OIS Driver Bias Positioning for Stable Video Image Stabilization
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Solution Overview
Problem
Electronic devices face performance degradation in image stabilization when optical image stabilization (OIS) is stopped and video digital image stabilization (VDIS) or electronic image stabilization (EIS) is used, especially when the device shakes intensely, as the OIS driver may be positioned out of the center of its driving range.
Innovation Solution
The electronic device includes a camera module with an OIS driver that can be fixed at a position biased away from the center of its driving range in a specific direction, determined based on the direction of gravity, allowing for stable operation of VDIS or EIS even when the device shakes significantly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the OIS driver is positioned at the center of the OIS driving range when OIS is stopped, then the device can perform VDIS/EIS, but the OIS driver may be out of the center position when the device shakes intensely, degrading VDIS/EIS performance
Solution Approach 1:
The system performs preliminary action by determining the gravity direction before VDIS/EIS operation and pre-positioning the OIS driver at a biased position away from the center in the direction opposite to gravity. This preliminary positioning ensures that when intense shaking occurs, the OIS driver remains within the stable range and maintains optimal performance for VDIS/EIS operation.
Solution Approach 2:
The system changes the position parameter of the OIS driver from the conventional center position to a biased position determined by gravity direction. This parameter change (position offset) is dynamically adjusted based on device orientation, allowing the OIS driver to operate within the stable range even during intense shaking, thereby improving both adaptability and reliability.
2Adaptability or versatility
If the OIS driver is fixed at a biased position away from the center, then VDIS/EIS performance is enhanced during intense shaking, but the OIS driver consumes more energy to maintain the biased position
Solution Approach 1:
The system performs preliminary action by determining the gravity direction before VDIS/EIS operation and pre-positioning the OIS driver at a biased position away from the center in the direction opposite to gravity. This preliminary positioning ensures that when intense shaking occurs, the OIS driver remains within the stable range and maintains optimal performance for VDIS/EIS operation.
Solution Approach 2:
The system changes the position parameter of the OIS driver from the conventional center position to a biased position determined by gravity direction. This parameter change (position offset) is dynamically adjusted based on device orientation, allowing the OIS driver to operate within the stable range even during intense shaking, thereby improving both adaptability and reliability.
Data Source
AI summary
According to an embodiment of the disclosure, an electronic device may include: a camera module including an optical image stabilization (OIS) driver which is shiftable within an OIS driving range; and at least one processor electrically connected with the camera module. The at least one processor may control the camera module to fix the OIS driver at a position that is biased away from a center of the OIS driving range in a first direction, may obtain image frames through the camera module while fixing the OIS driver, and may obtain a moving image by performing at least one of video digital image stabilization (VDIS) or electronic image stabilization (EIS) with respect to the image frames. Various other embodiments that are understood through the specification are possible.