Patents by Inventor Tatsuya Hirose
Tatsuya Hirose 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: 20170038424Abstract: A partial discharge measurement device includes: an impulse voltage application unit; a measurement control unit; and first and second partial discharge detection unit. The measurement control unit includes: a first and a second detector level partial discharge counting unit; and a partial discharge resistance evaluation unit. Each of the first and the second detector level partial discharge counting units outputs a first or second detection signal when the first or second detection signal exceeds a predetermined specified value. The partial discharge resistance evaluation unit counts the number of occurrences of partial discharge based on an output from the first and second detector level partial discharge counting unit, and regards the impulse voltage value at which the count value has reached a predetermined value as a partial discharge inception voltage under the repeated impulse voltage application.Type: ApplicationFiled: April 21, 2015Publication date: February 9, 2017Applicants: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, Kabushiki Kaisha Toshiba, TOSHIBA INDUSTRIAL PRODUCTS AND SYSTEMS CORPORATIONInventors: Tomomi IKEGAMI, Tetsuo YOSHIMITSU, Takayuki SAKURAI, Tatsuya HIROSE, Satoshi HIROSHIMA, Yuji YAMAMOTO
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Publication number: 20160260827Abstract: A semiconductor device is configured including a p-type back barrier layer provided over a substrate and formed front a p-type nitride semiconductor in which Mg or Zn is doped, a nitride semiconductor stacked structure provided over the p-type back barrier layer, the nitride semiconductor stacked structure including an electron transit layer and an electron supply layer, a source electrode, a drain electrode and a gate electrode provided over the nitride semiconductor stacked structure, and a groove extending to the p-type back barrier layer.Type: ApplicationFiled: February 15, 2016Publication date: September 8, 2016Applicant: FUJITSU LIMITEDInventors: Masato NISHIMORI, Tatsuya HIROSE, Atsushi YAMADA
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Patent number: 9322881Abstract: An impulse voltage generator uses a predetermined rectangular waveform signal and a high voltage to generate an impulse voltage. The high voltage is obtained by boosting an instruction voltage of the rectangular waveform signal on a per-cycle basis. A partial discharge frequency calculation section receives detection signals based on partial discharges occurring in an object to be measured by the application of the impulse voltage and counts the detection signal on a per-cycle basis as a partial discharge frequency. An application voltage signal observation circuit observes an application voltage signal indicating the impulse voltage applied to the object to be measured. In a first cycle in which the partial discharge frequency reaches a specified frequency or more, a voltage value acquiring section sets, as a partial discharge starting voltage, the peak value of the voltage indicated by the application voltage signal output from the application voltage signal observation circuit.Type: GrantFiled: March 13, 2013Date of Patent: April 26, 2016Assignees: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBAInventors: Takayuki Sakurai, Hiroyuki Ogawa, Tetsuo Yoshimitsu, Tatsuya Hirose, Satoshi Hiroshima
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Patent number: 9279982Abstract: Provided is a support exhibiting excellent weather resistance, which is usable in an outdoor location for a long duration and is a support capable of sufficiently shielding UV radiation; and further provided are a weather-resistant article, a weather-resistant film, and an optical member which exhibit sufficient weather resistance even though receiving influences by heat, light or moisture. Disclosed is a weather-resistant article of the present invention possessing a support and provided thereon, a polymer layer containing a light stabilizer and a UV radiation reflective layer containing plural materials each having a different refractive index, the UV radiation reflective layer provided on the polymer layer.Type: GrantFiled: August 21, 2009Date of Patent: March 8, 2016Assignee: KONICA MINOLTA HOLDINGS, INC.Inventors: Tatsuya Hirose, Soc Man Ho Kimura
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Publication number: 20150372587Abstract: A power supply circuit includes a switching element and a control section. The control section converts back electromotive force generated at the time of the operation of the switching element to optical energy and converts the optical energy to an electrical signal. Furthermore, the control section drives the switching element on the basis of the electrical signal obtained by converting the optical energy. Accordingly, unlike a case where surge energy is regenerated by resonance, there is no need to use a resonant element such as an inductor. As a result, circuit scale is reduced.Type: ApplicationFiled: May 28, 2015Publication date: December 24, 2015Inventors: Tadahiro Imada, Tatsuya Hirose
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Patent number: 9197201Abstract: A signal generator generates a combined signal that is generated only in the period where supply of a pulse signal is effected, a pulse signal whose frequency is of a higher impulse repetition frequency than the frequency of the period setting signal and whose amplitude represents a voltage value that is lower than the high voltage HVDC value. A semiconductor switch accumulates electric charge on a capacitative element by means of the high voltage HVDC from the high voltage generator when the voltage value of the combined signal is lower than the set gate voltage value and generates an impulse voltage whose peak value is the value of the high voltage HVDC, by means of the electric charge that is discharged from the capacitative element when the voltage value of the combined signal exceeds the set gate voltage value.Type: GrantFiled: June 3, 2014Date of Patent: November 24, 2015Assignees: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBAInventors: Hiroyuki Ogawa, Takayuki Sakurai, Tetsuo Yoshimitsu, Tatsuya Hirose, Satoshi Hiroshima, Masayuki Hikita, Masahiro Kozako, Takahisa Ueno
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Patent number: 9048837Abstract: A cascode transistor includes: a first switch; a second switch that has a withstand voltage higher than that of the first switch and is cascade coupled to a drain of the first switch; and a circuit in which a third switch and a capacitor are coupled in series with each other and that is provided between a connection node and a source of the first switch, the connection node being a node at which the first switch and the second switch are coupled to each other.Type: GrantFiled: September 8, 2014Date of Patent: June 2, 2015Assignee: FUJITSU LIMITEDInventors: Tatsuya Hirose, Kazukiyo Joshin
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Publication number: 20150084685Abstract: A cascode transistor includes: a first switch; a second switch that has a withstand voltage higher than that of the first switch and is cascade coupled to a drain of the first switch; and a circuit in which a third switch and a capacitor are coupled in series with each other and that is provided between a connection node and a source of the first switch, the connection node being a node at which the first switch and the second switch are coupled to each other.Type: ApplicationFiled: September 8, 2014Publication date: March 26, 2015Applicant: FUJITSU LIMITEDInventors: Tatsuya Hirose, Kazukiyo Joshin
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Publication number: 20150015303Abstract: An impulse voltage generator uses a predetermined rectangular waveform signal and a high voltage to generate an impulse voltage. The high voltage is obtained by boosting an instruction voltage of the rectangular waveform signal on a per-cycle basis. A partial discharge frequency calculation section receives detection signals based on partial discharges occurring in an object to be measured by the application of the impulse voltage and counts the detection signal on a per-cycle basis as a partial discharge frequency. An application voltage signal observation circuit observes an application voltage signal indicating the impulse voltage applied to the object to be measured. In a first cycle in which the partial discharge frequency reaches a specified frequency or more, a voltage value acquiring section sets, as a partial discharge starting voltage, the peak value of the voltage indicated by the application voltage signal output from the application voltage signal observation circuit.Type: ApplicationFiled: March 13, 2013Publication date: January 15, 2015Applicants: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBAInventors: Takayuki Sakurai, Hiroyuki Ogawa, Tetsuo Yoshimitsu, Tatsuya Hirose, Satoshi Hiroshima
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Publication number: 20140292382Abstract: A signal generator generates a combined signal that is generated only in the period where supply of a pulse signal is effected, a pulse signal whose frequency is of a higher impulse repetition frequency than the frequency of the period setting signal and whose amplitude represents a voltage value that is lower than the high voltage HVDC value. A semiconductor switch accumulates electric charge on a capacitative element by means of the high voltage HVDC from the high voltage generator when the voltage value of the combined signal is lower than the set gate voltage value and generates an impulse voltage whose peak value is the value of the high voltage HVDC, by means of the electric charge that is discharged from the capacitative element when the voltage value of the combined signal exceeds the set gate voltage value.Type: ApplicationFiled: June 3, 2014Publication date: October 2, 2014Applicants: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORP., KABUSHIKI KAISHA TOSHIBAInventors: Hiroyuki Ogawa, Takayuki Sakurai, Tetsuo Yoshimitsu, Tatsuya Hirose, Satoshi Hiroshima, Masayuki Hikita, Masahiro Kozako, Takahisa Ueno
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Patent number: 8765064Abstract: A sterile-substance-supplying apparatus comprising: an atomization unit including a reservoir unit to reserve hydrogen peroxide, and an ultrasound vibrator to impart ultrasound vibration to the reserved hydrogen peroxide to be atomized; an evaporation unit, provided above the reservoir unit, that heats the atomized hydrogen peroxide to be evaporated; a connecting member connecting the evaporation unit and the atomization unit to each other; a hydrogen-peroxide-supply port to allow the hydrogen peroxide to be supplied to the reservoir unit; a carrier-gas-supply port, provided at the connecting member, that allows carrier gas for allowing the atomized hydrogen peroxide to flow to the evaporation unit to be supplied; and a container portion to reserve a substance for transmitting the ultrasound vibration generated by the ultrasound vibrator, and a metal vibrating plate, provided at a bottom portion of the reservoir unit, that transmits to the hydrogen peroxide the ultrasound vibration transmitted through the subType: GrantFiled: March 25, 2010Date of Patent: July 1, 2014Assignee: Panasonic Healthcare Co., Ltd.Inventors: Yasuhiko Yokoi, Jiro Ohnishi, Shinji Fukui, Akifumi Iwama, Hiroshi Yamamoto, Masaki Harada, Tatsuya Hirose
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Publication number: 20140139206Abstract: A voltage detection circuit includes: a transistor; a switch coupled to a drain terminal of the transistor; the drain terminal is coupled to an one end of the switch; a first driver that controls the switch in synchronization with a second driver that drives a gate terminal of the transistor; and a plurality of resistors coupled in series and coupled to an another end of the switch.Type: ApplicationFiled: September 24, 2013Publication date: May 22, 2014Applicant: FUJITSU LIMITEDInventor: Tatsuya Hirose
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Patent number: 8513934Abstract: A switching device compensation circuit performs switching control by applying a control pulse to a control terminal of a switching device. The switching device compensation circuit includes a first threshold voltage change detection unit, a first control signal generating unit, and an amplitude control unit. The first threshold voltage change detection unit detects a change in threshold voltage of the switching device from an output voltage controlled via the switching device. The first control signal generating unit generates a first control signal in accordance with an output of the first threshold voltage change detection unit. The amplitude control unit controls the amplitude of the control pulse in accordance with an output of the first control signal generating unit.Type: GrantFiled: April 19, 2011Date of Patent: August 20, 2013Assignee: Fujitsu LimitedInventor: Tatsuya Hirose
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Patent number: 8152482Abstract: A displacement control valve for a variable displacement compressor. The displacement control valve includes a drive force transmission body, a pressure sensitive chamber, an internal passage, and a valve body. The valve body includes an annular seal which is contactable with a valve seat surface facing toward the first valve body. The drive force transmission body includes a drive rod and a valve body structure having a shaft passage and forming the first valve body. The drive rod is fitted to the shaft passage and coupled to the valve body structure so as to form a gap passage between an outer surface of the drive rod and a wall surface of the shaft passage. The internal passage includes a recess arranged radially inward from the annular seal, the shaft passage, and the gap passage. The gap passage is in direct communication with the recess.Type: GrantFiled: October 23, 2008Date of Patent: April 10, 2012Assignees: Kabushiki Kaisha Toyota Jidoshokki, Eagle Industry Co., Ltd.Inventors: Satoshi Umemura, Tatsuya Hirose, Yuji Hashimoto, Norio Uemura, Ryosuke Cho, Keigo Shirafuji
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Publication number: 20120049827Abstract: A switching device compensation circuit performs switching control by applying a control pulse to a control terminal of a switching device. The switching device compensation circuit includes a first threshold voltage change detection unit, a first control signal generating unit, and an amplitude control unit. The first threshold voltage change detection unit detects a change in threshold voltage of the switching device from an output voltage controlled via the switching device. The first control signal generating unit generates a first control signal in accordance with an output of the first threshold voltage change detection unit. The amplitude control unit controls the amplitude of the control pulse in accordance with an output of the first control signal generating unit.Type: ApplicationFiled: April 19, 2011Publication date: March 1, 2012Applicant: FUJITSU LIMITEDInventor: Tatsuya HIROSE
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Publication number: 20110206422Abstract: Disclosed is an intermediate transfer member that, for example, even when a large number, for example, 160,000 sheets of prints are prepared, does not cause cracking and toner filming, can allow good transfer properties and cleaning properties to be maintained, and can realize stable preparation of toner images having a high quality free from image defects such as lack of text image. In the intermediate transfer member, an elastic layer is provided on the outer circumference of a resin substrate, and a surface layer is provided on the elastic layer. The surface layer has a thickness of 0.5 nm or more but 1000 nm or less and comprises an intermediate layer and a hard layer composed mainly of a metal oxide. The layer density of the hard layer is 2.07 g/cm3 or more but 2.19 g/cm3 or less and is larger than the layer density of the intermediate layer.Type: ApplicationFiled: May 26, 2009Publication date: August 25, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Tatsuya Hirose, Yuichiro Maehara
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Publication number: 20110165394Abstract: Provided is a support exhibiting excellent weather resistance, which is usable in an outdoor location for a long duration and is a support capable of sufficiently shielding UV radiation; and further provided are a weather-resistant article, a weather-resistant film, and an optical member which exhibit sufficient weather resistance even though receiving influences by heat, light or moisture. Disclosed is a weather-resistant article of the present invention possessing a support and provided thereon, a polymer layer containing a light stabilizer and a UV radiation reflective layer containing plural materials each having a different refractive index, the UV radiation reflective layer provided on the polymer layer.Type: ApplicationFiled: August 21, 2009Publication date: July 7, 2011Applicant: KONICA MINOLTA HOLDINGS, INC.Inventors: Tatsuya Hirose, Soc Man Ho Kimura
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Publication number: 20110064958Abstract: Provided are a weather-resistant resin base material and an optical member having satisfactory weather resistance even when affected by heat, light and moisture. The weather-resistant resin base material has on at least one side of a resin base material which contains a light-stabilizer at least one ceramic layer having, as the main component, oxide, oxynitride or nitride containing Si or Al, and the steam permeability (JIS K7129-1992, method B, under conditions of 40° C. and 90% RH) is not more than 0.01 g/(m2·24 h).Type: ApplicationFiled: June 4, 2009Publication date: March 17, 2011Applicant: KONICA MINOLTA HOLDINGS, INC.Inventor: Tatsuya Hirose
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Publication number: 20110027131Abstract: A sterile-substance-supplying apparatus comprising: an atomization unit including a reservoir unit to reserve hydrogen peroxide, and an ultrasound vibrator to impart ultrasound vibration to the reserved hydrogen peroxide to be atomized; an evaporation unit, provided above the reservoir unit, that heats the atomized hydrogen peroxide to be evaporated; a connecting member connecting the evaporation unit and the atomization unit to each other; a hydrogen-peroxide-supply port to allow the hydrogen peroxide to be supplied to the reservoir unit; a carrier-gas-supply port, provided at the connecting member, that allows carrier gas for allowing the atomized hydrogen peroxide to flow to the evaporation unit to be supplied; and a container portion to reserve a substance for transmitting the ultrasound vibration generated by the ultrasound vibrator, and a metal vibrating plate, provided at a bottom portion of the reservoir unit, that transmits to the hydrogen peroxide the ultrasound vibration transmitted through the subType: ApplicationFiled: March 25, 2010Publication date: February 3, 2011Applicant: SANYO ELECTRIC CO., LTD.Inventors: Yasuhiko Yokoi, Jiro Ohnishi, Shinji Fukui, Akifumi Iwama, Hiroshi Yamamoto, Masaki Harada, Tatsuya Hirose
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Patent number: 7806666Abstract: A displacement control valve (32) is connected to a variable displacement compressor. An open passage (53) in which a refrigerant gas flows is formed within a rod (31) and a valve body (30) of the displacement control valve (32). Further, an inner circumferential surface of a valve chamber (36) is formed as a guide portion (40) for moving the valve body (30) along an axis (L1) of the valve chamber (36). A valve portion (30a) of the valve body (30) is formed in a circular arc cross sectional shape along a surface of a sphere (K) in which an intermediate point of a length of the guide portion (40) along the axis (L1) of the valve chamber (36) is set to a center (N) on the axis (L1), and a distance from the center (N) to a contact point between a valve seat (36a) and the valve portion (30a) is set to a radius (r).Type: GrantFiled: June 7, 2006Date of Patent: October 5, 2010Assignee: Eagle Industry Co. Ltd.Inventors: Satoshi Umemura, Yuji Hashimoto, Tatsuya Hirose, Kazutaka Oda, Masataka Taniue, Ryosuke Cho, Keigo Shirafuji, Toshiaki Iwa