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:
Jul. 21, 2015
Filed:
Sep. 25, 2013
Applicant:
Apple Inc., Cupertino, CA (US);
Inventors:
Jeffrey N. Gleason, San Francisco, CA (US);
Richard H. Tsai, Cupertino, CA (US);
Assignee:
Apple Inc., Cupertino, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/02 (2006.01); H01L 41/08 (2006.01); H02N 2/00 (2006.01); B06B 1/02 (2006.01); H04N 5/225 (2006.01);
U.S. Cl.
CPC ...
B06B 1/0207 (2013.01); H04N 5/2252 (2013.01);
Abstract
A driver circuit for electro-active polymer (EAP) device has a shared, voltage boost circuit that is coupled to drive a common terminal of first and second EAP devices to a given voltage. A first voltage boost circuit is coupled to drive a respective terminal of the first EAP device to an opposite polarity voltage, while a second voltage boost circuit is coupled to drive a respective terminal of the second EAP device to an opposite polarity voltage. Other embodiments are also described and claimed.