Patents Assigned to Hitachi, Ltd.
  • Patent number: 7981653
    Abstract: Disclosed is a modified hyperthermophilic DNA ligase having improved DNA binding ability and reactivity. The modified hyperthermophilic DNA ligase has an amino acid sequence corresponding to the amino acid sequence of a heat-resistant DNA ligase derived from a thermophilic bacterium, a hyperthermophilic bacterium, a thermophilic archaebacterium, or a hyperthermophilic archaebacterium, except with at least two of the charged amino acids in the C-terminal helix region each being substituted by alanine, threonine, or serine residues.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Hirokazu Nishida, Maiko Tanabe
  • Patent number: 7982537
    Abstract: Disclosed herewith is a circuit system for improving a slew rate while reducing the power consumption in an operational amplifier that requires a comparatively high supply voltage (e.g., 5 V or upper) operation. The operational amplifier includes level shift circuits, differential pairs whose source connected serially, current voltage conversion circuit and output stage. The level shift circuits convert a differential input signal level and output to differential pairs. Combination of level shift circuit and differential pairs realize input signal difference detection and driving current control in the common circuit.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihiro Hayashi, Masaki Yoshinaga, Takashi Matsumoto
  • Patent number: 7980818
    Abstract: Provided is a member having an internal cooling passage 7c formed therein and having opposed partition walls 6b, 6c between which a medium flows to cool a parent material, including a first heat transfer rib 25a which extends from almost the center between the opposed partition walls 6b, 6c to one partition wall 6c and slants in a downstream direction of the medium, and a second heat transfer rib 25b which extends from almost the center between the opposed partition walls 6b, 6c to the other partition wall 6b and slants in the downstream direction of the medium, wherein a slit 70a or 70b which passes through between an upstream side of the cooling passage 7c and a downstream side thereof is formed in the first heat transfer rib 70a or the second heat transfer rib 70b.
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Nobuaki Kizuka, Yasuhiro Horiuchi, Shinya Marushima, Hidetoshi Kuroki
  • Patent number: 7983267
    Abstract: A link aggregation function and maintenance function by MPLS OAM. Identical entry information is stored in plural circuits IF which perform a LA setting. In this way, multiplexing to the same LSP is possible even with different IF. The first network IF is assumed to be OAM ACT, and the second network IF is set to OAM SBY (SBY). OAM frame insertion is performed only by an OAM ACT port. In this way, in an opposite MPLS transmission apparatus, it is possible to prevent CV frame reception above a specified number of frames. Further, a switch forwarding table is set to forward frames from the network side to the first network IF of OAM ACT. The second network IF which was set to OAM SBY does not perform fault detection by CV reception. In this way, incorrect detection of faults due to non-reception of OAM can be prevented.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Masayuki Takase, Hideki Endo, Takayuki Kanno, Nobuyuki Yamamoto
  • Patent number: 7983283
    Abstract: A packet routing apparatus has a plurality of routing units, connected by a first connecting mechanism. The plurality of routing units comprise a first routing unit, connected to at least one port, and a second routing unit, connected to an extended function processor. The first routing unit transmits a packet, received from the port, to another first routing unit and/or a second routing unit. The second routing unit transmits the packet, received from the first connecting mechanism, to the extended function processor.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Shigeki Yoshino, Hidemitsu Higuchi, Naoya Ikeda, Yoshitaka Sainomoto, Yukihide Inagaki
  • Patent number: 7980716
    Abstract: A technique for a display device using a display panel with Lambert light distribution, such as a plasma display panel, which displays a bright image with less contrast deterioration. This device has a front sheet which is integrally or separately located in front of the display panel. The front sheet includes light guides which extend in the horizontal direction and have a virtually convex cross section in the vertical direction with their apexes on the light exit side. A light reflection layer and a light-absorbing layer are sequentially stacked on the lateral sides of the light guides.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Koji Hirata, Kei Adachi
  • Patent number: 7983109
    Abstract: A phase change memory capable of highly reliable operations is provided. A semiconductor device has a memory array having a structure in which memory cells are stacked including memory layers using a chalcogenide material and diodes, and initialization conditions and write conditions are changed according to the layer in which a selected memory cell is positioned. The initialization conditions and write conditions (herein, reset conditions) are changed according to the operation by selecting a current mirror circuit according to the operation and by a control mechanism of a reset current in a voltage select circuit and the current mirror circuit.
    Type: Grant
    Filed: September 25, 2010
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Satoru Hanzawa, Hitoshi Kume
  • Patent number: 7982198
    Abstract: It is an object of the present invention to provide a charged particle beam extraction method and particle beam irradiation system that make it possible to exercise intensity control over an extracted ion beam while a simple device configuration is employed. To accomplish the above object, there is provided a particle beam irradiation system comprising: a synchrotron for accelerating and extracting an charged particle beam; an irradiation apparatus for extracting the charged particle beam that is extracted from the synchrotron; first beam intensity modulation means for controlling the beam intensity of the charged particle beam extracted from the synchrotron during an extraction control period of an operation cycle of the synchrotron; and second beam intensity modulation means for controlling the beam intensity during each of a plurality of irradiation periods contained in the extraction control period of the operation cycle.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Hideaki Nishiuchi, Kazuyoshi Saito
  • Patent number: 7984026
    Abstract: The present invention relates to a storage system including a de-duplicate function and a full-text search function or the like, and reduces an amount of index information about full-test search to save storage resource. In this system, a storage apparatus includes a processing unit for de-duplicating a plurality of files having the same content regarding a file group of data inputted/outputted through a host apparatus. A full-text search processing server performs a full-text search processing to the file group and includes a processing unit for causing the full-text search processing to correspond to de-duplicate. An index information creation processing performed to a plurality of target files having the same content by the full-text search processing unit is inhibited according to a status of de-duplicate to the file group by the processing unit. Thereby, the amount of index information can be reduced.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventor: Takayoshi Iitsuka
  • Patent number: 7982347
    Abstract: An electric power steering apparatus including: a power system board which is received in a housing, which supports a component of a power supply circuit to supply power to a motor; a control system board which is received in the housing, which supports a component of a control circuit to control the motor, and which extends radially with respect to an axis of the motor output shaft; a rotation sensor which is provided in the housing, which is located, in an axial direction of a motor output shaft, between the motor and the control system board, and which is arranged to sense a rotational position of the motor output shaft; and an output terminal which is provided with the rotation sensor, which is connected electrically with the control system board to supply a rotational position signal of the rotation sensor to the control circuit.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kohtaro Shiino, Makoto Kimura, Toshiro Yoda, Haruhiko Fujita, Yoshimori Kondo, Yoshiki Sakamoto
  • Patent number: 7984260
    Abstract: A plurality of global LDEV managed by a plurality of controller modules are provided above local LDEV under the control of each controller module. Each global LDEV is correlated to any of the plurality of local LDEV. The controller modules judge whether or not a local LDEV correlated to a global LDEV specified by an I/O request received from a host device or a first other controller module is a management target itself, and if the result of that judgment is affirmative, the controller modules access the local LDEV correlated to the specified global LDEV, while if the result of the judgment is negative, the controller modules transfer the received I/O request to a second other controller module.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Noboru Morishita, Akira Deguchi, Ai Satoyama, Hisaharu Takeuchi
  • Patent number: 7983044
    Abstract: An inverter apparatus includes a liquid path in which cooling water flows, and in which the cooling water performs cooling at a cooling part located directly underneath the power circuit part of the inverter apparatus. The liquid path includes a first partial structure part formed between a feed pipe and the cooling part, and having a liquid path cross-sectional profile that is gradually reduced in the short-side direction of the cooling part and that is gradually enlarged in the long-side direction thereof; and a second partial structure part formed between the cooling part and a drain pipe, and having a liquid path cross-sectional profile that is gradually enlarged from the short-side of the cooling part and that is gradually reduced from the long-side thereof.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Takayoshi Nakamura, Akihiro Tamba, Ryuichi Saito, Atsuo Nishihara
  • Patent number: 7983837
    Abstract: A navi-server which is provided with information from a traffic information providing center, and presents and provides information made on the information to a terminal is characterized by being equipped with a first storage means storing the information provided from the traffic information providing center; a traffic jam statistical making means which makes traffic jam statistical information including traffic jam information in a predetermined point and a predetermined zone as well as a reliability of the traffic jam information, based on information stored in the first storage means; and a second storage means storing information made by the traffic jam statistical making means, wherein the navi-server presents and provides the information stored in the second storage means to the terminal, based on a request of the terminal and at a predetermined timing.
    Type: Grant
    Filed: January 9, 2004
    Date of Patent: July 19, 2011
    Assignees: Hitachi, Ltd., Xanavi Informatics Corporation
    Inventors: Kenichiro Yamane, Junsuke Fujiwara, Yoshinori Endo, Kimiyoshi Machii, Shigeru Matsuo, Hideo Hiroshige, Takumi Fushiki, Takayoshi Yokota
  • Patent number: 7983281
    Abstract: A method serves to compose a VPN (Virtual Private Network) over a plurality of networks, each of which is managed by a different Internet Service Provider (ISP). When a packet with a first capsule header used for composing a VPN in a first ISP network is transmitted to a second ISP network, a route for outputting the packet to the second ISP network is determined based on the information both in the capsule header and in the IP header. In addition, a second capsule header used for composing a VPN in the second ISP network is determined based on the above information.
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Kenichi Sakamoto, Kazuyoshi Hoshino, Koji Wakayama, Shiro Tanabe, Noboru Endo
  • Patent number: 7983227
    Abstract: In the conventional network using the PPP stipulated by RFC1661, the LCP phase to establish an LCP link, the authentication phase, and the NCP phase such as address assignment processing of the NCP are sequentially conducted each time the line connection is performed, and hence the connection takes a certain period of time. Particular, in the case of the mobile communication, there is often performed operation in which connection and disconnection are frequently conducted in a short period of time, and hence when the operation up to the connection takes a long period of time, the usability is deteriorated. Therefore, a need exists for a configuration of an apparatus and a communication method to reduce the connection time.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Naruhito Nakahara, Hitomi Teraoka
  • Patent number: 7982804
    Abstract: Image quality adjustment of an inputted image signal is performed with higher accuracy to display a more preferable image to the user. An attribute information determining unit obtains first attribute information indicating the format of the inputted image signal and second attribute information indicating transmission characteristics of the image signal. An image quality adjustment value calculating unit calculates optimal image quality adjustment values for the image signal from the obtained first and second attribute information. An image processing unit adjusts the image quality of the image signal based on the optimal image quality adjustment values and then outputs the image to an image display. The second attribute information includes the bit rate, resolution, and frame rate of the image signal.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Takehiro Uzawa, Masato Oshikiri, Haruki Takata, Hidenori Takata
  • Patent number: 7982266
    Abstract: A dielectrically isolated semiconductor device of high reliability is provided by realizing a fine and deep element isolating region which can prevent dislocation of an oxide film as an insulation layer by oxidation-induced stress. The dielectrically isolated semiconductor device includes an SOI substrate supporting an active element layer deeper than an expanded distance of a depletion layer subjected to the highest voltage applied to the device, and an element isolating region which encloses the active element layer. The element isolating region contains a deep trench which comes into contact with the insulation layer, and which is filled with n heavily doped layers on both side walls, second insulation films each adjacent to the n heavily doped layer and a polycrystalline semiconductor layer formed between the second insulation films.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Atsuo Watanabe, Mitsutoshi Honda, Norio Ishitsuka, Masahiro Ito, Toshihito Tabata, Shinichi Kurita, Hidekazu Kamioka
  • Patent number: 7984339
    Abstract: A digital data recording/reproducing method includes the steps of: interleaving data on a PI code for each PI code of a 208-row ECC block; and converting a short burst error into random errors by dispersing errors on the PI codes. Moreover, the digital data recording/reproducing method increases correction capability against several bytes to several tens bytes of errors generated at random without changing burst error correction length by performing this processing for respective PI codes by using interleave rules that are different as much as possible from one another.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Taku Hoshizawa, Shigeki Taira, Osamu Kawamae
  • Patent number: 7982958
    Abstract: A projection type image display apparatus is provided which includes a housing to hold an optical system including multi-lenses, a polarized-light conversion element and the color separation portion. The housing operates to provide an optical path between a light source, located outside the housing, and penetration-type image display elements and an optical synthesizing portion also located outside of the housing.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Koji Hirata, Masahiko Yatsu
  • Patent number: 7980075
    Abstract: A reservoir capable of shortening a time period required to fill a brake system and a clutch system with a fluid with vacuuming in a case where the reservoir has a brake reservoir chamber to be connected to a brake master cylinder of the brake system and a clutch reservoir chamber to be connected to a clutch master cylinder of the clutch system. The reservoir (12) includes a brake reservoir chamber (28) and an inlet port for injecting the brake reservoir chamber (28) with a fluid from outside. The reservoir further includes a clutch reservoir chamber (29) separated from the brake reservoir chamber (28), and a communication passage (37) providing communication between the inlet port and the brake reservoir chamber (28). The communication passage is branched so as to communicate with the clutch reservoir chamber (29).
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventor: Shoichi Sato