Patents by Inventor Yoshihiko Tanaka
Yoshihiko Tanaka 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: 20170235247Abstract: An image-forming apparatus includes a light-irradiation unit configured to move a spot of laser light on a surface of a photosensitive member at a non-constant scanning velocity in a main scanning direction to form a latent image on the photosensitive member, an image data correcting unit configured to correct a length in the main scanning direction of image data by inserting one or more image data pieces into the image data, the number of the image data pieces increasing as the scanning velocity increases, and/or extracting one or more image data pieces from the image data, the number of the image data pieces increasing as the scanning velocity decreases, and a brightness correcting unit configured to correct a brightness of the laser light so that an emission brightness increases as the scanning velocity increases and/or the emission brightness decreases as the scanning velocity decreases.Type: ApplicationFiled: May 1, 2017Publication date: August 17, 2017Inventors: Takashi Kawana, Kazuyuki Ishihara, Yuuji Takayama, Hikaru Uchidate, Yoshihiko Tanaka, Hiroyuki Fukuhara, Shuichi Kurokawa
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Patent number: 9696651Abstract: An image-forming apparatus includes a light-irradiation unit configured to move a spot of laser light on a surface of a photosensitive member at a non-constant scanning velocity in a main scanning direction to form a latent image on the photosensitive member, an image data correcting unit configured to correct a length in the main scanning direction of image data by inserting one or more image data pieces into the image data, the number of the image data pieces increasing as the scanning velocity increases, and/or extracting one or more image data pieces from the image data, the number of the image data pieces increasing as the scanning velocity decreases, and a brightness correcting unit configured to correct a brightness of the laser light so that an emission brightness increases as the scanning velocity increases and/or the emission brightness decreases as the scanning velocity decreases.Type: GrantFiled: March 9, 2016Date of Patent: July 4, 2017Assignee: Canon Kabushiki KaishaInventors: Takashi Kawana, Kazuyuki Ishihara, Yuuji Takayama, Hikaru Uchidate, Yoshihiko Tanaka, Hiroyuki Fukuhara, Shuichi Kurokawa
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Publication number: 20170142283Abstract: An optical scanning apparatus includes a deflector for scanningly deflecting a beam; a scanning lens for imaging the beam deflected by the deflector on a surface; a casing for a light source, the deflector and the lens; and an elastic member urging the lens toward the casing along an optical axis. The lens is provided with an abutment at a beam emergent side of the lens, the abutment abutting to the casing, and is provided with a limiting portion at a side opposite from the emergent side, the limiting portion limiting movement in the opposite direction. The elastic member and the limiting portion limits the movement of the lens in the direction opposite to the direction of the lens. When the lens contacts a positioning portion of the casing, a gap is provided between the elastic member and the limiting portion with respect to the direction.Type: ApplicationFiled: November 14, 2016Publication date: May 18, 2017Inventors: Yoshihiko Tanaka, Jun Nagatoshi, Tetsuya Nishiguchi
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Publication number: 20170075251Abstract: A light source device includes a light source configured to emit a laser beam; a lens through which the laser beam emitted from the light source passes; and a holder member for holding the light source and the lens; wherein the holder member is provided with an opening through which the laser beam is outputted; wherein the lens is bonded with the holder member at whole circumference of the opening by an adhesive material without contact with the holder member.Type: ApplicationFiled: September 9, 2016Publication date: March 16, 2017Inventors: Fumihiko Yamaya, Yoshihiko Tanaka
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Patent number: 9581929Abstract: Provided is an optical scanning apparatus, including: an optical deflector having a polygon mirror reflecting a light flux emitted from a light source to carry out scanning, a drive unit rotating the polygon mirror about a rotation shaft, and a board supporting the drive unit; an optical box to which the board is fixed; two holes provided in the optical box, through which two screws fixing the board are inserted, respectively; two bearing surfaces provided on the optical box at positions around the two holes, respectively, the two bearing surfaces supporting the board; and an abutment portion provided on the optical box and abutting against a portion that is prevented from being pressed by the two screws in the board which is sandwiched between the two screws and the two bearing surfaces so as to be fixed to the optical box.Type: GrantFiled: July 31, 2015Date of Patent: February 28, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Jun Nagatoshi, Yoshihiko Tanaka, Hiroyuki Fukuhara, Naoki Matsushita
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Patent number: 9523851Abstract: The light deflection unit including a rotary member having a rotor frame formed of a plate of a metal, and a rotary polygon mirror configured to rotate together with the rotor frame and deflect a light beam emitted from a light source, in which a mass of the rotor frame is largest among masses of a plurality of members forming the rotary member, the mass of the rotor frame is smaller than 3 g, and a thickness of the plate of metal is set within a range in which a stress amplitude of a portion of the rotor frame on which a largest stress is exerted during rotation of the rotor member becomes smaller than a fatigue limit of the metal.Type: GrantFiled: October 29, 2015Date of Patent: December 20, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Akira Nakamura, Yoshihiko Tanaka, Hiroyuki Fukuhara
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Publication number: 20160187806Abstract: An image-forming apparatus includes a light-irradiation unit configured to move a spot of laser light on a surface of a photosensitive member at a non-constant scanning velocity in a main scanning direction to form a latent image on the photosensitive member, an image data correcting unit configured to correct a length in the main scanning direction of image data by inserting one or more image data pieces into the image data, the number of the image data pieces increasing as the scanning velocity increases, and/or extracting one or more image data pieces from the image data, the number of the image data pieces increasing as the scanning velocity decreases, and a brightness correcting unit configured to correct a brightness of the laser light so that an emission brightness increases as the scanning velocity increases and/or the emission brightness decreases as the scanning velocity decreases.Type: ApplicationFiled: March 9, 2016Publication date: June 30, 2016Inventors: Takashi Kawana, Kazuyuki Ishihara, Yuuji Takayama, Hikaru Uchidate, Yoshihiko Tanaka, Hiroyuki Fukuhara, Shuichi Kurokawa
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Publication number: 20160131896Abstract: The light deflection unit including a rotary member having a rotor frame formed of a plate of a metal, and a rotary polygon mirror configured to rotate together with the rotor frame and deflect a light beam emitted from a light source, in which a mass of the rotor frame is largest among masses of a plurality of members forming the rotary member, the mass of the rotor frame is smaller than 3 g, and a thickness of the plate of metal is set within a range in which a stress amplitude of a portion of the rotor frame on which a largest stress is exerted during rotation of the rotor member becomes smaller than a fatigue limit of the metal.Type: ApplicationFiled: October 29, 2015Publication date: May 12, 2016Inventors: Akira Nakamura, Yoshihiko Tanaka, Hiroyuki Fukuhara
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Patent number: 9319553Abstract: An image-forming apparatus includes a light-irradiation unit configured to move a spot of laser light on a surface of a photosensitive member at a non-constant scanning velocity in a main scanning direction to form a latent image on the photosensitive member, an image data correcting unit configured to correct a length in the main scanning direction of image data by inserting one or more image data pieces into the image data, the number of the image data pieces increasing as the scanning velocity increases, and/or extracting one or more image data pieces from the image data, the number of the image data pieces increasing as the scanning velocity decreases, and a brightness correcting unit configured to correct a brightness of the laser light so that an emission brightness increases as the scanning velocity increases and/or the emission brightness decreases as the scanning velocity decreases.Type: GrantFiled: June 1, 2015Date of Patent: April 19, 2016Assignee: Canon Kabushiki KaishaInventors: Takashi Kawana, Kazuyuki Ishihara, Yuuji Takayama, Hikaru Uchidate, Yoshihiko Tanaka, Hiroyuki Fukuhara, Shuichi Kurokawa
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Publication number: 20150365554Abstract: An image-forming apparatus includes a light-irradiation unit configured to move a spot of laser light on a surface of a photosensitive member at a non-constant scanning velocity in a main scanning direction to form a latent image on the photosensitive member, an image data correcting unit configured to correct a length in the main scanning direction of image data by inserting one or more image data pieces into the image data, the number of the image data pieces increasing as the scanning velocity increases, and/or extracting one or more image data pieces from the image data, the number of the image data pieces increasing as the scanning velocity decreases, and a brightness correcting unit configured to correct a brightness of the laser light so that an emission brightness increases as the scanning velocity increases and/or the emission brightness decreases as the scanning velocity decreases.Type: ApplicationFiled: June 1, 2015Publication date: December 17, 2015Inventors: Takashi Kawana, Kazuyuki Ishihara, Yuuji Takayama, Hikaru Uchidate, Yoshihiko Tanaka, Hiroyuki Fukuhara, Shuichi Kurokawa
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Publication number: 20150338768Abstract: Provided is an optical scanning apparatus, including: an optical deflector having a polygon mirror reflecting a light flux emitted from a light source to carry out scanning, a drive unit rotating the polygon mirror about a rotation shaft, and a board supporting the drive unit; an optical box to which the board is fixed; two holes provided in the optical box, through which two screws fixing the board are inserted, respectively; two bearing surfaces provided on the optical box at positions around the two holes, respectively, the two bearing surfaces supporting the board; and an abutment portion provided on the optical box and abutting against a portion that is prevented from being pressed by the two screws in the board which is sandwiched between the two screws and the two bearing surfaces so as to be fixed to the optical box.Type: ApplicationFiled: July 31, 2015Publication date: November 26, 2015Inventors: Jun Nagatoshi, Yoshihiko Tanaka, Hiroyuki Fukuhara, Naoki Matsushita
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Publication number: 20150310506Abstract: To automatically identify, assess, and evaluate a trading card to shorten the classification process and compile a database so that cards are precisely assessed or authenticated or the prices of cards are determined based on the conditions thereof in the used-card market. [Solving Means] Card shops 3a to 3c serve as client departments of a trading card assessment system. They identify and assess cards, view card information, and display informative matters from a main office. The card identification process includes reading a card image, converting characteristics into numerical values, inquiring of a data center about the characteristic values, and displaying the inquiry result. The displayed inquiry result includes card information (card name, series name, or the like) and card trading rates (buying price, selling price). The card assessment process includes comparing the identified card image with the scanned image (detecting stains, scratches, or color fade-out).Type: ApplicationFiled: October 9, 2012Publication date: October 29, 2015Inventors: Ken-ichi SAITO, Yoshihiko TANAKA, Itaru SHIMOYAMA
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Patent number: 9128291Abstract: Provided is an optical scanning apparatus, including: an optical deflector having a polygon mirror reflecting a light flux emitted from a light source to carry out scanning, a drive unit rotating the polygon mirror about a rotation shaft, and a board supporting the drive unit; an optical box to which the board is fixed; two holes provided in the optical box, through which two screws fixing the board are inserted, respectively; two bearing surfaces provided on the optical box at positions around the two holes, respectively, the two bearing surfaces supporting the board; and an abutment portion provided on the optical box and abutting against a portion that is prevented from being pressed by the two screws in the board which is sandwiched between the two screws and the two bearing surfaces so as to be fixed to the optical box.Type: GrantFiled: December 4, 2013Date of Patent: September 8, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Jun Nagatoshi, Yoshihiko Tanaka, Hiroyuki Fukuhara, Naoki Matsushita
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Publication number: 20140160217Abstract: Provided is an optical scanning apparatus, including: an optical deflector having a polygon mirror reflecting a light flux emitted from a light source to carry out scanning, a drive unit rotating the polygon mirror about a rotation shaft, and a board supporting the drive unit; an optical box to which the board is fixed; two holes provided in the optical box, through which two screws fixing the board are inserted, respectively; two bearing surfaces provided on the optical box at positions around the two holes, respectively, the two bearing surfaces supporting the board; and an abutment portion provided on the optical box and abutting against a portion that is prevented from being pressed by the two screws in the board which is sandwiched between the two screws and the two bearing surfaces so as to be fixed to the optical box.Type: ApplicationFiled: December 4, 2013Publication date: June 12, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Jun Nagatoshi, Yoshihiko Tanaka, Hiroyuki Fukuhara, Naoki Matsushita
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Patent number: 7547043Abstract: A passenger protection device may be configured with an airbag including a protection space portion region for alleviating restraint pressure at the time of restraining a passenger, so as to restrain the passenger, regardless of difference in physical build of the passenger on the vehicle seat at the time of expansion and inflation. A determination may be made regarding whether or not a directly seated object on the vehicle seat is a passenger or a child seat based on the tension information from a belt tension sensor. Depending on the outcome of the determination, performance of an airbag or an inflator may be controlled by a control device.Type: GrantFiled: November 17, 2005Date of Patent: June 16, 2009Assignee: Takata CorporationInventors: Akira Kokeguchi, Yoshihiko Tanaka
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Patent number: 7515841Abstract: An image forming apparatus prevents defective fixing of a toner image from occurring and shortens a printout time for a first sheet by determining a start timing for conveying the recording medium to a transferring position of the toner image in accordance with a warm-up state of a fixing unit, a voltage state of a power supply, and an environmental temperature.Type: GrantFiled: October 4, 2006Date of Patent: April 7, 2009Assignee: Canon Kabushiki KaishaInventors: Akira Kato, Akira Hayakawa, Kenichi Ogawa, Hisashi Nakahara, Shinsuke Kobayashi, Yoshihiko Tanaka, Hironori Kato
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Publication number: 20080311827Abstract: A chamfering apparatus for chamfering an outer periphery of a disk-shaped substrate includes a grinding member having a circular hole inside thereof, wherein the hole has a diameter larger than an outer diameter of the substrate. An inner periphery of the grinding member forming the hole is a grinding surface and grinds the outer periphery of the substrate.Type: ApplicationFiled: May 5, 2008Publication date: December 18, 2008Applicant: FUJI ELECTRIC DEVICE TECHNOLOGYInventors: Yoshihiko Tanaka, Norihiko Nakajima, Shinichiro Nishimaki
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Patent number: 7407028Abstract: A safety restraint system for use in a vehicle. The system includes a safety restraint component coupled to a navigational module. The navigational module is adapted to determine a location of the vehicle. The component is adapted to be actuated in response to the determination. The safety restraint component may be a safety belt pretensioner. The component may be adapted to be actuated when the navigational module determines the vehicle has entered or is approaching a zone meeting a predefined criteria.Type: GrantFiled: December 2, 2004Date of Patent: August 5, 2008Assignee: Takata CorporationInventor: Yoshihiko Tanaka
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Publication number: 20070086817Abstract: An image forming apparatus prevents defective fixing of a toner image from occurring and shortens a printout time for a first sheet by determining a start timing for conveying the recording medium to a transferring position of the toner image in accordance with a warm-up state of a fixing unit, a voltage state of a power supply, and an environmental temperature.Type: ApplicationFiled: October 4, 2006Publication date: April 19, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Akira Kato, Akira Hayakawa, Kenichi Ogawa, Hisashi Nakahara, Shinsuke Kobayashi, Yoshihiko Tanaka, Hironori Kato
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Publication number: 20060162985Abstract: A system for predicting and avoiding crashes is disclosed. The system includes one or more sensors for sensing various obstructions, a controller for processing the signals from the sensors to determined whether a collision is predicted, and a monitor and/or an alarm for alerting the driver of any obstructions. The system may also include a transmitter/receiver for receiving information from other vehicles and using that information to either determining whether a crash is predicted or for displaying obstructions which have been identified by the other vehicles.Type: ApplicationFiled: January 20, 2006Publication date: July 27, 2006Inventors: Yoshihiko Tanaka, Eiji Yanagi