Sharp Kabushiki Kaisha Corporation

West Electric Co., Ltd.

Nanosys, Inc.

Other

Matsushita Electric Industrial Co., Ltd.

Nara Institute of Science and Technology

Hiroshi Iwata

Akihide Shibata

Masaru Nawaki

Yoshinao Morikawa

Yoshifumi Yaoi

Seizo Kakimoto

Masayuki Nakano

Katsuji Ishikawa

Takeshi Shiomi

Kenji Komiya

Yoshiji Ohta

Masaru Nomura

Tsunemi Yoshino

Tetsuo Yamaoka

Kohtaroh Kataoka

Yasuaki Iwase

Toshimasa Matsuoka

Akitoshi Morioka

Nobutoshi Arai

Shuji Wakaiki

Toshitsugu Kashihara

Seizou Kakimoto

Kouichiro Adachi

Takayuki Ogura

Tetsu Negishi

Akira Takahashi

Nobuaki Matsuoka

Kohichiroh Adachi

Kouichirou Adachi

Kei Tokui

Masatomi Harada

Shigeki Hayashida

Koji Hamaguchi

Kotaro Kataoka

Satoshi Morishita

Katsumasa Fujii

Hiroshi Makino

Wataru Hasegawa

Hiroki Igarashi

Fumiyoshi Yoshioka

J Wallace Parce

Paul John Schuele

David P Stumbo

Xiangfeng Duan

Hiroshi Ohki

Francisco A Leon

Jeffrey L Miller

James M Hamilton

Hajime Mitsui

Samuel Edward Martin

Narihiro Morosawa

Cheri X Y Pereira

Yasunobu Okada

Satoru Misaki

Kotaro Hatada

Youichi Iwai

Takuya Sato

Nobuo Yamashita

Katsuhiko Kishimoto

Akira Sakai

Koji Takahashi

Yutaka Takafuji

Osamu Kawasaki

Kenichi Tanaka

Nobuaki Teraguchi

Kenji Kimoto

Shinji Hirata

Shinichi Handa

Takashi Fukushima

Tomohisa Okuno

Keiji Watanabe

Kozo Hoshino

Masaru Higuchi

Michiko Inoue

Kohji Hamaguchi

Kazuou Murata

Yu Tsuzuki

Satoshi Ohtake

Youichi Daimaru

Kohichiro Adachi

Yukio Yasuda

Shigeaki Zaima

Hiroshi Igarashi

Masayuki Lm Narayasuraginomichi 201 Nakano

A nanofiber sensor includes a plurality of pairs of electrodes and nanofibers respectively bridging the gaps between the electrodes in the pair, between the electrodes in the pair, and between the electrodes in the pair. At least two pairs of electrodes of the plurality of pairs of electrodes are different from each other in structures.

Nanofiber sensor

A power supply includes a primary circuit connected to a primary winding of a transformer and a secondary circuit connected to a secondary winding of the transformer. The primary circuit includes MOSFETs, and the secondary circuit includes MOSFETs configured to rectify power transmitted from a primary side of the transformer and includes a capacitor configured to store the rectified power. The secondary circuit performs a discharge operation of discharging the capacitor and causing a current to flow into the secondary winding of the transformer to reduce a source-drain voltage of the MOSFETs before the MOSFETs are switched from an off state to an on state. Thus, the power supply having a high power-conversion efficiency even during low output is provided.

Power supply and power supply unit

A DC-DC converter includes a transformer, a switching circuit provided on the primary side of the transformer, and a rectifier circuit provided on the secondary side of the transformer. The rectifier circuit includes a first rectifier part that is serially connected body of a first transistor and a second transistor having a first electrode connected to a second electrode of the first transistor. The first and second transistors each include a parasitic diode connected forward between the second and first electrode, and the withstanding voltage between the first and second electrodes of the first transistor is higher than the withstanding voltage between the first and second electrodes of the second transistor.

DC-DC converter, and solar power controller and mobile body using same

A scan asynchronous memory element includes: an asynchronous memory element configured to receive an n-input; and a scan control logic circuit configured to generate an n-bit signal input and the n-input to the asynchronous memory element from a scan input. The scan control logic circuit outputs the signal input when a control signal supplied to the scan control logic circuit has a first bit pattern, the scan control logic circuit outputs the scan input when the control signal has a second bit pattern, and the scan control logic circuit outputs a bit pattern allowing the asynchronous memory element to hold a previous value when the control signal has a bit pattern other than the first and second bit patterns.

Asynchronous memory element for scanning

A configuration of a display device capable of color display is obtained. The display device includes a plurality of rod-shaped light-emitting elements each of which includes a semiconductor and which emit light beams having wavelength distributions different from each other, and alignment electrodes (). The alignment electrodes () include a first electrode pair (), a second electrode pair (), and a third electrode pair (). The plurality of rod-shaped light-emitting elements include a first rod-shaped light-emitting element, which is arranged so that one end of the first rod-shaped light-emitting element is adjacent to one electrode of the first electrode pair while the other end is adjacent to the other electrode of the first electrode pair, a second rod-shaped light-emitting element, which is arranged so that one end of the second rod-shaped light-emitting element is adjacent to one electrode of the second electrode pair while the other end of the second rod-shaped light-emitting element is adjacent to the other electrode of the second electrode pair, and a third rod-shaped light-emitting element, which is arranged so that one end of the third rod-shaped light-emitting element is adjacent to one electrode of the third electrode pair while the other end of the third rod-shaped light-emitting element is adjacent to the other electrode of the third electrode pair. Lengths Rto Rof the first to third rod-shaped light-emitting elements and distances dto dof the first to third electrode pairs () to () satisfy the following relationships. d&#x2264;R&#x3c;d, d&#x2264;R&#x3c;d, d&#x2264;R.

Display device and method of producing display device

A high-withstand-voltage normally-on transistor and a low-withstand-voltage normally-off transistor are connected in series, and diodes are provided in reverse parallel to the transistor. A gate terminal of the transistor is connected to a source terminal of the transistor, and a gate driving circuit that outputs a control signal to a gate terminal of the transistor is provided. Forward voltage of the diode is made lower than forward voltage of the diode, and an inductance component of a path connecting nodes via the diode is made greater than an inductance component of a path connecting the nodes via the diode. Accordingly, a switching circuit which includes transistors connected in series and in which transient current at a time of turning off is reduced is provided.

Switching circuit including serially connected transistors for reducing transient current at time of turning off, and power supply circuit provided therewith

The switching power supply device is provided with a high-withstand voltage first transistor, a first electrode of which being connected to a first node; a low-withstand voltage second transistor, a first electrode of which being connected to a second electrode of the first transistor, and a second electrode of which being connected to a second node; and a drive circuit. Each of the first and second transistors has a parasitic diode connected in the forward direction between the second and first electrodes. The drive circuit, in a case where electrical current is to flow from the first node to the second node, turns on the first and second transistors, and, in a case where electrical current is to flow from the second node to the first node, turns on the first transistor, and turns off the second transistor.

Switching power supply device, and inverter, converter, air conditioner, solar power controller, and automobile employing same

A power factor correction circuit includes: a coil and MOSFETs that boost an input voltage to generate a boosted voltage; a first capacitor having one end connected to a first output terminal, and the other end connected to an intermediate node; and a second capacitor having one end connected to the intermediate node, and the other end connected to a second output terminal. In a first operation mode, the boosted vol tage is applied to the two ends of the first capacitor when a positive voltage is input, and applied to the two ends of the second capacitor when a negative voltage is input. In a second operation mode, the boosted voltage is applied to two ends of the first and second capacitors connected in series. Thus, there is provided a power factor correction circuit which has a high efficiency and is compatible with an input voltage in a broad range.

Power factor correction circuit and power supply device

A boost circuit includes multiple switching circuits connected in parallel. Each switching circuit includes first through third transistors and a resistor. The first transistor, the resistor, and the second transistor are serially connected between first and second nodes. The third transistor is connected between the source of the first transistor and the second node. A conductance Gm (S) of the second transistor and a resistance r (&#x3a9;) of the resistor are respectively configured to be within ranges of 1&#x2266;Gm&#x2266;1000 and 7&#xd7;Gm&#x2266;r&#x2266;170&#xd7;Gm. Since the first transistor having a high breakdown voltage is turned on by turning on the second transistor, variations in turn-on time of the boost circuit are reduced.

Semiconductor device, and inverter, converter and power conversion device employing the same

A solar energy utilization system includes a solar panel, a motor driven by an inverter circuit functioning as a motor drive circuit with power output by the solar panel, a solar output voltage monitor functioning as a monitor that monitors an input or an output of the solar panel and also functioning as a monitor that monitors an input or an output of the inverter circuit, and a controller. The controller has a control mode in which the inverter circuit is controlled such that an output voltage of the solar panel is maintained at a voltage higher than a maximum power point voltage. In this control mode, the controller performs the control such that a rotation speed of the motor is changed repeatedly at predetermined timings.

Solar energy utilization system

A control circuit is driven by a driving voltage (V) generated by a generator circuit, and outputs a control signal. A drive circuit is driven by a driving voltage (V) generated by another generator circuit, and turns a switching element inside a switching circuit on or off by supplying, to the switching circuit, a drive signal based on the control signal. During activation of a switching device, a voltage generation controller detects a voltage value of the output voltage (V) of the generator circuit, and allows activation of the other generator circuit after verifying that the detected voltage value is at or above a designated threshold.

Switching device

A highly efficient and low-cost switching power supply device includes a high withstand voltage transistor and a low withstand voltage transistor. When current flows from a second node to a first node, the high withstand voltage transistor turns on and the low withstand voltage transistor turns off, causing current to flow through a built-in diode of the low withstand voltage transistor. Since current does not flow through the parasitic diode of the high withstand voltage transistor, the recovery current is reduced. Furthermore, since a first delay circuit including resistors and a diode is connected to the gate electrode of the high withstand voltage transistor, and a second delay circuit including resistors and a diode is connected to the gate electrode of the low withstand voltage transistor, precise adjustment of the switching speed during switching operation is possible, and losses are reduced.

Switching power supply device, and inverter, converter, and solar power controller including same

A semiconductor device includes a high breakdown voltage, high Gm first transistor and a low breakdown voltage, low Gm second transistor connected in series between first and second nodes, and a low breakdown voltage, high Gm third transistor connected to the second transistor in parallel. When the second transistor is turned on, the first transistor turns on, and furthermore, when the third transistor is turned on, an electrically conducting state is established between the first and second nodes. The second, low breakdown voltage transistor is turned on to turn on the first, high breakdown voltage transistor, and a turn-on time with only limited variation can be achieved.

An in-vehicle solar system that supplies electric energy from a solar battery module to an electric device such as a secondary battery, a load, and the like includes a capacitor that accumulates electric energy from the solar battery module and supplies the accumulated electric energy to the electric device.

Electric system and vehicle

Disclosed is a photovoltaic deviceincluding a plurality of cluster power generation sections G (G, G, G, and G). Each cluster power generation section G includes unitary power generation sections D (D, D) connected in series via connection points CP. The cluster power generation sections G each have at least a predetermined one of the connection points CPdesignated as a specific connection point SP. The specific connection points SPare connected together to link the cluster power generation sections G.

Photovoltaic device, photovoltaic system, and vehicle including photovoltaic device

Growing community of inventors

Nara, Japan

Hiroshi Iwata