Patents by Inventor Kouji Fujita
Kouji Fujita 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: 20140301176Abstract: An optical information recording/reproducing apparatus for recording information on a recording medium and/or reproducing information from the recording medium, includes: a laser light source for performing recording and/or reproducing information; a shielding part, using a liquid crystal, that can switch between transmission and interception of laser light emitted from the laser light source; a driving circuit for driving the switching between transmission and interception of the shielding part; a moving part for relatively moving the shielding part and the laser light; and a controlling circuit for controlling the moving part. The moving part relatively moves the shielding part and the laser light so as to switch a region to which the laser light is applied from a first region of the shielding part to a second region thereof different from the first region, in order to prevent the liquid crystal from deteriorating.Type: ApplicationFiled: April 2, 2014Publication date: October 9, 2014Applicants: Hitachi Consumer Electronics Co., Ltd., Hitachi-LG Data Storage, Inc.Inventors: Hirofumi TAGUCHI, Kouji FUJITA, Taku HOSHIZAWA, Ukyo IKEDA
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Patent number: 8830809Abstract: An optical information recording/reproduction device includes a detection unit which detects a focus-direction height of a recording medium, a focus adjustment unit which adjusts a focus-direction distance between the recording medium and a signal light optical system and a reference light system, and a control unit which controls the focus adjustment unit so that a relative distance between the object lens of the signal light optical system and the recording medium is adjusted according to the focus-direction height of the recording medium detected by the detection unit.Type: GrantFiled: May 9, 2013Date of Patent: September 9, 2014Assignees: Hitachi-LG Data Storage, Inc., Hitachi Consumer Electronics Co., Ltd.Inventor: Kouji Fujita
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Publication number: 20140064049Abstract: An optical information recording/reproduction device includes a detection unit which detects a focus-direction height of a recording medium, a focus adjustment unit which adjusts a focus-direction distance between the recording medium and a signal light optical system and a reference light system, and a control unit which controls the focus adjustment unit so that a relative distance between the object lens of the signal light optical system and the recording medium is adjusted according to the focus-direction height of the recording medium detected by the detection unit.Type: ApplicationFiled: May 9, 2013Publication date: March 6, 2014Applicants: Hitachi Consumer Electronics Co., Ltd., Hitachi-LG Data Storage, Inc.Inventor: Kouji FUJITA
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Patent number: 8326122Abstract: Apparatus which records and reproduces signals includes a unit which receives signals, a first recorder which records the signals received by the unit on a first recording medium, and a first reproducer which reproduces the signals recorded on the first recording medium. A second recorder is provided which records the signals reproduced by the first reproducer on a second recording medium, a detector is provided which detects a commercial message portion from the signals recorded on the second recording medium, and a second reproducer is provided which reproduces the signals recorded on the second recording medium while excluding the commercial message portion detected by the detector.Type: GrantFiled: November 14, 2008Date of Patent: December 4, 2012Assignee: Hitachi, Ltd.Inventors: Kouji Fujita, Hideo Nishijima, Motoyoshi Sasaki
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Patent number: 8234936Abstract: A torque wrench having ease of operation compatible with improved accuracy of measurement. The torque wrench includes a tightening portion, a housing having a front side cover part and a back side grip part and a shaft-like strain body that is contained inside the housing. First distortion sensors and second distortion sensors are arranged on the strain body at spaced points in the axial direction of the strain body for measuring an amount of distortion of the strain body. A microprocessor chip has functions including computation of a tightening torque which is corrected for errors due to changes in a point of effort where a tightening force is applied by a user. The correction is based on the detection result of the first distortion sensors and the second distortion sensors. An output portion outputs the corrected tightening torque measurement value.Type: GrantFiled: May 28, 2008Date of Patent: August 7, 2012Assignees: Hosiden Corporation, Kyoto Tool Co., Ltd.Inventors: Shogo Nakata, Tadashi Hanai, Kouji Fujita, Masahiko Umekawa, Hiroshi Uchida
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Patent number: 8169867Abstract: In an optical disc drive apparatus, when a start time of a tracking pull-in operation is adjusted according to the eccentricity amount of the optical disc, a suitable starting point of the tracking pull-in operation can be always captured and the pull-in operation of the tracking control can be stably performed, without depending on the eccentricity amount of the optical disc. Further, the eccentricity amount and an eccentricity phase are detected from a track zero crossing signal before the tracking pull-in, and an eccentricity compensation signal of the track is added to the tracking control signal. As a result, also in the optical disc with the large eccentricity amount, the tracking pull-in operation can be stably performed.Type: GrantFiled: October 29, 2008Date of Patent: May 1, 2012Assignee: Hitachi, Ltd.Inventor: Kouji Fujita
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Patent number: 7967462Abstract: A light source includes a plurality of light emitting elements, and each light emitting element is disposed in such a manner that a direction of an optical axis of the light emitting element having a highest luminance is disposed at a predetermined inclination angle relative to a plane of the liquid crystal display. The optical guide member has an optical guide portion of a wedge shape having a first flat plane generally perpendicular to the optical axis of each light emitting element for receiving light from each light emitting element and a second flat plane having a predetermined angle relative to the optical axis and intersecting the first flat plane at an acute angle for reflecting light. A plurality of optical guide portions are disposed in a plane and formed integrally along a predetermined direction corresponding to the inclination direction of the light emitting elements.Type: GrantFiled: January 29, 2009Date of Patent: June 28, 2011Assignee: Hitachi, Ltd.Inventors: Kenji Ogiro, Nobuo Masuoka, Kouji Fujita
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Publication number: 20110122759Abstract: According to the invention, techniques for recording data onto recording media at relatively high transfer rates for relatively long periods of time. Embodiments according to the present invention include systems and apparatus capable of an improved sustained rate of data recording onto disk type-recording media, for example. Many embodiments can remove the upper limits of both recording capacity and the number of media that can be used. Select embodiments can be used with different kinds of recording media as well. In a specific embodiment, the area on a hard disk is divided into three areas. A first area can be suitable for sequential recording of continuous data. A second area can be suitable for random recording of discontinuous data. A third area can be used for recording logical sector numbers, coupling logical sector numbers, and file information that are used for marking each of the first and second areas, so that continuous data can be recorded on the hard disk at a high data rate.Type: ApplicationFiled: January 27, 2011Publication date: May 26, 2011Applicant: Hitachi, Ltd.Inventors: Kouji Fujita, Hideo Nishijima, Kazuya Yamashita
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Patent number: 7903930Abstract: According to the invention, techniques for recording data onto recording media at relatively high transfer rates for relatively long periods of time. Embodiments according to the present invention include systems and apparatus capable of an improved sustained rate of data recording onto disk type-recording media, for example. Many embodiments can remove the upper limits of both recording capacity and the number of media that can be used. Select embodiments can be used with different kinds of recording media as well. In a specific embodiment, the area on a hard disk is divided into three areas. A first area can be suitable for sequential recording of continuous data. A second area can be suitable for random recording of discontinuous data. A third area can be used for recording logical sector numbers, coupling logical sector numbers, and file information that are used for marking each of the first and second areas, so that continuous data can be recorded on the hard disk at a high data rate.Type: GrantFiled: September 9, 2004Date of Patent: March 8, 2011Assignee: Hitachi, Ltd.Inventors: Kouji Fujita, Hideo Nishijima, Kazuya Yamashita
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Patent number: 7832286Abstract: The invention seek to enable to share main components other than a tightening unit even in use for different effective lengths corresponding to ranges of tightening torques. There are provided: a tightening unit 10 such as a ratchet; a housing 20 having a two-divided structure including a front side cover part 21 and a back side grip part 22; a strain body 30 provided inside the housing 20 and replaceably coupling the tightening unit 10 thereto; a distortion sensor 40, provided to the strain body 30, for detecting the distorted amount of the strain body 30 due to the tightening force of the tightening unit 10; a microprocessor chip 100 having functions including computing the tightening torque of the tightening unit 10 based on torque reference values prepared in advance and detection results of the distortion sensor 40; and an output unit 300 for outputting such as the tightening torque.Type: GrantFiled: January 9, 2006Date of Patent: November 16, 2010Assignees: Kyoto Tool Co., Ltd., Hosiden CorporationInventors: Takamichi Nakagawa, Shogo Nakata, Masahiko Umekawa, Tadashi Hanai, Kouji Fujita
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Patent number: 7835617Abstract: According to the invention, techniques for recording data onto recording media at relatively high transfer rates for relatively long periods of time. Embodiments according to the present invention include systems and apparatus capable of an improved sustained rate of data recording onto disk type-recording media, for example. Many embodiments can remove the upper limits of both recording capacity and the number of media that can be used. Select embodiments can be used with different kinds of recording media as well. In a specific embodiment, the area on a hard disk is divided into three areas. A first area can be suitable for sequential recording of continuous data. A second area can be suitable for random recording of discontinuous data. A third area can be used for recording logical sector numbers, coupling logical sector numbers, and file information that are used for marking each of the first and second areas, so that continuous data can be recorded on the hard disk at a high data rate.Type: GrantFiled: September 9, 2004Date of Patent: November 16, 2010Assignee: Hitachi, Ltd.Inventors: Kouji Fujita, Hideo Nishijima, Kazuya Yamashita
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Publication number: 20100206141Abstract: [Problem to be Solved] The invention aims at ease of operation compatible with improved accuracy of measurement. [Constitution] The invention includes a tightening portion 10 such as a ratchet wrench, a housing 20 having a front side cover part 21 and a back side grip part 22, a shaft-like strain body 30 that is contained inside the housing 20 and has a leading end coupled with the replaceable tightening portion 10, first distortion sensors 42a and 42b and second distortion sensors 43a and 43b that are arranged at spaced points in the axial direction of the strain body 30 for measuring a tightening torque T, a setting portion 70 for setting a tightening torque set value etc.Type: ApplicationFiled: May 28, 2008Publication date: August 19, 2010Applicants: KYOTO TOOL CO., LTD., HOSIDEN CORPORATIONInventors: Shogo Nakata, Tadashi Hanai, Kouji Fujita, Masahiko Umekawa, Hiroshi Uchida
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Patent number: 7763348Abstract: The present invention relates to a cellulosic particle body comprising interconnected cellulosic small particles with small interparticle spaces and to a method of producing said cellulosic particle body which comprises dispersing cellulosic small particles in an alkaline medium and contacting the resulting suspension with a coagulating solution. In this specification, the above technology will be referred to as the first invention.Type: GrantFiled: November 9, 2007Date of Patent: July 27, 2010Assignee: Kaneka CorporationInventors: Kouji Fujita, Tsutomu Okuyama, Kouichiro Tanaka, Satoshi Takata
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Patent number: 7693017Abstract: In a conventional method for preventing a collision between a lens and an optical disc which uses a control system similar to the servo control of the optical disc, it is feared that, when there is no need to apply the servo, the collision prevention method may not perform its function satisfactorily. In an optical disc device that operates with a part of its functions suspended for reduced power consumption, the conventional method is not enough to avoid the collision between the lens and the optical disc. By arranging the lens/disc collision prevention mechanism independently operable, it is possible to prevent the collision between the lens and the disc even during the operation with limited functions.Type: GrantFiled: July 25, 2006Date of Patent: April 6, 2010Assignee: Hitachi, Ltd.Inventors: Takahiro Matsuda, Kouji Fujita
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Patent number: 7660223Abstract: A disc device includes a lens that focuses a laser light on an optical disc surface, a focus drive unit that drives the lens in a focusing direction, a focus control unit that controls to focus the laser light on the optical disc surface, a focus displacement detecting unit that detects a displaced amount in the focusing direction, a differentiation unit that differentiates a focus displacement detected signal, and a unit that inverts a sign of a differentiated signal, thereby, the disc device is driven intermittently to restrain a motion of an objective lens in a focusing direction and avoid colliding the objective lens with the optical disc surface.Type: GrantFiled: March 25, 2008Date of Patent: February 9, 2010Assignee: Hitachi, Ltd.Inventor: Kouji Fujita
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Publication number: 20090201668Abstract: A light source includes a plurality of light emitting elements, and each light emitting element is disposed in such a manner that a direction of an optical axis of the light emitting element having a highest luminance is disposed at a predetermined inclination angle relative to a plane of the liquid crystal display. The optical guide member has an optical guide portion of a wedge shape having a first flat plane generally perpendicular to the optical axis of each light emitting element for receiving light from each light emitting element and a second flat plane having a predetermined angle relative to the optical axis and intersecting the first flat plane at an acute angle for reflecting light. A plurality of optical guide portions are disposed in a plane and formed integrally along a predetermined direction corresponding to the inclination direction of the light emitting elements.Type: ApplicationFiled: January 29, 2009Publication date: August 13, 2009Inventors: Kenji Ogiro, Nobuo Masuoka, Kouji Fujita
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Publication number: 20090147632Abstract: In an optical disc drive apparatus, when a start time of a tracking pull-in operation is adjusted according to the eccentricity amount of the optical disc, a suitable starting point of the tracking pull-in operation can be always captured and the pull-in operation of the tracking control can be stably performed, without depending on the eccentricity amount of the optical disc. Further, the eccentricity amount and an eccentricity phase are detected from a track zero crossing signal before the tracking pull-in, and an eccentricity compensation signal of the track is added to the tracking control signal. As a result, also in the optical disc with the large eccentricity amount, the tracking pull-in operation can be stably performed.Type: ApplicationFiled: October 29, 2008Publication date: June 11, 2009Inventor: Kouji Fujita
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Publication number: 20090074379Abstract: Apparatus which records and reproduces signals includes a unit which receives signals, a first recorder which records the signals received by the unit on a first recording medium, and a first reproducer which reproduces the signals recorded on the first recording medium. A second recorder is provided which records the signals reproduced by the first reproducer on a second recording medium, a detector is provided which detects a commercial message portion from the signals recorded on the second recording medium, and a second reproducer is provided which reproduces the signals recorded on the second recording medium while excluding the commercial message portion detected by the detector.Type: ApplicationFiled: November 14, 2008Publication date: March 19, 2009Inventors: Kouji Fujita, Hideo Nishijima, Motoyoshi Sasaki
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Publication number: 20080298211Abstract: A disc device includes a lens that focuses a laser light on an optical disc surface, a focus drive unit that drives the lens in a focusing direction, a focus control unit that controls to focus the laser light on the optical disc surface, a focus displacement detecting unit that detects a displaced amount in the focusing direction, a differentiation unit that differentiates a focus displacement detected signal, and a unit that inverts a sign of a differentiated signal, thereby, the disc device is driven intermittently to restrain a motion of an objective lens in a focusing direction and avoid colliding the objective lens with the optical disc surface.Type: ApplicationFiled: March 25, 2008Publication date: December 4, 2008Inventor: Kouji FUJITA
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Patent number: 7457513Abstract: A recorder/reproducer for recording and reproducing signals includes a receiver which receives signals, a first recorder which records the signals received by the receiver on a first recording medium, and a first reproducer which reproduces the signals recorded on the first recording medium. A second recorder is provided which records the signals reproduced by the first reproducer on a second recording medium, a detector is provided which detects a commercial message portion from the signals recorded on the second recording medium, and a second reproducer is provided which reproduces the signals recorded on the second recording medium while excluding the commercial message portion detected by the detector.Type: GrantFiled: May 9, 2005Date of Patent: November 25, 2008Assignee: Hitachi, Ltd.Inventors: Kouji Fujita, Hideo Nishijima, Motoyoshi Sasaki