Sensor Shifting Actuator With Dual-Axis Frames for Camera Stabilization
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Solution Overview
Problem
Existing camera modules in mobile devices face challenges in achieving high zoom ratios and efficient focus adjustment and shake correction, particularly due to limitations in moving components like reflectors and lenses, which affect performance and power consumption.
Innovation Solution
A sensor shifting actuator with a housing, image sensor, moving frames, and a bridge portion supported by ball members, allowing movement in multiple axes, combined with shake and focus adjustment magnets and coils, enables precise focus adjustment and shake correction with reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reflector such as a prism is added to achieve high zoom ratio, then the total track length is extended, but the device complexity and space requirements increase
Solution Approach 1:
The patent implements a nested structure where the image sensor is positioned within the lens module housing, and the reflector is integrated into the lens module assembly. This nesting allows the high-zoom functionality to be achieved within a compact form factor, reducing overall device complexity while maintaining the extended track length needed for high zoom ratio.
Solution Approach 2:
The patent utilizes the third dimension (depth/track length) by extending the optical path through the reflector mechanism. This dimensional approach allows the zoom function to be achieved along the optical axis rather than requiring lateral expansion, thereby managing device complexity while improving adaptability.
2Reliability
If the lens module and reflector module are moved to achieve focus adjustment and shake correction, then the correction functions are improved, but the power consumption increases
Solution Approach 1:
The patent merges the focus adjustment and shake correction functions into a single integrated lens module assembly that moves together as one unit. This consolidation allows both correction functions to be achieved through a single driving mechanism, reducing the total power consumption compared to independently actuating separate modules while maintaining reliable correction performance.
Solution Approach 2:
The lens module assembly is designed as a multi-functional unit that simultaneously performs focus adjustment, shake correction, and optical transmission. This universal design eliminates the need for separate actuation systems for each function, thereby reducing power consumption while maintaining the reliability of both correction functions.
3Reliability
If the image sensor is moved in multiple directions for focus and shake correction, then the correction performance is improved, but the movement mechanism complexity increases
Solution Approach 1:
The patent segments the movement mechanism into two independent degrees of freedom: a first direction for focus adjustment and a second direction for shake correction. This segmentation allows each movement to be controlled independently through separate driving portions, simplifying the overall movement mechanism while achieving the required multi-directional correction performance.
Solution Approach 2:
The patent implements dynamic movement capabilities where the lens module assembly can shift positions in multiple directions as needed for focus and shake correction. The system uses dynamic positioning through controlled movement of the lens module and reflector assembly, allowing flexible adaptation to different correction requirements without increasing mechanism complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The actuator facilitates precise focus adjustment and shake correction with improved movement distance and reduced power consumption, enhancing camera module performance.
Implementation Method 1
a plurality of ball members, disposed between the second moving frame and the housing, configured to support another movement of the image sensor in the direction perpendicular to the imaging surface
Implementation Method 2
a bridge portion configured to curve in at least a portion thereof and support a movement of the image sensor in the direction parallel to the imaging surface
Implementation Method 3
a first moving frame, accommodated in the housing, configured to be movable in a direction parallel to the imaging surface, together with the image sensor; a second moving frame, accommodated in the housing, configured to be movable in a direction perpendicular to the imaging surface, together with the image sensor and the first moving frame
Data Source
AI summary
A sensor shifting actuator includes a housing having an internal space; an image sensor, accommodated in the housing, having an imaging surface; a first moving frame, accommodated in the housing, configured to be movable in a direction parallel to the imaging surface, together with the image sensor; a second moving frame, accommodated in the housing, configured to be movable in a direction perpendicular to the imaging surface, together with the image sensor and the first moving frame; a bridge portion configured to curve in at least a portion thereof and support a movement of the image sensor in the direction parallel to the imaging surface; and a plurality of ball members, disposed between the second moving frame and the housing, configured to support another movement of the image sensor in the direction perpendicular to the imaging surface.