Sony Corporation

Hitachi Automotive Systems, Ltd.

Oki Data Corporation

Hitachi Astemo Ltd.

Hitachi, Ltd.

Nippon Telegraph and Telephone Corporation

Shintaro Tanaka

Yuichiro Ikemoto

Koji Ashizaki

Takae Shimada

Tatsumi Ito

Takeshi Matsui

Tadahiko Chida

Takahito Suzuki

Kenji Kubo

Takashi Hirao

Seiji Kobayashi

Katsuhisa Aratani

Akihiko Kanouda

Nobutake Tsuyuno

Eiichi Ide

Junpei Kusukawa

Hironori Nagasaki

Masahiko Kaneko

Kimihisa Furukawa

Ariyoshi Nakaoki

Yuuichi Mabuchi

Fumihiro Sato

Yuji Sobu

Naoki Okawa

Akihiro Goto

Mizuki Nakahara

Takashi Shimouma

Kosuke Watanabe

Masahiro Maikuma

Mikito Komatsu

Naoya Takahashi

Eigo Kishimoto

Toru Kato

Masahito Mochizuki

Takayuki Oouchi

Takayuki Ouchi

Satoshi Tanaka

[Problem] To reduce a setting burden on a media path in a media gateway. [Solution] A MG () includes a first interface for connecting to a first network among a plurality of communication networks, a second interface for connecting to a second network among a plurality of communication networks, and a test command issuing unit () configured to establish, when a mapping between the first interface and the second interface is set by first setting data for associating a media path ID in the first interface with a termination ID in the first interface and second setting data for associating a media path ID in the second interface with a termination ID in the second interface, a test call for a media path passing through the first interface and the second interface based on the mapping and test, by assigning a resource to the media path that is established, whether data transmission and reception are possible on the media path that is established.

Media gateway device, and media path configuration method

A power semiconductor device includes a first submodule including a first power semiconductor element, a second submodule including a second power semiconductor element, a positive electrode side conductor portion and a negative electrode side conductor portion, an intermediate substrate that forms a negative electrode side facing portion facing the negative electrode side conductor portion with the first submodule sandwiched between them and a positive electrode side facing portion facing the positive electrode side conductor portion with the second submodule sandwiched between them, and a plurality of signal terminals that transmit a signal for controlling the first power semiconductor element or the second power semiconductor element. The second submodule is disposed such that directions of an electrode surface of the second power semiconductor element and an electrode surface of the first power semiconductor element are inverted, a signal relay conductor portion is disposed in a space sandwiched between a part of the second submodule and the intermediate substrate in a height direction of the second submodule, and the intermediate substrate has a wire connected to the signal relay conductor portion and electrically connected to the signal terminal. In this manner, productivity of the power semiconductor device is improved while an increase in main circuit inductance is suppressed.

Power semiconductor device

A power semiconductor apparatus includes a power semiconductor element having low and high potential side electrodes and a sense electrode, high and low potential side conductors electrically connected with the high potential side electrodes, respectively, a sense wiring electrically connected with the sense electrode, and a first metal portion facing the low potential side conductor or the low potential side conductor across the sense wiring. When viewed from an array direction of the sense wiring and the first metal portion, the sense wiring has a facing portion facing the high or low potential side conductor, the first metal portion forms a recess in a part overlapping the facing portion, and a depth of the recess is formed such that a distance between a bottom of the recess and the sense wiring is larger than a distance between the sense wiring and the high or low potential side conductor.

Power semiconductor apparatus

An object of the present invention is to sufficiently reduce a switching loss. A control device causes a positive electrode of a first voltage to appear at a second connection point by switching second and third switching elements to an ON state. Next, the control device causes the positive electrode of the first voltage to appear at a first connection point by switching the second and third switching elements to an OFF state. After that, fifth and eighth switching elements are switched to the OFF state, and sixth and seventh switching elements are switched to the ON state.

Power conversion device, power conversion device control device, and power conversion device control method

A switching loss of a power conversion device is sufficiently reduced. A DC-DC converter includes a switching circuit that converts input first DC power into AC power, a transformer that performs voltage conversion of the AC power, and an output circuit that converts the AC power subjected to the voltage conversion by the transformer into second DC power. The control circuit that controls the DC-DC converter calculates a magnetic flux density value B of the transformer and controls a drive frequency of the switching circuit based on the calculated magnetic flux density value B.

Control device with magnetic flux density calculation

A power conversion device includes: a first low voltage side circuit and a first high voltage side circuit which are connected via a first transformer; and a second low voltage side circuit and a second high voltage side circuit which are connected via a second transformer, wherein switching timings of the first high voltage side circuit and the second high voltage side circuit are controlled such that a current difference of an input current to the first low voltage side circuit and an input current to the second low voltage side circuit during a step-up operation becomes smaller than a predetermined value. A driver circuit to output a drive signal of a switching element may be included in at least one of the first low voltage side circuit and the second low voltage side circuit.

Power conversion device and power supply system using same

An object of the present invention is to provide a highly efficient power supply device. A power supply deviceaccording to the present invention includes a bidirectional DC-DC converterand an insulated DC-DC converter. The bidirectional DC-DC converterreceives a main batteryand outputs a direct-current link voltage Vlink. The insulated DC-DC converterreceives the link voltage Vlink and supplies power to a load. The link voltage Vlink, which is an output of the bidirectional DC-DC converter, changes according to the output voltage of the insulated DC-DC converter

Power supply device

The present invention aims to provide a power converter, which includes a plurality of switching power supply devices connected in parallel, with a circuit configuration that enables reduction of cost and a size of the power converter. The present invention relates to a power converter including at least a first switching power supply device and a second switching power supply device connected in parallel. A part of high-voltage-compatible switching elements is commonly used between the first switching power supply device and the second switching power supply device, and a drive gate signal of one of the high-voltage-compatible switching elements of the first switching power supply device and the second switching power supply device and a phase difference of a drive gate signal of the commonly used switching power supply device are set to be equal when a load current is a first current value or lower.

Power converter having multiple switching legs

Provided is a power conversion device which suppresses a current unbalance of a plurality of secondary circuit modules provided in parallel and is manufactured in a compact size and at a low cost. The power conversion device of the invention is a DC-DC converter which boosts down and outputs an input voltage, and includes an input circuit which includes a switching element and output circuit modules which include a transformer and a rectifier element. A plurality of the output circuit modules are provided. The plurality of output circuit modules are electrically connected to the input circuit.

Power conversion device

An exposure unit includes first and second exposure heads. The first exposure head includes: first light emitting devices each emitting a first light beam; a first optical system performing imaging of each of the first light beams; a first coupler; and a first base member. The first coupler is provided at a first position, in the first base member, based on a position at which the imaging performed by the first optical system is performed. The second exposure head includes: second light emitting devices each emitting a second light beam; a second optical system performing imaging of each of the second light beams; a second coupler; and a second base member. The second coupler is provided at a second position, in the second base member, based on a position at which the imaging performed by the second optical system is performed and is fit into the first coupler.

Exposure head, exposure unit, method of manufacturing exposure unit, light receiving head, light receiving unit, and method of manufacturing light receiving unit

A semiconductor light emission device includes a substrate, and semiconductor light emission elements mounted on the substrate and each including an anode connection pad and a cathode connection pad. At least one of the anode connection pad and the cathode connection pad has a fine shaped portion. An image formation apparatus and an image display apparatus are described using the semiconductor light emission device.

Semiconductor light emission device, image formation apparatus and image display apparatus

A light emitting device includes: a wiring including an AuGeNi layer; and a semiconductor light emitting element bonded to the surface of the AuGeNi layer with the aid of intermolecular force, and electrically connected to the wiring.

Light emitting device, light emitting element array, and image display device

A print head which includes at least two discharge nozzle lines arranged on at least two lines, out of a base line corresponding to a radial direction of the rotating print object and at least one offset lines parallel to the base line, discharges ink drops of the same color from discharge nozzles of the discharge nozzle lines, moves the print head so as to minutely move the discharge nozzle lines on the base line or the offset lines, and discharges ink drops of the same color from the discharge nozzles passing through second paths moved minutely from the first paths over the rotating print object. In this way, the ink drops are discharged on the area where print defects are caused because the area is not on the paths of the discharge nozzles before the discharge nozzles are minutely moved.

Printing apparatus, printing method, and program

A printing device includes a controlling section that converts visible information, expressed using biaxial orthogonal coordinate data, into polar coordinate data, and binarizes the polar coordinate data to generate binarized polar coordinate data. Next, the controlling section performs landing position correction on the binarized polar coordinate data, and generates ink discharge data in which displacements of landing positions of ink drops, caused by the order in which the ink drops are discharged from discharge nozzles, are corrected.

Printing device, printing method, and program

A disc recording and/or reproducing apparatus includes a disc mounting unit to which a disc recording medium is removably mounted, the disc mounting unit rotating the disc recording medium; a print head which discharges an ink drop towards a label surface of the disc recording medium that is rotationally driven by the disc mounting unit; and a mist attracting unit which, by applying a voltage, attracts mist of the ink drop discharged from the print head, the mist attracting unit provided near the disc recording medium mounted to the disc mounting unit.

Growing community of inventors

Tokyo, Japan

Shintaro Tanaka