Patents by Inventor Daisuke Isobe
Daisuke Isobe 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).
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Publication number: 20230336173Abstract: A semiconductor device, including: a semiconductor element configured to generate an output current that varies with a change in a temperature of the semiconductor element; a temperature detection circuit that detects the temperature and outputs a temperature detection signal based on the detected temperature; and a correction circuit that causes the output current of the semiconductor element to change based on the temperature detection signal.Type: ApplicationFiled: March 30, 2023Publication date: October 19, 2023Applicant: FUJI ELECTRIC CO., LTD.Inventor: Daisuke ISOBE
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Publication number: 20220216863Abstract: Upon an input of an input signal that instructs to turn on a power semiconductor element, a pulse generation circuit generates a pulse. Upon reception of the pulse, a gated latch circuit holds an overcurrent detection state of an overcurrent detection circuit. In response to the input of the input signal and an overcurrent situation having been detected, an overcurrent mode switching circuit outputs an inverted or non-inverted oscillation signal, which is obtained by inverting or not inverting an oscillation signal generated by an oscillation signal generation circuit depending on the overcurrent situation being detected before or after the input of the input signal, and also outputs an inverted oscillation signal obtained by inverting the oscillation signal. A timing determination circuit periodically turns on the power semiconductor element based on the inverted oscillation signal and frequency divided signals obtained by frequency dividing the inverted or non-inverted oscillation signal.Type: ApplicationFiled: March 25, 2022Publication date: July 7, 2022Applicant: FUJI ELECTRIC CO., LTD.Inventor: Daisuke ISOBE
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Patent number: 9342521Abstract: Provided are a storage system, a storage controller and a data compression method that will not deteriorate the performance of a storage system by adjusting the compression processing time required for compressing data. This storage controller includes a statistical information management unit for managing a throughput value decided based on statistical information of previously compressed file data as a system performance value, a mode setting unit for setting a compression mode of either a system performance priority mode that terminates compression of the file data and gives priority to system performance or a compression priority mode that gives priority to compression of the file data based on a comparison between a system performance target value preset as a target value and the system performance value, and a compression controller for compressing the file data based on the compression mode set with the mode setting unit.Type: GrantFiled: May 24, 2011Date of Patent: May 17, 2016Assignee: HITACHI, LTD.Inventor: Daisuke Isobe
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Publication number: 20160096925Abstract: A cover member includes a base material having a film shape and containing an amorphous aromatic polyamide. Further, it is preferred that the aromatic polyamide contains a carboxyl group. Furthermore, it is preferred that the aromatic polyamide contains a rigid structure in an amount of 85 mol % or more. Moreover, it is preferred that a tensile elastic modulus of the base material is 4 GPa or more. This makes it possible to provide a cover member having a good flatness keeping property and excellent long-term durability, and an electronic device provided with such a cover member and having excellent reliability.Type: ApplicationFiled: October 2, 2015Publication date: April 7, 2016Applicants: AKRON POLYMER SYSTEMS INC., SUMITOMO BAKELITE COMPANY LIMITEDInventors: Limin Sun, Dong Zhang, Frank W. Harris, Jun Okada, Toshihiko Katayama, Ritsuya Kawasaki, Hideo Umeda, Daisuke Isobe
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Patent number: 8161221Abstract: It is an object to prevent a processing speed of the storage system provided with a function for detecting a write completion of data from being reduced. A controller module is provided with at least one processor module, at least one storage resource, and at least one transfer control module connected to the processor module and the storage resource. The transfer control module is provided with a receiver and a transmitter. The receiver receives a write packet from the processor module, includes a specific code in the write packet, and then transmits the write packet. In the case in which the transmitter receives a write packet and the received write packet includes the specific code, the transmitter writes targeted data in the write packet to the storage resource to be written, generates a response packet that is a response indicating a completion of a write, and transmits the generated response packet.Type: GrantFiled: November 25, 2008Date of Patent: April 17, 2012Assignee: Hitachi, Ltd.Inventors: Suguru Shimotaya, Susumu Tsuruta, Daisuke Isobe
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Publication number: 20110225131Abstract: Provided are a storage system, a storage controller and a data compression method that will not deteriorate the performance of a storage system by adjusting the compression processing time required for compressing data. This storage controller includes a statistical information management unit for managing a throughput value decided based on statistical information of previously compressed file data as a system performance value, a mode setting unit for setting a compression mode of either a system performance priority mode that terminates compression of the file data and gives priority to system performance or a compression priority mode that gives priority to compression of the file data based on a comparison between a system performance target value preset as a target value and the system performance value, and a compression controller for compressing the file data based on the compression mode set with the mode setting unit.Type: ApplicationFiled: May 24, 2011Publication date: September 15, 2011Applicant: HITACHI, LTD.Inventor: Daisuke ISOBE
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Publication number: 20110153884Abstract: It is an object to prevent a processing speed of the storage system provided with a function for detecting a write completion of data from being reduced. A controller module is provided with at least one processor module, at least one storage resource, and at least one transfer control module connected to the processor module and the storage resource. The transfer control module is provided with a receiver and a transmitter. The receiver receives a write packet from the processor module, includes a specific code in the write packet, and then transmits the write packet. In the case in which the transmitter receives a write packet and the received write packet includes the specific code, the transmitter writes targeted data in the write packet to the storage resource to be written, generates a response packet that is a response indicating a completion of a write, and transmits the generated response packet.Type: ApplicationFiled: November 25, 2008Publication date: June 23, 2011Applicant: Hitachi Ltd.Inventors: Suguru Shimotaya, Susumu Tsuruta, Daisuke Isobe
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Patent number: 7966296Abstract: Provided are a storage system, a storage controller and a data compression method that will not deteriorate the performance of a storage system by adjusting the compression processing time required for compressing data. This storage controller includes a statistical information management unit for managing a throughput value decided based on statistical information of previously compressed file data as a system performance value, a mode setting unit for setting a compression mode of either a system performance priority mode that terminates compression of the file data and gives priority to system performance or a compression priority mode that gives priority to compression of the file data based on a comparison between a system performance target value preset as a target value and the system performance value, and a compression controller for compressing the file data based on the compression mode set with the mode setting unit.Type: GrantFiled: January 31, 2008Date of Patent: June 21, 2011Assignee: Hitachi, Ltd.Inventor: Daisuke Isobe
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Patent number: 7953904Abstract: A storage control apparatus capable of reducing a power consumption in network port units, including a host communication control unit 10 which includes a plurality of network ports 18 and which controls communications with a host computer 2 that is connectable through the network ports, a storage-device communication control unit 16 which controls communications with a plurality of storage devices, a plurality of DMA portions 111 by which data to be transmitted/received between the host computer and the storage devices are transferred between the host communication control unit 10 and the storage-device communication control unit 16, a plurality of cache memories 12 in which the data to be transferred by the DMA portions 111 are temporarily stored, and a power saving control portion 110 which stops the DMA portion 111 and the cache memory 12 that are previously associated with one network port, on the basis of a connection situation of the pertinent network port with the host computer and a data rate to be iType: GrantFiled: October 17, 2008Date of Patent: May 31, 2011Assignee: Hitachi, Ltd.Inventors: Masateru Hemmi, Susumu Tsuruta, Daisuke Isobe
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Publication number: 20100057948Abstract: A storage control apparatus capable of reducing a power consumption in network port units, including a host communication control unit 10 which includes a plurality of network ports 18 and which controls communications with a host computer 2 that is connectable through the network ports, a storage-device communication control unit 16 which controls communications with a plurality of storage devices, a plurality of DMA portions 111 by which data to be transmitted/received between the host computer and the storage devices are transferred between the host communication control unit 10 and the storage-device communication control unit 16, a plurality of cache memories 12 in which the data to be transferred by the DMA portions 111 are temporarily stored, and a power saving control portion 110 which stops the DMA portion 111 and the cache memory 12 that are previously associated with one network port, on the basis of a connection situation of the pertinent network port with the host computer and a data rate to be iType: ApplicationFiled: October 17, 2008Publication date: March 4, 2010Inventors: Masateru Hemmi, Susumu Tsuruta, Daisuke Isobe
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Publication number: 20080301164Abstract: Provided are a storage system, a storage controller and a data compression method that will not deteriorate the performance of a storage system by adjusting the compression processing time required for compressing data. This storage controller includes a statistical information management unit for managing a throughput value decided based on statistical information of previously compressed file data as a system performance value, a mode setting unit for setting a compression mode of either a system performance priority mode that terminates compression of the file data and gives priority to system performance or a compression priority mode that gives priority to compression of the file data based on a comparison between a system performance target value preset as a target value and the system performance value, and a compression controller for compressing the file data based on the compression mode set with the mode setting unit.Type: ApplicationFiled: January 31, 2008Publication date: December 4, 2008Applicant: HITACHI, LTD.Inventor: Daisuke ISOBE
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Patent number: 7441130Abstract: A controller performs data communication with a host system based on fiber channel protocol and controls data input/output to or from a SATA disk drive. The controller includes an FC/SATA converter powered by a main power supply, and a resource management processor powered by a standby power supply. The resource management processor controls the power supply from the main power supply to the FC/SATA converter.Type: GrantFiled: September 13, 2005Date of Patent: October 21, 2008Assignee: Hitachi, Ltd.Inventors: Daisuke Isobe, Azuma Kano, Takahiko Iwasaki, Tsuyoshi Sasagawa, Midori Kurokawa
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Publication number: 20070006001Abstract: A controller performs data communication with a host system based on fibre channel protocol and controls data input/output to or from a SATA disk drive. The controller includes an FC/SATA converter powered by a main power supply, and a resource management processor powered by a standby power supply. The resource management processor controls the power supply from the main power supply to the FC/SATA converter.Type: ApplicationFiled: September 13, 2005Publication date: January 4, 2007Inventors: Daisuke Isobe, Azuma Kano, Takahiko Iwasaki, Tsuyoshi Sasagawa, Midori Kurokawa
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Patent number: 6970974Abstract: The present invention manages disk-drive types in a storage device in which a mixture of disk drives of a plurality of types with different interfaces is stored. The storage device enclosure stores a mixture of an FC disk drive 220F with a fiber channel interface and a SATA disk drive with a serial interface. The SATA disk drive is connected to a fiber channel via an FC/SATA interface connection device 233 that performs interface conversion. At startup and so forth, the controller 310 issues an inquiry to the enclosure management unit or to each of the disk drives and, based on the address allocated to each of the disk drives, or similar, automatically confirms the type of each disk drive and manages the confirmation results.Type: GrantFiled: March 25, 2004Date of Patent: November 29, 2005Assignee: Hitachi, Ltd.Inventors: Daisuke Isobe, Azuma Kano, Akihisa Hirasawa, Shingo Itagaki, Kenichi Tateyama, Yoshinori Nagaiwa, Nobuhiro Takahashi
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Publication number: 20050177683Abstract: The present invention manages disk-drive types in a storage device in which a mixture of disk drives of a plurality of types with different interfaces is stored. The storage device enclosure stores a mixture of an FC disk drive 220F with a fiber channel interface and a SATA disk drive with a serial interface. The SATA disk drive is connected to a fiber channel via an FC/SATA interface connection device 233 that performs interface conversion. At startup and so forth, the controller 310 issues an inquiry to the enclosure management unit or to each of the disk drives and, based on the address allocated to each of the disk drives, or similar, automatically confirms the type of each disk drive and manages the confirmation results.Type: ApplicationFiled: March 25, 2004Publication date: August 11, 2005Inventors: Daisuke Isobe, Azuma Kano, Akihisa Hirasawa, Shingo Itagaki, Kenichi Tateyama, Yoshinori Nagaiwa, Nobuhiro Takahashi