Patents by Inventor Akihiro Sawada

Akihiro Sawada 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).

  • Patent number: 10042327
    Abstract: A timepiece has a solar panel including a plurality of solar cells; a dial disposed on the face side of the solar panel and configured to transmit a light; a molding member disposed to the face side of the dial overlapping the outside edge of the dial when seen from the face side of the timepiece; and an opaque light shield disposed on the face side of the dial on the inside side of the molding member; the solar panel having connectors that connect adjacent solar cells in series, and at least part of each connector is covered by the light shield when seen from the face.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: August 7, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Akihiro Sawada, Shuichi Tamura
  • Patent number: 9844126
    Abstract: Provided is a plasma treatment apparatus capable of uniform substrate treatment by correction of unevenness in a plasma density distribution. The apparatus has a configuration such that a substrate is treated with plasma, and an evacuated container is provided with an annular antenna arranged around an outer periphery of the container, and is formed of a power supply container, and a process container where the substrate is placed, which communicates with an internal space of the power supply container. The plasma is generated in the power supply container by radio-frequency power supplied to the antenna. The plasma is diffused into the process container by a magnetic field of solenoid coils arranged around an outer periphery of the antenna. The inclination of the magnetic field is adjusted by an inclination adjustment means for adjusting the inclination of the solenoid coils with respect to the process substrate.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: December 12, 2017
    Assignee: Canon Aneiva Corporation
    Inventors: Masayoshi Ikeda, Kiyotaka Sakamoto, Akihiro Sawada, Yasumi Sago, Masami Hasegawa, Motozo Kurita
  • Publication number: 20170044950
    Abstract: An exhaust purification system can prevent a NH3 slip caused by an excessive injection of urea water, and includes: an SCR that purifies NOx contained in an exhaust gas using ammonia, as a reducing agent, produced from urea water; a urea water injection device that injects the urea water into an exhaust passage upstream from the SCR; an estimated-adsorption-amount calculation unit that calculates an estimated adsorption amount of the ammonia adsorbed in the SCR; an injection control unit that executes an injection control of the urea water injection device based on the estimated adsorption amount; and an estimated-adsorption-amount change unit that changes the estimated adsorption amount used for the injection control into a value increased or decreased by a predetermined amount when a predetermined condition is established that can cause a difference between an actual adsorption amount of the ammonia adsorbed in the SCR and the estimated adsorption amount.
    Type: Application
    Filed: April 16, 2015
    Publication date: February 16, 2017
    Inventors: Masanobu MINEZAWA, Tomoyuki KAMIJYOU, Akihiro SAWADA
  • Publication number: 20170038743
    Abstract: An electronic timepiece improves power generating performance and timepiece appearance. The electronic timepiece has an optically transparent dial 2; a solar panel 25 disposed on the back cover side of the dial 2 and having a power generating portion; and a planar antenna 40 disposed on the back cover side of the dial 2 and located at a position with at least part of the antenna not superimposed in plan view with the power generating portion. The dial 2 has a low transmittance area TL, and a high transmittance area TH with greater transmittance than the low transmittance area TL. The area of the dial 2 not superimposed in plan view with the power generating portion is the low transmittance area TL.
    Type: Application
    Filed: July 26, 2016
    Publication date: February 9, 2017
    Inventor: Akihiro SAWADA
  • Publication number: 20170023915
    Abstract: A timepiece has a solar panel including a plurality of solar cells; a dial disposed on the face side of the solar panel and configured to transmit a light; a molding member disposed to the face side of the dial overlapping the outside edge of the dial when seen from the face side of the timepiece; and an opaque light shield disposed on the face side of the dial on the inside side of the molding member; the solar panel having connectors that connect adjacent solar cells in series, and at least part of each connector is covered by the light shield when seen from the face.
    Type: Application
    Filed: July 13, 2016
    Publication date: January 26, 2017
    Inventors: Akihiro Sawada, Shuichi Tamura
  • Patent number: 9494956
    Abstract: A voltage control unit is configured to: control, in accordance with an output voltage signal and an output current signal, output power of a rectifying unit to a voltage lower than a voltage by which an amount of generated power of a magneto AC generator becomes maximum; control a transformation ratio in accordance with the output voltage signal and the output current signal so as to improve power generation efficiency of the magneto AC generator one of when an rpm variation signal indicates an decelerating state and when the rpm variation signal indicates that a variation in rpm indicates a value smaller than a predetermined constant; and control the transformation ratio so as to decrease the output power of the rectifying unit when the rpm variation signal indicates an accelerating state.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: November 15, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akihiro Sawada, Naoki Itoi
  • Publication number: 20140306681
    Abstract: A voltage control unit is configured to: control, in accordance with an output voltage signal and an output current signal, output power of a rectifying unit to a voltage lower than a voltage by which an amount of generated power of a magneto AC generator becomes maximum; control a transformation ratio in accordance with the output voltage signal and the output current signal so as to improve power generation efficiency of the magneto AC generator one of when an rpm variation signal indicates an decelerating state and when the rpm variation signal indicates that a variation in rpm indicates a value smaller than a predetermined constant; and control the transformation ratio so as to decrease the output power of the rectifying unit when the rpm variation signal indicates an accelerating state.
    Type: Application
    Filed: September 26, 2013
    Publication date: October 16, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akihiro SAWADA, Naoki ITOI
  • Patent number: 8810109
    Abstract: A motor includes a vibrating plate having a projection part to be pressed against a driven member and a piezoelectric material provided on the vibrating plate, wherein a Young's modulus EL in the pressing direction of the vibrating plate and a Young's modulus ES in a direction crossing the pressing direction are different.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: August 19, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Koichi Kamijo, Osamu Miyazawa, Akihiro Sawada, Reiko Nagahama
  • Publication number: 20130313945
    Abstract: A motor includes a vibrating plate having a projection part to be pressed against a driven member and a piezoelectric material provided on the vibrating plate, wherein a Young's modulus EL in the pressing direction of the vibrating plate and a Young's modulus ES in a direction crossing the pressing direction are different.
    Type: Application
    Filed: July 30, 2013
    Publication date: November 28, 2013
    Applicant: Seiko Epson Corporation
    Inventors: Koichi KAMIJO, Osamu MIYAZAWA, Akihiro SAWADA, Reiko NAGAHAMA
  • Patent number: 8525387
    Abstract: A motor includes a vibrating plate having a projection part to be pressed against a driven member and a piezoelectric material provided on the vibrating plate, wherein a Young's modulus EL in the pressing direction of the vibrating plate and a Young's modulus ES in a direction crossing the pressing direction are different.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: September 3, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Koichi Kamijo, Osamu Miyazawa, Akihiro Sawada, Reiko Nagahama
  • Publication number: 20120298303
    Abstract: Provided is a plasma treatment apparatus capable of uniform substrate treatment by correction of unevenness in a plasma density distribution. The apparatus has a configuration such that a substrate is treated with plasma, and an evacuated container is provided with an annular antenna arranged around an outer periphery of the container, and is formed of a power supply container, and a process container where the substrate is placed, which communicates with an internal space of the power supply container. The plasma is generated in the power supply container by radio-frequency power supplied to the antenna. The plasma is diffused into the process container by a magnetic field of solenoid coils arranged around an outer periphery of the antenna. The inclination of the magnetic field is adjusted by an inclination adjustment means for adjusting the inclination of the solenoid coils with respect to the process substrate.
    Type: Application
    Filed: June 15, 2012
    Publication date: November 29, 2012
    Applicant: CANON ANELVA CORPORATION
    Inventors: Masayoshi IKEDA, Kiyotaka SAKAMOTO, Akihiro SAWADA, Yasumi SAGO, Masami HASEGAWA, Motozo KURITA
  • Publication number: 20120248805
    Abstract: A motor includes a vibrating plate having a projection part to be pressed against a driven member and a piezoelectric material provided on the vibrating plate, wherein a Young's modulus EL in the pressing direction of the vibrating plate and a Young's modulus ES in a direction crossing the pressing direction are different.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 4, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Koichi KAMIJO, Osamu MIYAZAWA, Akihiro SAWADA, Reiko NAGAHAMA
  • Patent number: 8098408
    Abstract: A two-dimensional code printing apparatus includes a computer device and a tape printer. A print frame is arranged on a label making work area on an edit display screen displayed on the computer device. A user inputs a text into a text box arranged on the print frame, and then highlights the text to be coded in a two-dimensional code by a mouse, and then one-clicks a two-dimensional code button. Herewith, the text and the two-dimensional code are displayed on the text box. If the user clicks a print button, a label on which both the text and the two-dimensional code printed is printed.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: January 17, 2012
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Akihiro Sawada, Akihiko Niwa, Chitoshi Ito, Minako Ishida, Hideo Ueno
  • Publication number: 20110254632
    Abstract: A voltage-controlled oscillator (VCO) includes an inductor, a fine-adjustment capacitor, and a coarse-adjustment capacitor, and generates an oscillation clock. A frequency divider divides the frequency of the oscillation clock to generate a divided clock. A direct current (DC) voltage supply circuit supplies a DC voltage to a control node, and changes a voltage value of the DC voltage according to a DC value of an oscillation voltage in a coarse-adjustment mode. A frequency-band selection circuit switches a capacitance value of the coarse-adjustment capacitor based on a frequency difference between a reference clock and the divided clock so that an oscillation frequency band of the VCO is set to an oscillation frequency band corresponding to a target frequency in the coarse-adjustment mode. An oscillation control circuit increases or decreases a control voltage according to a phase difference between the reference clock and the divided clock in the fine-adjustment mode.
    Type: Application
    Filed: June 28, 2011
    Publication date: October 20, 2011
    Applicant: PANASONIC CORPORATION
    Inventor: Akihiro SAWADA
  • Publication number: 20100260242
    Abstract: A variable delay circuit (101) generates a plurality of delay signals (D(1), D(2), . . . , D(n)). An output holding circuit (102) receives the plurality of delay signals (D(1), D(2), . . . , D(n)) in synchronization with a transition of a reference signal (Sref). A selector (104) provides an input signal (Sin) to the variable delay circuit (101) in a normal mode, and provides one of the plurality of delay signals (D(1), D(2), . . . , D(n)) to the variable delay circuit (101) in a calibration mode. A frequency measurement circuit (105) counts the number of transitions of one of the plurality of delay signals (D(1), D(2), . . . , D(n)) during a predetermined frequency measurement period. In the calibration mode, a delay-amount calibration circuit (106) adjusts a delay time of the variable delay circuit (101) so that the number of transitions counted by the frequency measurement circuit (105) approaches a target value corresponding to a frequency of the input signal (Sin).
    Type: Application
    Filed: February 16, 2009
    Publication date: October 14, 2010
    Inventors: Katsuaki Abe, Akihiro Sawada, Seiichiro Yoshida
  • Patent number: 7714668
    Abstract: In a PLL circuit including a VCO having a plurality of oscillation frequency bands, a TDC circuit calculates a phase difference between a predetermined reference signal from a fixed frequency divider and a PLL frequency-divided signal from a variable frequency divider. The TDC circuit detects the amount of time by which the phase of the PLL frequency-divided signal leads or lags with respect to that of the reference signal in one cycle of the reference signal, thereby detecting which of the signals has a higher frequency and which has a lower frequency. Therefore, for each oscillation frequency band, the frequency comparison is completed in one cycle of the reference signal, allowing an oscillation frequency band selection circuit to detect an optimum oscillation frequency band corresponding to a predetermined PLL output frequency in a short time.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: May 11, 2010
    Assignee: Panasonic Corporation
    Inventors: Seiichiro Yoshida, Akihiro Sawada
  • Patent number: 7675218
    Abstract: An electronic device comprising a power source, a piezoelectric actuator A, and a drive control apparatus 100 for controlling the driving of the piezoelectric actuator, wherein the drive control apparatus 100 is provided with a drive circuit 111 for supplying a drive signal SDR to the piezoelectric element of the vibrating body 12, a phase difference detection means 120 for detecting the phase difference indicating the vibration state of the vibrating body 12, a comparison voltage setting circuit 133 for correcting the target phase difference to be the target for the vibration state, and a drive frequency setting means 140 for comparing the phase difference with the target phase difference; and the piezoelectric actuator A can be driven with high efficiency independent of the drive voltage by modifying the drive frequency of the drive signal SDR so that the phase difference approaches the target phase difference based on the results of the above comparison.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: March 9, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Takashi Kawaguchi, Akihiro Sawada, Yutaka Yamazaki, Makoto Okeya
  • Patent number: 7671518
    Abstract: Piezoelectric vibrators provided with an electrode that includes a drive electrode and adjustment electrodes formed in advance on part of the electrode; the drive electrode and adjustment electrodes that are initially electrically connected to each other are electrically cutoff and insulated from each other by cutting conductive parts between the drive electrode and adjustment electrodes, or the mutually insulated drive electrode and adjustment electrodes are electrically connected using solder, a wire, or another electrically conductive member, whereby the characteristic frequencies are adjusted.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: March 2, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Akihiro Sawada, Shigeaki Seki, Susumu Kayamori
  • Patent number: 7583564
    Abstract: To provide a piezoelectric actuator whereby impact resistance can be greatly improved without complicating the design or causing a reduction in drive efficiency. When a piezoelectric actuator 31 is incorporated into a main plate 14, an arm part 513 of a vibrator 50 is disposed across from a protrusion 144 via spaces SP1, SP2 having specific dimensions. With the presence of these spaces SP1, SP2, a free end FR moves freely within the spaces SP1, SP2 during driving, but a vibrating part 511 is captured at the free end FR by the protrusion 144 when external impact is applied, and the vibrating part 511 can therefore be prevented from moving beyond the dimensions of the spaces. Resistance against impact from falling can thereby be easily and greatly improved without reducing the drive efficiency, and the usual difficulty of reconciling both drive efficiency and impact resistance can be resolved.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: September 1, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Joji Kitahara, Akihiro Sawada
  • Patent number: RE40709
    Abstract: A piezoactuator has a diaphragm, and the diaphragm has flat piezoelectric elements that oscillate in a longitudinal oscillation mode and a sinusoidal oscillation mode. A first electrode for detecting oscillation in the longitudinal oscillation mode, and a second electrode for detecting the amplitude of oscillation in the sinusoidal oscillation mode, are disposed on the surface of the diaphragm. When the piezoactuator is driven with a drive signal, the phase difference of a first detection signal output from the first electrode and a second detection signal output from the second electrode is detected. The frequency at which the detected phase difference becomes the maximum phase difference is then obtained, and a drive signal of a matching frequency is applied to the piezoelectric elements.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: May 12, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Hidehiro Akahane, Akihiro Sawada, Makoto Furuhata