Patents by Inventor Takeshi Ueno
Takeshi Ueno 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: 20140340061Abstract: A DC-DC converter control circuit has an inductor configured to be interposed between a first node which is set to a first direct current voltage or a second direct current voltage and a second node which outputs an output voltage at a predetermined direct current voltage level, an error signal generator configured to generate an error signal depending on a voltage difference between a reference voltage and a voltage correlating with the output voltage, a ripple extractor configured to extract and output ripple components contained in the voltage of the first node, a single-ended signal generator configured to generate a single-ended signal based on the error signal and an output signal from the ripple extractor, and a switch drive unit configured to drive and control, based on the single-ended signal, a switch circuit which sets the first node to the first direct current voltage or the second direct current voltage.Type: ApplicationFiled: March 6, 2014Publication date: November 20, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Takeshi UENO
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Publication number: 20140241021Abstract: An inverter control circuit has a quantizer configured to generate a switching signal which changes over switches of a main circuit converting a DC voltage into an AC voltage, and a filter circuit configured to generate a signal having specific transfer characteristic by using a signal correlated with an output voltage of an LC filter which smooths the AC voltage and an instruction signal corresponding to a target value of an output voltage of the main circuit, wherein the quantizer generates the switching signal by quantizing an output signal of the filter circuit.Type: ApplicationFiled: January 31, 2014Publication date: August 28, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takeshi Ueno, Tetsuro Itakura, Ikuya Aoyama
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Publication number: 20140115040Abstract: A communication system includes: a plurality of servers (12); a customer premises equipment (2); a NAT router (3); and a polling server (11) that, in a case of having received a query signal from the customer premises equipment (2) after having received a communication request for the customer premises equipment (2) from each of the servers (12), returns a response signal including an effect of having received the communication request from the server (12), wherein, in a case of having received, from the polling server (11), the response signal including the effect of having received the communication request from the server (12), the customer premises equipment (2) starts communication with the server (12) that has transmitted the communication request. Even in a case where such a requests a plurality of services, a communication traffic volume of polling communication can be suppressed.Type: ApplicationFiled: June 20, 2012Publication date: April 24, 2014Applicant: PANASONIC CORPORATIONInventor: Takeshi UENO
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Publication number: 20140092098Abstract: When a French character is selected while an English character string candidate is presented, a mobile terminal presents English and French character string candidates by using an English/French mixed candidate dictionary. Furthermore, when a French character is selected while English and French character string candidates are presented by using the English/French mixed candidate dictionary, the mobile terminal presents a French character string candidate by using a French candidate dictionary. Moreover, when a character other than French is selected while a French character string candidate is presented by using the French candidate dictionary, the mobile terminal presents an English character string candidate by using an English candidate dictionary.Type: ApplicationFiled: July 23, 2013Publication date: April 3, 2014Applicant: FUJITSU LIMITEDInventors: Nao HORIGUCHI, Ena Watanabe, Masashi Tanimura, Kota Ariyama, Takeshi Ueno, Katsuaki Akama
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Publication number: 20140046497Abstract: According to some embodiments, there is provided a controller that performs communication with a plurality of power supply units each of which outputs electric power to a load. The controller includes a receiving unit, a control information generating unit and a transmitting unit. The receiving unit receives operation information from the power supply units by radio, the operation information being information on electric power output to the load from the power supply units, respectively. The control information generating unit generates control information to control the power supply units based on the operation information. The transmitting unit transmits the control information to the power supply units by radio.Type: ApplicationFiled: August 6, 2013Publication date: February 13, 2014Applicant: Kabushiki Kaisha ToshibaInventors: Takeshi UENO, Tetsuro ITAKURA, Takafumi SAKAMOTO, Toshihisa NABETANI
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Publication number: 20130328536Abstract: A DC-DC converter converts an input voltage into an output voltage and includes an input terminal, an output terminal, a power stage, a switch driving circuit, a charge pump, and a capacitor. The power stage includes a high-side switch, a low-side switch and an inductor. The switch driving circuit generates a high-side switch driving signal and a low-side switch driving signal. The charge pump generates a first polarity current according to the high-side switch driving signal, and generates a second polarity current having an opposite polarity to the first polarity current according to the low-side switch driving signal. The capacitor generates a first voltage by integrating the first and second polarity currents generated by the charge pump. The switch driving circuit generates the high-side switch driving signal and the low-side switch driving signal according to a difference between the first voltage and a reference voltage.Type: ApplicationFiled: June 4, 2013Publication date: December 12, 2013Inventors: Takeshi UENO, Tetsuro ITAKURA
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Patent number: 8604766Abstract: A control circuit of a DC-DC converter has a voltage difference signal generator configured to generate a digital voltage difference signal depending on a voltage difference between the output voltage and a reference voltage, a PID controller configured to generate a digital PID signal for determining the duty ratio of the pulse-width modulated signal, based on the digital voltage difference signal, a phase controller configured to generate a digital phase control signal for determining a phase of the pulse-width modulated signal, based on the digital voltage difference signal, and a PWM generator configured to generate the pulse-width modulated signal, based on the digital PID signal and the digital phase control signal.Type: GrantFiled: December 3, 2012Date of Patent: December 10, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Kei Shiraishi, Takeshi Ueno, Taichi Ogawa, Tetsuro Itakura
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Publication number: 20130249517Abstract: A control circuit of a DC-DC converter has a voltage difference signal generator configured to generate a digital voltage difference signal depending on a voltage difference between the output voltage and a reference voltage, a PID controller configured to generate a digital PID signal for determining the duty ratio of the pulse-width modulated signal, based on the digital voltage difference signal, a phase controller configured to generate a digital phase control signal for determining a phase of the pulse-width modulated signal, based on the digital voltage difference signal, and a PWM generator configured to generate the pulse-width modulated signal, based on the digital PID signal and the digital phase control signal.Type: ApplicationFiled: December 3, 2012Publication date: September 26, 2013Inventors: Kei SHIRAISHI, Takeshi UENO, Taichi OGAWA, Tetsuro ITAKURA
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Publication number: 20130241289Abstract: A control circuit of a switching power supply device has a first current source capable of supplying an auxiliary current to a load resistance of the switching power supply device when a load current flowing through the load resistance increases, a second current source capable of pulling in a current from the load resistance when the load current flowing through the load resistance decreases, and an auxiliary current controller configured to activate the first current source or the second current source from when a variation in the load current flowing through the load resistance is detected to have exceeded a predetermined level until a current flowing through the inductor becomes equal to the current flowing through the load resistance.Type: ApplicationFiled: December 3, 2012Publication date: September 19, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Taichi OGAWA, Takeshi UENO, Tetsuro ITAKURA
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Patent number: 8410762Abstract: The high-side switch has one end connected to the input terminal. The low-side switch has one end connected to other end of the high-side switch and other end connected to a ground terminal. The inductor has one end connected to the other end of the high-side switch and other end connected to the output terminal. The capacitor has one end connected to the other end of the inductor and other end connected to the ground terminal. The high-side switch controlling circuit generates and supplies a high-side switch controlling signal based on a target voltage of the output terminal, the output voltage of the output terminal, and a current flowing through the capacitor, to the high-side switch. The low-side switch controlling circuit generates and supplies a low-side switch controlling signal based on the high-side switch controlling signal and a current flowing through the inductor, to the low-side switch.Type: GrantFiled: November 29, 2011Date of Patent: April 2, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Takeshi Ueno, Tetsuro Itakura
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Publication number: 20130049712Abstract: There is provided a DC-DC converter which converts an input voltage into an output voltage for supply to a load, in which an input terminal receives the input voltage, an output terminal outputs the output voltage, power stages each includes: a high side switch, a low side switch and an inductor, the control unit executes a first mode and a second mode wherein the first mode controls the high side switch and the low side switch in each of the power stages so that a ratio of an output current in each of the power stages to a load current flowing through the load becomes a set value and the second mode controls the high side switch and the low side switch in each of the power stages so that duty ratios of the high side switch and the low side switch are equalized among the power stages.Type: ApplicationFiled: June 8, 2012Publication date: February 28, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Takeshi UENO
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Patent number: 8350547Abstract: A DC to DC converter includes an input terminal, an output terminal, first and second switches, an inductor, a smoothing unit, a first impedance element, a first resistor element, an operational amplifier and a control unit. The first switch is connected to the input terminal. The second switch is connected to the first switch and a ground terminal. The inductor is connected to the first switch and the output terminal. The smoothing unit is connected to the inductor and the ground terminal. The first impedance element is connected to the smoothing unit. The first resistor element is connected in series with the first impedance element. The operational amplifier is connected to the first impedance element. Reference voltage is added to the operational amplifier. The control unit controls the first and second switches according to a control signal outputted from the operational amplifier.Type: GrantFiled: September 9, 2010Date of Patent: January 8, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Takeshi Ueno, Tetsuro Itakura
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Publication number: 20130002034Abstract: According to one embodiment, a wireless power transmitter wirelessly transmits power to a power receiving apparatus which includes a first resonance circuit and a load circuit. The first resonance circuit includes a power receiving coil and a first capacitor. The wireless power transmitter comprises a second resonance circuit that includes a power transmission coil and a second capacitor and transmits the signal generated by a power supply to the power receiving apparatus, a measuring unit that measures a signal reflection coefficient, and a controller. The controller detects a value of an oscillation frequency of the power supply making the signal reflection coefficient smaller than or equal to a threshold value, calculates an electromagnetic coupling coefficient between the power transmission coil and the power receiving coil, and controls one of the oscillation frequency and a capacitance value of the second capacitor based on the electromagnetic coupling coefficient.Type: ApplicationFiled: January 3, 2012Publication date: January 3, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kohei Onizuka, Takeshi Ueno
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Patent number: 8277254Abstract: A dual wiring system with easy exchangeability of a function unit. A gate device is mounted in a wall surface of a structure, and connected to both of an electric power line and an information line previously installed in the structure. The function unit has at least one of functions for supplying electric power from the electric power line, outputting information from the information line and inputting information into the information line when connected with the gate device. The function unit has a module connector including an electric power connector and an information signal connector, which is detachably connected to a module port of the gate device comprised of an electric power port and an information signal port. To further improve function expandability, an additional function unit can be detachably connected to the function unit.Type: GrantFiled: December 22, 2005Date of Patent: October 2, 2012Assignee: Panasonic CorporationInventors: Masahiro Yamamoto, Takeshi Ueno, Kazufumi Oogi, Kenichi Yoneyama, Hideshi Hamaguchi
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Publication number: 20120242310Abstract: The high-side switch has one end connected to the input terminal. The low-side switch has one end connected to other end of the high-side switch and other end connected to a ground terminal. The inductor has one end connected to the other end of the high-side switch and other end connected to the output terminal. The capacitor has one end connected to the other end of the inductor and other end connected to the ground terminal. The high-side switch controlling circuit generates and supplies a high-side switch controlling signal based on a target voltage of the output terminal, the output voltage of the output terminal, and a current flowing through the capacitor, to the high-side switch. The low-side switch controlling circuit generates and supplies a low-side switch controlling signal based on the high-side switch controlling signal and a current flowing through the inductor, to the low-side switch.Type: ApplicationFiled: November 29, 2011Publication date: September 27, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takeshi UENO, Tetsuro ITAKURA
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Publication number: 20120242300Abstract: A DC-DC converter control apparatus controls a DC-DC converter which has an inductor connected between an input terminal for a direct-current input voltage and an output terminal for a direct-current output voltage obtained by converting the direct-current input voltage, a capacitor connected to the inductor, and a switch configured to switch whether the direct-current input voltage is applied to the inductor. The DC-DC converter control apparatus has a subtractor configured to generate a differential voltage between the direct-current input voltage and a reference voltage, a comparator configured to generate a determining signal that indicates determination of a polarity of the differential voltage, and a delay part configured to delay the determining signal for a specific delay time.Type: ApplicationFiled: September 16, 2011Publication date: September 27, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takeshi Ueno, Akio Kuroda
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Publication number: 20120235509Abstract: In one embodiment, a power reception device includes a load circuit, to which a first signal having a first power value is supplied from a first resonance circuit connected to a power reception coil, and a first transceiver which transmits the first power value to a power transmission device. The power transmission device includes a second resonance circuit including a plurality of inductors and capacitors to which a second signal having a second power value is input, a power transmission coil connected to the second resonance circuit, a second transceiver which receives the first power value from the first transceiver, and a first control circuit which calculates power transmission efficiency using the first power value and the second power value and adjusts at least one of inductance values of the inductors and/or at least one of capacitance values of the capacitors based on the power transmission efficiency.Type: ApplicationFiled: May 1, 2012Publication date: September 20, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takeshi UENO, Kohei ONIZUKA
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Patent number: 8238755Abstract: A dual wiring system with improved function expandability is provided. A base unit is mounted in a wall surface of a structure, and connected to both of an electric power line and an information line previously installed in the structure. Each of function units has at least one of functions for providing electric power from the electric power line, outputting information from the information line and inputting information into the information line when connected with the base unit. The base unit is detachably connected with one of the function units by use of a joining member, so that electric power is supplied from the base unit to the function unit through a power transmission means, and a signal transmission between the base unit and the function unit is obtained through a signal transmission means.Type: GrantFiled: December 22, 2005Date of Patent: August 7, 2012Assignee: Panasonic CorporationInventors: Masahiro Yamamoto, Takeshi Ueno, Kazufumi Oogi, Kenichi Yoneyama, Hideshi Hamaguchi
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Patent number: 8213882Abstract: A common resistor is connected to load impedances that convert differential currents respectively generated by current sources into differential voltages. A constant current generated by the current sources is supplied to the common resistor to cause the common resistor to generate an in-phase current and set a common potential.Type: GrantFiled: March 16, 2010Date of Patent: July 3, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Takashi Ueno, Takeshi Ueno, Takeshi Miyaba
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Publication number: 20120133346Abstract: The SAR control circuit of the successive approximation register A/D converter changes the digital value by the first conversion frequency in a first conversion range according to the comparison result signal, and outputs the digital value. When it is determined that the sample and hold value is out of the first conversion range according to the determination signal, the range setting circuit sets a second conversion range different from the first conversion range.Type: ApplicationFiled: March 22, 2011Publication date: May 31, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Taichi Ogawa, Takeshi Ueno, Masanori Furuta, Takakazu Yoshida