Patents by Inventor Kazuki Kurisawa
Kazuki Kurisawa 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: 11466211Abstract: An object of the present invention is to provide a liquid crystal composition suitable for producing liquid crystal display elements which reduces the risk of the formation of droplet traces during production and allows a liquid crystal material to be ejected at a constant rate during an ODF process without deteriorating the properties of the liquid crystal display element, such as dielectric anisotropy, viscosity, nematic-phase upper-limit temperature, nematic-phase stability at a low temperature, and ?1, and the image sticking resistance of the display element, and a liquid crystal display element including the liquid crystal composition. Provided are a liquid crystal composition having a negative dielectric anisotropy, the liquid crystal composition including one or more compounds represented by General Formula (I), one or more compounds represented by General Formula (II), and the compound represented by Formula (IIIb-1) and a liquid crystal display element including the liquid crystal composition.Type: GrantFiled: March 26, 2013Date of Patent: October 11, 2022Assignee: DIC CORPORATIONInventors: Kazuki Kurisawa, Shinji Ogawa, Yoshinori Iwashita
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Patent number: 11415840Abstract: The present invention provides a liquid crystal display device that includes a first substrate having an electrode A formed thereon; a second substrate having an electrode B formed thereon and being disposed to oppose the first substrate; and a liquid crystal layer disposed between the first substrate and the second substrate and substantially vertically aligned with respect to the first and second substrates when no voltage is applied between electrodes, in which the electrode A has a fishbone pattern having a branched portion, and a space (S ?m) between adjacent branches of branches of the fishbone pattern and an inter-substrate distance (d ?m) between the first substrate and the second substrate satisfy a relationship of formula (1): (d?0.6)/1.25<S<(d+1.1)/1.25??formula (1).Type: GrantFiled: April 25, 2019Date of Patent: August 16, 2022Assignee: DIC CORPORATIONInventors: Kazuki Kurisawa, Yuichi Inoue
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Patent number: 10975304Abstract: An object of the present invention is to provide a composition that realizes high ?n, has a wide liquid crystal phase temperature range, small viscosity, excellent low-temperature solubility, and high resistivity and voltage holding ratio, and is stable against heat and light, and to provide a liquid crystal composition having an excellent lens effect and excellent chemical stability using the composition, and a liquid crystal display device and a liquid crystal lens that use the liquid crystal composition. The present invention provides a liquid crystal composition that contains one or two or more compounds represented by general formula (i) and one or two or more compounds represented by general formula (ii), a liquid crystal display device using the liquid crystal composition, a liquid crystal lens using the liquid crystal composition, and a birefringence lens for stereoscopic image display using the liquid crystal composition.Type: GrantFiled: June 28, 2016Date of Patent: April 13, 2021Assignee: DIC CORPORATIONInventors: Kazuki Kurisawa, Haruki Ohishi
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Publication number: 20210026206Abstract: The present invention provides a liquid crystal display device that includes a first substrate having an electrode A formed thereon; a second substrate having an electrode B formed thereon and being disposed to oppose the first substrate; and a liquid crystal layer disposed between the first substrate and the second substrate and substantially vertically aligned with respect to the first and second substrates when no voltage is applied between electrodes, in which the electrode A has a fishbone pattern having a branched portion, and a space (S ?m) between adjacent branches of branches of the fishbone pattern and an inter-substrate distance (d ?m) between the first substrate and the second substrate satisfy a relationship of formula (1): (d?0.6)/1.25<S<(d+1.1)/1.Type: ApplicationFiled: April 25, 2019Publication date: January 28, 2021Applicant: DIC CorporationInventors: Kazuki Kurisawa, Yuichi Inoue
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Publication number: 20200301213Abstract: The liquid crystal display device including a liquid crystal layer between a first substrate and a second substrate, the first substrate having a common electrode and a color filter, the second substrate having a plurality of pixels and having a pixel electrode in each pixel, the liquid crystal layer containing a liquid crystal composition, wherein the liquid crystal display device has no alignment film on one or both of the first substrate and the second substrate, but has an alignment control layer formed of a polymer of two or more polymerizable compounds, and contains a compound represented by the general formula (III).Type: ApplicationFiled: March 30, 2017Publication date: September 24, 2020Applicant: DIC CorporationInventors: Shota Kosaka, Kazuki Kurisawa
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Publication number: 20200172811Abstract: A problem to be solved by the present invention is to provide a liquid crystal composition having negative dielectric anisotropy (??), large refractive index anisotropy (?n), a high nematic phase-isotopic liquid phase transition temperature (TNI), a low solid phase-nematic phase transition temperature (TCN), sufficiently low rotational viscosity (?1), and large elastic constant (K33), and also to provide a VA-mode, FFS-mode, or IPS-mode liquid crystal display device using the liquid crystal composition, satisfying a high response speed, high VHR, and excellent low-temperature storage stability, and having no or very few display defects. According to the liquid crystal composition of the present invention, the problem is solved by a liquid crystal composition containing compounds represented by general formula (S1), general formula (S2), and general formula (S3).Type: ApplicationFiled: July 12, 2018Publication date: June 4, 2020Applicant: DIC CorporationInventors: Go Sudo, Haruki Ohishi, Shirou Taniguchi, Kazuki Kurisawa
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Patent number: 10344214Abstract: A liquid crystal display device which enables reductions in image sticking and droplet stains caused in production thereof without degradation of properties such as dielectric anisotropy, viscosity, the upper limit of the temperature of nematic phase, and rotational viscosity (?1); and a method for manufacturing such a liquid crystal display device.Type: GrantFiled: July 26, 2017Date of Patent: July 9, 2019Assignee: DIC CORPORATIONInventors: Kazuki Kurisawa, Masanao Hayashi, Shinji Ogawa
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Patent number: 10287502Abstract: A liquid crystal composition containing a polymerizable compound of the present invention has excellent characteristics of being able to prepare a PSA type liquid crystal display element with no problem of depositing in a wide temperature range, having high polymerization speed, high liquid crystal alignment regulation force after polymerization, excellent display qualities with no display unevenness, and excellent display characteristics with no defects in display characteristics such as image sticking and is appropriate as a liquid crystal composition in a practical use. Further, the liquid crystal display element with the above-described liquid crystal composition can be appropriately used for a PSA type liquid crystal display element.Type: GrantFiled: May 10, 2016Date of Patent: May 14, 2019Assignee: DIC CORPORATION (TOKYO)Inventors: Kazuki Kurisawa, Takeshi Kuriyama, Shotaro Kawakami
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Publication number: 20180187079Abstract: [Object] An object to be achieved by the present invention is to provide a liquid crystal display device that uses a liquid crystal composition having negative dielectric anisotropy, in which the liquid crystal composition can realize excellent display properties when used in the liquid crystal display device without degrading the image-sticking properties of the display device while realizing various liquid crystal display properties such as dielectric anisotropy, viscosity, nematic phase upper limit temperature, low-temperature nematic phase stability, ?1, etc. [Solution] A liquid crystal composition is characterized in that it contains, as a first component, at least one compound selected from the group consisting of compounds represented by general formula (i), and, as a second component, at least one compound selected from the group consisting of compounds represented by general formula (ii).Type: ApplicationFiled: June 23, 2016Publication date: July 5, 2018Applicant: DIC CorporationInventors: Gou SUDOU, Kazuki KURISAWA
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Patent number: 10011771Abstract: A liquid crystal composition containing a polymerizable compound of the present invention has excellent characteristics of being able to prepare a PSA type liquid crystal display element with no problem of depositing in a wide temperature range, having high polymerization speed, high liquid crystal alignment regulation force after polymerization, excellent display qualities with no display unevenness, and excellent display characteristics with no defects in display characteristics such as image sticking and is appropriate as a liquid crystal composition in a practical use. Further, the liquid crystal display element with the above-described liquid crystal composition can be appropriately used for a PSA type liquid crystal display element.Type: GrantFiled: August 10, 2012Date of Patent: July 3, 2018Assignee: DIC CORPORATION (TOKYO)Inventors: Kazuki Kurisawa, Takeshi Kuriyama, Shotaro Kawakami
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Publication number: 20180142155Abstract: A liquid crystal display device which suppresses the occurrence of image sticking and dropping marks during manufacture without degrading the characteristics such as dielectric anisotropy, viscosity, nematic phase upper limit temperature, rotational viscosity (?1), etc., and a method for manufacturing the liquid crystal display device are provided. The liquid crystal display device includes a liquid crystal layer which contains a liquid crystal composition and which is held between a substrate having a common electrode and a color filer and a substrate having a plurality of pixels and pixel electrodes of the respective pixels, wherein one or both of the substrates have, without having an alignment film, an alignment control layer formed by using one or more tri- or higher-functional (meth)acrylate compounds and one or more di- or mono-functional (meth)acrylate compounds. The liquid crystal display device is applied to a liquid crystal display device for liquid crystal TV or the like.Type: ApplicationFiled: June 9, 2016Publication date: May 24, 2018Applicant: DIC CorporationInventors: Kazuki Kurisawa, Masanao Hayashi
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Publication number: 20180134961Abstract: An object of the present invention is to provide a composition that realizes high ?n, has a wide liquid crystal phase temperature range, small viscosity, excellent low-temperature solubility, and high resistivity and voltage holding ratio, and is stable against heat and light, and to provide a liquid crystal composition having an excellent lens effect and excellent chemical stability using the composition, and a liquid crystal display device and a liquid crystal lens that use the liquid crystal composition. The present invention provides a liquid crystal composition that contains one or two or more compounds represented by general formula (i) and one or two or more compounds represented by general formula (ii), a liquid crystal display device using the liquid crystal composition, a liquid crystal lens using the liquid crystal composition, and a birefringence lens for stereoscopic image display using the liquid crystal composition.Type: ApplicationFiled: June 28, 2016Publication date: May 17, 2018Applicant: DIC CorporationInventors: Kazuki Kurisawa, Haruki Ohishi
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Publication number: 20170321122Abstract: A liquid crystal display device which enables reductions in image sticking and droplet stains caused in production thereof without degradation of properties such as dielectric anisotropy, viscosity, the upper limit of the temperature of nematic phase, and rotational viscosity (?1); and a method for manufacturing such a liquid crystal display device.Type: ApplicationFiled: July 26, 2017Publication date: November 9, 2017Applicant: DIC CORPORATIONInventors: Kazuki Kurisawa, Masanao Hayashi, Shinji Ogawa
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Patent number: 9719017Abstract: There is provided a liquid crystal display device which enables reductions in image sticking and droplet stains caused in production thereof without degradation of properties such as dielectric anisotropy, viscosity, the upper limit of the temperature of nematic phase, and rotational viscosity (?1); and there is also provided a method for manufacturing such a liquid crystal display device.Type: GrantFiled: January 30, 2014Date of Patent: August 1, 2017Assignee: DIC CORPORATIONInventors: Kazuki Kurisawa, Masanao Hayashi, Shinji Ogawa
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Patent number: 9464229Abstract: There is provided an FFS mode liquid crystal display device that uses a liquid crystal composition which has a negative dielectric anisotropy and can achieve good display properties by being used for FFS mode liquid crystal display devices without degrading the image sticking property of display devices and various properties of liquid crystal display devices, such as dielectric anisotropy, viscosity, nematic phase upper limit temperature, low-temperature nematic phase stability, and ?1. The liquid crystal composition contains at least one compound selected from the group of compounds represented by general formula (I) below, at least one compound selected from the group of compounds represented by general formula (II) below, and at least one compound selected from the group of compounds represented by general formula (III) below.Type: GrantFiled: October 2, 2013Date of Patent: October 11, 2016Assignee: DIC CORPORATIONInventors: Kazuki Kurisawa, Shinji Ogawa, Yoshinori Iwashita
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Publication number: 20160251576Abstract: A liquid crystal composition containing a polymerizable compound of the present invention has excellent characteristics of being able to prepare a PSA type liquid crystal display element with no problem of depositing in a wide temperature range, having high polymerization speed, high liquid crystal alignment regulation force after polymerization, excellent display qualities with no display unevenness or the like, and excellent display characteristics with no defects in display characteristics such as image sticking and is appropriate as a liquid crystal composition in a practical use. Further, the liquid crystal display element with the above-described liquid crystal composition can be appropriately used for a PSA type liquid crystal display element.Type: ApplicationFiled: May 10, 2016Publication date: September 1, 2016Applicant: DIC CORPORATIONInventors: Kazuki Kurisawa, Takeshi Kuriyama, Shotaro Kawakami
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Publication number: 20160108316Abstract: There is provided a liquid crystal display device which enables reductions in image sticking and droplet stains caused in production thereof without degradation of properties such as dielectric anisotropy, viscosity, the upper limit of the temperature of nematic phase, and rotational viscosity (?1); and there is also provided a method for manufacturing such a liquid crystal display device.Type: ApplicationFiled: January 30, 2014Publication date: April 21, 2016Applicant: DIC CORPORATIONInventors: Kazuki Kurisawa, Masanao Hayashi, Shinji Ogawa
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Publication number: 20160060522Abstract: There is provided an FFS mode liquid crystal display device that uses a liquid crystal composition which has a negative dielectric anisotropy and can achieve good display properties by being used for FFS mode liquid crystal display devices without degrading the image sticking property of display devices and various properties of liquid crystal display devices, such as dielectric anisotropy, viscosity, nematic phase upper limit temperature, low-temperature nematic phase stability, and ?1. The liquid crystal composition contains at least one compound selected from the group of compounds represented by general formula (I) below, at least one compound selected from the group of compounds represented by general formula (II) below, and at least one compound selected from the group of compounds represented by general formula (III) below.Type: ApplicationFiled: October 2, 2013Publication date: March 3, 2016Applicant: DIC CorporationInventors: Kazuki Kurisawa, Shinji Ogawa, Yoshinori Iwashita
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Publication number: 20160017227Abstract: An object of the present invention is to provide a liquid crystal composition suitable for producing liquid crystal display elements which reduces the risk of the formation of droplet traces during production and allows a liquid crystal material to be ejected at a constant rate during an ODF process without deteriorating the properties of the liquid crystal display element, such as dielectric anisotropy, viscosity, nematic-phase upper-limit temperature, nematic-phase stability at a low temperature, and ?1, and the image sticking resistance of the display element, and a liquid crystal display element including the liquid crystal composition. Provided are a liquid crystal composition having a negative dielectric anisotropy, the liquid crystal composition including one or more compounds represented by General Formula (I), one or more compounds represented by General Formula (II), and the compound represented by Formula (IIIb-1) and a liquid crystal display element including the liquid crystal composition.Type: ApplicationFiled: March 26, 2013Publication date: January 21, 2016Applicant: DIC CORPORATIONInventors: Kazuki Kurisawa, Shinji Ogawa, Yoshinori Iwashita
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Publication number: 20150299570Abstract: A polymerizable liquid crystal composition of the present invention contains at least two polymerizable compounds having different rates of polymerization reaction and a liquid crystal compound. The polymerizable liquid crystal composition is characterized in that the rate of polymerization reaction of the polymerizable compounds contained in the composition can be easily made suitable for the specification of a UV irradiation lamp, the pretilt angle, which affects the display performance, can be easily controlled, a problem of unpolymerization of polymerizable compounds, which affects display unevenness, image sticking, etc., can be solved, and thus a PSA liquid crystal display element having good performance and high reliability can be produced. The polymerizable liquid crystal composition is suitable as a practical liquid crystal composition.Type: ApplicationFiled: April 18, 2013Publication date: October 22, 2015Applicant: DIC CORPORATIONInventors: Kazuki Kurisawa, Yoshikiyo Tanaka, Shotaro Kawakami