Optical Member Driving Mechanism for Thin Device Focus Adjustment
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Solution Overview
Problem
Conventional optical member driving mechanisms in consumer electronic devices, such as smartphones and tablets, face challenges in maintaining device thickness when incorporating lens modules with long focal lengths, as they require increased thickness to accommodate the optical components.
Innovation Solution
An optical member driving mechanism comprising a movable portion connected to an optical member, a fixed portion with an accommodating space, and a driving assembly that includes magnetic permeability members, electromagnetic driving members, and damping elements to enable precise movement and rotation of the optical member, allowing for focus adjustment while minimizing device thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lens with a long focal length is disposed in the electronic device, then the photography or recording function is improved, but the thickness of the electronic device is increased
Solution Approach 1:
The patent employs a movable optical member that can dynamically adjust its position and orientation. The optical member is configured to move along the optical axis and rotate around the optical axis, enabling focus adjustment and light path control without requiring a long focal length lens, thus maintaining thin device profile while achieving photography function
Solution Approach 2:
The patent replaces traditional mechanical lens focusing mechanisms with an electromagnetic driving assembly. The driving assembly includes a coil and magnetic permeability member that generate electromagnetic forces to move the optical member, eliminating the need for bulky mechanical structures and reducing overall device thickness
2Adaptability or versatility
If an optical member driving mechanism is designed to adjust focus and light path, then the functionality is improved, but the device complexity is increased
Solution Approach 1:
The optical member is designed to perform multiple functions simultaneously: it can move along the optical axis for focus adjustment, rotate around the optical axis for light path control, and is positioned by a single driving assembly. This multi-functionality reduces the need for separate mechanisms for each function, thereby simplifying the overall device complexity
Solution Approach 2:
The patent combines the focus adjustment mechanism and light path adjustment mechanism into a single integrated optical member driving system. The movable optical member and its driving assembly handle both functions, reducing the number of separate components and simplifying the overall mechanism
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
Enables efficient focus adjustment and light path adjustment in electronic devices, maintaining device thinness by securely affixing the optical member and utilizing electromagnetic driving to rotate the optical member relative to the fixed portion, thereby enhancing the functionality and compactness of the device.
Implementation Method 1
The driving assembly is configured to drive the movable portion to move relative to the fixed portion
Implementation Method 2
The optical member driving mechanism further includes a magnetic permeability member embedded in the movable portion. The movable portion has a plurality of grooves, and the magnetic permeability member is exposed from the grooves. The driving assembly includes a magnet disposed on the movable portion, and at least a portion of the magnetic permeability member is adjacent to the magnet.
Data Source
AI summary
An optical member driving mechanism is provided, including a movable portion, a fixed portion, and a driving assembly. The movable portion is connected to an optical member. The fixed portion has an accommodating space, and the optical member is received in the accommodating space. The movable portion is movable relative to the fixed portion. The driving assembly is configured to drive the movable portion to move relative to the fixed portion.