Sony Corporation

Dexerials Corporation

Taiyo Yuden Co., Ltd.

Masayoshi Kanno

Norio Saito

Katsuhisa Orihara

Shinichiro Yamada

Kazutaka Habu

Noritaka Sato

Makoto Watanabe

Hiroyuki Ryoson

Akihiro Fukuda

Toshiaki Yokota

Tsutomu Noguchi

Takeshi Horie

Seiichiro Tabata

Masakazu Yajima

Toshihide Hayashi

Satoru Sugita

Shin Masuhara

Manabu Suzuki

Ikuo Kanayama

Hiroyuki Mori

Masato Hattori

Masataka Shinoda

Akitoshi Suzuki

Masahiro Kobo

Atsushi Fukumoto

Hiroshi Nakayama

Sohmei Endoh

Masayuki Nagamine

Tomiji Tanaka

Masahiko Kaneko

Masatsugu Suwabe

Katsuhiko Ohtomo

Shinobu Tsurumaru

Kentaro Morito

Ritsuko Inoue

Yasuhiro Hideshima

Naoko Takeda

Kazuki Satake

Somei Endo

Manabu Iwai

Miho Kamiyama

Shunichi Fujishima

Mariko Okumura

A sheet-shaped member is provided and includes a porous carbon material including a material obtained from carbonization of a raw material including rice husk, the raw material having a silicon content of at least 5 wt %, the raw material is heat treated before carbonization, and the raw material is treated by an alkali treatment after carbonization to reduce the silicon content, the porous carbon material having a specific surface area of at least 10 m2/g as measured by the nitrogen BET method, a pore volume of at least 0.1 cm3/g as measured by the BJH method and MP method, and an R value of 1.5 or greater, wherein the porous carbon material includes mesopores having pore sizes from 2 nm to 50 nm and obtained from the alkali treatment of the raw material after carbonization, the porous carbon material further includes macropores and micropores, the R value is expressed as R=B/A, the A referring to an intensity at an intersection between the baseline of a diffraction peak of the (002) plane as obtained based on powdery X-ray diffractometry of the porous carbon material and a perpendicular line downwardly drawn from the diffraction peak of the (002) plane, and the B referring to the intensity of the diffraction peak of the (002) plane.

Sheet-shaped member

A carbon-polymer complex is provided and includes a porous carbon material and a binder, wherein the porous carbon material includes a material obtained from carbonization of a raw material including rice husk, the raw material having a silicon content of at least 5 wt %, the raw material is heat treated before carbonization, and the raw material is treated by an alkali treatment after carbonization to reduce the silicon content, the porous carbon material having a specific surface area of at least 10 m/g as measured by the nitrogen BET method, a pore volume of at least 0.1 cm/g as measured by the BJH method and MP method, and an R value of 1.5 or greater, wherein the porous carbon material includes mesopores having pore sizes from 2 nm to 50 nm and obtained from the alkali treatment of the raw material after carbonization, the porous carbon material further includes macropores and micropores.

Carbon-polymer complex

A porous carbon material is provided. The porous carbon material having a value of specific surface area of at least 10 m2/g as measured by a nitrogen BET method, a pore volume of at least 0.1 cm3/g as measured by a BJH method and a MP method, and a R value of 1.5 or greater, wherein the R value is expressed as R=B/A, wherein A is an intensity at an intersection between a baseline of a diffraction peak of a (002) plane as obtained based on powdery X-ray diffractometry of the porous carbon material and a perpendicular line downwardly drawn from the diffraction peak of the (002) plane, and wherein B is an intensity of the diffraction peak of the (002) plane.

Porous Carbon Material

By a process for producing a porous carbon material from a plant-derived material as a raw material, said process including carbonizing the plant-derived material at 800&#xb0; C. to 1,400&#xb0; C. and then applying a treatment with an acid or alkali, a porous carbon material having a value of specific surface area of at least 10 m/g as measured by the nitrogen BET method, a silicon content of at most 1 wt % and a pore volume of at least 0.1 cm/g is obtainable from a plant-derived material, which has a silicon content of at least 10 wt %, as a raw material. Also provided is a process for producing a porous carbon material equipped with excellent functionality so that the porous carbon material can be used, for example, as an anode material for batteries, an adsorbent, masks, adsorbing sheets, or carriers.

Porous carbon materials and production process thereof, and adsorbents, masks, adsorbing sheets and carriers

An antenna device incorporated in an electronic apparatus to communicate with an external apparatus via an electromagnetic field signal includes a first conductor provided inside a housing of the electronic apparatus and opposing the external apparatus, a loop antenna having an antenna coil conductively coupled to the external apparatus and coiling thereon, a sheet-like second conductor provided as being spaced with a predetermined space from the first conductor and partially overlapping or making contact with a surface of the loop antenna opposite to a surface opposing the external apparatus, and a sheet-like third conductor provided between the first conductor and the second conductor and having one end overlapping or making contact with the first conductor and other end partially overlapping or making contact with the second conductor.

Antenna device and electronic apparatus

A non-contact communication apparatusincludes an antenna resonant unitand an antenna drive unit. In the antenna drive unit, for example, a measurement unit consisting of an differential amplifier Ameasures an output current from an oscillation unit. A control unitdetects a minimum value or maximum value of the output current. The resonant frequency is controlled by the use of an optimal control value corresponding to the minimum value or maximum value. Therefore, even if the resonant frequency fluctuates due to variations in antenna characteristics in manufacture or a usage environment or aging, satisfactory communication characteristics at a set resonant frequency can be obtained.

Non-contact communication apparatus, antenna circuit, antenna drive apparatus, non-contact feeding apparatus, electronic device, tuning method, discovery method, and programs for achieving those methods

An electronic device and an antenna device are provided that use a coil module which is thinned without losing the characteristics of the coil module and which can be mounted in a narrowed space. A coil module including a loop-shaped antenna coil wounded in a planar shape and a sheet-shaped magnetic sheet which is formed of a magnetic material and which overlaps with at least a part of the antenna coil is included. In the coil module, a part of the antenna coil is overlapped with an internal structure of a housing and the magnetic sheet is provided in a position that does not overlap with the internal structure on an antenna coil surface side that overlaps with the internal structure.

Electronic device and antenna device

The present provides a variable capacitance element enabling a further reduction in capacitance variation among variable capacitance elements, and provides a packaged circuit including the variable capacitance element. A variable capacitance element is configured to include an element body unit, a compensation unit, a first external terminal for signals, a second external terminal for signals, external terminals for control, and external terminals for capacitance compensation. The compensation unit has second variable-capacitance capacitor units Cto C, each including a second dielectric layer formed of a ferroelectric material, and is connected to the element body unit, and has a capacitance varying according to a control voltage signal.

Variable capacitance element, packaged circuit, resonant circuit, communication apparatus, communication system, wireless charging system, power supply apparatus, and electronic apparatus

The present invention achieves a proper balance among multiple constituent bias resistors of a variable-capacitance circuit by using different resistance values for resistors located at specific positions and the other resistors, thereby reducing a response time while sufficiently blocking an alternating-current component. This variable-capacitance circuit is a variable-capacitance circuit for which variable-capacitance components (C-C), the capacitances of which change in accordance with a control voltage, are connected in series between terminals to which an alternating-current signal is applied, and multiple bias application paths for applying a bias voltage to each of the variable-capacitance components via resistance components (R-R) are formed, wherein, among resistance components (R-R), resistance components (R, R) connected to the terminals, to which the alternating current is applied, have different resistance values from the resistance values of the other resistance components (R-R).

Variable capacitance circuit, variable capacitance device, and resonance circuit and communication apparatus using the same

Provided is a reception device () including: an antenna section () that includes a resonant circuit () including an antenna () that is configured to receive electrical power from a transmission device () through contactless communication; and a control section () that is configured to change a Q factor of the resonant circuit () and control an antenna characteristic of the antenna section () in accordance with a change in received electrical power before and after changing of the Q factor.

Reception device and control method therefor

A control device according to the present invention is provided with (A) a variable capacitance device including a variable capacitance element, and (B) a control unit configured to apply a control voltage with a first polarity to the variable capacitance device during a third period including a first period to perform communication using the variable capacitance device and a second period not to perform communication before the first period, and configured to apply a control voltage with a second polarity opposite to the first polarity to the variable capacitance device during a sixth period including a fourth period to perform communication and a fifth period not to perform communication before the fourth period.

Control device for variable capacitance device and communication device including said control device

In order to reduce device size and costs, an antenna device incorporated into an electronic apparatus is provided with an antenna substrate including an antenna coil portion having an antenna coil formed therein, a component portion, and a bending portion arranged along the X-direction, the bending portion being sandwiched between the antenna coil portion and the component portion, wherein on each of the front surface and the back surface of the component portion, an I/O interface for connecting electrically to the body of the electronic apparatus is provided. The antenna substrate is bendable at the bending portion.

Antenna device, electronic apparatus, and method of mounting antenna device

A control circuit, resonant circuit, electronic device, control method, control program, and a semiconductor element, which enable a circuit to be measured and tuned within a short time even in consideration of a time constant when a control voltage is applied to a variable capacitance capacitor. A control circuit for a variable capacitance capacitor includes: a digital-analog converter that outputs a control voltage consisting of a variable DC voltage; the variable capacitance capacitor that has a capacitance varying with an application of the control voltage; a phase detector that acquires a characteristic of a circuit containing the variable capacitance capacitor; an analog-digital converter that subjects an analog signal from the phase detector to a digital conversion; a comparing section that compares a target value with a detected value; and a control section that sets the control voltage for the digital-analog converter on the basis of the comparison result.

Control circuit, resonance circuit, electronic device, control method, control program, and semiconductor element

Provides is a variable capacitance circuit that is capable of efficiency optimizing antenna transmission effectively by regulating capacitance values of variable capacitance capacitors with use of direct current voltages applied to the variable capacitance capacitors. A variable capacitance circuit () includes a series variable capacitance element () and a parallel variable capacitance element () connected in series with the series variable capacitance element (). The series variable capacitance element () includes two variable capacitance capacitors (CS, CS) () connected in series. The parallel variable capacitance element () includes two variable capacitance capacitors (CP, CP) () connected in series and a variable capacitance capacitor (CP)() connected in parallel with the variable capacitance capacitors (CP, CP) (). The variable capacitance circuit () further includes three direct current terminals ().

Variable capacitance circuit, variable capacitance device, resonant circuit, amplifying circuit, and electronic apparatus

Provided is a power-receiving device according to at least one embodiment includes: a transmission/reception unit () including a resonant circuit having an antenna () configured to receive a power transmitted from a contactless charging device () and to transmit and receive data to and from the contactless charging device (); a charge control unit () configured to perform power source control; and a control unit () configured to generate control state data indicating a charging state of the secondary cell () and/or a power source state of an apparatus main unit () operated with the secondary cell () and to transmit the control state data to the contactless charging device (). The control unit () has a power-receiving mode in which normal power supply is performed and a regulation mode in which the received power is regulated by regulating a resonant frequency of the resonant circuit.

Power-receiving device, receiving power regulation method, and semiconductor device

Growing community of inventors

Kanagawa, Japan

Masayoshi Kanno