Patents by Inventor Kazuto Kuroda
Kazuto Kuroda 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: 8593926Abstract: An information storage device includes an information recording medium, at least a single light source that emits laser light, an illuminating unit that illuminates substantially the same position of the information recording medium with two light rays generated from the laser light, in different directions, a light detecting unit that detects reflection light of the two light rays reflected from the information recording medium and outputs a detection signal, an operation unit that calculates position error information of the information recording medium based on the detection signal; and, a driving device that changes the position of the information recording medium based on the position error information.Type: GrantFiled: January 19, 2012Date of Patent: November 26, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Kazuo Watabe, Kazuto Kuroda, Takashi Usui, Hideaki Okano
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Patent number: 8462005Abstract: According to one embodiment, a communication circuit includes a direct-current converter circuit configured to generate a second power supply potential different from a second reference potential by a predetermined potential, from a first power supply potential, a first receiving circuit configured to receive a binary communication signal, whose one level is at a first reference potential, through a first signal input terminal, by a differential transmission method, a first level shift circuit configured to convert the communication signal received by the first receiving circuit into a binary communication signal, whose one level is at the second reference potential, and the other level is at the second power supply potential, and a first transmission circuit configured to output the binary communication signal converted by the first level shift circuit, through a first signal output terminal, by a differential transmission method.Type: GrantFiled: September 24, 2010Date of Patent: June 11, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Kazuto Kuroda, Shinichiro Kosugi, Nobuo Shibuya, Yasuhiro Miyamoto
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Publication number: 20130033232Abstract: According to one embodiment, an AC blocking filter is provided between charging/discharging terminals of a storage battery and an inverter that converts a DC output of the storage battery to an AC output. Further, a DC blocking filter is connected to the charging/discharging terminals. An alternating current generation device supplies a warm-up alternating current to the storage battery via the DC blocking filter.Type: ApplicationFiled: June 15, 2012Publication date: February 7, 2013Inventors: Shinichiro Kosugi, Kazuto Kuroda
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Patent number: 8368353Abstract: According to one embodiment, the power supply management portion includes a timer configured to output an ON signal every time set by the control circuit, an OR circuit configured to receive supply of an output signal from the timer, an external signal supplied from outside, and a switch control signal output from the control circuit, and a switch circuit configured to switch output of the power source voltage from an external power source according to an output signal from the OR circuit, and the control circuit turns on a switch control signal after confirming which of the output signal from the timer or the external signal has turned on the switch circuit and turns off the switch control signal when both of the output signal from the timer and the signal supplied from outside are turned off.Type: GrantFiled: August 31, 2010Date of Patent: February 5, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Takashi Akiba, Mami Mizutani, Fumiyuki Yamane, Yuki Kuwano, Ryuichi Morikawa, Shuji Ono, Nobuo Shibuya, Kazuto Kuroda, Shinichiro Kosugi, Yasuhiro Miyamoto
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Publication number: 20120221266Abstract: A test system to test a battery pack includes a power supply, a high-frequency-voltage application unit, a splitter, a first coupling capacitor, a second coupling capacitor, a ground, and a data logger. The power supply supplies power to a battery management unit of the battery pack. The splitter includes an input terminal, and first and second output terminals. The high-frequency-voltage application unit outputs a high-frequency voltage to the input terminal of the splitter. The first coupling capacitor is provided between the first output terminal and a positive-electrode terminal of the battery pack. The second coupling capacitor is provided between the second output terminal and a negative-electrode terminal of the battery pack. An earth terminal of the high-frequency-voltage application unit and one of power-supply input terminal of the battery pack are connected to the ground. The data logger records data outputted from a data-output terminal of the battery management unit.Type: ApplicationFiled: February 27, 2012Publication date: August 30, 2012Inventors: Kazuto Kuroda, Shinichiro Kosugi, Nobuo Shibuya
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Publication number: 20120140606Abstract: An information storage device includes an information recording medium, at least a single light source that emits laser light, an illuminating unit that illuminates substantially the same position of the information recording medium with two light rays generated from the laser light, in different directions, a light detecting unit that detects reflection light of the two light rays reflected from the information recording medium and outputs a detection signal, an operation unit that calculates position error information of the information recording medium based on the detection signal; and, a driving device that changes the position of the information recording medium based on the position error information.Type: ApplicationFiled: January 19, 2012Publication date: June 7, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kazuo Watabe, Kazuto Kuroda, Takashi Usui, Hideaki Okano
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Publication number: 20120008476Abstract: According to one embodiment, an information reproduction apparatus includes an information acquisition unit, an error detection unit, and a control unit. The information acquisition unit is configured to irradiate a reference beam, convert the reference beam into a luminance signal, and output the luminance signal when reproducing an information recording Medium. The error detection unit is configured to detect at least one selected from a first error and a second error by extracting a feature extraction quantity from the luminance signal. The first error is of an irradiation angle of the reference beam. The second error is of at least one selected from a temperature and a wavelength of the reference beam. The control unit is configured to control at least one selected from the irradiation angle and the at least one selected from the reproduction temperature and the wavelength of the reference beam using the second error.Type: ApplicationFiled: September 21, 2011Publication date: January 12, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kazuto Kuroda, Kazuo Watabe, Hideaki Okano, Akihito Ogawa, Takashi Usui
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Publication number: 20120007556Abstract: An apparatus is disclosed that includes a resistance measuring unit operable to determine a solution resistance Rsol and a charge transfer resistance Rct of a battery; and at least one computer-readable non-transitory storage medium comprising code, that, when executed by at least one processor, is operable to provide an estimate of the present value of the battery by: comparing Rsol and Rct to historical deterioration transition information; estimating the number of remaining charge cycles before a discharge capacity lower limit is reached by the battery using the comparison; and estimating the number of remaining charge cycles before a discharge time lower limit is reached by the battery using the comparison. The estimate of the present value of the battery includes the smaller of the number of remaining charge cycles before a discharge capacity lower limit is reached or the number of remaining charge cycles before a discharge time lower limit is reached.Type: ApplicationFiled: December 21, 2010Publication date: January 12, 2012Inventors: Akihiro Matsui, Kazuto Kuroda, Yasuhiro Harada, Shinichiro Kosugi, Hisashi Oya, Mami Mizutani, Takashi Morimoto, Takeo Hayase, Yukitaka Monden, Norio Takami
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Patent number: 8077586Abstract: According to one embodiment, an optical recording head device includes a light source which outputs such a relaxation oscillation optical pulse that a full width at half maximum of a single pulse is 820 ps or less, a driving unit for driving the light source, an objective lens which converges emission light from the light source on a recording layer of a recording medium, and captures reflective light which is reflected by the recording layer of the recording medium, a distribution unit, placed between the light source and the objective lens, for distributing incident light, and a photodetection unit for receiving via the distribution unit the reflective light which is reflected by the recording layer of the recording medium, wherein a resonator length of the light source is 6560 ?m or less.Type: GrantFiled: October 23, 2008Date of Patent: December 13, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Kazuo Watabe, Takashi Usui, Keiichiro Yusu, Chosaku Noda, Kazuto Kuroda, Nobuaki Kaji, Masahiro Saito
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Patent number: 7949071Abstract: According to one embodiment, a first encoder encodes main information, a second encoder encodes sub-information, a first modulator modulates a carrier based on an output of the first encoder, a duplicating module duplicates an output of the second encoder to generate encoded sub-information units, and a second modulator amplitude-modulates an output of the first modulator based on the encoded sub-information units. The second modulator amplitude-modulates with ?/(?×(2N)1/2) being 0.4 or less, wherein a noise power of a transmission path or a storage medium is ?2, a number of the encoded sub-information units is N, signal levels after amplitude modulation, which correspond to bit 1 and bit 0 of the encoded sub-information units, are A and B, and a level difference A?B is ?.Type: GrantFiled: November 25, 2009Date of Patent: May 24, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Yuji Nagai, Chosaku Noda, Kazuo Watabe, Akihito Ogawa, Kazuto Kuroda, Nobuhisa Yoshida, Nobumasa Naito, Naoki Morishita, Naomasa Nakamura, Hideaki Ohsawa, Hiroharu Sato, Hisashi Yamada, Toshihiko Kaneshige
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Publication number: 20110076530Abstract: According to one embodiment, a device includes a power management module to which a power is supplied from an external power source, a power source supply circuit to which a power is supplied from the power management module via a first input terminal, a latch circuit configured to be operated by a power supplied from the power supply circuit or a power supplied via a second input terminal, a circuit configured to output a logic signal that sets a shutdown signal output from the latch circuit to a third input terminal, and a logic communication circuit to which a logic signal is supplied via the third input terminal and which supplies the logic signal to a forth terminal of the larch circuit. The shutdown signal output from the latch circuit is set to an predetermined level when the logic signal is set to a second level from a first level.Type: ApplicationFiled: September 28, 2010Publication date: March 31, 2011Inventors: Yasuhiro MIYAMOTO, Shinichiro Kosugi, Yuki Kuwano, Nobuo Shibuya, Kazuto Kuroda
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Publication number: 20110075712Abstract: According to one embodiment, a communication circuit includes a direct-current converter circuit configured to generate a second power supply potential different from a second reference potential by a predetermined potential, from a first power supply potential, a first receiving circuit configured to receive a binary communication signal, whose one level is at a first reference potential, through a first signal input terminal, by a differential transmission method, a first level shift circuit configured to convert the communication signal received by the first receiving circuit into a binary communication signal, whose one level is at the second reference potential, and the other level is at the second power supply potential, and a first transmission circuit configured to output the binary communication signal converted by the first level shift circuit, through a first signal output terminal, by a differential transmission method.Type: ApplicationFiled: September 24, 2010Publication date: March 31, 2011Inventors: Kazuto KURODA, Shinichiro Kosugi, Nobuo Shibuya, Yasuhiro Miyamoto
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Publication number: 20110050169Abstract: According to one embodiment, the power supply management portion includes a timer configured to output an ON signal every time set by the control circuit, an OR circuit configured to receive supply of an output signal from the timer, an external signal supplied from outside, and a switch control signal output from the control circuit, and a switch circuit configured to switch output of the power source voltage from an external power source according to an output signal from the OR circuit, and the control circuit turns on a switch control signal after confirming which of the output signal from the timer or the external signal has turned on the switch circuit and turns off the switch control signal when both of the output signal from the timer and the signal supplied from outside are turned off.Type: ApplicationFiled: August 31, 2010Publication date: March 3, 2011Inventors: Takashi AKIBA, Mami Mizutani, Fumiyuki Yamane, Yuki Kuwano, Ryuichi Morikawa, Shuji Ono, Nobuo Shibuya, Kazuto Kuroda, Shinichiro Kosugi, Yasuhiro Miyamoto
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Publication number: 20100135436Abstract: According to one embodiment, a first encoder encodes main information, a second encoder encodes sub-information, a first modulator modulates a carrier based on an output of the first encoder, a duplicating module duplicates an output of the second encoder to generate encoded sub-information units, and a second modulator amplitude-modulates an output of the first modulator based on the encoded sub-information units. The second modulator amplitude-modulates with ?/(?×(2N)1/2) being 0.4 or less, wherein a noise power of a transmission path or a storage medium is ?2, a number of the encoded sub-information units is N, signal levels after amplitude modulation, which correspond to bit 1 and bit 0 of the encoded sub-information units, are A and B, and a level difference A?B is ?.Type: ApplicationFiled: November 25, 2009Publication date: June 3, 2010Inventors: Yuji NAGAI, Chosaku Noda, Kazuo Watabe, Akihito Ogawa, Kazuto Kuroda, Nobuhisa Yoshida, Nobumasa Naito, Naoki Morishita, Naomasa Nakamura, Hideaki Ohsawa, Hiroharu Sato, Hisashi Yamada, Toshihiko Kaneshige
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Publication number: 20100020181Abstract: In an information processing apparatus according to the present invention, a control unit obtains identification information identifying an information device connected to the information processing apparatus, determines compatibility based upon the identification information and a prestored list table of compatible information devices, and writes information that is recorded in advance to the information device to a disc when it is determined that the information device is compatible with the information processing apparatus.Type: ApplicationFiled: December 21, 2007Publication date: January 28, 2010Applicant: Kabushiki Kaisha ToshibaInventor: Kazuto Kuroda
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Publication number: 20090196142Abstract: According to one embodiment, in an information recording medium for which a phase change material is used and in which information is recorded on, reproduced from, and erased from a recording layer by light irradiation, a recrystallization width WR at a periphery of an amorphous recording mark formed on the recording layer by light irradiation, and a recording mark width WA and a track pitch TP satisfy 1.0<WR/WA<1.1 and 2/3<WA/TP<4/3.Type: ApplicationFiled: January 29, 2009Publication date: August 6, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Keiichiro YUSU, Masahiro SAITO, Kazuto KURODA, Takashi USUI, Kazuo WATABE, Chosaku NODA, Nobuaki KAJI, Tsukasa NAKAI
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Publication number: 20090196148Abstract: According to one embodiment, the invention provides a master recording apparatus and method which can form a pit having a symmetrical pit shape with excellent reproducibility. An embodiment of the invention is a master recording apparatus where a resist film on a master for an optical disk is irradiated with irradiation light from a semiconductor laser to record information on the resist film, where the resist film is formed as an inorganic resist film, and means for outputting the irradiation light from the semiconductor laser as a short pulse laser with a pulse width between 200 ps and 1 ns is provided.Type: ApplicationFiled: January 29, 2009Publication date: August 6, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Keiichiro YUSU, Masahiro SAITO, Kazuto KURODA, Takashi USUI, Kazuo WATABE, Chosaku NODA, Nobuaki KAJI, Masaaki MATSUMARU, Ryosuke YAMAMOTO
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Publication number: 20090196138Abstract: According to one embodiment, in one embodiment of the invention, a laser drive circuit is provided with a first current source, a second drive current source, and a third current source. The control section selectively obtains a plurality of laser light use mode of controlling the from first to third current sources to use pulse laser light accompanying relaxation oscillation, and a complex laser light use mode of using laser light where laser pulses are combined, whose starting end has an abrupt impulse change portion caused by relaxation oscillation and whose intermediate section is a flat portion with a fixed intensity.Type: ApplicationFiled: January 9, 2009Publication date: August 6, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Nobuaki Kaji, Kazuo Watabe, Takashi Usui, Keiichiro Yusu, Chosaku Noda, Kazuto Kuroda, Masahiro Saito
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Publication number: 20090141760Abstract: According to one embodiment, a drive control apparatus of a semiconductor laser includes a driving circuit which drives the semiconductor laser by applying pulses transiting from bias current to peak current to the semiconductor laser as laser driving current that causes relaxation oscillation of emission light intensity of the semiconductor laser, and a control circuit which controls the bias current such that the bias current has a predetermined ratio limiting fluctuation of a leading peak value of the relaxation oscillation occurring for each application of pulses relative to threshold current of the semiconductor laser. The control circuit changes the bias current to maintain the predetermined ratio relative to fluctuation of the threshold current.Type: ApplicationFiled: October 29, 2008Publication date: June 4, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masahiro Saito, Takashi Usui, Kazuo Watabe, Keiichiro Yusu, Chosaku Noda, Nobuaki Kaji, Kazuto Kuroda
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Publication number: 20090109809Abstract: According to one embodiment, a laser drive circuit includes a photodetector which receives part of laser light emitted from a laser element to a recording medium independently of reflection laser light reflected by the recording medium, and outputs an output corresponding to the strength thereof, an integration circuit which integrates the output from the photodetector for a predetermined time, and a setting circuit which sets the intensity of a laser drive current supplied to the laser element on the basis of the output from the integration circuit.Type: ApplicationFiled: October 24, 2008Publication date: April 30, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kazuto Kuroda, Kazuo Watabe, Keiichiro Yusu, Chosaku Noda, Nobuaki Kaji, Takashi Usui, Masahiro Saito