Patents by Inventor Hirokazu Otake
Hirokazu Otake 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: 20130187563Abstract: According to one embodiment, a control section receives supply of control power from a control power supply section through a capacitive element and divides, a period of each half cycle of an alternating-current voltage into a first section, a second section, and a third section. In the first section, the control section subjects a switch section to conduction control to supply electric power to a load and stops a converting action of the control power supply section. In the second section, the control section subjects the switch section to non-conduction control to interrupt the power supply to the load and stops the converting action of the control power supply section. In the third section, the control section subjects the switch section to the non-conduction control to interrupt the power supply to the load and causes the converting action of the control power supply to operate.Type: ApplicationFiled: September 13, 2012Publication date: July 25, 2013Applicant: Toshiba Lighting & Technology CorporationInventors: Toshihiko SASAI, Hirokazu Otake, Katsuyuki Kobayashi, Masayuki Tanaka
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Patent number: 8492992Abstract: The present invention provides an LED lighting device including: a rectifying circuit having AC input ends connected to an AC source; a converter which has input ends connected to DC output ends of the rectifying circuit and output ends, to which an output capacitor is connected in parallel, connected to an LED, and lights the LED; a control unit for changing continued DC output current of the converter in accordance with a dimming degree; and a bypass circuit which is connected to the output ends of the converter in parallel with the output capacitor and makes bypass current flow, the bypass current being larger than lighting current, which flows through the LED, at least in the vicinity of a dimming lower limit.Type: GrantFiled: September 17, 2010Date of Patent: July 23, 2013Assignee: Toshiba Lighting & Technology CorporationInventors: Hirokazu Otake, Kenichi Asami
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Publication number: 20130170260Abstract: A power factor control circuit of an embodiment includes an inductor, a switching element, a constant current element, a feedback coil, and a control circuit. The switching element is connected to one end of the inductor in series, performs a switching operation of repeating an on-state and an off-state when an input voltage is relatively high, continues the on-state when the input voltage is relatively low, and causes an input current to flow through the inductor. The constant current element is connected to the switching element in series and limits the current of the switching element. The feedback coil is magnetically coupled to the inductor, supplies a voltage to a control terminal of the switching element, and controls the switching element. The control circuit controls a constant current value of the constant current element depending on the input voltage.Type: ApplicationFiled: September 10, 2012Publication date: July 4, 2013Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATIONInventors: Noriyuki KITAMURA, Yuji Takahashi, Hirokazu Otake
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Publication number: 20130134879Abstract: According to one embodiment, a luminaire includes a housing, a cable run, and a noise filter circuit. A lighting-circuit-integrated lamp is arranged in the housing. The cable run is configured to supply an external power to the lighting-circuit-integrated lamp. The noise filter circuit is provided in the cable run and reduces a noise terminal voltage.Type: ApplicationFiled: August 27, 2012Publication date: May 30, 2013Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATIONInventors: Yumi Hanyuda, Takayoshi Moriyama, Hirokazu Otake
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Patent number: 8450943Abstract: To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules.Type: GrantFiled: April 12, 2012Date of Patent: May 28, 2013Assignee: Toshiba Lighting & Technology CorporationInventors: Hirokazu Otake, Toshiyuki Hiraoka, Keiichi Shimizu, Nobuo Shibano
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Publication number: 20130119878Abstract: A lighting power source according to an embodiment includes a rectification circuit, a smoothing capacitor, a waveform shaping circuit, and a DC-DC converter. The rectification circuit rectifies an AC voltage input thereto. The waveform shaping circuit is connected between the rectification circuit and the smoothing capacitor, performs a switching operation to repeat an ON state and an OFF state when the voltage output from the rectification circuit is relatively high, continues to be in the ON state to allow the current to flow to the rectification circuit when the voltage output from the rectification circuit is relatively low. The DC-DC converter converts a voltage charged in the smoothing capacitor.Type: ApplicationFiled: September 10, 2012Publication date: May 16, 2013Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATIONInventors: Noriyuki Kitamura, Hirokazu Otake, Yuji Takahashi
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Publication number: 20130119879Abstract: A lighting power source according to an embodiment includes a rectifying circuit, a smoothing capacitor, a reference voltage generating circuit, and a DC-DC converter. The rectifying circuit rectifies an AD voltage input thereto. The smoothing capacitor smoothes an output from the rectifying circuit. The reference voltage generating circuit generates a reference voltage on the basis of at least any one of an output voltage of the rectifying circuit and a voltage from the smoothing capacitor. The DC-DC converter includes an output element and a constant current element, and converts the voltage of the smoothing capacitor. The output element receives a supply of a voltage of the smoothing capacitor, oscillates by performing a switching operation which repeats an ON state and an OFF state when the reference voltage is relatively high, and continues the ON state when the reference voltage is relatively low.Type: ApplicationFiled: September 10, 2012Publication date: May 16, 2013Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATIONInventors: Noriyuki Kitamura, Yuji Takahashi, Hirokazu Otake
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Patent number: 8441208Abstract: To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules.Type: GrantFiled: September 16, 2011Date of Patent: May 14, 2013Assignee: Toshiba Lighting & Technology CorporationInventors: Hirokazu Otake, Toshiyuki Hiraoka, Keiichi Shimizu, Nobuo Shibano
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Patent number: 8441204Abstract: A power supply device according to one embodiment is configured to control a lighting of semiconductor light-emitting elements, wherein a dimming signal is canceled during a predetermined time period (T) from a timing immediately after power-ON, so as to light on light-emitting diodes to have a predetermined light amount, for example, a minimum light amount. After an elapse of the predetermined time period (T), cancellation of the dimming signal is released to light on the light-emitting diodes to have a light amount instructed by the dimming signal.Type: GrantFiled: September 1, 2010Date of Patent: May 14, 2013Assignees: Toshiba Lighting & Technology Corp., Kabushiki Kaisha ToshibaInventors: Hirokazu Otake, Takuro Hiramatsu, Mitsuhiko Nishiie
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Publication number: 20130113387Abstract: According to one embodiment, a power supply for lighting includes an output element. The output element is connected between a power supply and a lighting load, and configured to be capable of being switched to a switching operation repeating an ON state and an OFF state and an ON continuation operation continuing the ON state.Type: ApplicationFiled: September 10, 2012Publication date: May 9, 2013Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATIONInventors: Noriyuki Kitamura, Hirokazu Otake, Yuji Takahashi, Toshio Tsuji
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Patent number: 8434908Abstract: A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated.Type: GrantFiled: August 29, 2012Date of Patent: May 7, 2013Assignee: Toshiba Lighting & Technology CorporationInventors: Satoshi Watanabe, Keiichi Shimizu, Takeshi Osada, Keiichi Shimizu, Toshiya Tanaka, Shigeru Osawa, Takeshi Hisayasu, Hirokazu Otake, Hitoshi Kawano, Makoto Sakai
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Patent number: 8430535Abstract: There is provided a lighting fixture capable of efficiently radiating heat of a lamp device attached to a socket device. By attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated.Type: GrantFiled: September 15, 2011Date of Patent: April 30, 2013Assignee: Toshiba Lighting & Technology CorporationInventors: Satoshi Watanabe, Keiichi Shimizu, Takeshi Osada, Keiichi Shimizu, Toshiya Tanaka, Shigeru Osawa, Takeshi Hisayasu, Hirokazu Otake, Hitoshi Kawano, Makoto Sakai
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Patent number: 8388189Abstract: A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated.Type: GrantFiled: August 29, 2012Date of Patent: March 5, 2013Assignee: Toshiba Lighting & Technology CorporationInventors: Satoshi Watanabe, Keiichi Shimizu, Takeshi Osada, Keiichi Shimizu, Toshiya Tanaka, Shigeru Osawa, Takeshi Hisayasu, Hirokazu Otake, Hitoshi Kawano, Makoto Sakai
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Patent number: 8354804Abstract: In a power supply device according to one embodiment, a reference signal (Vref1), which changes from a value corresponding to a maximum current in a full lighting state to that corresponding to a minimum current in case of a deepest dimming depth, and a reference signal (Vref2), which changes from a value corresponding to a load voltage at the time of a maximum current in a full lighting state to that corresponding to a minimum current in case of the deepest dimming depth, are prepared in accordance with dimming depths of a dimming signal. In a shallow dimming depth region close to a full lighting state, the reference signal (Vref1) is selected to apply constant-current control to light-emitting diodes in a current control mode. In a deep dimming depth region, the reference signal (Vref2) is selected to apply constant-voltage control to the diodes in a voltage control mode.Type: GrantFiled: September 1, 2010Date of Patent: January 15, 2013Assignees: Toshiba Lighting & Technology Corporation, Kabushiki Kaisha ToshibaInventors: Hirokazu Otake, Mitsuhiko Nishiie, Takuro Hiramatsu, Keiichi Shimizu
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Publication number: 20120326620Abstract: To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules.Type: ApplicationFiled: August 31, 2012Publication date: December 27, 2012Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATIONInventors: Hirokazu Otake, Toshiyuki Hiraoka, Keiichi Shimizu, Nobuo Shibano
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Publication number: 20120320609Abstract: A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated.Type: ApplicationFiled: August 29, 2012Publication date: December 20, 2012Applicant: Toshiba Lighting & Technology CorporationInventors: Satoshi WATANABE, Keiichi SHIMIZU, Takeshi OSADA, Keiichi SHIMIZU, Toshiya TANAKA, Shigeru OSAWA, Takeshi HISAYASU, Hirokazu OTAKE, Hitoshi KAWANO, Makoto SAKAI
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Publication number: 20120320565Abstract: A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated.Type: ApplicationFiled: August 29, 2012Publication date: December 20, 2012Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATIONInventors: Satoshi Watanabe, Keiichi Shimizu, Takeshi Osada, Keiichi Shimizu, Toshiya Tanaka, Shigeru Osawa, Takeshi Hisayasu, Hirokazu Otake, Hitoshi Kawano, Makoto Sakai
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Publication number: 20120320611Abstract: A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated.Type: ApplicationFiled: August 29, 2012Publication date: December 20, 2012Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATIONInventors: Satoshi Watanabe, Keiichi Shimizu, Takeshi Osada, Keiichi Shimizu, Toshiya Tanaka, Shigeru Osawa, Takeshi Hisayasu, Hirokazu Otake, Hitoshi Kawano, Makoto Sakai
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Publication number: 20120319613Abstract: To a constant-current power supply whose output current can be variably set, light emitting modules can be connected in parallel. A control unit recognizes connection information outputted from an information output unit provided in each of the light emitting modules and varies the output current of the constant-current power supply. Drive can be controlled in response to a state of the connected light emitting modules such as the connecting number of light emitting modules.Type: ApplicationFiled: August 31, 2012Publication date: December 20, 2012Applicant: Toshiba Lighting & Technology CorporationInventors: Hirokazu Otake, Toshiyuki Hiraoka, Keiichi Shimizu, Nobuo Shibano
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Publication number: 20120320610Abstract: A lighting fixture capable of efficiently radiating heat of a lamp device may be configured to be attached to a socket device. In some examples, by attaching the lamp device to the socket device, a cap portion of the lamp device is brought into contact with a fixture body, and pressed against and brought into close contact with the fixture body by an elastic body. Heat generated by lighting of LEDs of the lamp device is conducted from the cap portion to the fixture body and efficiently radiated.Type: ApplicationFiled: August 29, 2012Publication date: December 20, 2012Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATIONInventors: Satoshi Watanabe, Keiichi Shimizu, Takeshi Osada, Keiichi Shimizu, Toshiya Tanaka, Shigeru Osawa, Takeshi Hisayasu, Hirokazu Otake, Hitoshi Kawano, Makoto Sakai