Flexible and transparent thermotropic sounding apparatus

Abstract

The invention, which belongs to the sounding apparatus technology field, relates to a flexible and transparent thermotropic sounding apparatus. The apparatus comprises a sound element and a signal input device connected with the sound element. The sound element includes a flexible and transparent substrate; and at least one conductive film structure and a pair of electrodes or multi-pair electrodes are arranged on the substrate, wherein one ends of the pair of electrodes or the multi-pair electrodes are connected at two sides of the conductive film structure. And an input terminal of the signal input device is connected with the other ends of the electrodes. Therefore, the conductive film structure changes density of surrounding mediums to emit sound waves. According to the invention, there is no mechanical oscillation on the sound element itself and the sound element is transparent and can be bent and stretched. The thermotropic sounding apparatus can generate high sound pressure output within a frequency range of from 101 kHz to 100 MHz as well as has advantages of high reliability, flexibility, transparency, low cost, and high performance; besides, the apparatus can be integrated with a display screen and simultaneously enables sounding and display functions to be realized. Therefore, the provided apparatus can be widely applied to electronic fields like a mobile phone, a MP3, a MP4, a television, a computer, ultrasonic imaging, and a range finding system and the like.

Description

Technical field [0001] The invention belongs to the technical field of thermoacoustic devices, and particularly relates to a structure design of a flexible and transparent thermoacoustic device based on the thermoacoustic effect. Background technique [0002] The sound device is generally composed of a sound element and a signal input device. By adding an electrical excitation signal to drive the sound device, the sound device emits a corresponding sound. The sound element in the prior art is generally a speaker, which is an electro-acoustic device that converts an electric signal into a sound signal. There are many types of existing speakers, which can be divided into electromagnetic, electrostatic, electromotive and piezoelectric according to their working principles. Although these traditional speakers have different working principles, they generally produce their own mechanical vibration, which affects the nearby air to produce fluctuations, and then realizes the process of...

AI Technical Summary

Problems solved by technology

Therefore, the occurrence frequency of this sounding element 12 was relatively narrow at that time, and the sounding intensity was low, resulting in no practical application for a long time

Images