Lens Driving Mechanism With 3D Circuit and Position Feedback
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Solution Overview
Problem
The miniaturization of electronic devices, such as cameras and smartphones, increases the difficulty of mechanical design, leading to low reliability and driving force for moving optical elements like lenses.
Innovation Solution
A driving mechanism comprising a fixed module, a movable module, a driving assembly, a position-sensing element, and a 3D circuit, where the 3D circuit is embedded in the base and electrically connected to the position-sensing element and the driving assembly, enabling precise movement control of the optical element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If miniaturization is implemented in electronic devices, then device size is reduced, but mechanical strength and driving force for moving optical elements deteriorate
Solution Approach 1:
The patent combines the driving assembly, position-sensing element, and 3D circuit into an integrated module embedded within the base. This merging of components allows for compact arrangement that reduces overall device volume while maintaining sufficient mechanical strength through the integrated structure's cohesive design.
Solution Approach 2:
The patent employs a 3D circuit configuration that extends in multiple directions (first direction non-parallel to reference plane, second and third segments on reference plane) to achieve efficient space utilization. This dimensional approach allows compact component layout that reduces device footprint while preserving mechanical integrity through optimized spatial arrangement.
2Volume of moving object
If miniaturization is implemented in electronic devices, then device size is reduced, but reliability of mechanical components deteriorates
Solution Approach 1:
The integration of the driving assembly, position-sensing element, and 3D circuit into a unified module improves reliability by reducing the number of separate components and interconnections. This merged structure minimizes potential failure points while maintaining compact dimensions.
Solution Approach 2:
The position-sensing element provides real-time feedback on the movable module's position, enabling precise control and compensation for mechanical variations. This feedback mechanism enhances reliability by allowing the system to maintain accurate performance despite miniaturization-induced mechanical constraints.
3Adaptability or versatility
If conventional coils and magnets are used for lens focus adjustment, then focus functionality is achieved, but device complexity and space requirements increase
Solution Approach 1:
The patent merges the driving assembly with the position-sensing element and 3D circuit into a single integrated module. This combination simplifies mechanical design by reducing the number of separate components while maintaining full focus adjustment functionality through the coordinated operation of the integrated elements.
Solution Approach 2:
The integrated module serves multiple functions simultaneously: the driving assembly provides focus adjustment, the position-sensing element monitors position, and the 3D circuit provides electrical connections. This multi-functionality reduces device complexity by eliminating the need for separate components for each function.
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 proposed driving mechanism enhances the mechanical strength and reliability of the device, while allowing for miniaturization and efficient auto-focusing and optical image stabilization functions.
Implementation Method 1
several coils and magnets corresponding thereto are usually used for adjusting the focus of a lens
Implementation Method 2
The position-sensing element is disposed on the base to detect the movement of the movable module relative to the fixed module
Data Source
AI summary
A driving mechanism is provided for moving an optical element, including a fixed module, a movable module holding the optical element, a driving assembly for driving the movable module to move relative to the fixed module, a position-sensing element, and a 3D circuit. The fixed module has a base, and the position-sensing element is disposed on the base to detect the movement of the movable module relative to the fixed module. The 3D circuit is embedded in the base and electrically connected to the position-sensing element.