Patents by Inventor Yoshikatsu Matsubara
Yoshikatsu Matsubara 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).
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Patent number: 11002570Abstract: A fixed element is provided to be used in a position detection device for detecting a position of a movable element that moves on the fixed element. The fixed element includes a substrate, a plurality of first electrodes and a second electrode. The substrate has as first surface, a second surface and a low-dielectric constant area. The second surface faces in an opposite direction to the first surface. The low-dielectric constant area has a lower-dielectric constant than other portions of the substrate. The first electrodes are disposed on the first surface of the substrate. The first electrodes include three or more phases arranged one-dimensionally in a repeating pattern in a movement direction of the movable element. The second electrode is disposed on the first surface of the substrate and is arranged in the movement direction of the movable element adjacent the first electrodes.Type: GrantFiled: September 18, 2018Date of Patent: May 11, 2021Assignee: YAMAHA CORPORATIONInventors: Taku Ueda, Yoshihiro Suzuki, Yoshikatsu Matsubara, Yoshihiro Natsume, Hisakazu Kato
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Publication number: 20190025090Abstract: A fixed element is provided to be used in a position detection device for detecting a position of a movable element that moves on the fixed element. The fixed element includes a substrate, a plurality of first electrodes and a second electrode. The substrate has as first surface, a second surface and a low-dielectric constant area. The second surface faces in an opposite direction to the first surface. The to low-dielectric constant area has a lower-dielectric constant than other portions of the substrate. The first electrodes are disposed on the first surface of the substrate. The first electrodes include three or more phases arranged one-dimensionally in a repeating pattern in a movement direction of the movable element. The second electrode is disposed on the first surface of the substrate and is arranged in the movement direction of the movable element adjacent the first electrodes.Type: ApplicationFiled: September 18, 2018Publication date: January 24, 2019Inventors: Taku UEDA, Yoshihiro SUZUKI, Yoshikatsu MATSUBARA, Yoshihiro NATSUME, Hisakazu KATO
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Patent number: 8983099Abstract: An electrostatic loudspeaker includes: a first electrode having acoustic transmission property; a second electrode having acoustic transmission property, and disposed so as to be opposed to the first electrode; a vibrating member having conductibility, and disposed between the first electrode and the second electrode; a first elastic member having elasticity, insulation property, and acoustic transmission property, and disposed between the vibrating member and the first electrode; a second elastic member having elasticity, insulation property, and acoustic transmission property, and disposed between the vibrating member and the second electrode; and a first separation member having insulation property and acoustic transmission property, and disposed on an opposite side of a face of the first electrode, which is opposed to the first elastic member.Type: GrantFiled: July 12, 2011Date of Patent: March 17, 2015Assignee: Yamaha CorporationInventors: Yasuaki Takano, Kunimasa Muroi, Yoshikatsu Matsubara
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Patent number: 8666097Abstract: An electrostatic speaker is constituted of upper/lower electrodes, upper/lower cushion materials, and a diaphragm. Cutouts are formed in the upper/lower electrodes, upper/lower cushion materials, and diaphragm, wherein they are shifted in position such that a part of the diaphragm and a part of the lower electrode are exposed and seen through those cutouts to horizontally adjoin in the cutout of the upper electrode. The electrostatic speaker is driven via a clip having electrodes in response to audio signals, wherein drive voltages are applied to each of the upper/lower electrodes and the diaphragm.Type: GrantFiled: September 27, 2010Date of Patent: March 4, 2014Assignee: Yamaha CorporationInventors: Hiromi Ichikawa, Yoshikatsu Matsubara
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Publication number: 20130108087Abstract: An electrostatic loudspeaker includes: a first electrode having acoustic transmission property; a second electrode having acoustic transmission property, and disposed so as to be opposed to the first electrode; a vibrating member having conductibility, and disposed between the first electrode and the second electrode; a first elastic member having elasticity, insulation property, and acoustic transmission property, and disposed between the vibrating member and the first electrode; a second elastic member having elasticity, insulation property, and acoustic transmission property, and disposed between the vibrating member and the second electrode; and a first separation member having insulation property and acoustic transmission property, and disposed on an opposite side of a face of the first electrode, which is opposed to the first elastic member.Type: ApplicationFiled: July 12, 2011Publication date: May 2, 2013Applicant: YAMAHA CORPORATIONInventors: Yasuaki Takano, Kunimasa Muroi, Yoshikatsu Matsubara
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Patent number: 8320601Abstract: An external inserting meatus of user is closed with an insert earphone device in use so that it is hard that external sound penetrates into the external inserting meatus; not only an internal sound propagation path but also an external sound propagation path are formed in an inserting body of the earphone device, and an active diaphragm is provided in the inserting body so as to make the external sound propagation path closed therewith and block the external auditory meatus from the external sound; the active diaphragm is formed from electroactive polymer layer sandwiched between electrodes, and the active diaphragm is deformed in the presence of voltage so as permit the user easily to control it.Type: GrantFiled: May 7, 2009Date of Patent: November 27, 2012Assignee: Yamaha CorporationInventors: Souichi Takigawa, Yoshikatsu Matsubara, Masahiro Sugiura, Yasuaki Takano
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Patent number: 8270657Abstract: An inserting type earphone device is broken down into a signal-to-sound converter, an ear pad to be inserted into an acoustic meatus of user, a sound tube provided between the signal-to-sound converter and the ear pad and a switching mechanism provided in association with the sound tube and ear pad, and a sound hole, which is formed in the sound tube for connecting a sound propagation hole to the outside, is open to and closed with the switching mechanism; the switching mechanism makes the sound hole open and closed through rotation thereof around the sound tube so that the ear pad is not inclined in the acoustic meatus during the rotation, whereby the ear pad is not dropped off from the acoustic meatus.Type: GrantFiled: December 22, 2009Date of Patent: September 18, 2012Assignee: Yamaha CorporationInventors: Souichi Takigawa, Yoshikatsu Matsubara, Masayoshi Yamashita, Nobushiro Aiba, Tsuneyasu Demukai
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Patent number: 8090134Abstract: An insert earphone device includes an electro-acoustic device, an inserting body, a sound tube connected between the electro-acoustic device and the inserting body and an active valve unit provided on the sound tube, the sound tube is formed with a sound propagation path open at both ends thereof to the electro-acoustic device and the inserting body and an external sound entrance open at both end thereof to environment and the sound propagation path, and the active valve unit is formed of electroactive polymer and responsive to voltage supplied through a cable so as to close and open the external sound entrance; when a user wishes to hear external sound, the user changes the polarity of voltage so that the active valve unit is deformed for conducting the environment to the sound propagation path, whereby the user hears the external sound without removing the earphone device from the ear.Type: GrantFiled: June 25, 2009Date of Patent: January 3, 2012Assignee: Yamaha CorporationInventors: Souichi Takigawa, Yoshikatsu Matsubara, Tsuneyasu Demukai
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Publication number: 20110075869Abstract: An electrostatic speaker is constituted of upper/lower electrodes, upper/lower cushion materials, and a diaphragm. Cutouts are formed in the upper/lower electrodes, upper/lower cushion materials, and diaphragm, wherein they are shifted in position such that a part of the diaphragm and a part of the lower electrode are exposed and seen through those cutouts to horizontally adjoin in the cutout of the upper electrode. The electrostatic speaker is driven via a clip having electrodes in response to audio signals, wherein drive voltages are applied to each of the upper/lower electrodes and the diaphragm.Type: ApplicationFiled: September 27, 2010Publication date: March 31, 2011Applicant: Yamaha CorporationInventors: Hiromi Ichikawa, Yoshikatsu Matsubara
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Publication number: 20100166245Abstract: An inserting type earphone device is broken down into a signal-to-sound converter, an ear pad to be inserted into an acoustic meatus of user, a sound tube provided between the signal-to-sound converter and the ear pad and a switching mechanism provided in association with the sound tube and ear pad, and a sound hole, which is formed in the sound tube for connecting a sound propagation hole to the outside, is open to and closed with the switching mechanism; the switching mechanism makes the sound hole open and closed through rotation thereof around the sound tube so that the ear pad is not inclined in the acoustic meatus during the rotation, whereby the ear pad is not dropped off from the acoustic meatus.Type: ApplicationFiled: December 22, 2009Publication date: July 1, 2010Applicant: Yamaha CorporationInventors: Souichi Takigawa, Yoshikatsu Matsubara, Masayoshi Yamashita, Nobushiro Aiba, Tsuneyasu Demukai
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Publication number: 20100061582Abstract: An insert earphone device includes an electro-acoustic device, an inserting body, a sound tube connected between the electro-acoustic device and the inserting body and an active valve unit provided on the sound tube, the sound tube is formed with a sound propagation path open at both ends thereof to the electro-acoustic device and the inserting body and an external sound entrance open at both end thereof to environment and the sound propagation path, and the active valve unit is formed of electroactive polymer and responsive to voltage supplied through a cable so as to close and open the external sound entrance; when a user wishes to hear external sound, the user changes the polarity of voltage so that the active valve unit is deformed for conducting the environment to the sound propagation path, whereby the user hears the external sound without removing the earphone device from the ear.Type: ApplicationFiled: June 25, 2009Publication date: March 11, 2010Applicant: Yamaha CorporationInventors: Souichi Takigawa, Yoshikatsu Matsubara, Tsuneyasu Demukai
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Publication number: 20090285437Abstract: An external inserting meatus of user is closed with an insert earphone device in use so that it is hard that external sound penetrates into the external inserting meatus; not only an internal sound propagation path but also an external sound propagation path are formed in an inserting body of the earphone device, and an active diaphragm is provided in the inserting body so as to make the external sound propagation path closed therewith and block the external auditory meatus from the external sound; the active diaphragm is formed from electroactive polymer layer sandwiched between electrodes, and the active diaphragm is deformed in the presence of voltage so as permit the user easily to control it.Type: ApplicationFiled: May 7, 2009Publication date: November 19, 2009Applicant: Yamaha CorporationInventors: Souichi Takigawa, Yoshikatsu Matsubara, Masahiro Sugiura, Yasuaki Takano
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Patent number: 5863206Abstract: An apparatus for reproducing video, audio and accompanying characters, suitable for use as a sing-along or karaoke apparatus, uses pre-stored display patterns, such as animal figures, instead of video segments. Thus, the apparatus does not have to rely upon the availability of video software that contains song lyrics as well as matching video segments. The apparatus is inexpensive to manufacture since the hardware related to reading and processing an optical image recording disk is not needed. The apparatus also uses the animation patterns on the screen to inform users about the beginning of the music program. Specifically, the changes in the motion and moving speed of display patterns inform the user of the start time of a selected music program. The animation patterns may be displayed during introduction and intermission period, and even during music performance.Type: GrantFiled: September 1, 1995Date of Patent: January 26, 1999Assignee: Yamaha CorporationInventors: Sadayuki Narusawa, Yoshikatsu Matsubara