Patents by Inventor Shinsuke Toyomasu
Shinsuke Toyomasu 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: 9932488Abstract: A resin composition including from 30 to 99 wt % of a cellulose-based resin represented by the following formula (1) and from 70 to 1 wt % of a fumaric acid ester polymer containing 30 mol % or more of a fumaric acid diester residue unit represented by the following formula (2); an optical compensation film using the same; and a production method of the optical compensation film. (wherein R1 to R3 represent a substituent having a carbon number of 1 to 12, and R4 and R5 represent an alkyl group having a carbon number of 1 to 12).Type: GrantFiled: June 4, 2014Date of Patent: April 3, 2018Assignee: TOSOH CORPORATIONInventors: Masayasu Ito, Shinsuke Toyomasu, Takahiro Kitagawa
-
Patent number: 9370901Abstract: A resin composition containing a specific cellulose-based resin and a specific fumaric acid diester polymer in a specific blending ratio or containing, as the resin component, a specific cellulose-based resin and a specific fumaric acid diester polymer in a specific blending ratio and containing the resin component and an additive having an aromatic hydrocarbon ring or the like in a specific blending ratio. An optical compensation film can be produced using the resin composition.Type: GrantFiled: July 26, 2012Date of Patent: June 21, 2016Assignee: TOSOH CORPORATIONInventors: Tohru Doi, Takahiro Kitagawa, Takashi Fukuda, Shinsuke Toyomasu
-
Publication number: 20160115333Abstract: A resin composition including from 30 to 99 wt % of a cellulose-based resin represented by the following formula (1) and from 70 to 1 wt % of a fumaric acid ester polymer containing 30 mol % or more of a fumaric acid diester residue unit represented by the following formula (2); an optical compensation film using the same; and a production method of the optical compensation film. (wherein R1 to R3 represent a substituent having a carbon number of 1 to 12, and R4 and R5 represent an alkyl group having a carbon number of 1 to 12).Type: ApplicationFiled: June 4, 2014Publication date: April 28, 2016Applicant: TOSOH CORPORATIONInventors: Masayasu ITO, Shinsuke TOYOMASU, Takahiro KITAGAWA
-
Patent number: 9321870Abstract: To provide a novel diisopropyl fumarate-cinnamic acid derivative-based copolymer expected to be formed into a retardation film having excellent optical properties ensuring that, for example, the refractive index in the film thickness direction and the out-of-plane retardation are large and even in the form of a thin film, the film has a high out-of-plane retardation, and a retardation film using the same. The diisopropyl fumarate-cinnamic acid derivative-based copolymer contains: a diisopropyl fumarate residue unit; and a cinnamic acid residue unit or a cinnamic acid ester residue unit having an alkyl group with a carbon number of 1 to 6.Type: GrantFiled: July 16, 2013Date of Patent: April 26, 2016Assignee: TOSOH CORPORATIONInventors: Takahiro Kitagawa, Shinsuke Toyomasu, Yasuyoshi Fujii
-
Patent number: 9266988Abstract: A fumaric acid diester based resin containing a dipropyl fumarate residue unit and a fumaric acid diester residue unit having a C1 or C2 alkyl group, wherein in a retardation film composed of the resin, when a refractive index in the fast axis direction within the film plane is designated as nx, a refractive index in the film in-plane direction orthogonal thereto is designated as ny, and a refractive index in the thickness direction of the film is designated as nz, the respective refractive indices are satisfied with a relationship of (nx?ny<nz) and a relationship between a film thickness and an out-of-plane retardation measured at a wavelength of 550 nm and expressed by the specific equation is 4.5 nm/film thickness (?m) or more in terms of an absolute value.Type: GrantFiled: June 24, 2011Date of Patent: February 23, 2016Assignee: TOSOH CORPORATIONInventors: Kenichi Makita, Shinji Shimosato, Shinsuke Toyomasu, Tohru Doi
-
Patent number: 9268076Abstract: Optical compensation layers are provided which have an optically compensating function imparted thereto upon coating fluid application or upon coating fluid application and subsequent uniaxial stretching and which have a small wavelength dependence of retardation.Type: GrantFiled: April 17, 2008Date of Patent: February 23, 2016Assignee: TOSOH CORPORATIONInventors: Toru Doi, Shinsuke Toyomasu, Sou Ozaki, Shinji Shimosato
-
Publication number: 20150232599Abstract: To provide a novel diisopropyl fumarate-cinnamic acid derivative-based copolymer expected to be formed into a retardation film having excellent optical properties ensuring that, for example, the refractive index in the film thickness direction and the out-of-plane retardation are large and even in the form of a thin film, the film has a high out-of-plane retardation, and a retardation film using the same. The diisopropyl fumarate-cinnamic acid derivative-based copolymer contains: a diisopropyl fumarate residue unit; and a cinnamic acid residue unit or a cinnamic acid ester residue unit having an alkyl group with a carbon number of 1 to 6.Type: ApplicationFiled: July 16, 2013Publication date: August 20, 2015Applicant: TOSOH CORPORATIONInventors: Takahiro Kitagawa, Shinsuke Toyomasu, Yasuyoshi Fujii
-
Publication number: 20140153096Abstract: A resin composition containing a specific cellulose-based resin and a specific fumaric acid diester polymer in a specific blending ratio or containing, as the resin component, a specific cellulose-based resin and a specific fumaric acid diester polymer in a specific blending ratio and containing the resin component and an additive having an aromatic hydrocarbon ring or the like in a specific blending ratio. An optical compensation film can be produced using the resin composition.Type: ApplicationFiled: July 26, 2012Publication date: June 5, 2014Applicant: TOSOH CORPORATIONInventors: Tohru Doi, Takahiro Kitagawa, Takashi Fukuda, Shinsuke Toyomasu
-
Publication number: 20130102751Abstract: A fumaric acid diester based resin containing a dipropyl fumarate residue unit and a fumaric acid diester residue unit having a C1 or C2 alkyl group, wherein in a retardation film composed of the resin, when a refractive index in the fast axis direction within the film plane is designated as nx, a refractive index in the film in-plane direction orthogonal thereto is designated as ny, and a refractive index in the thickness direction of the film is designated as nz, the respective refractive indices are satisfied with a relationship of (nx?ny<nz) and a relationship between a film thickness and an out-of-plane retardation measured at a wavelength of 550 nm and expressed by the specific equation is 4.5 nm/film thickness (?m) or more in terms of an absolute value.Type: ApplicationFiled: June 24, 2011Publication date: April 25, 2013Applicant: Tosoh CorporationInventors: Kenichi Makita, Shinji Shimosato, Shinsuke Toyomasu, Tohru Doi
-
Publication number: 20100110353Abstract: Optical compensation layers are provided which have an optically compensating function imparted thereto upon coating fluid application or upon coating fluid application and subsequent uniaxial stretching and which have a small wavelength dependence of retardation.Type: ApplicationFiled: April 17, 2008Publication date: May 6, 2010Applicant: TOSOH CORPORATIONInventors: Toru Doi, Shinsuke Toyomasu, Sou Ozaki, Shinji Shimosato
-
Wide-viewing angle compensation film and transmission type liquid-crystal display employing the same
Patent number: 7476425Abstract: A wide-viewing angle compensation film contains a polarizing plate and an optical compensation film which exhibits negative birefringence and has an in-plane retardation (Re1) of 60-220 nm and an orientation parameter (Nz) in the range of 0±0.05, the optical compensation film exhibiting negative birefringence and the polarizing plate being stacked so that the slow axis of the compensation film is perpendicular or parallel to the absorption axis of the polarizing plate; and a transmission type liquid-crystal display contains a liquid-crystal cell and the wide-viewing angle compensation film disposed on at least one side of the cell.Type: GrantFiled: March 21, 2006Date of Patent: January 13, 2009Assignee: Tosoh CorporationInventors: Naoto Obara, Shinsuke Toyomasu -
WIDE-VIEWING ANGLE COMPENSATION FILM AND TRANSMISSION TYPE LIQUID-CRYSTAL DISPLAY EMPLOYING THE SAME
Publication number: 20060216436Abstract: A wide-viewing angle compensation film contains a polarizing plate and an optical compensation film which exhibits negative birefringence and has an in-plane retardation (Re1) of 60-220 nm and an orientation parameter (Nz) in the range of 0±0.05, the optical compensation film exhibiting negative birefringence and the polarizing plate being stacked so that the slow axis of the compensation film is perpendicular or parallel to the absorption axis of the polarizing plate; and a transmission type liquid-crystal display contains a liquid-crystal cell and the wide-viewing angle compensation film disposed on at least one side of the cell.Type: ApplicationFiled: March 21, 2006Publication date: September 28, 2006Applicant: TOSOH CORPORATIONInventors: Naoto OBARA, Shinsuke Toyomasu -
Patent number: 7001967Abstract: A transparent heat-resistant resin optical materials having excellent heat resistance and dynamic characteristics, having negative birefringence and exhibiting a high refractive index and a high Abbe number, especially optical compensating members such as films, sheets and retardation films for LCD display element. The transparent heat-resistant resin optical material is made of a copolymer containing a specific olefin residue unit and a specific N-phenyl-substituted maleimide residue unit and having a weight average molecular weight, as reduced into standard polystyrene, of from 5×103 to 5×106, the transparent heat-resistant resin optical material exhibiting negative birefringence; and a retardation film having a relationship of three-dimensional refractive indexes of nz?ny>nx, nz>ny?nx, or nz>nx?ny.Type: GrantFiled: September 17, 2003Date of Patent: February 21, 2006Assignee: Tosoh CorporationInventors: Shinsuke Toyomasu, Yojiro Ikai
-
Publication number: 20040190138Abstract: A resin composition having excellent heat resistance and dynamic characteristic and having excellent characteristics as a composition for optical films exhibiting negative birefringence, an optical film exhibiting negative birefringence comprising the resin composition, and a process of producing the optical film are provided. The resin composition comprises (a) 30-95% by weight of a copolymer containing an &agr;-olefin residual group unit and an N-phenyl-substituted maleimide residual group unit and having a weight average molecular weight, as reduced into standard polystyrene, of 5×103 to 5×106; and (b) 70-5% by weight of an acrylonitrile-styrene based copolymer, a weight ratio of an acrylonitrile residual group unit to a styrene residual group unit being 20/80 to 35/65, and having a weight average molecular weight, as reduced into standard polystyrene, of 5×103 to 5×106.Type: ApplicationFiled: March 18, 2004Publication date: September 30, 2004Applicant: TOSOH CORPORATIONInventors: Shinsuke Toyomasu, Yojiro Ikai
-
Publication number: 20040063887Abstract: A transparent heat-resistant resin optical materials having excellent heat resistance and dynamic characteristics, having negative birefringence and exhibiting a high refractive index and a high Abbe number, especially optical compensating members such as films, sheets and retardation films for LCD display element. The transparent heat-resistant resin optical material is made of a copolymer containing a specific olefin residue unit and a specific N-phenyl-substituted maleimide residue unit and having a weight average molecular weight, as reduced into standard polystyrene, of from 5×103 to 5×106, the transparent heat-resistant resin optical material exhibiting negative birefringence; and a retardation film having a relationship of three-dimensional refractive indexes of nz≧ny>nx, nz>ny≧nx, or nz>nx≧ny.Type: ApplicationFiled: September 17, 2003Publication date: April 1, 2004Applicant: TOSOH CORPORATIONInventors: Shinsuke Toyomasu, Yojiro Ikai
-
Patent number: 5264473Abstract: Polyvinyl chloride based resin compositions improved in the vibrational energy absorbing ability are disclosed. The compositions comprises a specific class of phthalic acid esters and a specific class of phosphori acid esters. Articles formed of the compositions are also disclosed.Type: GrantFiled: May 9, 1991Date of Patent: November 23, 1993Assignee: Tosoh CorporationInventors: Hiroaki Furukawa, Kazuyasu Higashiyama, Kentaro Iwanaga, Yasumi Tanaka, Tadashi Usuki, Koji Tanaka, Shinsuke Toyomasu