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:
Nov. 08, 2022
Filed:
Jun. 12, 2020
Applicant:
Apple Inc., Cupertino, CA (US);
Inventors:
Riccardo Tarelli, San Francisco, CA (US);
Yumeng Liu, Sunnyvale, CA (US);
Assignee:
Apple Inc., Cupertino, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 33/12 (2006.01); H02P 7/02 (2016.01); H02P 23/14 (2006.01); H02P 25/032 (2016.01); H02P 25/22 (2006.01); B06B 1/04 (2006.01);
U.S. Cl.
CPC ...
H02K 33/12 (2013.01); H02P 7/02 (2016.02); H02P 23/14 (2013.01); H02P 25/032 (2016.02); H02P 25/22 (2013.01); B06B 1/045 (2013.01);
Abstract
A haptic engine includes a linear resonant actuator having a double-wound driving coil which is used for sensing a back electromotive force (EMF) voltage independently of the coil resistance, thus minimizing the back EMF voltage's sensitivity to temperature.