Patents by Inventor Shigeyuki Ogino

Shigeyuki Ogino 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).

  • Color filter for liquid crystal display device and method for producing the color filter
    Patent number: 5705302
    Abstract: A color filter for a liquid crystal display device comprises an optically transparent substrate, a transparent conductive layer formed on the substrate, and a color layer formed on the transparent conductive layer with red, green and blue pixels arranged in a predetermined pattern. The color layer comprises pigments for coloring purpose and transparent conductive particles having a hydrophobic surface. The transparent conductive particles are included from 5% to 50% by volume of the color layer. The color layer may preferably have a specific resistivity of from 10.sup.-1 .OMEGA..multidot.cm to 10.sup.8 .OMEGA..multidot.cm. The transparent conductive particles comprise base transparent conductive particles having a hydrophobic compound bound on their surface by coupling or graft polymerization.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: January 6, 1998
    Assignee: Seiko Epson Corporation
    Inventors: Yoshihiro Ohno, Hiroshi Kiguchi, Fumiaki Matsushima, Taeko Nakano, Kuniyasu Matsui, Tsuyoshi Sunagawa, Toshiki Nakajima, Satoru Miyashita, Shigeyuki Ogino
  • Color filter and method of preparation
    Patent number: 5554466
    Abstract: A color filter formed in accordance with the invention is formed by depositing a thin film of organic pigment an on electrode by electrochemical methods. An organic pigment is included in an aqueous micellar solution that includes a surfactant that has redox reactivity. The surfactant preferably has a metallocene such as ferrocene at the hydrophobic terminal end group. A transparent substrate having a transparent electrode thereon is emersed in the micellar solution. Voltage is applied to the transparent electrode and the organic pigment will form on the transparent electrode. Conductive particles, polymer material or conductive polymer material can be included with or on the pigment. Alternatively, the polymer or conductive polymer can be layered.
    Type: Grant
    Filed: March 17, 1995
    Date of Patent: September 10, 1996
    Assignee: Seiko Epson Corporation
    Inventors: Fumiaki Matsushima, Yoshihiro Ohno, Shigeyuki Ogino, Kuniyasu Matsui
  • Method of preparation of a color filter by electrolytic deposition of a polymer material on a previously deposited pigment
    Patent number: 5399450
    Abstract: A color filter formed in accordance with the invention is formed by depositing a thin film of organic pigment an on electrode by electrochemical methods. An organic pigment is included in an aqueous micellar solution that includes a surfactant that has redox reactivity. The surfactant preferably has a metallocene such as ferrocene at the hydrophobic terminal end group. A transparent substrate having a transparent electrode thereon is emersed in the micellar solution. Voltage is applied to the transparent electrode and the organic pigment will form on the transparent electrode. Conductive particles, polymer material or conductive polymer material can be included with or on the pigment. Alternatively, the polymer or conductive polymer can be layered.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: March 21, 1995
    Assignee: Seiko Epson Corporation
    Inventors: Fumiaki Matsushima, Yoshihiro Ohno, Shigeyuki Ogino, Kuniyasu Matsui