Patents by Inventor Masayoshi Takahashi
Masayoshi Takahashi 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: 20140077780Abstract: According to an embodiment, a voltage regulator having an output transistor, a voltage dividing circuit, an error amplifier, a detection circuit and a phase compensation capacitance circuit is provided. The output transistor has one end to which a power supply voltage is supplied, a control terminal to which a control signal is input, and the other end which outputs an output voltage. The voltage dividing circuit is connected between the other end of the output transistor and a first reference voltage. The error amplifier is configured to output the control signal according to the difference between a divided voltage and a second reference voltage. The detection circuit is configured to detect an operation environment. The phase compensation capacitance circuit is configured to adjust a phase compensation capacitance between the other end of the output transistor and an input terminal of the error amplifier, in accordance with the detected operation environment.Type: ApplicationFiled: March 7, 2013Publication date: March 20, 2014Inventors: Hansen TEONG, Masayoshi TAKAHASHI, Hirokazu KADOWAKI, Masatoshi WATANABE, Kenji KANAMARU
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Publication number: 20140077771Abstract: [Problem] To enable effectively utilizing electrical energy of a vehicle and effectively preventing early deterioration of the second electricity storage unit. [Solution] Provided is a vehicle control device for supplying electricity to an electrical load component of a vehicle.Type: ApplicationFiled: May 11, 2012Publication date: March 20, 2014Applicant: MAZDA MOTOR CORPORATIONInventors: Takeharu Yamashita, Masayoshi Takahashi
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Publication number: 20140062502Abstract: A method for identifying EMI sources in a system having a plurality of electrical components connected together by cables wherein each set of two electrical components connected by a cable forms a potential EMI source. A plurality of antennas are positioned around the vehicle and the EMI from each antenna is measured over a plurality of frequencies and the frequencies having an EMI greater than a predetermined threshold and a measurement profile of the received EMI versus the antennas for each of the identified frequencies is created. EMI reception is then simulated for each potential EMI source and a simulation profile of the received EMI versus the antennas is plotted for each potential EMI source. The actual source of the EMI is then identified by comparing the measurement profile with the simulation profile for the potential EMI sources at each frequency to determine a match of the profiles.Type: ApplicationFiled: August 29, 2012Publication date: March 6, 2014Applicant: Hitachi, LtdInventors: Masayoshi Takahashi, Hua Zeng
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Publication number: 20140029068Abstract: An image reading apparatus includes a light source unit, an image sensor, an attenuator, an analog processor and an A/D converter. The attenuator generates a second analog signal by voltage-dividing a first analog signal by two resistors. The analog processor generates a third analog signal by amplifying the second analog signal with a predetermined gain. The A/D converter converts the third analog signal into a digital signal. A voltage-dividing ratio of the attenuator is not higher than a ratio of a maximum value of the amplitude of a signal inputtable to the analog processor to a maximum value of the amplitude of a signal having a possibility of being output from the image sensor.Type: ApplicationFiled: July 24, 2013Publication date: January 30, 2014Applicant: KYOCERA Document Solutions Inc.Inventor: Masayoshi Takahashi
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Publication number: 20130294040Abstract: Radiated noise caused by switching noise of power semiconductor elements in an electrical converter is reduced. The electrical converter is characterized in comprising: a case; a power module mounted on the case and comprising a plurality of power semiconductor elements; a metal plate mounted to the power module and fixed to the case; a control circuit board arranged on the metal plate, for controlling the power semiconductor elements; and a direct-current input terminal electrically connected to a battery. The electrical converter is also characterized in being provided at the bottom with a transmission or motor, and at the top with a connector for connecting the battery and the direct-current input terminal. The electrical converter is further characterized in that the metal plate is curved, and a portion of the curved metal plate is arranged in the space between the control circuit board and the direct-current input terminal.Type: ApplicationFiled: November 25, 2011Publication date: November 7, 2013Applicant: Hitachi Automotive Systems, Ltd.Inventors: Keisuke Fukumasu, Makoto Torigoe, Kenichiro Nakajima, Masayoshi Takahashi, Hiroki Funato
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Patent number: 8498767Abstract: A power-supply control apparatus of a vehicle comprises a first electricity-storage device to supply electric power to a starter for starting engine, a generator to convert kinetic energy of the vehicle during a vehicle deceleration to electric energy for energy recovery, a second electricity-storage device coupled to the generator to store the electric power from the generator thereat, a feeder circuit coupling the second electricity-storage device to an electric load with a relatively-small electric-load capacity via a DC/DC convertor, a coupling line coupling the second electricity-storage device to the first electricity-storage device via a coupling relay, and a controller to control the electric power passing through the feeder circuit and the coupling line, wherein the controller executes a control to make the coupling relay on the coupling line in an OFF state when the starter operates.Type: GrantFiled: May 17, 2012Date of Patent: July 30, 2013Assignee: Mazda Motor CorporationInventors: Kazuya Kotani, Hideki Sanai, Takeharu Yamashita, Masayoshi Takahashi
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Patent number: 8451063Abstract: A circuit having a sensor with a stray capacitance value. An output from the sensor is connected to the input of an amplifier while a negative capacitance circuit is electrically connected in parallel with the sensor output. The negative capacitance circuit reduces the effect of the sensor stray capacitance to provide an increased bandwidth and decreased noise on the amplifier output.Type: GrantFiled: September 29, 2010Date of Patent: May 28, 2013Assignee: Hitachi, Ltd.Inventors: Masayoshi Takahashi, Norio Chujo, Masami Makuuchi
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Patent number: 8447202Abstract: The present invention provides a printing without margins-enabled image forming apparatus that forms toner image matched to the size and position of the conveyed printing material and suppresses waste toner generation. To accomplish this, the present image forming apparatus includes a printing material detection unit that detects orthogonal direction length, conveying direction length, orthogonal direction position, and conveying direction position associated with the conveyed printing material when a printing without margins is selected by the selection unit. In addition, the present image forming apparatus includes a matching unit which, based on the detected length and conveying position, matches the size of the toner image formed on the printing material to the size of the printing material and matches the formation position of the toner image to the position of the printing material conveyed along the conveying path.Type: GrantFiled: February 23, 2007Date of Patent: May 21, 2013Assignee: Canon Kabushiki KaishaInventor: Masayoshi Takahashi
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Publication number: 20130082522Abstract: A system for reducing electromagnetic noise generated by common mode currents in electrical connections of a power inverter and battery in an electric or hybrid electric vehicle. A pair of spaced apart electrical conductors extends along the vehicle chassis and electrically connects the power inverter to the battery. An electrically conductive metal plate is positioned in between the spaced apart electrical conductors. This metal plate is electrically connected to the chassis adjacent at least both of the power inverter and the battery/motor. Besides this, more connecting points are required to keep the distance between two points less than half wavelength of the maximum frequency of EMI requirements, and most preferably this metal plate is electrically connected to the chassis all the way with infinite connecting points. The metal plate is positioned so that the metal plate is closer to the electrical conductors than the space in between the electrical conductors and the vehicle chassis.Type: ApplicationFiled: October 4, 2011Publication date: April 4, 2013Applicant: Hitachi, LtdInventors: Hua Zeng, Masayoshi Takahashi
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Patent number: 8349192Abstract: A method for collapsing a microbubble includes applying stimulation to the microbubble during the gradual decrease of the its size. As a result, the microbubble floating in a solution that decreases in size due to the natural dissolution of a gas contained in the microbubble and disappears after a while, has the speed of its size decrease enhanced and causes the microbubble to disappear.Type: GrantFiled: September 28, 2004Date of Patent: January 8, 2013Assignee: Reo Laboratory Co., Ltd.Inventors: Masayoshi Takahashi, Kaneo Chiba
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Publication number: 20120326799Abstract: There is provided a power conversion apparatus which allows a noise current or voltage to be suppressed at a low cost and in a small size, the noise current or voltage mixing into the power conversion apparatus by propagating through a control wiring connected to an external appliance. The power conversion apparatus includes a housing, connection terminals provided on the housing, a control-circuit unit provided inside the housing, a wiring for establishing the connection between the connection terminals and the control-circuit unit, a first noise-removing unit connected between the wiring and the ground potential of the housing, and a second noise-removing unit connected between the wiring and the ground potential of the housing, and also in parallel to the first noise-removing unit.Type: ApplicationFiled: December 15, 2010Publication date: December 27, 2012Applicant: Hitachi Automotive Systems, Ltd.Inventors: Masayoshi Takahashi, Keisuke Fukumasu, Makoto Torigoe, Tomohiko Suematsu, Satoru Shigeta
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Publication number: 20120312613Abstract: A battery is arranged at a specified position which is located on an outside of a front side frame in a vehicle width direction and between a front wheel and a crush can in a vehicle longitudinal direction. Accordingly, the battery can be positioned properly at a front portion of a vehicle so that the battery may not receive any improper thermal influence from an engine or a motor and not hurt the function of impact absorption in a vehicle frontal collision.Type: ApplicationFiled: December 7, 2011Publication date: December 13, 2012Applicant: MAZDA MOTOR CORPORATIONInventors: Seigo SUZUKI, Akira SONE, Masayoshi TAKAHASHI, Manabu HASHIMOTO, Masanobu FUKUSHIMA, Hiromasa HONJI, Hiroto KIDO
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Publication number: 20120296506Abstract: A power-supply control apparatus of a vehicle comprises a first electricity-storage device to supply electric power to a starter for starting engine, a generator to convert kinetic energy of the vehicle during a vehicle deceleration to electric energy for energy recovery, a second electricity-storage device coupled to the generator to store the electric power from the generator thereat, a feeder circuit coupling the second electricity-storage device to an electric load with a relatively-small electric-load capacity via a DC/DC convertor, a coupling line coupling the second electricity-storage device to the first electricity-storage device via a coupling relay, and a controller to control the electric power passing through the feeder circuit and the coupling line, wherein the controller executes a control to make the coupling relay on the coupling line in an OFF state when the starter operates.Type: ApplicationFiled: May 17, 2012Publication date: November 22, 2012Applicant: MAZDA MOTOR CORPORATIONInventors: Kazuya KOTANI, Hideki SANAI, Takeharu YAMASHITA, Masayoshi TAKAHASHI
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Publication number: 20120249257Abstract: In a vehicle network for controlling electronic devices of the type having a network driver with at least one output line connected to the network through a common mode choke. A circuit for improving the immunity of the network includes a resistor and a capacitor connected in series between the signal output line and ground. The series resistor and capacitor protect the network from communication errors.Type: ApplicationFiled: March 30, 2011Publication date: October 4, 2012Applicant: Hitachi, Ltd.Inventors: Masayoshi Takahashi, Hua Zeng
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Publication number: 20120075021Abstract: A circuit having a sensor with a stray capacitance value. An output from the sensor is connected to the input of an amplifier while a negative capacitance circuit is electrically connected in parallel with the sensor output. The negative capacitance circuit reduces the effect of the sensor stray capacitance to provide an increased bandwidth and decreased noise on the amplifier output.Type: ApplicationFiled: September 29, 2010Publication date: March 29, 2012Applicant: Hitachi, LtdInventors: Masayoshi Takahashi, Norio Chujo, Masami Makuuchi
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Publication number: 20120075647Abstract: An image reading apparatus includes a light-emitting device having a peak wavelength that varies depending on a value of a drive current, and illuminates a document with illumination light from the light-emitting device. A light receiving unit receives a light reflected from the document when the illumination light is emitted from the light-emitting device, and converts the received reflected light into image data at a predetermined sensitivity depending on the wavelengths of the received light. A current drive circuit supplies the drive current to turn on the light-emitting device. A wavelength distribution control unit produces two or more durations each having a different value of the drive current by controlling the current drive circuit during each main scanning to the document to produce two or more durations each having a different peak wavelength in each main scanning.Type: ApplicationFiled: September 23, 2011Publication date: March 29, 2012Applicant: KYOCERA MITA CORPORATIONInventor: Masayoshi Takahashi
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Patent number: 8137703Abstract: The present invention relates to an ozone water that has the potential to find useful applications in a wide variety of technical fields and is capable of maintaining the effects of wiping out microorganisms such as bacteria, viruses and the like and inhibiting the growth thereof over long periods. The present invention provides ozone nano-bubbles capable of staying in a solution for an extended period of time and a method for producing the ozone nano-bubbles by instantaneously shrinking the diameters of ozone microbubbles contained in an aqueous solution by the application of a physical irritation to the ozone microbubbles in an aqueous solution.Type: GrantFiled: February 28, 2005Date of Patent: March 20, 2012Assignees: REO Laboratory Co., Ltd., National Institute of AISTInventors: Kaneo Chiba, Masayoshi Takahashi
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Patent number: 8128782Abstract: The present invention provides an amine based epoxy resin curing agent and an epoxy resin composition containing the curing agent. The epoxy resin composition has a high gas barrier performance, a long pot life, and utility as a coating material or an adhesive for laminates.Type: GrantFiled: May 20, 2008Date of Patent: March 6, 2012Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Shinichi Yonehama, Shigeyuki Hirose, Shinichi Ayuba, Eiichi Honda, Masayoshi Takahashi, Kana Kumamoto
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Patent number: 8035071Abstract: The detection part has: a subtraction module for calculating correction data from data of detection systems when a reference-voltage generation module applies a reference voltage to the detection systems; a data-holding module for holding the correction data; an addition module for making a correction of detection data; a comparison module for comparing the detection data with switching data; and a selector for switching data of the detection systems including data subjected to the correction according to the output of the comparison module.Type: GrantFiled: May 7, 2008Date of Patent: October 11, 2011Assignee: Hitachi High-Technologies CorporationInventors: Masami Makuuchi, Ritsurou Orihashi, Masayoshi Takahashi, Wen Li, Kengo Imagawa, Takahiro Jingu
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Patent number: 8000047Abstract: The present invention provides a technique for converting burst data to digital data, applying FFT operation to 2n (n is an integer) pieces of digital data in response to any start signal synchronized with a sector signal, applying a window function centered around data corresponding to a frequency of a burst data signal component before the FFT operation, and performing head positioning based on a result as the detected value of the burst data.Type: GrantFiled: July 16, 2009Date of Patent: August 16, 2011Assignee: Hitachi High-Technologies CorporationInventors: Masayoshi Takahashi, Masami Makuuchi, Shinji Homma, Yoshihiro Sakurai