Patent ID: 8588438
Filing Date: 2013-11-19
Classification: H04R

Abstract:
1. A driving interface device of a flat speaker, comprising: an impedance component, for receiving a sound signal, and converting the sound signal into a first voltage signal; and a transformer, coupled to the impedance component, for receiving the first voltage signal and converting the first voltage signal into a second voltage signal, wherein a level of the second voltage signal is higher than that of the first voltage signal, and the second voltage signal drives the flat speaker to produce sounds, wherein the flat speaker comprises: a porous electrode; and an electret vibrating film, wherein the porous electrode and the electret vibrating film are interacted in response to the second voltage signal, so that the electret vibrating film is vibrated to produce corresponding sounds; and a plurality of first supporting members disposed between the porous electrode and the electret vibrating film, wherein working areas of the vibrating film are formed between any adjacent two of the plurality of the first supporting members.