Patents by Inventor Hirofumi Oosawa

Hirofumi Oosawa 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: 9690034
    Abstract: An illumination device (10) is provided with the following: light sources (11); a light-guide member (12 (13)) that includes a light entry region (Is) and a light exit region (Os) which emits planar light; light entry portions (13a) that are formed in the light entry region (Is) and that oppose the light sources (11); and bright line suppression portions (20) that are formed in the areas between the light entry portions (13a) at the front side of the light entry region (Is), and that include bright line suppression prisms (21) which have a shape that changes the angle of the light emitted in a direction spreading out from the light sources (11) to a direction closer to the optical axes.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: June 27, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Ichiro Umekawa, Hirofumi Oosawa, Takeshi Ishida, Ryuzo Yuki, Masaki Kageyama, Shugo Yagi
  • Patent number: 9671547
    Abstract: Provided are an illumination device capable of improving the uniformity in brightness of the illumination light, and a display device using the same. An illumination device is provided with: a plurality of light sources arranged in a row in one direction; and a light guide plate which has, along a side edge face, a light receiving face facing the light source, guides light entering through the light receiving face, and outputs illumination light from a light emitting surface disposed on the front surface; the light guide plate having a plurality of prisms and a plurality of prisms provided in an indented manner on the front or rear surface and arranged in a row along the longitudinal direction of the light receiving face; the prisms being formed spanning between the light receiving face and the opposing face opposite the light receiving face; and the prisms being formed, between adjacent prisms, deeper than the prisms within a predetermined range in the vicinity of the light receiving face.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: June 6, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Ichiro Umekawa, Hirofumi Oosawa, Takeshi Ishida, Ryuzo Yuki, Masaki Kageyama, Shugo Yagi
  • Publication number: 20150168631
    Abstract: An illumination device (10) is provided with the following: light sources (11); a light-guide member (12 (13)) that includes a light entry region (Is) and a light exit region (Os) which emits planar light; light entry portions (13a) that are formed in the light entry region (Is) and that oppose the light sources (11); and bright line suppression portions (20) that are formed in the areas between the light entry portions (13a) at the front side of the light entry region (Is), and that include bright line suppression prisms (21) which have a shape that changes the angle of the light emitted in a direction spreading out from the light sources (11) to a direction closer to the optical axes.
    Type: Application
    Filed: July 23, 2013
    Publication date: June 18, 2015
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Ichiro Umekawa, Hirofumi Oosawa, Takeshi Ishida, Ryuzo Yuki, Masaki Kageyama, Shugo Yagi
  • Publication number: 20150131309
    Abstract: Provided are an illumination device capable of improving the uniformity in brightness of the illumination light, and a display device using the same. An illumination device is provided with: a plurality of light sources arranged in a row in one direction; and a light guide plate which has, along a side edge face, a light receiving face facing the light source, guides light entering through the light receiving face, and outputs illumination light from a light emitting surface disposed on the front surface; the light guide plate having a plurality of prisms and a plurality of prisms provided in an indented manner on the front or rear surface and arranged in a row along the longitudinal direction of the light receiving face; the prisms being formed spanning between the light receiving face and the opposing face opposite the light receiving face; and the prisms being formed, between adjacent prisms, deeper than the prisms within a predetermined range in the vicinity of the light receiving face.
    Type: Application
    Filed: April 18, 2013
    Publication date: May 14, 2015
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Ichiro Umekawa, Hirofumi Oosawa, Takeshi Ishida, Ryuzo Yuki, Masaki Kageyama, Shugo Yagi
  • Patent number: 6138345
    Abstract: A matrix-switch-board unit has two wiring-pattern arrays which are respectively formed in opposite sides of the unit so as to be electrically isolated from and to cross each other, respective through holes extending between and through the crossing portions of the wiring pattern arrays on the opposite sides of the unit. A connection pin inserting and extracting device automatically and selectively inserts a connection pin into a selected one of the through holes for interconnecting the corresponding opposed, crossing pattern portions and extracts a connection pin from a corresponding one of the through holes for disconnecting same. Pivotally mounted toggle arms of the device have respective ends with laterally extending hook portions in opposed relationship and are rotatable in a first sense to engage a pin between the hook portions and in an opposite sense to release a connection pin engaged thereby.
    Type: Grant
    Filed: February 18, 1998
    Date of Patent: October 31, 2000
    Assignee: Fujitsu Limited
    Inventors: Toshihiro Suzuki, Naoto Kaneko, Eiichi Kakihara, Koichi Shimamura, Yasunori Hachiyama, Hirofumi Oosawa, Hitoshi Isobe
  • Patent number: 5790651
    Abstract: Automatic distribution equipment for connecting and disconnecting lines includes a frame body, a plurality of matrix-switch-board units arranged in the frame body in a stack formation, and a robot provided in a side of the frame body. Each of the matrix-switch-board units has two wiring-pattern arrays which are respectively formed in opposite sides of each of the units so as to be electrically isolated from each other and to cross each other, wherein when a connection pin is inserted into one of through holes formed at cross points of the two wiring-pattern arrays, respective wiring patterns of the two wiring-pattern arrays are connected to each other. The robot moves between two of the matrix-switch-board units, and inserts-and-extracts the connection pin into-and-from a designated through hole to connect-and-disconnect designated lines.
    Type: Grant
    Filed: June 12, 1996
    Date of Patent: August 4, 1998
    Assignee: Fujitsu Limited
    Inventors: Toshihiro Suzuki, Naoto Kaneko, Eiichi Kakihara, Koichi Shimamura, Yasunori Hachiyama, Hirofumi Oosawa, Hitoshi Isobe