Patents by Inventor Kazuhiko Saigusa
Kazuhiko Saigusa 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: 9469809Abstract: To provide a liquid crystal composition satisfying at least one characteristic such as a high maximum temperature of a nematic phase, a low minimum temperature thereof, a small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy and specific resistance, a high stability to ultraviolet light and heat; a liquid crystal composition having a suitable balance regarding at least two of the characteristics; and an AM device having a short response time, a large voltage holding ratio and contrast ratio, a long service life; a solution is a liquid crystal composition that has a negative dielectric anisotropy, and contains a specific compound having a large negative dielectric anisotropy as a first component and a specific compound having a small viscosity as a second component, and may contain a specific compound having a large negative dielectric anisotropy as a third component, and a liquid crystal display device including the composition.Type: GrantFiled: January 25, 2013Date of Patent: October 18, 2016Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Kazuhiko Saigusa, Yoshimasa Furusato
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Patent number: 9234134Abstract: To provide a liquid crystal composition satisfying at least one of characteristics or having a suitable balance regarding at least two of the characteristics such as high maximum temperature of a nematic phase, low minimum temperature thereof, small viscosity, suitable optical anisotropy, large negative dielectric anisotropy, large specific resistance, high stability to ultraviolet light and heat; an AM device having short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The liquid crystal composition has negative dielectric anisotropy and contains a compound having high maximum temperature as a first component and a specific compound having large negative dielectric anisotropy as a second component, and may contain a specific compound having small viscosity as a third component, and a specific compound having large negative dielectric anisotropy as a fourth component. A liquid crystal display device includes the composition.Type: GrantFiled: November 28, 2012Date of Patent: January 12, 2016Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Kazuhiko Saigusa, Subaru Kawasaki, Takayoshi Yanai, Norikatsu Hattori
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Publication number: 20150225647Abstract: A liquid crystal composition and an AM liquid crystal display device are described. The liquid crystal composition contains a specific compound having a high maximum temperature or a large positive dielectric anisotropy as a first component and a specific compound having a large negative dielectric anisotropy and a low minimum temperature as a second component, may also contain a specific compound having a small viscosity or a large maximum temperature as a third component, and has a positive dielectric anisotropy. The AM liquid crystal display device includes the composition.Type: ApplicationFiled: September 6, 2013Publication date: August 13, 2015Inventors: Yoshimasa Furusato, Yoshinari Matsumura, Takashi Hiraoka, Toshiki Asakura, Kazuhiko Saigusa
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Patent number: 8932484Abstract: The liquid crystal composition has a negative dielectric anisotropy, and contains a specific bicyclic compound having a large optical anisotropy and negative dielectric anisotropy as a first component and a specific tricyclic compound having a large dielectric anisotropy as a second component, and may contain a specific compound having a small viscosity as a third component, a specific compound having a large dielectric anisotropy and a small viscosity as a fourth component and a specific compound having a large dielectric anisotropy as a fifth component, and the liquid crystal display device includes the composition.Type: GrantFiled: June 2, 2011Date of Patent: January 13, 2015Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Norikatsu Hattori, Kazuhiko Saigusa
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Patent number: 8916063Abstract: A liquid crystal composition and an AM liquid crystal display device are described. The liquid crystal composition has a negative dielectric anisotropy, contains a specific compound having a large negative dielectric anisotropy as a first component and a two-ring compound having a small viscosity as a second component, and may further contain a specific compound having a large negative dielectric anisotropy as a third component, a specific compound having a small viscosity as a fourth component and a specific compound having a large negative dielectric anisotropy as a fifth component. The AM liquid crystal display device includes the liquid crystal composition.Type: GrantFiled: February 8, 2013Date of Patent: December 23, 2014Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Yasuyuki Goto, Kazuhiko Saigusa, Norikatsu Hattori
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Publication number: 20140339472Abstract: To provide a liquid crystal composition satisfying at least one of characteristics or having a suitable balance regarding at least two of the characteristics such as high maximum temperature of a nematic phase, low minimum temperature thereof, small viscosity, suitable optical anisotropy, large negative dielectric anisotropy, large specific resistance, high stability to ultraviolet light and heat; an AM device having short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The liquid crystal composition has negative dielectric anisotropy and contains a compound having high maximum temperature as a first component and a specific compound having large negative dielectric anisotropy as a second component, and may contain a specific compound having small viscosity as a third component, and a specific compound having large negative dielectric anisotropy as a fourth component. A liquid crystal display device includes the composition.Type: ApplicationFiled: November 28, 2012Publication date: November 20, 2014Inventors: Kazuhiko Saigusa, Subaru Kawasaki, Takayoshi Yanai, Norikatsu Hattori
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Patent number: 8795553Abstract: A liquid crystal composition is described, which contains a two-ring compound having a large optical anisotropy and a negatively large dielectric anisotropy as a first component, and a two-ring compound having a negatively large dielectric anisotropy and a small viscosity as a second component, and may further contain at least one of a compound having a small viscosity as a third component, a compound having a negatively large dielectric anisotropy as a fourth component, and a compound having an especially negatively large dielectric anisotropy as a fifth component. An AM liquid crystal display device containing the liquid crystal composition is also described.Type: GrantFiled: February 18, 2011Date of Patent: August 5, 2014Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Norikatsu Hattori, Kazuhiko Saigusa
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Publication number: 20140166931Abstract: A liquid crystal composition and an AM liquid crystal display device are described. The liquid crystal composition has a negative dielectric anisotropy, contains a specific compound having a large negative dielectric anisotropy as a first component and a two-ring compound having a small viscosity as a second component, and may further contain a specific compound having a large negative dielectric anisotropy as a third component, a specific compound having a small viscosity as a fourth component and a specific compound having a large negative dielectric anisotropy as a fifth component. The AM liquid crystal display device includes the liquid crystal composition.Type: ApplicationFiled: February 8, 2013Publication date: June 19, 2014Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Yasuyuki Goto, Kazuhiko Saigusa, Norikatsu Hattori
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Patent number: 8728590Abstract: The liquid crystal composition having a negative dielectric anisotropy contains two ring compound having a large optical anisotropy and a negatively large dielectric anisotropy as the first component, three ring compound having a large maximum temperature and a large dielectric anisotropy as the second component, three ring compound having a large optical anisotropy and a large dielectric anisotropy as the third component, and two ring compound having a small viscosity as the fourth component. The liquid crystal display device contains the compositions.Type: GrantFiled: May 24, 2011Date of Patent: May 20, 2014Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Norikatsu Hattori, Kazuhiko Saigusa
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Patent number: 8730435Abstract: In a liquid crystal display device having a plurality of retardation films for alleviating a deterioration in display quality depending on a viewing angle direction, and a driving liquid crystal layer selected from the group consisting of a driving liquid crystal layer typified by a VA mode wherein a liquid crystal molecule in a driving liquid crystal medium is aligned perpendicular to a substrate when no electric field is applied, a driving liquid crystal layer typified by an IPS mode wherein a liquid crystal molecule in a driving liquid crystal medium is aligned parallel to the substrate when no electric field is applied, and a driving liquid crystal layer that shows optical isotropy when no voltage is applied, a retardation film of a positive A-plate formed of a liquid crystalline polyimide having a photoreactive group is used as at least one layer of the plurality of retardation films.Type: GrantFiled: June 30, 2010Date of Patent: May 20, 2014Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Kazuhiko Saigusa, Norio Tamura
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Publication number: 20130193377Abstract: To provide a liquid crystal composition satisfying at least one characteristic such as a high maximum temperature of a nematic phase, a low minimum temperature thereof, a small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy and specific resistance, a high stability to ultraviolet light and heat; a liquid crystal composition having a suitable balance regarding at least two of the characteristics; and an AM device having a short response time, a large voltage holding ratio and contrast ratio, a long service life; a solution is a liquid crystal composition that has a negative dielectric anisotropy, and contains a specific compound having a large negative dielectric anisotropy as a first component and a specific compound having a small viscosity as a second component, and may contain a specific compound having a large negative dielectric anisotropy as a third component, and a liquid crystal display device including the composition.Type: ApplicationFiled: January 25, 2013Publication date: August 1, 2013Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Kazuhiko SAIGUSA, Yoshimasa FURUSATO
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Publication number: 20130062559Abstract: The liquid crystal composition has a negative dielectric anisotropy, and contains a specific bicyclic compound having a large optical anisotropy and negative dielectric anisotropy as a first component and a specific tricyclic compound having a large dielectric anisotropy as a second component, and may contain a specific compound having a small viscosity as a third component, a specific compound having a large dielectric anisotropy and a small viscosity as a fourth component and a specific compound having a large dielectric anisotropy as a fifth component, and the liquid crystal display device includes the composition.Type: ApplicationFiled: June 2, 2011Publication date: March 14, 2013Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Norikatsu Hattori, Kazuhiko Saigusa
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Publication number: 20130062560Abstract: The liquid crystal composition having a negative dielectric anisotropy contains two ring compound having a large optical anisotropy and a negatively large dielectric anisotropy as the first component, three ring compound having a large maximum temperature and a large dielectric anisotropy as the second component, three ring compound having a large optical anisotropy and a large dielectric anisotropy as the third component, and two ring compound having a small viscosity as the fourth component. The liquid crystal display device contains the compositions.Type: ApplicationFiled: May 24, 2011Publication date: March 14, 2013Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Norikatsu Hattori, Kazuhiko Saigusa
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Publication number: 20130001469Abstract: A liquid crystal composition is described, which contains a two-ring compound having a large optical anisotropy and a negatively large dielectric anisotropy as a first component, and a two-ring compound having a negatively large dielectric anisotropy and a small viscosity as a second component, and may further contain at least one of a compound having a small viscosity as a third component, a compound having a negatively large dielectric anisotropy as a fourth component, and a compound having an especially negatively large dielectric anisotropy as a fifth component. An AM liquid crystal display device containing the liquid crystal composition is also described.Type: ApplicationFiled: February 18, 2011Publication date: January 3, 2013Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Norikatsu Hattori, Kazuhiko Saigusa
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Publication number: 20120133871Abstract: Provided is a technology by which a retardation film in which regions different from each other in one or both of optical characteristics, i.e., an optical axis and a retardation are patterned can be produced with an additionally small load. The retardation film is formed of a liquid crystalline polyimide film having a photoreactive group. Further provided is an optical device and a liquid crystal display apparatus each having the retardation film.Type: ApplicationFiled: June 17, 2010Publication date: May 31, 2012Applicants: JNC Petrochemical Corporation, JNC CorporationInventors: Kazuhiko Saigusa, Norio Tamura
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Publication number: 20120113338Abstract: In a liquid crystal display device having a plurality of retardation films for alleviating a deterioration in display quality depending on a viewing angle direction, and a driving liquid crystal layer selected from the group consisting of a driving liquid crystal layer typified by a VA mode wherein a liquid crystal molecule in a driving liquid crystal medium is aligned perpendicular to a substrate when no electric field is applied, a driving liquid crystal layer typified by an IPS mode wherein a liquid crystal molecule in a driving liquid crystal medium is aligned parallel to the substrate when no electric field is applied, and a driving liquid crystal layer that shows optical isotropy when no voltage is applied, a retardation film of a positive A-plate formed of a liquid crystalline polyimide having a photoreactive group is used as at least one layer of the plurality of retardation films.Type: ApplicationFiled: June 30, 2010Publication date: May 10, 2012Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Kazuhiko Saigusa, Norio Tamura
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Patent number: 7527837Abstract: The compound provided by the present invention is a polymerizable optically active compound represented by Formula (1): wherein R1 is hydrogen, chlorine or bromine; R2 is hydrogen, methyl or ethyl; A1 is 1,4-phenylene, biphenyl-4,4?-diyl, naphthalene-2,6-diyl or pyridine-2,5-diyl, provided that in the 1,4-phenylene arbitrary hydrogen may be replaced by chlorine, bromine or fluorine, and in the biphenyl-4,4?-diyl arbitrary hydrogen may be replaced by chlorine, bromine or fluorine; and X1 is a single bond, —CH?CH— or —CH2CH2—.Type: GrantFiled: November 29, 2006Date of Patent: May 5, 2009Assignees: Chisso Corporation, Chisso Petrochemical CorporationInventors: Ryushi Shundo, Kazuhiko Saigusa
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Patent number: 7425354Abstract: The present invention provides a photopolymerizable liquid crystal composition comprising at least a compound having oxiranyl as a first component and at least a compound having oxetanyl as a second component, a polymer or a polymer composition obtained from the liquid crystal composition, a film obtained from the polymer or polymer composition, and an optical compensation element using the film.Type: GrantFiled: November 19, 2004Date of Patent: September 16, 2008Assignees: Chisso Corporation, Chisso Petrochemical CorporationInventors: Motoki Yanai, Kazuhiko Saigusa, Ryushi Shundo, Yoshiharu Hirai
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Patent number: 7413782Abstract: Provided are a polymerizing liquid-crystalline compound of formula (1). In formula (1), Q1 to Q4 each independently represent a formula (2), a hydrogen atom, a halogen atom, an alkyl group or the like; at least two of Q1 to Q4 are a formula (2) and may differ from each other. In formula (2), A independently represent a 1,4-cyclohexylene group, a 1,4-phenylene group or the like; X independently represents a single bond, an alkylene group or the like; Z represents a single bond, —COO—, —OCO— or the like; n indicates an integer of from 0 to 3; p represents any one polymerizing group of formulae (P1) to (P8); W represents a hydrogen atom, a halogen atom, an alkyl group or the like. When Q1 and Q2 are both hydrogen atoms and when Q3 and Q4 are both formula (2), then p must not be (P8).Type: GrantFiled: February 14, 2005Date of Patent: August 19, 2008Assignees: Chisso Corporation, Chisso Petrochemical CorporationInventors: Takashi Kato, Kazuhiko Saigusa, Tomohiro Etou, Kazutoshi Miyazawa
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Patent number: RE48467Abstract: The liquid crystal composition having a negative dielectric anisotropy contains two ring compound having a large optical anisotropy and a negatively large dielectric anisotropy as the first component, three ring compound having a large maximum temperature and a large dielectric anisotropy as the second component, three ring compound having a large optical anisotropy and a large dielectric anisotropy as the third component, and two ring compound having a small viscosity as the fourth component. The liquid crystal display device contains the compositions.Type: GrantFiled: February 8, 2016Date of Patent: March 16, 2021Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Norikatsu Hattori, Kazuhiko Saigusa