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:
Jun. 13, 2017
Filed:
Apr. 06, 2015
Apple Inc., Cupertino, CA (US);
Christopher Wilk, Los Gatos, CA (US);
Alexander V. Salvatti, Morgan Hill, CA (US);
Thomas M. Jensen, San Francisco, CA (US);
Scott P. Porter, San Jose, CA (US);
Ruchir M. Dave, San Jose, CA (US);
Andrew P. Bright, San Francisco, CA (US);
Roderick B. Hogan, San Francisco, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A micro speaker having a capacitive sensor to sense a motion of a speaker diaphragm, is disclosed. More particularly, embodiments of the micro speaker include a conductive surface of a diaphragm facing conductive surfaces of several capacitive plate sections across a gap. The diaphragm may be configured to emit sound forward away from a magnet of the micro speaker, and the capacitive plate sections may be supported on the magnet behind the diaphragm. In an embodiment, the gap provides an available travel for the diaphragm, which may be only a few millimeters. A sensing circuit may sense capacitances of the conductive surfaces to limit displacement of the diaphragm to within the available travel.