Patents by Inventor Nobuhiro Shibata
Nobuhiro Shibata 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: 20240337960Abstract: A toner comprising: a toner particle comprising a binder resin, a release agent, and a graft polymer (A), wherein the binder resin comprises an amorphous polyester, the graft polymer (A) has two or more exothermic peaks measured by differential scanning calorimetric measurement, the release agent has at least one exothermic peak, and when, among exothermic peaks of the graft polymer (A), a peak temperature of a highest temperature-side exothermic peak is indicated by TMax (° C.), a peak temperature of a lowest temperature-side exothermic peak is indicated by TMin (° C.), and, among exothermic peaks of the release agent, a peak temperature of a maximum exothermic peak is indicated by TWax (° C.), TMax, TMin and TWax satisfy relationships of formulae (1) and (2) below: 5. ? T Max - T Min ? 20. , and ( 1 ) 10. ? T Wax - T Max ? 40. .Type: ApplicationFiled: March 26, 2024Publication date: October 10, 2024Inventors: YUU NISHIMURA, KENTARO KAMAE, KENTA MITSUIKI, NOBUHIRO YOSHIDA, MAKI IMURA, KOHEI YOSHIYAMA, KAZUNARI OOYAMA, NOBUYOSHI SUGAHARA, YUYA CHIMOTO, TAKAHO SHIBATA
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Publication number: 20240329551Abstract: A toner is provided, which has a toner particle that contains a binder resin which contains an amorphous resin A and a crystalline polyester C, wherein the amorphous resin A and the crystalline polyester C each has a structure of a specific straight-chain aliphatic polyhydric alcohol, the amorphous resin A has a structure in which a polyester is crosslinked with a vinyl polymer, and the melting point of the crystalline polyester C and the weight-average molecular weight of the amorphous resin A lie within respective specific ranges.Type: ApplicationFiled: March 22, 2024Publication date: October 3, 2024Inventors: KENTARO KAMAE, KENTA MITSUIKI, NOBUHIRO YOSHIDA, MAKI IMURA, KOHEI YOSHIYAMA, YUU NISHIMURA, KAZUNARI OOYAMA, NOBUYOSHI SUGAHARA, YUYA CHIMOTO, TAKAHO SHIBATA
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Patent number: 12088511Abstract: An object is to provide a communication system, a communication method, a transmission-side switching device, a reception-side switching device, and a program that can carry out network switching of a plurality of L2NWs with a short communication disconnection time without limiting topology. A transmission-side accommodation SW duplicates a frame received from a transmission-side user device and transfers the frame to a plurality of L2NWs to which the transmission-side accommodation SW is connected. When receiving a frame from any one of the plurality of L2NWs to which a reception-side accommodation SW is connected, the reception-side accommodation SW transfers, to a reception-side user device, only a frame from one L2NW allowed to transfer a frame to an access accommodation port and discards frames from the other L2NWs. At a switching time of the L2NWs, the reception-side accommodation SW changes the L2NW allowed to transmit a frame to the access accommodation port.Type: GrantFiled: February 28, 2020Date of Patent: September 10, 2024Assignee: Nippon Telegraph and Telephone CorporationInventors: Nobuhiro Shibata, Hideo Kawata, Hideaki Kimura, Shinichi Yoshihara
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Patent number: 12010087Abstract: An object of the present disclosure is to reduce band compression even in a case where a frame addressed to an original (overwritten) MAC is received again after a MAC address is overwritten. A communication device according to the present disclosure measures a traffic amount in any predetermined determination data unit, holds MAC entry information including the measured traffic amount and a MAC address in a MAC learning data holding unit, at the time when the number of pieces of MAC entry information held by the MAC learning data holding unit reaches an upper limit, searches for minimum MAC entry information with a minimum traffic amount from among traffic data amounts in determination data unit held by the MAC learning data holding unit, and overwrites the minimum MAC entry information obtained by search with unlearned MAC entry information that is not held by the MAC learning data holding unit.Type: GrantFiled: July 3, 2020Date of Patent: June 11, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Nobuhiro Shibata, Hideo Kawata, Shinichi Yoshihara
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Publication number: 20240073527Abstract: An image stabilization control apparatus performs image stabilization by controlling a first correction unit that drives a correction lens included in an imaging optical system and a second correction unit that drives an image sensor, and by selecting one of a plurality of control methods including first and second control methods based on a focal length of the imaging optical system, and obtaining a correction amount of one of the first and second correction unit based on a shake amount from detection unit and on the control method selected by the selection unit. The first control method is to perform an over-correction using the first correction unit and an inverse-correction using the second correction unit.Type: ApplicationFiled: August 23, 2023Publication date: February 29, 2024Inventor: Nobuhiro SHIBATA
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Publication number: 20240073526Abstract: An image stabilization control apparatus performs image stabilization by controlling first correction unit that drives a correction lens in an imaging optical system and second correction unit that drives an image sensor by selecting one of control methods including first and second control methods in accordance with whether the imaging optical system is compatible with the first control method, and obtaining correction amounts of the first and second correction unit based on a shake amount and on the selected control method. The first control method is to perform an over-correction using the first correction unit and an inverse-correction using the second correction unit. The second control method is a method to correct the shake amount using a preset ratio for the first and second correction unit.Type: ApplicationFiled: August 23, 2023Publication date: February 29, 2024Inventor: Nobuhiro SHIBATA
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Patent number: 11863870Abstract: An image stabilization apparatus that reduces image blurring by moving a correction mechanism in accordance with a motion of an image capture apparatus is disclosed. The apparatus controls a movement of the correction mechanism in accordance with a target position of the correction mechanism, the target position being intended to reduce the image blurring. The apparatus detects a vibration of a preset frequency included in the motion, the preset frequency being higher than a first frequency of a vibration caused by a camera shake. The apparatus, in a case where the vibration of the preset frequency has been detected, further reduces a control gain used for controlling the movement of the correction mechanism compared to a case where the vibration of the preset frequency has not been detected.Type: GrantFiled: September 7, 2022Date of Patent: January 2, 2024Assignee: CANON KABUSHIKI KAISHAInventor: Nobuhiro Shibata
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Publication number: 20230336501Abstract: An object is to provide a communication system, a communication method, a transmission-side switching device, a reception-side switching device, and a program that can carry out network switching of a plurality of L2NWs with a short communication disconnection time without limiting topology. A transmission-side accommodation SW duplicates a frame received from a transmission-side user device and transfers the frame to a plurality of L2NWs to which the transmission-side accommodation SW is connected. When receiving a frame from any one of the plurality of L2NWs to which a reception-side accommodation SW is connected, the reception-side accommodation SW transfers, to a reception-side user device, only a frame from one L2NW allowed to transfer a frame to an access accommodation port and discards frames from the other L2NWs. At a switching time of the L2NWs, the reception-side accommodation SW changes the L2NW allowed to transmit a frame to the access accommodation port.Type: ApplicationFiled: February 28, 2020Publication date: October 19, 2023Inventors: Nobuhiro SHIBATA, Hideo KAWATA, Hideaki KIMURA, Shinichi YOSHIHARA
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Publication number: 20230300103Abstract: An object of the present disclosure is to reduce band compression even in a case where a frame addressed to an original (overwritten) MAC is received again after a MAC address is overwritten. A communication device according to the present disclosure measures a traffic amount in any predetermined determination data unit, holds MAC entry information including the measured traffic amount and a MAC address in a MAC learning data holding unit, at the time when the number of pieces of MAC entry information held by the MAC learning data holding unit reaches an upper limit, searches for minimum MAC entry information with a minimum traffic amount from among traffic data amounts in determination data unit held by the MAC learning data holding unit, and overwrites the minimum MAC entry information obtained by search with unlearned MAC entry information that is not held by the MAC learning data holding unit.Type: ApplicationFiled: July 3, 2020Publication date: September 21, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Nobuhiro SHIBATA, Hideo KAWATA, Shinichi YOSHIHARA
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Publication number: 20230231807Abstract: The disclosure has an object to allow local expansion without causing any loop. The disclosure is a system to which two nodes respectively belonging to different ring networks are connected, wherein the two nodes are connected to each other using a predetermined customized port, upon receipt of a predetermined unicast frame, one of the two nodes transmits the frame to another of the two nodes using the customized port, upon receipt of the predetermined unicast frame from the customized port, the other of the two nodes forwards the unicast frame, and upon receipt of a frame different from the predetermined unicast frame from the customized port, the other of the two nodes discards the frame.Type: ApplicationFiled: June 5, 2020Publication date: July 20, 2023Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hideo KAWATA, Nobuhiro SHIBATA, Keisuke YAMAGATA, Shinichi YOSHIHARA
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Publication number: 20230090592Abstract: An image stabilization apparatus that reduces image blurring by moving a correction mechanism in accordance with a motion of an image capture apparatus is disclosed. The apparatus controls a movement of the correction mechanism in accordance with a target position of the correction mechanism, the target position being intended to reduce the image blurring. The apparatus detects a vibration of a preset frequency included in the motion, the preset frequency being higher than a first frequency of a vibration caused by a camera shake. The apparatus, in a case where the vibration of the preset frequency has been detected, further reduces a control gain used for controlling the movement of the correction mechanism compared to a case where the vibration of the preset frequency has not been detected.Type: ApplicationFiled: September 7, 2022Publication date: March 23, 2023Inventor: Nobuhiro Shibata
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Patent number: 11575833Abstract: An apparatus includes a calculation unit configured to calculate a target correction amount based on a shake, a stabilization control unit configured to provide control on driving of a sensor in a direction intersecting an optical axis of a pickup optical system, based on the target correction amount, an autofocusing control unit configured to provide control on focusing based on an image signal output from the sensor, and a setting unit configured to set a limit value for the target correction amount based on a characteristic of the pickup optical system and focusing accuracy of the autofocusing unit. The setting unit is configured to change the limit value depending on the pickup condition, and is capable of setting a first limit value based on the characteristic and a second limit value based on the focusing accuracy.Type: GrantFiled: April 14, 2021Date of Patent: February 7, 2023Assignee: CANON KABUSHIKI KAISHAInventor: Nobuhiro Shibata
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Patent number: 11190687Abstract: There is provided an image blur correction control apparatus for correcting image blur of an image capturing apparatus through sharing with a second image blur correction control apparatus in accordance with a predetermined sharing rule. In a case where a first characteristic of the first detector is better than a second characteristic of a second detector included in the second image blur correction unit, a first deciding unit decides a first cutoff frequency based on shake information detected by the first detector, a transmitting unit transmits the first cutoff frequency to the second image blur correction control apparatus as a cutoff frequency to be used by the second image blur correction control apparatus, and a filtering unit performs filter processing on the shake information detected by the first detector. The first cutoff frequency is applied in the filter processing.Type: GrantFiled: June 23, 2020Date of Patent: November 30, 2021Assignee: CANON KABUSHIKI KAISHAInventor: Nobuhiro Shibata
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Publication number: 20210337122Abstract: An apparatus includes a calculation unit configured to calculate a target correction amount based on a shake, a stabilization control unit configured to provide control on driving of a sensor in a direction intersecting an optical axis of a pickup optical system, based on the target correction amount, an autofocusing control unit configured to provide control on focusing based on an image signal output from the sensor, and a setting unit configured to set a limit value for the target correction amount based on a characteristic of the pickup optical system and focusing accuracy of the autofocusing unit. The setting unit is configured to change the limit value depending on the pickup condition, and is capable of setting a first limit value based on the characteristic and a second limit value based on the focusing accuracy.Type: ApplicationFiled: April 14, 2021Publication date: October 28, 2021Inventor: Nobuhiro Shibata
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Publication number: 20200412955Abstract: There is provided an image blur correction control apparatus for correcting image blur of an image capturing apparatus through sharing with a second image blur correction control apparatus in accordance with a predetermined sharing rule. In a case where a first characteristic of the first detector is better than a second characteristic of a second detector included in the second image blur correction unit, a first deciding unit decides a first cutoff frequency based on shake information detected by the first detector, a transmitting unit transmits the first cutoff frequency to the second image blur correction control apparatus as a cutoff frequency to be used by the second image blur correction control apparatus, and a filtering unit performs filter processing on the shake information detected by the first detector. The first cutoff frequency is applied in the filter processing.Type: ApplicationFiled: June 23, 2020Publication date: December 31, 2020Inventor: Nobuhiro Shibata
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Patent number: 10863078Abstract: A focus detection apparatus comprising: a setting unit that selects and sets one of a plurality of predetermined focus detection areas which include a first focus detection area and a second focus detection area located in a periphery of a screen in an image shooting mode for shooting the moon; a first calculation unit that calculates an in-focus position in the first focus detection area based on a phase difference between a pair of focus detection signals having a parallax output from an image sensor; and a second calculation unit that calculates an in-focus position in the second focus detection area based on contrast of image signals output from the image sensor.Type: GrantFiled: November 16, 2018Date of Patent: December 8, 2020Assignee: CANON KABUSHIKI KAISHAInventor: Nobuhiro Shibata
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Patent number: 10747089Abstract: An imaging apparatus includes a storage unit configured to store beforehand a focus position serving as a reference for a predetermined subject, and a unit configured to drive a focus lens at a position away by a predetermined depth from the focus position serving as a reference that is stored, and calculate a defocus amount.Type: GrantFiled: September 19, 2018Date of Patent: August 18, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Nobuhiro Shibata, Hiroaki Kurisu, Teruhiko Ueyama
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Patent number: 10498965Abstract: An image stabilization apparatus includes: a driving control unit that drives an image stabilization unit to optically correct image blur of an object image caused by a shake of an apparatus, the image stabilization unit moving the object image on a screen of an image sensor; and a focus control unit that performs control to drive a focusing lens in coordination with an operation of the image stabilization unit, the focusing lens being used to perform focus adjustment in an imaging optical system.Type: GrantFiled: March 28, 2017Date of Patent: December 3, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Yosuke Fukai, Shuichi Terada, Toshihiro Ogawa, Nobuhiro Shibata
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Publication number: 20190158760Abstract: A focus detection apparatus comprising: a setting unit that selects and sets one of a plurality of predetermined focus detection areas which include a first focus detection area and a second focus detection area located in a periphery of a screen in an image shooting mode for shooting the moon; a first calculation unit that calculates an in-focus position in the first focus detection area based on a phase difference between a pair of focus detection signals having a parallax output from an image sensor; and a second calculation unit that calculates an in-focus position in the second focus detection area based on contrast of image signals output from the image sensor.Type: ApplicationFiled: November 16, 2018Publication date: May 23, 2019Inventor: Nobuhiro Shibata
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Patent number: 10277822Abstract: An image forming apparatus which is able to shoot high-quality images while improving image stabilization performance. An optical device which corrects for image blurring is moved in a direction different from an optical axis. Focusing is controlled by calculating a shape of a contrast using AF evaluation values at respective positions of a focus lens, which moves in the direction of the optical axis, at predetermined intervals and using a position of the focus lens at which the contrast is at its peak as a position at which a bundle of rays comes to a focus on a light-incident plane of the image pickup device. During the focusing control, positions of the focus lens obtained when the AF evaluation values were obtained or the obtained AF evaluation values are corrected according to detected positions of the optical device in a direction perpendicular to the optical axis.Type: GrantFiled: April 6, 2017Date of Patent: April 30, 2019Assignee: Canon Kabushiki KaishaInventor: Nobuhiro Shibata