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:
Sep. 27, 2016
Filed:
Nov. 20, 2013
Applicant:
3-o Lab Co. Ltd., Hsinchu, TW;
Inventors:
Assignee:
3-O LAB CO. LTD., Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 25/00 (2006.01); H04R 19/00 (2006.01); H04R 19/01 (2006.01); H04R 19/02 (2006.01);
U.S. Cl.
CPC ...
H04R 19/005 (2013.01); H04R 19/00 (2013.01); H04R 19/01 (2013.01); H04R 19/02 (2013.01); H04R 2217/00 (2013.01); H04R 2217/01 (2013.01); H04R 2217/03 (2013.01);
Abstract
An electrostatic electroacoustic transducer includes a first structure, a second structure and a third electrode. The third electrode is located between the first structure and the second structure. The first structure includes a first driving element, a first spacer and a first diaphragm, and the second structure includes a second driving element, a second spacer and a second diaphragm. By providing an alternating voltage source, a transformer and a bias voltage, the electrostatic electroacoustic transducer with a dual-diaphragm structure has a high efficiency and an enlarged range of audio frequency.