Invention Grant
- Patent Title: Drift compensation for force sensing devices
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Application No.: US14696043Application Date: 2015-04-24
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Publication No.: US09885627B2Publication Date: 2018-02-06
- Inventor: Baboo V. Gowreesunker , Wayne C. Westerman
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Brownstein Hyatt Farber Schreck, LLP
- Main IPC: G01L25/00
- IPC: G01L25/00

Abstract:
Disclosed herein are methods and systems for compensating for drift that may be present in a force sensing device. In some embodiments, the force sensing device may be calibrated to compensate for the drift. The calibration may include receiving an input waveform associated with a received amount of force on the force sensing device. A system model that approximates a transfer function that provides an output waveform associated with the input waveform is then determined. Using the system model, an inverse transfer function associated with the system model is also determined. The inverse transfer function may then be applied to the output waveform which compensates for the drift.
Public/Granted literature
- US20160313205A1 Drift Compensation for Force Sensing Devices Public/Granted day:2016-10-27
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