Patents by Inventor Yuichi Oyama

Yuichi Oyama 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: 20090134358
    Abstract: It is the object of the invention to provide a curable resin composition which causes no liquid crystal contamination, which are excellent in the adhesive property to a glass, and which causes no cell gap inequality in the case it is used as a sealant for a liquid crystal display element to produce a liquid crystal display element by a one drop fill process, a sealant for a liquid crystal display element, and a liquid crystal display element. The invention is a curable resin composition, which contains a curable resin to be cured by light and/or heat and a polymerization initiator, the curable resin being a crystalline (meth)acrylic acid-modified epoxy resin comprising a (meth)acrylic group and an epoxy group in one molecule.
    Type: Application
    Filed: November 19, 2008
    Publication date: May 28, 2009
    Applicant: Sekisui Chemical Co., LTD.
    Inventors: Mitsuru Tanikawa, Takashi Watanabe, Yuichi Oyama, Takuya Yamamoto, Sadamu Uwagawa
  • Publication number: 20090093562
    Abstract: It is the object of the invention to provide a curable resin composition which causes no liquid crystal contamination, which are excellent in the adhesive property to a glass, and which causes no cell gap inequality in the case it is used as a sealant for a liquid crystal display element to produce a liquid crystal display element by a one drop fill process, a sealant for a liquid crystal display element, and a liquid crystal display element. The invention is a curable resin composition, which contains a curable resin to be cured by light and/or heat and a polymerization initiator, the curable resin being a crystalline (meth)acrylic acid-modified epoxy resin comprising a (meth)acrylic group and an epoxy group in one molecule.
    Type: Application
    Filed: November 18, 2008
    Publication date: April 9, 2009
    Applicant: Sekisui Chemical Co., LTD.
    Inventors: Mitsuru TANIKAWA, Takashi WATANABE, Yuichi OYAMA, Takuya YAMAMOTO, Sadamu UWAGAWA
  • Publication number: 20090061117
    Abstract: It is an object of the present invention to provide a sealant for a One prop Fill process which hardly causes a peeling phenomenon between the sealant and a substrate in production of liquid crystal display device since the sealant has excellent adhesion to the substrate, and which is most suitable for producing a liquid crystal display device having low color irregularity in liquid crystal display since the sealant does not cause liquid crystal contamination, and relates to a sealant for a One prop Fill process, in which in production of liquid crystal display device by a One prop Fill process, even a portion where light may be not directly irradiated can be adequately cured, a liquid crystal is not deteriorated by ultraviolet light to be irradiated in curing the sealant, and high display quality and high reliability of the liquid crystal display device can be realized, a vertically conducting material, and a liquid crystal display device obtained by using these.
    Type: Application
    Filed: May 8, 2006
    Publication date: March 5, 2009
    Inventors: Yuichi Oyama, Hideyasu Nakajima, Takashi Watanabe, Takuya Yamamoto, Mitsuru Tanikawa
  • Patent number: 7253131
    Abstract: The invention provides a curing resin composition to be used for a sealant or an end-sealing material for a display element, which comprises a curing resin together with a photopolymerization initiator and/or a curing agent and, has a carbonyl group derived from a (meth)acryl group together with an epoxy group and/or a hydroxyl group derived from an epoxy group and, a cured product of which has nitrogen atoms at a ratio of 3 to 10% by atom in the total of carbon atoms, hydrogen atoms and nitrogen atoms in the composition; a volume resistance of 1×1013 ?·cm or higher; a dielectric constant of 3 or higher at 100 kHz; and a glass transition temperature of 80 to 150° C.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: August 7, 2007
    Assignees: Sekisui Chemical Co., Ltd., Sharp Kabushiki Kaisha
    Inventors: Takashi Watanabe, Yuichi Oyama, Takuya Yamamoto, Nobuo Sasaki, Tazoh Ikeguchi, Makoto Nakahara
  • Publication number: 20070021524
    Abstract: It is an object of the invention to provide a curing resin composition that scarcely causes pollution of a liquid crystal owing to elution of its components to the liquid crystal material and therefore, causes little unevenness of color in liquid crystal display in the case of using it as a sealant for a liquid crystal display element or an end-sealing material for a liquid crystal display element in fabrication of a liquid crystal display element and that is excellent in the storage stability and therefore, optimum for fabrication of a display apparatus especially by one drop fill process and to provide a sealant for a display element and an end-sealing material for a display element using the composition.
    Type: Application
    Filed: July 14, 2006
    Publication date: January 25, 2007
    Applicants: Sekisui Chemical Co., Ltd., Sharp Kabushiki Kaisha
    Inventors: Takashi Watanabe, Yuichi Oyama, Takuya Yamamoto, Nobuo Sasaki, Tazoh Ikeguchi, Makoto Nakahara
  • Publication number: 20060240198
    Abstract: It is the object of the invention to provide a curable resin composition which causes no liquid crystal contamination, which are excellent in the adhesive property to a glass, and which causes no cell gap inequality in the case it is used as a sealant for a liquid crystal display element to produce a liquid crystal display element by a one drop fill process, a sealant for a liquid crystal display element, and a liquid crystal display element. The invention is a curable resin composition, which contains a curable resin to be cured by light and/or heat and a polymerization initiator, the curable resin being a crystalline (meth)acrylic acid-modified epoxy resin comprising a (meth)acrylic group and an epoxy group in one molecule.
    Type: Application
    Filed: June 4, 2004
    Publication date: October 26, 2006
    Inventors: Mitsuru Tanikawa, Takashi Watanabe, Yuichi Oyama, Takuya Yamamoto, Sadamu Uwagawa
  • Publication number: 20040258921
    Abstract: It is an object of the invention to provide a curing resin composition that scarcely causes pollution of a liquid crystal owing to elution of its components to the liquid crystal material and therefore, causes little unevenness of color in liquid crystal display in the case of using it as a sealant for a liquid crystal display element or an end-sealing material for a liquid crystal display element in fabrication of a liquid crystal display element and that is excellent in the storage stability and therefore, optimum for fabrication of a display apparatus especially by one drop fill process and to provide a sealant for a display element and an end-sealing material for a display element using the composition.
    Type: Application
    Filed: June 14, 2004
    Publication date: December 23, 2004
    Inventors: Takashi Watanabe, Yuichi Oyama, Takuya Yamamoto, Nobuo Sasaki, Tazoh Ikeguchi, Makoto Nakahara