Patents by Inventor Katsunori Shimada

Katsunori Shimada 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: 10011773
    Abstract: The present invention relates to a liquid crystal display device that includes a particular color filter containing a material containing chiral liquid crystals and a particular dye and/or pigment. The present invention provides a liquid crystal display device that can prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and solve the problem of display defects, such as white spots, variations in alignment, and burn-in. Because liquid crystal display devices according to the present invention characteristically prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and reduces the occurrence of display defects, such as burn-in, the liquid crystal display devices are particularly useful as liquid crystal display devices in IPS mode and FFS mode for active-matrix driving and can be applied to household electrical appliances, automobiles, production facilities, measuring and analytical instruments, and communication devices.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: July 3, 2018
    Assignee: DIC CORPORATION
    Inventors: Hidenari Akiyama, Isa Nishiyama, Seiji Fanakura, Katsunori Shimada
  • Patent number: 9994580
    Abstract: Provided is a phthalocyanine compound which has a green hue without having a halogen atom, and exhibits high luminance and an excellent coloring force at the time of being used for preparing a green pixel unit of a color filter. The phthalocyanine compound of the present invention has green hues without having a halogen atom, and exhibits high luminance and an excellent coloring force at the time of being used for preparing the green pixel unit of the color filter. In addition, the phthalocyanine compound can be used not only for the color filter, but also as a colorant for a wide range of applications as a general colorant such as printing ink, paint, colored plastic, toner, and ink for ink jet.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: June 12, 2018
    Assignee: DIC CORPORATION
    Inventors: Hitoshi Kondo, Yusuke Ozaki, Katsunori Shimada
  • Patent number: 9908991
    Abstract: An organic pigment composition that allows a colored item to have good color saturation and high resistance to a change in hue even when subjected to a thermal history for a prolonged period. A color filter includes an organic pigment composition for color filters in a pixel portion. The organic pigment composition for color filters includes an organic pigment (A) having an average primary particle size of 100 nm or less; and a copolymer (B) of a (meth)acrylic acid ester having a phosphate group and another (meth)acrylic acid ester having no phosphate group, the amount of a nonvolatile component of the copolymer (B) being 0.1 to 15 parts relative to 100 parts of the organic pigment (A) on a mass basis.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: March 6, 2018
    Assignee: DIC CORPORATION
    Inventors: Masanori Fujimaki, Mayumi Tokuoka, Akira Kimura, Katsunori Shimada, Kayoko Fukushima, Masaharu Takahashi
  • Patent number: 9904166
    Abstract: Provided is a green pigment composition which includes a halogenated zinc phthalocyanine pigment and a brominated chlorinated zinc phthalocyanine derivative having a phthalimide skeleton bonded by an alkylene group, and which enables a great enhancement in contrast without decreasing luminance and coloring power, and a color filter including the green pigment composition. The green pigment composition for color filters includes from 0.1 to 10 parts of a halogenated zinc phthalocyanine pigment derivative substituted with a functional group having a phthalimide skeleton bonded by an alkylene group per 100 parts of a halogenated zinc phthalocyanine pigment, in terms of a mass, and a color filter includes the green pigment composition for color filters.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: February 27, 2018
    Assignee: DIC CORPORATION
    Inventors: Keisuke Sakamoto, Akira Kimura, Katsunori Shimada
  • Patent number: 9873796
    Abstract: Provided are a green pigment composition for a color filter having high brightness and wide color reproduction range in a liquid crystal display, and a color filter formed including the same. A halogenated zinc phthalocyanine containing an average of 10 to 14 halogen atoms per molecule in which an average of 8 to 12 are bromine atoms and an average of 2 to 5 are chlorine atoms is used. As a result, film thickness is less than when using Pigment Green 7 and, thus, a color filter with high brightness and wide color reproduction range can be provided.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: January 23, 2018
    Assignee: DIC Corporation
    Inventors: Keisuke Sakamoto, Akira Kimura, Katsunori Shimada
  • Publication number: 20170327510
    Abstract: Provided is a phthalocyanine compound which has a green hue without having a halogen atom, and exhibits high luminance and an excellent coloring force at the time of being used for preparing a green pixel unit of a color filter. The phthalocyanine compound of the present invention has green hues without having a halogen atom, and exhibits high luminance and an excellent coloring force at the time of being used for preparing the green pixel unit of the color filter. In addition, the phthalocyanine compound can be used not only for the color filter, but also as a colorant for a wide range of applications as a general colorant such as printing ink, paint, colored plastic, toner, and ink for ink jet.
    Type: Application
    Filed: July 7, 2016
    Publication date: November 16, 2017
    Inventors: Hitoshi KONDO, Yusuke OZAKI, Katsunori SHIMADA
  • Patent number: 9809752
    Abstract: The present invention relates to a liquid crystal display device that includes a particular color filter containing a material containing chiral liquid crystals and a particular pigment. The present invention provides a liquid crystal display device that can prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and solve the problem of display defects, such as white spots, variations in alignment, and burn-in. Because liquid crystal display devices according to the present invention characteristically prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and reduces the occurrence of display defects, such as burn-in, the liquid crystal display devices are particularly useful as liquid crystal display devices in IPS mode and FFS mode for active-matrix driving and can be applied to household electrical appliances, automobiles, production facilities, measuring and analytical instruments, and communication devices.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: November 7, 2017
    Assignee: DIC CORPORATION
    Inventors: Kazuaki Hatsusaka, Hidenari Akiyama, Akira Kimura, Seiji Funakura, Katsunori Shimada
  • Publication number: 20170299961
    Abstract: Provided is a green pigment composition which includes a halogenated zinc phthalocyanine pigment and a brominated chlorinated zinc phthalocyanine derivative having a phthalimide skeleton bonded by an alkylene group, and which enables a great enhancement in contrast without decreasing luminance and coloring power, and a color filter including the green pigment composition. The green pigment composition for color filters includes from 0.1 to 10 parts of a halogenated zinc phthalocyanine pigment derivative substituted with a functional group having a phthalimide skeleton bonded by an alkylene group per 100 parts of a halogenated zinc phthalocyanine pigment, in terms of a mass, and a color filter includes the green pigment composition for color filters.
    Type: Application
    Filed: February 16, 2016
    Publication date: October 19, 2017
    Applicant: DIC Corporation
    Inventors: Keisuke Sakamoto, Akira Kimura, Katsunori Shimada
  • Patent number: 9715051
    Abstract: There is provided a liquid crystal display device in which a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) are prevented and problems of display defects such as white streaks, alignment unevenness, and image sticking are overcome. In the liquid crystal display device, a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) are prevented and display defects such as image sticking are suppressed. Therefore, the liquid crystal display device is useful for active matrix liquid crystal display apparatuses that use a VA mode or a PSVA mode and can be applied to liquid crystal display apparatuses of liquid crystal televisions, monitors, cellular phones, smart phones, and the like.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: July 25, 2017
    Assignee: DIC CORPORATION
    Inventors: Shinji Ogawa, Yoshinori Iwashita, Seiji Funakura, Katsunori Shimada
  • Patent number: 9683171
    Abstract: There is provided a liquid crystal display device which prevents a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) therein and which overcomes problems of defective display such as dropouts, uneven alignment, and screen burn-in. The liquid crystal display device of the present invention prevents a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) therein and reduces defective display such as screen burn-in; hence, such a liquid crystal display device is properly used as liquid crystal display devices of a VA mode and PSVA mode which involve active matrix driving and can be applied to liquid crystal display devices of liquid crystal TV sets, monitors, mobile phones, and smartphones.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: June 20, 2017
    Assignee: DIC CORPORATION
    Inventors: Shinji Ogawa, Yoshinori Iwashita, Seiji Funakura, Katsunori Shimada
  • Patent number: 9593280
    Abstract: There is provided a liquid crystal display device that may limit a reduction in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) in the liquid crystal layer and thereby address issues of faulty display such as white missing pixels, alignment inconsistencies, and burn-in. The liquid crystal display device according to the present invention, which may limit a reduction in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) in the liquid crystal layer and thereby reduce the risk of faulty display such as burn-in, can be suitably used, in particular, as an IPS-mode or FFS-mode liquid crystal display device for active-matrix driving and may also be used as a liquid crystal display device for liquid crystal display televisions, monitors, mobile phones, smart phones, or the like.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: March 14, 2017
    Assignee: DIC CORPORATION
    Inventors: Takeshi Kuriyama, Jouji Kawamura, Seiji Funakura, Isao Oshiumi, Katsunori Shimada
  • Publication number: 20170009075
    Abstract: Provided are a green pigment composition for a color filter having high brightness and wide color reproduction range in a liquid crystal display, and a color filter formed including the same. A halogenated zinc phthalocyanine containing an average of 10 to 14 halogen atoms per molecule in which an average of 8 to 12 are bromine atoms and an average of 2 to 5 are chlorine atoms is used. As a result, film thickness is less than when using Pigment Green 7 and, thus, a color filter with high brightness and wide color reproduction range can be provided.
    Type: Application
    Filed: September 30, 2014
    Publication date: January 12, 2017
    Inventors: Keisuke SAKAMOTO, Akira KIMURA, Katsunori SHIMADA
  • Patent number: 9487700
    Abstract: The present invention relates to a liquid crystal display device that uses a particular liquid crystal composition and a color filter that uses a particular pigment. The present invention provides a liquid crystal display device that prevents a decrease in voltage holding ratio (VHR) and an increase in ion density (ID) of a liquid crystal layer and resolves the problems of display defects, such as missing dots, alignment variation, and ghosting. Since the liquid crystal display device of the present invention prevents a decrease in voltage holding ratio (VHR) and an increase in ion density (ID) of a liquid crystal layer and resolves the problems of display defects, such as ghosting, it is particularly useful for active matrix drive VA-mode and PSVA-mode liquid crystal display devices and can be applied to liquid crystal display devices such as liquid crystal televisions, monitors, cellular phones, and smart phones.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: November 8, 2016
    Assignee: DIC CORPORATION
    Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Seiji Funakura, Isao Oshiumi, Katsunori Shimada
  • Patent number: 9459488
    Abstract: The present invention provides a liquid crystal display device in which a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) are prevented and problems of display defects such as white streaks, alignment unevenness, and image sticking are overcome. The liquid crystal display device of the present invention in which a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in the ion density (ID) are prevented and problems of display defects such as image sticking are overcome is particularly useful for active matrix driving liquid crystal display devices with an IPS mode and an FFS mode and can be applied to liquid crystal display devices of liquid crystal televisions, monitors, cellular phones, and smart phones.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: October 4, 2016
    Assignee: DIC CORPORATION
    Inventors: Takeshi Kuriyama, Jouji Kawamura, Akira Kimura, Seiji Funakura, Katsunori Shimada
  • Patent number: 9441158
    Abstract: The present invention provides a liquid crystal display device which prevents a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) therein and which overcomes problems of defective display such as dropouts, uneven alignment, and screen burn-in. The liquid crystal display device of the present invention prevents a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) therein and reduces defective display such as screen burn-in; hence, such a liquid crystal display device is properly used as liquid crystal display devices of a VA mode and PSVA mode which involve active matrix driving and can be applied to liquid crystal display devices of liquid crystal TV sets, monitors, mobile phones, and smartphones.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: September 13, 2016
    Assignee: DIC CORPORATION
    Inventors: Shinji Ogawa, Yoshinori Iwashita, Seiji Funakura, Isao Oshiumi, Katsunori Shimada
  • Patent number: 9442321
    Abstract: There is provided a liquid crystal display apparatus that may limit a reduction in the voltage holding ratio (VHR) of a liquid crystal layer and limit an increase in the ion density (ID) in the liquid crystal layer and address issues of faulty display such as white missing pixels, alignment inconsistencies, and burn-in. The liquid crystal display apparatus includes a first substrate, a second substrate, a liquid crystal composition layer held between the first substrate and the second substrate, a color filter including a black matrix and at least RGB three-color pixel portions, a pixel electrode, and a common electrode. The liquid crystal composition layer is composed of a liquid crystal composition including one or more compounds represented by General Formula (LC1).
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: September 13, 2016
    Assignee: DIC CORPORATION
    Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Seiji Funakura, Isao Oshiumi, Katsunori Shimada
  • Patent number: 9410084
    Abstract: The present invention provides a liquid crystal display device that prevents a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in the liquid crystal layer, and resolves the problems of display defects, such as white streaks, variations in alignment, and image sticking. Since a liquid crystal display device according to the present invention has a feature of preventing a decrease in the voltage holding ratio (VHR) and an increase in the ion density (ID) in the liquid crystal layer, and suppressing the occurrence of display defects such as image sticking, the liquid crystal display device is particularly useful for active matrix driving liquid crystal display devices with an IPS mode or an FFS mode and can be applied to liquid crystal display devices such as liquid crystal televisions, monitors, cellular phones, and smart phones.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: August 9, 2016
    Assignee: DIC CORPORATION
    Inventors: Takeshi Kuriyama, Jouji Kawamura, Seiji Funakura, Katsunori Shimada
  • Publication number: 20160215217
    Abstract: The present invention relates to a liquid crystal display device that includes a particular color filter containing a material containing chiral liquid crystals and a particular dye and/or pigment. The present invention provides a liquid crystal display device that can prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and solve the problem of display defects, such as white spots, variations in alignment, and burn-in. Because liquid crystal display devices according to the present invention characteristically prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and reduces the occurrence of display defects, such as burn-in, the liquid crystal display devices are particularly useful as liquid crystal display devices in IPS mode and FFS mode for active-matrix driving and can be applied to household electrical appliances, automobiles, production facilities, measuring and analytical instruments, and communication devices.
    Type: Application
    Filed: June 3, 2014
    Publication date: July 28, 2016
    Applicant: DIC CORPORATION
    Inventors: Hidenari Akiyama, Isa Nishiyama, Seiji Fanakura, Katsunori Shimada
  • Publication number: 20160152893
    Abstract: The present invention provides a liquid crystal display device which prevents a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) therein and which overcomes problems of defective display such as dropouts, uneven alignment, and screen burn-in. The liquid crystal display device of the present invention prevents a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) therein and reduces defective display such as screen burn-in; hence, such a liquid crystal display device is properly used as liquid crystal display devices of a VA mode and PSVA mode which involve active matrix driving and can be applied to liquid crystal display devices of liquid crystal TV sets, monitors, mobile phones, and smartphones.
    Type: Application
    Filed: May 23, 2013
    Publication date: June 2, 2016
    Applicant: DIC CORPORATION
    Inventors: Shinji Ogawa, Yoshinori Iwashita, Seiji Funakura, Isao Oshiumi, Katsunori Shimada
  • Publication number: 20160130502
    Abstract: The present invention relates to a liquid crystal display device that includes a particular color filter containing a material containing chiral liquid crystals and a particular pigment. The present invention provides a liquid crystal display device that can prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and solve the problem of display defects, such as white spots, variations in alignment, and burn-in. Because liquid crystal display devices according to the present invention characteristically prevent a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and reduces the occurrence of display defects, such as burn-in, the liquid crystal display devices are particularly useful as liquid crystal display devices in IPS mode and FFS mode for active-matrix driving and can be applied to household electrical appliances, automobiles, production facilities, measuring and analytical instruments, and communication devices.
    Type: Application
    Filed: June 6, 2014
    Publication date: May 12, 2016
    Applicant: DIC Corporation
    Inventors: Kazuaki Hatsusaka, Hidenari Akiyama, Akira Kimura, Seiji Funakura, Katsunori Shimada