Mitsui Chemicals, Inc.

Murata Manufacturing Co., Ltd.

A School Corporation Kansai University

Nakagawa Special Steel Co., Ltd.

Mitsunobu Yoshida

Kazuhiro Tanimoto

Shigeo Nishikawa

Yoshiro Tajitsu

Masamichi Ando

Katsuki Onishi

Nobuhiro Maruko

Hiroshi Watanabe

Masaki Shimizu

Kenichi Goto

Taizo Nishimoto

Hitoshi Onishi

Kouichi Kanayama

Shunsuke Fujii

Takashi Ono

Yasushi Iwata

Shusaku Takagi

Shoji Tamai

Masanobu Ajioka

Hidekazu Kano

Takashi Kuroki

Masahiko Mitsuzuka

Ichiro Fujio

Shinichi Usugi

Hidenobu Nogi

Takayuki Onogi

Takeharu Isaki

Tomoyuki Nakata

Takeshi Karino

Takehiko Omi

Kunihiro Inada

Masamitsu Tanaka

Katsuo Kono

Tadao Sunahara

Sigeru Bando

Takaharu Isaki

Yoshiaki Aso

Hiroshi Fukuda

The present invention provides: a piezoelectric substrate which includes a first piezoelectric body having an elongated shape and helically wound in one direction, and which does not include a core material, in which the first piezoelectric body includes a helical chiral polymer (A) having an optical activity; in which the length direction of the first piezoelectric body is substantially parallel to the main direction of orientation of the helical chiral polymer (A) included in the first piezoelectric body; and in which the first piezoelectric body has a degree of orientation F, as measured by X-ray diffraction according to the following Equation (a), within the range of 0.5 or more but less than 1.0:degree of orientation=(180&#xb0;&#x2212;&#x3b1;)/180&#xb0;&#x2003;&#x2003;(a)(in which &#x3b1; represents the half-value width of the peak derived from the orientation).

Piezoelectric substrate, piezoelectric woven fabric, piezoelectric knitted fabric, piezoelectric device, force sensor, and actuator

A piezoelectric substrate attachment structure including a press section pressed by contact, a piezoelectric substrate provided adjacent to the press section, and a base section provided adjacent to the piezoelectric substrate on an opposite side from the press section. The following relationship Equation (a) is satisfied:&#x2003;&#x2003;(a)

Piezoelectric substrate attachment structure, sensor module, moving body, and protection body

A piezoelectric substrate attachment structure including a cable-shaped piezoelectric substrate, a press section provided adjacent to the piezoelectric substrate and pressed from an opposite side from the piezoelectric substrate, and a base section provided adjacent to the piezoelectric substrate on an opposite side from the press section. A ratio Eb/Ea of a Young's modulus Eb of the base section to a Young's modulus Ea of the press section being 10or lower.

Piezoelectric substrate attachment structure and sensor module

Provided is a piezoelectric substrate including: an elongate conductor; and an elongate first piezoelectric material helically wound in one direction around the conductor, in which the first piezoelectric material includes an optically active helical chiral polymer (A), the lengthwise direction of the first piezoelectric material and the principal orientation direction of the helical chiral polymer (A) included in the first piezoelectric material are substantially parallel to each other, and the first piezoelectric material has an orientation degree of F. in a range of from 0.5 to less than 1.0, determined from X-ray diffraction measurement by the following Formula (a):orientation degree F.=(180&#xb0;&#x2212;&#x3b1;)/180&#xb0;&#x2003;&#x2003;(a)

Piezoelectric substrate, piezoelectric textile, piezoelectric fabric, piezoelectric device, force sensor, actuator, and biological information acquisition device

A sensor module includes a holding member formed of an elastic body, a pressure bearing face provided at the holding member and configured to bear pressure, an adjoining face provided at the holding member so as to adjoin the pressure bearing face and configured to undergo deformation in accordance with the pressure borne by the pressure bearing face, and an elongate piezoelectric substrate arranged on the adjoining face.

Sensor module containing elongate piezoelectric substrate and pressure distribution sensor provided with the same

A piezoelectric substrate, comprising: a conductor cord that has a core material and a conductor disposed around the core material; and an elongated piezoelectric body that is disposed around the conductor cord in a spiral manner, unidirectionally along an axial direction of the conductor cord, wherein: the piezoelectric body comprises an optically active helical chiral polymer, a lengthwise direction of the piezoelectric body and a main orientation direction of the helical chiral polymer in the piezoelectric body are substantially parallel to each other, the piezoelectric body has an orientation degree F. of from 0.5 to less than 1.0, and the conductor cord satisfies Formula (b): &#x394;D&#x3c;t, wherein &#x394;Dis a maximum value of a difference in height between a division A that is selected from plural divisions and a division B that is adjacent to the division A, and tis a minimum thickness of the piezoelectric body.

Piezoelectric substrate, force sensor, and actuator

Provided is a piezoelectric substrate, containing an elongate piezoelectric body that is helically wound, in which the piezoelectric body includes an optically active polypeptide, a length direction of the piezoelectric body and a main orientation direction of the optically active polypeptide included in the piezoelectric body are substantially parallel to each other, and the piezoelectric body has a degree of orientation F of from 0.50 to less than 1.00, as determined from X-ray diffraction measurement by the following Formula (a):Degree of orientation=(180&#xb0;&#x2212;&#x3b1;)/180&#xb0;&#x2003;&#x2003;(a) in Formula (a), &#x3b1; represents a half width (&#xb0;) of a peak derived from orientation.

Piezoelectric substrate, sensor, actuator, biological information acquisition device, and piezoelectric fiber structure

An electronic device with pressing input function has a substantially rectangular parallelepiped-shaped housing. A display panel with pressure sensor and an arithmetic circuit module are disposed in the housing. The display panel with pressure sensor is composed of a pressure sensor and a display panel. In the display panel, a front polarizing plate is disposed on a front face of a liquid crystal panel. In the pressure sensor, electrodes are formed on both respective flat plate faces of a piezoelectric film having birefringence. The pressure sensor is disposed between the liquid crystal panel and the front polarizing plate of the display panel, and a uniaxial drawing direction of the piezoelectric film is parallel to a polarizing direction of the front polarizing plate.

Display panel with pressure sensor and electronic device with pressing input function

A pressure-sensing device including a pressed component that has a contact surface to which pressure is applied by contact from a presser; a polymeric piezoelectric element that is disposed at an opposite side from the contact surface of the pressed component and that has a piezoelectric constant dof 1 pC/N or more as measured at 25&#xb0; C. using a stress-charge method; a curable resin layer that includes at least one selected from the group consisting of cold-setting resins, thermosetting resins, and actinic radiation-curable resins and that is in contact with at least part of a surface of the polymeric piezoelectric element; and an electrode that is in contact with at least part of a surface of the polymeric piezoelectric element or of a surface of the curable resin layer.

Pressure-sensing device and pressure-sensing touch panel

Provided is a display device containing a crystalline piezoelectric polymer layer having a helical chiral polymer (A) that has a weight average molecular weight of from 50,000 to 1,000,000 and has optical activity, an optical compensation layer satisfying the following expression (1), and a linear polarizer. In expression (1), Xc represents a degree of crystallinity (%) of the crystalline piezoelectric polymer layer obtained by a DSC method; MORc represents a standardized molecular orientation of the crystalline piezoelectric polymer layer measured by a microwave transmission molecular orientation meter when a reference thickness is 50 &#x3bc;m; d represents a thickness (&#x3bc;m) of the crystalline piezoelectric polymer layer; and Rth represents a phase difference (nm) in a thickness direction of the optical compensation layer at a wavelength of 550 nm.|0.06&#xd7;|&#x2264;500&#x2003;&#x2003;Expression (1):

Display device and laminated optical film

The invention provides a pressure detecting device containing a pressurized member having a contact surface that is subjected to pressure due to contact with a pressurizing means; and a piezoelectric member that is arranged facing the pressurized member and that includes a polymeric piezoelectric material having a piezoelectric constant dof 1 pm/V or more as measured by a displacement method at 25&#xb0; C., and a ratio IEb/IEa between a product IEb of a cross-sectional secondary moment Ib and a Young's modulus Eb of the pressurized member, and a product IEa of a cross-sectional secondary moment Ia and a Young's modulus Ea of the piezoelectric member, is in a range of from 10to 10.

Pressure detecting device and touch panel

A piezoelectric device is provided that includes a polymer piezoelectric material having at least one film-like layer; a first electric conductor provided on a principal surface of the polymer piezoelectric material; a second electric conductor provided on a surface of the polymer piezoelectric material at an opposite side from the first electric conductor on the principal surface; a first end surface electric conductor provided on one end surface in a width direction of the polymer piezoelectric material and disposed so as to be conductively connected to the first electric conductor and so as not to be in contact with the second electric conductor; and a second end surface electric conductor provided on any other end surface that is not the one end surface of the polymer piezoelectric material and disposed in a defined manner.

Piezoelectric device and process for producing piezoelectric device

Provided is a process for producing a polymeric piezoelectric material including a first step of heating a sheet in an amorphous state containing the helical chiral polymer to obtain a pre-crystallized sheet, and a second step of stretching the pre-crystallized sheet in biaxial directions, wherein the polymeric piezoelectric material includes a helical chiral polymer having a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, wherein a crystallinity of the material measured by a DSC method is from 20% to 80%, and a product of a standardized molecular orientation MORc measured by a microwave transmission type molecular orientation meter based on a reference thickness of 50 &#x3bc;m and the crystallinity is from 25 to 250.

Polymeric piezoelectric material, and process for producing the same

A polymeric piezoelectric material is provided that includes an aliphatic polyester (A) with a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, and a stabilizing agent (B) with a weight-average molecular weight of from 200 to 60,000 having at least one kind of functional group selected from the group consisting of a carbodiimide group, an epoxy group and an isocyanate group, wherein the crystallinity of the material obtained by a DSC method is from 20% to 80%, a content of the stabilizing agent (B) is from 0.01 part by mass to 10 parts by mass with respect to 100 parts by mass of the aliphatic polyester (A), and internal haze with respect to visible light is 50% or less, as well as a process for producing the same.

Polymeric piezoelectric material and process for producing the same

A touch panel having a piezoelectric sheet with a first region and a second region, and a surface protection film bonded to the second region of the piezoelectric sheet with a non-curable adhesive. The non-curable adhesive has a larger elasticity than a material that bonds the first region of the piezoelectric sheet to the surface protection film.

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Ichihara, Japan

Mitsunobu Yoshida