Patents by Inventor Masakazu Kaneoya
Masakazu Kaneoya 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: 20150184076Abstract: A liquid crystal composition exhibits a positive dielectric anisotropy and sufficiently low viscosity without decreasing or increasing refractive index anisotropy or nematic phase-isotropic liquid phase transition temperature, and does not cause display failures. The liquid crystal composition contains one or more compounds selected from compounds represented by general formula (LC0) and one or more compounds selected from a group of compounds represented by general formula (LC1) to general formula (LC5), in which the liquid crystal composition contains one or more compounds in which at least one of A01, A02, and A11 to A42 in general formulae (LC0) to (LC4) represents a tetrahydropyran-2,5-diyl group.Type: ApplicationFiled: July 24, 2013Publication date: July 2, 2015Applicant: DIC CORPORATIONInventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto
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Publication number: 20150159086Abstract: The nematic liquid crystal composition according to the present invention is used for, for example, producing a liquid crystal display element used in TN mode, OCB mode, ECB mode, IPS mode, or VA-IPS mode. The liquid crystal composition has a positive dielectric anisotropy and allows reductions in refractive-index anisotropy and nematic phase-isotropic liquid phase transition temperature and an increase in the lower limit temperature of a nematic phase to be suppressed. As a result, the liquid crystal composition has a sufficiently low viscosity without deteriorating the temperature range of a nematic phase. The liquid crystal composition allows high-speed response and high display quality to be realized, suppresses faulty display, and is suitably used as a practical liquid crystal composition.Type: ApplicationFiled: March 13, 2013Publication date: June 11, 2015Applicant: DIC CORPORATIONInventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojyo, Tetsuo Kusumoto
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Patent number: 9039929Abstract: A nematic liquid crystal composition of the present invention is used in liquid crystal display devices of the TN mode, OCB mode, ECB mode, IPS mode, or VA-IPS mode. The liquid crystal composition has positive dielectric anisotropy. Since the refractive index anisotropy and the nematic phase-isotropic liquid phase transition temperature are decreased and the increase in the lower limit temperature of the nematic phase is suppressed, the viscosity of the liquid crystal composition is sufficiently low without degrading the nematic phase temperature range. The liquid crystal composition also offers excellent features such as high-speed response, good display quality, and less display failures and is thus suitable as a practical liquid crystal composition.Type: GrantFiled: July 31, 2012Date of Patent: May 26, 2015Assignee: DIC CORPORATIONInventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto
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Publication number: 20150124205Abstract: The present invention provides a liquid crystal display device that allows a reduction in a voltage holding ratio (VHR) of a liquid crystal layer and an increase in an ion density (ID) in the liquid crystal layer to be suppressed and thereby addresses issues of faulty display such as white missing pixels, alignment inconsistencies, and burn-in. The liquid crystal display device according to the present invention, having a feature of suppressing the reduction in a voltage holding ratio (VHR) and the increase in an ion density (ID) in a liquid crystal layer and thereby suppressing occurrence of faulty display such as burn-in, is particularly useful as VA-mode and PSVA-mode liquid crystal display devices for active-matrix driving and may be used for liquid crystal display devices such as a liquid crystal TV, a monitor, a mobile phone, and a smart phone.Type: ApplicationFiled: July 18, 2013Publication date: May 7, 2015Inventors: Masakazu Kaneoya, Kiyofumi Kateuchi, Seiji Funakura, Katsunori Shimada
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Publication number: 20150087847Abstract: There is provided a compound having a good miscibility with another liquid crystal compound and having a combination of a low viscosity (?), high storage stability, and high T?i even after being used to produce a liquid crystal composition. In particular, it is a compound having a 2-fluorophenyloxymethane structure is provided. Since the compound having a 2-fluorophenyloxymethane structure is highly miscible with another liquid crystal compound, using the compound having a 2-fluorophenyloxymethane structure as a component of a liquid crystal composition enables a production of a liquid crystal composition which exhibits a liquid crystal phase at low viscosity and in a wide temperature range and which has a high storage stability and enables production of a liquid crystal display device which responds fast and which has excellent display characteristics.Type: ApplicationFiled: March 24, 2013Publication date: March 26, 2015Applicant: DIC CORPORATIONInventors: Kenta Tojo, Tetsuo Kusumoto, Masashi Osawa, Masakazu Kaneoya, Kiyofumi Takeuchi
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Patent number: 8916718Abstract: The present invention relates to a compound having a 2-fluorophenyloxymethane structure and useful for organic electronic materials and medical and agricultural chemicals, particularly materials for liquid crystal display elements. A problem to be solved by the invention is to provide a compound having relatively large ??, relatively high T?i, low viscosity (?), and high miscibility with other liquid crystal compounds, and also provide a liquid crystal composition containing the compound as a constituent component. The present invention provides a compound having a 2-fluorophenyloxymethane structure and also provides a liquid crystal composition containing the compound and a liquid crystal display device using the liquid crystal composition.Type: GrantFiled: May 22, 2012Date of Patent: December 23, 2014Assignee: DIC CorporationInventors: Kenta Tojo, Kiyofumi Takeuchi, Masashi Osawa, Masakazu Kaneoya, Tetsuo Kusumoto
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Patent number: 8885124Abstract: The present invention provides a liquid crystal display device capable of preventing a decrease in voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and resolving the problem of display defects such as white spots, alignment unevenness, image sticking, and the like. The liquid crystal display device of the present invention is characterized by preventing a decrease in voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and suppressing the occurrence of display defects such as image sticking and the like, and is thus particularly useful for a VA-mode or PSVA-mode liquid crystal display device for active matrix driving, and can be applied to liquid crystal display devices such as a liquid crystal TV, a monitor, a cellular phone, a smart phone, and the like.Type: GrantFiled: December 14, 2012Date of Patent: November 11, 2014Assignee: DIC CorporationInventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Seiji Funakura, Katsunori Shimada
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Patent number: 8860912Abstract: There is provided a liquid crystal display device capable of preventing a decrease in voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and resolving the problem of display defects such as white spots, alignment unevenness, image sticking, and the like. The liquid crystal display device prevents a decrease in voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and suppressing the occurrence of display defects such as image sticking and the like. The liquid crystal display device is thus useful for a VA-mode or PSVA-mode liquid crystal display device for active matrix driving. The application of the device includes liquid crystal display devices such as liquid crystal TVs, monitors, cellular phones, and smart phones.Type: GrantFiled: January 29, 2013Date of Patent: October 14, 2014Assignee: DIC CorporationInventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Akira Kimura, Seiji Funakura, Katsunori Shimada
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Publication number: 20140275577Abstract: The present invention relates to a compound having a 2-fluorophenyloxymethane structure and useful for organic electronic materials and medical and agricultural chemicals, particularly materials for liquid crystal display elements. A problem to be solved by the invention is to provide a compound having relatively large ??, relatively high T?i, low viscosity (?), and high miscibility with other liquid crystal compounds, and also provide a liquid crystal composition containing the compound as a constituent component. The present invention provides a compound having a 2-fluorophenyloxymethane structure and also provides a liquid crystal composition containing the compound and a liquid crystal display device using the liquid crystal composition.Type: ApplicationFiled: May 22, 2012Publication date: September 18, 2014Applicant: DIC CORPORATIONInventors: Kenta Tojo, Kiyofumi Takeuchi, Masashi Osawa, Masakazu Kaneoya, Tetsuo Kusumoto
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Publication number: 20140225036Abstract: A nematic liquid crystal composition of the present invention is used in liquid crystal display devices of the TN mode, OCB mode, ECB mode, IPS mode, or VA-IPS mode. The liquid crystal composition has positive dielectric anisotropy. Since the refractive index anisotropy and the nematic phase-isotropic liquid phase transition temperature are decreased and the increase in the lower limit temperature of the nematic phase is suppressed, the viscosity of the liquid crystal composition is sufficiently low without degrading the nematic phase temperature range. The liquid crystal composition also offers excellent features such as high-speed response, good display quality, and less display failures and is thus suitable as a practical liquid crystal composition.Type: ApplicationFiled: July 31, 2012Publication date: August 14, 2014Applicant: DIC CORPORATIONInventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Masashi Osawa, Kenta Tojo, Tetsuo Kusumoto
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Publication number: 20140211137Abstract: The present invention provides a liquid crystal display device capable of preventing a decrease in voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and resolving the problem of display defects such as white spots, alignment unevenness, image sticking, and the like. The liquid crystal display device of the present invention is characterized by preventing a decrease in voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and suppressing the occurrence of display defects such as image sticking and the like, and is thus particularly useful for a VA-mode or PSVA-mode liquid crystal display device for active matrix driving, and can be applied to liquid crystal display devices such as a liquid crystal TV, a monitor, a cellular phone, a smart phone, and the like.Type: ApplicationFiled: December 14, 2012Publication date: July 31, 2014Applicant: DIC CORPORATIONInventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Seiji Funakura, Katsunori Shimada
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Publication number: 20140211138Abstract: There is provided a liquid crystal display device capable of preventing a decrease in voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and resolving the problem of display defects such as white spots, alignment unevenness, image sticking, and the like. The liquid crystal display device prevents a decrease in voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and suppressing the occurrence of display defects such as image sticking and the like. The liquid crystal display device is thus useful for a VA-mode or PSVA-mode liquid crystal display device for active matrix driving. The application of the device includes liquid crystal display devices such as liquid crystal TVs, monitors, cellular phones, and smart phones.Type: ApplicationFiled: January 29, 2013Publication date: July 31, 2014Applicant: DIC CORPORATIONInventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Akira Kimura, Seiji Funakura, Katsunori Shimada
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Publication number: 20130300996Abstract: Provided is a liquid crystal display device of the VAIPS mode which uses a liquid crystal material having positive dielectric anisotropy and which has a fast response speed and excellent viewing angle characteristics without having a special cell structure such as pixel partitioning.Type: ApplicationFiled: September 22, 2011Publication date: November 14, 2013Applicant: DIC CORPORATIONInventors: Kiyofumi Takeuchi, Masakazu Kaneoya
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Publication number: 20130265527Abstract: Provided is a liquid crystal display device of VAIPS mode, which uses a liquid crystal material having negative dielectric anisotropy (??<0), and has a high response speed, a wide viewing angle, a high transmittance at the time of light transmission, a high black level at the time of light blockage, and an excellent contrast ratio.Type: ApplicationFiled: September 22, 2011Publication date: October 10, 2013Applicant: DIC CORPORATIONInventors: Kiyofumi Takeuchi, Masakazu Kaneoya
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Patent number: 5238603Abstract: A liquid crystal compound having specific features suitable to use for a display mode utilizing ferroelectric liquid crystals, particularly a large spontaneous polarization value and a liquid crystal composition using the compound are provided, which compound is an optically active liquid crystalline compound of the formula ##STR1## wherein l and m each are 0 or 1; at least one of R.sup.1 and R.sup.2 is an optically active alkoxy group of the formula ##STR2## wherein R.sup.3 is 2 or 3C alkyl and R.sup.4 is 3-18C alkyl, but R.sup.3 .noteq.R.sup.4 and the other thereof is 1-20C alkyl, alkoxy or alkanoyloxy, halogen or cyano; and A is a specified two or three rings compound.Type: GrantFiled: April 7, 1992Date of Patent: August 24, 1993Assignee: Chisso CorporationInventors: Kazutoshi Miyazawa, Naoyuki Yoshida, Masakazu Kaneoya
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Patent number: 5076947Abstract: An optically active compound having a high twistability and almost no change in the intrinsic pitch depending on temperature, and a liquid crystal composition comprising the compound are provided, which optically active compound is expressed by the formula ##STR1## wherein R.sup.1 and R.sup.2 each represent 1-20C alkyl or alkoxy, halogen or H; l, m and n each represent 0 or 1; and ##STR2## wherein Y represents H, halogen or cyano.Type: GrantFiled: June 6, 1989Date of Patent: December 31, 1991Assignee: Chisso CorporationInventors: Masakazu Kaneoya, Manabu Uchida, Naoyuki Yoshida, Kazutoshi Miyazawa
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Patent number: 4971909Abstract: The present invention provides a process for producing optically active compounds by a biochemical method in which specific compounds having pyridine skeletons and hydroxyl groups are reacted with esters in the presence of hydrolases.The compounds have the following general formula: ##STR1## wherein X is selected from substituted pyridyl groups. Y is selected from hydrogen and halogen atoms, a cyano group, and a trifluoromethyl group. R is an alkylene group having 1-20 carbon atoms, and n is 0 or 1. Q is an alkylene group having 1-20 carbon atoms and m is 0 or 1.Type: GrantFiled: August 2, 1988Date of Patent: November 20, 1990Assignee: Chisso CorporationInventors: Masakazu Kaneoya, Naoyuki Yoshida, Manabu Uchida
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Patent number: 4965018Abstract: A novel optically active pyridylethanol derivative having a high twistability and also a superior temperature characteristic is provided, which derivative is expressed by the formula ##STR1## wherein R is an alkyl group of alkoxy group each of 1 to 20 carbon atoms or hydrogen atom, m and n each represent 0 or 1, ##STR2## each independently represent ##STR3## wherein Y is any one of H, halogen atom or CN and ##STR4## is a pyridine ring the N atom of which may be present at an optionally chosen site thereof.Type: GrantFiled: March 21, 1989Date of Patent: October 23, 1990Assignee: Chisso CorporationInventors: Manabu Uchida, Naoyuki Yoshida, Masakazu Kaneoya
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Patent number: 4962031Abstract: The present invention provides a process for producing optically active compounds by a biochemical method in which specific compounds having hydroxyl groups are reacted with esters in the presence of hydrolases. The compounds have the following general formula: ##STR1## wherein X is selected from halogen atoms and a cyano group. Y is selected from the group constituting substituted phenyl groups, halogen atoms, cyano, trifluoromethyl and amino groups and alkylamino and alkyloxycarbonyl groups in which alkyl groups have 1-20 carbon atoms. R is an alkylene group having 1-20 carbon atoms and n is 0 or 1.Type: GrantFiled: May 2, 1988Date of Patent: October 9, 1990Assignee: Chisso CorporationInventors: Naoyuki Yoshida, Masakazu Kaneoya, Manabu Uchida, Hiroshi Morita
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Patent number: 4904409Abstract: An optically active compound having characteristics necessary for realizing liquid crystal compositions provided with suitable characteristics, particularly a negative temperature characteristic and a very high twistability, and a liquid crystal composition containing the compound are provided, which optically active compound is expressed by the formula ##STR1## wherein R.sup.1 and R.sup.2 are 1-20 C alkyl or alkoxy or H; l, m and n are 0 or 1; X is F, Cl, Br or CN; and ##STR2## each independently represent ##STR3## wherein Y is H, halogen or CN.Type: GrantFiled: September 1, 1988Date of Patent: February 27, 1990Assignee: Chisso CorporationInventors: Kazutoshi Miyazawa, Ohno Kouji, Naoyuki Yoshida, Masakazu Kaneoya