Patents by Inventor Hiroyuki Kumasawa
Hiroyuki Kumasawa 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: 20160259571Abstract: The storage subsystem according to the present invention is equipped with a cache memory having a nonvolatile memory and a volatile memory. Write data sent from a superior device is stored in the nonvolatile memory, and data subjected to a read request from the superior device is cached from a final storage media to the volatile memory. When power supply from an external power supply has stopped, data having a high access frequency out of the data stored in the volatile memory is backed up in a nonvolatile memory, and when power supply from the external power supply is resumed, the data backed up from the volatile memory to the nonvolatile memory is migrated again to the volatile memory.Type: ApplicationFiled: June 6, 2014Publication date: September 8, 2016Applicant: HITACHI, LTD.Inventors: Hiroyuki KUMASAWA, Yuji YAMAGUCHI
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Patent number: 8656099Abstract: A storage apparatus and its control method capable of implementing thin provisioning and reducing power consumption of storage devices are provided. The storage apparatus classifies a plurality of storage devices, which provide a pool with a storage resource, into a plurality of groups; performs thin provisioning operation by setting some of the plurality of groups to an active mode, in which the storage devices belonging to the groups are made to enter an activated state; sets other groups to a power-saving mode in which the storage devices are made to enter a power-saving state; and sequentially switches between the group(s) in the active mode and the group(s) in the power-saving mode among the plurality of groups.Type: GrantFiled: July 22, 2010Date of Patent: February 18, 2014Assignee: Hitachi, Ltd.Inventors: Kenichi Saito, Takashi Chikusa, Kazuya Hirano, Hiroyuki Kumasawa
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Patent number: 8612644Abstract: A storage apparatus is provided that is capable of reducing data maintenance management costs with a performance that is both highly reliable and fast. The present invention is storage apparatus where an intermediary device is arranged between a controller and a plurality of disk devices of different performances arranged in a hierarchical manner. The controller unit carries out I/O accesses to and from the disk devices via the intermediary devices based on access requests sent from host apparatus. The intermediary device includes a power saving control function for the disk device and carries out operation control such as spin off and spin up of disk devices in accordance with conditions set in advance.Type: GrantFiled: May 31, 2011Date of Patent: December 17, 2013Assignee: Hitachi, Ltd.Inventors: Hiroyuki Kumasawa, Takashi Chikusa, Satoru Yamaura
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Patent number: 8508691Abstract: An optical path unit and a liquid crystal display device excellent in luminance in the front direction are provided. A backlight unit 2, two prism films 4a and 4b, a first polarizing plate 5, a liquid crystal cell 1 having a liquid crystal layer between a pair of substrates, and a second polarizing plate 6 are disposed in the sequence. The prism films 4a and 4b are provided with a plurality of linear prisms in parallel on a light incident surface, the linear prisms having a polygonal and tapered cross section and an endmost vertex angle of 90° to 110°. The first polarizing plate 5 and the second polarizing plate 6 are disposed such that transmission axes thereof have a crossed Nicols relationship.Type: GrantFiled: August 10, 2009Date of Patent: August 13, 2013Assignee: Sumitomo Chemical Company, LimitedInventors: Tomonori Miyamoto, Motohiro Yamahara, Hiroyuki Kumasawa, Akiyoshi Kanemitsu
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Patent number: 8462502Abstract: A storage device mounting structure with excellent handleability for storage devices is provided. A storage device mounting structure according to this invention includes a unit for housing a plurality of storage devices, a chassis for housing the unit, and a guide mechanism for supporting the unit and guiding it into or out of the chassis, wherein the unit has an open area for inserting the plurality of storage devices from a front face of the unit into the unit and is supported by the guide mechanism so that the unit can freely move rotationally to make a surface of the unit, where the open area exists, positioned at the front of the chassis.Type: GrantFiled: November 9, 2010Date of Patent: June 11, 2013Assignee: Hitachi, Ltd.Inventors: Kazuya Hirano, Takashi Chikusa, Hiroyuki Kumasawa, Kenichi Saito
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Publication number: 20120113582Abstract: A storage device mounting structure with excellent handleability for storage devices is provided. A storage device mounting structure according to this invention includes a unit for housing a plurality of storage devices, a chassis for housing the unit, and a guide mechanism for supporting the unit and guiding it into or out of the chassis, wherein the unit has an open area for inserting the plurality of storage devices from a front face of the unit into the unit and is supported by the guide mechanism so that the unit can freely move rotationally to make a surface of the unit, where the open area exists, positioned at the front of the chassis.Type: ApplicationFiled: November 9, 2010Publication date: May 10, 2012Inventors: Kazuya Hirano, Takashi Chikusa, Hiroyuki Kumasawa, Kenichi Saito
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Patent number: 8131892Abstract: A storage apparatus is provided that is capable of reducing data maintenance management costs with a performance that is both highly reliable and fast. The present invention is storage apparatus where an intermediary device is arranged between a controller and a plurality of disk devices of different performances arranged in a hierarchical manner. The controller unit carries out I/O accesses to and from the disk devices via the intermediary devices based on access requests sent from host apparatus. The intermediary device includes a power saving control function for the disk device and carries out operation control such as spin off and spin up of disk devices in accordance with conditions set in advance.Type: GrantFiled: May 7, 2010Date of Patent: March 6, 2012Assignee: Hitachi, Ltd.Inventors: Hiroyuki Kumasawa, Takashi Chikusa, Satoru Yamaura
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Publication number: 20120023292Abstract: A storage apparatus and its control method capable of implementing thin provisioning and reducing power consumption of storage devices are provided. A storage apparatus classifies a plurality of storage devices, which provide a pool with a storage resource, into a plurality of groups; performs thin provisioning operation by setting some of the plurality of groups to an active mode, in which the storage devices belonging to the groups are made to enter an activated state; sets other groups to a power-saving mode in which the storage devices are made to enter a power-saving state; and sequentially switches between the group(s) in the active mode and the group(s) in the power-saving mode among the plurality of groups.Type: ApplicationFiled: July 22, 2010Publication date: January 26, 2012Applicant: HITACHI, LTD.Inventors: Kenichi Saito, Takashi Chikusa, Kazuya Hirano, Hiroyuki Kumasawa
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Publication number: 20110231683Abstract: A storage apparatus is provided that is capable of reducing data maintenance management costs with a performance that is both highly reliable and fast. The present invention is storage apparatus where an intermediary device is arranged between a controller and a plurality of disk devices of different performances arranged in a hierarchical manner. The controller unit carries out I/O accesses to and from the disk devices via the intermediary devices based on access requests sent from host apparatus. The intermediary device includes a power saving control function for the disk device and carries out operation control such as spin off and spin up of disk devices in accordance with conditions set in advance.Type: ApplicationFiled: May 31, 2011Publication date: September 22, 2011Applicant: HITACHI, LTD.Inventors: Hiroyuki KUMASAWA, Takashi Chikusa, Satoru Yamaura
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Publication number: 20110188265Abstract: The luminance in the front direction is enhanced in an illumination device provided with a light source, a light diffusion means, and a light-collecting means disposed in this order. The light source 1 is provided with a rectangular parallelepiped case 12 having an opening 121 and a plurality of CCFLs 11 disposed in the case 12. A light diffusion plate 2 is mounted so as to close the opening 121 of the case 12. The light-collecting means 3 has two prism films 31 and 32 which are disposed on the light-exiting surface of the light diffusion plate 2 such that ridge lines of linear prisms are orthogonal to each other.Type: ApplicationFiled: August 10, 2009Publication date: August 4, 2011Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Hiroyuki Kumasawa, Akiyoshi Kanemitsu, Tomonori Miyamoto, Motohiro Yamahara
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Publication number: 20110181810Abstract: An optical path unit and a liquid crystal display device excellent in luminance in the front direction are provided. A backlight unit 2, two prism films 4a and 4b, a first polarizing plate 5, a liquid crystal cell 1 having a liquid crystal layer between a pair of substrates, and a second polarizing plate 6 are disposed in the sequence. The prism films 4a and 4b are provided with a plurality of linear prisms in parallel on a light incident surface, the linear prisms having a polygonal and tapered cross section and an endmost vertex angle of 90° to 110°. The first polarizing plate 5 and the second polarizing plate 6 are disposed such that transmission axes thereof have a crossed Nicols relationship.Type: ApplicationFiled: August 10, 2009Publication date: July 28, 2011Inventors: Tomonori Miyamoto, Motohiro Yamahara, Hiroyuki Kumasawa, Akiyoshi Kanemitsu
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Patent number: 7917551Abstract: One or more storage controllers include a folder configuration unit for configuring a plurality of folders to store the plurality of contents in the plurality of logical volumes, a core-contents management unit for specifying and managing core-contents to become the core from the plurality of contents to be stored in the plurality of logical volumes or the plurality of folders, a related contents management unit for managing the core-contents and one or more related contents associated with a part or the whole of the core-contents from a plurality of contents to be stored in the plurality of logical volumes or the plurality of folders, and a group folder configuration unit for configuring a group folder that groups the core-contents and the related contents across the plurality of logical volumes or the plurality of folders.Type: GrantFiled: January 9, 2008Date of Patent: March 29, 2011Assignee: Hitachi, Ltd.Inventors: Takashi Chikusa, Satoru Yamaura, Kenichi Saitou, Hiroyuki Kumasawa, Masanobu Uryuu
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Publication number: 20100223418Abstract: A storage apparatus is provided that is capable of reducing data maintenance management costs with a performance that is both highly reliable and fast. The present invention is storage apparatus where an intermediary device is arranged between a controller and a plurality of disk devices of different performances arranged in a hierarchical manner. The controller unit carries out I/O accesses to and from the disk devices via the intermediary devices based on access requests sent from host apparatus. The intermediary device includes a power saving control function for the disk device and carries out operation control such as spin off and spin up of disk devices in accordance with conditions set in advance.Type: ApplicationFiled: May 7, 2010Publication date: September 2, 2010Applicant: HITACHI, LTD.Inventors: Hiroyuki KUMASAWA, Takashi Chikusa, Satoru Yamaura
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Patent number: 7730235Abstract: A storage apparatus is provided that is capable of reducing data maintenance management costs with a performance that is both highly reliable and fast. The present invention is storage apparatus where an intermediary device is arranged between a controller and a plurality of disk devices of different performances arranged in a hierarchical manner. The controller unit carries out I/O accesses to and from the disk devices via the intermediary devices based on access requests sent from host apparatus. The intermediary device includes a power saving control function for the disk device and carries out operation control such as spin off and spin up of disk devices in accordance with conditions set in advance.Type: GrantFiled: October 11, 2006Date of Patent: June 1, 2010Assignee: Hitachi, Ltd.Inventors: Hiroyuki Kumasawa, Takashi Chikusa, Satoru Yamaura
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Publication number: 20090276568Abstract: Proposed are a storage system, data processing method and storage apparatus capable of performing stable data I/O processing. Each of the storage apparatuses configured in the storage group stores group configuration information containing priority information given to each storage apparatus, and the storage apparatus with the highest priority becomes a master and performs virtualization processing and data I/O processing, and another storage apparatus belonging to this storage group performs internal processing of the storage group.Type: ApplicationFiled: June 1, 2009Publication date: November 5, 2009Inventors: Takashi CHIKUSA, Satoru YAMAURA, Hiroyuki KUMASAWA, Hironori NAKAMA, Masashi YUKAWA
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Patent number: 7609336Abstract: The present invention provides a liquid crystal display device capable of achieving natural and high-quality color display without reddish color shift, not only when viewed in the normal direction but also when viewed obliquely. A liquid crystal display device 1 of the present invention includes a light diffuser plate 3, a light source 2 disposed on the back side of the light diffuser plate 3, and a liquid crystal panel 30 disposed on the front side of the light diffuser plate 3, wherein the light diffuser plate 3 is constituted by dispersing light diffusing particles in a transparent material, and the absolute value of a difference ?n in the refractive index between the transparent material and the light diffusing particles and a 50% cumulative particle diameter D50 (?m) of the light diffusing particles satisfy a relation 0.01??n×D50?0.25 or 0.61??n×D50?0.75.Type: GrantFiled: November 5, 2007Date of Patent: October 27, 2009Assignee: Sumitomo Chemical Company, LimitedInventors: Akiyoshi Kanemitsu, Motohiro Yamahara, Hiroyuki Kumasawa
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Patent number: 7558916Abstract: Proposed are a storage system, data processing method and storage apparatus capable of performing stable data I/O processing. Each of the storage apparatuses configured in the storage group stores group configuration information containing priority information given to each storage apparatus, and the storage apparatus with the highest priority becomes a master and performs virtualization processing and data I/O processing, and another storage apparatus belonging to this storage group performs internal processing of the storage group.Type: GrantFiled: March 16, 2006Date of Patent: July 7, 2009Assignee: Hitachi, Ltd.Inventors: Takashi Chikusa, Satoru Yamaura, Hiroyuki Kumasawa, Hironori Nakama, Masashi Yukawa
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Publication number: 20090128739Abstract: There is provided a light diffuser plate with a light-collecting layer, which is sufficiently prevented from flawing and which is used to make it possible to sufficiently ensure a luminance in a forward direction. A light diffuser plate 3 with a light-collecting layer, according to the present invention, comprises a light-diffusing substrate 31 and a light-collecting sheet 32, which are disposed to be superposed on each other, and is wherein the light-diffusing substrate 31 and the light-collecting sheet 32 are jointed to each other by joint portions 34 which are so disposed as to be scattered over a whole plane of the light diffuser plate, and wherein an air layer 33 exists between the light-diffusing substrate 31 and the light-collecting sheet 32, in an area other than the joint portions 34.Type: ApplicationFiled: November 14, 2008Publication date: May 21, 2009Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Hiroyuki KUMASAWA, Akiyoshi Kanemitsu
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Publication number: 20090129059Abstract: The present invention provides a light collecting sheet-laminated light diffuser plate which can diffusely transmit transmission light (L) with sufficient luminance without causing rubbing of a light diffuser plate (2) and a light collecting sheet (4) against each other. The light collecting sheet-laminated light diffuser plate (1) of the present invention comprises a light diffuser plate (2), a light collecting sheet (4) and an adhesive layer (3), the light collecting sheet being laminated on one side (2a) of the light diffuser plate via the adhesive layer, wherein the one side (2a) is provided with unevenness, and the light collecting sheet (4) is laminated on the one side (2a) so that the adhesive layer (3) is not contacted with the bottom (2a1) of the unevenness.Type: ApplicationFiled: May 27, 2008Publication date: May 21, 2009Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Hiroyuki KUMASAWA, Akiyoshi KANEMITSU
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Publication number: 20090066892Abstract: The present invention provides a light diffuser plate with a light-collecting layer, which can be sufficiently prevented from flawing and which can ensure a sufficient luminance in a front direction. A light diffuser plate 3 with a light-collecting layer, of the present invention, comprises a light-diffusing substrate 31 and a light-collecting sheet 32 which are disposed in a stacked state and are united at their peripheral portions so that an air layer 33 is formed between the light-diffusing substrate 31 and the light-collecting sheet 32.Type: ApplicationFiled: August 28, 2008Publication date: March 12, 2009Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Hiroyuki Kumasawa, Akiyoshi Kanemitsu