9 results about "Electrostatic transducer" patented technology

An electrostatic transducer that enables improvement of detection accuracy or driving precision while allowing flexibility is provided. The electrostatic transducer (1) is provided with: an insulator sheet (11); at least one electrode sheet (12) which is laminated on the insulator sheet (11), constitutes a target region to be used as a detection region or a driving region, is formed of an elastomer comprising a conductive filler, and includes at least one terminal part (12b); and at least one bypass conductor (13) which has an electrical resistivity less than that of the electrode sheet (12), is disposed in contact with the electrode sheet (12) along the surface of a part of the electrode sheet (12), and is electrically connected to the electrode sheet (12) in the area in contact with the electrode sheet (12).

The present invention provides an electrostatic converter and a method for manufacturing the electrostatic converter. The electrostatic converter can be applied to various sensors, can obtain a high SN ratio, and can increase the degree of freedom in the configuration and structure of the portion for detecting changes in electrostatic capacitance. The displacement plate (12) has a fixed portion (12a) fixed to the support (11) and a variable portion (12b) provided so as to be variable relative to the fixed portion (12a). The detection unit (13) is mounted in such a manner that at least a part thereof can vary together with the variable portion (12b), and is provided in such a manner that it can detect the variation of the variable portion (12b) as a change in electrostatic capacitance. The detection unit (13) is disposed in a vacuum or low-pressure space (19).

Aspects of the present disclosure relate to an electrostatic speaker system (225), a vehicle audio system (200) including the electrostatic speaker system (225), and a vehicle (300) including the vehicle audio system (200). An electrostatic speaker system (225) includes a voltage conversion module (245) and an electrostatic transducer (230). The voltage conversion module (245) is configured to: receive a low voltage "speaker level" signal (220) from a vehicle audio source (205); and converts the received low voltage loudspeaker level signal (220) into a high voltage audio signal (220a). The electrostatic transducer (230) is configured to receive a high voltage audio signal (from the voltage conversion module) and to convert the high voltage audio signal (220a) into sound waves for output by the electrostatic speaker system (225). The voltage conversion module (245) comprises at least one audio transformer (250) configured to boost a voltage of the low voltage loudspeaker level signal (220) to a predefined voltage level for the high voltage audio signal (220a).

Transducer systems disclosed herein include self-sensing capabilities. In particular, electrostatic transducers include a low voltage electrode and a high voltage electrode. A low voltage sensing unit is coupled with the low voltage electrode of the electrostatic transducer. The low voltage sensing unit is configured to measure a capacitance of the electrostatic transducer, from which displacement of the electrostatic transducer may be calculated. High voltage drive signals received by the high voltage electrode during actuation may be isolated from the low voltage sensing unit. The isolation may be provided by dielectric material of the electrostatic transducer, a voltage suppression component, and / or a voltage suppression module comprising a low impedance ground path. In the event of an electrical failure of the transducer, the low voltage sensing unit may be isolated from high voltages.

Aspects of the present invention relate to an electrostatic speaker system, a vehicle audio system comprising the electrostatic speaker system, and a vehicle comprising the vehicle audio system. The electrostatic speaker system comprises a voltage conversion module and an electrostatic transducer. The voltage conversion module is configured to receive a low-voltage ‘speaker-level’ signal from a vehicle audio source; and to convert the received low-voltage speaker-level signal to a high-voltage audio signal. The electrostatic transducer is configured to receive the high-voltage audio signal (from the voltage conversion module) and to convert this high-voltage audio signal into sound waves for output by the electrostatic speaker system. The voltage conversion module comprises at least one audio transformer configured to step-up the voltage of the low-voltage speaker-level signal to a predefined voltage level for the high-voltage audio signal.

An electrostatic MEMS transducer includes a membrane and an actuator array. The actuator array includes a plurality of vertical parallel-plate actuator cells. Each vertical actuator cell comprises two silicon electrodes and a polysilicon electrode positioned between the two silicon electrodes. The actuator cells are configured to generate oscillation of the membrane responsive to an electrical signal.

High strain hydraulically amplified self-healing electrostatic transducers having increased maximum theoretical and practical strains are disclosed. In particular, the actuators include electrode configurations having a zipping front created by the attraction of the electrodes that is configured orthogonally to a strain axis along which the actuators. This configuration produces increased strains. In turn, various form factors for the actuator configuration are presented including an artificial circular muscle and a strain amplifying pulley system. Other actuator configurations are contemplated that include independent and opposed electrode pairs to create cyclic activation, hybrid electrode configurations, and use of strain limiting layers for controlled deflection of the actuator.

The electrostatic speaker 210 is configured to be disposed within a vehicle interior component. The electrostatic speaker comprises an electrostatic transducer 220 and a speaker grille 230 configured

The electrostatic transducer (1) comprises: an insulator sheet (11); a first electrode sheet (12); a lead wire (30); a first bonding portion (61) electrically bonding the first electrode sheet (12) and the core wire (30a) of the lead wire (30) in a first region (Pa) where the first electrode sheet (12) and the core wire (30a) of the lead wire (30) overlap; and a second bonding portion (62) bonding the insulator sheet (11) and the covering portion (30b) of the lead wire (30) in a second region (Pb) where the insulator sheet (11) and the covering portion (30b) of the lead wire (30) overlap.