Patents by Inventor Junichi Suzuki

Junichi Suzuki 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).

  • Discharge lamp driving device, projector, and discharge lamp driving method
    Patent number: 9785041
    Abstract: A discharge lamp driving device includes a discharge lamp driving unit configured to supply a driving current to a discharge lamp including electrodes, a controller configured to control the discharge lamp driving unit, and a voltage detection unit configured to detect an inter-electrode voltage of the discharge lamp, in which the controller controls the discharge lamp driving unit so that the driving current includes a hybrid period in which a first period for supplying an AC current with a first frequency to the discharge lamp and a second period for supplying a DC current to the discharge lamp are alternately repeated, in which the first frequency includes a plurality of different frequencies, and in which the controller changes the first frequency on the basis of at least one of the detected inter-electrode voltage and driving power supplied to the discharge lamp.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: October 10, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Shun Sato, Junichi Suzuki, Satoshi Kito
  • Discharge lamp driver, light source, projector, and method of driving discharge lamp
    Patent number: 9729838
    Abstract: A discharge lamp driver includes a discharge lamp drive unit that supplies a drive current to the discharge lamp, and a control unit that controls the discharge lamp drive unit according to a drive current waveform, wherein the drive current waveform has a mixed frequency drive period including a unit drive period containing a first drive period in which a first drive current is supplied to the discharge lamp and a second drive period provided immediately after the first drive period, in which a second drive current is supplied to the discharge lamp, the first drive current is a half-period alternating current having a frequency higher than 10 Hz and not higher than 300 Hz, the second drive current is an alternating current having a frequency higher than 1000 Hz, and a length of the second drive period is equal to or longer than a length of the first drive period.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: August 8, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Junichi Suzuki, Shun Sato
  • Projector and control method for projector
    Patent number: 9699423
    Abstract: In a projector, a reflection mirror configured to reflect light emitted from a discharge lamp is disposed on a first end of a discharge lamp main body, a first electrode is disposed on the first end side, each of a first AC period and a second AC period alternately includes a first polarity period in which the first electrode serves as an anode and a second polarity period in which a second electrode serves as an anode, a controller causes a period to transition from the first AC period to the second AC period in a case where an input reception unit receives a stop operation on the projector, and an absolute value of a driving current of the second polarity period in the second AC period is greater than an absolute value of the driving current of the second polarity period in the first AC period.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: July 4, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Junichi Suzuki, Toru Terashima
  • Light source apparatus, discharge lamp driving method, and projector
    Patent number: 9642229
    Abstract: In at least one embodiment, a light source apparatus includes a discharge lamp with a pair of electrodes and a driving unit that supplies a driving current to the pair of electrodes. The driving unit includes an AC supplier that supplies an alternating current to the pair of electrodes and a DC supplier that supplies a direct current to the pair of electrodes. The AC supplier is configured to alternately repeat an AC supply section in which the alternating current is supplied and an AC stop section in which the supply of the alternating current is stopped. The DC supplier is configured to supply the direct current during a period corresponding to the AC stop section. A frequency of the direct current is not lower than 10 Hz and not higher than 1 kHz.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: May 2, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Junichi Suzuki, Satoshi Kito
  • Lens apparatus and image pickup apparatus including the same
    Patent number: 9594291
    Abstract: A lens apparatus includes a focus lens, a focus detector, an automatic focusing unit configured to drive the focus lens based on a focus detection result obtained from the focus detector, a focus information output unit configured to output focus information to a display unit capable of displaying the focus information superimposed on a picked up image obtained by picking up an image with use of a light beam from an object, which passes through the lens apparatus, and a display determination unit configured to determine whether or not to display the focus information on the display unit, in which the focus information output unit is configured to output a signal for displaying the focus information to the display unit based on a determination result obtained from the display determination unit.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: March 14, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Junichi Suzuki
  • DISCHARGE LAMP DRIVING DEVICE, PROJECTOR, AND DISCHARGE LAMP DRIVING METHOD
    Publication number: 20170071052
    Abstract: A discharge lamp driving device includes: a discharge lamp driving unit which supplies drive power to a discharge lamp; and a control unit which controls the discharge lamp driving unit according to a waveform of the drive power. The waveform has n launching periods and a low-power mode lighting period. The n launching periods include a first launching period in which the drive power increases toward refresh power that is equal to or above drive power in a low-power mode and equal to or below rated power, and (n?1) launching periods in which the drive power is maintained at the refresh power. The control unit, in an x-th launching period, supplies the discharge lamp with a drive current having a drive frequency equal to or below a drive frequency of a drive current supplied to the discharge lamp in an (x?1)th launching period.
    Type: Application
    Filed: November 18, 2016
    Publication date: March 9, 2017
    Inventors: Yoichi NAKAGOMI, Junichi SUZUKI
  • Lens apparatus and image pickup apparatus including the same
    Patent number: 9591197
    Abstract: A lens apparatus includes: a movable optical member; a driving unit that drives the movable optical member; an operating unit that operates the driving unit; a first controller that derives an input value for operating the driving unit based on an operation amount of the operating unit; a second controller that corrects the input value input from the first controller to calculate a control value and outputs the control value to the driving unit; and a deriving unit that derives a matching position from the control value. When an operation from the operating unit becomes effective, the deriving unit outputs the matching position to the first controller, and the first controller sets the matching position to the input value.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: March 7, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Junichi Suzuki
  • Lens system and image capturing system including the same
    Patent number: 9581788
    Abstract: A lens system includes a lens device including an optical member, and a position detection device including a detection unit that obtains position information regarding the optical member. The position detection device includes a generation unit that generates a connection request signal for requesting the lens device to establish a first communication path between the lens device and the position detection device. The generation unit includes, in the connection request signal, the position information obtained by the detection unit.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: February 28, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Junichi Suzuki
  • Discharge lamp driving device, projector, and discharge lamp driving method
    Patent number: 9563111
    Abstract: A discharge lamp driving device includes: a discharge lamp driving unit which supplies drive power to a discharge lamp having electrodes; a storage unit which stores information with respect to the discharge lamp; and a control unit which controls the discharge lamp driving unit, wherein the control unit is configured to execute a stationary lighting driving in which first drive power is supplied to the discharge lamp and a high-power driving in which second drive power that is higher than the first drive power is supplied to the discharge lamp, and the control unit sets first execution information of the high-power driving on the basis of first information with respect to the high-power driving stored in the storage unit, at a predetermining setting timing, and controls the discharge lamp driving unit according to the first execution information.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: February 7, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yoichi Nakagomi, Junichi Suzuki, Tetsuo Terashima
  • DISCHARGE LAMP, MANUFACTURING METHOD FOR DISCHARGE LAMP, AND PROJECTOR
    Publication number: 20170025266
    Abstract: A discharge lamp includes a luminous tube and a pair of electrodes. At least one of the pair of electrodes includes a core material, a coil section in which a metal wire is wound on the core material in three or more layers, a distal end portion made of a conductor and provided, with respect to the coil section, at an end portion of the core material on a side where the other electrode is disposed, and a rear end portion made of a conductor and provided on the opposite side of the distal end portion with respect to the coil section. The rear end portion includes a first diameter section having a first diameter and a second diameter section having a second diameter smaller than the first diameter and present in a position farther from the coil section than the first diameter section.
    Type: Application
    Filed: July 8, 2016
    Publication date: January 26, 2017
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Junichi SUZUKI
  • Light source drive device, display apparatus, and light source drive method
    Patent number: 9538627
    Abstract: A light source drive device includes a supply unit that supplies a high-frequency first drive signal and a second drive signal whose frequency is lower than a frequency of the first drive signal to a discharge lamp which has a pair of electrodes, and a control unit that controls the supply unit so that the first drive signal and the second drive signal of fixed durations are alternately supplied and that controls the supply unit so that the first drive signal is supplied in a case where a voltage between the pair of electrodes is below a threshold.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: January 3, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Junichi Suzuki
  • Discharge lamp driving device, projector, and discharge lamp driving method
    Patent number: 9532439
    Abstract: A discharge lamp driving device includes: a discharge lamp driving unit which supplies drive power to a discharge lamp; and a control unit which controls the discharge lamp driving unit according to a waveform of the drive power. The waveform has n launching periods and a low-power mode lighting period. The n launching periods include a first launching period in which the drive power increases toward refresh power that is equal to or above drive power in a low-power mode and equal to or below rated power, and (n?1) launching periods in which the drive power is maintained at the refresh power. The control unit, in an x-th launching period, supplies the discharge lamp with a drive current having a drive frequency equal to or below a drive frequency of a drive current supplied to the discharge lamp in an (x?1)th launching period.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: December 27, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yoichi Nakagomi, Junichi Suzuki
  • Light source apparatus, discharge lamp driving method, and projector
    Patent number: 9526157
    Abstract: A light source apparatus includes a discharge lamp including a light-emitting container having a cavity in which a discharge medium is enclosed, and a pair of electrodes disposed such that respective tip portions thereof oppose each other in the cavity, and a driving unit that supplies a driving current to the pair of electrodes. The driving current is generated by modulating amplitude of alternating current having a frequency not lower than 1 kHz and not higher than 10 GHz, such that a first section and a second section in which the amplitude is smaller than in the first section are alternately repeated.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: December 20, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Junichi Suzuki, Satoshi Kito
  • DISCHARGE LAMP DRIVING DEVICE, PROJECTOR, AND DISCHARGE LAMP DRIVING METHOD
    Publication number: 20160360600
    Abstract: A discharge lamp driving device according to one aspect of the invention includes a discharge lamp driving section configured to supply a driving current to a discharge lamp including electrodes and a control section configured to control the discharge lamp driving section. The control section controls the discharge lamp driving section such that a mixed period is provided in which a first period in which an alternating current having a first frequency is supplied to the discharge lamp and a second period in which a direct current is supplied to the discharge lamp are alternately repeated. The first frequency includes a plurality of frequencies different from one another. The control section temporally changes the length of the first period.
    Type: Application
    Filed: May 31, 2016
    Publication date: December 8, 2016
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Shun SATO, Junichi SUZUKI, Satoshi KITO
  • Discharge lamp driving device, projector, and discharge lamp driving method
    Patent number: 9509965
    Abstract: A discharge lamp driving device includes: a discharge lamp driving unit which supplies drive power to a discharge lamp; and a control unit which controls the discharge lamp driving unit. The control unit is configured to execute a first driving in which first drive power is supplied to the discharge lamp and a second driving in which second drive power that is equal to or higher than the first drive power and equal to or lower than rated power of the discharge lamp is supplied to the discharge lamp. The control unit executes the second driving in a launching period of the discharge lamp, and adjusts a heat load applied to the discharge lamp in the second driving executed in the launching period, according to a degree of deterioration of the discharge lamp.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: November 29, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yoichi Nakagomi, Junichi Suzuki, Tetsuo Terashima
  • Driving device and driving method for discharge lamp, light source device, and projector
    Patent number: 9491839
    Abstract: A light source device includes a discharge lamp including a pair of electrodes arranged to be opposed to each other in a hollow section in which a discharge medium is encapsulated and a driving device. The driving device includes a supplying unit configured to supply an alternating current having a frequency higher than 1 kHz to the pair of electrodes in a high-frequency period and a control unit configured to set at least a first frequency higher than 1 kHz and a second frequency higher than 1 kHz and different from the first frequency as the frequency of the alternating current, switch an alternating current having the first frequency and an alternating current having the second frequency in the high-frequency period, and control the supplying unit to repeat the high-frequency period to supply an alternating current to the pair of electrodes.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: November 8, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Junichi Suzuki, Satoshi Kito, Norio Imaoka
  • DISCHARGE LAMP DRIVING DEVICE, PROJECTOR, AND DISCHARGE LAMP DRIVING METHOD
    Publication number: 20160320693
    Abstract: A discharge lamp driving device includes a discharge lamp driving unit configured to supply a driving current to a discharge lamp including electrodes, a controller configured to control the discharge lamp driving unit, and a voltage detection unit configured to detect an inter-electrode voltage of the discharge lamp, in which the controller controls the discharge lamp driving unit so that the driving current includes a hybrid period in which a first period for supplying an AC current with a first frequency to the discharge lamp and a second period for supplying a DC current to the discharge lamp are alternately repeated, in which the first frequency includes a plurality of different frequencies, and in which the controller changes the first frequency on the basis of at least one of the detected inter-electrode voltage and driving power supplied to the discharge lamp.
    Type: Application
    Filed: April 26, 2016
    Publication date: November 3, 2016
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Shun SATO, Junichi SUZUKI, Satoshi KITO
  • PROJECTOR AND CONTROL METHOD FOR PROJECTOR
    Publication number: 20160261833
    Abstract: In a projector, a reflection mirror configured to reflect light emitted from a discharge lamp is disposed on a first end of a discharge lamp main body, a first electrode is disposed on the first end side, each of a first AC period and a second AC period alternately includes a first polarity period in which the first electrode serves as an anode and a second polarity period in which a second electrode serves as an anode, a controller causes a period to transition from the first AC period to the second AC period in a case where an input reception unit receives a stop operation on the projector, and an absolute value of a driving current of the second polarity period in the second AC period is greater than an absolute value of the driving current of the second polarity period in the first AC period.
    Type: Application
    Filed: February 24, 2016
    Publication date: September 8, 2016
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Junichi SUZUKI, Toru TERASHIMA
  • Discharge lamp driving device, light source device, projector, and discharge lamp driving method
    Patent number: 9398275
    Abstract: A discharge lamp driving device includes: a discharge lamp driving unit that supplies a driving current for driving a discharge lamp to the discharge lamp; and a control unit that controls the discharge lamp driving unit. The control unit controls the discharge lamp driving unit such that the driving current having driving periods is supplied to the discharge lamp, the driving period including: a mixing period which alternately has an AC period in which an alternating current is supplied to the discharge lamp and a first DC period in which a direct current is supplied to the discharge lamp and a second DC period which is provided immediately after the mixing period and in which a direct current having a polarity which is opposite to that of the direct current in the first DC period is supplied to the discharge lamp.
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: July 19, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Junichi Suzuki, Yoichi Nakagomi
  • Light source, projector, and method of cooling discharge lamp
    Patent number: 9395610
    Abstract: A light source includes a discharge lamp that outputs light, a discharge lamp driver that supplies drive power to the discharge lamp, a cooling unit that cools the discharge lamp, and a control unit that controls the cooling unit, and the control unit controls the cooling unit based on control information representing a relationship a rotation speed of the cooling unit between at least one of temperature information of the discharge lamp and a voltage between electrodes of the discharge lamp.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: July 19, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Junichi Suzuki, Yasuhiro Toba, Tetsuo Terashima