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US Patent 9885627 Drift compensation for force sensing devices

Patent 9885627 was granted and assigned to Apple (company) on February, 2018 by the United States Patent and Trademark Office.

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Patent abstractTimelineTable: Further ResourcesReferences
Is a
Patent
Patent

Patent attributes

Patent Applicant
Apple (company)
Apple (company)
Current Assignee
Apple (company)
Apple (company)
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
9885627
Date of Patent
February 6, 2018
Patent Application Number
14696043
Date Filed
April 24, 2015
Patent Citations Received
‌
US Patent 12022021 Band adjustment for electronic devices
3
‌
US Patent 11747950 Force determination based on capacitive sensing
Patent Primary Examiner
‌
Natalie Huls
Patent 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.

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