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).
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Patent number: 7642469Abstract: 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: GrantFiled: August 8, 2003Date of Patent: January 5, 2010Assignee: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
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Patent number: 7449768Abstract: 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: GrantFiled: December 29, 2004Date of Patent: November 11, 2008Assignee: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Eiji Ohishi, Yashuhiko Ishii
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Patent number: 7371450Abstract: 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: GrantFiled: August 6, 2003Date of Patent: May 13, 2008Assignee: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
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Patent number: 7304250Abstract: 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: GrantFiled: August 6, 2003Date of Patent: December 4, 2007Assignee: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
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Patent number: 7285843Abstract: 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: GrantFiled: December 23, 2002Date of Patent: October 23, 2007Assignee: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Eiji Ohishi, Yasuhiko Ishii
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Publication number: 20070042654Abstract: 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: ApplicationFiled: October 30, 2006Publication date: February 22, 2007Applicant: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Eiji Ohishi, Yasuhiko Ishii
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Publication number: 20060088690Abstract: 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: ApplicationFiled: August 6, 2003Publication date: April 27, 2006Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
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Publication number: 20050244608Abstract: 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: ApplicationFiled: August 8, 2003Publication date: November 3, 2005Applicant: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
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Publication number: 20050244609Abstract: 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: ApplicationFiled: August 6, 2003Publication date: November 3, 2005Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Yukihiro Kyoden, Eiji Ohishi
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Publication number: 20050121213Abstract: 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: ApplicationFiled: December 29, 2004Publication date: June 9, 2005Applicant: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Eiji Ohishi, Yasuhiko Ishii
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Patent number: 6733869Abstract: 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: GrantFiled: February 21, 2003Date of Patent: May 11, 2004Assignee: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Eiji Ohishi, Yukihiro Kyoden
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Publication number: 20030164243Abstract: 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: ApplicationFiled: February 21, 2003Publication date: September 4, 2003Applicant: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Yasuhiko Ishii, Daisuke Hashimoto, Eiji Ohishi, Yukihiro Kyoden
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Publication number: 20030152787Abstract: 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: ApplicationFiled: December 11, 2002Publication date: August 14, 2003Inventors: Fumihiro Arakawa, Hiroshi Kojima, Eiji Ohishi
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Publication number: 20030142486Abstract: 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: ApplicationFiled: December 17, 2002Publication date: July 31, 2003Applicant: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Eiji Ohishi, Yasuhiko Ishii
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Publication number: 20030136572Abstract: 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: ApplicationFiled: December 23, 2002Publication date: July 24, 2003Applicant: Dai Nippon Printing Co., Ltd.Inventors: Fumihiro Arakawa, Eiji Ohishi, Yasuhiko Ishii