Patents by Inventor Yoichi Hashimoto
Yoichi Hashimoto 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: 9240858Abstract: In order to perform the polarization demultiplexing of the polarization multiplexed BPSK signal using a small-scale circuit by means of optical phase modulation of the polarization multiplexed BPSK signal into the pseudo polarization multiplexed QPSK signal, an optical communication system for communicating by using polarization multiplexed optical signals includes an optical phase modulation means for modulating phases of a plurality of optical signals employing BPSK modulation system including information to be communicated, and for generating a plurality of optical signals to become signals by pseudo QPSK modulation system; and a signal restoration means for performing polarization demultiplexing of a plurality of polarization multiplexed optical signals from a plurality of optical signals modulated into the pseudo QPSK modulation system, and for restoring the information to be communicated.Type: GrantFiled: November 22, 2011Date of Patent: January 19, 2016Assignee: NEC CORPORATIONInventors: Kazuomi Endo, Yoichi Hashimoto
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Publication number: 20160013882Abstract: In a digital coherent communication scheme utilizing polarization-multiplexed optical signals, it may be impossible to separate transmission light and reception light from each other with high precision for transmission/reception an optical signal. An optical space transmission system according to the present invention is provided with a first transmission/reception device which radiates first reception light and second reception light whose polarization states are orthogonal to each other, and a second transmission/reception device which radiates third reception light alternately including a first reception light component whose polarization state is the same as the first reception light and a second reception light component whose polarization state is the same as the second reception light in a time-wise manner.Type: ApplicationFiled: March 3, 2014Publication date: January 14, 2016Applicant: NEC CorporationInventor: Yoichi HASHIMOTO
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Patent number: 9166305Abstract: Good signal transmission characteristics can be stably obtained by a simple structure. A pressure-contact surface of a cover inner surface of a shell cover part 13b, which is openably/closably coupled to a cylindrical opening of an external conductor shell 13a, and an insulative pressing plate 11d is provided with a void part 14, which separates at least one of them from the other one. By virtue of this, it is configured that the characteristic impedance about the cable-shaped signal transmission medium SC can be adjusted by the void part 14, and the matching degree (VSWR) of the characteristic impedance with respect to transmission signals can be easily and appropriately matched.Type: GrantFiled: August 6, 2014Date of Patent: October 20, 2015Assignee: DAI-ICHI SEIKO CO., LTD.Inventors: Yoichi Hashimoto, Hiroyuki Kon
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Patent number: 9154232Abstract: In order to allow reception in which receive sensitivity does not depend upon polarization state in reception of a multi-level phase optical signal, in this optical reception method, a multi-level phase optical signal of a single polarization is separated into a first optical signal and a second optical signal of which polarizations are mutually orthogonal, the ratio of the power of the first optical signal to the power of the second signal is calculated, and the difference between the phase of the first optical signal and the phase of second optical signal is calculated as an amount of compensation, whereupon, on the basis of the ratio and the amount of compensation, the first optical signal and the second optical signal are combined using a maximal ratio combining method, and the amount of compensation is modified on the basis of the ratio.Type: GrantFiled: December 9, 2011Date of Patent: October 6, 2015Assignee: NEC CORPORATIONInventors: Kazuomi Endo, Yoichi Hashimoto
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Patent number: 9077130Abstract: With a simple configuration, increase in size can be avoided, usage durability is improved, and occurrence of insufficient electrical connection caused by dust can be prevented well. A crank part is provided in at least one of both contacts including elastic beam-like members. Both of the contacts are provided with cut-away parts, which substantially increase the span lengths of the elastic beam-like members, and gaps between the contacts and an insulating housing which ensure flexibility of the elastic beam-like members to ensure flexibility and prevent permanent deformation of the contacts while enhancing elasticity of the contacts. Dust which has entered the interior thereof is moved along the crank part to ensure electrical conductivity well, which is an employed configuration.Type: GrantFiled: October 8, 2012Date of Patent: July 7, 2015Assignee: DAI-ICHI SEIKO CO., LTD.Inventors: Yoichi Hashimoto, Takao Yamauchi, Yuma Watanabe
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Patent number: 8986043Abstract: With a simple configuration, plastic deformation of contacts can be prevented while avoiding increase in size, and occurrence of failure in electrical connection due to dust can be well prevented. In an elastic beam-like member of a first-side contact extending like a cantilever in an insulating housing, a bent extending part which substantially increases the span length of the elastic beam-like member is formed to be bent to have a curved shape at a root part serving as a part coupled to a fixing base part. A through hole is formed in a region including at least part of the bent extending part to ensure flexibility while enhancing elasticity of the contact, thereby preventing permanent deformation of the contact. Meanwhile, dust which has entered the equipment is caused to fall through the through hole, thereby ensuring electrical conductivity well.Type: GrantFiled: January 28, 2013Date of Patent: March 24, 2015Assignee: Dai-Ichi Seiko Co., Ltd.Inventors: Takeshi Hirakawa, Yoichi Hashimoto
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Publication number: 20150044912Abstract: Good signal transmission characteristics can be stably obtained by a simple structure. A pressure-contact surface of a cover inner surface of a shell cover part 13b, which is openably/closably coupled to a cylindrical opening of an external conductor shell 13a, and an insulative pressing plate 11d is provided with a void part 14, which separates at least one of them from the other one. By virtue of this, it is configured that the characteristic impedance about the cable-shaped signal transmission medium SC can be adjusted by the void part 14, and the matching degree (VSWR) of the characteristic impedance with respect to transmission signals can be easily and appropriately matched.Type: ApplicationFiled: August 6, 2014Publication date: February 12, 2015Applicant: DAI-ICHI SEIKO CO. LTD.Inventors: Yoichi HASHIMOTO, Hiroyuki Kon
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Publication number: 20140307367Abstract: A motor drive device for driving at least one motor is provided, which includes at least one amplifier module for supplying power to the at least one motor, a control circuit board including at least one amplifier connector for releasably connecting with the at least one amplifier module, respectively, and a bus bar for releasably connecting with the amplifier module to supply power to the amplifier module.Type: ApplicationFiled: April 14, 2014Publication date: October 16, 2014Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Takashi MAEDA, Yoichi HASHIMOTO, Kenji NOMURA
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Publication number: 20140152267Abstract: A battery system according to the present invention includes a secondary battery; a battery control unit that controls charging and discharging of said secondary battery; and a charging/discharging management unit that controls the charging and discharging of said secondary battery through said battery control unit, wherein said battery control unit, if an abnormality occurred during operation of said battery control unit, transmits remaining capacity data that represent a remaining capacity of said secondary battery that remained immediately before the abnormality occurred to said charging/discharging management unit.Type: ApplicationFiled: June 7, 2012Publication date: June 5, 2014Applicant: NEC ENERGY DEVICES, LTD.Inventors: Yoichi Hashimoto, Hiroaki Ueno
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Publication number: 20140044434Abstract: A transmitter includes an optical data modulation unit which modulates an optical carrier having a first frequency with a data signal and outputs the optical carrier as a signal light, an optical frequency shift unit which shifts and outputs the frequency of the signal light from the first frequency to a second frequency based on a predetermined frequency offset amount, and a frequency offset control unit which controls the frequency offset amount such that a harmonic component generated in the optical frequency shift unit does not overlap with a band of the data signal.Type: ApplicationFiled: March 23, 2012Publication date: February 13, 2014Applicant: NEC CorporationInventor: Yoichi Hashimoto
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Publication number: 20140044440Abstract: In order to allow reception in which receive sensitivity does not depend upon polarization state in reception of a multi-level phase optical signal, in this optical reception method, a multi-level phase optical signal of a single polarization is separated into a first optical signal and a second optical signal of which polarizations are mutually orthogonal, the ratio of the power of the first optical signal to the power of the second signal is calculated, and the difference between the phase of the first optical signal and the phase of second optical signal is calculated as an amount of compensation, whereupon, on the basis of the ratio and the amount of compensation, the first optical signal and the second optical signal are combined using a maximal ratio combining method, and the amount of compensation is modified on the basis of the ratio.Type: ApplicationFiled: December 9, 2011Publication date: February 13, 2014Applicant: NEC CORPORATIONInventors: Kazuomi Endo, Yoichi Hashimoto
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Publication number: 20130243434Abstract: In order to perform the polarization demultiplexing of the polarization multiplexed BPSK signal using a small-scale circuit by means of optical phase modulation of the polarization multiplexed BPSK signal into the pseudo polarization multiplexed QPSK signal, an optical communication system for communicating by using polarization multiplexed optical signals includes an optical phase modulation means for modulating phases of a plurality of optical signals employing BPSK modulation system including information to be communicated, and for generating a plurality of optical signals to become signals by pseudo QPSK modulation system; and a signal restoration means for performing polarization demultiplexing of a plurality of polarization multiplexed optical signals from a plurality of optical signals modulated into the pseudo QPSK modulation system, and for restoring the information to be communicated.Type: ApplicationFiled: November 22, 2011Publication date: September 19, 2013Applicant: NEC CORPORATIONInventors: Kazuomi Endo, Yoichi Hashimoto
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Publication number: 20120224804Abstract: A semiconductor device (and method thereof) includes an LSI chip, a package substrate, an optical element chip, and a flexible optical waveguide substrate. The LSI chip and the optical element chip are mounted on an upper surface of the package substrate. The optical element chip is electrically connected to the LSI chip through the package substrate. One end of the flexible optical waveguide substrate is optically coupled to the optical element chip, and the other end is arranged on a bottom surface side of the package substrate.Type: ApplicationFiled: October 25, 2010Publication date: September 6, 2012Inventors: Yoshihito Hashimoto, Yoichi Hashimoto
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Publication number: 20100297637Abstract: To detect a bacterium belonging to the genus Legionella rapidly, with high sensitivity, and specifically. Disclosed are: a primer set for amplifying ribosomal RNA of a bacterium belonging to the genus Legionella specifically and highly efficiently; and a method for detecting ribosomal RNA of a bacterium belonging to the genus Legionella by using the primer set.Type: ApplicationFiled: October 1, 2008Publication date: November 25, 2010Applicants: TOSOH CORPORATION, INTEC SYSTEMS INSTITUTE ,INCORPORATEDInventors: Kurando Une, Juichi Saito, Toshinori Hayashi, Fumihide Takizawa, Yoichi Hashimoto
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Patent number: 7620272Abstract: A photoelectric composite module has an optical device, a package and a flexible printed circuit that is set along both case parts of the package, and electric wiring for the optical device is formed thereon. The package has a first case part and a second case part that is connected with the first case part by a hinge and is set on a mounted board. The optical device is joined with a surface that faces the first case part in said flexible printed circuit. The flexible printed circuit has light extraction means for transmitting an optical signal that should be exchanged between the optical device and the optical waveguide. The package has short-circuiting means for making a short circuit between the electrical wiring of the flexible printed circuit and the electrical wiring of the mounted board.Type: GrantFiled: April 23, 2007Date of Patent: November 17, 2009Assignee: NEC CorporationInventors: Tomoyuki Hino, Kazuhiko Kurata, Ichiro Ogura, Junichi Sasaki, Ichiro Hatakeyama, Yoichi Hashimoto, Ryosuke Kuribayashi
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Publication number: 20070280594Abstract: A photoelectric composite module has an optical device, a package and a flexible printed circuit that is set along both case parts of the package, and electric wiring for the optical device is formed thereon. The package has a first case part and a second case part that is connected with the first case part by a hinge and is set on a mounted board. The optical device is joined with a surface that faces the first case part in said flexible printed circuit. The flexible printed circuit has light extraction means for transmitting an optical signal that should be exchanged between the optical device and the optical waveguide. The package has short-circuiting means for making a short circuit between the electrical wiring of the flexible printed circuit and the electrical wiring of the mounted board.Type: ApplicationFiled: April 23, 2007Publication date: December 6, 2007Inventors: Tomoyuki Hino, Kazuhiko Kurata, Ichiro Ogura, Junichi Sasaki, Ichiro Hatakeyama, Yoichi Hashimoto, Ryosuke Kuribayashi
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Publication number: 20070086608Abstract: According to an embodiment of the present invention, a piezoelectric element composing a detecting part of a bone-conduction microphone is cantilevered by being mechanically pressed into an element mounting opening of a supporting member in a microphone case while temporarily bonded to a connecting member including a signal communication spacer, a copper-made spacer, a tapered ground spacer, and an insulating spacer, and optionally reinforced and fixed by use of an adhesive. Hence, it is possible to provide a cantilevered bone-conduction microphone having a vibration detecting part that can be assembled with a simple structure by use of an eco-friendly bonding material, not a solder.Type: ApplicationFiled: October 6, 2006Publication date: April 19, 2007Applicant: NEC TOKIN CORPORATIONInventors: Yoichi Hashimoto, Hideyuki Kawase, Masahiko Fujita, Yuji Nitobe
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Patent number: D674346Type: GrantFiled: February 22, 2012Date of Patent: January 15, 2013Assignee: Dai-Ichi Seiko Co., Ltd.Inventor: Yoichi Hashimoto
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Patent number: D683313Type: GrantFiled: April 13, 2012Date of Patent: May 28, 2013Assignee: Dai-Ichi Seiko Co., Ltd.Inventors: Takeshi Hirakawa, Yoichi Hashimoto
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Patent number: D700891Type: GrantFiled: August 7, 2012Date of Patent: March 11, 2014Assignee: Dai-Ichi Seiko Co., Ltd.Inventors: Takeshi Hirakawa, Yoichi Hashimoto, Takao Yamauchi