Patents by Inventor Fumihiro Arakawa

Fumihiro Arakawa 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: 7485814
    Abstract: An electromagnetic wave shielding filter 10 includes a meshed layer, wherein at least one of the front and back surfaces of the meshed layer is subjected to a blackening treatment to be a blackened face having micro-irregularities. The shape of the micro-irregularities is adjusted to have a probability density curve with a peak point being convex upward wherein the probability density curve is defined as a curve depicted in a graph in which the change of height from the peak value Rp to the bottom value Rv of the deepest valley is shown as the horizontal axis while the probability density expressing the distribution of height is shown as the vertical axis. Also, in the probability density curve, a horizontal tangent can be drawn at its peak point.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: February 3, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Tetsuya Ojiri, Fumihiro Arakawa, Yukihiro Kyoden
  • Patent number: 7472999
    Abstract: An antiglare film having excellent durability is disposed on the front of a display device and comprises a transparent plastic film and, formed on the transparent plastic film, at least an antiglare layer having fine concaves and convexes on its surface, wherein the antiglare layer is formed of a transparent resin and satisfies requirements that: (1) the surface of the antiglare layer has a three-dimensional ten-point mean roughness of 0.9 ?m to 3 ?m; and (2) the mean spacing between adjacent profile peaks on a three-dimensional roughness reference plane is 20 ?m to 50 ?m.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: January 6, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Taiji Suga, Tadahiro Masaki, Fumihiro Arakawa
  • Publication number: 20080277157
    Abstract: An electromagnetic wave shielding sheet 1 comprises a transparent substrate 11, and line parts 107 that define openings 105, provided on the transparent substrate 11. The line parts 107 have a metal mesh layer 21, and a blackening layer 25A formed on the surface of the metal layer 21, on the side of the transparent substrate 11. Matted layers 31 are formed on the side faces of the line parts 107, and an anticorrosive layer 23A is provided between the blackening layer 25A and the transparent substrate 11.
    Type: Application
    Filed: January 26, 2005
    Publication date: November 13, 2008
    Applicant: DAI NIPPON PRINTING CO., LTD
    Inventors: Nobuo Naito, Fumihiro Arakawa, Tadahiro Masaki
  • 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: 7445733
    Abstract: An object of the present invention is to eliminate drawbacks of conventional multi-layered antireflection films, that is, that a lot of time is required in the formation of a transparent conductive thin film and a low-refractive index layer leading to low processing speed, the corrosion resistance of the transparent conductive thin film is unsatisfactory, and the reflectance over the whole visible light region is not constant.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: November 4, 2008
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Hiroko Suzuki
  • Publication number: 20080245563
    Abstract: An electromagnetic wave shielding layer 1 comprises a transparent substrate 11, an adhesive layer 13 which is provided as needed, an electromagnetic wave shielding layer 15, and a transparent resin layer 17. The electromagnetic shielding layer 15 includes a mesh portion 103 facing a screen portion 100 of an image displaying device, a transparent resin layer anchoring portion 105 surrounding a periphery of the mesh portion 103 and including openings 105a having an opening ratio lower than that of openings 103a of the mesh portion 103, and a frame portion 107 surrounding an outer periphery of the transparent resin layer anchoring portion 105 and not having openings. The transparent resin layer 17 is provided such that it covers the surfaces of the mesh portion 103 and the transparent resin layer anchoring portion 105 and fills the openings 103a, 105a.
    Type: Application
    Filed: July 25, 2005
    Publication date: October 9, 2008
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Nobuo Naito, Fumihiro Arakawa, Kazuhito Fujii
  • Publication number: 20080151376
    Abstract: An antiglare film (1) comprises: a transparent base film (2), a light-diffusing layer (3) formed on the transparent base film (2), and an antiglare layer (4) formed on the light-diffusing layer (3). The antiglare film (1) has an internal haze value in the range of 35 to 75 and a total haze value in the range of 45 to 85. The light-diffusing layer (3) and/or the antiglare layer (4) contains translucent particles coated with a low-refraction coating.
    Type: Application
    Filed: February 15, 2008
    Publication date: June 26, 2008
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Hiroko Suzuki, Yukimitsu Iwata, Fumihiro Arakawa
  • Patent number: 7375292
    Abstract: An electromagnetic wave shielding filter comprises a transparent substrate 11, and a metal mesh layer 21 with line parts 107 that define openings 105 of the mesh, laminated to one surface of the transparent substrate 11 by an adhesive 13. A first blackening layer 25A and an anticorrosive layer 23A are successively formed on the surfaces, on the transparent substrate side, of the line parts 107 of the metal mesh layer 21. A second blackening layer 25B is formed on surfaces, on the side opposite to the transparent substrate 11, of the line parts 107 of the metal mesh layer 21, and also on side faces of the line parts 107.
    Type: Grant
    Filed: December 14, 2004
    Date of Patent: May 20, 2008
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Nobuo Naito, Fumihiro Arakawa, Tadahiro Masaki
  • 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
  • Publication number: 20080096022
    Abstract: Disclosed is an electromagnetic shielding sheet comprising a transparent base (11) and a mesh metal layer (21) arranged on one side of the transparent base (11) via an adhesive layer (13). The metal layer (21) has a mesh portion (103) wherein many opening portions (105) are surrounded by a line portion (107), and a frame portion (101) arranged around the mesh portion (103). The opening portions (105) are filled with a transparent ionizing radiation-curing resin layer (31).
    Type: Application
    Filed: January 12, 2005
    Publication date: April 24, 2008
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Nobuo Naito, Fumihiro Arakawa, Tadahiro Masaki
  • Publication number: 20080084681
    Abstract: An electromagnetic wave shielding device 1 comprises a transparent substrate 11, an adhesive layer 13 which is provided as needed, an electromagnetic wave shielding layer 15, and a transparent resin layer 17. The electromagnetic wave shielding layer 15 includes a mesh portion 103 facing a screen portion 100 of an image displaying device, a transparent resin layer anchoring portion 105 surrounding a periphery of the mesh portion 103, and including openings 105a having the same opening ratio as that of the openings 103a of the mesh portion 103, and a frame portion 107 surrounding an outer periphery of the transparent resin layer anchoring portion 105, and not having openings. The transparent resin layer 17 is provided such that it covers the surfaces of the mesh portion 103, and the transparent resin layer anchoring portion 105, and fills the openings 103a, 105a.
    Type: Application
    Filed: July 25, 2005
    Publication date: April 10, 2008
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Nobuo Naito, Fumihiro Arakawa, Kazuhito Fujii
  • Patent number: 7354163
    Abstract: An antiglare film (1) comprises: a transparent base film (2), a light-diffusing layer (3) formed on the transparent base film (2), and an antiglare layer (4) formed on the light-diffusing layer (3). The antiglare film (1) has an internal haze value in the range of 35 to 75 and a total haze value in the range of 45 to 85. The light-diffusing layer (3) and/or the antiglare layer (4) contains translucent particles coated with a low-refraction coating.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: April 8, 2008
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Hiroko Suzuki, Yukimitsu Iwata, Fumihiro Arakawa
  • Patent number: 7342619
    Abstract: A polarization light splitting film having a light receiving side and a light transmitting side. The polarization light splitting film includes an optical rotation selection layer at the light receiving side for reflecting one of right and left circularly polarized components of a light beam that is incident on the light receiving side and for transmitting the other one of the right and left circular polarization components of the light beam, and a quarter-wave layer laminated over the optical rotation selection layer at the light transmitting side.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: March 11, 2008
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Fumihiro Arakawa, Keiji Kashima
  • Publication number: 20080032058
    Abstract: An object of the present invention is to eliminate drawbacks of conventional multi-layered antireflection films, that is, that a lot of time is required in the formation of a transparent conductive thin film and a low-refractive index layer leading to low processing speed, the corrosion resistance of the transparent conductive thin film is unsatisfactory, and the reflectance over the whole visible light region is not constant.
    Type: Application
    Filed: August 24, 2007
    Publication date: February 7, 2008
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Fumihiro Arakawa, Hiroko Suzuki
  • Publication number: 20070291463
    Abstract: An electromagnetic wave shielding filter 10 comprises a meshed layer, wherein at least one of the front and back surfaces of the meshed layer is subjected to a blackening treatment to be a blackened face having micro-irregularities. The shape of the micro-irregularities is adjusted to have a probability density curve with a peak point being convex upward wherein the probability density curve is defined as a curve depicted in a graph in which the change of height from the peak value Rp to the bottom value Rv of the deepest valley is shown as the horizontal axis while the probability density expressing the distribution of height is shown as the vertical axis. Also, in the probability density curve, a horizontal tangent can be drawn at its peak point.
    Type: Application
    Filed: February 24, 2006
    Publication date: December 20, 2007
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Tetsuya Ojiri, Fumihiro Arakawa, Yukihiro Kyoden
  • 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
  • Publication number: 20070247568
    Abstract: An antiglare film having excellent durability is disposed on the front of a display device and comprises a transparent plastic film and, formed on the transparent plastic film, at least an antiglare layer having fine concaves and convexes on its surface, wherein the antiglare layer is formed of a transparent resin and satisfies requirements that: (1) the surface of the antiglare layer has a three-dimensional ten-point mean roughness of 0.9 ?m to 3 ?m; and (2) the mean spacing between adjacent profile peaks on a three-dimensional roughness reference plane is 20 ?m to 50 ?m.
    Type: Application
    Filed: June 19, 2007
    Publication date: October 25, 2007
    Applicant: Dai Nippon Printing Co., Ltd
    Inventors: Taiji Suga, Tadahiro Masaki, Fumihiro Arakawa
  • 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: 20070231587
    Abstract: An electromagnetic wave shielding filter 10 comprises a transparent substrate 1, and a mesh layer 3 containing an electrically conductive layer 2, formed on the transparent substrate 1 with a transparent adhesive layer 9. A transparent colored resin layer 4 containing a coloring agent is formed on the mesh layer 3, with a transparent barrier layer 5 interposed between the two layers. An anticorrosive layer 6 and a blackening layer 7 are formed on the electrically conductive layer 2 in the mesh layer 3. The transparent colored resin layer 4 also serves as an adhesive layer, and a functional layer 8, such as an optical filter, a protective sheet, or a display front substrate, is further laminated to the transparent colored resin layer 4.
    Type: Application
    Filed: July 8, 2005
    Publication date: October 4, 2007
    Applicant: Dai Nippon Printing Co, LTD
    Inventors: Nobuo Naito, Fumihiro Arakawa
  • Publication number: 20070188066
    Abstract: An electromagnetic wave shielding material 1 comprises a light-shielding electrical conductor layer 11 having, on its observer-side external surface, a blackening layer 12. The electrical conductor layer 11 comprises a mesh portion 2 that has a large number of openings adjoining one another and faces the center portion 5b of the image-luminescent part 5a of a display device 5, and a frame portion 3 that surrounds the mesh portion 2 and faces the outer edge portion 5c of the image-luminescent part 5a of the display device 5. When trimming the screen of a display D with a black-colored light-shielding layer, since the electromagnetic wave shielding material 1 is used, it is not necessary to perform9 an additional printing step or the like, so that the total number of steps and material cost are not increased. Moreover, such electromagnetic wave shielding material does not cause non-uniformity in light-shielding properties compared with a light-shielding layer formed by printing.
    Type: Application
    Filed: August 29, 2005
    Publication date: August 16, 2007
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Fumihiro Arakawa, Kazuhito Fujii, Yukihiro Kyoden