Patents by Inventor Tomoya Kawashima

Tomoya Kawashima 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: 7643109
    Abstract: There are provided a substrate which has solved an unsatisfactory adhesion problem of a seal part in a liquid crystal cell comprising a retardation layer provided on the inner side of the cell, and a liquid crystal cell using the substrate. A color filter substrate includes a substrate 11, and at least a black matrix layer 12, a color filter layer 13, and a retardation layer 14 stacked on the substrate 11. The black matrix layer 12 and the color filter layer 13 are stacked on the substrate it while providing a margin around the periphery of the substrate 11. The retardation layer 14 is stacked on the black matrix layer 12 and the color filter layer 13 in a larger area than the area where the black matrix layer 12 and the color filter layer 13 are stacked. The substrate 11 in its margin, where neither the black matrix layer 12 nor the color filter layer 13 is stacked, is a predetermined seal area.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: January 5, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Tomoya Kawashima, Norihisa Moriya
  • Patent number: 7575786
    Abstract: A process for producing an optical element having a patterned quarter-wave retardation for use in a semitransmission reflection liquid crystal display device is provided. The process includes the steps of coating a coating liquid including a polymerizable liquid crystal onto a base material to form a coating film, aligning the polymerizable liquid crystal to a liquid crystal phase state, applying an ionizing radiation to the coating film through a photomask to polymerize the polymerizable liquid crystal in the liquid crystal phase state, whereby the polymerizable liquid crystal only in its exposed part is cured to form the liquid crystal layer, and heating the resultant substrate with the coating film formed thereon to bring the polymerizable liquid crystal in the uncured state to an isotropic phase state and, in this state, to polymerize the uncured polymerizable liquid crystal to form an isotropic layer.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: August 18, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Shinji Hayashi, Tomoya Kawashima, Norihisa Moriya
  • Publication number: 20060222783
    Abstract: There is provided a process for producing an optical element having a patterned quarter-wave retardation for use in a semitransmission reflection liquid crystal display device in a simple and cost-effective manner. The process comprises the steps of: coating a coating liquid comprising a polymerizable liquid crystal onto a base material to form a coating film; aligning the polymerizable liquid crystal to a liquid crystal phase state; applying an ionizing radiation to the coating film through a photomask to polymerize the polymerizable liquid crystal in the liquid crystal phase state, whereby the polymerizable liquid crystal only in its exposed part is cured to form the liquid crystal layer; and heating the resultant substrate with the coating film formed thereon to bring the polymerizable liquid crystal in the uncured state to an isotropic phase state and, in this state, to polymerize the uncured polymerizable liquid crystal to form an isotropic layer.
    Type: Application
    Filed: March 28, 2006
    Publication date: October 5, 2006
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Shinji Hayashi, Tomoya Kawashima, Norihisa Moriya
  • Publication number: 20060209233
    Abstract: There are provided a substrate which has solved an unsatisfactory adhesion problem of a seal part in a liquid crystal cell comprising a retardation layer provided on the inner side of the cell, and a liquid crystal cell using the substrate. A black matrix layer 12 formed of a resin composition containing a black colorant and its picture frame part 12A, a color filter layer 13, and a retardation layer 14 are stacked on a substrate 11, and an area including at least the picture frame part 12A is an area to be sealed.
    Type: Application
    Filed: March 10, 2006
    Publication date: September 21, 2006
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Tomoya Kawashima, Norihisa Moriya
  • Publication number: 20060181659
    Abstract: There are provided a substrate which has solved an unsatisfactory adhesion problem of a seal part in a liquid crystal cell comprising a retardation layer provided on the inner side of the cell, and a liquid crystal cell using the substrate. A black matrix layer 12 formed of a metal and its picture frame part 12A, a color filter layer 13, and a retardation layer 14 are stacked on a substrate 11, and an area including at least the picture frame part 12A is an area to be sealed.
    Type: Application
    Filed: February 16, 2006
    Publication date: August 17, 2006
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Tomoya Kawashima, Norihisa Moriya
  • Publication number: 20060181660
    Abstract: There are provided a substrate which has solved an unsatisfactory adhesion problem of a seal part in a liquid crystal cell comprising a retardation layer provided on the inner side of the cell, and a liquid crystal cell using the substrate. A color filter substrate includes a substrate 11, and at least a black matrix layer 12, a color filter layer 13, and a retardation layer 14 stacked on the substrate 11. The black matrix layer 12 and the color filter layer 13 are stacked on the substrate it while providing a margin around the periphery of the substrate 11. The retardation layer 14 is stacked on the black matrix layer 12 and the color filter layer 13 in a larger area than the area where the black matrix layer 12 and the color filter layer 13 are stacked. The substrate 11 in its margin, where neither the black matrix layer 12 nor the color filter layer 13 is stacked, is a predetermined seal area.
    Type: Application
    Filed: February 16, 2006
    Publication date: August 17, 2006
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Tomoya Kawashima, Norihisa Moriya