Patents by Inventor Kazuhiko Ikeuchi

Kazuhiko Ikeuchi 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: 11064288
    Abstract: A horn for speakers includes a horn body including: a first opening located in a first end portion and having a circular shape; a second opening located in a second end portion and having a shape different from the circular shape; and a sound path connecting the first opening and the second opening. In a cross section including a central axis of the horn body, an inner surface of the sound path flares out in a quartic curve from the first opening toward the second opening. A length (L2) from the first end portion to the second end portion of the horn body is at least 0.8 times as large as a radius (R) of the first opening.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: July 13, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuhiko Ikeuchi, Kazuya Asahina
  • Publication number: 20200413185
    Abstract: A horn for speakers includes a horn body including: a first opening located in a first end portion and having a circular shape; a second opening located in a second end portion and having a shape different from the circular shape; and a sound path connecting the first opening and the second opening. In a cross section including a central axis of the horn body, an inner surface of the sound path flares out in a quartic curve from the first opening toward the second opening. A length (L2) from the first end portion to the second end portion of the horn body is at least 0.8 times as large as a radius (R) of the first opening.
    Type: Application
    Filed: September 6, 2018
    Publication date: December 31, 2020
    Inventors: Kazuhiko IKEUCHI, Kazuya ASAHINA
  • Patent number: 10674271
    Abstract: A flat speaker includes a diaphragm having a flat plate shape, a drive unit that is attached to a back surface of the diaphragm and vibrates the diaphragm, a fixing member that fixes an outer circumference of the diaphragm in a circumferential direction, a first support member that is disposed on an inner side in a radial direction of the fixing member, supports the back surface of the diaphragm in the circumferential direction, and has a value of hardness smaller than a value of hardness of the fixing member and/or a value of internal loss larger than a value of internal loss of the fixing member, and a second support member that is disposed on an inner side in the radial direction of the first support member, supports the back surface of the diaphragm in the circumferential direction, and has a value of hardness smaller than the value of hardness of the first support member and/or a value of internal loss larger than the value of internal loss of the first support member.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: June 2, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Kazuhiko Ikeuchi
  • Patent number: 10608670
    Abstract: A control device is configured to receive a first write request of first data, calculate a first parity of the first data, store the first data and the first parity into a storage region so that the first data is stored redundantly, identify a certain area which has a possibility that a write process to the certain area is requested after a read process from the certain area is requested, receive a read request of the first data stored in the certain area, read the first data and the first parity, and store the first data and the first parity into a memory, receive a second write request of a second data, calculate a second parity based on the second data, the first data stored in the memory and the first parity stored in the memory, and store the second data and the second parity into the storage region.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: March 31, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Kazuhiko Ikeuchi, Chikashi Maeda, Yukari Tsuchiyama, Guangyu Zhou
  • Publication number: 20190238986
    Abstract: A flat speaker includes a diaphragm having a flat plate shape, a drive unit that is attached to a back surface of the diaphragm and vibrates the diaphragm, a fixing member that fixes an outer circumference of the diaphragm in a circumferential direction, a first support member that is disposed on an inner side in a radial direction of the fixing member, supports the back surface of the diaphragm in the circumferential direction, and has a value of hardness smaller than a value of hardness of the fixing member and/or a value of internal loss larger than a value of internal loss of the fixing member, and a second support member that is disposed on an inner side in the radial direction of the first support member, supports the back surface of the diaphragm in the circumferential direction, and has a value of hardness smaller than the value of hardness of the first support member and/or a value of internal loss larger than the value of internal loss of the first support member.
    Type: Application
    Filed: October 11, 2017
    Publication date: August 1, 2019
    Inventor: KAZUHIKO IKEUCHI
  • Publication number: 20190114258
    Abstract: A storage control apparatus that controls a plurality of storage devices, each of which includes a plurality of storage groups, the storage control apparatus includes a memory, a processor coupled to the memory and the processor configured to detect a first storage device from the plurality of storage devices, the first storage device having an area on which garbage collection is to be executed, identify a first storage group from the plurality of storage groups, the first storage group including the first storage device, prohibit write access to the plurality of storage devices included in the identified first storage group, and instruct the first storage device to execute the garbage collection.
    Type: Application
    Filed: October 11, 2018
    Publication date: April 18, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Yukari Tsuchiyama, Chikashi Maeda, Guangyu ZHOU, Kazuhiko IKEUCHI
  • Publication number: 20190081643
    Abstract: A control device is configured to receive a first write request of first data, calculate a first parity of the first data, store the first data and the first parity into a storage region so that the first data is stored redundantly, identify a certain area which has a possibility that a write process to the certain area is requested after a read process from the certain area is requested, receive a read request of the first data stored in the certain area, read the first data and the first parity, and store the first data and the first parity into a memory, receive a second write request of a second data, calculate a second parity based on the second data, the first data stored in the memory and the first parity stored in the memory, and store the second data and the second parity into the storage region.
    Type: Application
    Filed: September 4, 2018
    Publication date: March 14, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Kazuhiko IKEUCHI, Chikashi Maeda, Yukari Tsuchiyama, Guangyu ZHOU
  • Patent number: 9977624
    Abstract: In a storage control apparatus, a control unit determines whether prefetching data on a first data amount basis from a plurality of storage devices to a storage unit causes an imbalance in the numbers of commands issued to the storage devices. When determining that the prefetching causes the imbalance, the control unit prefetches the data on a second data amount basis such as to balance the numbers of commands issued to the storage devices. With this approach, the storage control apparatus creates a different imbalance of the number of read commands issued for each execution of prefetch staging, so as to prevent a fixed imbalance in which more read commands are always issued to a specific storage device.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: May 22, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Takeshi Watanabe, Kazuhiko Ikeuchi, Chikashi Maeda, Kazuhiro Urata, Yukari Tsuchiyama, Guangyu Zhou
  • Patent number: 9841900
    Abstract: A storage control apparatus, that controls a storage apparatus that includes a storage drive in which a plurality of logical volumes are set, includes a storage unit that stores load information for each of the plurality of logical volumes, and a control unit that determines to-be-rebuilt volumes, which are targets to be rebuilt, from the plurality of logical volumes, sequentially selects a logical volumes for which a volume-specific taken time is estimated, determines, for each selected logical volume, a volume-specific start time at which a rebuild will be started, estimates, by using the volume-specific start time and the load information about the selected logical volume, the volume-specific taken time for rebuilding the selected logical volume, and totals the volume-specific taken time estimated for each selected logical volume to calculate a total taken time taken for rebuilding the to-be-rebuilt volumes.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: December 12, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Kazuhiro Urata, Kazuhiko Ikeuchi, Chikashi Maeda, Yukari Tsuchiyama, Takeshi Watanabe, Guangyu Zhou
  • Patent number: 9529721
    Abstract: A control device that controls a reading process of information stored in a unit storage area under control of the control device and a unit storage area under control of a different control device in a distributed manner, the control device includes a processor. The processor executes a procedure including determining whether or not the reading process is a sequential reading process that reads information stored in a unit storage area under control of the control device in an order of logical addresses and whether or not a reading target area of the sequential reading process includes a last address in the unit storage area, and reporting to the different control device control information related to a sequential reading process including the last address determined by the first determination unit.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: December 27, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Takeshi Watanabe, Kazuhiko Ikeuchi, Chikashi Maeda, Kazuhiro Urata, Yukari Tsuchiyama, Norihide Kubota, Kenji Kobayashi, Ryota Tsukahara
  • Patent number: 9524213
    Abstract: A storage control apparatus starts, in a group of storage apparatuses that store constituent data that constitute redundant data in a distributed manner in units of a stripe, in regard to respective stripes of a plurality of stripes obtained from a group of target storage apparatuses excluding one of the storage apparatuses, a plurality of rebuilding processes for restoring the constituent data; decides, for each rebuilding process, a stripe for which the rebuilding process is to be performed next, according to access loads on the respective storage apparatuses of the group of target storage apparatuses; and obtains, for each rebuilding process, constituent data corresponding to the decided stripe from the group of target storage apparatuses and executing the rebuilding process, and executes the rebuilding process, to restore constituent data stored in the excluded storage apparatus from the obtained constituent data.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: December 20, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Takeshi Watanabe, Kazuhiko Ikeuchi, Chikashi Maeda, Kazuhiro Urata, Yukari Tsuchiyama, Guangyu Zhou
  • Patent number: 9519542
    Abstract: A storage control apparatus includes a controller to, when more storage devices, among a plurality of storage devices across which a plurality of information areas storing information representing redundant data and one or more spare areas are distributed, than the number of the spare areas fail, perform a rebuild process of information stored in a plurality of information areas of a failed first storage device included in the plurality of combinations of the plurality of information areas and the one or more spare areas, the rebuild process including restoring information corresponding to one information area of the failed first storage device included in one combination among the plurality of combinations, and determining a write destination storage device to which the restored information is to be written in accordance with the number of times information is read from a non-failed second storage device.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: December 13, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Guangyu Zhou, Takeshi Watanabe, Kazuhiko Ikeuchi, Chikashi Maeda, Yukari Tsuchiyama, Kazuhiro Urata
  • Patent number: 9501406
    Abstract: A storage control apparatus is communicatively connected to a storage device. The storage device includes a plurality of SSDs. The storage control apparatus includes a processing request controller and a device load detector. The device load detector detects an overload of an SSD by detecting a processing delay of the SSD. When the device load detector has detected an overload of an SSD, the processing request controller suppresses issuance of a request to process write-back with respect to a group by delaying issuance of the write-back.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: November 22, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yukari Tsuchiyama, Kazuhiko Ikeuchi, Koutarou Nimura, Akihito Kobayashi, Chikashi Maeda, Kazuhiro Urata, Takeshi Watanabe, Guangyu Zhou
  • Patent number: 9501362
    Abstract: A CM 10 includes an unmount detector 142 and a mount detector 144 that monitor unmount and mount of each disk 21 of a RAID configuration, a write request manager 143 that manages a write request for writing data to a disk 21 that is unmounted, a consistency determination unit 145 that, when mount of a disk 21 of the RAID configuration is detected, makes a determination on consistency of the data of the disk 21 in which mount is detected on the basis of the managed write request, and a RAID incorporating unit that, when it is determined that the data lacks consistency, performs processing for recovering data expected to be written by the write request issued to the disk 21 in which mount is detected while the disk 21 is unmounted and incorporates the disk 21 in an original RAID configuration.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: November 22, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Yukari Tsuchiyama, Hidejirou Daikokuya, Kazuhiko Ikeuchi, Chikashi Maeda, Kazuhiro Urata, Takeshi Watanabe, Norihide Kubota, Kenji Kobayashi, Ryota Tsukahara
  • Publication number: 20160291901
    Abstract: In a storage control apparatus, a control unit determines whether prefetching data on a first data amount basis from a plurality of storage devices to a storage unit causes an imbalance in the numbers of commands issued to the storage devices. When determining that the prefetching causes the imbalance, the control unit prefetches the data on a second data amount basis such as to balance the numbers of commands issued to the storage devices. With this approach, the storage control apparatus creates a different imbalance of the number of read commands issued for each execution of prefetch staging, so as to prevent a fixed imbalance in which more read commands are always issued to a specific storage device.
    Type: Application
    Filed: February 19, 2016
    Publication date: October 6, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Takeshi WATANABE, Kazuhiko IKEUCHI, Chikashi Maeda, Kazuhiro URATA, Yukari Tsuchiyama, Guangyu ZHOU
  • Publication number: 20160259598
    Abstract: A control apparatus, that controls allocation of data in a logical volume so that the data is allocated so as to span a plurality of RAID groups, according to a predetermined allocation pattern, includes a storage unit that stores correspondence information that includes at least one changing condition under which an allocation pattern for the data is changed and a new allocation pattern; and a control unit that identifies an access trend for each of the plurality of RAID groups, decides whether the logical volume satisfies the at least one changing condition, according to the correspondence information and the identified access trend, and reallocates, if the changing condition is satisfied, the data included in the logical volume according to the new allocation pattern corresponding to that changing condition.
    Type: Application
    Filed: February 11, 2016
    Publication date: September 8, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Kazuhiko IKEUCHI, Chikashi Maeda, Kazuhiro Urata, Yukari Tsuchiyama, Takeshi Watanabe, Guangyu Zhou
  • Publication number: 20160259580
    Abstract: A storage control device includes a control unit that calculates a stripe depth and a size of padding data, when writing target data is distributed and written to respective data storages of a storage device with a RAID configuration, based on a size of the writing target data and a number of the data storages in response to a writing request to a volume on the storage device, and writes the writing target data based on the calculated stripe depth and the calculated size of the padding data.
    Type: Application
    Filed: February 9, 2016
    Publication date: September 8, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Chikashi Maeda, Kazuhiko IKEUCHI, Kazuhiro URATA, Yukari Tsuchiyama, Takeshi WATANABE, Guangyu ZHOU
  • Publication number: 20160232104
    Abstract: A system that sets a logical volume in a first physical address region of a storage device including a plurality of memory areas, receives a write request to write data to a first logical address of the logical volume, calculates a difference between a first physical address corresponding to the first logical address and a head physical address of a first memory area of the plurality of memory areas, changes, based on the calculated difference, a first physical address region of the logical volume in the storage device to a second physical address region of the storage device, and writes the data to the first logical address of the logical volume set in the second physical address region of the storage device.
    Type: Application
    Filed: February 8, 2016
    Publication date: August 11, 2016
    Inventors: Kazuhiko IKEUCHI, Chikashi Maeda, Kazuhiro URATA, Yukari Tsuchiyama, Takeshi WATANABE, Guangyu ZHOU
  • Patent number: 9395938
    Abstract: A storage control device includes a storage unit and a processor. The storage unit is configured to store therein a first score calculated for a first storage device. The processor is configured to add, upon detecting an event occurred in the first storage device, points corresponding to the event to the first score. The processor is configured to determine upon the addition, based on the first score and a second score, whether a sign of failure of the first storage device is detected. The second score is calculated for a first redundant unit of storage devices including the first storage device.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: July 19, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Ryota Tsukahara, Norihide Kubota, Atsushi Igashira, Kenji Kobayashi, Hidejirou Daikokuya, Kazuhiko Ikeuchi, Chikashi Maeda, Takeshi Watanabe
  • Publication number: 20160062658
    Abstract: A storage control apparatus, that controls a storage apparatus that includes a storage drive in which a plurality of logical volumes are set, includes a storage unit that stores load information for each of the plurality of logical volumes, and a control unit that determines to-be-rebuilt volumes, which are targets to be rebuilt, from the plurality of logical volumes, sequentially selects a logical volumes for which a volume-specific taken time is estimated, determines, for each selected logical volume, a volume-specific start time at which a rebuild will be started, estimates, by using the volume-specific start time and the load information about the selected logical volume, the volume-specific taken time for rebuilding the selected logical volume, and totals the volume-specific taken time estimated for each selected logical volume to calculate a total taken time taken for rebuilding the to-be-rebuilt volumes.
    Type: Application
    Filed: July 23, 2015
    Publication date: March 3, 2016
    Applicant: Fujitsu Limited
    Inventors: Kazuhiro URATA, Kazuhiko Ikeuchi, Chikashi Maeda, Yukari Tsuchiyama, Takeshi Watanabe, Guangyu Zhou