Patents by Inventor Yoshinari Matsumura
Yoshinari Matsumura 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: 20200183203Abstract: Provided is a reverse mode light scattering type liquid crystal device that is capable of withstanding practical use, has a low driving voltage, and shows a high haze when voltage is applied and a low haze when no voltage is applied. A reverse mode liquid crystal device includes a light control layer and at least a pair of electrodes, wherein the light control layer includes a polymerization product of a polymerizable material including: (A) a liquid crystal composition, (B) a perpendicular alignment agent, and (C) at least one polymerizable compound selected from polymer forming monomers and polymer forming oligomers.Type: ApplicationFiled: December 8, 2017Publication date: June 11, 2020Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Mayumi TANABE, Yoshinari MATSUMURA, Hiroaki FUJITA
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Publication number: 20200157426Abstract: A liquid crystal composite that contains a liquid crystal composition satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, large optical anisotropy and large positive dielectric anisotropy, and that is suitable for dimming, or having a suitable balance regarding at least two of the characteristics; and a liquid crystal dimming device having the liquid crystal composite. The liquid crystal composite contains a polymer and a liquid crystal composition containing a specific compound having large positive dielectric anisotropy. The liquid crystal composite may further contain a specific compound having high maximum temperature or low minimum temperature; or a specific compound having large negative dielectric anisotropy.Type: ApplicationFiled: July 18, 2018Publication date: May 21, 2020Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Naoko MATSUDA, YOSHINARI MATSUMURA, MAYUMI TANABE
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Patent number: 10407617Abstract: Shown is a liquid crystal display device including a first substrate, a second substrate and a liquid crystal composition having a nematic phase, which is placed between these substrates, wherein the liquid crystal composition includes at least one compound selected from compounds represented by formula (1) as a first component: wherein in formula (1), R1 and R2 are alkyl or the like; ring A and ring C are 1,4-phenylene or the like; ring B is 2,3-difluoro-1,4-phenylene or the like; Z1 and Z2 are a single bond or the like; and m is 1, 2 or 3, n is 0 or 1, and the sum of m and n is 3 or less.Type: GrantFiled: January 21, 2015Date of Patent: September 10, 2019Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Yoshinari Matsumura, Masayuki Saito, Yoshimasa Furusato
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Patent number: 9976083Abstract: The subject is to show a liquid crystal display device having characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, a long service life and a small flicker rate. The means concerns a liquid crystal display device including a first substrate, a second substrate and a liquid crystal composition having positive dielectric anisotropy, which is placed between these substrates, wherein the liquid crystal composition has a nematic phase and includes at least one compound selected from the group of compounds represented by formula (1) as a first component: in formula (1), R1 is alkyl or the like; ring A is 1,4-phenylene or the like; Z1 is a single bond or the like; X1 and X2 is hydrogen or fluorine; Y1 is fluorine or the like; and m is 0, 1, 2, 3 or 4.Type: GrantFiled: February 13, 2015Date of Patent: May 22, 2018Assignees: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: Yoshinari Matsumura, Masayuki Saito, Yoshimasa Furusato
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Publication number: 20170130128Abstract: The subject is to show a liquid crystal display device having characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, a long service life and a small flicker rate. The means concerns a liquid crystal display device including a first substrate, a second substrate and a liquid crystal composition having positive dielectric anisotropy, which is placed between these substrates, wherein the liquid crystal composition has a nematic phase and includes at least one compound selected from the group of compounds represented by formula (1) as a first component: in formula (1), R1 is alkyl or the like; ring A is 1,4-phenylene or the like; Z1 is a single bond or the like; X1 and X2 is hydrogen or fluorine; Y1 is fluorine or the like; and m is 0, 1, 2, 3 or 4.Type: ApplicationFiled: February 13, 2015Publication date: May 11, 2017Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: YOSHINARI MATSUMURA, MASAYUKI SAITO, YOSHIMASA FURUSATO
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Publication number: 20170015905Abstract: The means concerns a liquid crystal display device including a first substrate, a second substrate and a liquid crystal composition having a nematic phase, which is placed between these substrates, wherein the liquid crystal composition includes at least one compound selected from the group of compounds represented by formula (1) as a first component: wherein in formula (1), R1 and R2 are alkyl or the like; ring A and ring C are 1,4-phenylene or the like; ring B is 2,3-difluoro-1,4-phenylene or the like; Z1 and Z2 are a single bond or the like; and m is 1, 2 or 3, n is 0 or 1, and the sum of m and n is 3 or less.Type: ApplicationFiled: January 21, 2015Publication date: January 19, 2017Applicants: JNC CORPORATION, JNC PETROCHEMICAL CORPORATIONInventors: YOSHINARI MATSUMURA, MASAYUKI SAITO, YOSHIMASA FURUSATO
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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: 8968598Abstract: A liquid crystal composition satisfying at least one of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of the nematic phase, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or having a suitable balance regarding at least two of the characteristics is provided; and an AM device having a short response time, a suitable pretilt, a large voltage holding ratio, a large contrast ratio, a long service life and so forth is provided. A solution is a liquid crystal composition containing a specific compound having a high maximum temperature and a large dielectric anisotropy as a first component and a polymerizable compound as a second component, and a liquid crystal display device including the composition.Type: GrantFiled: December 3, 2012Date of Patent: March 3, 2015Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Masayuki Saito, Yoshinari Matsumura
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Patent number: 8821993Abstract: A liquid crystal composition has a negative dielectric anisotropy, and contains a specific bicyclic compound having a large optical anisotropy and a small viscosity as a first component and a specific compound having a large maximum temperature and 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 as a fourth component and a specific compound having a large dielectric anisotropy as a fifth component, and a liquid crystal display device includes the composition.Type: GrantFiled: September 27, 2011Date of Patent: September 2, 2014Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Norikatsu Hattori, Yoshinari Matsumura, Hiroaki Fujita
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Patent number: 8808814Abstract: The liquid crystal composition includes a specific two-ring compound having a large optical anisotropy and a small viscosity as a first component, a specific three-ring compound having a high maximum temperature and a large dielectric anisotropy as a second component, and a specific compound having a large dielectric anisotropy as a third component, and may include a specific compound having a small viscosity as a fourth component, a specific three-ring compound having a large optical anisotropy and a large dielectric anisotropy as a fifth component, and a specific compound having a large dielectric anisotropy as a sixth component, and the liquid crystal display device contains this composition.Type: GrantFiled: September 27, 2011Date of Patent: August 19, 2014Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Yoshinari Matsumura, Norikatsu Hattori
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Publication number: 20140198291Abstract: A liquid crystal composition satisfying at least one of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of the nematic phase, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or having a suitable balance regarding at least two of the characteristics is provided; and an AM device having a short response time, a suitable pretilt, a large voltage holding ratio, a large contrast ratio, a long service life and so forth is provided. A solution is a liquid crystal composition containing a specific compound having a high maximum temperature and a large dielectric anisotropy as a first component and a polymerizable compound as a second component, and a liquid crystal display device including the composition.Type: ApplicationFiled: December 3, 2012Publication date: July 17, 2014Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Masayuki Saito, Yoshinari Matsumura
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Publication number: 20130207039Abstract: A liquid crystal composition has a negative dielectric anisotropy, and contains a specific bicyclic compound having a large optical anisotropy and a small viscosity as a first component and a specific compound having a large maximum temperature and 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 as a fourth component and a specific compound having a large dielectric anisotropy as a fifth component, and a liquid crystal display device includes the composition.Type: ApplicationFiled: September 27, 2011Publication date: August 15, 2013Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Norikatsu Hattori, Yoshinari Matsumura, Hiroaki Fujita
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Publication number: 20130112918Abstract: The liquid crystal composition includes a specific two-ring compound having a large optical anisotropy and a small viscosity as a first component, a specific three-ring compound having a high maximum temperature and a large dielectric anisotropy as a second component, and a specific compound having a large dielectric anisotropy as a third component, and may include a specific compound having a small viscosity as a fourth component, a specific three-ring compound having a large optical anisotropy and a large dielectric anisotropy as a fifth component, and a specific compound having a large dielectric anisotropy as a sixth component, and the liquid crystal display device contains this composition.Type: ApplicationFiled: September 27, 2011Publication date: May 9, 2013Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Yoshinari Matsumura, Norikatsu Hattori
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Patent number: 7709066Abstract: A liquid crystal composition is provided that satisfies at least one characteristic among the characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or is properly balanced regarding at least two characteristics. An AM device is provided that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The liquid crystal composition contains a specific tricyclic compound having a large optical anisotropy as the first component and a specific tetracyclic compound having a large dielectric anisotropy as the second component, and may contain a specific bicyclic compound having a particularly small viscosity as the third component. The liquid crystal composition has a nematic phase.Type: GrantFiled: September 12, 2008Date of Patent: May 4, 2010Assignees: Chisso Corporation, Chisso Petrochemical CorporationInventors: Yoshinari Matsumura, Masayuki Saito
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Publication number: 20090091703Abstract: A liquid crystal composition is provided that satisfies at least one characteristic among the characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or is properly balanced regarding at least two characteristics. An AM device is provided that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The liquid crystal composition contains a specific tricyclic compound having a large optical anisotropy as the first component and a specific tetracyclic compound having a large dielectric anisotropy as the second component, and may contain a specific bicyclic compound having a particularly small viscosity as the third component. The liquid crystal composition has a nematic phase.Type: ApplicationFiled: September 12, 2008Publication date: April 9, 2009Applicants: CHISSO CORPORATION, CHISSO PETROCHEMICAL CORPORATIONInventors: Yoshinari MATSUMURA, Masayuki SAITO