Patents by Inventor Eiji Ohishi

Eiji Ohishi 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: 7642469
    Abstract: An electromagnetic shielding sheet is capable of shielding electromagnetic radiation generated by a display, has a proper transparency and uniformly distributed meshes, prevents the occurrence of white and/or black spot defects and linear defects and glaring, and ensures the satisfactory visibility of images. The electromagnetic shielding sheet has a conductive structure (109) having lines (107) having straight parts of widths (W) in the range of C(1±30%), where C is a predetermined value. The radius (r) of curvature of a side surface (107S) extending between the upper side (107U) and the lower side (107B) of a bank in a section of the lines (107) in a plane perpendicular to the transparent sheet meet a condition expressed by: 1.5t?r?3.0t, where t is the thickness of the conductive structure (109).
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: January 5, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
  • Patent number: 7449768
    Abstract: There is provided an electromagnetic wave shielding sheet which can effectively prevent an adhesive layer from being colored at the time of etching. The electromagnetic wave shielding sheet comprises a laminate of at least a transparent substrate film, an adhesive layer, and an electromagnetic wave shielding layer. The electromagnetic wave shielding layer is formed of a mesh metal foil with densely arranged openings and being transparent. The adhesive layer is substantially colorless and transparent.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: November 11, 2008
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Eiji Ohishi, Yashuhiko Ishii
  • Patent number: 7371450
    Abstract: An electromagnetic shielding sheet of the present invention includes a transparent base sheet and a metal layer attached to one surface of the transparent base sheet. The metal layer has a mesh part, a peripheral mesh part surrounding the mesh part, and a grounding frame surrounding the peripheral mesh part. A width of lines forming meshes in the peripheral mesh part gradually increases from the mesh part toward the grounding frame. The lines of the electromagnetic shielding sheet are scarcely bent or broken in all processes including fabricating and assembling processes, and the electromagnetic shielding sheet is excellent in handling ease.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: May 13, 2008
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
  • Patent number: 7304250
    Abstract: An electromagnetic shielding sheet 1 includes: a transparent base 11, and at least an adhesive layer 13, an antirust layer 25A and a mesh metal layer 21 formed on one of the surfaces of the base. A blackened layer 23A is sandwiched between the mesh metal layer 21 and the antirust layer 25A. At least openings 105 of the mesh metal layer 21 are filled up with a resin such that the mesh metal layer 21 has a substantially flat surface.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: December 4, 2007
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
  • Patent number: 7285843
    Abstract: There is provided an electromagnetic wave shielding sheet which can effectively prevent an adhesive layer from being colored at the time of etching. The electromagnetic wave shielding sheet comprises a laminate of at least a transparent substrate film, an adhesive layer, and an electromagnetic wave shielding layer. The electromagnetic wave shielding layer is formed of a mesh metal foil with densely arranged openings and being transparent. The adhesive layer is substantially colorless and transparent.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: October 23, 2007
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Eiji Ohishi, Yasuhiko Ishii
  • Publication number: 20070042654
    Abstract: The present invention discloses a sheet for electromagnetic wave shielding, comprising a laminate of at least a transparent substrate film and an electromagnetic wave shielding layer. The electromagnetic wave shielding layer is formed of a meshy metal foil with densely arranged openings and being transparent. A protective film is stacked separably on the laminate either in its surface of transparent substrate film side or in its surface of electromagnetic wave shielding layer side.
    Type: Application
    Filed: October 30, 2006
    Publication date: February 22, 2007
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Eiji Ohishi, Yasuhiko Ishii
  • Publication number: 20060088690
    Abstract: An electromagnetic shielding sheet 1 includes: a transparent base 11, and at least an adhesive layer 13, an antirust layer 25A and a mesh metal layer 21 formed on one of the surfaces of the base. A blackened layer 23A is sandwiched between the mesh metal layer 21 and the antirust layer 25A. At least openings 105 of the mesh metal layer 21 are filled up with a resin such that the mesh metal layer 21 has a substantially flat surface.
    Type: Application
    Filed: August 6, 2003
    Publication date: April 27, 2006
    Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
  • Publication number: 20050244608
    Abstract: An electromagnetic shielding sheet is capable of shielding electromagnetic radiation generated by a display, has a proper transparency and uniformly distributed meshes, prevents the occurrence of white and/or black spot defects and linear defects and glaring, and ensures the satisfactory visibility of images. The electromagnetic shielding sheet has a conductive structure (109) having lines (107) having straight parts of widths (W) in the range of C(1±30%), where C is a predetermined value. The radius (r) of curvature of a side surface (107S) extending between the upper side (107U) and the lower side (107B) of a bank in a section of the lines (107) in a plane perpendicular to the transparent sheet meet a condition expressed by: 1.5t<r<3.0t, where t is the thickness of the conductive structure (109).
    Type: Application
    Filed: August 8, 2003
    Publication date: November 3, 2005
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
  • Publication number: 20050244609
    Abstract: An electromagnetic shielding sheet of the present invention includes a transparent base sheet and a metal layer attached to one surface of the transparent base sheet. The metal layer has a mesh part, a peripheral mesh part surrounding the mesh part, and a grounding frame surrounding the peripheral mesh part. A width of lines forming meshes in the peripheral mesh part gradually increases from the mesh part toward the grounding frame. The lines of the electromagnetic shielding sheet are scarcely bent or broken in all processes including fabricating and assembling processes, and the electromagnetic shielding sheet is excellent in handling ease.
    Type: Application
    Filed: August 6, 2003
    Publication date: November 3, 2005
    Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
  • Publication number: 20050121213
    Abstract: There is provided an electromagnetic wave shielding sheet which can effectively prevent an adhesive layer from being colored at the time of etching. The electromagnetic wave shielding sheet comprises a laminate of at least a transparent substrate film, an adhesive layer, and an electromagnetic wave shielding layer. The electromagnetic wave shielding layer is formed of a mesh metal foil with densely arranged openings and being transparent. The adhesive layer is substantially colorless and transparent.
    Type: Application
    Filed: December 29, 2004
    Publication date: June 9, 2005
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Eiji Ohishi, Yasuhiko Ishii
  • Patent number: 6733869
    Abstract: A metallic foil and a transparent substrate film are laminated with an adhesive layer. The roughness of the adhesive-layer-side surface (lower surface) of the metallic foil is such that the maximum height Rmax is more than 0 and less than 4 &mgr;m. As long as the maximum height Rmax falls in the range, the adhesive layer never contains air bubbles in such sizes that reflectance is adversely affected. The roughness of the surface (upper surface) of the metallic foil, opposite the adhesive-layer-side surface, is preferably such that the arithmetic mean roughness Ra is between 0.02 &mgr;m and 1 &mgr;m. As long as the arithmetic mean roughness Ra is in this range, it is possible to efficiently conduct vacuuming to bring, into close contact, a photosensitive resin layer and a photomask in sheet form placed on the photosensitive resin layer, before effecting the pattern-wise exposure of the photosensitive resin layer.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: May 11, 2004
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Eiji Ohishi, Yukihiro Kyoden
  • Publication number: 20030164243
    Abstract: A netlike metallic foil 11′ and a transparent substrate film 14 are laminated with an adhesive layer 13. The adhesive-layer 13-side surface of the metallic foil 11′ may be formed with a darkening layer 12. The roughness of the adhesive-layer 13-side surface (lower surface) of the metallic foil 11′ is preferably such that the maximum height Rmax be more than 0 and less than 4 &mgr;m, more preferably more than 0 and 2 &mgr;m or less. As long as the maximum height Rmax of this surface of the metallic foil 11′ falls in the above-described range, the adhesive layer never contains air bubbles in such sizes that reflectance is adversely affected. Further, the roughness of the surface (upper surface) of the metallic foil 11′, opposite to the adhesive-layer 13-side surface, is preferably such that the arithmetic mean roughness Ra is in the range between 0.02 &mgr;m and 1 &mgr;m.
    Type: Application
    Filed: February 21, 2003
    Publication date: September 4, 2003
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Eiji Ohishi, Yukihiro Kyoden
  • Publication number: 20030152787
    Abstract: There is provided an electromagnetic wave shielding member comprising: a transparent film substrate; and a mesh formed of a thin metal film stacked on the surface of the transparent film substrate through an adhesive and/or a pressure-sensitive adhesive, the adhesive and/or the pressure-sensitive adhesive comprising an absorber which can absorb specific wavelengths, i.e., the wavelengths of visible light and/or near-infrared.
    Type: Application
    Filed: December 11, 2002
    Publication date: August 14, 2003
    Inventors: Fumihiro Arakawa, Hiroshi Kojima, Eiji Ohishi
  • Publication number: 20030142486
    Abstract: The present invention discloses a sheet for electromagnetic wave shielding, comprising a laminate of at least a transparent substrate film and an electromagnetic wave shielding layer. The electromagnetic wave shielding layer is formed of a meshy metal foil with densely arranged openings and being transparent. A protective film is stacked separably on the laminate either in its surface of transparent substrate film side or in its surface of electromagnetic wave shielding layer side.
    Type: Application
    Filed: December 17, 2002
    Publication date: July 31, 2003
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Eiji Ohishi, Yasuhiko Ishii
  • Publication number: 20030136572
    Abstract: There is provided an electromagnetic wave shielding sheet which can effectively prevent an adhesive layer from being colored at the time of etching. The electromagnetic wave shielding sheet comprises a laminate of at least a transparent substrate film, an adhesive layer, and an electromagnetic wave shielding layer. The electromagnetic wave shielding layer is formed of a mesh metal foil with densely arranged openings and being transparent. The adhesive layer is substantially colorless and transparent.
    Type: Application
    Filed: December 23, 2002
    Publication date: July 24, 2003
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Eiji Ohishi, Yasuhiko Ishii