Patents by Inventor Koji Takayama
Koji Takayama 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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Publication number: 20120105669Abstract: An imaging apparatus includes an imaging sensor operable to capture a subject image and output image information, a gain setting unit operable to set a value of an output signal amplification gain according to a value of ISO sensitivity for amplifying the image information output from the imaging sensor, a determination unit operable to determine a value of white balance gain to be used for white balance correction according to the value of the output signal amplification gain set by the gain setting unit, and a white balance correcting unit operable to perform white balance correction on the image information output from the imaging sensor based on the value of the output signal amplification gain set by the setting unit and the value of the white balance gain determined by the determination unit.Type: ApplicationFiled: October 25, 2011Publication date: May 3, 2012Applicant: PANASONIC CORPORATIONInventors: KOJI TAKAYAMA, MARIKO YAMAZAKI
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Patent number: 8165335Abstract: The present invention is to provide a speaker having desirable sound characteristics with a smaller size, and a speaker unit having the speaker. The speaker unit has the speaker and an attachment unit. The speaker has a case, a magnetic circuit, a diaphragm, and a passage. A first chamber is disposed between an inner surface of an outer case of the case and an outer surface of the magnetic circuit. A second chamber is disposed between the diaphragm and the magnetic circuit. The passage communicates with the first and second chambers and has a groove disposed on a bottom wall of the case.Type: GrantFiled: December 28, 2006Date of Patent: April 24, 2012Assignees: Pioneer Corporation, Tohoku Pioneer CorporationInventors: Shinichi Hayasaka, Koji Takayama, Hiroyuki Kobayashi
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Patent number: 8045746Abstract: It is an object of the present invention to use a simplified structure to improve a strength of a neck portion of a conical diaphragm in the vicinity of a voice coil fixing section, thereby inhibiting an undesired dividing vibration in a speaker device. The speaker device of the present invention comprises: a generally conical diaphragm having an opening formed in a generally central position thereof; a voice coil bobbin fixed in the inner circumferential portion of the foregoing opening of the diaphragm; and a diaphragm reinforcing annular member disposed near a fixing section fixing together the diaphragm and the voice coil bobbin.Type: GrantFiled: December 26, 2006Date of Patent: October 25, 2011Assignees: Pioneer Corporation, Tohoku Pioneer CorporationInventors: Koji Takayama, Kazuki Yuze, Hiroyuki Kobayashi, Shinichi Hayasaka
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Publication number: 20110232990Abstract: A speaker vibrating body vibrated by a driving part includes a plurality of diaphragms vibratably supported by a static part supporting said driving part and a diaphragm connecting part, provided between a first diaphragm and a second diaphragm among said plurality of diaphragms, coupling said first diaphragm and said second diaphragm and synchronously moving said first diaphragm and said second diaphragm toward or away from each other.Type: ApplicationFiled: December 25, 2009Publication date: September 29, 2011Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATIONInventors: Hiroyuki Kobayashi, Toshihiro Hikichi, Takuei Nagasawa, Koji Takayama, Koji Maekawa, Kenichi Oshima, Yasuhisa Abe, Minoru Horigome
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Patent number: 8023680Abstract: The speaker unit 1 includes a speaker 2 and a mounting bracket 3. The mounting bracket 3 includes an attachment 16, a connecting part 17, and an elastic part 18. The attachment 16 is attached to the speaker 2. The connecting part 17 is linked with the attachment 16. The elastic part 18 is linked with the connecting part 17. A biting projection 23 and the interfering projection 24 are formed on the elastic part 18. The biting projection 23 and the interfering projection 24 project from the elastic part 18. The biting projection 23 bites an inner surface of a hole of a dashboard. The interfering projection 24 interferes with a projection formed on the inner surface of the dashboard, and is disposed at a deeper side of the hole than the projection.Type: GrantFiled: November 21, 2006Date of Patent: September 20, 2011Assignees: Pioneer Corporation, Tohoku Pioneer CorporationInventors: Shinichi Hayasaka, Hiroyuki Kobayashi, Koji Takayama
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Publication number: 20110116662Abstract: A speaker device includes a vibrating body including a diaphragm and a voice coil supported by a part of the diaphragm and a magnetic circuit including a first magnetic pole part having a magnet and a second magnetic pole part different from the first magnetic pole part and arranged spaced apart from the first magnetic pole part. The voice coil is arranged between the first magnetic pole part and the second magnetic pole part, the vibrating body includes a conducting part formed at a part or whole of the diaphragm, in the proximity of the voice coil, and the conducting part is arranged between the first magnetic pole part and the second magnetic pole part.Type: ApplicationFiled: July 10, 2008Publication date: May 19, 2011Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATIONInventors: Kazuki Yuze, Hiroyuki Kobayashi, Koji Takayama, Akihiko Furuto, Shintaro Niidera, Toshihiro Hikichi
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Patent number: 7849958Abstract: A Vibration system part for a speaker device includes a woven fabric or a non-woven fabric made of basalt fiber produced by twist yarn or roving yarn being a continuous long-fiber. The vibration system part for the speaker device may be a diaphragm, a center cap, an edge or a damper, for example. In a preferred example, the woven fabric or the non-woven fabric is impregnated with thermosetting resin or thermoplastic resin. Additionally, a lamination member, such as paper, foam material, resin or a film, is preferably laminated (coated) on the woven fabric or the non-woven fabric. Thus, the vibration system parts for the speaker device, having excellent acoustic property and reliability, can be obtained at a low price.Type: GrantFiled: April 20, 2006Date of Patent: December 14, 2010Assignees: Pioneer Corporation, Tohoku Pioneer CorporationInventors: Masatoshi Sato, Satoshi Hachiya, Hiroyuki Kobayashi, Koji Takayama
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Publication number: 20100108433Abstract: A method for manufacturing an electroacoustic transducer diaphragm of a multilayered structure which includes a first diaphragm layer made from a synthetic resin material and molded into a predetermined shape through injection molding, and a second diaphragm layer laminated in close contact with the first diaphragm layer and made from a material differing from that of the first diaphragm layer, the method includes inserting the second diaphragm layer into a mold for injection molding, and forming the first diaphragm layer integrally with the second diaphragm layer by injection foam-molding within the injection mold.Type: ApplicationFiled: January 7, 2010Publication date: May 6, 2010Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATIONInventors: Koji Takayama, Masatoshi Sato, Shinichi Hayasaka, Hiroyuki Kobayashi
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Patent number: 7706560Abstract: A cross-sectionally substantially-semicircular portion of an edge portion adapted to connect an outer periphery of a diaphragm to a speaker frame is configured to have an uneven-thickness structure in which the thickness of the portion gradually decreases toward a sticking portion of an outer peripheral portion of the speaker frame from a sticking portion of the outer periphery of the diaphragm. Thus, the propagation characteristic of vibrations generated on the edge portion is improved. Disturbance is prevented from occurring in an mid-range frequency characteristic due to inverse resonance caused by the edge portion.Type: GrantFiled: October 26, 2005Date of Patent: April 27, 2010Assignees: Pioneer Corporation, Tohoku Pioneer Electronic CorporationInventors: Koji Takayama, Hiroyuki Kobayashi, Shinichi Hayasaka, Kazuki Yuze
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Patent number: 7704428Abstract: A method for manufacturing a diaphragm for use in an electroacoustic transducer in a multi-layer structure which includes a first diaphragm layer of synthetic resin molded in a predetermined shape by injection molding and a second diaphragm layer layered in intimate contact on the first diaphragm layer and made of substance different from the first diaphragm layer, includes executing successively a pre-molding step and an injection-molding step, thereby providing the multi-layer structure. The pre-molding step includes attaching a non-molded sheet-like material which is a raw material of the second diaphragm layer to a mating surface of one of the die part of an injection molding die, and closing thereafter the injection molding die to give the sheet-like material a predetermined diaphragm shape. The injection molding step includes injecting synthetic resin material constituting the first diaphragm layer into the injection molding die thus closed thereby to form the first diaphragm layer.Type: GrantFiled: April 26, 2005Date of Patent: April 27, 2010Assignees: Pioneer Corporation, Tohoku Pioneer Electronic CorporationInventors: Koji Takayama, Masatoshi Sato, Shinichi Hayasaka, Hiroyuki Kobayashi
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Patent number: 7489915Abstract: A squelch circuit and a communication apparatus used with the same that are able to generate a squelch signal even if a squelch period is short and an operation of a squelch detecting circuit is insufficient, the circuit having: a squelch detecting circuit detecting the existence of a signal on a communication line in response to a transmission signal or a received signal and generating a first squelch signal; and a squelch control circuit generating a squelch mask signal in response to the first squelch signal and a transmission control signal and generating a second squelch signal based on the squelch mask signal and the control signal. The first squelch signal is controlled by the transmission signal to generate the second squelch signal in which the lacked portion of the first squelch signal is temporally restructured.Type: GrantFiled: December 1, 2005Date of Patent: February 10, 2009Assignee: Sony CorporationInventors: Tadaoki Yamamoto, Akira Matsuura, Koji Takayama
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Publication number: 20070189573Abstract: The present invention is to provide a speaker having desirable sound characteristics with a smaller size, and a speaker unit having the speaker. The speaker unit has the speaker and an attachment unit. The speaker has a case, a magnetic circuit, a diaphragm, and a passage. A first chamber is disposed between an inner surface of an outer case of the case and an outer surface of the magnetic circuit. A second chamber is disposed between the diaphragm and the magnetic circuit. The passage communicates with the first and second chambers and has a groove disposed on a bottom wall of the case.Type: ApplicationFiled: December 28, 2006Publication date: August 16, 2007Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATIONInventors: Shinichi Hayasaka, Koji Takayama, Hiroyuki Kobayashi
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Publication number: 20070165901Abstract: A speaker bracket disposed between a front end circumferential wall of a speaker frame and a speaker mounting portion of a cabinet as an adjuster, the speaker bracket includes a body formed into an approximate ring shape. The body includes a first surface and a second surface. The first surface has a frame adjusting portion to be secured to the front end circumferential wall. The second surface has a cabinet adjusting portion fixed to the speaker mounting portion. The frame adjusting portion is attachable to the front end circumferential wall from both a front side and a rear side of the speaker frame.Type: ApplicationFiled: December 28, 2006Publication date: July 19, 2007Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATIONInventors: Shinichi Hayasaka, Koji Takayama, Hiroyuki Kobayashi
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Publication number: 20070154057Abstract: It is an object of the present invention to use a simplified structure to improve a strength of a neck portion of a conical diaphragm in the vicinity of a voice coil fixing section, thereby inhibiting an undesired dividing vibration in a speaker device. The speaker device of the present invention comprises: a generally conical diaphragm having an opening formed in a generally central position thereof; a voice coil bobbin fixed in the inner circumferential portion of the foregoing opening of the diaphragm; and a diaphragm reinforcing annular member disposed near a fixing section fixing together the diaphragm and the voice coil bobbin.Type: ApplicationFiled: December 26, 2006Publication date: July 5, 2007Inventors: Koji Takayama, Kazuki Yuze, Hiroyuki Kobayashi, Shinichi Hayasaka
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Publication number: 20070154054Abstract: The speaker unit 1 includes a speaker 2 and a mounting bracket 3. The mounting bracket 3 includes an attachment 16, a connecting part 17, and an elastic part 18. The attachment 16 is attached to the speaker 2. The connecting part 17 is linked with the attachment 16. The elastic part 18 is linked with the connecting part 17. A biting projection 23 and the interfering projection 24 are formed on the elastic part 18. The biting projection 23 and the interfering projection 24 project from the elastic part 18. The biting projection 23 bites an inner surface of a hole of a dashboard. The interfering projection 24 interferes with a projection formed on the inner surface of the dashboard, and is disposed at a deeper side of the hole than the projection.Type: ApplicationFiled: November 21, 2006Publication date: July 5, 2007Inventors: Shinichi Hayasaka, Hiroyuki Kobayashi, Koji Takayama
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Publication number: 20070147652Abstract: It is an object of the present invention to provide an improved speaker device equipped with a long plate, capable of realizing a high flux density within the magnetic gap without forming any un-useful space. The speaker device has a magnetic circuit including a yoke integrally formed with a center pole and a bottom yoke; an annular magnet; and an annular top plate. A voice coil wound around a voice coil bobbin fixed with a diaphragm is freely vibratably supported in the axial direction of the center pole within the magnetic gap g formed between the center pole and the yoke. Moreover, the speaker device has a first magnet having a first inner diameter and disposed on the bottom yoke, and a second magnet having a second inner diameter larger than the first inner diameter and disposed on the first magnet. The top plate has a radial direction rectangular section portion, and a cylindrical bent portion facing between the inner circumferential surface of the second magnet and the center pole.Type: ApplicationFiled: December 26, 2006Publication date: June 28, 2007Inventors: Koji Takayama, Kazuki Yuze, Hiroyuki Kobayashi, Shinichi Hayasaka
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Publication number: 20070121994Abstract: A speaker apparatus comprises an inner magnet type magnetic circuit for driving a voice coil connected to a vibrating plate. The magnetic circuit comprises; a yoke; a magnet at least partly mounted at an inside of the yoke; a pole piece being attached to the other magnetized face of the magnet at the inside of the yoke; a repulsive magnet both faces being magnetized to polarities reverse to a polarity of the magnet and attached on a surface thereof of a vibrating plate side of the pole piece; and a short-circuit ring mounted and fitted to an inner peripheral portion of a front end of the cylinder portion of the yoke.Type: ApplicationFiled: November 20, 2006Publication date: May 31, 2007Inventors: Shinichi Hayasaka, Hiroyuki Kobayashi, Koji Takayama
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Publication number: 20070003080Abstract: A speaker apparatus includes: a frame that has a diaphragm at a front side thereof; and a magnetic circuit that is disposed at a rear side of the frame so as to drive the diaphragm. The magnetic circuit includes a magnet having a polygonal outer profile coaxially positioned with the diaphragm.Type: ApplicationFiled: May 19, 2006Publication date: January 4, 2007Inventors: Koji Takayama, Hiroyuki Kobayashi
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Publication number: 20060266578Abstract: A speaker diaphragm is formed with a woven cloth as a base material. The woven cloth is formed with fibers made through mixing a natural fiber with a chemical fiber. Thereby, provided is the speaker diaphragm which has a high strength, a superior durability when inputting high power, a high environmental resistance, ability with an easy adjustment of sound quality characteristic, good-broad reproduction frequency characteristic, and a superior formability.Type: ApplicationFiled: May 19, 2006Publication date: November 30, 2006Inventors: Koji Takayama, Masatoshi Sato, Hiroyuki Kobayashi
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Publication number: 20060249327Abstract: A Vibration system part for a speaker device includes a woven fabric or a non-woven fabric made of basalt fiber produced by twist yarn or roving yarn being a continuous long-fiber. The vibration system part for the speaker device may be a diaphragm, a center cap, an edge or a damper, for example. In a preferred example, the woven fabric or the non-woven fabric is impregnated with thermosetting resin or thermoplastic resin. Additionally, a lamination member, such as paper, foam material, resin or a film, is preferably laminated (coated) on the woven fabric or the non-woven fabric. Thus, the vibration system parts for the speaker device, having excellent acoustic property and reliability, can be obtained at a low price.Type: ApplicationFiled: April 20, 2006Publication date: November 9, 2006Inventors: Masatoshi Sato, Satoshi Hachiya, Hiroyuki Kobayashi, Koji Takayama