Rotational Image Sensor Stabilization via Ball Bearings
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Solution Overview
Problem
Existing lens assemblies in electronic devices struggle to effectively compensate for rotational vibrations, limiting the quality of captured images as they primarily rely on linear movement for automatic focusing and optical image stabilization, which is insufficient for correcting curved or rotational vibrations.
Innovation Solution
A lens assembly that incorporates a structure allowing the image sensor to rotate with respect to the housing, utilizing a ring-shaped rotation member and balls to mitigate friction, and an electromagnetic driving mechanism to compensate for rotational vibrations, enabling improved image stabilization and focusing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If linear movement of lens or image sensor is used for automatic focusing and OIS, then the structure is simple and easy to manufacture, but the ability to compensate for rotational vibrations is insufficient
Solution Approach 1:
The patent transitions from static linear movement to dynamic rotational movement. The image sensor assembly is enabled to rotate around the optical axis through a rotation member with balls that reduce friction, allowing the system to dynamically respond to rotational vibrations and improve image stabilization performance
Solution Approach 2:
The patent adds a rotational dimension to the traditional linear movement mechanism. By enabling the image sensor to rotate around the optical axis in addition to linear movement, the system can compensate for both linear and rotational vibrations, effectively addressing the limitation of one-dimensional stabilization
2Reliability
If rotation member with balls is introduced to enable image sensor rotation, then rotational vibration compensation is improved, but the device complexity increases
Solution Approach 1:
The rotation member acts as an intermediary between the image sensor assembly and the housing. It provides a controlled rotational interface with balls that reduce friction while maintaining precise rotational movement, enabling smooth rotation without directly coupling the image sensor to the housing
Solution Approach 2:
The patent replaces direct mechanical coupling with a ball-based rotational mechanism. The balls interposed between the rotation member and housing reduce friction and mechanical binding, allowing smoother rotational movement compared to traditional direct mechanical connections
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
This solution enhances the quality of captured images by effectively correcting rotational vibrations, improving image stability and clarity, and integrating automatic focusing and optical image stabilization functions.
Implementation Method 1
at least one coil mounted to one of the housing and the rotation member, between the rotation member and the at least one first yoke, and at least one magnetic body mounted to the other of the housing and the rotation member, between the rotation member and the at least one first yoke, wherein the image sensor assembly rotates by an electromagnetic force generated between the at least one coil and the at least one magnetic body
Implementation Method 2
a plurality of balls interposed between the rotation member and the other surface of the housing
Data Source
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AI summary
A lens assembly and an electronic device are provided. The lens assembly and/or the electronic device includes a lens barrel, a housing configured to accommodate the lens barrel on one surface of the housing, and an image sensor assembly mounted to the other surface of the housing, the image sensor being configured to rotate around an optical axis of the lens barrel. The image sensor assembly includes a ring-shaped rotation member facing the other surface of the housing, and a plurality of balls interposed between the rotation member and the other surface of the housing. The rotation member rotates on a plane perpendicular to the optical axis.