Patents by Inventor Hiroshi Isokawa
Hiroshi Isokawa 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: 20210035602Abstract: According to one embodiment, a magnetic disk device includes a disk, a head including a first write head and a second write head configured to write data to the disk and a read head configured to read data from the disk, and a controller configured to write write data to a first area of the disk with the first write head and to overwrite the write data written with the first write head in the first area with the second write head.Type: ApplicationFiled: February 20, 2020Publication date: February 4, 2021Inventor: Hiroshi Isokawa
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Patent number: 10803887Abstract: According to one embodiment, there is provided a magnetic disk drive comprising a magnetic disk, a magnetic head configured to read/write data from/to the magnetic disk, a signal processing circuit configured to convert data to be recorded on the magnetic disk into a write signal, and to output the write signal to the magnetic head that generates a recording magnetic field corresponding to the write signal, and a recording control circuit configured to control the signal processing circuit and the magnetic head to record, in a target recording area of the magnetic disk, first data in the target recording area with a recording magnetic field having a first frequency, and to write, second data different from the first data over the first data with a recording magnetic field having a second frequency higher than the first frequency.Type: GrantFiled: August 12, 2019Date of Patent: October 13, 2020Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventor: Hiroshi Isokawa
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Publication number: 20200234732Abstract: According to one embodiment, there is provided a disk device including a head, a disk, a first motor, and a first circuit. The disk has a recording surface. The first motor causes the head to seek along the recording surface. The first circuit can switch between a first state and a second state. The first state is a state where a current path of the first motor is electrically cut off from a first electricity storage unit. The second state is a state where the current path of the first motor is electrically connected to the first electricity storage unit.Type: ApplicationFiled: April 3, 2020Publication date: July 23, 2020Inventors: Daisuke Sudo, Hiroshi Isokawa
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Publication number: 20200227074Abstract: According to one embodiment, there is provided a magnetic disk drive comprising a magnetic disk, a magnetic head configured to read/write data from/to the magnetic disk, a signal processing circuit configured to convert data to be recorded on the magnetic disk into a write signal, and to output the write signal to the magnetic head that generates a recording magnetic field corresponding to the write signal, and a recording control circuit configured to control the signal processing circuit and the magnetic head to record, in a target recording area of the magnetic disk, first data in the target recording area with a recording magnetic field having a first frequency, and to write, second data different from the first data over the first data with a recording magnetic field having a second frequency higher than the first frequency.Type: ApplicationFiled: August 12, 2019Publication date: July 16, 2020Inventor: Hiroshi ISOKAWA
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Patent number: 10659622Abstract: An image forming apparatus, includes: an image former that forms an image on a sheet; an inspector that inspects an object; and a feed path that conveys the object to the inspector, wherein the feed path is installed to bypass the image former.Type: GrantFiled: February 23, 2019Date of Patent: May 19, 2020Assignee: KONICA MINOLTA, INC.Inventor: Hiroshi Isokawa
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Patent number: 10650858Abstract: According to one embodiment, there is provided a disk device including a head, a disk, a first motor, and a first circuit. The disk has a recording surface. The first motor causes the head to seek along the recording surface. The first circuit can switch between a first state and a second state. The first state is a state where a current path of the first motor is electrically cut off from a first electricity storage unit. The second state is a state where the current path of the first motor is electrically connected to the first electricity storage unit.Type: GrantFiled: August 28, 2018Date of Patent: May 12, 2020Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage CorporationInventors: Daisuke Sudo, Hiroshi Isokawa
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Patent number: 10616436Abstract: An image reading apparatus includes a reader, a transmitter, an opposing part that is placed opposite to the transmitter, and a hardware processor that controls a position of the opposing part such that a gap between the transmitter and the opposing part becomes a first gap when images are read by the reader, and a gap between the transmitter and the opposing part becomes a second gap, which is wider than the first gap, when no image is read by the reader.Type: GrantFiled: February 28, 2018Date of Patent: April 7, 2020Assignee: KONICA MINOLTA, INC.Inventor: Hiroshi Isokawa
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Patent number: 10490223Abstract: According to one embodiment, a magnetic disk device includes a disk, a head that writes data to the disk and reads data from the disk, and a controller. The controller is configured to read first data written on the disk, measure a first read error rate of the first data, determine a difference in the first read error rate from a previously determined read error rate of the first data, determine a current read error rate for second data written on the disk based on the difference in the first read error rate from the previously determined read error rate, and determine whether a refresh process is performed on the second data based on the current error rate.Type: GrantFiled: August 17, 2018Date of Patent: November 26, 2019Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventor: Hiroshi Isokawa
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Publication number: 20190312982Abstract: An image forming apparatus, includes: an image former that forms an image on a sheet; an inspector that inspects an object; and a feed path that conveys the object to the inspector, wherein the feed path is installed to bypass the image former.Type: ApplicationFiled: February 23, 2019Publication date: October 10, 2019Applicant: KONICA MINOLTA, INC.Inventor: Hiroshi ISOKAWA
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Publication number: 20190206437Abstract: According to one embodiment, there is provided a disk device including a head, a disk, a first motor, and a first circuit. The disk has a recording surface. The first motor causes the head to seek along the recording surface. The first circuit can switch between a first state and a second state. The first state is a state where a current path of the first motor is electrically cut off from a first electricity storage unit. The second state is a state where the current path of the first motor is electrically connected to the first electricity storage unit.Type: ApplicationFiled: August 28, 2018Publication date: July 4, 2019Inventors: Daisuke Sudo, Hiroshi Isokawa
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Publication number: 20190198054Abstract: According to one embodiment, a magnetic disk device includes a disk, a head that writes data to the disk and reads data from the disk, and a controller. The controller is configured to read first data written on the disk, measure a first read error rate of the first data, determine a difference in the first read error rate from a previously determined read error rate of the first data, determine a current read error rate for second data written on the disk based on the difference in the first read error rate from the previously determined read error rate, and determine whether a refresh process is performed on the second data based on the current error rate.Type: ApplicationFiled: August 17, 2018Publication date: June 27, 2019Inventor: Hiroshi ISOKAWA
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Patent number: 10200565Abstract: An image forming system includes an image forming device, a reading device and a hardware processor. The image forming device includes an image former that forms an image on a sheet. The reading device includes a line sensor and a lens unit. The line sensor reads the sheet with the image formed, thereby obtaining a read image. The lens unit includes a plurality of lenses and forms an image of the sheet on the line sensor. The hardware processor identifies a sheet region of the sheet in the read image, and corrects a magnification of each subregion in a main scanning direction of the sheet region according to a characteristic of a portion in the main scanning direction of the lens unit, the portion having being used in forming an image of the subregion on the line sensor.Type: GrantFiled: September 19, 2017Date of Patent: February 5, 2019Assignee: KONICA MINOLTA, INC.Inventors: Hiroshi Isokawa, Kenji Kawatsu
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Patent number: 10142518Abstract: An image reading apparatus capable of performing accurate image correction is provided. The image reading apparatus is provided with a colorimeter which colorimetrically measures an image formed on a sheet based on the optical spectrum in a visible light range, a reference plate located in a position facing the colorimeter with a chromatic reflecting surface, a temperature detection unit configured to detect the temperature of the reference plate, the determination unit configured to determine whether or not the colorimeter is in a normal condition based on the temperature of the reference plate detected by the temperature detection unit and the optical spectrum in the visible light range.Type: GrantFiled: September 16, 2016Date of Patent: November 27, 2018Assignee: Konica Minolta, Inc.Inventor: Hiroshi Isokawa
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Publication number: 20180270386Abstract: An image reading apparatus includes a reader, a transmitter, an opposing part that is placed opposite to the transmitter, and a hardware processor that controls a position of the opposing part such that a gap between the transmitter and the opposing part becomes a first gap when images are read by the reader, and a gap between the transmitter and the opposing part becomes a second gap, which is wider than the first gap, when no image is read by the reader.Type: ApplicationFiled: February 28, 2018Publication date: September 20, 2018Applicant: Konica Minolta, Inc.Inventor: Hiroshi Isokawa
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Patent number: 9948803Abstract: A reading apparatus which is connected to an image forming apparatus that forms an image on a recording medium, the reading apparatus including: a supporting section which forms a reading surface for reading the image on the recording medium by contacting the recording medium on which the image is formed by the image forming apparatus; a conveyance section which conveys the recording medium so that the recording medium contacts the supporting section from a leading direction at a predetermined leading angle with respect to the reading surface and moves apart from the supporting section to an ejection direction at a predetermined ejection angle with respect to the reading surface; and a reading section which reads the image on the recording medium at a position where the reading surface is formed.Type: GrantFiled: March 24, 2016Date of Patent: April 17, 2018Assignee: KONICA MINOLTA, INC.Inventor: Hiroshi Isokawa
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Patent number: 9930198Abstract: An image reading apparatus and an image forming system which are hardly affected by noise due to paper dust or the like is provided. An image reading apparatus includes a back side image reading unit and a front side image reading unit which are continuously arranged in a sheet conveying direction. Also, an upstream side conveyance member and an intermediate conveyance member are arranged adjacent to each other in the upstream and downstream sides of the back side image reading unit. The intermediate conveyance member and the downstream side conveyance member are arranged adjacent to each other in the upstream and downstream sides of the front side image reading unit. The colorimetric unit is arranged outside an area from the upstream side conveyance member to the downstream side conveyance member in the sheet conveying direction.Type: GrantFiled: May 17, 2016Date of Patent: March 27, 2018Assignee: Konica Minolta, Inc.Inventor: Hiroshi Isokawa
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Publication number: 20180084145Abstract: An image forming system includes an image forming device, a reading device and a hardware processor. The image forming device includes an image former that forms an image on a sheet. The reading device includes a line sensor and a lens unit. The line sensor reads the sheet with the image formed, thereby obtaining a read image. The lens unit includes a plurality of lenses and forms an image of the sheet on the line sensor. The hardware processor identifies a sheet region of the sheet in the read image, and corrects a magnification of each subregion in a main scanning direction of the sheet region according to a characteristic of a portion in the main scanning direction of the lens unit, the portion having being used in forming an image of the subregion on the line sensor.Type: ApplicationFiled: September 19, 2017Publication date: March 22, 2018Applicant: Konica Minolta, Inc.Inventors: Hiroshi ISOKAWA, Kenji KAWATSU
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Publication number: 20170094126Abstract: An image reading apparatus capable of performing accurate image correction is provided. The image reading apparatus is provided with a colorimeter which colorimetrically measures an image formed on a sheet based on the optical spectrum in a visible light range, a reference plate located in a position facing the colorimeter with a chromatic reflecting surface, a temperature detection unit configured to detect the temperature of the reference plate, the determination unit configured to determine whether or not the colorimeter is in a normal condition based on the temperature of the reference plate detected by the temperature detection unit and the optical spectrum in the visible light range.Type: ApplicationFiled: September 16, 2016Publication date: March 30, 2017Applicant: Konica Minolta, Inc.Inventor: Hiroshi ISOKAWA
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Patent number: 9548071Abstract: A storage apparatus of an embodiment includes a magnetic disk, a head, and a controller. The head includes a writing unit that outputs a magnetic field to record write data into a recording region of the magnetic disk to which light is irradiated and a reading unit that reads read data from the recording region of the magnetic disk. Based on a first spectrum of first read data read by the reading unit at a first position of the magnetic disk and a second spectrum of second read data read by the reading unit at a second position which is a following position of the first position, the controller detects whether an offset of the writing unit occurs while writing into the recording region of the magnetic disk is performed by the writing unit.Type: GrantFiled: November 20, 2015Date of Patent: January 17, 2017Assignee: Kabushiki Kaisha ToshibaInventor: Hiroshi Isokawa
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Publication number: 20160366296Abstract: An image reading apparatus and an image forming system which are hardly affected by noise due to paper dust or the like is provided. An image reading apparatus includes a back side image reading unit and a front side image reading unit which are continuously arranged in a sheet conveying direction. Also, an upstream side conveyance member and an intermediate conveyance member are arranged adjacent to each other in the upstream and downstream sides of the back side image reading unit. The intermediate conveyance member and the downstream side conveyance member are arranged adjacent to each other in the upstream and downstream sides of the front side image reading unit. The colorimetric unit is arranged outside an area from the upstream side conveyance member to the downstream side conveyance member in the sheet conveying direction.Type: ApplicationFiled: May 17, 2016Publication date: December 15, 2016Applicant: KONICA MINOLTA, INC.Inventor: Hiroshi ISOKAWA