Patents Assigned to Hitachi
  • Patent number: 7672224
    Abstract: To reduce the load on a host for controlling a data doubling. Between a host and two disk subsystems, there is connected a data doubling device. This data doubling device behaves as if it were a unit disk subsystem for the host. The data doubling device doubles a data I/O instruction from the host and issues the doubled data I/O instruction to two disk subsystems. In case either of the disk subsystems becomes faulty, the data doubling device sends the data I/O instruction from the host only to the normal disk subsystem. After the fault recovery, the data doubling device performs a data copy between the disk subsystems.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: March 2, 2010
    Assignee: Hitachi, Ltd.
    Inventor: Takashi Asako
  • Patent number: 7671558
    Abstract: The present invention provides an induction motor controller which includes: a circuit for generating a d-axis current reference signal from a d-axis current command value and a periodically varying periodic signal; a d-axis current controller for controlling a d-axis motor current flowing through an induction motor to be controlled to match the d-axis current reference signal; parameter determining means for calculating and determining a motor parameter of the induction motor based on a deviation of the d-axis motor current from the d-axis current reference signal, and controlling a voltage applied to the induction motor using a compensation voltage calculated from the calculated and determined motor parameter, in which a control parameter for controlling the induction motor is set based on the calculated and determined motor parameter.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: March 2, 2010
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kouki Yamamoto, Toshiaki Okuyama, Hiroyuki Tomita, Yoshitaka Iwaji, Koichiro Nagata
  • Patent number: 7673168
    Abstract: A switch includes a reference log storage table for storing a plurality of reference logs for performing normal connection processing between network nodes, a connection candidate log search program for searching for a connection candidate log from among a plurality of reference logs based on a failure log acquired when a connection failure occurs between network nodes; and a re-connection program for re-connecting the network nodes by using the connection candidate log.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: March 2, 2010
    Assignee: Hitachi, Ltd.
    Inventor: Yasuhiro Matsuda
  • Patent number: 7671901
    Abstract: An image processing apparatus has an input portion for receiving video signals, an illumination sensor for detecting illumination of an environmental light, a corrector for correcting the video signals, and a controller for controlling the corrector to correct the video signals in accordance with distribution of luminance or hue or saturation of the video signals and with the detected illumination when any change occurs in the video signal. The apparatus further has a detector for detecting a change of the video signals in accordance with a mean value of luminance of the inputted video signals, a corrector for correcting the video signals, and a controller for controlling the correction portion to correct the video signals in accordance with distribution of luminance or hue or saturation of the video signals when the detector detects the change of the video signals.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: March 2, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Kozo Masuda, Yasutaka Tsuru
  • Patent number: 7673112
    Abstract: The system according to the present invention comprises a first storage area for storing a plurality of logical volume data where the attributes on a plurality of logical volumes are recorded respectively, a second storage area for storing allocation destination candidate data where the attributes on an allocation destination candidate selected from one or more allocation destination candidates are recorded, a third storage area for storing one or more history data to indicate a relationship of a logical volume having a certain attribute among the plurality of logical volumes to an allocation destination candidate having a certain attribute among one or more allocation destination candidates, a device refining unit for refining the plurality of logical volume data to one or more logical volume data based on the plurality of logical volume data, allocation destination candidate data, and one or more history data, and a refined result output section for outputting the content of the refined one or more logical
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: March 2, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Shinya Takeuchi, Yasufumi Uchiyama
  • Patent number: 7672051
    Abstract: An optical film 10 has a transparent base film 11 made of polyethylene terephthalate (PET), a prism made of photo-curing resin such as acryl modified epoxy on an incident surface 12 that is one face of the base film 11, and a hologram similarly made of photo-curing resin on an exit surface 13 opposing the incident surface 12. The prism has grooves or ridges each having a substantially triangular cross section to totally reflect incident light so as to bend the light into a direction perpendicular to the exit surface 13. The hologram anisotropically diffuses light exiting from the exit surface 13, to improve brightness.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: March 2, 2010
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Tetsuya Hoshino, Yasushi Sugimoto, Teruo Teshima, Tomo Dobashi
  • Patent number: 7669637
    Abstract: A lost-wax cast impeller for a supercharger having no parting line on a hub surface and a blade surface in each space demarcated by pairs of long blades adjacent to each other and having excellent aerodynamic performance. A method of manufacturing the impeller involves forming a lost form pattern in substantially the same shape as the impeller, forming a mold by eliminating the lost form pattern after the lost form pattern is coated with a refractory, and pouring a molten metal in the mold for casting. In the molding step, lost material is injection-molded in a space demarcated by radially arranging, toward a center shaft, a plurality of slide molds having short blade-shaped bottomed groove parts and space shapes between the pairs of long blades adjacent to each other, and the slide molds are released by moving in the radial direction of the center shaft while rotating.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: March 2, 2010
    Assignees: Hitachi Metals Ltd., Hitachi Metals Precision, Ltd.
    Inventors: Yasuhiro Kubota, Hirokazu Itoh
  • Patent number: 7671502
    Abstract: A rotating electric machine comprises a stator having stator salient poles, three-phases windings would around said stator salient poles, a rotor rotatable held inside the said stator, and permanent magnets inserted into said rotor and positioned opposite to said stator salient poles. The three-phase windings are concentratively wound around each of the stator salient poles, with windings of each phase wound around at more than one stator salient pole. The windings of each phase have a phase difference of voltage between at least one of the windings and the other.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: March 2, 2010
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Fumio Tajima, Yutaka Matsunobe, Shouichi Kawamata, Suetaro Shibukawa, Osamu Koizumi, Keijiro Oda
  • Patent number: 7672799
    Abstract: A defect inspection apparatus includes: stages each mounting an inspecting object on which a circuit pattern having a group of parallel lines is formed, and each running perpendicular or parallel to the group of lines; an illumination optical system which illuminating a surface of the inspecting object with a slit beam being slit light so that a longitudinal direction of the slit beam is substantially perpendicular to the running directions of the stages, and which has a first inclined angle formed by the direction of the group of lines and a projection line, of an optical axis of the slit beam, to the inspecting object; a spatial filter that shields or transmits reflected and scattered light of the inspecting object according to a difference in distribution of orientation; and a detection optical system that detects the reflected and scattered light transmitted through the spatial filter by image sensors.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: March 2, 2010
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Kei Shimura, Minori Noguchi, Masaaki Ito, Kenji Aiko, Shuichi Chikamatsu, Shigeo Otsuki, Shigeru Abe, Masayuki Ochi, Takuaki Sekiguchi, Hiroyuki Yamashita
  • Patent number: 7672173
    Abstract: For each memory block, a predecoder for predecoding an applied address signal, an address latch circuit for latching the output signal of the predecoder, and a decode circuit for decoding an output signal of the address latch circuit and performing a memory cell selecting operation in a corresponding memory block are provided. Propagation delay of latch predecode signals can be made smaller and the margin for the internal read timing can be enlarged. In addition, the internal state of the decoder and memory cell selection circuitry are reset to an initial state when a memory cell is selected and the internal data output circuitry is reset to an initial state in accordance with a state of internal data reading. Thus, a non-volatile semiconductor memory device that can decrease address skew and realize an operation with sufficient margin is provided.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: March 2, 2010
    Assignees: Renesas Technology Corp., Hitachi ULSI Systems Co., Ltd.
    Inventors: Tsukasa Ooishi, Tomohiro Uchiyama, Shinya Miyazaki
  • Patent number: 7670031
    Abstract: A lighting device includes a plurality of self-luminous elements formed on a substrate and emitting different wavelengths of light from each other, a hemispherical lens structure formed on the substrate to cover the self-luminous elements, and a plurality of translucent spherical particles covering a surface of the lens structure. Light emitted from the self-luminous elements passes through the lens structure and enters the translucent spherical particles where its direction is largely inclined to scatter due to a difference in refractive index between the translucent spherical particles and air. Consequently, different wavelengths of light from the self-luminous elements are mixed to produce a desired color of light.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: March 2, 2010
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Yoichi Ogawa, Masataka Sato, Katsusuke Shimazaki, Eiji Koyama, Hiroyuki Tsukamoto, Toshihiro Yamanaka
  • Patent number: 7670558
    Abstract: A chemical analysis apparatus in which a sample to be analyzed and a reagent are placed into a reaction container, and sound waves are irradiated to said reaction container so as to agitate them, wherein said chemical analysis apparatus comprises a piezoelectric element producing said sound waves, and drivers for driving said piezoelectric element, said sound waves being intermittently irradiated into said reaction container.
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: March 2, 2010
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Hajime Katou, Ryo Miyake, Hiroyasu Uchida, Katsuhiro Kambara, Takenori Okusa, Shigenori Watari, Yoichiro Suzuki, Tomonori Mimura, Miki Taki, Akira Inagaki
  • Patent number: 7670007
    Abstract: A projection display is capable of suppressing both the trapezoidal distortion of an enlarged image projected on a screen by oblique projection and aberrations resulting from oblique projection and includes a projection optical system provided with lenses that can be easily manufactured and assembled. The projection optical system for obliquely projecting an image formed by a display device on the screen includes a free curved lens having a rotationally asymmetric free curved surface. The free curved lens has fringing parts having outlines of a shape coinciding with an arc of a circle having the center on the optical axis of the free curved lens.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: March 2, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Takanori Hisada, Hiroki Yoshikawa, Tetsu Ohishi, Koji Hirata, Naoyuki Ogura
  • Patent number: 7672980
    Abstract: A data read apparatus which, when reading data in a data region sequentially, consults information pieces indicative of positions of information pieces concerning files to identify a position of an information piece concerning a file corresponding to a data piece at a reading position, consults an information piece concerning the file at the identified position to calculate an output position in a temporary memory region to which the data is to be outputted, delivers the data read out of an area in the data region to the output position, decides whether files corresponding to outputted data are all present in the temporary memory region and delivers the files to a backup region in a unit of file when the presence of all files is determined.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: March 2, 2010
    Assignee: Hitachi, Ltd.
    Inventor: Yoshitake Sano
  • Patent number: 7671370
    Abstract: Improvement in characteristics of a SELAX-TFT and throughput of ELA crystallization is achieved. When a thin film transistor using pseudo single crystal semiconductor and a thin film transistor using particulate polysilicon semiconductor are formed on a single substrate, the film thickness of an amorphous semiconductor film before crystallization in the pseudo single crystal semiconductor portion is greater than that in the polysilicon semiconductor portion.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: March 2, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Hidekazu Miyake, Toshihiko Itoga, Eiji Oue, Takeshi Noda
  • Patent number: 7670009
    Abstract: In a projection-type image display apparatus, comprising an enlarged projection optical unit, which is configured to project the lights from the light source unit onto the display portion, enlargedly, the enlarged projection optical unit, further comprises: a projection lens for projecting the image on the image display element, enlargedly, and a reflection mirror having a reflection surface made up with a freely curved surface, and the image display element has a display surface larger than the display portion, when a whole body thereof is projected on the display portion, through the enlarged projection optical unit, to be displayed by projection thereof, and the image on the display surface of the image display element is movable, within the display surface of the image display element, so as to project a portion fitting to the display portion, selectively, to be displayed, when projecting it through the enlarged projection optical unit upon the display portion, to be displayed, thereby enabling an install
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: March 2, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Koji Hirata, Masahiko Yatsu
  • Patent number: 7669418
    Abstract: A heat energy supply system and method capable of drastically increasing energy efficiency and energy supply efficiency, as well as a reconstruction method of the heat energy supply system. The heat energy supply system comprises a boiler for heating a heat medium and producing steam including water and other vapors, a heat pump including a steam turbine driven by the steam supplied from the boiler and a heat exchanger for heating the heat medium by employing waste heat or heat obtained from environment, thereby producing the steam at a setting temperature, and a steam supply line for supplying the steam discharged from the steam turbine and the steam heated by the heat exchanger to a heat utilization facility.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: March 2, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Kooichi Chino, Moriaki Tsukamoto, Toshihiko Fukushima, Shigeo Hatamiya
  • Patent number: 7671825
    Abstract: According to one aspect of the present invention, it is possible to sufficiently perform the discharging of charge without lowering the light emitting efficiency of an organic EL device and hence, the device can exhibit the light emitting efficiency higher than a conventional organic EL device and, at the same time, can prevent the degradation of the device. As an organic EL device to which the present invention is applied, on a glass transparent substrate, a transparent electrode, a hole injection layer and a hole transport layer which function as a hole transport function layer, a light emitting layer, an electron transport function layer, and a metal electrode are formed sequentially, and a drive power sources are connected to the transparent electrode and the metal electrode.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: March 2, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Norikazu Uchiyama, Masaaki Okunaka, Masahiro Nishizawa, Hidetsugu Matsukiyo, Yuko Matsumoto
  • Patent number: 7673022
    Abstract: In an information processing apparatus having a function for exploiting higher performance than a single server module by constituting an SMP by combining a plurality of server modules, a user is inhibited from illegally constituting an SMP construction that exceeds license information. When a partition is constituted by a construction against the SMP license information, a slot number representing the number of server modules belonging to a partition and mounted to a chassis and the number of server modules in the same partition are checked and the SMP construction is inhibited when they do not fall within the range of the slot number and the number of server modules in the license information.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: March 2, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Takuhiro Kawaji, Yoshinori Wakai, Nakaba Osano
  • Patent number: 7672090
    Abstract: A magnetoresistive sensor having a hard magnetic pinning layer with an engineered magnetic anisotropy in a direction substantially perpendicular to the medium facing surface. The hard magnetic pinning layer may be constructed of CoPt, CoPtCr, or some other magnetic material and is deposited over an underlayer that has been ion beam etched. The ion beam etch has been performed at an angle with respect to normal in order to induce anisotropic roughness for example in form of oriented ripples or facets oriented along a direction parallel to the medium facing surface. The anisotropic roughness induces a strong uniaxial magnetic anisotropy substantially perpendicular to the medium facing surface in the hard magnetic pinning layer deposited there over.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: March 2, 2010
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Matthew Joseph Carey, Jeffrey Robinson Childress, Eric Edward Fullerton, Stefan Maat