Patents by Inventor Masafumi Yamamoto
Masafumi Yamamoto 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: 8786201Abstract: An LED lighting device includes a power converter for outputting a variable output voltage, two LED lamps being connected in series between output terminals of the power converter; a current detector for detecting an output current from the power converter; a first detector for detecting the output voltage of the power converter and generating a first detection voltage corresponding to the output voltage; a second detector for detecting an applied voltage to one of the two LED lamps and generating a second detection voltage corresponding to the applied voltage; and a controller for controlling the power converter to adjust the output voltage to thereby make the output current coincide with a target value. The controller controls the power converter to decrease the output voltage if at least one of the second detection voltage and the deference between the first and the second detection voltage does not fall within a range.Type: GrantFiled: December 15, 2011Date of Patent: July 22, 2014Assignee: Panasonic CorporationInventors: Katunobu Hamamoto, Masafumi Yamamoto, Keisuke Ueda, Hisaya Takikita
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Publication number: 20140179477Abstract: A vehicle using a first MG, a second MG, and an engine as drive sources includes an electric oil pump, a mechanical oil pump driven by power of the engine, and a hydraulic circuit. The hydraulic circuit includes first oil passages for supplying oil to the first MG, a second oil passage for supplying oil to the second MG, a switch-over valve capable of switching over states of communication of the first oil passage, and a switch control valve that outputs pilot hydraulic pressure to the switch-over valve. States of the switch-over valve are switched over in accordance with hydraulic pressure from the switch control valve and hydraulic pressure from the mechanical pump.Type: ApplicationFiled: December 24, 2013Publication date: June 26, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masafumi YAMAMOTO, Atsushi TABATA, Koichi OKUDA, Keita IMAI, Keisuke OMURO
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Publication number: 20140180441Abstract: Provided is a control device of a vehicle, the vehicle having an electric motor and an engine. The control device includes an operating device and a controller. The operating device is configured to be selected a running capability of the vehicle. The controller configured to increase a running capability to be achieved using the electric motor alone, in a case where the vehicle travels using the electric motor alone according to the selected running capability, as compared with a case where the vehicle travels using the electric motor alone and the running capability is not selected.Type: ApplicationFiled: December 18, 2013Publication date: June 26, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasuhiro HIASA, Atsushi TABATA, Tooru MATSUBARA, Takeshi KITAHATA, Tatsuya IMAMURA, Kenta KUMAZAKI, Kouichi OKUDA, Masafumi YAMAMOTO, Keita IMAI, Keisuke OMURO
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Publication number: 20140152182Abstract: A lighting device (10) includes a voltage converter (2) for generating a predetermined DC voltage, a detector (4) for obtaining a detection voltage corresponding to a predetermined DC voltage applied across a light source (20), a controller (3) for controlling the voltage converter (2) so that a current flowing through the light source (20) is constant, and a determination unit (5) for determining whether the detection voltage is a preset first reference voltage or higher. The first reference voltage is set higher by a specified voltage than the detection voltage, and is set to vary more slowly than the detection voltage. The controller (3) stops an operation of the voltage converter (2) when the detection voltage is determined to be the first reference voltage or higher through the determination unit (5).Type: ApplicationFiled: December 2, 2013Publication date: June 5, 2014Applicant: Panasonic CorporationInventors: Masafumi YAMAMOTO, Satoru NAGATA, Masato HIMEDA, Hisaya TAKIKITA, Koki MATSUI
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Patent number: 8701835Abstract: This lubricating device 1 is equipped with an oil pan 2 that stores therein lubricating oil, a micro bubble generator 4 that mixes the lubricating oil with air to produce micro bubbles and supplies the lubricating oil in the oil pan 2 with the micro bubbles, and an oil pump 3 that pressurizes the lubricating oil in the oil pan 2 to supply the micro bubble generator 4 therewith. Further, in this lubricating device 1, the micro bubble generator 4 has an air inlet portion 431 disposed inside the oil pan 2 at a predetermined position with respect to an oil surface height (oil level) of the lubricating oil in the oil pan 2.Type: GrantFiled: March 5, 2010Date of Patent: April 22, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Akira Murakami, Shuji Moriyama, Daisuke Tomomatsu, Daisuke Tokozakura, Masafumi Yamamoto, Keisuke Ichige, Masanori Iritani, Hiroyuki Nishizawa, Hideyuki Suzuki, Yasusi Hirano
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Patent number: 8669718Abstract: An LED lighting device includes: a power source unit for supplying the DC output voltage to a light-emitting diode; a control unit for adjusting the DC output voltage; and a control power source unit for supplying a control power to the control unit. The control power source unit generates the control power with the DC output voltage and has: a current-limiting resistor for limiting an electric current that flows from the power source unit to the control unit; a constant voltage unit for converting a voltage to be applied to the control unit through the current-limiting resistor unit to a constant voltage; and a switching unit for switching a resistance value of the current-limiting resistor unit among a plurality of resistance values.Type: GrantFiled: July 3, 2012Date of Patent: March 11, 2014Assignee: Panasonic CorporationInventors: Masafumi Yamamoto, Katunobu Hamamoto, Hiroyuki Asano, Hisaya Takikita, Hiroyuki Nakagawa, Yuji Yoshimoto
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Patent number: 8648544Abstract: An illumination lighting apparatus is connected to, as an external apparatus, any of a human body sensing sensor configured to detect presence/absence of a person, an illuminance sensor configured to detect space illuminance, and a dimmer which arbitrarily adjusts the space illuminance, and is configured to produce an output control signal for controlling an optical output of a light source based on a signal output from the external apparatus. The illumination lighting apparatus includes: an external apparatus determining unit configured to determine which kind of the external apparatus is connected based on the signal output from the external apparatus; and a signal processing unit configured to produce the output control signal based on the signal output from the external apparatus.Type: GrantFiled: June 15, 2009Date of Patent: February 11, 2014Assignee: Panasonic CorporationInventors: Tomohiro Sasakawa, Naoki Onishi, Masafumi Yamamoto, Keisuke Ueda, Katsunobu Hamamoto, Kei Mitsuyasu
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Publication number: 20140038755Abstract: A control system for a belt-type continuously variable transmission capable of preventing deterioration in fuel economy. A friction coefficient ?2 in a radially outer region of the tapered face of the driven pulley 7 is smaller than a friction coefficient ?1 in a radially inner region, and the control system comprises a speed change region setting means that increases frequency of carrying out a speed change operation within the radially inner region in case the energy saving mode is selected.Type: ApplicationFiled: April 20, 2011Publication date: February 6, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akira Ijichi, Toshinari Sano, Masafumi Yamamoto, Tatsuya Saito
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Publication number: 20140028196Abstract: A control unit controls an operation of an electric power conversion unit so that load current that flows through a light source load becomes a constant value, using electric power setting value that is used to determine a size of electric power that is supplied to the light source load and a current detection value that is detected by a current detection resistor (current detection unit), and a load electric power calculation unit obtains load electric power of the light source load using the electric power setting value and a voltage detection value that is detected by a voltage detection unit, and an input electric power estimation unit corrects a circuit loss for the obtained load electric power and estimates input electric power.Type: ApplicationFiled: July 17, 2013Publication date: January 30, 2014Inventors: Hisaya TAKIKITA, Masafumi YAMAMOTO, Katsunobu HAMAMOTO
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Publication number: 20140011616Abstract: A belt-driven continuously variable transmission adapted to reduce a frictional resistance between the movable sheave and the rotary shaft. The pulley includes the fixed sheave rotated integrally with the rotary shaft, and the movable sheave engaged with the rotary shaft in a manner to slide axially and to be rotated integrally with the rotary shaft. The driving belt is applied to the belt groove formed between the movable sheave and the fixed shave to transmit torque. The transmission is provided with the a passage for delivering fluid to the engagement mechanism engaging the rotary shaft with the movable sheave while allowing relative axial movement therebetween.Type: ApplicationFiled: March 25, 2011Publication date: January 9, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akira Ijichi, Toshinari Sano, Masafumi Yamamoto, Tatsuya Saito
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Publication number: 20140009077Abstract: An LED lighting device includes: a resistor R1 configured to output a detection value of an inductor current I1 flowing through an inductor L1 during an ON period of a switching element Q1; a threshold generation section 42 configured to generate a threshold value Vs of the inductor current I1 corresponding to a dimming level; and a switching control section 44 configured to control the switching element Q1 to turn on and off. The switching control section 44 is configured to determine an OFF timing of the switching element Q1 based on comparison between the detection value and the threshold value Vs of the inductor current I1. The LED lighting device increases a period of a switching cycle of the switching element Q1 with decrease of the dimming level.Type: ApplicationFiled: June 27, 2013Publication date: January 9, 2014Inventors: Yuji YOSHIMOTO, Katsunobu HAMAMOTO, Hiroyuki ASANO, Masafumi YAMAMOTO
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Publication number: 20130342217Abstract: A modeling device is disclosed that easily projects characteristic information obtained from an object onto a differently-shaped object, even if the object, from which the characteristic information is obtained, has a complex shape. A modeling device in one embodiment of the present invention includes a virtually electrifying section to calculate an electric potential at a spot in a heart at the time when a predetermined voltage is applied to the heart, and a projecting section to project a fiber orientation onto a heart model created on the basis of shape information that is input to the input section. The projecting section specifies a spot to be a target of projection on the basis of the electric potential obtained by the virtually electrifying section. Use of the electric potential in specifying the spot makes it possible to easily project the fiber orientation onto any heart having complex and various shapes.Type: ApplicationFiled: August 26, 2013Publication date: December 26, 2013Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: Toshiaki HISADA, Hiroshi KUROKAWA, Nobuhiko OSHIDA, Masafumi YAMAMOTO, Takumi WASHIO, Jun-Ichi OKADA, Hiroshi WATANABE, Seiryo SUGIURA
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Patent number: 8564206Abstract: An LED lighting device includes a step-up chopper which includes a first switching element and increases an output voltage applied from a DC power supply, a step-down chopper which includes a second switching element and decreases the output voltage from the step-up chopper to apply the decreased output voltage to a light source unit having light emitting diodes, a controller which controls operations of the first and the second switching element, a current limiter which includes a current limiting element and a switch; and a voltage detection unit. The controller stops an operation of the first switching element when the voltage detection unit detects the voltage applied to the light source unit exceeding a predetermined voltage value, and the switch allows a current to flow through the path passing through the current limiting element when the operation of the first switching element is stopped.Type: GrantFiled: December 15, 2011Date of Patent: October 22, 2013Assignee: Panasonic CorporationInventors: Katunobu Hamamoto, Masafumi Yamamoto, Keisuke Ueda, Hisaya Takikita
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Patent number: 8554491Abstract: A modeling device is disclosed that easily projects characteristic information obtained from an object onto a differently-shaped object, even if the object, from which the characteristic information is obtained, has a complex shape. A modeling device in one embodiment of the present invention includes a virtually electrifying section to calculate an electric potential at a spot in a heart at the time when a predetermined voltage is applied to the heart, and a projecting section to project a fiber orientation onto a heart model created on the basis of shape information that is input to the input section. The projecting section specifies a spot to be a target of projection on the basis of the electric potential obtained by the virtually electrifying section. Use of the electric potential in specifying the spot makes it possible to easily project the fiber orientation onto any heart having complex and various shapes.Type: GrantFiled: December 8, 2011Date of Patent: October 8, 2013Assignee: Japan Science and Technology AgencyInventors: Toshiaki Hisada, Hiroshi Kurokawa, Nobuhiko Oshida, Masafumi Yamamoto, Takumi Washio, Jun-ichi Okada, Hiroshi Watanabe, Seiryo Sugiura
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Patent number: 8474130Abstract: Provided are a tripod constant velocity joint, and a method and a device for assembling the joint. The opening of a through-hole formed in an inner member of the tripod constant velocity joint has formed therein a tapered, reduced diameter section having a diameter tapered from the opening toward the inside. A first annular groove is formed in the side wall of a driving power transmission shaft, and a clip serving as an engaging member is engaged with the first annular groove. A second annular groove is formed in the inner wall of the through-hole in the inner member. In inserting the driving power transmission shaft through the through-hole in the inner member, the tapered, reduced diameter section guides the shaft in such a manner that the clip is contracted toward the bottom surface of the first annular groove. The clip expands and contracts due to the elasticity thereof when the positions of the first annular groove and the second annular groove coincide with each other.Type: GrantFiled: February 22, 2010Date of Patent: July 2, 2013Assignee: Honda Motor Co., Ltd.Inventors: Yoshihiro Tokuda, Masafumi Yamamoto, Masanori Takahashi, Hideki Kobayashi, Kaoru Tanaka, Yuki Funaki, Tomohiko Yamamoto, Tetsuya Watanabe
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Publication number: 20130026949Abstract: An LED lighting device includes: a power source unit for supplying the DC output voltage to a light-emitting diode; a control unit for adjusting the DC output voltage; and a control power source unit for supplying a control power to the control unit. The control power source unit generates the control power with the DC output voltage and has: a current-limiting resistor for limiting an electric current that flows from the power source unit to the control unit; a constant voltage unit for converting a voltage to be applied to the control unit through the current-limiting resistor unit to a constant voltage; and a switching unit for switching a resistance value of the current-limiting resistor unit among a plurality of resistance values.Type: ApplicationFiled: July 3, 2012Publication date: January 31, 2013Applicant: PANASONIC CORPORATIONInventors: Masafumi YAMAMOTO, Katunobu HAMAMOTO, Hiroyuki ASANO, Hisaya TAKIKITA, Hiroyuki NAKAGAWA, Yuji YOSHIMOTO
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Publication number: 20120271459Abstract: In a positioning apparatus for an actuator, a sliding mode controller for compensating for nonlinear characteristics of a wave gear device of the actuator generates a control input u to a controlled object, based on a position command ?1* and a state variable x for expressing the controlled object. The controlled object is defined in the following formula. {dot over (x)}=Ax+Bu+E?l* y=Cx The switching surfaces of the sliding mode control system are defined by a variable S expressed in the following formula. S=BTP The control input u is the sum of the linear-state feedback control term ul and the nonlinear control input unl u = u l + u nl = - ( SB ) - 1 ? ( SAx + SE ? ? ? l * ) - k ? ( SB ) - 1 ? ? ? ? ? ? = Sx , where ? is the switching function, and k is the switching gain.Type: ApplicationFiled: April 17, 2012Publication date: October 25, 2012Applicants: National University Corporation Nagoya Institute of Technology, Harmonic Drive Systems Inc.Inventors: Yoshifumi Okitsu, Masafumi Yamamoto, Yuki Kato, Makoto Iwasaki
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Patent number: 8253351Abstract: A control means has an adjustment function in a microprocessor to adjust variations in an output to a discharge lamp due to variations in components by correcting a duty ratio of a PWM signal for varying an operating frequency of an inverter circuit so that a detected value of a second detection circuit falls within a target range. The microprocessor switches paths to transmit the PWM signal between a path passing through a feedback circuit and a path passing through a voltage follower circuit by switches a switch circuit to supply the signal through the path passing through the voltage follower circuit in adjusting output variations in the preheating mode and the starting mode.Type: GrantFiled: June 25, 2009Date of Patent: August 28, 2012Assignee: Panasonic CorporationInventors: Masafumi Yamamoto, Tetsuya Hamana, Hiroyuki Asano
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Patent number: 8245995Abstract: A wall-mounted device (1) which ensures easy confirmation of the mounting of a to-be-mounted-on-wall object on a wall surface or the like, and can prevent the to-be-mounted-on-wall object from falling off, and a timepiece having the device are provided. First, an attachment fitting (30) is fixed to the wall surface or the like by screws. Then, a hook part (30a) of the attachment fitting (30) is hooked on a hanging part (13) of the wall-mounted device (1) while deforming an elastic plate member (10) inward. When deformation of the elastic plate member (10) is released, vibration occurs together with generation of a light impact sound at the time the elastic plate member returns from the deformed state to the original state. With a first bent part (10a) of the elastic plate member (10) being in abutment with the hook part (30a) of the attachment fitting (30), the to-be-mounted-on-wall object is mounted on the wall surface or the like.Type: GrantFiled: April 18, 2007Date of Patent: August 21, 2012Assignee: Seiko Clock Inc.Inventor: Masafumi Yamamoto
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Publication number: 20120187847Abstract: An LED lighting device includes a DC/DC power converter having output terminals coupled to respective lamp sockets. A controller receives signals from a current sensor and a voltage sensor, and controls the DC/DC power converter to increase/decrease an output voltage based on a sensed output current with respect to a target value. A sensed output voltage is compared to predetermined upper and lower limit values, and the DC/DC power converter is disabled when the output voltage exceeds the predetermined upper limit value or falls below the predetermined lower limit. The controller further measures an accumulated lighting time of the device, and after the accumulated lighting time has exceeded a predetermined switching time, decreases the upper limit value monotonously or in increments as the accumulated lighting time passes.Type: ApplicationFiled: December 20, 2011Publication date: July 26, 2012Inventors: Katsunobu Hamamoto, Masafumi Yamamoto, Keisuke Ueda, Hisaya Takikita