Patents by Inventor Kazunari Fujii

Kazunari Fujii 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).

  • Publication number: 20140002549
    Abstract: A semiconductor device including segments, a power supply pad and conductive patterns is provided. Each segment includes driving units for discharging a liquid. Each driving unit includes a driving circuit and an element driven by the driving circuit to apply discharging energy to the liquid. The conductive pattern includes a first conductive portion connected to the power supply pad, a second rectangular conductive portion, a third conductive portion connected to the driving portions, and a connection portion which connects the second and third conductive portions. These conductive portions elongate in a first direction. In a second direction, a length of the second conductive portion is larger than a length of the first conductive portion. The second conductive portion is connected to the first conductive portion at a first corner and the connection portion at a second corner diagonal to the first corner.
    Type: Application
    Filed: September 6, 2013
    Publication date: January 2, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Kazunari Fujii
  • Patent number: 8562111
    Abstract: A semiconductor device including segments, a power supply pad and conductive patterns is provided. Each segment includes driving units for discharging a liquid. Each driving unit includes a driving circuit and an element driven by the driving circuit to apply discharging energy to the liquid. The conductive pattern includes a first conductive portion connected to the power supply pad, a second rectangular conductive portion, a third conductive portion connected to the driving units, and a connection portion which connects the second and third conductive portions. These conductive portions are elongated in a first direction. In a second direction, a length of the second conductive portion is greater than a length of the first conductive portion. The second conductive portion is connected to the first conductive portion at a first corner and to the connection portion at a second corner diagonal to the first corner.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: October 22, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazunari Fujii
  • Patent number: 8472096
    Abstract: A method of manufacturing an oscillator device having first and second oscillators being driven at first and second driving resonance frequencies gf1 and gf2, the method including a first step for processing the two oscillators, wherein, when the two oscillators are going to be processed as oscillators having first and second resonance frequencies different from the two driving resonance frequencies with a certain dispersion range, the two oscillators are so processed that the first and second resonance frequencies different from the two driving resonance frequencies become equal to first and second resonance frequencies f1 and f2, respectively, which are included in adjustable resonance frequency ranges, respectively, and a second step for adjusting the first and second resonance frequencies f1 and f2 so that they become equal to the first and second driving resonance frequencies gf1 and gf2, respectively.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: June 25, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Takahisa Kato, Yoshio Hotta, Suguru Miyagawa, Takahiro Akiyama
  • Patent number: 8412075
    Abstract: A light deflector device includes a light deflector having an oscillation system, a driving unit for driving the oscillation system and a drive controlling unit for supplying a drive signal. The oscillation system simultaneously generates a first oscillating motion of a first frequency and a second oscillating motion of a second frequency. The drive controlling unit supplies a drive signal formed by synthetically combining a first signal having the first frequency and a second signal having the second frequency to the driving unit and, at the same time, another drive signal for changing at least the amplitude of the first oscillating motion, the amplitude of second oscillating motion or the relative phase difference of the first oscillating motion and the second oscillating motion to the driving unit in order to correct an offset of scanning light deflected by the light deflector.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: April 2, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takahiro Akiyama, Kazunari Fujii, Yukio Furukawa, Shinichiro Iimura
  • Patent number: 8400698
    Abstract: Disclosed is an oscillator device that includes an oscillating system having a first oscillator, a second oscillator, a first torsion spring for connecting the first and second oscillators each other, and a second torsion spring being connected to the second oscillator and having a common torsional axis with the first torsion spring; a supporting system for supporting the oscillating system; a driving system for driving the oscillating system so that at least one of the first and second oscillators produces oscillation as can be expressed by an equation that contains a sum of a plurality of time functions; a signal producing system for producing an output signal corresponding to displacement of at least one of the first and second oscillators; and a drive control system for controlling the driving system on the basis of the output signal of the signal producing system so that at least one of amplitude and phase of the time function takes a predetermined value.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: March 19, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Yukio Furukawa, Takahiro Akiyama, Ryuhei Shoji, Soichiro Suzuki, Shimpei Matsuo, Tatsuya Hotogi, Shinichiro Iimura
  • Patent number: 8345339
    Abstract: The optical deflector includes a deflector, a vibration detector, a driving signal generator, a modulation timing signal generator, and a deflection detector. The deflector has a vibrational system having a movable body with a light deflecting member, and deflects light from a light source by the movable body. The vibration detector detects the vibration condition of the vibrational system of the deflector. The driving signal generator generates a driving signal for driving the vibrational system of the deflector. The modulation timing signal generator generates a modulation timing signal as the reference time for regulating the amount of light from the light source. The deflection detector detects the deflection condition of light deflected by the deflector.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: January 1, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Kandori, Masao Majima, Kazunari Fujii
  • Patent number: 8305674
    Abstract: A method of manufacturing an oscillator device having an oscillator supported relative to a fixed member by a torsion spring for oscillation around a torsion axis and arranged to be driven at a resonance frequency, which method includes a first step for determining an assumed value of an inertia moment weight of the oscillator, a second step for measuring the resonance frequency, a third step for calculating a spring constant of the torsion spring, from the assumed value of the inertia moment weight and the measured resonance frequency obtained at said first and second steps, a fourth step for calculating an adjustment amount for the inertia moment of the oscillator or for the spring constant of the torsion spring, based on the spring constant calculated at said third step and a target resonance frequency determined with respect to the resonance frequency of the oscillator, so as to adjust the resonance frequency to the target resonance frequency, and a fifth step for adjusting the resonance frequency of the
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: November 6, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Suguru Miyagawa, Takahiro Akiyama, Kazutoshi Torashima, Takahisa Kato, Kazunari Fujii
  • Patent number: 8270057
    Abstract: An oscillator device including an oscillation system with oscillators and torsion springs, a driving member for driving the oscillation system, and a drive control member for supplying a driving signal to the driving member, the oscillation system having at least a first oscillation mode and a second oscillation mode, the second oscillation mode having an angular frequency approximately n-fold the angular frequency of the first oscillation mode where n is an integer, the driving member driving the oscillation system so that it simultaneously oscillates in the first and second oscillation modes, wherein a natural angular frequency calculating member calculates the natural angular frequency of the second oscillation mode based on an output signal from a photodetector, being outputted at a timing whereat the reflection light passes over the photodetector.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: September 18, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Suguru Miyagawa
  • Patent number: 8256302
    Abstract: A capacitive electro-mechanical transducer includes a cell, the cell including a first electrode and a second electrode that is disposed opposite the first electrode with a gap therebetween; and a pressure-adjusting unit for adjusting pressure in the gap.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: September 4, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Yoshitaka Zaitsu
  • Publication number: 20120163124
    Abstract: Provided is an ultrasonic detection device including: a capacitive electromechanical transducer including a cell that includes a first electrode and a second electrode disposed so as to oppose with a space; a voltage source for developing a potential difference between the first electrode and the second electrode; and an electric circuit for converting a current, which is caused by a change in electrostatic capacitance between the first electrode and the second electrode due to vibration of the second electrode, into a voltage, in which the capacitive electromechanical transducer provides an output current with a high-pass characteristic having a first cutoff frequency with respect to a frequency, the electric circuit provides an output with a low-pass characteristic having a second cutoff frequency with respect to the frequency, and the second cutoff frequency is smaller than the first cutoff frequency.
    Type: Application
    Filed: October 28, 2010
    Publication date: June 28, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takahiro Akiyama, Makoto Takagi, Kazunari Fujii, Hidemasa Mizutani
  • Publication number: 20120146454
    Abstract: A technology that makes it possible to adjust, through processing, an output signal sent from a capacitive electromechanical transducer apparatus such as a CMUT upon reception of an elastic wave is provided. A capacitive electromechanical transducer apparatus 100 includes cells 102 that include a first electrode 104 and second electrodes 106, each of which is disposed so as to be opposite the first electrode 104 with a cavity 105 therebetween. In the capacitive electromechanical transducer apparatus 100, at least one of the cells 102 includes a processed unit on which at least either addition of a material or removal of a material is performed as processing.
    Type: Application
    Filed: August 5, 2010
    Publication date: June 14, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kazunari Fujii, Takahiro Akiyama, Ayako Kato
  • Patent number: 8159734
    Abstract: An oscillator device includes a supporting member, an oscillation system having plural oscillators and plural torsion springs, a driving device for oscillating the oscillation system, a drive control device for controlling the driving device, an oscillation detecting device for detecting a state of oscillation of an oscillator of the oscillation system, a resonance frequency calculating device for calculating a resonance frequency of the oscillation system based on an output of the oscillation detecting device, and a control parameter adjusting device for adjusting a control parameter of the drive control device, wherein the control parameter adjusting device adjusts a control parameter based on an output of the resonance frequency calculating device.
    Type: Grant
    Filed: September 1, 2008
    Date of Patent: April 17, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Suguru Miyagawa
  • Publication number: 20110292105
    Abstract: A semiconductor device including segments, a power supply pad and conductive patterns is provided. Each segment includes driving units for discharging a liquid. Each driving unit includes a driving circuit and an element driven by the driving circuit to apply discharging energy to the liquid. The conductive pattern includes a first conductive portion connected to the power supply pad, a second rectangular conductive portion, a third conductive portion connected to the driving units, and a connection portion which connects the second and third conductive portions. These conductive portions are elongated in a first direction. In a second direction, a length of the second conductive portion is greater than a length of the first conductive portion. The second conductive portion is connected to the first conductive portion at a first corner and to the connection portion at a second corner diagonal to the first corner.
    Type: Application
    Filed: May 12, 2011
    Publication date: December 1, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Kazunari Fujii
  • Publication number: 20110198966
    Abstract: A capacitive electromechanical transducer has at least one cell. The cell includes a first electrode, a movable vibrating portion including a second electrode disposed opposite the first electrode with a space therebetween, and a supporting portion that supports the vibrating portion. In order to regulate the strength of a border portion between the vibrating portion and the supporting portion, a strength regulating portion is provided.
    Type: Application
    Filed: February 11, 2011
    Publication date: August 18, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kazunari Fujii, Takahiro Akiyama, Hidemasa Mizutani
  • Publication number: 20110116145
    Abstract: A method of manufacturing an oscillator device having first and second oscillators being driven at first and second driving resonance frequencies gf1 and gf2, the method including a first step for processing the two oscillators, wherein, when the two oscillators are going to be processed as oscillators having first and second resonance frequencies different from the two driving resonance frequencies with a certain dispersion range, the two oscillators are so processed that the first and second resonance frequencies different from the two driving resonance frequencies become equal to first and second resonance frequencies f1 and f2, respectively, which are included in adjustable resonance frequency ranges, respectively, and a second step for adjusting the first and second resonance frequencies f1 and f2 so that they become equal to the first and second driving resonance frequencies gf1 and gf2, respectively.
    Type: Application
    Filed: November 13, 2008
    Publication date: May 19, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kazunari Fujii, Takahisa Kato, Yoshio Hotta, Suguru Miyagawa, Takahiro Akiyama
  • Patent number: 7933057
    Abstract: An oscillation system includes first and second oscillation movable elements supported by respective elastic supporting elements. The oscillation system has a first natural oscillation mode of a resonance frequency f1 and a second natural oscillation mode of a resonance frequency of f2 which is approximately N-fold of f1 where N is a natural number. A control device determines set driving frequencies Df1 and Df2 in accordance with a predetermined equation while satisfying a relation Df2=N×Df1 and drives the oscillation system at the set driving frequencies through a driving member.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: April 26, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Takahiro Akiyama
  • Patent number: 7924490
    Abstract: An oscillator device includes an oscillation system having a first oscillator, a second oscillator, a first resilient supporting member and a second resilient supporting member, wherein the oscillation system has at least two frequencies of natural oscillation mode around the torsion axis which include a first resonance frequency f1 and a second resonance frequency f2, wherein there is a relationship that f2 is approximately two-fold of f1, wherein ?f which is expressed as ?f=f2?f×f1 has a relationship of ?f<0, and wherein the drive control means supplies, to the driving means, a driving signal which is comprised of a driving signal based on synthesizing a first driving signal having a first driving frequency and a second driving signal having a second driving frequency, and which is such driving signal that, when a lower-frequency side driving frequency among the first and second driving frequencies is denoted by Df1 and a higher-frequency side driving frequency is denoted by Df2, it satisfies relationshi
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: April 12, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Hideta Nishizawa, Kazufumi Onuma
  • Patent number: 7920313
    Abstract: An oscillator device includes an oscillation system having first and second oscillators and first and second resilient supporting members, wherein the oscillation system has at least two frequencies of natural oscillation mode around a torsion axis which include a first resonance frequency f1 and a second resonance frequency f2, wherein there is a relationship that f2 is approximately two-fold of f1, and wherein a drive control member supplies, to a driving member, a driving signal which is comprised of a driving signal based on synthesizing a first driving signal having a first driving frequency and a second driving signal having a second driving frequency, and which is such driving signal that, among the first and second driving frequencies, a lower-frequency side driving frequency Df1 and a higher-frequency side driving frequency Df2 satisfy a relationship Df1×2=Df2 and that Df2 satisfies a relationship f2?|?f/2|<Df2<f2+|?f/2|.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: April 5, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunari Fujii, Hideta Nishizawa, Kazufumi Onuma
  • Publication number: 20110064470
    Abstract: A light deflector device includes a light deflector having an oscillation system, a driving unit for driving the oscillation system and a drive controlling unit for supplying a drive signal. The oscillation system simultaneously generates a first oscillating motion of a first frequency and a second oscillating motion of a second frequency. The drive controlling unit supplies a drive signal formed by synthetically combining a first signal having the first frequency and a second signal having the second frequency to the driving unit and, at the same time, another drive signal for changing at least the amplitude of the first oscillating motion, the amplitude of second oscillating motion or the relative phase difference of the first oscillating motion and the second oscillating motion to the driving unit in order to correct an offset of scanning light deflected by the light deflector.
    Type: Application
    Filed: May 11, 2009
    Publication date: March 17, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takahiro Akiyama, Kazunari Fujii, Yukio Furukawa, Shinichiro Iimura
  • Publication number: 20110019256
    Abstract: A method of manufacturing an oscillator device having an oscillator supported relative to a fixed member by a torsion spring for oscillation around a torsion axis and arranged to be driven at a resonance frequency, which method includes a first step for determining an assumed value of an inertia moment weight of the oscillator, a second step for measuring the resonance frequency, a third step for calculating a spring constant of the torsion spring, from the assumed value of the inertia moment weight and the measured resonance frequency obtained at said first and second steps, a fourth step for calculating an adjustment amount for the inertia moment of the oscillator or for the spring constant of the torsion spring, based on the spring constant calculated at said third step and a target resonance frequency determined with respect to the resonance frequency of the oscillator, so as to adjust the resonance frequency to the target resonance frequency, and a fifth step for adjusting the resonance frequency of the
    Type: Application
    Filed: October 28, 2008
    Publication date: January 27, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Suguru Miyagawa, Takahiro Akiyama, Kazutoshi Torashima, Takahisa Kato, Kazunari Fujii