Patents by Inventor Shuji Saiki

Shuji Saiki 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: 20200374613
    Abstract: A loudspeaker including: a magnetic circuit, a voice coil, a vibration plate, a housing, and a magnetic fluid disposed between a plate and the voice coil in a magnetic gap. The magnetic circuit includes a first flow path which passes from a vibration plate side to a rear surface. The housing includes a second flow path which extends the first flow path, and a third flow path which passes through from the vibration plate side to the second flow path. A proportion of a second area to a first area matches with a proportion of an outer area to an inner area, which is an area of the vibration plate corresponding to an inner side with respect to the voice coil.
    Type: Application
    Filed: August 1, 2018
    Publication date: November 26, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shuji Saiki, Yuji Matsuo, Kazuyuki Kosuda, Yuichi Kobayashi, Yasuhiro Makino
  • Patent number: 10735852
    Abstract: A speaker system includes a speaker unit that outputs sound, a cabinet having a wall to which the speaker unit is attached, and an acoustic transmission tube that is disposed inside the cabinet and has an open end and a closed end, the acoustic transmission tube having an aperture in a side wall.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: August 4, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Toshiyuki Matsumura, Shuji Saiki
  • Patent number: 10491984
    Abstract: Provided is a loudspeaker device that can improve sound quality. The loudspeaker device includes: a loudspeaker housing; a first loudspeaker unit provided in a first wall of the loudspeaker housing; and an acoustic tube communicating an inside and an outside of the loudspeaker housing to each other. The acoustic tube has a predetermined length, and is accommodated in the loudspeaker housing and is helically shaped.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: November 26, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuki Honda, Takafumi Yuasa, Akihisa Kawamura, Toshiyuki Matsumura, Shuji Saiki, Satoshi Takayama, Suemei Fukuhara, Isao Kuramitsu, Ippei Kiyama
  • Patent number: 10462553
    Abstract: A speaker device includes a first speaker unit, a first cabinet that houses the first speaker unit, and an annular portion defining a sound path that guides sound radiated from the first speaker unit to outside the first cabinet, the annular portion being positioned on a sound radiation side of the first speaker unit and arranged so as to sound a diaphragm in the first speaker unit. The speaker device also includes a second cabinet arranged inside the annular portion and spaced apart from the sound path, the sound path being annular, and a second speaker unit that radiates sound in a direction in which the first speaker unit radiates sound and that is stored in the second cabinet. The speaker device further includes a resonant portion having an aperture communicating with the sound path and defining a resonant space.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: October 29, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Toshiyuki Matsumura, Akihisa Kawamura, Shuji Saiki
  • Publication number: 20190246198
    Abstract: A speaker system includes a speaker unit that outputs sound, a cabinet having a wall to which the speaker unit is attached, and an acoustic transmission tube that is disposed inside the cabinet and has an open end and a closed end, the acoustic transmission tube having an aperture in a side wall.
    Type: Application
    Filed: February 4, 2019
    Publication date: August 8, 2019
    Inventors: Toshiyuki MATSUMURA, Shuji SAIKI
  • Publication number: 20180279039
    Abstract: A speaker device includes a first speaker unit, a first cabinet that houses the first speaker unit, an annular portion defining a sound path that guides sound radiated from the first speaker unit to outside the first cabinet, the annular portion being positioned on a sound radiation side of the first speaker unit and arranged so as to sound a diaphragm in the first speaker unit, a second cabinet arranged inside the annular portion and spaced apart from the sound path, the sound path being tubular, a second speaker unit that radiates sound in a direction in which the first speaker unit radiates sound and that is stored in the second cabinet, and a resonant portion having an aperture communicating with the sound path and defining a resonant space.
    Type: Application
    Filed: February 22, 2018
    Publication date: September 27, 2018
    Inventors: TOSHIYUKI MATSUMURA, AKIHISA KAWAMURA, SHUJI SAIKI
  • Publication number: 20180249243
    Abstract: A loudspeaker device includes: a plurality of loudspeaker units; and a plurality of horns provided in the plurality of loudspeaker units, respectively, the plurality of horns each restricting spread of sound output from a corresponding one of the loudspeaker units to a predetermined range.
    Type: Application
    Filed: August 8, 2016
    Publication date: August 30, 2018
    Inventors: KAZUKI HONDA, TAKAFUMI YUASA, AKIHISA KAWAMURA, TOSHIYUKI MATSUMURA, SHUJI SAIKI, SATOSHI TAKAYAMA, SUEMEI FUKUHARA, ISAO KURAMITSU, IPPEI KIYAMA
  • Publication number: 20180242061
    Abstract: A loudspeaker device includes: a loudspeaker housing; a first loudspeaker unit provided in a first wall of the loudspeaker housing; and an acoustic tube communicating an inside and an outside of the loudspeaker housing to each other. The acoustic tube has a predetermined length, and is accommodated in the loudspeaker housing while spirally bent.
    Type: Application
    Filed: August 8, 2016
    Publication date: August 23, 2018
    Inventors: KAZUKI HONDA, TAKAFUMI YUASA, AKIHISA KAWAMURA, TOSHIYUKI MATSUMURA, SHUJI SAIKI, SATOSHI TAKAYAMA, SUEMEI FUKUHARA, ISAO KURAMITSU, IPPEI KIYAMA
  • Patent number: 9820047
    Abstract: A method is provided for causing a processor included in a speaker system to execute operations. The operations include acquiring, using a measurement microphone, reflected sound information regarding an effect of sounds that are played back by a plurality of speakers having predetermined directivity and that are reflected off an object, where the plurality of speakers are included in the speaker system. The operations also include calculating correction coefficients used to correct acoustic characteristics of the plurality of speakers on the basis of the acquired reflected sound information. The operations further include correcting the acoustic characteristics of the plurality of speakers using the calculated correction coefficients.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: November 14, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Akihisa Kawamura, Toshiyuki Matsumura, Isao Kakuhari, Shuji Saiki, Satoshi Takayama, Kazuki Honda, Takafumi Yuasa
  • Patent number: 9774935
    Abstract: A speaker device for reproducing an audio signal includes a first speaker including a first diaphragm and a first magnetic circuit that drives the first diaphragm, where the first diaphragm reproduces an audio signal including a predetermined frequency range, a second speaker including a second diaphragm and a second magnetic circuit that drives the second diaphragm, where the second diaphragm reproduces an audio signal including a frequency range substantially the same as the predetermined frequency range, and at least one cabinet having the first speaker and the second speaker mounted therein so that radiation directions of sounds are opposite to each other. At least part of a space formed between the first speaker and the second speaker communicates with the outside of the cabinet. When the speaker device reproduces the audio signal, the first diaphragm and the second diaphragm vibrate in opposite directions.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: September 26, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Toshiyuki Matsumura, Akihisa Kawamura, Kazuki Honda, Takafumi Yuasa, Shuji Saiki, Satoshi Takayama
  • Patent number: 9668058
    Abstract: A speaker diaphragm includes: a vibrator; and a suspension adhered to an outer peripheral part of the vibrator and supporting the vibrator so that the vibrator can vibrate, at least part of the suspension including a top surface member constituting a top surface part of the suspension, a rear surface member constituting a rear surface part of the suspension, and an intermediate member between the top surface member and the rear surface member, these members being stacked, the intermediate member having a rigidity lower than that of at least one of the top surface member and the rear surface member, the top surface member having one or more first holes, the rear surface member having one or more second holes, and at least some of the first holes and second holes being dispose so as to overlap across the intermediate member in a direction in which the members are stacked.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: May 30, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Toshiyuki Matsumura, Shuji Saiki
  • Publication number: 20170064421
    Abstract: A speaker device for reproducing an audio signal includes a first speaker including a first diaphragm and a first magnetic circuit that drives the first diaphragm, where the first diaphragm reproduces an audio signal including a predetermined frequency range, a second speaker including a second diaphragm and a second magnetic circuit that drives the second diaphragm, where the second diaphragm reproduces an audio signal including a frequency range substantially the same as the predetermined frequency range, and at least one cabinet having the first speaker and the second speaker mounted therein so that radiation directions of sounds are opposite to each other. At least part of a space formed between the first speaker and the second speaker communicates with the outside of the cabinet. When the speaker device reproduces the audio signal, the first diaphragm and the second diaphragm vibrate in opposite directions.
    Type: Application
    Filed: August 25, 2016
    Publication date: March 2, 2017
    Inventors: TOSHIYUKI MATSUMURA, AKIHISA KAWAMURA, KAZUKI HONDA, TAKAFUMI YUASA, SHUJI SAIKI, SATOSHI TAKAYAMA
  • Publication number: 20170064448
    Abstract: A method causing a processor included in a speaker system to execute operations includes acquiring, using a measurement microphone, reflected sound information regarding an effect of sounds that are played back by a plurality of speakers having predetermined directivity and that are reflected off an object, where the plurality of speakers are included in the speaker system, calculating correction coefficients used to correct acoustic characteristics of the plurality of speakers on the basis of the acquired reflected sound information, and correcting the acoustic characteristics of the plurality of speakers using the calculated correction coefficients.
    Type: Application
    Filed: August 25, 2016
    Publication date: March 2, 2017
    Inventors: AKIHISA KAWAMURA, TOSHIYUKI MATSUMURA, ISAO KAKUHARI, SHUJI SAIKI, SATOSHI TAKAYAMA, KAZUKI HONDA, TAKAFUMI YUASA
  • Patent number: 9432773
    Abstract: A speaker includes a diaphragm and a magnetic circuit, a plurality of acoustic paths that provide connection between a space formed on a side including the magnetic circuit with respect to the diaphragm and a space exterior to the speaker are formed in the magnetic circuit, and the plurality of acoustic paths include a first acoustic path and a second acoustic path that differs in acoustic impedance from the first acoustic path.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: August 30, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Atsushi Sakaguchi, Shuji Saiki, Toshiyuki Matsumura
  • Patent number: 9414151
    Abstract: A speaker system includes a speaker cabinet that has an opening, a first speaker including a first diaphragm, and at least one acoustic tube opened at both ends. When an amplitude of vibration of the first diaphragm vibrated by applying a correction AC signal together with the first AC signal to the first speaker is equalized to the amplitude of vibration of the second diaphragm, a sound pressure reproduced by vibration of the first diaphragm is equal to or lower than a sound pressure reproduced by vibration of the second diaphragm of the second speaker. This is accomplished by applying a third AC signal having a frequency equal to or higher than a minimum resonance frequency of the closed type cabinet determined by the internal volume of the closed type cabinet and the caliber of the second speaker is applied to the second speaker.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: August 9, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Sawako Kano, Toshiyuki Matsumura, Shuji Saiki
  • Patent number: 9319767
    Abstract: An earphone includes: a loudspeaker unit; a sound conductive tube which is connected to a front surface having a diaphragm included in the loudspeaker unit, and has a hole through which a sound generated from the loudspeaker unit is emitted; a housing which is connected to a back surface of the loudspeaker unit so that a space is formed between the housing and the back surface of the loudspeaker unit, and has a first air hole connecting the space to external air; a first braking part which closes a sound hole of the loudspeaker unit; and a second braking part which closes the first air hole.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: April 19, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Atsushi Sakaguchi, Shuji Saiki, Toshiyuki Matsumura, Sawako Kano, Akiko Fujise
  • Patent number: 9288580
    Abstract: A speaker device includes: a magnetic circuit including a plate 1, a magnet 2 having no through-hole, and a yoke 3 forming a magnetic gap; a voice coil 6 disposed in the magnetic gap; a diaphragm 4 directly or indirectly fixed to the voice coil 6; and a magnetic fluid 7 disposed in at least a space between an outer peripheral surface of the voice coil 6 and an inner peripheral surface of the yoke 3. A rear surface side space between a rear surface of the diaphragm 4 and a front surface of the plate 1 communicates with a space outside the speaker device through a gap-for-communication 15 which is formed in at least a part, in a peripheral direction of the voice coil 6, of the space between the outer peripheral surface of the plate 1 and the inner peripheral surface of the voice coil 6.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: March 15, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Toshiyuki Matsumura, Shuji Saiki
  • Patent number: 9247349
    Abstract: A loudspeaker includes a diaphragm that vibrates back and forth to emit a sound, a magnetic circuit that is provided on a rear side of the diaphragm and has a magnetic gap on a diaphragm side, and a voice coil that is directly or indirectly joined to the diaphragm and disposed within the magnetic gap. A magnetic fluid is loaded within the magnetic gap. Also, a plurality of first edge pieces are provided at different positions in an outer circumferential portion of the diaphragm for vibratably supporting the diaphragm, each of the first edge pieces having a non-linear cross-sectional shape.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: January 26, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shuji Saiki, Hiroyuki Takewa
  • Publication number: 20160014522
    Abstract: A speaker diaphragm includes: a vibrator; and a suspension adhered to an outer peripheral part of the vibrator and supporting the vibrator so that the vibrator can vibrate, at least part of the suspension including a top surface member constituting a top surface part of the suspension, a rear surface member constituting a rear surface part of the suspension, and an intermediate member between the top surface member and the rear surface member, these members being stacked, the intermediate member having a rigidity lower than that of at least one of the top surface member and the rear surface member, the top surface member having one or more first holes, the rear surface member having one or more second holes, and at least some of the first holes and second holes being dispose so as to overlap across the intermediate member in a direction in which the members are stacked.
    Type: Application
    Filed: July 2, 2015
    Publication date: January 14, 2016
    Inventors: TOSHIYUKI MATSUMURA, SHUJI SAIKI
  • Publication number: 20150319523
    Abstract: When an amplitude of vibration of a first diaphragm of a first speaker unit vibrated by applying a first and a correction AC signals having a frequency in a first frequency band to the first speaker unit is equalized to that of a second diaphragm of a second speaker unit vibrated by applying a second AC signal being the same as the first AC signal to the second speaker unit being the same as the first speaker unit attached to a closed type cabinet having the same internal volume as a speaker cabinet, a sound pressure reproduced by the first diaphragm is equal to or lower than that reproduced by the second diaphragm when a third AC signal having a frequency of a minimum resonance frequency or higher of the closed type cabinet determined by the internal volume thereof and the caliber of the second speaker unit is applied to the second speaker unit.
    Type: Application
    Filed: April 16, 2015
    Publication date: November 5, 2015
    Inventors: SAWAKO KANO, TOSHIYUKI MATSUMURA, SHUJI SAIKI