Patents by Inventor Seiji Funakura

Seiji Funakura 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: 9120968
    Abstract: 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: Grant
    Filed: July 18, 2013
    Date of Patent: September 1, 2015
    Assignee: DIC CORPORATION
    Inventors: Masakazu Kaneoya, Kiyofumi Kateuchi, Seiji Funakura, Katsunori Shimada
  • Publication number: 20150232757
    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: Application
    Filed: August 22, 2013
    Publication date: August 20, 2015
    Applicant: DIC CORPORATION
    Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Seiji Funakura, Isao Oshiumi, Katsunori Shimada
  • Publication number: 20150232758
    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: Application
    Filed: June 18, 2013
    Publication date: August 20, 2015
    Applicant: DIC CORPORATION
    Inventors: Takeshi Kuriyama, Jouji Kawamura, Seiji Funakura, Katsunori Shimada
  • Publication number: 20150124205
    Abstract: 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: Application
    Filed: July 18, 2013
    Publication date: May 7, 2015
    Inventors: Masakazu Kaneoya, Kiyofumi Kateuchi, Seiji Funakura, Katsunori Shimada
  • Publication number: 20150042930
    Abstract: 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) in a liquid crystal layer and resolves the problems of display defects such as white streaks, alignment nonuniformity, and image sticking. 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) in the liquid crystal layer and resolves the problems of display defects such as image sticking, the liquid crystal display device is useful as VA-mode and PSVA-mode liquid crystal display devices of an active matrix drive type, and is applicable to liquid crystal display devices of liquid crystal televisions, monitors, cellular phones, smart phones, etc.
    Type: Application
    Filed: October 3, 2012
    Publication date: February 12, 2015
    Applicant: DIC CORPORATION
    Inventors: Shinji Ogawa, Yoshinori Iwashita, Akira Kimura, Seiji Funakura, Katsunori Shimada
  • Patent number: 8885124
    Abstract: 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: Grant
    Filed: December 14, 2012
    Date of Patent: November 11, 2014
    Assignee: DIC Corporation
    Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Seiji Funakura, Katsunori Shimada
  • Patent number: 8860912
    Abstract: 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: Grant
    Filed: January 29, 2013
    Date of Patent: October 14, 2014
    Assignee: DIC Corporation
    Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Akira Kimura, Seiji Funakura, Katsunori Shimada
  • Publication number: 20140211138
    Abstract: 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: Application
    Filed: January 29, 2013
    Publication date: July 31, 2014
    Applicant: DIC CORPORATION
    Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Akira Kimura, Seiji Funakura, Katsunori Shimada
  • Publication number: 20140211139
    Abstract: The present invention relates to a liquid crystal display device that includes 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) in a liquid crystal layer and resolves the problems of display defects such as white streaks, alignment nonuniformity, and image sticking. 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) in the liquid crystal layer and resolves the problems of display defects such as image sticking, the liquid crystal display device is useful as VA-mode and PSVA-mode liquid crystal display devices of an active matrix drive type, and is applicable to liquid crystal display devices of liquid crystal televisions, monitors, cellular phones, smart phones, etc.
    Type: Application
    Filed: March 31, 2014
    Publication date: July 31, 2014
    Applicant: DIC CORPORATION
    Inventors: Shinji Ogawa, Yoshinori Iwashita, Akira Kimura, Seiji Funakura, Katsunori Shimada
  • Publication number: 20140211137
    Abstract: 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: Application
    Filed: December 14, 2012
    Publication date: July 31, 2014
    Applicant: DIC CORPORATION
    Inventors: Masakazu Kaneoya, Kiyofumi Takeuchi, Seiji Funakura, Katsunori Shimada
  • Patent number: 8268200
    Abstract: Provided is a pigment dispersing composition for a color filter including a color material, a resin, and an organic solvent which may dissolve the resin, wherein a modified pigment (D) is contained as the color material which includes, on the surface of a pigment (A), a polymer (P) obtained by polymerizing a polymer (B) containing a polymerizable unsaturated group soluble in a non-aqueous solvent and at least one type of polymerizable unsaturated monomer (C) which is soluble in the non-aqueous solvent and becomes either insoluble or poorly soluble following polymerization, alternatively wherein a modified pigment (D) is contained as the color material which is obtained, under the presence of a pigment (A), a non-aqueous solvent, and a polymer (B) containing a polymerizable unsaturated group soluble in the non-aqueous solvent, by polymerizing at least one type of polymerizable unsaturated monomer (C).
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: September 18, 2012
    Assignee: DIC Corporation
    Inventors: Hiroshi Kinoshita, Seiji Funakura, Eiichi Kiuchi, Yoshinori Katayama
  • Patent number: 8068297
    Abstract: The present invention relates to a pigment composition or pigment dispersion that is ideal for producing the blue pixel portion of a color filter for a liquid crystal display device, and a color filter. The invention has an object of providing a color filter having a blue pixel portion that yields a liquid crystal display device having a high degree of contrast that enables the display screen to be viewed with improved clarity, and a high level of brightness that produces a brighter display screen, as well as providing a pigment composition or dispersion that can be used to produce the color filter. The above object can be realized by using a dioxazine derivative that is substituted with a sulfamoyl group having a specific polyalkylene oxide group, and a pigment composition or dispersion for a color filter that includes this dioxazine derivative and a blue organic pigment or violet organic pigment.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: November 29, 2011
    Assignee: DIC Corporation
    Inventors: Arata Kudou, Seiji Funakura, Hitoshi Kondou
  • Publication number: 20100308284
    Abstract: Provided is a pigment dispersing composition for a color filter including a color material, a resin, and an organic solvent which may dissolve the resin, wherein a modified pigment (D) is contained as the color material which includes, on the surface of a pigment (A), a polymer (P) obtained by polymerizing a polymer (B) containing a polymerizable unsaturated group soluble in a non-aqueous solvent and at least one type of polymerizable unsaturated monomer (C) which is soluble in the non-aqueous solvent and becomes either insoluble or poorly soluble following polymerization.
    Type: Application
    Filed: March 23, 2009
    Publication date: December 9, 2010
    Applicant: DIC Corporation
    Inventors: Hiroshi Kinoshita, Seiji Funakura, Eiichi Kiuchi, Yoshinori Katayama
  • Publication number: 20100128375
    Abstract: The present invention relates to a pigment composition or pigment dispersion that is ideal for producing the blue pixel portion of a color filter for a liquid crystal display device, and a color filter. The invention has an object of providing a color filter having a blue pixel portion that yields a liquid crystal display device having a high degree of contrast that enables the display screen to be viewed with improved clarity, and a high level of brightness that produces a brighter display screen, as well as providing a pigment composition or dispersion that can be used to produce the color filter. The above object can be realized by using a dioxazine derivative that is substituted with a sulfamoyl group having a specific polyalkylene oxide group, and a pigment composition or dispersion for a color filter that includes this dioxazine derivative and a blue organic pigment or violet organic pigment.
    Type: Application
    Filed: July 14, 2008
    Publication date: May 27, 2010
    Applicant: DIC Corporation
    Inventors: Arata Kudou, Seiji Funakura, Hitoshi Kondou
  • Publication number: 20100044652
    Abstract: The present invention relates to a pigment composition or pigment dispersion suitable for producing a blue pixel portion of a color filter used in a liquid crystal display device, and also relates to a color filter. An object of the present invention is to obtain a color filter having a blue pixel portion capable of achieving a liquid crystal display device, which has a high contrast for making the images on the display screen even sharper and has a high brightness for making the display screen even brighter, and to provide a pigment composition or pigment dispersion for obtaining the color filter. The object can be achieved by the pigment composition or pigment dispersion for color filters characterized by containing a copper phthalocyanine sulfamoyl compound substituted with a sulfamoyl group having a specific polyalkylene oxide group, and a blue organic pigment.
    Type: Application
    Filed: March 4, 2008
    Publication date: February 25, 2010
    Applicant: DIC CORPORATION
    Inventors: Yukihiko Kawaharada, Motokazu Ishimori, Seiji Funakura
  • Patent number: 7429441
    Abstract: The present invention provides an electrostatic charge developing toner which uses a ?-type copper phthalocyanine pigment that has a BET specific surface area of 90 m2/g or greater as determined by the nitrogen adsorption method.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: September 30, 2008
    Assignee: Sun Chemical Corporation
    Inventors: Kevin A. Arthur, George H. Robertson, Seiji Funakura
  • Patent number: 6826001
    Abstract: The present invention provides a color filter which is more durable than a dye-type color filter and also has green pixel portions which exhibit a bright green color having a strong yellowish tinge when used in a liquid crystal display device using a three-band lamp having a main emission line of green light of about 545 nm as a light source, thus enabling the liquid crystal display device to display bright images even when using a backlighting light source having a low intensity. This color filter comprises green pixel portions which (1) contain a halogenated metal phthalocyanine dye wherein 8 to 16 halogen atoms are bonded to benzene rings in one phthalocyanine molecule, and (2) exhibit maximum transmittance at a wavelength within a range from 520 nm to 590 nm with respect to the transmission spectra of the entire range of visible light.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: November 30, 2004
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Seiji Funakura, Iemasa Yao, Arata Kudou, Eiichi Kiuchi, Hiroshi Katsube
  • Publication number: 20040185362
    Abstract: The present invention provides an electrostatic charge developing toner which uses a &bgr;-type copper phthalocyanine pigment that has a BET specific surface area of 90 m2/g or greater as determined by the nitrogen adsorption method.
    Type: Application
    Filed: May 17, 2004
    Publication date: September 23, 2004
    Inventors: Kevin A. Arthur, George H. Robertson, Seiji Funakura
  • Publication number: 20030151708
    Abstract: The present invention provides a color filter which is more durable than a dye-type color filter and also has green pixel portions which exhibit a bright green color having a strong yellowish tinge when used in a liquid crystal display device using a three-band lamp having a main emission line of green light of about 545 nm as a light source, thus enabling the liquid crystal display device to display bright images even when using a backlighting light source having a low intensity. This color filter comprises green pixel portions which (1) contain a halogenated metal phthalocyanine dye wherein 8 to 16 halogen atoms are bonded to benzene rings in one phthalocyanine molecule, and (2) exhibit maximum transmittance at a wavelength within a range from 520 nm to 590 nm with respect to the transmission spectra of the entire range of visible light.
    Type: Application
    Filed: October 18, 2002
    Publication date: August 14, 2003
    Inventors: Seiji Funakura, Iemasa Yao, Arata Kudou, Eiichi Kiuchi, Hiroshi Katsube
  • Patent number: 6596453
    Abstract: The invention relates to a process for producing a polymerized toner, including the step of polymerizing a polymerizable monomer composition containing at least a polymerizable monomer and a colorant in an aqueous medium. After polymerization, an aqueous dispersion containing polymer particles formed is subjected to stripping under reduced pressure in an evaporator after polymerization. At this time, the aqueous dispersion within the evaporator is continuously taken out of the evaporator and heated in an external heat exchanger, and the heated aqueous dispersion is returned to a liquid phase within the evaporator and subjected to stripping under reduced pressure within the evaporator while circulating the aqueous dispersion, thereby distilling off volatile organic compounds. By the production process, a polymerized toner markedly reduced in the content of a residual polymerizable monomer and having excellent properties is provided.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: July 22, 2003
    Assignee: Zeon Corporation
    Inventors: Takeo Fujino, Kazuhiro Sato, Seiji Funakura