Patents by Inventor Katsunobu Hamamoto
Katsunobu Hamamoto 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: 20190301717Abstract: A light source is provided that includes an attachment member, a light source section, a power supply device, and a conductor. The attachment member includes a plate portion and a through hole. The light source section includes a first board, a light emitter, a first terminal, and a first hole. A power supply circuit of the power supply device includes a second board, a second hole, a holder, and a second terminal. The holder is arranged along one surface, facing away from the plate portion, of the second board. The second terminal is held by the holder. The first terminal, the first hole, the through hole, the second hole, and the second terminal overlap with each other in the thickness direction of the plate portion. The conductor is electrically connected to the first terminal and the second terminal through the first hole, the through hole, and the second hole.Type: ApplicationFiled: March 21, 2019Publication date: October 3, 2019Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Tadahiro KONO, Akihiro HIRANO, Katsunobu HAMAMOTO
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Patent number: 9615414Abstract: A power supply device includes a power supply input portion, a rectification portion, a smoothing portion, a power conversion portion, a power supply output portion, a signal input portion, a control portion, a circuit substrate, and a case. The circuit substrate is formed in an elongated rectangular plate-like shape. The power supply input portion is mounted on a first end portion of the circuit substrate in a longitudinal direction. The rectification portion, the smoothing portion, the power conversion portion, the control portion, and the power supply output portion are mounted on the circuit substrate in the stated order from the first end portion toward a second end portion in the longitudinal direction. The signal input portion is mounted at a position closer to the second end portion than the rectification portion in the circuit substrate.Type: GrantFiled: July 29, 2015Date of Patent: April 4, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Katsunobu Hamamoto, Yasunori Yamamura, Tetsushi Tamura
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Publication number: 20160065085Abstract: A power supply device includes a power supply input portion, a rectification portion, a smoothing portion, a power conversion portion, a power supply output portion, a signal input portion, a control portion, a circuit substrate, and a case. The circuit substrate is formed in an elongated rectangular plate-like shape. The power supply input portion is mounted on a first end portion of the circuit substrate in a longitudinal direction. The rectification portion, the smoothing portion, the power conversion portion, the control portion, and the power supply output portion are mounted on the circuit substrate in the stated order from the first end portion toward a second end portion in the longitudinal direction. The signal input portion is mounted at a position closer to the second end portion than the rectification portion in the circuit substrate.Type: ApplicationFiled: July 29, 2015Publication date: March 3, 2016Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Katsunobu HAMAMOTO, Yasunori YAMAMURA, Tetsushi TAMURA
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Patent number: 9167642Abstract: 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: GrantFiled: June 27, 2013Date of Patent: October 20, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yuji Yoshimoto, Katsunobu Hamamoto, Hiroyuki Asano, Masafumi Yamamoto
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Patent number: 9167661Abstract: A power supply device comprises: a DC power supply section that outputs a DC voltage; a voltage conversion section that supplies a DC power to a load by ON/OFF drive of a switching element; a resistor; a control section that performs the ON/OFF drive of the switching element; and an auxiliary winding. The control section comprises: a calculation section that calculates a drive period of the switching element; a count section compares a calculation result obtained in the calculation section with an upper limit value of the drive period; and a flip-flop. When the calculation result is shorter than the upper limit value, the flip-flop sets the drive period, using the calculation result. When the calculation result is longer than the upper limit value, the flip-flop sets the drive period, using the upper limit value.Type: GrantFiled: December 31, 2012Date of Patent: October 20, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Katsunobu Hamamoto, Masafumi Yamamoto, Hiroyuki Asano
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Patent number: 9167665Abstract: 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: GrantFiled: July 17, 2013Date of Patent: October 20, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Hisaya Takikita, Masafumi Yamamoto, Katsunobu Hamamoto
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Patent number: 9066407Abstract: A dedicated power source for LED lamps capable of reliably detecting attachment of an LED lamp is provided. A dedicated power source has a DC power source portion, and includes a lighting circuit which receives power supplied from the DC power source portion and light-controls an LED lamp including an LED element and a detection resistor connected in parallel to the LED element and an attachment detecting portion for detecting attachment of the LED lamp based on a voltage level changing in accordance with attachment/detachment of the detection resistor by attachment/detachment of the LED lamp.Type: GrantFiled: July 22, 2011Date of Patent: June 23, 2015Assignees: Toshiba Lighting & Technology Corporation, Panasonic Corporation, Panasonic Electric Works Co., Ltd.Inventors: Hiroshi Terasaka, Hiroshi Kubota, Masahiko Kamata, Naoko Iwai, Takeshi Saito, Hiroki Nakagawa, Katsunobu Hamamoto, Hiroyuki Sako
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Patent number: 8853949Abstract: 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: GrantFiled: December 20, 2011Date of Patent: October 7, 2014Assignee: Panasonic CorporationInventors: Katsunobu Hamamoto, Masafumi Yamamoto, Keisuke Ueda, Hisaya Takikita
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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: 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: 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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Patent number: 8575857Abstract: The LED lighting device includes a lighting circuit unit, a current detecting unit, a voltage detecting unit, and a control unit. The lighting circuit unit is adapted in use to be connected to a lamp socket to be connected to a LED lamp, and is configured to provide an output voltage in the form of a DC voltage to the lamp socket in a manner to turn on the LED lamp. The current detecting unit is configured to detect an output current which is caused by the output voltage and is supplied from said lighting circuit unit to said lamp socket. The voltage detecting unit is configured to detect the output voltage of said lighting circuit unit. The control unit configured to control the lighting circuit unit.Type: GrantFiled: June 14, 2011Date of Patent: November 5, 2013Assignee: Panasonic CorporationInventors: Hiroyuki Sako, Katsunobu Hamamoto, Takeshi Saito, Hiroki Nakagawa, Hiroshi Terasaka
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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
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Publication number: 20120019166Abstract: A dedicated power source for LED lamps capable of reliably detecting attachment of an LED lamp is provided. A dedicated power source has a DC power source portion, and includes a lighting circuit which receives power supplied from the DC power source portion and light-controls an LED lamp including an LED element and a detection resistor connected in parallel to the LED element and an attachment detecting portion for detecting attachment of the LED lamp based on a voltage level changing in accordance with attachment/detachment of the detection resistor by attachment/detachment of the LED lamp.Type: ApplicationFiled: July 22, 2011Publication date: January 26, 2012Applicants: TOSHIBA LIGHTING & TECHNOLOGY CORPORATION, PANASONIC ELECTRIC WORK CO., LTD, PANASONIC CORPORATIONInventors: Hiroshi Terasaka, Hiroshi Kubota, Masahiko Kamata, Naoko Iwai, Takeshi Saito, Hiroki Nakagawa, Katsunobu Hamamoto, Hiroyuki Sako
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Publication number: 20110316442Abstract: The LED lighting device includes a lighting circuit unit, a current detecting unit, a voltage detecting unit, and a control unit. The lighting circuit unit is adapted in use to be connected to a lamp socket to be connected to a LED lamp, and is configured to provide an output voltage in the form of a DC voltage to the lamp socket in a manner to turn on the LED lamp. The current detecting unit is configured to detect an output current which is caused by the output voltage and is supplied from said lighting circuit unit to said lamp socket. The voltage detecting unit is configured to detect the output voltage of said lighting circuit unit. The control unit configured to control the lighting circuit unit.Type: ApplicationFiled: June 14, 2011Publication date: December 29, 2011Inventors: Hiroyuki Sako, Katsunobu Hamamoto, Takeshi Saito, Hiroki Nakagawa, Hiroshi Terasaka
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Publication number: 20110095698Abstract: 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: ApplicationFiled: June 15, 2009Publication date: April 28, 2011Inventors: Tomohiro Sasakawa, Naoki Onishi, Masafumi Yamamoto, Keisuke Ueda, Katsunobu Hamamoto, Kei Mitsuyasu
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Patent number: 7436123Abstract: An inverter controller dives an inverter to operate at a switching frequency selectively from one of a preheating frequency (f1), a starting frequency (f2), and a lighting frequency (f3) which are different from each other, thereby giving a preheating mode, a starting mode, and a lighting mode. A reset means is provided to make the starting mode upon lowering of a voltage supplied to the inverter below a first threshold, while an inverter stop means is provided to stop the inverter upon detection of abnormality of a discharge lamp. A timer generates a signal determining the start of the preheating, starting, and/or lighting modes, and generates a reset signal disable signal for disabling the reset means, an inverter stop disable signal for disabling the inverter stop means. The inverter controller includes a frequency sweep means for varying the switching frequency gradually from the starting frequency to the lighting frequency.Type: GrantFiled: November 29, 2005Date of Patent: October 14, 2008Assignee: Matsushita Electric Works, Ltd.Inventors: Katsunobu Hamamoto, Kazuhiro Nishimoto, Masahiro Yamanaka, Toshiya Kanja
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Patent number: 7378804Abstract: The ballast of the present invention includes a DC power supply, an inverter circuit, a load circuit, and an integrated control circuit. The integrated control circuit controls the switching elements of the DC power supply and the inverter circuit. The integrated control circuit includes a first control unit, a second control unit, and a driver circuit. The first control unit generates a first control signal for control of the switching element of the DC power supply. The second control unit generates a second control signal for control of the switching elements of the inverter circuit. The driver circuit provides drive signals for driving each one of the switching elements of said DC power supply and the inverter circuit in accordance with the first control signal and the second control signal.Type: GrantFiled: December 26, 2002Date of Patent: May 27, 2008Assignee: Matsushita Electric Works, Ltd.Inventors: Kei Mitsuyasu, Katsumi Sato, Katsunobu Hamamoto, Masahiro Yamanaka, Yoshifumi Kuroki
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Publication number: 20070296355Abstract: An inverter controller dives an inverter to operate at a switching frequency selectively from one of a preheating frequency (f1), a starting frequency (f2), and a lighting frequency (f3) which are different from each other, thereby giving a preheating mode, a starting mode, and a lighting mode. A reset means is provided to make the starting mode upon lowering of a voltage supplied to the inverter below a first threshold, while an inverter stop means is provided to stop the inverter upon detection of abnormality of a discharge lamp. A timer generates a signal determining the start of the preheating, starting, and/or lighting modes, and generates a reset signal disable signal for disabling the reset means, an inverter stop disable signal for disabling the inverter stop means. The inverter controller includes a frequency sweep means for varying the switching frequency gradually from the starting frequency to the lighting frequency.Type: ApplicationFiled: November 29, 2005Publication date: December 27, 2007Applicant: MATSUSHITA ELECTRIC WORKS, LTD.Inventors: Katsunobu Hamamoto, Kazuhiro Nishimoto, Masahiro Yamanaka, Toshiya Kanja
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Publication number: 20060158131Abstract: The ballast of the present invention includes a DC power supply, an inverter circuit, a load circuit, and an integrated control circuit. The integrated control circuit controls the switching elements of the DC power supply and the inverter circuit. The integrated control circuit includes a first control unit, a second control unit, and a driver circuit. The first control unit generates a first control signal for control of the switching element of the DC power supply. The second control unit generates a second control signal for control of the switching elements of the inverter circuit. The driver circuit provides drive signals for driving each one of the switching elements of said DC power supply and the inverter circuit in accordance with the first control signal and the second control signal.Type: ApplicationFiled: December 26, 2002Publication date: July 20, 2006Inventors: Kei Mitsuyasu, Katsumi Sato, Katsunobu Hamamoto, Masahiro Yamanaka, Yoshifumi Kuroki