The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 2013
Filed:
Jul. 12, 2007
Dar-ming Chiang, Hsinchu, TW;
Yan-ren Chen, Daya Township, TW;
Long-cheng Cheng, Hsinchu, TW;
I-chen Lee, Jhubei, TW;
Dar-Ming Chiang, Hsinchu, TW;
Yan-Ren Chen, Daya Township, TW;
Long-Cheng Cheng, Hsinchu, TW;
I-Chen Lee, Jhubei, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An electrostatic electroacoustic device comprising a first electrode configured to receive an audio signal, a second electrode configured to receive the audio signal, a first electret between the first electrode and the second electrode, the first electret including at least one dielectric layer containing electrostatic charges, a second electret between the first electrode and the second electrode, the second electret including at least one dielectric layer containing electrostatic charges, and a conductive layer sandwiched between the first electret and the second electret, the conductive layer, the first electret and the second electret being capable of vibratory motion relative to the first electrode and the second electrode based on the audio signal.