Patents by Inventor Hiroshi Nakao
Hiroshi Nakao 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: 9069537Abstract: A power supply switching apparatus includes a controller and a switch. The controller includes a first comparator, an integrator circuit and a second comparator. The first comparator is configured to output a binary signal having a level corresponding to a magnitude of a signal input from the power supply being connected thereto. The integrator circuit is configured to integrate an output from the first comparator. The second comparator is configured to output a binary signal having a level corresponding to a magnitude of a single input from the integrator circuit. The switch has an input side connected to the first and the second power supply and is configured to switch an outputting current between a current supplied from the first power supply and a current supplied from the second power supply in accordance with a value of the signal output from the second comparator.Type: GrantFiled: September 10, 2012Date of Patent: June 30, 2015Assignee: FUJITSU LIMITEDInventor: Hiroshi Nakao
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Publication number: 20150048686Abstract: A power supply unit includes: a relay that includes a first input terminal to which primary alternating-current power is input and a second input terminal to which secondary alternating-current power is input, and outputs one of the primary alternating-current power and the secondary alternating-current power; a first power conversion unit that is coupled to an output terminal of the relay, and converts alternating-current power output from the relay, into direct-current power; a second power conversion unit that is coupled to an output side of the first power conversion unit and converts output power of the first power conversion unit into direct-current power of a predetermined voltage; a power output terminal that outputs the direct-current power converted by the second power conversion unit; and a control unit that couples the first input terminal to the output terminal or couples the second input terminal to the output terminal.Type: ApplicationFiled: July 16, 2014Publication date: February 19, 2015Inventor: Hiroshi NAKAO
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Publication number: 20140368059Abstract: A transformer includes a core, a coil wound around the core, and a heat sink coupled to the coil. An electronic apparatus includes: a transformer that includes a core, a coil wound around the core, and a heat sink coupled to the coil; a temperature sensor that measures a temperature of the heat sink; and a controller that controls power to be supplied to the coil based on the temperature measured by the temperature sensor.Type: ApplicationFiled: May 19, 2014Publication date: December 18, 2014Applicant: FUJITSU LIMITEDInventors: Takahiko SUGAWARA, Hiroshi Nakao
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Publication number: 20140265498Abstract: A vehicle seat having an upwardly-foldable seat cushion that includes an engagement piece projecting from the rear end of the seat cushion and an under cover below the seat having an upper panel portion having an upwardly sloped surface. A forwardly-and-rearwardly extending guide groove formed in that upper panel portion which allows the engagement piece to be moved therein, without its contact with the upwardly sloped surface of the upper panel portion, when the rear end of the seat cushion is slidingly brought to a lower end of a set back. Ribs are formed in a bottom surface of the guide groove. The guide groove allows forward-and-rearward movement of the engagement piece therein, so that the engagement piece can be pressed against and frictionally engaged with the lower end of the seat back, without being caught by the upwardly sloped surface of the upper panel portion.Type: ApplicationFiled: March 25, 2013Publication date: September 18, 2014Inventors: Hideya Shiotani, Yoshikazu Kijima, Hiroshi Nakao, Taichi Yokoyama
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Publication number: 20140169051Abstract: A power supply device includes: a first serial circuit coupled between a first output terminal and a second output terminal, and including a first switching element and a first rectification element; a second serial circuit coupled between the first output terminal and the second output terminal, and including a second switching element and a second rectification element; a third switching element inserted between a connection point between a first inductor and a first input terminal, and a second output terminal; a fourth switching element inserted between a connection point between a second inductor and a second input terminal, and the second output terminal; a control circuit configured to control the first and second switching elements; and a synchronous rectification control circuit configured to control the third and fourth switching elements.Type: ApplicationFiled: October 29, 2013Publication date: June 19, 2014Applicant: FUJITSU LIMITEDInventors: Hiroshi NAKAO, Yu Yonezawa, Yoshiyasu Nakashima
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Patent number: 8749210Abstract: A power supply device includes: a first serial circuit coupled between a first output terminal and a second output terminal, and including a first switching element and a first rectification element; a second serial circuit coupled between the first output terminal and the second output terminal, and including a second switching element and a second rectification element; a third switching element inserted between a connection point between a first inductor and a first input terminal, and a second output terminal; a fourth switching element inserted between a connection point between a second inductor and a second input terminal, and the second output terminal; a control circuit configured to control the first and second switching elements; and a synchronous rectification control circuit configured to control the third and fourth switching elements.Type: GrantFiled: October 29, 2013Date of Patent: June 10, 2014Assignee: Fujitsu LimitedInventors: Hiroshi Nakao, Yu Yonezawa, Yoshiyasu Nakashima
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Patent number: 8698547Abstract: A control circuit includes: a first switching element having a source, a gate, and a drain; a battery configured to supply a voltage to the gate through a second switching element; a PWM signal generator circuit configured to supply a PWM signal to the gate through a third switching element; and a gate control circuit configured to, under a power-off condition, turn on the second switching element to supply the voltage of the battery to the gate and turns off the third switching element, and configured to under a power-on condition, turn on the third switching element to supply the PWM signal voltage to the gate and turns off the second switching element.Type: GrantFiled: September 21, 2012Date of Patent: April 15, 2014Assignee: Fujitsu LimitedInventor: Hiroshi Nakao
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Patent number: 8665196Abstract: A display apparatus including: a pixel section having a plurality of pixel circuits arranged two-dimensionally by being each provided at an intersection of a scan line and a signal line as a circuit including a switching device, a display element and a storage capacitor; and a correction circuit for correcting a storage-capacitor voltage supplied to the storage capacitors, wherein the correction circuit employs a comparator for detecting the difference between electric potentials received from a portion of the pixel section as a pixel electric potential having a positive polarity and a pixel electric potential having a negative polarity and for comparing the difference in electric potential with a reference voltage, and an output-voltage control circuit for converting a comparison result output by the comparator into a correction signal used for correcting the storage-capacitor voltage to be asserted on a storage-capacitor line used for supplying the storage-capacitor voltage.Type: GrantFiled: August 25, 2008Date of Patent: March 4, 2014Assignee: Japan Display West Inc.Inventors: Tomoyuki Fukano, Toshihiko Orii, Hiroshi Nakao, Naoyuki Itakura
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Patent number: 8470421Abstract: [Problem] To provide a polylactic acid bottle having a vacuum-evaporated film on the inner surface of the bottle wall, effectively preventing the thermal deformation of the bottle at the time of forming the film and exhibiting excellent barrier property against oxygen and water. [Means for Solution] A biodegradable resin bottle has a wall formed by a biodegradable resin and a vacuum-evaporated film on an inner surface of the wall by a plasma CVD method, and wherein said vapor-evaporated film exhibits hydrocarbon peaks stemming from CH, CH2 and CH3 in a region of a wave number of 3200 to 2600 cm?1 as measured by FT-IR, and per the sum of CH, CH2 and CH3 calculated from the hydrocarbon peaks, a CH2 ratio is not larger than 35% and a CH3 ratio is not smaller than 40%.Type: GrantFiled: June 5, 2008Date of Patent: June 25, 2013Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Takuro Ito, Hiroki Mori, Hiroshi Nakao, Kazuhiko Yamazaki
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Publication number: 20130080798Abstract: A power supply switching apparatus includes a controller and a switch. The controller includes a first comparator, an integrator circuit and a second comparator. The first comparator is configured to output a binary signal having a level corresponding to a magnitude of a signal input from the power supply being connected thereto. The integrator circuit is configured to integrate an output from the first comparator. The second comparator is configured to output a binary signal having a level corresponding to a magnitude of a single input from the integrator circuit. The switch has an input side connected to the first and the second power supply and is configured to switch an outputting current between a current supplied from the first power supply and a current supplied from the second power supply in accordance with a value of the signal output from the second comparator.Type: ApplicationFiled: September 10, 2012Publication date: March 28, 2013Applicant: FUJITSU LIMITEDInventor: Hiroshi NAKAO
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Publication number: 20130063996Abstract: A power supply apparatus includes: an input terminal to which alternating current power is input; a positive terminal and a negative terminal at which direct-current power is output; a rectifier circuit configured to rectify the alternating current power input to the input terminal; an inductor coupled to the rectifier circuit; a capacitor coupled between the positive terminal and the negative terminal; a first rectifying element coupled between an output terminal of the inductor and the positive terminal; a first switching element coupled between an input terminal of the first rectifying element and the negative terminal; a second switching element and a transformer coupled in parallel to the first switching element; a second rectifying element coupled between the positive terminal and a coupling portion of the second switching element and the transformer; and a third rectifying element coupled between the transformer and the positive terminal.Type: ApplicationFiled: August 24, 2012Publication date: March 14, 2013Applicant: FUJITSU LIMITEDInventor: Hiroshi NAKAO
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Patent number: 8299728Abstract: An embodiment of the invention provides a precharge controlling method, including the steps of: providing a voltage generating circuit with an output circuit for outputting a voltage having a necessary level, and a comparator; judging an output voltage from the output circuit in the comparator during a precharge time period, and feeding back an output signal from the comparator to the output circuit; and controlling a precharge voltage until the voltage having the necessary level outputted from the output circuit is reached.Type: GrantFiled: August 25, 2008Date of Patent: October 30, 2012Assignee: Sony CorporationInventor: Hiroshi Nakao
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Patent number: 8133562Abstract: A plastic formed article comprising a plastic substrate and a vapor deposited film formed on the surface of the plastic substrate by a plasma CVD method, wherein the vapor deposited film includes an organometal vapor deposited layer having an element ratio C/Si of 2.5 to 13 and an element ratio O/M of not larger than 0.5, and a hydrocarbon vapor deposited layer; and the hydrocarbon vapor deposited layer has a thickness in a range of 40 to 180 nm, exhibits peaks stemming from CH, CH2 and CH3 over a region of wave numbers of 3200 to 2600 cm?1 as measured by FT-IR, and has a CH2 ratio of not larger than 35% and a CH3 ratio of not less than 40%. A film is deposited on a plastic formed article without deteriorated by oxidation, without thermally deformed or without thermally deteriorated not only when PET or polyolefin is used but also when polylactic acid is used as the plastic substrate.Type: GrantFiled: July 26, 2007Date of Patent: March 13, 2012Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Takurou Ito, Hiroki Mori, Hiroshi Nakao, Kazuhiko Yamazaki
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Publication number: 20100244782Abstract: A battery state monitoring portion intermittently monitors the low voltage battery for supplying power to electrical components arranged in a vehicle while the power supply to the low voltage system load other than a +B load is stopped, a DCDC converter is stopped, and a +B power supply mode in which the vehicle cannot travel is set. A charging control portion starts up the DCDC converter and charges the low voltage battery with the power of a high voltage battery as a power source of the vehicle through the DCDC converter when the voltage of the low voltage battery becomes lower than or equal to a charging start voltage when the +B power supply mode is set. The present invention can be applied to a charging device of a battery of an electric vehicle.Type: ApplicationFiled: February 26, 2010Publication date: September 30, 2010Applicant: OMRON CORPORATIONInventors: Keiichi Nagayama, Hiroyuki Sueyasu, Yusaku Ido, Naoki Hirobe, Koji Hachiya, Hiroshi Nakao
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Publication number: 20100140205Abstract: [Problem] To provide a polylactic acid bottle having a vacuum-evaporated film on the inner surface of the bottle wall, effectively preventing the thermal deformation of the bottle at the time of forming the film and exhibiting excellent barrier property against oxygen and water. [Means for Solution] A biodegradable resin bottle has a wall formed by a biodegradable resin and a vacuum-evaporated film on an inner surface of the wall by a plasma CVD method, and wherein said vapor-evaporated film exhibits hydrocarbon peaks stemming from CH, CH2 and CH3 in a region of a wave number of 3200 to 2600 cm?1 as measured by FT-IR, and per the sum of CH, CH2 and CH3 calculated from the hydrocarbon peaks, a CH2 ratio is not larger than 35% and a CH3 ratio is not smaller than 40%.Type: ApplicationFiled: June 5, 2008Publication date: June 10, 2010Applicant: TOYO SEIKAN KAISHA, LTD.Inventors: Takuro Ito, Hiroki Mori, Hiroshi Nakao, Kazuhiko Yamazaki
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Publication number: 20100112252Abstract: A plastic formed article comprising a plastic substrate and a vapor deposited film formed on the surface of the plastic substrate by a plasma CVD method, wherein the vapor deposited film includes an organometal vapor deposited layer having an element ratio C/Si of 2.5 to 13 and an element ratio O/M of not larger than 0.5, and a hydrocarbon vapor deposited layer; and the hydrocarbon vapor deposited layer has a thickness in a range of 40 to 180 nm, exhibits peaks stemming from CH, CH2 and CH3 over a region of wave numbers of 3200 to 2600 cm?1 as measured by FT-IR, and has a CH2 ratio of not larger than 35% and a CH3 ratio of not less than 40%. A film is deposited on a plastic formed article without deteriorated by oxidation, without thermally deformed or without thermally deteriorated not only when PET or polyolefin is used but also when polylactic acid is used as the plastic substrate.Type: ApplicationFiled: July 26, 2007Publication date: May 6, 2010Applicant: Toyo Seikan Kaisha, Ltd.Inventors: Takurou Ito, Hiroki Mori, Hiroshi Nakao, Kazuhiko Yamazaki
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Patent number: 7698777Abstract: A vacuum cleaner includes an electric blower, an electric blower controller for controlling the electric blower, an electric blower current detector for detecting at least a current flowing in the electric blower, and a dust chamber provided at an upstream of the electric blower, for collecting dust particles sucked by the electric blower. A predetermined level of a current is made to flow in the electric blower regardless of a dust particle amount in the dust chamber. Preferably, the vacuum cleaner further includes voltage detector for detecting a voltage of a power supply applied to the vacuum cleaner. More preferably, the vacuum cleaner further includes a frequency detector for detecting a frequency of a power supply applied to the vacuum cleaner.Type: GrantFiled: February 28, 2006Date of Patent: April 20, 2010Assignee: Panasonic CorporationInventors: Tosiaki Fujiwara, Hiroshi Nakao, Masaki Takahashi, Nobuhiro Hayasi
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Patent number: 7629021Abstract: The object of the present is to provide high-quality magnetic recording media capable of easy tracking, and allowing high-density recording, high-speed recording, and higher capacity without increasing the write-current at magnetic heads. The nanohole structure comprises a metal or metal-compound base material and plural arrays of nanoholes, wherein the plural arrays of nanoholes are respectively arranged into regular alignments, the regular alignments are different between adjacent arrays, and the regular alignments are alternately disposed within the metal or metal-compound base material. The magnetic recording medium according to the present invention comprises a substrate, a porous layer into which plural nanoholes are formed, and a magnetic material within the plural nanoholes, wherein the plural nanoholes are formed in a direction approximately vertical to the plane of the substrate, the porous layer is a nanohole structure according to the present invention.Type: GrantFiled: October 26, 2005Date of Patent: December 8, 2009Assignee: Yamagata Fujitsu LimitedInventor: Hiroshi Nakao
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Publication number: 20090147405Abstract: A method for manufacturing a magnetic recording medium which has a substrate and a magnetic layer formed on the substrate, the method including: forming the magnetic layer over a convexo-concave pattern provided on a surface of a mold, and releasing the mold from the magnetic layer formed on the substrate.Type: ApplicationFiled: December 2, 2008Publication date: June 11, 2009Applicants: FUJITSU LIMITED, KANAGAWA ACADEMY OF SCIENCE AND TECHNOLOGYInventors: Hirotaka Oshima, Hideyuki Kikuchi, Takeshi Morikawa, Hiroshi Nakao, Ken-ichi Itoh, Hideki Masuda, Kazuyuki Nishio
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Publication number: 20090058324Abstract: An embodiment of the invention provides a precharge controlling method, including the steps of: providing a voltage generating circuit with an output circuit for outputting a voltage having a necessary level, and a comparator; judging an output voltage from the output circuit in the comparator during a precharge time period, and feeding back an output signal from the comparator to the output circuit; and controlling a precharge voltage until the voltage having the necessary level outputted from the output circuit is reached.Type: ApplicationFiled: August 25, 2008Publication date: March 5, 2009Applicant: SONY CORPORATIONInventor: Hiroshi Nakao