Patents by Inventor Seiji Sakai

Seiji Sakai 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: 9007449
    Abstract: An image-capturing apparatus and a repair method thereof are provided. The image-capturing apparatus includes a lens frame to which one or more lenses are fixed; an image-capturing frame to which an image-capturing device is fixed; and a fixing member for fixing the lens frame and the image-capturing frame to each other without adhering a fitted portion between the lens frame and the image-capturing frame. The repair method for the image-capturing apparatus includes destructing a fixing member for fixing to each other a lens frame to which one or more lenses are fixed and an image-capturing frame to which an image-capturing device is fixed, and releasing fixing between the frames; replacing at least either of the lens frame and the image-capturing frame; and fixing to each other the lens frame and the image-capturing frame.
    Type: Grant
    Filed: January 5, 2007
    Date of Patent: April 14, 2015
    Assignees: Olympus Medical Systems Corp., Olympus Corporation
    Inventors: Takahiko Mitani, Kazuhiro Kumei, Kazuyoshi Akiba, Seiji Sakai, Hironobu Ichimura, Masahiro Kawauchi
  • Publication number: 20140355305
    Abstract: An envelope of a point light source includes first to fourth surfaces. The first surface protrudes ahead of a light-emitting element and extends to a left side and a right side of the light-emitting element when viewed from the light-emitting element. The second surface is connected to the first surface on the left side and the right side of the light-emitting element and is in contact with the light-emitting element. The third surface is connected to an upper end of the first surface and an upper end of the second surface and forms a first depression that sinks from the first surface toward the second surface. The fourth surface is connected to a lower end of the first surface and a lower end of the second surface and forms a second depression that sinks from the first surface toward the second surface.
    Type: Application
    Filed: April 14, 2014
    Publication date: December 4, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Seiji SAKAI
  • Patent number: 8885118
    Abstract: It is an object of the invention to provide a technique capable of suppressing variations in luminance in the vicinity of a light entrance surface of a light guide plate. An illumination device includes a point light source, and a light guide plate having a side surface serving as a light entrance surface opposed to the point light source, and a main surface serving as a light exit surface. The light entrance surface of the light guide plate is provided with unevenness formed by arraying at predetermined pitches a plurality of protrusions each projecting from the light entrance surface and extending in a direction perpendicular to the light exit surface. Each of the top surface and the bottom surface of the unevenness is provided with a plurality of micro protrusions each extending in the direction perpendicular to the light exit surface and having a height smaller than the above protrusion.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: November 11, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akimasa Yuuki, Kenji Itoga, Naoko Iwasaki, Takafumi Kokusho, Yuji Tsuchiyama, Seiji Sakai
  • Patent number: 8851223
    Abstract: A motor mounting structure including: a left and right pair of side section members disposed at two vehicle width direction sides of a vehicle body with a length direction of the side section members being along a vehicle front-rear direction; a first cross member spanning across a vehicle width direction between the pair of side section members; a second cross member spanning across the vehicle width direction between the pair of side section members, and disposed offset in a vehicle top-bottom direction with respect to the first cross member as viewed from directly in front of the vehicle body; and a coupling member coupling together the first cross member and the second cross member, with an attaching portion of a motor to be mounted to the vehicle body attached to the coupling member.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: October 7, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Taichi Yamashita, Seiji Sakai
  • Publication number: 20140133180
    Abstract: A planar light source device with highly uniform intensity and high light utilization efficiency, and a display apparatus incorporating the same, are provided. A light guide plate, configured by a material such as plate-shaped and transparent acryl resin, polycarbonate resin, or glass, causes incident light to propagate within the light guide plate and then to exit the light through an exit surface as a surface emitting light. A first recess is formed substantially in the center of the exit surface. The first recess is cylinder-shaped, and on a bottom thereof is provided a lens that refracts incident light from a light source, in a direction away from the center of a circle on the bottom.
    Type: Application
    Filed: January 23, 2014
    Publication date: May 15, 2014
    Applicant: Mitsubishi Electric Corporation
    Inventor: Seiji SAKAI
  • Publication number: 20130300981
    Abstract: A planar light source apparatus includes a light guide plate, an LED arranged on a side surface of the light guide plate, and a functional liquid crystal film. The functional liquid crystal film is provided in a non-light-emitting surface of the light guide plate which is opposite to a light-emitting surface of the light guide plate, and is divided into a plurality of block region. Each of the block regions is individually controllable. Specifically, reflection and transmission of the functional liquid crystal film in each of the block regions are controlled according to an electrical signal, such as voltage.
    Type: Application
    Filed: May 2, 2013
    Publication date: November 14, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Seiji SAKAI
  • Publication number: 20130265646
    Abstract: The display apparatus of the present invention is a display apparatus for a head-up display, and is provided with a liquid crystal display which has a single display region including a first display region and a second display region, a half mirror which reflects first exit light exiting from the first display region of the liquid crystal display, and a plane mirror which reflects second exit light exiting from the second display region of the liquid crystal display toward the half mirror. The first exit light which has been reflected by the half mirror and the second exit light which has penetrated the half mirror are led out of the apparatus in an overlapping state.
    Type: Application
    Filed: March 8, 2013
    Publication date: October 10, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventor: Seiji SAKAI
  • Patent number: 8425405
    Abstract: An electronic endoscope apparatus includes: an image pickup apparatus mounted at a distal end portion of an insertion portion; an operation portion provided consecutively at the insertion portion, with a frame member incorporated therein; and an electrical cable extended from the operation portion for connection with an external device. In the electronic endoscope apparatus, the frame member has a circuit board portion which establishes electrical connection between shields of the insertion portion and the electrical cable, and on which various electronic parts for exchanging signals with the image pickup apparatus are mounted. In spite of the arrangement of the image pickup apparatus that can acquire high-quality images at a distal end portion of the insertion portion, a size of the apparatus, in particular, a diameter of the insertion portion, can be prevented from being increased.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: April 23, 2013
    Assignee: Olympus Medical Systems Corp.
    Inventors: Takahiko Mitani, Akira Muramatsu, Seiji Sakai, Tomoaki Yamashita, Masahiro Kawauchi, Yuichi Wataya
  • Patent number: 8427533
    Abstract: An image pickup apparatus of the present invention varies optical properties by moving a part of lenses of an objective lens, and includes a solid-state image pickup device unit that is disposed at a rear-end section and that subjects a subject image to photoelectric conversion, a fixed lens frame that retains the objective lens that is disposed in front of the solid-state image pickup device unit, a movable lens frame that retains the part of lenses that moves along a photographing optical axis O inside the lens frame, and an actuator having one end connected to the movable lens frame and that moves the movable lens frame forward and backward. The actuator includes a rigid member provided so as to extend to the vicinity of the rear end at which the solid-state image pickup device unit is disposed and a shape memory alloy that is coupled to the rigid member.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: April 23, 2013
    Assignee: Olympus Medical Systems Corp.
    Inventors: Seiji Sakai, Tomoaki Yamashita, Masahiro Kawauchi, Takahiko Mitani, Yuuya Ishida, Seiji Iwasaki
  • Patent number: 8360965
    Abstract: An endoscopic image pickup unit includes: a first fixed lens frame which holds a first objective lens group; a second fixed lens frame which, being fitted over the first fixed lens frame, holds a second objective lens group; a movable lens frame which, being installed in the second fixed lens frame so as to be able to move forward and backward along a photographic optical axis, holds a movable lens; and a deformation preventing member which, being interposed between a distal end body and the second fixed lens frame, prevents the second fixed lens frame from being deformed by fixing force of the fixing member when the endoscopic image pickup unit is fixed to the distal end body.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: January 29, 2013
    Assignee: Olympus Medical Systems Corp.
    Inventors: Toru Kuchimaru, Seiji Sakai
  • Publication number: 20120307519
    Abstract: A planar light source apparatus includes a point light source and a light guide plate shaped like a flat plate with a rectangular shape in a plan view. The light guide plate includes an output surface confronting an opening portion, a pair of second side surfaces opposed to each other, and a hole opening in a non-output surface and formed near one of the first side surfaces at a position where the point light source is to be arranged. Each of the pair of second side surfaces is at least partially configured as a prism whose ridge line extends in a direction perpendicular to the output surface and whose cross-section, when sectioned in a direction parallel to the output surface, has a sawtooth-like shape in which concavity and convexity are repeated. A light of the point light source can be efficiently uniformized in the light guide plate, and thus unevenness of brightness can be prevented.
    Type: Application
    Filed: April 28, 2010
    Publication date: December 6, 2012
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Seiji Sakai
  • Publication number: 20120292124
    Abstract: A motor mounting structure including: a left and right pair of side section members disposed at two vehicle width direction sides of a vehicle body with a length direction of the side section members being along a vehicle front-rear direction; a first cross member spanning across a vehicle width direction between the pair of side section members; a second cross member spanning across the vehicle width direction between the pair of side section members, and disposed offset in a vehicle top-bottom direction with respect to the first cross member as viewed from directly in front of the vehicle body; and a coupling member coupling together the first cross member and the second cross member, with an attaching portion of a motor to be mounted to the vehicle body attached to the coupling member.
    Type: Application
    Filed: April 24, 2012
    Publication date: November 22, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Taichi YAMASHITA, Seiji SAKAI
  • Publication number: 20120140519
    Abstract: A surface light source apparatus capable of keeping a high in-plane brightness uniformity and a high light utilization efficiency without increasing the size of a frame, and also to provide a display apparatus including the surface light source apparatus. The surface light source apparatus includes a point light source, and a light guide plate having a hole formed near first side surface that is one side surface thereof, the hole being formed at a position where the point light source is to be arranged. The first side surface of the light guide plate has, in a portion thereof near the hole, a prism having a saw-toothed shape in a cross-section thereof parallel to a front surface of the light guide plate.
    Type: Application
    Filed: November 5, 2010
    Publication date: June 7, 2012
    Applicant: Mitsubishi Electric Corporation
    Inventor: Seiji Sakai
  • Publication number: 20120127400
    Abstract: It is an object of the invention to provide a technique capable of suppressing variations in luminance in the vicinity of a light entrance surface of a light guide plate. An illumination device includes a point light source, and a light guide plate having a side surface serving as a light entrance surface opposed to the point light source, and a main surface serving as a light exit surface. The light entrance surface of the light guide plate is provided with unevenness formed by arraying at predetermined pitches a plurality of protrusions each projecting from the light entrance surface and extending in a direction perpendicular to the light exit surface. Each of the top surface and the bottom surface of the unevenness is provided with a plurality of micro protrusions each extending in the direction perpendicular to the light exit surface and having a height smaller than the above protrusion.
    Type: Application
    Filed: November 16, 2011
    Publication date: May 24, 2012
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akimasa YUUKI, Kenji Itoga, Naoko Iwasaki, Takafumi Kokusho, Yuji Tsuchiyama, Seiji Sakai
  • Patent number: 7961412
    Abstract: An actuator apparatus of the present invention includes a movable body that is arranged so as to be movable forward or rearward, and a shape memory alloy wire that is provided directly or indirectly to the movable body so as to enter a non-tension state at an ordinary temperature. The shape memory alloy wire is subjected to expansion/contraction control in which an electric current is applied thereto from a power supply portion of an external control circuit portion to change a temperature thereof to a predetermined temperature.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: June 14, 2011
    Assignee: Olympus Medical Systems Corp.
    Inventors: Seiji Iwasaki, Toru Kuchimaru, Yuuya Ishida, Seiji Sakai
  • Patent number: 7946602
    Abstract: A stabilizer configured to connect suspension devices situated right and left of an automobile, the stabilizer is characterized in that the stabilizer extends below a suspension member where a steering device of the automobile is fixed; at a side of the suspension member, the stabilizer extends above a lower arm and toward a front of the automobile; and the stabilizer is connected to the suspension devices.
    Type: Grant
    Filed: July 4, 2006
    Date of Patent: May 24, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Shimatani, Satoshi Murata, Seiji Sakai, Masao Tajima, Makoto Kobayashi, Keiichi Kondo, Shinji Iwasa, Kimihiro Kuji
  • Patent number: 7762705
    Abstract: A surface light source device according to the invention includes a housing having an opening portion on at least one face, an LED light source held by one face of the housing opposing the opening portion, and a light guiding plate arranged at a position so as to cover the opening portion and the LED light source. The light guiding plate includes a recess provided at a position corresponding to the LED light source for storing a part of the LED light source. A light quantity adjusting means is provided at a bottom part of the recess for adjusting light from the LED light source. The light quantity adjusting means includes a reflection sheet having a reflection function and a transmission function in which a total light transmittance t satisfies t??r2 cos ?/{(1?cos ?)(S??r2)}, supposing that an average radius is defined as r, a distance from the LED light source is defined as H, a light-emitting area of the LED light source is defined as S, and a total light quantity is defined as L.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: July 27, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventors: Seiji Sakai, Toshiyuki Yoneda
  • Patent number: 7708444
    Abstract: A primary object of the present invention is to provide a surface light source device attaining a homogenous luminance distribution on a light emitting surface of a light guiding plate in which a dot light source having a high directivity of emitted light is employed. The device includes: a light guiding plate 5 including a plurality of primary holes in such a manner as to locate each dot light source 3 inside; and dot printing 7a being employed as an auxiliary light source means which diffuses light from the dot light source 3 to the position between dot light sources 3 being adjacent to each other, wherein the dot printing 7 is provided at a base of the light guiding plate 5 and a middle point of the connected dot light sources 3 being adjacent to each other.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: May 4, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Seiji Sakai, Takuya Sakamoto, Toshiyuki Yoneda
  • Publication number: 20100079980
    Abstract: A planar light source device with highly uniform intensity and high light utilization efficiency, and a display apparatus incorporating the same, are provided. A light guide plate, configured by a material such as plate-shaped and transparent acryl resin, polycarbonate resin, or glass, causes incident light to propagate within the light guide plate and then to exit the light through an exit surface as a surface emitting light. A first recess is formed substantially in the center of the exit surface. The first recess is cylinder-shaped, and on a bottom thereof is provided a lens that refracts incident light from a light source, in a direction away from the center of a circle on the bottom.
    Type: Application
    Filed: September 30, 2009
    Publication date: April 1, 2010
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Seiji SAKAI
  • Publication number: 20100063361
    Abstract: An endoscopic image pickup unit includes: a first fixed lens frame which holds a first objective lens group; a second fixed lens frame which, being fitted over the first fixed lens frame, holds a second objective lens group; a movable lens frame which, being installed in the second fixed lens frame so as to be able to move forward and backward along a photographic optical axis, holds a movable lens; and a deformation preventing member which, being interposed between a distal end body and the second fixed lens frame, prevents the second fixed lens frame from being deformed by fixing force of the fixing member when the endoscopic image pickup unit is fixed to the distal end body.
    Type: Application
    Filed: September 1, 2009
    Publication date: March 11, 2010
    Applicant: OLYMPUS MEDICAL SYSTEMS CORP.
    Inventors: Toru KUCHIMARU, Seiji SAKAI