4results about "Device details" patented technology

A piezoelectric device includes a connection section including a first coupling portion, a second coupling portion, and a bridging portion. The first coupling portion extends along a slit and is connected to one of a pair of beam sections. The second coupling portion extends along the slit and is connected to another of the pair of beam sections. The bridging portion is located between the slit and an opening and is connected to both of the first coupling portion and the second coupling portion. The beam sections are connected to each other in a circumferential direction of a base having an annular shape via the connecting section while each of the beam sections is interposed between the slits extending in intersecting directions.

An actuator includes an actuator body that includes a first surface and a second surface that face each other, a first constraining member that is provided on the first surface, and constrains the first surface from expanding and contracting, and a second constraining member that is provided on the second surface, and constrains the second surface from expanding and contracting. The actuator body includes a first electrode, a second electrode that faces the first electrode, and an elastomer layer that is provided between the first electrode and the second electrode. The first electrode is a pattern electrode. The first constraining member and the second constraining member are provided correspondingly to the first electrode.

An audio speaker system includes: an amplifier, where a positive input terminal of the amplifier is configured to be coupled to a first reference voltage node; and a piezo diaphragm including: a metal plate; a first piezo film attached to the metal plate, where the first piezo film is configured to function as a speaker during operation of the audio speaker system; and a second piezo film attached to the metal plate and spaced apart from the first piezo film, where the second piezo film is configured to function as a microphone during operation of the audio speaker system, where an output terminal of the amplifier is coupled to the first piezo film, and where a negative input terminal of the amplifier is coupled to the second piezo film.

[Object] To provide a technology such as a piezoelectric coil having higher energy conversion efficiency.[Solving Means] A piezoelectric coil according to the present technology includes a coil-like core material and a plurality of band-like piezoelectric materials. The plurality of piezoelectric materials is helically wound around the core material so as to be alternately arranged along the core material.