mesogen bonded to the main chain mesogen in the molecule thereof; the main chain mesogen and the side chain mesogen are oriented in different directions, whereby a birefringence ?n of the optically anisotropic layer has reverse wavelength dispersion property; and retardations of a layer obtained by curing a composition (A0) in which the polymerizable monomer in the composition (A) is replaced by the polymerizable liquid crystal compound with reverse wavelength dispersion and retardations of the optically anisotropic layer satisfy specific relationship; and a circularly polarizing plate and a display device including the same.Type: GrantFiled: May 11, 2018Date of Patent: November 10, 2020Assignee: ZEON CORPORATIONInventors: Masashi Aimatsu, Hitoshi Ooishi
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Patent number: 10824016Abstract: An optically anisotropic layered body including a first optically anisotropic layer and a second optically anisotropic layer, wherein in-plane retardations Re(H450), Re(H550), Re(H590), and Re(H650) of the first optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, and in-plane retardations Re(Q450), Re(Q550), Re(Q590), and Re(Q650) of the second optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, satisfy specific requirements.Type: GrantFiled: March 27, 2017Date of Patent: November 3, 2020Assignee: ZEON CORPORATIONInventors: Kazuhiro Oosato, Masashi Aimatsu, Masakazu Saito
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Publication number: 20200233133Abstract: An optically anisotropic layered body including a first optically anisotropic layer and a second optically anisotropic layer, wherein the first optically anisotropic layer satisfies 220 nm<Re1(590)<330 nm, Re1(450)/Re1(550)?1.0, Re1(650)/Re1(550)?1.0, and 0.95<NZ1<2.00, and the second optically anisotropic layer satisfies 110 nm<Re2(590)<165 nm, Re2(450)/Re2(550)?1.0, Re2(650)/Re2(550)?1.0, and ?1.5?NZ2?0.00.Type: ApplicationFiled: February 14, 2018Publication date: July 23, 2020Applicant: ZEON CORPORATIONInventors: Kazuhiro OSATO, Masashi AIMATSU
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Publication number: 20200012147Abstract: An optically anisotropic layered body including a first optically anisotropic layer and a second optically anisotropic layer, wherein each of refractive indices of the second optically anisotropic layer, in-plane retardations of the first optically anisotropic layer, thickness direction retardations of the second optically anisotropic layer, in-plane retardations of the optically anisotropic layered body, NZ factors of the optically anisotropic layered body, and thickness direction retardations Rth of the optically anisotropic layered body satisfies specific relationships.Type: ApplicationFiled: August 2, 2017Publication date: January 9, 2020Applicant: ZEON CORPORATIONInventors: Kazuhiro OSATO, Masashi AIMATSU
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Publication number: 20200012026Abstract: A phase difference plate including a layer of a liquid crystal material oriented in an in-plane direction, wherein an in-plane retardation Re(?) at a wavelength ? nm of the phase difference plate satisfes the following formulae (e1) and (e2): {Re(400)-Re(550)}/{Re(550)-Re(700)}<2.90 (e1), and Re(400)/Re(700) >1.13 (e2); as well as a multilayer phase difference plate including the same, a polarizing plate including the same, and an image display device including the same.Type: ApplicationFiled: March 16, 2018Publication date: January 9, 2020Applicant: ZEON CORPORATIONInventors: Masakazu SAITO, Kazuhiro OSATO, Masashi AIMATSU, Kei SAKAMOTO
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Publication number: 20190079355Abstract: An optically anisotropic layered body including a first optically anisotropic layer and a second optically anisotropic layer, wherein in-plane retardations Re(H450), Re(H550), Re(H590), and Re(H650) of the first optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, and in-plane retardations Re(Q450), Re(Q550), Re(Q590), and Re(Q650) of the second optically anisotropic layer at wavelengths of 450 nm, 550 nm, 590 nm, and 650 nm, respectively, satisfy specific requirements.Type: ApplicationFiled: March 27, 2017Publication date: March 14, 2019Applicant: ZEON CORPORATIONInventors: Kazuhiro OOSATO, Masashi AIMATSU, Masakazu SAITO
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Publication number: 20180259699Abstract: A phase difference plate including an optically anisotropic layer obtained by curing a composition (A) containing a polymerizable liquid crystal compound with reverse wavelength dispersion and a polymerizable monomer, wherein the polymerizable liquid crystal compound with reverse wavelength dispersion has a main chain mesogen and a side chain mesogen bonded to the main chain mesogen in the molecule thereof; the main chain mesogen and the side chain mesogen are oriented in different directions, whereby a birefringence ?n of the optically anisotropic layer has reverse wavelength dispersion property; and retardations of a layer obtained by curing a composition (A0) in which the polymerizable monomer in the composition (A) is replaced by the polymerizable liquid crystal compound with reverse wavelength dispersion and retardations of the optically anisotropic layer satisfy specific relationship; and a circularly polarizing plate and a display device including the same.Type: ApplicationFiled: May 11, 2018Publication date: September 13, 2018Inventors: Masashi AIMATSU, Hitoshi OOISHI
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Patent number: 9995865Abstract: A phase difference plate including an optically anisotropic layer obtained by curing a composition (A) containing a polymerizable liquid crystal compound with reverse wavelength dispersion and a polymerizable monomer, wherein the polymerizable liquid crystal compound with reverse wavelength dispersion has a main chain mesogen and a side chain mesogen bonded to the main chain mesogen in the molecule thereof; the main chain mesogen and the side chain mesogen are oriented in different directions, whereby a birefringence ?n of the optically anisotropic layer has reverse wavelength dispersion property; and retardations of a layer obtained by curing a composition (A0) in which the polymerizable monomer in the composition (A) is replaced by the polymerizable liquid crystal compound with reverse wavelength dispersion and retardations of the optically anisotropic layer satisfy specific relationship; and a circularly polarizing plate and a display device including the same.Type: GrantFiled: October 21, 2013Date of Patent: June 12, 2018Assignee: ZEON CORPORATIONInventors: Masashi Aimatsu, Hitoshi Ooishi
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Patent number: 9690022Abstract: Liquid crystal composition containing polymerizable liquid crystal compound with reverse wavelength dispersion and one additive-monomer-A and additive-monomer-B, wherein: liquid crystal compound includes (in molecule), a main chain mesogen and side chain mesogen, optical axis of the main chain mesogen and optical axis of the side chain mesogen in different directions when compound is uniformly oriented, reversing wavelength dispersion property of birefringence; when the additive-monomer is in liquid crystal compound, the additive-monomer-A satisfies Expression(i); the additive-monomer-B satisfies Expression(ii) within wavelength range ?=380 nm-780 nm: ne>nea and no<noa Expression(i), ne<neb and no>nob Expression(ii) (ne is a refractive index of liquid crystal compound in slow-axis-direction, no is a refractive index of liquid crystal compound in fast-axis-direction, nea and noa are refractive indices of the additive-monomer-A in ne and no direction when dispersed in liquid crystal compound, neb anType: GrantFiled: October 30, 2013Date of Patent: June 27, 2017Assignee: ZEON CORPORATIONInventor: Masashi Aimatsu
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Publication number: 20150285979Abstract: A liquid crystal composition containing a polymerizable liquid crystal compound with reverse wavelength dispersion and one of an additive monomer A and an additive monomer B, wherein: the liquid crystal compound includes, in a molecule thereof, a main chain mesogen and a side chain mesogen, an optical axis of the main chain mesogen and an optical axis of the side chain mesogen being oriented in different directions when the compound is uniformly oriented, to have reverse wavelength dispersion property of birefringence ?n, and when the additive monomer is dispersed in the liquid crystal compound, the additive monomer A satisfies the following Expression (i), and the additive monomer B satisfies the following Expression (ii) within the wavelength range of ?=380 nm to 780 nm: ne>nea and no<noa Expression (i), ne<neb and no>nob Expression (ii) (ne is a refractive index of the liquid crystal compound in a slow axis direction, no is a refractive index of the liquid crystal compound in a fast axis directType: ApplicationFiled: October 30, 2013Publication date: October 8, 2015Inventor: Masashi Aimatsu
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Publication number: 20150277010Abstract: A phase difference plate including an optically anisotropic layer obtained by curing a composition (A) containing a polymerizable liquid crystal compound with reverse wavelength dispersion and a polymerizable monomer, wherein the polymerizable liquid crystal compound with reverse wavelength dispersion has a main chain mesogen and a side chain mesogen bonded to the main chain mesogen in the molecule thereof; the main chain mesogen and the side chain mesogen are oriented in different directions, whereby a birefringence ?n of the optically anisotropic layer has reverse wavelength dispersion property; and retardations of a layer obtained by curing a composition (A0) in which the polymerizable monomer in the composition (A) is replaced by the polymerizable liquid crystal compound with reverse wavelength dispersion and retardations of the optically anisotropic layer satisfy specific relationship; and a circularly polarizing plate and a display device including the same.Type: ApplicationFiled: October 21, 2013Publication date: October 1, 2015Inventors: Masashi Aimatsu, Hitoshi Ooishi
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Patent number: 8350998Abstract: A retardation layer that includes regions causing different retardations can be manufactured easily. A retardation substrate includes a substrate and a solidified liquid crystal layer facing its main surface. The solidified liquid crystal layer includes first to third regions, and a degree of depolarization for each of the regions is less than 5.0×10?4. A difference between the maximum and minimum values of the degrees of depolarization obtained for the regions is less than 2.0×10?4.Type: GrantFiled: February 14, 2011Date of Patent: January 8, 2013Assignee: Toppan Printing Co., Ltd.Inventors: Sosuke Akao, Yuji Kubo, Noritaka Mihashi, Godai Fukunaga, Masashi Aimatsu, Takeshi Itoi
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Patent number: 8101249Abstract: A retardation layer that includes regions causing different retardations can be manufactured easily. A retardation substrate includes a substrate and a solidified liquid crystal layer supported by the substrate. The solidified liquid crystal layer includes first to third regions. The first to third regions re arranged on the substrate and different in degree of orientation of mesogens.Type: GrantFiled: November 12, 2010Date of Patent: January 24, 2012Assignee: Toppan Printing Co., Ltd.Inventors: Sosuke Akao, Yuji Kubo, Masashi Aimatsu, Takao Taguchi
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Publication number: 20110141407Abstract: A retardation layer that includes regions causing different retardations can be manufactured easily. A retardation substrate includes a substrate and a solidified liquid crystal layer facing its main surface. The solidified liquid crystal layer includes first to third regions, and a degree of depolarization for each of the regions is less than 5.0×10?4. A difference between the maximum and minimum values of the degrees of depolarization obtained for the regions is less than 2.0×10?4.Type: ApplicationFiled: February 14, 2011Publication date: June 16, 2011Applicant: TOPPAN PRINTING CO., LTD.Inventors: Sosuke Akao, Yuji Kubo, Noritaka Mihashi, Godai Fukunaga, Masashi Aimatsu, Takeshi Itoi