Sharp Kabushiki Kaisha Corporation

Kenji Komiya

Hiroshi Iwata

Akihide Shibata

Masaru Nomura

Yoshiji Ohta

Yoshifumi Yaoi

Akira Takahashi

Tetsu Negishi

Takeshi Shiomi

Kohtaroh Kataoka

Shuji Wakaiki

David P Stumbo

Erik Freer

Kenji Kimoto

James M Hamilton

Satoshi Morishita

Kohichiroh Adachi

Fumiyoshi Yoshioka

Hiroshi Igarashi

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

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 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.

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

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

Methods, systems, and apparatuses for nanowire deposition are provided. A deposition system includes an enclosed flow channel, an inlet port, and an electrical signal source. The inlet port provides a suspension that includes nanowires into the channel. The electrical signal source is coupled to an electrode pair in the channel to generate an electric field to associate at least one nanowire from the suspension with the electrode pair. The deposition system may include various further features, including being configured to receive multiple solution types, having various electrode geometries, having a rotatable flow channel, having additional electrical conductors, and further aspects.

Methods and systems for electric field deposition of nanowires and other devices

A metal lineis formed in a linear area S of an insulative substrate, and moreover a metal lineis formed generally parallel to the metal linewith a specified distance thereto. The metal lineis connected to an n-type semiconductor coreof bar-like structure light-emitting elementsA toD, and the metal lineis connected to a p-type semiconductor layer. By dividing the insulative substrateinto a plurality of divisional substrates, a plurality of light-emitting devices in each of which a plurality of bar-like structure light-emitting elementsare placed on the divisional substrates are formed.

Light-emitting device manufacturing method, light-emitting device, lighting device, backlight, liquid-crystal panel, display device, display device manufacturing method, display device drive method and liquid-crystal display device

In order to offer a power supply circuit that can minimize the drop in efficiency by reducing losses during voltage conversion, in an improved-power factor circuit, a control circuit performs a step-up operation in which a control signal for turning on a first switching element (Tr) and switching a second switching element (Tr) is output, and a step-down operation in which a control signal for turning off the second switching element (Tr) and switching the first switching element (Tr) is output.

Illumination apparatus and power supply circuit

In a light emitting device, one hundred or more bar-like structured light emitting elements () each having a light emitting area of 2,500&#x3c0; &#x3bc;mor less are placed on a mounting surface of one insulating substrate (), so that the light emitting device fulfills little variation in luminance, long life, and high efficiency by dispersion of light emission with suppression of increase in temperatures in light emitting operations.

Light emitting device, method for manufacturing light emitting device, illuminating device, and backlight

A light-emitting element includes a first conductivity type semiconductor base, a plurality of first conductivity type protrusion-shaped semiconductors formed on the semiconductor base, and a second conductivity type semiconductor layer that covers the protrusion-shaped semiconductors.

Light emitting element and production method for same, production method for light-emitting device, illumination device, backlight, display device, and diode

This method for disposing fine objects, in a substrate preparing step, prepares a substrate having specified positions where fine objects () are to be disposed in an area where a first electrode () and a second electrode () face each other, and in a fluid introducing step, a fluid () is introduced on the substrate (). The fluid () contains a plurality of the fine objects (). The fine objects () are diode elements, each of which has, as an alignment structure, a front side layer () composed of a dielectric material, and a rear side layer () composed of a semiconductor. In the fine object disposing step, by applying an AC voltage to between the first electrode () and the second electrode (), the fine objects () are disposed by dielectrophoresis with the front side layer () facing up at the predetermined positions in the area (A) where the first electrode () and the second electrode () face each other.

Method for disposing fine objects, apparatus for arranging fine objects, illuminating apparatus and display apparatus

A push-pull circuit comprising: a push-pull first switching element and second switching element; a first rectifier element; a third switching element for switching a pathway between conductance and cutoff, the pathway leading from a connection point between the first switching element and an inductive load via the first rectifier element to a connection point between a DC power source and a center tap of the inductive load; a second rectifier element; and a fourth switching element for switching a pathway between conductance and cutoff, the pathway leading from a connection point between the second switching element and the inductive load via the second rectifier element to a connection point between the DC power source and the center tap of the inductive load.

Push-pull circuit, DC/DC converter, solar charging system, and movable body

A vehicle driving device is arranged such that in accordance with an instruction signal from the outside, a first battery managing section outputs, to the outside, a signal related to charging/discharging control for a first battery.

Vehicle driving device, vehicle charging system, and automobile

This DC/DC converter includes a first DC/DC converter, and a second DC/DC converter for carrying out a DC/DC conversion of voltage supplied from the first DC/DC converter. One of either the first DC/DC converter or the second DC/DC converter is a fixed-factor DC/DC converter, and the other of either the first DC/DC converter or the second DC/DC converter is a variable-factor DC/DC converter.

DC-DC converter, solar charging system, and movable body

To facilitate electrode connections and achieve a high light emitting efficiency, a rod-like light-emitting device includes a semiconductor core of a first conductivity type having a rod shape, and a semiconductor layer of a second conductivity type formed to cover the semiconductor core. The outer peripheral surface of part of the semiconductor core is exposed.

Growing community of inventors

Osaka, Japan

Kenji Komiya