Patent ID: 8831253
Filing Date: 2014-09-09
Classification: H04R

Abstract:
1. An electroacoustic apparatus, comprising: a flat speaker, disposed on a first side surface of the electroacoustic apparatus, comprising a metal electrode with a plurality of holes and an electret vibrating film structure, wherein a chamber is formed between the metal electrode and the electret vibrating film structure, and a sympathetic vibration is generated in the chamber to make a sound through interaction between the metal electrode and the electret vibrating film structure; an optical energy converter, flatly disposed on a second side surface of the electroacoustic apparatus, for converting a light beam into an electrical power; and a signal generator, coupled to the optical energy converter and the flat speaker, for receiving a signal from a sound source and generating a corresponding sound signal according to the received signal for driving the flat speaker by using the electrical power, wherein the flat speaker further comprises a plurality of supporting members disposed in the chamber between the metal electrode and the electret vibrating film structure, wherein the electret vibrating film structure includes an electret film layer and a metal thin film electrode, and the sound signals generated by the signal generator are respectively input into the metal electrode and the metal thin film electrode, the electret film layer drives the metal thin film electrode to vibrate together according to the sound signals, wherein the plurality of supporting members arranged in a pre-defined pattern between the metal electrode and the electret film layer of the electret vibrating film structure enhances the sympathetic vibration generated through the interaction between the metal electrode and the electret vibrating film structure.