Patents Assigned to Hitachi
  • Patent number: 8000060
    Abstract: Embodiments of the present invention provide a perpendicular magnetic recording medium having a substrate, a magnetic recording layer and a protective layer. The magnetic recording layer includes a perpendicular recording layer, a magnetic coupling layer and a writing assist layer. The perpendicular recording layer is a Co alloy layer containing an oxide disposed between the magnetic coupling layer and the substrate. The magnetic coupling layer is a ferromagnetic layer disposed between the perpendicular recording layer and the writing assist layer. The writing assist layer is a ferromagnetic layer disposed between the magnetic coupling layer and the protective layer. The saturation magnetization of the magnetic coupling layer is lower than the saturation magnetization of the perpendicular recording layer or the writing assist layer. The thickness of the magnetic coupling layer is 1 nm or more and 3 nm or less.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: August 16, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Zhengang Zhang, Ikuko Takekuma, Kiwamu Tanahashi
  • Patent number: 7997665
    Abstract: A brake control apparatus includes a brake unit. The brake unit includes: a first port set hydraulically connected to a master cylinder via a first fluid line set; a second port set hydraulically connected to a wheel cylinder set via a second fluid line set; a first fluid passage hydraulically connecting the first port set to the second port set; a first switching valve arranged to vary a state of fluid communication through the first fluid passage; a fluid pressure source arranged to produce a fluid pressure supplied to the second port set; a fluid accommodating section adapted to accommodate a variable amount of brake fluid; a branch fluid passage hydraulically connecting the first port set to the fluid accommodating section; and a second switching valve arranged to vary a state of fluid communication through the branch fluid passage.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: August 16, 2011
    Assignee: Hitachi, Ltd.
    Inventor: Chiharu Nakazawa
  • Patent number: 7999565
    Abstract: A visual inspection apparatus and method using the scanning electron microscope are disclosed. An electron beam is scanned repeatedly on a sample, and an inspection and a reference image are generated by the secondary electrons generated from the sample or reflected electrons. From the differential image between the inspection image and the reference image, a defect is determined. The number of pixels in the generated image along the direction of repetitive scanning by the electron beam can be changed.
    Type: Grant
    Filed: January 5, 2009
    Date of Patent: August 16, 2011
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Yasuhiro Gunji, Hiroshi Miyai, Shigeya Tanaka
  • Patent number: 8000194
    Abstract: In an optical disc apparatus, whether an unrecorded recording layer without information recorded thereon is included in the multiple recording layers of the optical disc mounted inside the apparatus is judged. then when the unrecorded recording layer is judged to be present, a signal for focus offset adjustment is recorded in a non-user data recording area of the unrecorded recording layer, and reproduction of the recorded focus offset adjusting signal is followed by its quality evaluation, which is further followed by calculation and setup of an appropriate focus offset value based on evaluation results.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: August 16, 2011
    Assignee: Hitachi-LG Data Storage, Inc.
    Inventors: Tetsuya Fushimi, Masaaki Kurebayashi
  • Patent number: 7999235
    Abstract: A nuclear medicine diagnosis apparatus comprising a mechanical collimator for effecting passage in a given direction of photons with given energy emitted from an object injected or dosed with a drug containing a radioactive isotope; a former-stage detector for detecting positional information at a point of reaction of photons having passed through the mechanical collimator and information on the momentum of charged particles generated by the reaction; a latter-stage detector disposed in the subsequent stage of the former-stage detector to detect information on the photons having been scattered by the former-stage detector; and image reconstruction means for reconstructing an image from detection information having been collected from the former-stage detector and latter-stage detector, wherein the image reconstruction means is built so that differentiation is carried out on the information on the photons having passed through the mechanical collimator and the information on the photons having been scattered b
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: August 16, 2011
    Assignee: Hitachi Medical Corporation
    Inventors: Ryota Kohara, Takashi Shirahata, Tetsuo Nakazawa, Osamu Miyazaki
  • Patent number: 7999932
    Abstract: An inspection apparatus includes a wafer stage for carrying a wafer, an illumination module which irradiates an inspection beam on the wafer carried on the wafer stage, a detection module which detects scattering rays or reflection rays from the wafer on the wafer stage and outputs an image signal, a coordinates control module which stores information about the arrangement of individual inspection areas on the wafer, and an imperfect area recognition module which recognizes, on the basis of the inspection area arrangement information stored in the coordinates control module, an imperfect inspection area interfering with a wafer edge.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: August 16, 2011
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Hiroyuki Yamashita, Yukihisa Mohara, Eiji Imai
  • Patent number: 7998605
    Abstract: Embodiments of the invention provide ways to manufacture an inexpensive high-density magnetic recording medium. A high-density magnetic recording medium is composed of a flat substrate, a nonmagnetic intermediary body having a periodic recessed-relieved structure, and a magnetic film formed on the intermediary body.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: August 16, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Chiseki Haginoya, Takashi Ando, Masahiko Ogino
  • Patent number: 8000183
    Abstract: The present invention provides an object lens actuator, an optical pickup, and an optical disk drive, which can increase the size of the object lens actuator driving a lens holder in the tangential tilt direction, and drive and control the lens holder with a small amount of drive current. An object lens actuator comprising a lens holder having an object lens and a first coil; a first magnet fixed to a yoke; plural elastic support parts for supporting said lens holder with a first fulcrum; a moving part for supporting said elastic support parts with a second fulcrum different from said first fulcrum, and a fixed part having a moving mechanism for moving said moving part, wherein said first coil and said first magnet constitute a first magnetic circuit, said first magnetic circuit makes said lens holder movable in a focusing direction, a tracking direction and a radial tilt direction of an optical disk for read/write, and said moving mechanism makes said moving part movable.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: August 16, 2011
    Assignee: Hitachi Media Electronics Co., Ltd.
    Inventors: Yoshihiro Satou, Hidenao Saito, Jun Hato, Ryuichiro Mizuno, Katsuhiko Kimura
  • Patent number: 8000211
    Abstract: An optical disc apparatus capable of obtaining an effect to reduce the laser noise without shortening the laser diode service life or increasing the power consumption. The optical disc apparatus includes a laser diode for emitting a laser beam, a laser driver for driving the laser diode, a detector for monitoring a first power emitted from the laser diode, a detector for monitoring a second power applied to an optical disc, and an attenuator for attenuating the first power. The light attenuation factor of the attenuator is changed by the ratio between the first power and the second power.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: August 16, 2011
    Assignees: Hitachi, Ltd., Hitachi-LG Data Storage, Inc.
    Inventor: Manabu Shiozawa
  • Patent number: 8001284
    Abstract: Techniques for managing a storage environment. According to an embodiment of the present invention, high-level application programming interfaces (APIs) are provided that can be used by applications such as storage management applications (e.g., ERM applications, SRM applications) to manage a storage environment. Using these APIs, an application can issue simple high-level commands to perform storage management operations without having to worry about the low level storage array-specific commands. Embodiments of the present invention handle the necessary translations between the high-level commands and the low-level storage array-specific commands or protocols.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: August 16, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Steven Quinn, Rick Stout, Justin O'Hagan
  • Patent number: 8001351
    Abstract: A volume group comprising one or a plurality of logical volumes is set. A coexistence avoidance volume group having different array groups can be set to the volume group. Upon execution of preset volume search criteria, a logical volume is specified by carrying out a search in which are excluded array groups to which logical volumes in the coexistence avoidance volume belong.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: August 16, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Fuming Liu, Akihiko Sakaguchi
  • Patent number: 8000939
    Abstract: An object of the present invention is to provide a synthesized signal forming method and an apparatus thereof for realizing both noise reduction and dosage reduction when synthesizing signals detected based on scans performed on a charged particle beam. In order to achieve the above object, with a method that synthesizes signals detected based on a plurality of scans performed on a charged particle beam to form a synthesized signal, a multiplication is performed among a plurality of signals obtained by the plurality of scans and, at the same time, for a multiplied signal, a calculation is performed in which an inverse of the number of previous scans is used as an exponent.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: August 16, 2011
    Assignee: Hitachi High-Technologies Corporation
    Inventor: Atsushi Kobaru
  • Patent number: 8001324
    Abstract: An information processing apparatus and an information processing method capable of assigning, to an application, a volume having a performance required by the application while simplifying administration are proposed. A performance and a capacity of each first storage area respectively provided by each storage device as well as a performance and a capacity required for a volume respectively assigned to each application running on a host system are managed, and based on the performance and the capacity of each first storage area and the performance and the capacity required for the volume to be respectively assigned to each application, the volume having the performance and the capacity required by the application is assigned to the application, and when a plurality of the volumes are assigned to one of the applications, the volumes provided in the same storage device are preferentially assigned.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: August 16, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Masahiro Yamada, Takaki Kuroda
  • Patent number: 7999777
    Abstract: A liquid crystal display device includes a liquid crystal display panel having a first substrate, a second substrate, and a positive liquid crystal sandwiched between the first and second substrates. The liquid crystal display panel includes a plurality of sub pixels which include a first electrode and a second electrode formed on the first substrate. The liquid crystal display panel is configured to drive the liquid crystal by generating an electric field using a difference in potential between the first electrode and the second electrode. The first substrate includes a first alignment film, a plurality of video lines, and a first polarizer, and the second substrate includes a second alignment film, and a second polarizer. Relationships exist among extension directions of the video lines and directions of alignment axis orthogonal thereto, of the alignment films a polarization axis of at least one of the polarizer, and angles therebetween.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: August 16, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Masateru Morimoto, Yasuyuki Yamada
  • Patent number: 7999846
    Abstract: An image processing apparatus connected to a monitoring camera and a display for processing an image input from the monitoring camera includes an image storage storing an image input from the monitoring camera, a characteristic parameter storage storing a characteristic parameter characterizing a specific image, a specific image extraction unit, wherein the specific image extraction unit cuts out images having a plurality of predetermined sizes from all parts of the input image stored in the image storage, executes character evaluation processing for checking whether or not cut out images have an identical character to the specific image for each cut out image, and extracts the cut out images which has an identical character to the specific image by the character evaluation processing, and a display image generation unit for generating a display image for displaying a whole image of the input image and the extraction specific image on the display.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: August 16, 2011
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Masahiro Kiyohara, Kazunori Takahashi, Chieko Onuma, Wataru Ito
  • Publication number: 20110195286
    Abstract: A secondary cell includes: an electrode roll in which a positive foil on which a positive-electrode material is coated and a negative foil on which a negative-electrode material is coated are winded through a separator into a flat shape around a winding core; a case in which the electrode roll is housed; a cover which seals the case; a positive terminal and a negative terminal provided on the cover; a positive electrode current collector plate that is electrically connected to the positive foil of the electrode roll and the positive terminal and held by the cover; and a negative electrode current collector plate that is electrically connected to the negative foil of the electrode roll and the negative terminal and held by the cover. The positive electrode current collector plate and the negative electrode current collector plate are each connected to the winding core.
    Type: Application
    Filed: February 7, 2011
    Publication date: August 11, 2011
    Applicant: Hitachi Vehicle Energy, Ltd.
    Inventors: Kinya AOTA, Toshiro Fujita, Kouichi Kajiwara, Masaaki Iwasa
  • Publication number: 20110195197
    Abstract: A method of manufacturing an ultraviolet cross-linked foam insulated wire includes dissolving a gas in an ultraviolet curable resin composition, subsequently applying the ultraviolet curable resin composition on a conductor, and irradiating ultraviolet light on the ultraviolet curable resin composition to form a foam insulation layer on the conductor. The irradiating of ultraviolet light allows the resin composition to cure and bubbles to grow due to a decrease in solubility of the gas in the resin composition during the curing of the resin composition.
    Type: Application
    Filed: June 8, 2010
    Publication date: August 11, 2011
    Applicant: HITACHI CABLE, LTD.
    Inventors: Tomiya ABE, Yoshihisa KATO
  • Publication number: 20110196968
    Abstract: A computer system that achieves effective utilization of physical servers' resources in a virtual client system is provided. In the virtual client system, the present invention obtains operation information about virtual machines, obtains access information indicating whether a user has logged on to the virtual machines or not, judges from connection information whether the user is using the virtual machines or not, calculates the capacity of the virtual machine(s) which are active, but is not accessed by the user, based on the capacity of resources used by the virtual machine(s), and then identifies the virtual machine(s) used by users from those not used by the users.
    Type: Application
    Filed: March 25, 2009
    Publication date: August 11, 2011
    Applicant: HITACHI, LTD.
    Inventors: Emiko Kobayashi, Kiminori Sugauchi
  • Publication number: 20110197190
    Abstract: There is a need for providing the Xeon CPU with a two-level VM that is independent of VMM types and prevents the throughput from degrading when the OS operates the privilege register. A machine is provided with a processor and memory. The machine includes a first virtual machine manager for managing a virtual machine, a second virtual machine for managing an operating system, first management information, and second management information. The processor is provided with a register and a shadowing function. The machine uses a virtualization method. The first virtual machine manager detects a call from the second virtual machine manager. The first virtual machine manager enables the shadowing function when it is determined that an instruction for enabling the shadowing function caused the call.
    Type: Application
    Filed: December 29, 2010
    Publication date: August 11, 2011
    Applicant: HITACHI, LTD.
    Inventors: Naoya HATTORI, Toshiomi MORIKI, Yoshiko YASUDA
  • Publication number: 20110193509
    Abstract: A power conversion device includes a power switching circuit that supplies AC voltages generated between switching elements operating as upper arms and switching elements operating as lower arms, and a control circuit that generates and supplies to the driver circuit signals for controlling the switching operation of the switching elements by a PWM method in a first operational region in which frequency of an AC power to be outputted is low, and that generates and supplies to the driver circuit signals for controlling the switching operation of the switching elements at timings based upon the phase of the AC power to be outputted in an operational region in which the frequency of the AC power to be outputted is higher than in the first operational region.
    Type: Application
    Filed: February 9, 2011
    Publication date: August 11, 2011
    Applicant: Hitachi, Ltd.
    Inventors: Kazuto OOYAMA, Toshisada Mitsui, Shingo Nishiguchi, Kimihisa Furukawa