Patents by Inventor Hitoshi Ooishi
Hitoshi Ooishi 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).
-
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
-
Patent number: 10712484Abstract: A multilayer film including: a first long-length substrate; and an optically anisotropic layer containing cured liquid crystal molecules, the optically anisotropic layer being directly disposed on a surface of the first substrate, wherein the surface of the first substrate has a surface tension of 35 to 45 mN/m and an orientation-regulation force generated by stretching, and the optically anisotropic layer has a slow axis along approximately the same direction as an orientation direction of the first substrate by the stretching; and an optical compensation sheet, a ?/4 wave plate, a polarizing plate, a circularly polarizing plate, a liquid crystal display device, and an organic electroluminescent display device having the optically anisotropic layer, as well as production methods thereof.Type: GrantFiled: January 28, 2016Date of Patent: July 14, 2020Assignee: ZEON CORPORATIONInventors: Hitoshi Ooishi, Hiroaki Shu
-
Patent number: 10656308Abstract: An antistatic hard coat film including: a substrate film formed of a thermoplastic resin containing a cycloolefin polymer; and an antistatic hard coat layer provided on the substrate film, the antistatic hard coat layer containing electroconductive metal oxide fine particles, wherein the antistatic hard coat layer has a surface resistance value of 1.0×106 ?/sq. or more and 1.0×1010 ?/sq. or less, and the number of streaks each having a length of 20 cm or longer of the antistatic hard coat layer is 2 or less per area of 1,330 mm×500 mm of the antistatic hard coat layer, and the production method thereof, as well as a polarizing plate, a touch panel, and a liquid crystal display device including the antistatic hard coat film.Type: GrantFiled: September 29, 2016Date of Patent: May 19, 2020Assignee: ZEON CORPORATIONInventors: Mana Shimode, Hitoshi Ooishi, Manabu Tsuburaya
-
Patent number: 10609801Abstract: An antistatic film including: a substrate film made of a thermoplastic resin containing a polymer including an alicyclic structure; and an antistatic layer provided on the substrate film, the layer containing electroconductive metal oxide particles, wherein the antistatic layer has a surface resistance of 1.0×106 ?/sq. or more and 1.0×1010 ?/sq. or less, and the antistatic film has a haze value of 0.3% or less.Type: GrantFiled: October 15, 2015Date of Patent: March 31, 2020Assignee: ZEON CORPORATIONInventor: Hitoshi Ooishi
-
Publication number: 20180275317Abstract: An antistatic hard coat film including: a substrate film formed of a thermoplastic resin containing a cycloolefin polymer; and an antistatic hard coat layer provided on the substrate film, the antistatic hard coat layer containing electroconductive metal oxide fine particles, wherein the antistatic hard coat layer has a surface resistance value of 1.0×106 ?/sq. or more and 1.0×1010 ?/sq. or less, and the number of streaks each having a length of 20 cm or longer of the antistatic hard coat layer is 2 or less per area of 1,330 mm×500 mm of the antistatic hard coat layer, and the production method thereof, as well as a polarizing plate, a touch panel, and a liquid crystal display device including the antistatic hard coat film.Type: ApplicationFiled: September 29, 2016Publication date: September 27, 2018Applicant: ZEON CORPORATIONInventors: Mana SHIMODE, Hitoshi OOISHI, Manabu TSUBURAYA
-
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
-
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
-
Publication number: 20170363790Abstract: A multilayer film including: a first long-length substrate; and an optically anisotropic layer containing cured liquid crystal molecules, the optically anisotropic layer being directly disposed on a surface of the first substrate, wherein the surface of the first substrate has a surface tension of 35 to 45 mN/m and an orientation-regulation force generated by stretching, and the optically anisotropic layer has a slow axis along approximately the same direction as an orientation direction of the first substrate by the stretching; and an optical compensation sheet, a ?/4 wave plate, a polarizing plate, a circularly polarizing plate, a liquid crystal display device, and an organic electroluminescent display device having the optically anisotropic layer, as well as production methods thereof.Type: ApplicationFiled: January 28, 2016Publication date: December 21, 2017Applicant: ZEON CORPORATIONInventors: Hitoshi OOISHI, Hiroaki SHU
-
Publication number: 20170238403Abstract: An antistatic film including: a substrate film made of a thermoplastic resin containing a polymer including an alicyclic structure; and an antistatic layer provided on the substrate film, the layer containing electroconductive metal oxide particles, wherein the antistatic layer has a surface resistance of 1.0×106 ?/sq. or more and 1.0×1010 ?/sq. or less, and the antistatic film has a haze value of 0.3% or less.Type: ApplicationFiled: October 15, 2015Publication date: August 17, 2017Applicant: ZEON CORPORATIONInventor: Hitoshi OOISHI
-
Publication number: 20170157972Abstract: An identification medium including a metal foil and a cholesteric resin layer fragmentally disposed on the metal foil. In the identification medium, chromaticity coordinates (x1, y1) in an xy chromaticity diagram of the metal foil and chromaticity coordinates (x2, y2) in an xy chromaticity diagram of the cholesteric resin layer satisfy: 0?|x1?x2|?0.02 and 0?|y1?y2|?0.02.Type: ApplicationFiled: June 30, 2015Publication date: June 8, 2017Applicant: ZEON CORPORATIONInventor: Hitoshi OOISHI
-
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
-
Publication number: 20130169912Abstract: A multilayer film including: a substrate consisting of a resin that contains a polymer having an alicyclic structure, the substrate having a thickness of not more than 45 ?m; and a resin layer provided on at least one surface of the substrate, the resin layer being formed by curing by irradiation of an active energy ray, wherein: a ratio of the substrate thickness relative to the total of the substrate thickness and the resin thickness is not less than 0.6 and not more than 0.95, and in a temperature range of not less than 30° C. and not more than 90° C., a linear expansion coefficient of the multilayer film is smaller than a linear expansion coefficient of the substrate by 5 ppm/° C. or more.Type: ApplicationFiled: August 19, 2011Publication date: July 4, 2013Applicant: ZEON CORPORATIONInventors: Hitoshi Ooishi, Hiroshi Yakabe
-
Publication number: 20080117509Abstract: An electromagnetic wave shielding grid polarizer wherein a fine grating shape (1) consisting of linear, parallel projecting gratings and a grating shape (2) consisting of parallel gratings crossing fine grating shape (1) and having 0.1-500 ?m width and 1 ?m-100 nm pitch are formed; the total length of portions having lengths 10?5 to l0?1 times the wavelength of electromagnetic wave is at least 80% out of the projecting gratings of fine grating shape (1) segmented by the gratings of grating shape (2); and fine grating shape (1) is electrically interconnected with grating shape (2) by a conductive reflective material. The grid polarizer is made by a method of transferring linear, parallel grooves of a metal mold or a metal film to a transparent resin shaped article, and vapor-depositing a conductive reflective material on the shaped article, or by a method of formation of a conductive reflective material layer on a transparent base, coating with a resist, exposure to active radiation, development and etching.Type: ApplicationFiled: June 30, 2005Publication date: May 22, 2008Applicant: Zeon CorporationInventors: Masahiko Hayashi, Hitoshi Ooishi
-
Publication number: 20060172119Abstract: An antireflection molded article of a thermoplastic resin has an antireflection face having fine protrusions or depressions of pyramids, cones or prisms and entirely or partially formed with inclined faces of the protrusions and the depressions. The average of heights of the protrusions or depths of the depressions is 50 to 600 nm. The average distance between adjacent protrusions or depressions is 50 to 400 nm. The inclined faces of protrusions or depressions has an arithmetic average roughness (Ra) of 100 nm or smaller. The article has a very small reflectance. The process for producing the article comprises forming a shape having protrusions and/or depressions on the surface of a mold core or a stamper using a fine cutting machine and a diamond cutting tool in a room controlled at a prescribed temperature±0.1° C. and injection molding the thermoplastic resin using a mold having the mold core or the stamper having the above shape.Type: ApplicationFiled: July 23, 2004Publication date: August 3, 2006Inventors: Masahiko Hayashi, Hitoshi Ooishi