Invention Grant
- Patent Title: Drift correction with phase and amplitude compensation for optical image stabilization
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Application No.: US16752009Application Date: 2020-01-24
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Publication No.: US11381745B2Publication Date: 2022-07-05
- Inventor: Pierre Grenet , Sebastien Riccardi , Joe Youssef
- Applicant: InvenSense, Inc.
- Applicant Address: US CA San Jose
- Assignee: InvenSense, Inc.
- Current Assignee: InvenSense, Inc.
- Current Assignee Address: US CA San Jose
- Agency: DLA Piper LLP (US)
- Main IPC: H04N5/232
- IPC: H04N5/232 ; G06T7/80 ; G06T7/20

Abstract:
Systems and methods of correcting for signal drift in optical image stabilization of a portable device. An accelerometer is used to obtain an acceleration signal corresponding to acceleration of the portable device. A gravity component is removed from the accelerometer signal to obtain a proper acceleration signal. A double integration is performed on the proper acceleration signal to obtain a translation signal. A drift component of the translation signal is estimated. The estimated drift component is used to generate a drift correction signal. A phase compensation signal is determined based on a plurality of phase responses of a plurality of components of the optical image stabilization system. The drift correction signal and the phase compensation signal are applied to an actuator controller which controls movement of a lens within the portable device as part of the process for optical image stabilization.
Public/Granted literature
- US20200288061A1 Drift Correction With Phase And Amplitude Compensation For Optical Image Stabilization Public/Granted day:2020-09-10
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