Patents by Inventor Yasuhisa Shiraishi

Yasuhisa Shiraishi 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: 8749731
    Abstract: A lighting device including a light source, a light guide plate, a first prism sheet which is arranged over the light guide plate, and a second prism sheet which is arranged between the first prism sheet and the light guide plate. The first prism sheet includes first prisms which are formed parallel to each other in the first direction on a first surface which is opposite to the second prism sheet, and the second prism sheet includes second prisms.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: June 10, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tetsuya Oshima, Hirotaka Imayama, Yasuhisa Shiraishi, Yoshiharu Nagae
  • Patent number: 8582056
    Abstract: A lightguide to be used in a liquid crystal display device includes a light exit surface, a reflection surface opposed to the light exit surface, and a light entrance surface, which is one side surface. In a region of the light exit surface or the reflection surface, which is on a front side of an intermediate portion between two light sources when viewed from the light entrance surface, a plurality of local-area line-shaped protrusions are arranged, which are extending in a first direction. Each of the local-area line-shaped protrusions reflects the entered light so that a component of the entered light which is orthogonal to the first direction is weakened. A length of a local-area line-shaped protrusion farthest from the two adjacent light sources, is larger than a length of a local-area line-shaped protrusion closest to any one of the two adjacent light sources.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: November 12, 2013
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yasuhisa Shiraishi, Takashi Kuwabara
  • Publication number: 20130265512
    Abstract: A lighting device including a light source, a light guide plate, a first prism sheet which is arranged over the light guide plate, and a second prism sheet which is arranged between the first prism sheet and the light guide plate. The first prism sheet includes first prisms which are formed parallel to each other in the first direction on a first surface which is opposite to the second prism sheet, and the second prism sheet includes second prisms.
    Type: Application
    Filed: May 22, 2013
    Publication date: October 10, 2013
    Inventors: Tetsuya Oshima, Hirotaka Imayama, Yasuhisa Shiraishi, Yoshiharu Nagae
  • Patent number: 8523421
    Abstract: To prevent, in a backlight where light emitting diodes are arranged on a side surface of a light guide plate, light leakage from a reflection sheet and reduce non-uniformity of emission light from the backlight. In a liquid crystal display device that includes a backlight that irradiates a liquid crystal panel with light, LEDs are disposed as light emitting elements on a light guide plate that is disposed in the backlight, a reflection sheet that comprises a multilayer film is disposed on a bottom surface of the light guide plate, projections are disposed by sandblasting on the bottom surface of the light guide plate in the vicinity of the LEDs, and tight adhesion between the reflection sheet and the light guide plate is prevented. In the vicinity of the LEDs, in order to counter light non-uniformity, reflecting grooves are not disposed and it is a mirror surface, but tight adhesion can be prevented by disposing the projections.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: September 3, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masayoshi Furuyama, Masahiko Kurihara, Yasuhisa Shiraishi
  • Patent number: 8514348
    Abstract: A light guide plate is for reflecting incident light from an end surface thereof in an inside to obtain surface emission from a front surface thereof. The light guide plate includes protrusions and recesses formed on one of the front surface and a rear surface on an opposite side of the front surface. The protrusions and recesses are formed of a shape in which first mountain-range shapes each including a first ridge continuing along a first direction, which is a direction toward the inside from the end surface, and second mountain-range shapes each including a second ridge continuing along a second direction intersecting with the first direction are combined. Each first mountain-range shape includes a pair of first side surfaces on both sides of the first ridge. Each second mountain-range shape includes a pair of second side surfaces on both sides of the second ridge.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: August 20, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yasuhisa Shiraishi, Atsushi Tsuruoka, Shigeki Nishizawa
  • Patent number: 8456591
    Abstract: A liquid crystal display device includes a liquid crystal display panel, and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of optical sheets, and at least one optical sheet is displaced so as to adjust a viewing angle.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: June 4, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tetsuya Oshima, Hirotaka Imayama, Yasuhisa Shiraishi, Yoshiharu Nagae
  • Patent number: 8441596
    Abstract: This invention provides a liquid crystal display device where the brightness of the backlight can be prevented from lowering when the liquid crystal display device and its frame are thin. The liquid crystal display device has a liquid crystal display panel and a backlight for radiating light on the rear of the liquid crystal display panel, and is characterized in that the backlight has light emitting diodes LED that are secured on one surface of a flexible printed circuit FPC and a light guide plate for guiding light emitted from the light emitting diodes, the flexible printed circuit has openings in a portion between the light emitting diodes and the light guide plate, which extends partly over the light emitting areas (EA) of the light emitting diodes, and a reflective member is provided on the other surface of the flexible printed circuit so as to cover the openings.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: May 14, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yasuhisa Shiraishi, Ryosuke Miyachi
  • Publication number: 20120320310
    Abstract: A lighting device includes a light source 30, a light guide 20 provided adjacent to the light source 30 and including a light source light incident surface 21 on which light emitted by the light source 30 enters and a planar light emission surface 22 from which planar light is emitted, and an optical sheet 50 including a planar light incident surface 53 on which the planar light enters, and configured to change a traveling direction of the planar light because a light emission side of the optical sheet 50 has a shape in which plural columnar prisms 51 extending in parallel to the light source light incident surface 21 are arranged side by side. In each of the prisms 51, a distal surface has at least different two kinds of inclination angles.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 20, 2012
    Inventors: Masaya ADACHI, Akiyoshi TOBE, Yasuhisa SHIRAISHI
  • Publication number: 20120195064
    Abstract: Provided is a display device including: a light guide plate arranged so that an edge surface thereof is opposed to a light source, the light guide plate being configured to internally reflect light entering from the edge surface to cause planar light emission from a front surface of the light guide plate; and a reflective sheet arranged so as to be opposed to a rear surface of the light guide plate. Irregularities are formed on the front surface. The irregularities are formed to have a shape of a combination of first convex portions and second convex portions, each of the first convex portions including a first ridge line which continuously extends along a first direction corresponding to a light traveling direction, each of the second convex portions including a second ridge line which continuously extends along a second direction intersecting the first direction.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 2, 2012
    Inventors: Kentaro OKU, Yasuhisa SHIRAISHI, Masao UEHARA, Akiyoshi TOBE, Takashi KUWABARA
  • Publication number: 20120127399
    Abstract: A lightguide to be used in a liquid crystal display device includes a light exit surface, a reflection surface opposed to the light exit surface, and a light entrance surface, which is one side surface. In a region of the light exit surface or the reflection surface, which is on a front side of an intermediate portion between two light sources when viewed from the light entrance surface, a plurality of local-area line-shaped protrusions are arranged, which are extending in a first direction. Each of the local-area line-shaped protrusions reflects the entered light so that a component of the entered light which is orthogonal to the first direction is weakened. A length of a local-area line-shaped protrusion farthest from the two adjacent light sources, is larger than a length of a local-area line-shaped protrusion closest to any one of the two adjacent light sources.
    Type: Application
    Filed: November 16, 2011
    Publication date: May 24, 2012
    Inventors: Yasuhisa SHIRAISHI, Takashi Kuwabara
  • Patent number: 8164711
    Abstract: A liquid crystal display device which can make the surface brightness of an edge-light-type backlight uniform is provided. The liquid crystal display device includes a liquid crystal display panel and a backlight which radiates light to the liquid crystal display panel. The backlight includes a light guide plate which is arranged on a back side of the liquid crystal display panel, a light source arranged on an outer peripheral portion of a first main surface of the light guide plate which faces the liquid crystal display panel in an opposed manner, and a reflection sheet which is arranged on a back side of the light guide plate as viewed from the liquid crystal display panel. The light guide plate is made of a transparent resin having a refractive index of 1.53 or less.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: April 24, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yasuhisa Shiraishi, Atsushi Tsuruoka, Akiyoshi Tobe, Shigeki Nishizawa, Toshihiro Yajima
  • Publication number: 20120009621
    Abstract: The present invention relates to an antibody or antibody fragment comprising novel Cys residue, to which a hydrophilic macromolecular group or amphipathic macromolecular group can be bound at a high efficiency. In addition, the present invention relates to a monoclonal antibody modified product or an antibody fragment modified product in which cysteine residue is chemically modified.
    Type: Application
    Filed: March 28, 2011
    Publication date: January 12, 2012
    Applicant: KYOWA HAKKO KIRIN CO., LTD
    Inventors: Motoo YAMASAKI, Yasuhisa SHIRAISHI
  • Publication number: 20110216268
    Abstract: A light guide plate is for reflecting incident light from an end surface thereof in an inside to obtain surface emission from a front surface thereof. The light guide plate includes protrusions and recesses formed on one of the front surface and a rear surface on an opposite side of the front surface. The protrusions and recesses are formed of a shape in which first mountain-range shapes each including a first ridge continuing along a first direction, which is a direction toward the inside from the end surface, and second mountain-range shapes each including a second ridge continuing along a second direction intersecting with the first direction are combined. Each first mountain-range shape includes a pair of first side surfaces on both sides of the first ridge. Each second mountain-range shape includes a pair of second side surfaces on both sides of the second ridge.
    Type: Application
    Filed: March 2, 2011
    Publication date: September 8, 2011
    Inventors: Yasuhisa Shiraishi, Atsushi Tsuruoka, Shigeki Nishizawa
  • Patent number: 7999887
    Abstract: A liquid crystal display device includes a display panel, a backlight which radiates light to the display panel, a light emitting element which is mounted on the backlight, and a light guide plate on which light from the light emitting element is incident. The light guide plate has an upper surface and a bottom surface. The bottom surface has grooves formed therein delimited by at least one surface which extends at a slant with respect to the bottom surface. A reflection sheet is provided which reflects the light radiated from the bottom surface. The grooves are formed to produce a first light which is reflected on the grooves and a second light which is radiated from the grooves and is reflected on the reflection sheet, and an asymmetric prism sheet is arranged on the light guide plate.
    Type: Grant
    Filed: September 8, 2010
    Date of Patent: August 16, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yasuhisa Shiraishi, Akiyoshi Tobe, Nobuyuki Koganezawa
  • Publication number: 20110164202
    Abstract: This invention provides a liquid crystal display device where the brightness of the backlight can be prevented from lowering when the liquid crystal display device and its frame are thin. The liquid crystal display device has a liquid crystal display panel and a backlight for radiating light on the rear of the liquid crystal display panel, and is characterized in that the backlight has light emitting diodes LED that are secured on one surface of a flexible printed circuit FPC and a light guide plate for guiding light emitted from the light emitting diodes, the flexible printed circuit has openings in a portion between the light emitting diodes and the light guide plate, which extends partly over the light emitting areas (EA) of the light emitting diodes, and a reflective member is provided on the other surface of the flexible printed circuit so as to cover the openings.
    Type: Application
    Filed: January 5, 2011
    Publication date: July 7, 2011
    Inventors: Yasuhisa SHIRAISHI, Ryosuke Miyachi
  • Publication number: 20100328581
    Abstract: A liquid crystal display device includes a display panel, a backlight which radiates light to the display panel, a light emitting element which is mounted on the backlight, and a light guide plate on which light from the light emitting element is incident. The light guide plate has an upper surface and a bottom surface. The bottom surface has grooves formed therein delimited by at least one surface which extends at a slant with respect to the bottom surface. A reflection sheet is provided which reflects the light radiated from the bottom surface. The grooves are formed to produce a first light which is reflected on the grooves and a second light which is radiated from the grooves and is reflected on the reflection sheet, and an asymmetric prism sheet is arranged on the light guide plate.
    Type: Application
    Filed: September 8, 2010
    Publication date: December 30, 2010
    Inventors: Yasuhisa SHIRAISHI, Akiyoshi TOBE, Nobuyuki KOGANEZAWA
  • Patent number: 7796213
    Abstract: In a liquid crystal display device using a light emitting diode as a light source, even when a plurality of light emitting elements are provided, an inclined surface is formed on a light guide plate as a reflection surface, and a light is converged in the liquid-crystal-panel direction using the reflection surface. In a liquid crystal display device which includes a backlight for radiating a light toward a liquid crystal panel, LEDs are formed on the light guide plate which is mounted on the backlight as light emitting elements. The plurality of LEDs are arranged along a side surface of the light guide plate, and a first reflection surface and a second reflection surface are formed on a bottom surface of the light guide plate. The second reflection surface is arranged closer to the LEDs than the first reflection surface and an angle of the second reflection surface is set larger than an angle of the first reflection surface.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: September 14, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Yasuhisa Shiraishi, Akiyoshi Tobe, Nobuyuki Koganezawa
  • Patent number: 7719632
    Abstract: The present invention provides a liquid crystal display device which can largely enhance a property of focusing light from a backlight. The backlight arranged on a back surface of a liquid crystal panel includes a light guide plate, a light source, a first asymmetrical prism sheet, and a second asymmetrical prism sheet. A reflection surface having an inclination of 2° or less for guiding light from the light source toward the liquid crystal display panel is formed on a back surface of the light guide plate. The first asymmetrical prism sheet and the second asymmetrical prism sheet respectively include projecting portions which extend in the arrangement direction of the light source and are arranged in parallel to each other in the direction which intersects the arrangement direction of the light source.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: May 18, 2010
    Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.
    Inventors: Nobuyuki Koganezawa, Akiyoshi Tobe, Yasuhisa Shiraishi
  • Publication number: 20100110333
    Abstract: A liquid crystal display device includes a liquid crystal display panel, and a backlight which is arranged on a back surface of the liquid crystal display panel, wherein the backlight includes a plurality of optical sheets, and at least one optical sheet is displaced so as to adjust a viewing angle.
    Type: Application
    Filed: October 29, 2009
    Publication date: May 6, 2010
    Inventors: Tetsuya OSHIMA, Hirotaka Imayama, Yasuhisa Shiraishi, Yoshiharu Nagae
  • Publication number: 20090284688
    Abstract: A liquid crystal display device which can make the surface brightness of an edge-light-type backlight uniform is provided. The liquid crystal display device includes a liquid crystal display panel and a backlight which radiates light to the liquid crystal display panel. The backlight includes a light guide plate which is arranged on a back side of the liquid crystal display panel, a light source arranged on an outer peripheral portion of a first main surface of the light guide plate which faces the liquid crystal display panel in an opposed manner, and a reflection sheet which is arranged on a back side of the light guide plate as viewed from the liquid crystal display panel. The light guide plate is made of a transparent resin having a refractive index of 1.53 or less.
    Type: Application
    Filed: May 12, 2009
    Publication date: November 19, 2009
    Inventors: Yasuhisa SHIRAISHI, Atsushi Tsuruoka, Akiyoshi Tobe, Shigeki Nishizawa, Toshihiro Yajima