US Patent No. 10,338,755

FABRIC SENSING DEVICE


Patent No. 10,338,755
Issue Date July 02, 2019
Title Fabric Sensing Device
Inventorship Daniel A. Podhajny, San Jose, CA (US)
Kathryn P. Crews, San Francisco, CA (US)
Daniel D. Sunshine, Sunnyvale, CA (US)
Assignee Apple Inc., Cupertino, CA (US)

Claim of US Patent No. 10,338,755

7. A touch-sensitive textile device comprising:a first set of conductive threads disposed in a first textile layer;
a second set of conductive threads disposed in a second textile layer, wherein the first textile layer is formed from a first set of nonconductive threads interwoven with the first set of conductive threads and the second textile layer is formed from a second set of nonconductive threads interwoven with the second set of conductive threads;
a spacer structure separating the first and second textile layers, the spacer structure configured to deflect in response to a touch on the first or second textile layer; and
a sensing circuit operatively coupled to the first and second set of conductive threads, wherein the sensing circuit is configured to:
apply a drive signal to the first set of conductive threads, and
detect a variation in resistance between any one of the first set of conductive threads and any one of the second set of conductive threads.