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:
Apr. 07, 2020
Filed:
Feb. 22, 2019
Applicant:
Apple Inc., Cupertino, CA (US);
Inventors:
Denis G. Chen, San Jose, CA (US);
Jui Hua Liu, Cupertino, CA (US);
Xingxing Cai, Santa Clara, CA (US);
Assignee:
Apple Inc., Cupertino, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B 11/14 (2006.01); G01D 5/20 (2006.01); G01B 11/00 (2006.01); G01D 5/30 (2006.01); G01D 5/14 (2006.01);
U.S. Cl.
CPC ...
G01B 11/14 (2013.01); G01B 11/002 (2013.01); G01D 5/2013 (2013.01); G01D 5/30 (2013.01); G01D 5/142 (2013.01);
Abstract
Systems and techniques are described for measuring displacement of a moving mass by combining (i) information obtained from scanning, using a beam of light, an intensity pattern disposed on a surface of the mass, with (ii) information obtained when a coil interacts with a magnet attached to the moving mass.