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:
Dec. 27, 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); H02P 2203/01 (2013.01);
Abstract
A haptic engine includes a gap-closing actuator having a double-wound driving coil in which the two windings can be activated with two driving sources, respectively. Or, the two windings double-wound driving coil can be activated with a single driving source when the two windings are connected with each other either in series or in parallel. By using the double-wound driving coil in the gap-closing actuator as described, an instant inductance of either of the two windings can be determined without having to measure in real time a resistance of the corresponding winding.