Patents by Inventor Yasuhiro Matsui

Yasuhiro Matsui 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).

  • Method for setting operation condition of press line
    Patent number: 8434405
    Abstract: A method for setting an operation condition of a press line includes a conveyance route setting step of setting a conveyance route so as to minimize a clearance between a work and a lower die; a phase difference setting step of setting a phase difference between conveying operations of respective conveyance machines so as to minimize a clearance between a work to be taken-out and a work to be taken-in; and a press-conveyance phase difference setting step that sets a phase difference between pressing operation and conveyance operation in accordance with the conveying route set for each conveyance machine, the phase difference between the conveyance machines, a line SPH, and a press SPH.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: May 7, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasuhiro Matsui, Tatsuya Sato, Yoshihiro Kageyama, Koji Ikohagi, Hiroyuki Nobuta
  • DELAY LINE INTERFEROMETER MULTIPLEXER
    Publication number: 20120281234
    Abstract: In an embodiment, a delay line interferometer (DLI) multiplexer (MUX) includes a first stage and a second stage. The first stage includes a first DLI and a second DLI. The first DLI includes a first left input, a first right input, and a first output and has a free spectral range (FSR) that is about four times a nominal channel spacing. The second DLI includes a second left input, a second right input, and a second output and has an FSR that is about four times the nominal channel spacing. The second stage is coupled to the first stage and includes a third DLI. The third DLI includes a third left input optically coupled to the first output, a third right input optically coupled to the second output, and a third output. An FSR of the third DLI is about two times the nominal channel spacing.
    Type: Application
    Filed: May 3, 2012
    Publication date: November 8, 2012
    Applicant: FINISAR CORPORATION
    Inventors: Yasuhiro Matsui, Bernd Huebner, Charles B. Roxlo
  • DBR laser with improved thermal tuning efficiency
    Patent number: 8236590
    Abstract: A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the waveguide along a substantial portion of the length thereof. The waveguide may have a grating formed therein. A heating element is in thermal contact with the waveguide and electrically coupled to a controller configured to adjust optical properties of the waveguide by controlling power supplied to the heating element.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: August 7, 2012
    Assignee: Finisar Corporation
    Inventors: Yasuhiro Matsui, Kevin J. McCallion, Parviz Tayebati
  • DBR laser with improved thermal tuning efficiency
    Patent number: 8236589
    Abstract: A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the waveguide along a substantial portion of the length thereof. The waveguide having a grating formed therein. A heating element is in thermal contact with the waveguide and electrically coupled to a controller electrically configured to adjust optical properties of the waveguide by controlling power supplied to the heating element.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: August 7, 2012
    Assignee: Finisar Corporation
    Inventors: Yasuhiro Matsui, Kevin J. McCallion, Parviz Tayebati
  • Granular preparation containing biguanide compound
    Patent number: 8192761
    Abstract: A granular preparation containing a biguanide compound and a solidification-preventive agent does not solidify during storage and can avoid the difficulty in dosing.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: June 5, 2012
    Assignee: Dainippon Sumitomo Pharma Co., Ltd.
    Inventors: Yasushi Ochiai, Yasuhiro Matsui
  • Ink jet printer
    Patent number: 8075109
    Abstract: An inkjet printer, comprises a plurality of recording heads to jet ink onto a recording medium; an ink distributing device to distribute ink to the plurality of recording heads and having a damping action to the ink, the ink distributing device including, an ink chamber to store ink therein, an inlet section having an ink inlet port through which ink is fed from an outside into the ink chamber, and an outlet section having a plurality of ink outlet ports through which ink is discharged from the ink chamber; and a plurality of supplying pipes to distribute ink from the plurality of outlet ports to the plurality of recording heads.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: December 13, 2011
    Assignee: Konica Minolta IJ Technologies, Inc.
    Inventors: Yasuhiro Matsui, Takeshi Urakami
  • METHOD FOR SETTING OPERATION CONDITION OF PRESS LINE
    Publication number: 20110239875
    Abstract: Provided is a method for setting an operation condition of a press line to improve a production cycle. A method for setting an operation condition of a press line includes a conveyance route setting step (S4) of setting a conveyance route so as to minimize a clearance between a work and a lower die; a phase difference setting step (S7) of setting a phase difference between conveying operations of respective conveyance machines so as to minimize a clearance between a work to be taken-out and a work to be taken-in; and a press-conveyance phase difference setting step (S11) that sets a phase difference between pressing operation and conveyance operation in accordance with the conveying route set for each conveyance machine, the phase difference between the conveyance machines, a line SPM, and a press SPM.
    Type: Application
    Filed: September 14, 2009
    Publication date: October 6, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Yasuhiro Matsui, Tatsuya Sato, Yoshihiro Kageyama, Koji Ikohagi, Hiroyuki Nobuta
  • WDM PON based on DML
    Patent number: 7991291
    Abstract: Low-cost FP lasers can be implemented in the upstream links of a WDM PON system by configuring them for single-mode operation. In a typical embodiment, an FP laser at a subscriber unit is injection seeded with CW seed light from a DFB laser or an ASE source at a central office to enable single-mode operation of the FP laser. The FP laser is directly modulated and the resulting optical data signal is transmitted upstream to the central office. At the central office, an optical spectrum reshaper/bandpass optical filter is positioned in front of an optical receiver to enhance the extinction ratio of the optical data signal and generate a vestigial sideband. A wavelength locker can also be implemented at the central office to stabilize the wavelength of the master DFB laser and the injection-seeded FP laser.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: August 2, 2011
    Assignee: Finisar Corporation
    Inventors: Yasuhiro Matsui, Kevin McCallion
  • Chirped laser with passive filter element for differential phase shift keying generation
    Patent number: 7991297
    Abstract: A method for generating D-N-PSK optical signals is disclosed wherein a laser is modulated to generate optical signal pairs including phase modulated and fixed phase portions, the phase modulated portions having a frequency encoding one or more data symbols and the fixed phase portion having a carrier frequency and a phase corresponding to the immediately preceding phase modulated portion. The output of the laser is passed through an optical spectrum reshaper having a transmission function chosen to attenuate a plurality of the phase modulated portions relative to the fixed phase portions. The phase modulated portions may have N frequency levels located on either side of the carrier frequency. One of the N frequency levels may be equal to the carrier frequency.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: August 2, 2011
    Assignee: Finisar Corporation
    Inventors: Daniel Mahgerefteh, Xueyan Zheng, Yasuhiro Matsui, Parviz Tayebati, Andrew C Singer
  • Optical transmitter having a widely tunable directly modulated laser and periodic optical spectrum reshaping element
    Patent number: 7962045
    Abstract: An optical transmitter is disclosed including a widely tunable laser coupled to a periodic optical spectrum reshaper (OSR) to convert frequency modulated pulses from the laser into amplitude modulated pulses. The laser is tuned to generate pulses corresponding to passbands of the OSR spanning a wide range of frequencies. The laser includes a gain section having an optical path length substantially shorter than the total optical path length of the laser. The laser may be a Y-branch laser having reverse-biased sampled gratings or ring resonator filters tuned by stripe heaters. The laser may also include a reflective external cavity section tunable by modulating the temperature of ring resonators or etalons. The OSR may be integrally formed with the external cavity of the ECL laser.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: June 14, 2011
    Assignee: Finisar Corporation
    Inventors: Kevin John McCallion, Yasuhiro Matsui, Daniel Mahgerefteh
  • Integral phase rule for reducing dispersion errors in an adiabatically chirped amplitude modulated signal
    Patent number: 7941057
    Abstract: An optical transmitter is disclosed for transmitting a signal along a dispersive medium to a receiver. The optical transmitter generates adiabatically chirped profile having an initial pulse width and frequency excursion chosen such that high frequency data sequences include one bits that interfere destructively at a middle point of an intervening zero bit upon arrival at the receiver.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: May 10, 2011
    Assignee: Finisar Corporation
    Inventors: Daniel Mahgerefteh, Parviz Tayebati, Xueyan Zheng, Yasuhiro Matsui
  • Optical FM source based on intra-cavity phase and amplitude modulation in lasers
    Patent number: 7907648
    Abstract: A laser is disclosed including a gain section having a distributed feedback grating imposed thereon. An absorption section is embedded in the gain section such that the first and second portions of the distributed feedback grating extend on either side of the electro-absorption section. A controller imposes a substantially DC bias signal on the first and second gain electrodes and imposes a modulation signal encoding digital data on the modulation electrode to generate a frequency modulated signal. In some embodiments, the first and second portions are biased above the lasing threshold and the absorption section is modulated below the lasing threshold to modulate loss in the absorption section.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: March 15, 2011
    Assignee: Finisar Corporation
    Inventors: Yasuhiro Matsui, Kevin J. McCallion, Parviz Tayebati
  • TRANSFER APPARATUS
    Publication number: 20110011703
    Abstract: A transfer apparatus which performs long-distance transfer at a high speed, while preventing dimensions of the apparatus from increasing. Specifically, a transfer apparatus transfers a work to a pressing machine The transfer apparatus is provided with a base section, a follower arm, which is connected to the base section on the base-section end side such that the follower arm can rotate and vertically slide, and a first driving arm which is rotatably connected to the base section on the base-section end side. The transfer apparatus also includes a driving arm, which is rotatably connected to the first driving arm on the base-section end side and rotatably connected to the follower arm on the leading end side, and a holding apparatus arranged on the leading end side of the follower arm for holding the work.
    Type: Application
    Filed: March 2, 2009
    Publication date: January 20, 2011
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Yoshihiro Kageyama, Hiroyuki Nobuta, Yasuhiro Matsui, Tatsuya Sato
  • Directly modulated laser with isolated modulated gain electrode for improved frequency modulation
    Patent number: 7869473
    Abstract: A DBR laser, such as a semiconductor DBR laser is disclosed having improved frequency modulation performance. The laser includes a split gain electrode and a tuning electrode. A modulating current encoding a data signal is injected into a first section of the gain electrode whereas a substantially DC bias voltage is imposed on a second section of the gain electrode positioned between the first gain electrode and the tuning electrode. The first and second gain electrodes are electrically isolated from each other and the tuning electrode by a large isolation resistance. In some embodiments, the isolation resistance is generated by forming the electrodes on a P+ layer and removing portions of the P+ layer between adjacent electrodes. Capacitors may couple to one or both of the second gain electrode and the tuning electrode.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: January 11, 2011
    Assignee: Finisar Corporation
    Inventors: Xiong Ye, Hongmin Chen, Yasuhiro Matsui, Daniel Mahgerefteh
  • Optical FM source based on intra-cavity phase and amplitude modulation in lasers
    Patent number: 7860404
    Abstract: An optical transmitter is discloses having a gain section and a phase section. The phase section is modulated to generate a frequency modulated signal encoding data. The frequency modulated signal is transmitted through an optical spectrum reshaper operable to convert it into a frequency and amplitude modulated signal. In some embodiments, a driving circuit is coupled to the phase and gain sections is configured to simultaneously modulate both the phase and gain sections such that the first signal is both frequency and amplitude modulated.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: December 28, 2010
    Assignee: Finisar Corporation
    Inventors: Yasuhiro Matsui, Kevin McCallion, Daniel Mahgerefteh, Xueyan Zheng, Parviz Tayebati
  • DBR Laser with Improved Thermal Tuning Efficiency
    Publication number: 20100311195
    Abstract: A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the waveguide along a substantial portion of the length thereof. The waveguide may have a grating formed therein. A heating element is in thermal contact with the waveguide and electrically coupled to a controller configured to adjust optical properties of the waveguide by controlling power supplied to the heating element.
    Type: Application
    Filed: August 16, 2010
    Publication date: December 9, 2010
    Applicant: FINISAR CORPORATION
    Inventors: Yasuhiro Matsui, Kevin J. McCallion, Parviz Tayebati
  • MEMORY CONTROLLING DEVICE AND MEMORY CONTROLLING METHOD
    Publication number: 20100281232
    Abstract: Disclosed herein is a memory controlling device including: an address converting section configured to convert a logical address included in a request issued from a plurality of clients into a physical address of a memory; a request dividing section configured to divide a converted request converted by the address converting section by a command unit for the memory on a basis of the physical address of the converted request; and an arbitrating section configured to perform arbitration on a basis of the physical address indicated in a divided request output from the request dividing section.
    Type: Application
    Filed: April 23, 2010
    Publication date: November 4, 2010
    Inventors: Satoshi TAKAGI, Yasuhiro MATSUI, Masao TANAKA, Takahiro IKARASHI, Akihiko SAOTOME, Hiroshi SUMIHIRO, Yukinao KENJO
  • DBR LASER WITH IMPROVED THERMAL TUNING EFFICIENCY
    Publication number: 20100279447
    Abstract: A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the waveguide along a substantial portion of the length thereof. The waveguide having a grating formed therein. A heating element is in thermal contact with the waveguide and electrically coupled to a controller electrically configured to adjust optical properties of the waveguide by controlling power supplied to the heating element.
    Type: Application
    Filed: July 19, 2010
    Publication date: November 4, 2010
    Applicant: FINISAR CORPORATION
    Inventors: Yasuhiro Matsui, Kevin J. McCallion, Parviz Tayebati
  • Chirp-managed, electroabsorption-modulated laser
    Patent number: 7809280
    Abstract: An optical transmitter comprising: an optical source modulated with an input digital data signal so as to generate a first, frequency-modulated digital signal; and an amplitude modulator, modulated with the logical inverse of the input digital data signal, for receiving the first, frequency-modulated signal and generating a second, amplitude-modulated and frequency-modulated digital signal; wherein the optical source and the amplitude modulator are each configured so as to produce positive transient chirp.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: October 5, 2010
    Assignee: Finisar Corporation
    Inventors: Daniel Mahgerefteh, Yasuhiro Matsui, Xueyan Zheng, Bart Johnson, Duncan J W Walker, Parviz Tayebati
  • DBR laser with improved thermal tuning efficiency
    Patent number: 7778295
    Abstract: A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the waveguide along a substantial portion of the length thereof. The waveguide may have a grating formed therein. A heating element is in thermal contact with the waveguide and electrically coupled to a controller configured to adjust optical properties of the waveguide by controlling power supplied to the heating element.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: August 17, 2010
    Assignee: Finisar Corporation
    Inventors: Yasuhiro Matsui, Kevin J. McCallion, Parviz Tayebati