Patents by Inventor Toshikazu Takagi
Toshikazu Takagi 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).
-
Publication number: 20240136950Abstract: An electric-power conversion apparatus includes a driving circuit that performs switching control of semiconductor switching devices, a short-circuit control means that performs short-circuit control of an electric-power conversion circuit, an excessive-current detection means that detects whether or not an abnormality caused by an excessive current exists in the semiconductor switching device, and a gate-drive-abnormality detection means that detects whether or not an abnormality exists in a gate voltage of the semiconductor switching device; based on a result of the abnormality detection by the excessive-current detection means and a result of the abnormality detection by the gate-drive-abnormality detection means, the short-circuit control means turns on all the semiconductor switching devices in any one of the upper arm and the lower arm so as to perform the short-circuit control.Type: ApplicationFiled: May 29, 2023Publication date: April 25, 2024Applicant: Mitsubishi Electric CorporationInventors: Toshikazu Takagi, Chiharu Morisaki
-
Patent number: 11967008Abstract: A greenhouse management system includes an image display, a storage that configured to store information, a greenhouse analysis chart generator that configured to generate a plurality of different greenhouse analysis charts including time axes based on the information stored in the storage, and a greenhouse operation comparison assistance that configured to simultaneously display a plurality of different greenhouse analysis charts on the image display.Type: GrantFiled: August 25, 2020Date of Patent: April 23, 2024Assignee: OMRON CORPORATIONInventors: Kazunari Miyake, Jiro Iwata, Hiroshi Takagi, Atsushi Nagashima, Toshikazu Sugiki
-
Patent number: 11711897Abstract: The power conversion device includes: a main circuit having first and second wiring layers formed respectively on both surfaces of a base board, mounted parts mounted on the first and second wiring layers, and first and second GND layers formed respectively, between external- and internal-layer portions of the base board and in regions corresponding to the mounted parts each being a mounted part which forms a circuit other than a circuit having an inductance component as a lumped constant, and to the first and second wiring layers; and a cooler attached to the base board by means of fixing screws through a first through-hole created in an end portion of the board; wherein the first and second GND layers are each formed so that creepage distance is created around a second through-hole in which a lead insertion part that mutually connects the first and second wiring layers is inserted.Type: GrantFiled: September 22, 2020Date of Patent: July 25, 2023Assignee: Mitsubishi Electric CorporationInventor: Toshikazu Takagi
-
Publication number: 20220173658Abstract: A DC/DC converter includes a power conversion unit for converting input voltage to required voltage, a first control unit for driving the power conversion unit, a power supply device which supplies power to the first control unit and uses an output of the DC/DC converter or a battery as a power supply source, and a power supply function for controlling supply of power to the power supply device. The power supply function is controlled with respect to supply of power, by a second control unit of a power conversion device during a standby state of the DC/DC converter.Type: ApplicationFiled: June 20, 2019Publication date: June 2, 2022Applicant: Mitsubishi Electric CorporationInventor: Toshikazu TAKAGI
-
Patent number: 11264889Abstract: There is provided an electric-power conversion apparatus that can protect semiconductor switching devices in accordance with the ambient temperature. The electric-power conversion apparatus includes a comparator that generates an output based on a comparison between the output of a sensor and a threshold value, a reference voltage circuit that produces the threshold value, and a control circuit that is configured in such a way as to be able to stop operation of a main circuit, based on the output of the comparator; the reference voltage circuit is configured in such a way as to change the threshold value in accordance with an ambient temperature under which semiconductor switching devices are laid.Type: GrantFiled: March 27, 2020Date of Patent: March 1, 2022Assignee: Mitsubishi Electric CornorationInventors: Hajime Takahashi, Toshikazu Takagi
-
Publication number: 20210176869Abstract: The power conversion device includes: a main circuit having first and second wiring layers formed respectively on both surfaces of a base board, mounted parts mounted on the first and second wiring layers, and first and second GND layers formed respectively, between external- and internal-layer portions of the base board and in regions corresponding to the mounted parts each being a mounted part which forms a circuit other than a circuit having an inductance component as a lumped constant, and to the first and second wiring layers; and a cooler attached to the base board by means of fixing screws through a first through-hole created in an end portion of the board; wherein the first and second GND layers are each formed so that creepage distance is created around a second through-hole in which a lead insertion part that mutually connects the first and second wiring layers is inserted.Type: ApplicationFiled: September 22, 2020Publication date: June 10, 2021Applicant: Mitsubishi Electric CorporationInventor: Toshikazu TAKAGI
-
Publication number: 20200389085Abstract: There is provided an electric-power conversion apparatus that can protect semiconductor switching devices in accordance with the ambient temperature. The electric-power conversion apparatus includes a comparator that generates an output based on a comparison between the output of a sensor and a threshold value, a reference voltage circuit that produces the threshold value, and a control circuit that is configured in such a way as to be able to stop operation of a main circuit, based on the output of the comparator; the reference voltage circuit is configured in such a way as to change the threshold value in accordance with an ambient temperature under which semiconductor switching devices are laid.Type: ApplicationFiled: March 27, 2020Publication date: December 10, 2020Applicant: Mitsubishi Electric CorporationInventors: Hajime TAKAHASHI, Toshikazu TAKAGI
-
Patent number: 9172010Abstract: A light-emitting device includes a substrate including a mirror surface region on its upper surface, a semiconductor light-emitting element disposed in the mirror surface region, and an encapsulating layer joined onto the upper surface of the substrate. The encapsulating layer includes a lower layer that is in contact with the upper surface of the substrate, covers the surrounding of the semiconductor light-emitting element, and contains phosphor; and an upper layer that is positioned on the lower layer, and has a larger phosphor content per unit area than that of the lower layer.Type: GrantFiled: February 27, 2013Date of Patent: October 27, 2015Assignee: NITTO DENKO CORPORATIONInventors: Shinsuke Wakiya, Toshikazu Takagi, Hirofumi Fukutsuka, Yasunari Ooyabu, Hiroyuki Katayama, Takashi Kondo, Hiroki Kono
-
Publication number: 20130228803Abstract: A light-emitting device includes a substrate including a mirror surface region on its upper surface, a semiconductor light-emitting element disposed in the mirror surface region, and an encapsulating layer joined onto the upper surface of the substrate. The encapsulating layer includes a lower layer that is in contact with the upper surface of the substrate, covers the surrounding of the semiconductor light-emitting element, and contains phosphor; and an upper layer that is positioned on the lower layer, and has a larger phosphor content per unit area than that of the lower layer.Type: ApplicationFiled: February 27, 2013Publication date: September 5, 2013Applicant: NITTO DENKO CORPORATIONInventors: Shinsuke Wakiya, Toshikazu Takagi, Hirofumi Fukutsuka, Yasunari Ooyabu, Hiroyuki Katayama, Takashi Kondo, Hiroki Kono
-
Patent number: 7498971Abstract: An in-vehicle radar device includes: phase storing means 12 that prestores the phase of a received wave incoming secondarily from outside a target; received wave importing means 13 that imports the received wave on the basis of a radio wave reception timing determined by a transmission timing of the radio wave; phase detecting means 14 that determines the phase of the received wave imported by the received wave importing means; phase correction amount extracting means 15 that compares the phase prestored by the phase storing means 12 with the phase detected by the phase detecting means 14 and extracts and stores a phase correction amount of each of element antennas; and phase correcting means 16 that corrects the phase of a received signal of each of the element antennas on the basis of the phase correction amount obtained by the phase correction amount extracting means.Type: GrantFiled: July 16, 2007Date of Patent: March 3, 2009Assignee: Mitsubishi Electric CorporationInventor: Toshikazu Takagi
-
Publication number: 20080224916Abstract: An in-vehicle radar device includes: phase storing means 12 that prestores the phase of a received wave incoming secondarily from outside a target; received wave importing means 13 that imports the received wave on the basis of a radio wave reception timing determined by a transmission timing of the radio wave; phase detecting means 14 that determines the phase of the received wave imported by the received wave importing means; phase correction amount extracting means 15 that compares the phase prestored by the phase storing means 12 with the phase detected by the phase detecting means 14 and extracts and stores a phase correction amount of each of element antennas; and phase correcting means 16 that corrects the phase of a received signal of each of the element antennas on the basis of the phase correction amount obtained by the phase correction amount extracting means.Type: ApplicationFiled: July 16, 2007Publication date: September 18, 2008Applicant: Mitsubishi Electric CorporationInventor: Toshikazu TAKAGI
-
Patent number: 5126826Abstract: A light-emitting or receiving device comprising a light-emitting or receiving element coated with a silicone resin composition and an encapsulating means for encapsulating said light-emitting or receiving element, said encapsulating means comprising a polymer of a monomer, an oligomer or a mixture thereof comprising a diallyl compound. The device has improved weatherability, chemical resistance, hardness, optical properties such as transparency, and moisture resistance.Type: GrantFiled: September 27, 1990Date of Patent: June 30, 1992Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Kakutaro Kauchi, Toru Tomoshige, Shoji Usuda, Hideyuki Kitayama, Toshikazu Takagi