Patents by Inventor Mitsuhisa Hatashima

Mitsuhisa Hatashima 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 with perpendicular optical retardation and liquid crystal display device
    Patent number: 7965353
    Abstract: A color filter comprising a substrate, a red pixel, green pixel and blue pixel, each being disposed on the substrate, wherein a perpendicular optical retardation RRth of the red pixel, a perpendicular optical retardation GRth of the green pixel, and a perpendicular optical retardation BRth of the blue pixel satisfy the following formulas (1) and (2): |(RRth?BRth)|?|(GRth?BRth)|?0??(1) |(RRth?BRth)|?|(RRth?GRth)|?0??(2) wherein RRth, GRth and BRth represent, respectively, a product of a thickness [nm] of a pixel and a value obtained by subtracting a value of thickness-wise refractive index from an average value of an in-plane refractive index of each of these pixels.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: June 21, 2011
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Sosuke Akao, Koichi Minato, Satoshi Ohkuma, Yoshinori Nagasaki, Takeshi Itoi, Mitsuhisa Hatashima
  • Color filter and liquid crystal display device
    Publication number: 20080143935
    Abstract: A color filter comprising a substrate, a red pixel, green pixel and blue pixel, each being disposed on the substrate, wherein a perpendicular optical retardation RRth of the red pixel, a perpendicular optical retardation GRth of the green pixel, and a perpendicular optical retardation BRth of the blue pixel satisfy the following formulas (1) and (2): |(RRth?BRth)|?|(GRth?BRth)|?0 ??(1) |(RRth?BRth)|?|(RRth?GRth)|?0 ??(2) wherein RRth, GRth and BRth represent, respectively, a product of a thickness [nm] of a pixel and a value obtained by subtracting a value of thickness-wise refractive index from an average value of an in-plane refractive index of each of these pixels.
    Type: Application
    Filed: December 19, 2007
    Publication date: June 19, 2008
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Sosuke Akao, Koichi Minato, Satoshi Ohkuma, Yoshinori Nagasaki, Takeshi Itoi, Mitsuhisa Hatashima