Patents by Inventor Yukihiro Yamasaki
Yukihiro Yamasaki 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: 11923550Abstract: The preset disclosure provides a catalyst layer that has a small contact resistance with a gas diffusion layer and excellent gas diffusion properties. The catalyst layer for a fuel cell has a uniform thickness and includes fibrous conductive members and catalyst particles. The fibrous conductive members are inclined relative to a surface direction of the catalyst layer, and a lengthwise direction of the fibrous conductive members, on average, matches a first direction.Type: GrantFiled: December 26, 2018Date of Patent: March 5, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takeshi Minamiura, Hitoshi Ishimoto, Shinichiro Imura, Kazuya Yamasaki, Yukihiro Shimasaki
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Patent number: 11786948Abstract: A roll state monitor device includes: rolling force detector configured to detect rolling force of a monitored roll selected from an upper roll set and a lower roll set; force variation value extractor configured to extract a rolling force variation value based on the rolling force for each rotation position of the monitored roll; and identification part configured to identify a roll eccentricity amount of the monitored roll by acquiring a plurality of accumulated values by accumulating separately for each rotation position of the monitored roll a value which is one of the rolling force variation value and a roll gap equivalent value calculated based on the rolling force variation value, and by dividing each of the plurality of accumulated values by a correction coefficient corresponding to a roll rotation amount.Type: GrantFiled: August 28, 2019Date of Patent: October 17, 2023Assignee: TOSHIBA MITSUBISHI—ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Hiroyuki Imanari, Yukihiro Yamasaki
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Patent number: 11052441Abstract: There is provided a meandering control device for a rolling line capable of setting temperature of a material to be rolled so as to suppress meandering of the material to be rolled. The meandering control includes a tail end roll force calculation unit that calculates a predictive value of roll force when entry side tension is not applied, an allowable meandering amount roll force calculation unit that calculates a reference value of the roll force applied to the material to be rolled when a meandering amount of the material to be rolled is an allowable amount, and a temperature rise amount calculation unit that calculates a temperature rise amount of the material to be rolled, based on a difference between the predictive value of the roll force and the reference value of the roll force.Type: GrantFiled: February 2, 2015Date of Patent: July 6, 2021Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yukihiro Yamasaki, Naohiro Kubo
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Publication number: 20210060630Abstract: A roll state monitor device includes: rolling force detector configured to detect rolling force of a monitored roll selected from an upper roll set and a lower roll set; force variation value extracting means configured to extract a rolling force variation value based on the rolling force for each rotation position of the monitored roll; and identification part configured to identify a roll eccentricity amount of the monitored roll by acquiring a plurality of accumulated values by accumulating separately for each rotation position of the monitored roll a value which is one of the rolling force variation value and a roll gap equivalent value calculated based on the rolling force variation value, and by dividing each of the plurality of accumulated values by a correction coefficient corresponding to a roll rotation amount.Type: ApplicationFiled: August 28, 2019Publication date: March 4, 2021Applicant: Toshiba Mitsubishi-Electric Industrial Systems CorporationInventors: Hiroyuki IMANARI, Yukihiro YAMASAKI
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Publication number: 20170326605Abstract: There is provided a meandering control device for a rolling line capable of setting temperature of a material to be rolled so as to suppress meandering of the material to be rolled. The meandering control includes a tail end roll force calculation unit that calculates a predictive value of roll force when entry side tension is not applied, an allowable meandering amount roll force calculation unit that calculates a reference value of the roll force applied to the material to be rolled when a meandering amount of the material to be rolled is an allowable amount, and a temperature rise amount calculation unit that calculates a temperature rise amount of the material to be rolled, based on a difference between the predictive value of the roll force and the reference value of the roll force.Type: ApplicationFiled: February 2, 2015Publication date: November 16, 2017Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yukihiro YAMASAKI, Naohiro KUBO
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Patent number: 9508378Abstract: An optical disk and an optical disk reproduction device for reproducing the same are provided. The optical disk including at least one layer comprises an information storage area for storing information on the optical disk and a data area for storing data, wherein the information storage area stores information on the amount of reflection and thickness of each of a plurality of layers, and transmission speed information on a plurality of areas which constitute the data area.Type: GrantFiled: November 7, 2013Date of Patent: November 29, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jae-hyun Kim, Joji Anzai, Shuichi Tasaka, Sang-yeal Park, Chang-hoon Son, Yukihiro Yamasaki, Jang-ho Jin, Byoung-ho Choi
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Publication number: 20150287431Abstract: An optical disk and an optical disk reproduction device for reproducing the same are provided. The optical disk including at least one layer comprises an information storage area for storing information on the optical disk and a data area for storing data, wherein the information storage area stores information on the amount of reflection and thickness of each of a plurality of layers, and transmission speed information on a plurality of areas which constitute the data area.Type: ApplicationFiled: November 7, 2013Publication date: October 8, 2015Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jae-hyun Kim, Joji Anzai, Shuichi Tasaka, Sang-yeal Park, Chang-hoon Son, Yukihiro Yamasaki, Jang-ho Jin, Byoung-ho Choi
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Patent number: 8358139Abstract: An optical reproducing apparatus connectable to optical pickups and a method of controlling an optical pickup thereof are provided. The optical reproducing apparatus measures resistance of an optical pickup on a port of a connection unit to which the optical pickup is connected, and determines the type of the optical pickup according to the measured resistance. Accordingly, optical reproducing apparatuses may be controlled according to the type of optical pickups, and manufactured using various optical pickups without checking the type of optical pickups, which allows convenient manufacturing of optical reproducing apparatuses.Type: GrantFiled: March 29, 2010Date of Patent: January 22, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Ji-seon Baek, Yukihiro Yamasaki
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Publication number: 20110090777Abstract: An optical reproducing apparatus connectable to optical pickups and a method of controlling an optical pickup thereof are provided. The optical reproducing apparatus measures resistance of an optical pickup on a port of a connection unit to which the optical pickup is connected, and determines the type of the optical pickup according to the measured resistance. Accordingly, optical reproducing apparatuses may be controlled according to the type of optical pickups, and manufactured using various optical pickups without checking the type of optical pickups, which allows convenient manufacturing of optical reproducing apparatuses.Type: ApplicationFiled: March 29, 2010Publication date: April 21, 2011Applicant: Samsung Electronics Co, Ltd.Inventors: Ji-seon Baek, Yukihiro Yamasaki
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Patent number: 7239586Abstract: An optical disk drive and recording power determination method determine the optimum power with consideration for the recording state of a base layer track when determining the optimum power by test recording before recording user data. After recording at a second recording power that is higher than a first recording power by a specific amount, recording is performed at a third recording power that is lower than the first recording power by a specific amount, and the first recording power is set to the recording power for data recording when a specified playback signal quality is achieved.Type: GrantFiled: July 27, 2001Date of Patent: July 3, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mamoru Shoji, Toshiya Akagi, Atsushi Nakamura, Ariaki Ito, Yukihiro Yamasaki, Yasuhiro Honda, Takashi Ishida, Shinichi Konishi, Yuji Hisakado
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Publication number: 20040022166Abstract: An object is to determine the optimum power with consideration for the recording state of a base layer track when determining the optimum power by test recording before recording user data. After recording at a second recording power higher by a specific amount than a first recording power, recording is done at a third recording power lower by a specific amount than the first recording power, and the first recording power is set to the recording power for data recording when a specified playback signal quality is achieved.Type: ApplicationFiled: July 15, 2003Publication date: February 5, 2004Inventors: Mamoru Shoji, Toshiya Akagi, Atsushi Nakamura, Ariaki Ito, Yukihiro Yamasaki, Yasuhiro Honda, Takashi Ishida, Shinichi Konishi, Yuji Hisakado
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Patent number: 6657929Abstract: The optical disk recording apparatus of this invention includes: a first detection section for detecting a ID address cycle based on a timing of detection of an ID section of an optical disk; a second detection section for detecting a wobble cycle based on a wobble clock; and a state determination section for determining a state of the wobble clock based on the ID address cycle and the wobble cycle.Type: GrantFiled: June 21, 1999Date of Patent: December 2, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Jun-ichi Minamino, Yukihiro Yamasaki
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Method and apparatus for determining optical recording power used for recording onto an optical disk
Patent number: 6614735Abstract: The invention provides an optical disc device and a method of determining an optimal laser power for data recording by trial recording before recording actual user data even when there are fingerprints in the test track area for the trial recording. The BER (Byte Error Rate) is detected in each recorded sector. If the BER is less than a particular threshold value, the sector is taken as OK (good). Otherwise the sector is taken as NG (no good). While the peak power level is gradually changed or decreased from the power level at which half or more of the plural reproduced sectors are OK, a boundary peak power at which half or more of the sectors become NG is found. Based on the found boundary power, an amount of the optimal peak power is determined.Type: GrantFiled: March 22, 2001Date of Patent: September 2, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mamoru Shoji, Ariaki Ito, Takashi Ishida, Yukihiro Yamasaki, Toshiya Akagi -
Patent number: 6434098Abstract: An optical disc drive usable with discs to which data is continuously recorded and discs having a sector format can quickly resume playback signal output after passing imperfection causing potential reading errors, and plays disc with few read errors. A detection signal generator detects DC level fluctuation in the playback signal read from the disc and generates a detection signal tracking the DC level fluctuation. A selector selects a detection signal or a null signal without valid polarity based on the detection signal generated by the detection signal generator and input to the selector. A clamping unit performs a clamping process to suppress DC level fluctuation in the playback signal based on the detection signal when the selection unit selects the detection signal, and does not perform the clamping process when the selection unit selects the null signal. A signal processor performs specific signal processes based on clamping unit output.Type: GrantFiled: April 25, 2001Date of Patent: August 13, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shinichi Konishi, Takeshi Nakajima, Harumitsu Miyashita, Toshihiko Takahashi, Toshiya Akagi, Yuji Hisakado, Yukihiro Yamasaki
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Publication number: 20010055251Abstract: An optical disc drive usable with discs to which data is continuously recorded and discs having a sector format can quickly resume playback signal output after passing imperfection causing potential reading errors, and plays disc with few read errors. A detection signal generator detects DC level fluctuation in the playback signal read from the disc and generates a detection signal tracking the DC level fluctuation. A selector selects a detection signal or a null signal without valid polarity based on the detection signal generated by the detection signal generator and input to the selector. A clamping unit performs a clamping process to suppress DC level fluctuation in the playback signal based on the detection signal when the selection unit selects the detection signal, and does not perform the clamping process when the selection unit selects the null signal. A signal processor performs specific signal processes based on clamping unit output.Type: ApplicationFiled: April 25, 2001Publication date: December 27, 2001Inventors: Shinichi Konishi, Takeshi Nakajima, Harumitsu Miyashita, Toshihiko Takahashi, Toshiya Akagi, Yuji Hisakado, Yukihiro Yamasaki
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Publication number: 20010026516Abstract: The invention provides an optical disc device and a method of determining an optimal laser power for data recording by trial recording before recording actually user data even when there are fingerprints in the test track area for the trial recording. The BER (Byte Error Rate) is detected in each recorded sector. If the BER is less than a particular threshold value, the sector is taken as OK (good). Otherwise the sector is taken as NG (no good). While the peak power level is gradually changed or decreased from the power level at which half or more of the plural reproduced sectors are OK, a boundary peak power at which half or more of the sectors become NG is found. Based on the found boundary power, amount of the optimal peak power is determined.Type: ApplicationFiled: March 22, 2001Publication date: October 4, 2001Inventors: Mamoru Shoji, Ariaki Ito, Takashi Ishida, Yukihiro Yamasaki, Toshiya Akagi
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Patent number: 6236629Abstract: An optical disk is operated in a ZCLV system for generating a stable and precise clock and the operation proceeds with a speed change of a high-speed motor when data is stored with the motor accelerated or decelerated at a high speed to improve accessibility for data storage. The optical disk includes: a disk rotator for rotating the optical disk at an optional number of rotations; a rotation controller for controlling rotation of the optical disk; a wobble extractor for extracting wobbling on the track of the optical disk; a clock extractor for extracting a clock element from the wobbling; a speed detector for detecting a linear speed of the optical disk; and a response switch for switching a response of the clock extractor, in which the response of the clock extractor is switched depending on the linear speed of the optical disk.Type: GrantFiled: October 23, 2000Date of Patent: May 22, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yuji Hisakado, Toshiya Akagi, Yukihiro Yamasaki
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Patent number: 6205095Abstract: A regenerated signal process circuit of an optical disk device is developed to solve the problem that a jitter margin is lowered without an optimum regeneration condition because, when data is regenerated independent of a transfer rate, a data frequency fluctuates against a set value of an AGC, a waveform equalization circuit, a binarization circuit, or the like. In a signal process circuit, a set value of the AGC (104), the waveform equalization circuit (105), the binarization circuit (106), or the like is controlled by referring to the amount of oscillation control current of the VCO (1002) of a frequency synthesizer. The characteristics of the VCO of the data PLL (1001) is set equal to the characteristics of the VCO (1002) of the frequency synthesizer, and each set value is controlled by referring to the oscillation control current of each VCO. Then, the reference current is switched depending on the synchronization state of the data PLL (1001).Type: GrantFiled: December 15, 1998Date of Patent: March 20, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yuji Hisakado, Chikashi Inokuchi, Yukihiro Yamasaki
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Patent number: 6172952Abstract: An optical disk device of the present invention performs at least one of recording and reproduction of an optical disk in which a wobble signal is included along a data-recording track, by rotating the optical disk and by scanning the track on the optical disk using an optical head. The device includes: an extraction section for extracting the wobble signal of the optical disk from an output of the optical head; a synchronization clock generation section for generating a synchronization clock signal based on the wobble signal extracted by the extraction section; and a recording/reproduction section for performing at least one of recording and reproduction of data to/from the optical disk by the synchronization clock signal generated by the synchronization clock generation section.Type: GrantFiled: June 10, 1998Date of Patent: January 9, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Chikashi Inokuchi, Yukihiro Yamasaki, Yuji Hisakado, Jun'ichi Minamino, Shigeru Furumiya
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Patent number: RE39306Abstract: An optical disc drive usable with discs to which data is continuously recorded and discs having a sector format can quickly resume playback signal output after passing imperfection causing potential reading errors, and plays disc with few read errors. A detection signal generator detects DC level fluctuation in the playback signal read from the disc and generates a detection signal tracking the DC level fluctuation. A selector selects a detection signal or a null signal without valid polarity based on the detection signal generated by the detection signal generator and input to the selector. A clamping unit performs a clamping process to suppress DC level fluctuation in the playback signal based on the detection signal when the selection unit selects the detection signal, and does not perform the clamping process when the selection unit selects the null signal. A signal processor performs specific signal processes based on clamping unit output.Type: GrantFiled: February 25, 2004Date of Patent: September 26, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shinichi Konishi, Takeshi Nakajima, Harumitsu Miyashita, Toshihiko Takahashi, Toshiya Akagi, Yuji Hisakado, Yukihiro Yamasaki