Patents by Inventor Susumu Fukushima
Susumu Fukushima 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: 20130182883Abstract: A sound reproduction device includes a superdirective speaker having a first surface, and an attachment part having a second surface opposed to the first surface. The first surface has a convex face, and the second surface has a concave face which can come into contact with the convex face. A curvature of the convex face is set larger than that of the concave face. A direction of emitting a sound wave of the superdirective speaker can be adjusted by making the convex face move along the concave face.Type: ApplicationFiled: August 23, 2011Publication date: July 18, 2013Applicant: PANASONIC CORPORATIONInventors: Katsu Takeda, Fumiyasu Konno, Rihito Shoji, Susumu Fukushima
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Publication number: 20130163795Abstract: Provided is a sound reproduction device including a loudspeaker and a superdirective speaker. The loudspeaker is configured so that a sound pressure of audible sound produced therefrom decreases as the sound travels farther away from the loudspeaker. The superdirective speaker is configured so that a sound pressure of audible sound produced therefrom has a peak at a predetermined distance from the superdirective speaker, and is configured to use an ultrasonic wave as a carrier wave. The loudspeaker and the superdirective speaker are positioned such that a loudspeaker sound field of the audible sound produced from the loudspeaker and a superdirective speaker sound field of the audible sound produced from the superdirective speaker overlap with each other at a position of a listener.Type: ApplicationFiled: July 12, 2011Publication date: June 27, 2013Applicant: PANASONIC CORPORATIONInventors: Katsu Takeda, Fumiyasu Konno, Susumu Fukushima, Rihito Shoji
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Patent number: 8384449Abstract: A synthesizer of the present invention includes a synthesizer section that generates an oscillation signal based on a reference oscillation signal output from a MEMS resonator and inputs the oscillation signal to a frequency converter; and a control section that adjusts a frequency of the oscillation signal output from the synthesizer section. In frequency adjustment by the control section, when a frequency adjustment unit of the synthesizer section is defined as predetermined value F in which quality of an output signal from the frequency converter is a quality limit threshold value, frequency adjustment unit ?fcont of the synthesizer section is within predetermined value F.Type: GrantFiled: February 10, 2009Date of Patent: February 26, 2013Assignee: Panasonic CorporationInventors: Akihiko Namba, Yasunobu Tsukio, Susumu Fukushima
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Publication number: 20110237965Abstract: A pulse wave detector includes a) a light source repeatedly turned on and off, b) a light receiving element for receiving light, and c) an arithmetic processor for processing an output value acquired through the light receiving element. The arithmetic processor performs arithmetic processing for calculating the difference between a first output value acquired through the light receiving element when the light source is turned on and a second output value acquired through the light receiving element when the light source is turned off. With this structure, a pulse wave detector capable of detecting pulse waves even under the conditions where external light intensity varies can be provided.Type: ApplicationFiled: March 14, 2011Publication date: September 29, 2011Applicant: Panasonic CorporationInventors: Takuya Hayashi, Katsumi Imada, Susumu Fukushima
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Publication number: 20110181354Abstract: A reception device according to the present invention includes: a step-variable gain amplifier; and a controller operable to control the gain of the step-variable gain amplifier based on the signal quality value of a demodulator. The gain of the step-variable gain amplifier varies within N gains from a first gain to an N-th gain, and the controller changes a number of the gain one by one when changing the gain of the step-variable gain amplifier. Thus, it is possible to realize a reception device using the step-variable gain amplifier requiring a low control voltage as compared to a continuously-variable gain amplifier.Type: ApplicationFiled: September 29, 2009Publication date: July 28, 2011Applicant: Panasonic CorporationInventors: Takashi Umeda, Hiroaki Ozeki, Takeshi Fujii, Susumu Fukushima
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Publication number: 20110038429Abstract: A signal branching filter according to the invention is a signal branching filter connected to a network having at least four terminals. The signal branching filter includes a first line one end of which is connected to a first terminal of the network, a second line one end of which is connected to a second terminal of the network, a third line one end of which is connected to a third terminal of network, and a fourth line one end of which is connected to a fourth terminal of the network. The other end of the first line and the other end of the second line are connected to each other at a first node, and the other end of the third line and the other end of the fourth line are connected to each other at a second node. When a signal is received from the first node, a phase difference between a phase of a signal appearing on a second node side of the third line and a phase of a signal appearing on a second node side of the fourth line is almost 180°±360°*n is an integer equal to or larger than 0).Type: ApplicationFiled: March 12, 2009Publication date: February 17, 2011Inventors: Motohiko Sako, Susumu Fukushima, Hidenori Kitamura, Yuta Yamamoto, Takuya Hayashi
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Publication number: 20100321114Abstract: An amplifier circuit includes a variable gain amplifier that amplifies and outputs a signal from an output port, a controller operable to change an gain of the variable gain amplifier, a mixer that mixes the signal output from the output port of the variable gain amplifier with a local oscillating signal to heterodyne the signal and outputs the heterodyned signal, a filter that outputs a signal component having a predetermined frequency out of the signal output from the mixer, and a detector that detects a power level based on power of the signal output from the filter. The controller is operable to change the gain according to the first power level such that a quality level representing quality of the signal output from the filter becomes a target quality level immediately after the gain is changed. The amplifier circuit can have small power consumption.Type: ApplicationFiled: February 24, 2009Publication date: December 23, 2010Applicant: Panasonic CorporationInventors: Eiji Okada, Daisuke Nishimura, Hiroaki Ozeki, Noriaki Saito, Susumu Fukushima
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Publication number: 20100315138Abstract: A synthesizer of the present invention includes a synthesizer section that generates an oscillation signal based on a reference oscillation signal output from a MEMS resonator and inputs the oscillation signal to a frequency converter; and a control section that adjusts a frequency of the oscillation signal output from the synthesizer section. In frequency adjustment by the control section, when a frequency adjustment unit of the synthesizer section is defined as predetermined value F in which quality of an output signal from the frequency converter is a quality limit threshold value, frequency adjustment unit ?fcont of the synthesizer section is within predetermined value F.Type: ApplicationFiled: February 10, 2009Publication date: December 16, 2010Applicant: Panasonic CorporationInventors: Akihiko Namba, Yasunobu Tsukio, Susumu Fukushima
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Patent number: 7830329Abstract: Provided is a composite antenna adapted for reduction in size while ensuring sufficient electrical isolation between antenna elements. The composite antenna comprises ground plane, first feeding point connected to ground plane, first conductor connected to first feeding point and disposed linearly symmetrically with respect to axis, second conductor connected to first conductor and disposed linearly symmetrically with respect to axis, second feeding point disposed in a position along axis, third conductor connecting second feeding point and second conductor, and fourth conductor connecting second feeding point and second conductor and disposed in a linearly symmetrical manner to third conductor with respect to axis.Type: GrantFiled: November 8, 2006Date of Patent: November 9, 2010Assignee: Panasonic CorporationInventors: Susumu Fukushima, Motohiko Sako
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Patent number: 7742004Abstract: An on-vehicle antenna system which offers a superior receiving performance, by suppressing reception of reflected/scattered waves coming from inside of the vehicle's cabin; these reflected/scattered waves being an adverse factor which deteriorates signal receiving performance of an antenna. The antenna system is installed at glass pane portion of a vehicle with direction (12) of the greatest radiation pattern (11) directed towards ahead (14) of the vehicle from boundary plane (10) containing power supply portion (9), while direction (13) of the smallest radiation pattern (11) towards behind (15) of the vehicle. The above-configured antenna system can suppress those waves reflected/scattered in the vehicle cabin from being received; as the result, it demonstrates improved characteristics.Type: GrantFiled: April 3, 2006Date of Patent: June 22, 2010Assignee: Panasonic CorporationInventors: Susumu Fukushima, Akihiro Hoshiai
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Patent number: 7659793Abstract: An antenna device includes an antenna element, a high-frequency circuit connected to the antenna element, a first ground section connected to the high-frequency circuit, a reactance circuit connected to the first ground section, and a second ground section connected to the reactance circuit. Employing the structure above allows the antenna device to have a compact body and to easily control antenna characteristics, such as radiation characteristics and input impedance characteristics.Type: GrantFiled: November 24, 2005Date of Patent: February 9, 2010Assignee: Panasonic CorporationInventor: Susumu Fukushima
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Publication number: 20090281381Abstract: An antenna to be embedded in a capsule type medical device. The antenna includes an antenna conductor, and a sheet-like antenna substrate which at least partly electrically contacts with the antenna conductor. The antenna is formed by closely attaching the antenna conductor and the sheet-like antenna substrate.Type: ApplicationFiled: May 4, 2009Publication date: November 12, 2009Applicants: OLYMPUS MEDICAL SYSTEMS CORP., PANASONIC CORPORATIONInventors: Tomoya TAKENAKA, Masatoshi HOMAN, Yasuteru ASAKAWA, Jun'ichi KIMURA, Susumu FUKUSHIMA, Motoyoshi KITAGAWA
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Publication number: 20090237319Abstract: Provided is a composite antenna adapted for reduction in size while ensuring sufficient electrical isolation between antenna elements. The composite antenna comprises ground plane, first feeding point connected to ground plane, first conductor connected to first feeding point and disposed linearly symmetrically with respect to axis, second conductor connected to first conductor and disposed linearly symmetrically with respect to axis, second feeding point disposed in a position along axis, third conductor connecting second feeding point and second conductor, and fourth conductor connecting second feeding point and second conductor and disposed in a linearly symmetrical manner to third conductor with respect to axis.Type: ApplicationFiled: November 8, 2006Publication date: September 24, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Susumu Fukushima, Motohiko Sako
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Publication number: 20080291097Abstract: An on-vehicle antenna system which offers a superior receiving performance, by suppressing reception of reflected/scattered waves coming from inside of the vehicle's cabin; these reflected/scattered waves being an adverse factor which deteriorates signal receiving performance of an antenna. The antenna system is installed at glass pane portion of a vehicle with direction (12) of the greatest radiation pattern (11) directed towards ahead (14) of the vehicle from boundary plane (10) containing power supply portion (9), while direction (13) of the smallest radiation pattern (11) towards behind (15) of the vehicle. The above-configured antenna system can suppress those waves reflected/scattered in the vehicle cabin from being received; as the result, it demonstrates improved characteristics.Type: ApplicationFiled: April 3, 2006Publication date: November 27, 2008Inventors: Susumu Fukushima, Akihiro Hoshiai
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Publication number: 20080238802Abstract: An antenna device includes an antenna element, a high-frequency circuit connected to the antenna element, a first ground section connected to the high-frequency circuit, a reactance circuit connected to the first ground section, and a second ground section connected to the reactance circuit. Employing the structure above allows the antenna device to have a compact body and to easily control antenna characteristics, such as radiation characteristics and input impedance characteristics.Type: ApplicationFiled: November 24, 2005Publication date: October 2, 2008Inventor: Susumu Fukushima
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Patent number: 7365693Abstract: An antenna device includes a grounding subject, a feeder insulated from the grounding subject, a first conductor shaping like substantially a looped triangle and coupled to the feeder at a first feeder top, and a second conductor symmetric to the first conductor with respect to a phantom line extending through the feeder and coupled to the feeder at a second feeder top. The first feeder top is placed closest to the grounding subject among other elements of the first conductor, and the second feeder top is placed closest to the grounding subject among other elements of the second conductor. The foregoing structure allows a high electrical field section of a first side of the first conductor and that of a first side of the second conductor to leave further away from the grounding subject.Type: GrantFiled: September 26, 2006Date of Patent: April 29, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Akihiro Hoshiai, Susumu Fukushima, Yosuke Wada
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Patent number: 7205945Abstract: A circularly polarized wave antenna is an antenna having two or more electrically conductive elements and a high frequency circuit, wherein at least two of the plurality of electrically conductive elements are constructed in V-shape with an angle of 90 degrees; therefore, it is possible to realize a circularly polarized wave antenna of simple construction having directivity gains in multi-direction.Type: GrantFiled: June 8, 2004Date of Patent: April 17, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Susumu Fukushima
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Publication number: 20070069964Abstract: An antenna device includes a grounding subject, a feeder insulated from the grounding subject, a first conductor shaping like substantially a looped triangle and coupled to the feeder at a first feeder top, and a second conductor symmetric to the first conductor with respect to a phantom line extending through the feeder and coupled to the feeder at a second feeder top. The first feeder top is placed closest to the grounding subject among other elements of the first conductor, and the second feeder top is placed closest to the grounding subject among other elements of the second conductor. The foregoing structure allows a high electrical field section of a first side of the first conductor and that of a first side of the second conductor to leave further away from the grounding subject.Type: ApplicationFiled: September 26, 2006Publication date: March 29, 2007Inventors: Akihiro Hoshiai, Susumu Fukushima, Yosuke Wada
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Patent number: 7138950Abstract: The objective of the present invention is to realize, in an antenna and an electronic equipment using the same, miniaturization of that antenna. To achieve said objective, an antenna electrode (19) is provided on the surface of the main body (18), a grounding electrode (20) is provided on the back face, and a signal electrode (21) is provided on the circumferential face, the antenna electrode (19) being different in length at the X axis from the Y axis. This enables to construct a broad-band antenna with a single piece of antenna, contributing to miniaturization of the antenna.Type: GrantFiled: October 22, 2003Date of Patent: November 21, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Susumu Fukushima, Hideki Nanba, Hiroshi Kuroda
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Patent number: 7057558Abstract: A small antenna has two or more feeding ports. A radiator is made of a planar conductor having a substantially circular shape having the diameter of a substantially half wavelength or a substantially regularly polygonal shape where the length of a diagonal line passes through the center point is the substantially half wavelength. A ground plate is faced to the radiator. On the radiator, the feeding ports are connected to feeding points on two orthogonal line segments passing through the center of the radiator. This antenna is used as not only a single antenna but also two independent antennas having secured isolation between the feeding ports. A small antenna device used as two independent antennas is thus provided. The radiator is formed in a hat shape having an edge, has an Stepped Impedance Resonator (SIR) structure where the diameter of a crest part is a quarter wavelength, and is shortened.Type: GrantFiled: June 26, 2003Date of Patent: June 6, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Susumu Fukushima, Takeo Yasuho