Patents by Inventor Hidekazu Maezawa
Hidekazu Maezawa 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: 20190018445Abstract: A portable electronic apparatus includes an electrophoretic panel, a body motion sensor that detects motion of a user, and outputs a body motion signal, a communication unit that receives a communication signal from an external apparatus, and a processing circuit that is electrically connected to the electrophoretic panel, the body motion sensor, and the communication unit, in which the processing circuit performs a refreshing process on the electrophoretic panel on the basis of either of the body motion signal and the communication signal.Type: ApplicationFiled: July 12, 2018Publication date: January 17, 2019Applicant: SEIKO EPSON CORPORATIONInventors: Ken WATANABE, Hidekazu MAEZAWA, Ikuo HAYAISHI
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Publication number: 20170245800Abstract: To provide a biological-information analyzing device, a biological-information analyzing system, and a biological-information analyzing method that can appropriately measure biological information even in a user having an athlete's heart. A biological-information analyzing device includes a biological-information detecting section configured to detect biological information of a user, a user determining section configured to determine an exercise capability of the user, an information setting section configured to set, when it is determined that the exercise capability of the user satisfies a predetermined condition, analysis information corresponding to the exercise capability of the user, and an analyzing section configured to analyze the biological information on the basis of the set analysis information.Type: ApplicationFiled: November 16, 2015Publication date: August 31, 2017Applicant: SEIKO EPSON CORPORATIONInventors: Ichiro AOSHIMA, Yusuke TAKAHASHI, Atsushi NARUSAWA, Hidekazu MAEZAWA
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Patent number: 9372096Abstract: An electronic apparatus refers to location measurement information measured in the past at each time when the latest location measurement information is output from a location measurement module with a predetermined measurement period, if measurement accuracy is good and it is regarded that a direction change has been made, determines the latest location measurement information as saving “necessary” and stores the information. If the measurement accuracy is no good or it is regarded that a positioning point shown by the latest location measurement information is an intermediate point during linear traveling, the latest location measurement information is not saved. Therefore, a data size to be saved is made smaller than that in related art and draining of a battery taken for writing of data is reduced.Type: GrantFiled: August 6, 2013Date of Patent: June 21, 2016Assignee: Seiko Epson CorporationInventors: Hidekazu Maezawa, Junichi Otsuka, Kazunori Shimoda
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Patent number: 9332524Abstract: A location of a mobile unit is intermittently measured based on a GPS satellite signal. A halt start time zone (first halt determination region) is set based on the measured location of the mobile unit when the determination is started. An each time zone (second halt determination region) is updated and set by accumulated averaging processing (statistical processing) of results of location measurements in the past. Whether or not the halt state of the mobile unit is continued is determined using whether or not the newly measured location of the mobile unit is contained in any one of the set halt determination regions.Type: GrantFiled: August 2, 2013Date of Patent: May 3, 2016Assignee: Seiko Epson CorporationInventors: Shigeru Imafuku, Hidekazu Maezawa, Eiji Kinoshita
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Publication number: 20150127285Abstract: A learning processing unit derives, using learning data in which a characteristic value based on a distribution coordinate of a detected acceleration by an acceleration sensor which configured to be worn on a body of a user is associated with a moving speed of the user, a moving speed relational expression for finding an estimated speed from the characteristic value. A moving speed estimation unit finds an estimated speed from a current characteristic value using the derived moving speed relational expression.Type: ApplicationFiled: October 30, 2014Publication date: May 7, 2015Inventors: Tsubasa SHIRAI, Fumikazu SANO, Akifumi HAYASHI, Kazuhiko TSUCHIMOTO, Ryota HIRAKAWA, Hidekazu MAEZAWA
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Publication number: 20140097983Abstract: An execution method of a position calculating circuit that calculates a position by receiving a satellite signal transmitted from a positioning satellite and that has an externally readable storage section includes: receiving a selection signal for selecting acquired information, which is information acquired from information obtained from the satellite signal, from the outside; selecting the acquired information on the basis of the selection signal; and storing the acquired information in the storage section and outputting a notice signal, which indicates that the acquired information has been obtained, when the acquired information selected from the satellite signal being received is obtained.Type: ApplicationFiled: December 6, 2013Publication date: April 10, 2014Applicant: Seiko Epson CorporationInventors: Toshikazu AKIYAMA, Hidekazu MAEZAWA, Norio TERUUCHI, Kazunari KOBAYASHI
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Publication number: 20140046588Abstract: An electronic apparatus refers to location measurement information measured in the past at each time when the latest location measurement information is output from a location measurement module with a predetermined measurement period, if measurement accuracy is good and it is regarded that a direction change has been made, determines the latest location measurement information as saving “necessary” and stores the information. If the measurement accuracy is no good or it is regarded that a positioning point shown by the latest location measurement information is an intermediate point during linear traveling, the latest location measurement information is not saved. Therefore, a data size to be saved is made smaller than that in related art and draining of a battery taken for writing of data is reduced.Type: ApplicationFiled: August 6, 2013Publication date: February 13, 2014Applicant: Seiko Epson CorporationInventors: Hidekazu Maezawa, Junichi Otsuka, Kazunori Shimoda
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Publication number: 20140045519Abstract: A location of a mobile unit is intermittently measured based on a GPS satellite signal. A halt start time zone (first halt determination region) is set based on the measured location of the mobile unit when the determination is started. An each time zone (second halt determination region) is updated and set by accumulated averaging processing (statistical processing) of results of location measurements in the past. Whether or not the halt state of the mobile unit is continued is determined using whether or not the newly measured location of the mobile unit is contained in any one of the set halt determination regions.Type: ApplicationFiled: August 2, 2013Publication date: February 13, 2014Applicant: Seiko Epson CorporationInventors: Shigeru IMAFUKU, Hidekazu MAEZAWA, Eiji KINOSHITA
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Patent number: 8629804Abstract: An execution method of a position calculating circuit that calculates a position by receiving a satellite signal transmitted from a positioning satellite and that has an externally readable storage section includes: receiving a selection signal for selecting acquired information, which is information acquired from information obtained from the satellite signal, from the outside; selecting the acquired information on the basis of the selection signal; and storing the acquired information in the storage section and outputting a notice signal, which indicates that the acquired information has been obtained, when the acquired information selected from the satellite signal being received is obtained.Type: GrantFiled: October 11, 2010Date of Patent: January 14, 2014Assignee: Seiko Epson CorporationInventors: Toshikazu Akiyama, Hidekazu Maezawa, Norio Teruuchi, Kazunari Kobayashi
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Patent number: 8373592Abstract: A method of determining an initial position in executing a positioning calculation based on satellite signals from positioning satellites, includes: (a) executing position converging calculation based on the satellite signals using each of a plurality of first candidate positions as a provisional initial position; (b) selecting at least one second candidate position from the first candidate positions based on a calculation result of the position converging calculation; and (c) selecting the initial position from one of the second candidate positions using the satellite signals.Type: GrantFiled: August 11, 2009Date of Patent: February 12, 2013Assignee: Seiko Epson CorporationInventors: Hidekazu Maezawa, Kiyotaka Muraki
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Publication number: 20110084875Abstract: An execution method of a position calculating circuit that calculates a position by receiving a satellite signal transmitted from a positioning satellite and that has an externally readable storage section includes: receiving a selection signal for selecting acquired information, which is information acquired from information obtained from the satellite signal, from the outside; selecting the acquired information on the basis of the selection signal; and storing the acquired information in the storage section and outputting a notice signal, which indicates that the acquired information has been obtained, when the acquired information selected from the satellite signal being received is obtained.Type: ApplicationFiled: October 11, 2010Publication date: April 14, 2011Applicant: SEIKO EPSON CORPORATIONInventors: Toshikazu Akiyama, Hidekazu Maezawa, Norio Teruuchi, Kazunari Kobayashi
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Publication number: 20100176988Abstract: A method of determining an initial position in executing a positioning calculation based on satellite signals from positioning satellites, includes: (a) executing position converging calculation based on the satellite signals using each of a plurality of first candidate positions as a provisional initial position; (b) selecting at least one second candidate position from the first candidate positions based on a calculation result of the position converging calculation; and (c) selecting the initial position from one of the second candidate positions using the satellite signals.Type: ApplicationFiled: August 11, 2009Publication date: July 15, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Hidekazu MAEZAWA, Kiyotaka MURAKI
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Patent number: 7741995Abstract: A terminal device receives satellite signals from a plurality of satellite positioning system (SPS) satellites and locates a position. The terminal device periodically calculates a first drift df1 of a local oscillator using a reference frequency Hr, calculates a search range of the satellite signal using the first drift df1, calculates a second drift df2 of the local oscillator using a reception frequency of the satellite signal, calculates a reference frequency error ? which is an error of the reference frequency by calculating a difference between the first drift df1 and the second drift df2, and calculates an error correction value ?av of the reference frequency by subjecting a plurality of the reference frequency errors ? to a statistical process.Type: GrantFiled: August 29, 2007Date of Patent: June 22, 2010Assignee: Seiko Epson CorporationInventors: Hidekazu Maezawa, Koichiro Yano
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Publication number: 20080068258Abstract: A terminal device receives satellite signals from a plurality of satellite positioning system (SPS) satellites and locates a position. The terminal device periodically calculates a first drift df1 of a local oscillator using a reference frequency Hr, calculates a search range of the satellite signal using the first drift df1, calculates a second drift df2 of the local oscillator using a reception frequency of the satellite signal, calculates a reference frequency error ? which is an error of the reference frequency by calculating a difference between the first drift df1 and the second drift df2, and calculates an error correction value ?av of the reference frequency by subjecting a plurality of the reference frequency errors ? to a statistical process.Type: ApplicationFiled: August 29, 2007Publication date: March 20, 2008Applicant: SEIKO EPSON CORPORATIONInventors: Hidekazu MAEZAWA, Koichiro YANO
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Patent number: 6501429Abstract: The present invention relates to a small portable information processing apparatus. A GPS unit (11, 300) is attachable to and detachable from a rear surface of a portable information terminal (10, 350), so that the GPS unit (11, 300) can be mounted on the rear surface of the portable information terminal (10, 350) to make it serviceable only when necessary, thus improving convenience. Power is supplied to the GPS unit (11, 300, 650) only when an antenna unit (112, 500, 613) is set in a serviceable state. This prevents the exhaustion of a battery.Type: GrantFiled: June 14, 2001Date of Patent: December 31, 2002Assignee: Seiko Epson CorporationInventors: Akiyoshi Nakamura, Akira Momose, Hidekazu Maezawa
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Publication number: 20010029588Abstract: The present invention relates to a small portable information processing apparatus. A GPS unit (11, 300) is attachable to and detachable from a rear surface of a portable information terminal (10, 350), so that the GPS unit (11, 300) can be mounted on the rear surface of the portable information terminal (10, 350) to make it serviceable only when necessary, thus improving convenience. Power is supplied to the GPS unit (11, 300, 650) only when an antenna unit (112, 500, 613) is set in a serviceable state. This prevents the exhaustion of a battery.Type: ApplicationFiled: June 14, 2001Publication date: October 11, 2001Inventors: Akiyoshi Nakamura, Akira Momose, Hidekazu Maezawa