Patents by Inventor Mika Yamamoto

Mika Yamamoto 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).

  • Publication number: 20170190819
    Abstract: It is an object of the present invention to provide a polymerizable liquid crystal composition that has an excellent storage stability and that enables a film formed by application of the composition to a base material and the subsequent exposure to heat or active energy rays to have a good adhesion to the base material. It is another object of the present invention to provide an optically anisotropic body that is produced using such a polymerizable composition and that has a good orientation. In particular, the present invention provides a polymerizable liquid crystal composition containing a polymerizable adhesion enhancer and a polymerizable liquid crystal compound. In addition, the present invention also provides an optically anisotropic body containing such a polymerizable liquid crystal composition.
    Type: Application
    Filed: June 16, 2015
    Publication date: July 6, 2017
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Yasuhiro Kuwana, Hidetoshi Nakata, Mika Yamamoto, Kazuaki Hatsusaka, Isa Nishiyama
  • Publication number: 20170190972
    Abstract: The present invention provides a liquid crystal display device that is free from a reduction in the voltage holding ratio (VHR) of the liquid crystal layer and an increase in ion density (ID) and that enables problems of defective display, such as white spots, uneven alignment, and image-sticking, to be eliminated. In particular, the present invention provides a liquid crystal display device in which a liquid crystal composition containing a liquid crystal compound having a specific structure is used in the liquid crystal layer and in which an optically anisotropic body formed through polymerization of a polymerizable liquid crystal composition containing a specific amount of a polymerizable liquid crystal compound having a specific structure is used as an in-cell retardation layer.
    Type: Application
    Filed: July 14, 2015
    Publication date: July 6, 2017
    Inventors: Takeshi Kuriyama, Jouji Kawamura, Mika Yamamoto, Yasuhiro Kuwana
  • Patent number: 9676959
    Abstract: A polymerizable composition solution that has good storage stability and allows a polymerizable compound in the polymerizable composition to be aligned well with no defects after application to a base and removal of a solvent by a drying process and also an optically anisotropic body that includes the solution and has good alignment without any defects. A solution containing a polymerizable composition and an organic solvent, wherein the polymerizable composition contains 90 mass % or more of a polymerizable compound intramolecularly having a 2-methyl-1,4-phenylene group as represented by general formula (1) and an optically anisotropic body including the solution.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: June 13, 2017
    Assignee: DIC CORPORATION
    Inventors: Yasuhiro Kuwana, Hidetoshi Nakata, Koichi Endou, Mika Yamamoto, Kunihiko Kotani, Hiroshi Hasebe, Yoshiyuki Ono
  • Publication number: 20170158793
    Abstract: There is provided a polymerizable liquid crystal composition that enables a film formed through application of the composition and exposure thereof to heat or active energy rays to have an excellent molecular alignment and reduced haze. There is also provided an optically anisotropic body that is produced by using such a polymerizable liquid crystal composition and that has a good transparency. In particular, the present invention provides a polymerizable liquid crystal composition containing a polymerizable haze-reducing agent and a polymerizable liquid crystal compound. Furthermore, the present invention also provides an optically anisotropic body produced by using the polymerizable liquid crystal composition of the present invention.
    Type: Application
    Filed: June 16, 2015
    Publication date: June 8, 2017
    Applicant: DIC CORPORATION
    Inventors: Kouichi Endo, Mika Yamamoto, Kazuaki Hatsusaka
  • Publication number: 20170073581
    Abstract: The present invention provides a mixture including a compound that has a mesogenic group and satisfying an expression represented by Expression (1): 1.0?YI/?n?50.0??Expression (1) wherein YI represents a yellowness index of the mixture and ?n represents a refractive index anisotropy of the compound having a mesogenic group. In a case of producing an optical anisotropic body constituted by a composition prepared by using the compound, repellence hardly occurs, and the mixture exhibits excellent alignment properties in a case of using the optical anisotropic body. Furthermore, a composition that contains the mixture and an optical anisotropic body that uses the composition are provided.
    Type: Application
    Filed: February 24, 2015
    Publication date: March 16, 2017
    Inventors: Masahiro Horiguchi, Mika Yamamoto, Yasuhiro Kuwana
  • Publication number: 20170066967
    Abstract: The invention provides a polymerizable composition including a compound that has a mesogenic group and satisfying an expression represented by Expression (1): 1.0?YI/?n?50.0, wherein YI represents a yellowness index of a material including only a compound having a mesogenic group in the polymerizable composition, and ?n represents a refractive index anisotropy of a material including only a compound having a mesogenic group in the polymerizable composition, with the proviso that a chiral compound having a mesogenic group is excluded in the material including only the compound having the mesogenic group. The polymerizable composition has high storage stability and is unlikely to cause an increase of the content of a polymer component when being added to a polymerizable liquid crystal composition, and is excellent in adhesiveness, is not unlikely to cause discoloration, and exhibits good coating properties and good alignment properties in preparing an optical anisotropic body.
    Type: Application
    Filed: February 24, 2015
    Publication date: March 9, 2017
    Applicant: DIC Corporation
    Inventors: Mika Yamamoto, Masahiro Horiguchi, Yasuhiro Kuwana
  • Publication number: 20170003418
    Abstract: There is provided a compound containing a mesogenic group, which includes a silicon compound at a low concentration, a polymerizable compound containing the mesogenic group, a mixture and a composition using these compounds, a polymerizable mixture having the polymerizable compound, and a polymer, an optically anisotropic body, and a phase difference film using the polymerizable composition. It is possible to obtain the optically anisotropic body and the phase difference film having satisfactory scratch resistance and adhesion, by using the polymerizable composition composed of the compound containing a mesogenic group, which includes a silicon compound at a low concentration.
    Type: Application
    Filed: December 18, 2014
    Publication date: January 5, 2017
    Applicant: DIC Corporation
    Inventors: Mika Yamamoto, Yasuhiro Kuwana, Hidetoshi Nakata, Koichi Endou, Kunihiko Kotani, Hiroshi Hasebe, Yoshiyuki Ono
  • Publication number: 20160370626
    Abstract: The present invention provides a liquid crystal display device which can prevent a decrease in a voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) and solve a problem of a display defect such as white spots, alignment irregularities, burn-in, or the like. The present-invention provides a liquid crystal display device which uses a liquid crystal composition containing a liquid crystal compound having a specific structure as a liquid crystal layer, and an optically anisotropic body obtained by polymerizing a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound having a specific structure at a specific ratio as an in-cell type retardation film.
    Type: Application
    Filed: February 24, 2015
    Publication date: December 22, 2016
    Applicant: DIC CORPORATION
    Inventors: Shinji OGAWA, Yoshinori IWASHITA, Mika YAMAMOTO, Yasuhiro KUWANA, Koichi ENDOU, Kazuaki HATSUSAKA
  • Publication number: 20160272888
    Abstract: An object of the present invention is to provide a polymerizable liquid crystal composition with which two characteristics of smoothness of a surface of an anisotropic optical body and orientation properties of liquid crystals can be simultaneously improved, when preparing an anisotropic optical body to be obtained by photopolymerization of the polymerizable liquid crystal composition. Specifically, an object of the present invention is to provide a polymerizable liquid crystal composition containing specific polymerizable compounds and a fluorine-based surfactant. In addition, an anisotropic optical body, a retardation film, an antireflective film, and a liquid crystal display element prepared using the polymerizable liquid crystal composition of the present invention are also provided.
    Type: Application
    Filed: October 7, 2014
    Publication date: September 22, 2016
    Applicant: DIC CORPORATION (TOKYO)
    Inventors: Koichi Endou, Yasuhiro Kuwana, Hidetoshi Nakata, Mika Yamamoto, Kazuaki Hatsusaka
  • Publication number: 20160237351
    Abstract: The present invention provides a method for producing a polymerizable liquid crystal composition which produces films being uncolored and having no cissinq and good alignment when applied to a substrate, and also provides a polymerizable liquid crystal composition produced by the method and an optically anisotropic body using the polymerizable liquid crystal composition. Specifically, the present invention provides a method for producing a polymerizable liquid crystal composition, the method comprising a step (I) of preparing a polymerizable solution by mixing at least, one polymerizable compound having at least one polymerizable functional group and one or two or more organic solvents and heating and stirring the resultant mixture; and a step (II) of mixing the polymerizable solution with a polymerization initiator, and also provides a polymerizable liquid crystal composition produced by the method and an optically anisotropic body using the polymerizable liquid crystal composition.
    Type: Application
    Filed: October 7, 2014
    Publication date: August 18, 2016
    Applicant: DIC CORPORATION
    Inventors: Koichi Endou, Yasuhiro Kuwana, Hidetoshi Nakata, Mika Yamamoto, Kunihiko Kotani, Hiroshi Hasebe, Yoshiyuki Ono
  • Publication number: 20160115338
    Abstract: The present invention provides a polymerizable composition solution that has good storage stability and allows a polymerizable compound in the polymerizable composition to be aligned well with no defects after application to a base and removal of a solvent by a drying process and also provides an optically anisotropic body that includes the solution and has good alignment without any defects. The present invention provides a solution containing a polymerizable composition and an organic solvent, wherein the polymerizable composition contains 90 mass % or more of a polymerizable compound intramolecularly having a 2-methyl-1,4-phenylene group as represented by general formula (1) and provides an optically anisotropic body including the solution.
    Type: Application
    Filed: May 23, 2014
    Publication date: April 28, 2016
    Applicant: DIC Corporation
    Inventors: Yasuhiro Kuwana, Hidetoshi Nakata, Koichi Endou, Mika Yamamoto, Kunihiko Kotani, Hiroshi Hasebe, Yoshiyuki Ono
  • Patent number: 7054025
    Abstract: An information processing apparatus connectable with an external printer, includes communicating unit for communication with the external printer; notifying unit for notifying the external printer of pre-print notification through the communicating unit when execution of printing is instructed; generating unit for processing, after the notifying unit executes the notification, data to be printed to generate print data; sending unit for the sending the print data generated by the generating unit to the external printer through the communicating unit.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: May 30, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventor: Mika Yamamoto
  • Publication number: 20040184081
    Abstract: An information processing apparatus connectable with an external printer, includes communicating means for communication with the external printer; notifying means for notifying the external printer of pre-print notification through the communicating means when execution of printing is instructed; generating means for processing, after the notifying means executes the notification, data to be printed to generate print data; sending means for the sending the print data generated by the generating means to the external printer through the communicating means.
    Type: Application
    Filed: January 29, 2004
    Publication date: September 23, 2004
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Mika Yamamoto
  • Patent number: 5536293
    Abstract: A base metal composition for forming an external electrode of a multilayer electronic component contains 70 to 85 percent by weight of Cu, 2 to 10 percent by weight of glass frit and 10 to 28 percent by weight of an organic vehicle. The glass frit contains at least one of lead zinc borosilicate and zinc borosilicate, Ba-Si based glass, and Zn which is in a range of less than 10 percent by weight in terms of ZnO.
    Type: Grant
    Filed: October 5, 1994
    Date of Patent: July 16, 1996
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Mika Yamamoto, Masaki Fujiyama, Yukio Sanada, Kunihiko Hamada
  • Patent number: 5512484
    Abstract: There are disclosed a protein corresponding to a molecular weight of approximately 16 kD, which can be specifically expressed in carrot roots, a gene coding for the protein, and a plasmid containing the gene.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: April 30, 1996
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Mika Yamamoto, Kenji Oheda
  • Patent number: D654740
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: February 28, 2012
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Jason W. Cheng, Jay F. Perkins, Ryan R. Berger, Mika Yamamoto