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).

  • Patent number: 11466211
    Abstract: 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: Grant
    Filed: March 26, 2013
    Date of Patent: October 11, 2022
    Assignee: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Shinji Ogawa, Yoshinori Iwashita
  • Patent number: 11415840
    Abstract: 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: Grant
    Filed: April 25, 2019
    Date of Patent: August 16, 2022
    Assignee: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Yuichi Inoue
  • Patent number: 10975304
    Abstract: 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: Grant
    Filed: June 28, 2016
    Date of Patent: April 13, 2021
    Assignee: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Haruki Ohishi
  • Publication number: 20210026206
    Abstract: 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: Application
    Filed: April 25, 2019
    Publication date: January 28, 2021
    Applicant: DIC Corporation
    Inventors: Kazuki Kurisawa, Yuichi Inoue
  • Publication number: 20200301213
    Abstract: 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: Application
    Filed: March 30, 2017
    Publication date: September 24, 2020
    Applicant: DIC Corporation
    Inventors: Shota Kosaka, Kazuki Kurisawa
  • Publication number: 20200172811
    Abstract: 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: Application
    Filed: July 12, 2018
    Publication date: June 4, 2020
    Applicant: DIC Corporation
    Inventors: Go Sudo, Haruki Ohishi, Shirou Taniguchi, Kazuki Kurisawa
  • Patent number: 10344214
    Abstract: 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: Grant
    Filed: July 26, 2017
    Date of Patent: July 9, 2019
    Assignee: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Masanao Hayashi, Shinji Ogawa
  • Patent number: 10287502
    Abstract: 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: Grant
    Filed: May 10, 2016
    Date of Patent: May 14, 2019
    Assignee: DIC CORPORATION (TOKYO)
    Inventors: Kazuki Kurisawa, Takeshi Kuriyama, Shotaro Kawakami
  • Publication number: 20180187079
    Abstract: [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: Application
    Filed: June 23, 2016
    Publication date: July 5, 2018
    Applicant: DIC Corporation
    Inventors: Gou SUDOU, Kazuki KURISAWA
  • Patent number: 10011771
    Abstract: 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: Grant
    Filed: August 10, 2012
    Date of Patent: July 3, 2018
    Assignee: DIC CORPORATION (TOKYO)
    Inventors: Kazuki Kurisawa, Takeshi Kuriyama, Shotaro Kawakami
  • Publication number: 20180142155
    Abstract: 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: Application
    Filed: June 9, 2016
    Publication date: May 24, 2018
    Applicant: DIC Corporation
    Inventors: Kazuki Kurisawa, Masanao Hayashi
  • Publication number: 20180134961
    Abstract: 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: Application
    Filed: June 28, 2016
    Publication date: May 17, 2018
    Applicant: DIC Corporation
    Inventors: Kazuki Kurisawa, Haruki Ohishi
  • Publication number: 20170321122
    Abstract: 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: Application
    Filed: July 26, 2017
    Publication date: November 9, 2017
    Applicant: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Masanao Hayashi, Shinji Ogawa
  • Patent number: 9719017
    Abstract: 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: Grant
    Filed: January 30, 2014
    Date of Patent: August 1, 2017
    Assignee: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Masanao Hayashi, Shinji Ogawa
  • Patent number: 9464229
    Abstract: 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: Grant
    Filed: October 2, 2013
    Date of Patent: October 11, 2016
    Assignee: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Shinji Ogawa, Yoshinori Iwashita
  • Publication number: 20160251576
    Abstract: 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: Application
    Filed: May 10, 2016
    Publication date: September 1, 2016
    Applicant: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Takeshi Kuriyama, Shotaro Kawakami
  • Publication number: 20160108316
    Abstract: 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: Application
    Filed: January 30, 2014
    Publication date: April 21, 2016
    Applicant: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Masanao Hayashi, Shinji Ogawa
  • Publication number: 20160060522
    Abstract: 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: Application
    Filed: October 2, 2013
    Publication date: March 3, 2016
    Applicant: DIC Corporation
    Inventors: Kazuki Kurisawa, Shinji Ogawa, Yoshinori Iwashita
  • Publication number: 20160017227
    Abstract: 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: Application
    Filed: March 26, 2013
    Publication date: January 21, 2016
    Applicant: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Shinji Ogawa, Yoshinori Iwashita
  • Publication number: 20150299570
    Abstract: 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: Application
    Filed: April 18, 2013
    Publication date: October 22, 2015
    Applicant: DIC CORPORATION
    Inventors: Kazuki Kurisawa, Yoshikiyo Tanaka, Shotaro Kawakami