Patents by Inventor Katsutoshi KONDO
Katsutoshi KONDO 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).
-
Patent number: 12155216Abstract: An object of the invention is to provide a control technique capable of connecting a storage battery to a DC bus via a DC/DC converter and controlling charging and discharging of the storage battery by the DC/DC converter. A DC grid system according to the invention calculates a voltage command value of a DC bus using a present voltage of a storage battery and a target voltage of the storage battery, and provides the voltage command value as a command value for each of an AC/DC converter and a DC/DC converter (see FIG. 1).Type: GrantFiled: October 6, 2021Date of Patent: November 26, 2024Assignee: HITACHI, LTD.Inventors: Ryo Wakabayashi, Toru Kouno, Satoru Akiyama, Emha Bayu Miftahullatif, Katsutoshi Kondo
-
Publication number: 20240329436Abstract: An optical waveguide device includes a first substrate including a first optical waveguide and a low refractive index layer covering the first optical waveguide and being formed of a material having a lower refractive index than a refractive index of the first optical waveguide, and a second substrate joined to the first substrate and including a rib type optical waveguide which is a second optical waveguide and is formed of a material having an electro-optic effect, in which the first optical waveguide and the second optical waveguide have parts optically coupled to each other, and in plan view of the optical waveguide device, a protruding portion is formed in the second substrate in a boundary portion where the first optical waveguide overlaps with the second substrate, and a thickness of the second substrate in the protruding portion is set to be thinner than a thickness of the second substrate in the second optical waveguide.Type: ApplicationFiled: December 20, 2023Publication date: October 3, 2024Applicant: SUMITOMO OSAKA CEMENT CO., LTD.Inventors: Katsutoshi KONDO, Junichiro ICHIKAWA
-
Publication number: 20240210485Abstract: The purpose of the present invention is to provide a technique capable of accurately estimating SOH without relying on a calculation standard of a capacity change when obtaining the SOH. The battery state estimation device according to the present invention specifies a first period and a second period in a stop period after a battery has completed charging or discharging and refers to the relationship between an estimated value of the state of health of the battery and a measured value of the state of health, thereby estimating the measured value, said estimated value being obtained using the difference between the output voltages in the second period (refer to FIG. 5A).Type: ApplicationFiled: February 24, 2022Publication date: June 27, 2024Inventors: Toru KOUNO, Emha Bayu MIFTAHULLATIF, Hiroya FUJIMOTO, Yutaka UEDA, Katsutoshi KONDO
-
Publication number: 20240125860Abstract: The objective of the present invention is to provide a technology capable of estimating a battery condition in conjunction with charging/discharging operations of a battery, without employing dedicated equipment for estimating the condition of the battery. A battery management device according to the present invention identifies a first period and a subsequent second period in a rest period after a battery finishes discharging or charging, and uses an output voltage difference in the second period to estimate the condition of the battery (see FIG. 1).Type: ApplicationFiled: March 30, 2022Publication date: April 18, 2024Inventors: Emha Bayu MIFTAHULLATIF, Toru KOUNO, Hiroya FUJIMOTO, Yutaka UEDA, Katsutoshi KONDO
-
Publication number: 20230378759Abstract: An object of the invention is to provide a control technique capable of connecting a storage battery to a DC bus via a DC/DC converter and controlling charging and discharging of the storage battery by the DC/DC converter. A DC grid system according to the invention calculates a voltage command value of a DC bus using a present voltage of a storage battery and a target voltage of the storage battery, and provides the voltage command value as a command value for each of an AC/DC converter and a DC/DC converter (see FIG. 1).Type: ApplicationFiled: October 6, 2021Publication date: November 23, 2023Inventors: Ryo WAKABAYASHI, Toru KOUNO, Satoru AKIYAMA, Emha Bayu MIFTAHULLATIF, Katsutoshi KONDO
-
Patent number: 11656486Abstract: An optical waveguide device including an optical waveguide substrate that has an electro-optic effect, is a crystal having anisotropy in thermal expansion rate, has a thickness set to 10 ?m or lower, and includes an optical waveguide and a holding substrate that holds the optical waveguide substrate, the optical waveguide substrate and the holding substrate being joined to each other, in which the holding substrate is formed of a crystal having a lower dielectric constant than the optical waveguide substrate and having anisotropy in thermal expansion rate, and the optical waveguide substrate and the holding substrate are joined to each other such that differences in thermal expansion rate between the optical waveguide substrate and the holding substrate become small in different axial directions on a joint surface.Type: GrantFiled: December 21, 2020Date of Patent: May 23, 2023Assignee: SUMITOMO OSAKA CEMENT CO., LTD.Inventors: Yuki Kugimoto, Yumi Murata, Katsutoshi Kondo
-
Patent number: 11347086Abstract: To provide an optical element in which an electrode is directly formed on an LN substrate, and a drift phenomenon is suppressed. In an optical element including: a substrate made of lithium niobate crystals; and an electrode disposed on the substrate, the substrate and the electrode are in direct contact with each other, and as a contact metal disposed on a surface of the electrode where the electrode is in contact with the substrate, a metal material whose standard enthalpy of formation per coordinate bond upon oxidation is greater than a standard enthalpy of formation per coordinate bond of niobium pentoxide is used.Type: GrantFiled: February 27, 2019Date of Patent: May 31, 2022Assignee: SUMITOMO OSAKA CEMENT CO., LTD.Inventors: Katsutoshi Kondo, Kiyotaka Nakano, Eiji Murakami, Junichiro Ichikawa
-
Publication number: 20210199996Abstract: An optical waveguide device including an optical waveguide substrate that has an electro-optic effect, is a crystal having anisotropy in thermal expansion rate, has a thickness set to 10 ?m or lower, and includes an optical waveguide and a holding substrate that holds the optical waveguide substrate, the optical waveguide substrate and the holding substrate being joined to each other, in which the holding substrate is formed of a crystal having a lower dielectric constant than the optical waveguide substrate and having anisotropy in thermal expansion rate, and the optical waveguide substrate and the holding substrate are joined to each other such that differences in thermal expansion rate between the optical waveguide substrate and the holding substrate become small in different axial directions on a joint surface.Type: ApplicationFiled: December 21, 2020Publication date: July 1, 2021Applicant: Sumitomo Osaka Cement Co., Ltd.Inventors: Yuki KUGIMOTO, Yumi MURATA, Katsutoshi KONDO
-
Publication number: 20210026165Abstract: To provide an optical element in which an electrode is directly formed on an LN substrate, and a drift phenomenon is suppressed. In an optical element including: a substrate made of lithium niobate crystals; and an electrode disposed on the substrate, the substrate and the electrode are in direct contact with each other, and as a contact metal disposed on a surface of the electrode where the electrode is in contact with the substrate, a metal material whose standard enthalpy of formation per coordinate bond upon oxidation is greater than a standard enthalpy of formation per coordinate bond of niobium pentoxide is used.Type: ApplicationFiled: February 27, 2019Publication date: January 28, 2021Applicant: SUMITOMO OSAKA CEMENT CO.,LTD.Inventors: Katsutoshi KONDO, Kiyotaka NAKANO, Eiji MURAKAMI, Junichiro ICHIKAWA
-
Patent number: 9779897Abstract: The switch includes the base, a plurality of the fixed contact terminals, the sliding body, the operation lever, the coil spring, and the cover. From above the base, the fixed contact terminals, the sliding body, the operation lever, and the coil spring are mounted to the base, and the sliding body is pressed against the operation lever to position the operation lever. The cover is mounted to the base from above so as to press the operation lever by the pressing portion of the cover and cause the operation lever to rotate to an initial position.Type: GrantFiled: November 26, 2014Date of Patent: October 3, 2017Assignee: OMRON CorporationInventors: Kenji Shinohara, Kenji Takahama, Naoki Torikai, Hiromitsu Kokabu, Katsutoshi Kondo
-
Publication number: 20170011872Abstract: The switch includes the base, a plurality of the fixed contact terminals, the sliding body, the operation lever, the coil spring, and the cover. From above the base, the fixed contact terminals, the sliding body, the operation lever, and the coil spring are mounted to the base, and the sliding body is pressed against the operation lever to position the operation lever. The cover is mounted to the base from above so as to press the operation lever by the pressing portion of the cover and cause the operation lever to rotate to an initial position.Type: ApplicationFiled: November 26, 2014Publication date: January 12, 2017Applicant: OMRON CorporationInventors: Kenji SHINOHARA, Kenji TAKAHAMA, Naoki TORIKAI, Hiromitsu KOKABU, Katsutoshi KONDO
-
Patent number: 9484819Abstract: A regulator device includes: a plurality of regulators that are equipped in parallel between a power input terminal and a power output terminal and converts a power inputted from the power input terminal to output to the power output terminal; a dummy load circuit that is coupled to a power output system different from a power output system to the respective power output terminal of the plurality of regulators; a selector that selects a regulator to carry out an output to the power output terminal and a regulator to carry out an output to the dummy load circuit among the plurality of regulators; and a controller that obtains conversion efficiency characteristic information representing a characteristic of power conversion efficiency relative to a current flowing in the dummy load circuit for the regulator to carry out an output to the dummy load circuit.Type: GrantFiled: October 1, 2012Date of Patent: November 1, 2016Assignee: FUJITSU LIMITEDInventors: Katsutoshi Kondo, Kazunori Kasuga, Hirofumi Shimizu
-
Patent number: 9197130Abstract: A regulator device includes: a power input terminal; a power output terminal; a plurality of regulators each including an operating FET and a monitoring FET to be driven together with the operating FET, the plurality of regulators being arranged in parallel between the power input terminal and the power output terminal; and a controller configured to drive the operating FET and the monitoring FET included in one of the regulators, when the controller determines whether the monitoring FET included in the one of the regulators have degraded, the controller configured to stop driving the operating FET and the monitoring FET included in the one of the regulators and configured to drive the operating FET and the monitoring FET included in another of the regulators.Type: GrantFiled: June 27, 2013Date of Patent: November 24, 2015Assignee: FUJITSU LIMITEDInventors: Hirofumi Shimizu, Kazunori Kasuga, Katsutoshi Kondo
-
Publication number: 20140362005Abstract: An information terminal device includes an input unit that inputs, when a touch operation performed in a detection area that is associated with one of keys of a software keyboard displayed on a screen has been detected, a character associated with the key in the detection area. The information terminal device includes a determining unit that determines, when a modification of a character input by the input unit has been detected, whether the key of the pre-modification character is adjacent to a key of a post-modification character in the layout of the software keyboard. The information terminal device includes a correcting unit that extends, when the determining unit determines that the key of the pre-modification character is adjacent to the key of the post-modification character, the detection area of the key associated with the post-modification character in the arrangement direction of the key that is associated with the pre-modification character.Type: ApplicationFiled: April 30, 2014Publication date: December 11, 2014Applicant: FUJITSU LIMITEDInventors: Yuko Yazawa, Kazunori Kasuga, Hirofumi Shimizu, Katsutoshi Kondo
-
Patent number: 8680826Abstract: A regulator apparatus having an input terminal and an output terminal, the regulator apparatus includes: a plurality of regulators arranged in parallel between the input terminal and the output terminal; an conversion efficiency characteristic information obtaining unit that obtains conversion efficiency characteristic information representing a characteristic of a conversion efficiency with respect to an output current with regard to each of the plurality of regulators; a memory that stores the conversion efficiency characteristic information of each of the plurality of regulators obtained by the conversion efficiency characteristic information obtaining unit; and a switching control unit that performs a switching control on the plurality of regulators based on a value of the output current output from the output terminal and the conversion efficiency characteristic information stored in the memory.Type: GrantFiled: June 20, 2011Date of Patent: March 25, 2014Assignee: Fujitsu LimitedInventors: Katsutoshi Kondo, Kazunori Kasuga, Hirofumi Shimizu
-
Publication number: 20140049242Abstract: A regulator device includes: a power input terminal; a power output terminal; a plurality of regulators each including an operating FET and a monitoring FET to be driven together with the operating FET, the plurality of regulators being arranged in parallel between the power input terminal and the power output terminal; and a controller configured to drive the operating FET and the monitoring FET included in one of the regulators, when the controller determines whether the monitoring FET included in the one of the regulators have degraded, the controller configured to stop driving the operating FET and the monitoring FET included in the one of the regulators and configured to drive the operating FET and the monitoring FET included in another of the regulators.Type: ApplicationFiled: June 27, 2013Publication date: February 20, 2014Applicant: FUJITSU LIMITEDInventors: Hirofumi Shimizu, Kazunori Kasuga, Katsutoshi Kondo
-
Publication number: 20110309811Abstract: A regulator apparatus having an input terminal and an output terminal, the regulator apparatus includes: a plurality of regulators arranged in parallel between the input terminal and the output terminal; an conversion efficiency characteristic information obtaining unit that obtains conversion efficiency characteristic information representing a characteristic of a conversion efficiency with respect to an output current with regard to each of the plurality of regulators; a memory that stores the conversion efficiency characteristic information of each of the plurality of regulators obtained by the conversion efficiency characteristic information obtaining unit; and a switching control unit that performs a switching control on the plurality of regulators based on a value of the output current output from the output terminal and the conversion efficiency characteristic information stored in the memory.Type: ApplicationFiled: June 20, 2011Publication date: December 22, 2011Applicant: Fujitsu LimitedInventors: Katsutoshi KONDO, Kazunori Kasuga, Hirofumi Shimizu