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:
May. 23, 2017
Filed:
Feb. 05, 2015
Applicant:
Nxp B.v., Eindhoven, NL;
Inventors:
Christophe Marc Macours, Leuven, BE;
Shawn William Scarlett, Nijmegen, NL;
Michael Joehren, San Jose, CA;
Assignee:
NXP B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/232 (2006.01); H04N 5/225 (2006.01); H02P 6/18 (2016.01); H02P 25/034 (2016.01);
U.S. Cl.
CPC ...
H04N 5/2253 (2013.01); H02P 6/183 (2013.01); H02P 25/034 (2016.02);
Abstract
A voice coil motor displacement sensor and a voice coil motor controller that uses said sensor. The sensor configured to apply an alternating measurement signal at a predetermined frequency to a voice coil motor, the sensor configured to use a measure of a voltage across and a current through the voice coil motor to determine its impedance at the predetermined frequency and determine an estimated displacement of said voice coil motor using said impedance and a predetermined displacement-impedance function.