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. 05, 2019
Filed:
Jun. 26, 2017
Apple Inc., Cupertino, CA (US);
Sinan Filiz, Sunnyvale, CA (US);
James E. Pedder, Thame, GB;
Charley T. Ogata, Sunnyvale, CA (US);
John Stephen Smith, San Jose, CA (US);
Dhaval Chandrakant Patel, San Jose, CA (US);
Shin John Choi, Sunnyvale, CA (US);
Brian Q. Huppi, San Francisco, CA (US);
Christopher J. Butler, San Jose, CA (US);
Martin P. Grunthaner, Los Altos, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
An optical force sensor that may compensate for environmental effects, including, for example, variations in temperature of the device or the surroundings. In some examples, two force-sensitive layers are separated by a compliant layer. The relative electrical response of the two force-sensitive layers may be used to compute an estimate of the force of a touch that reduces the effect of variations in temperature. In some examples, piezoelectric films having anisotropic strain properties are used to reduce the effects of temperature.