Optical Element Driving Mechanism With VCM Layout for Precise Positioning
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Solution Overview
Problem
The miniaturization of electronic devices, such as smartphones and laptops, complicates the mechanical design of driving mechanisms for optical elements, leading to low reliability and positioning accuracy.
Innovation Solution
A driving mechanism comprising a fixed and movable part, with a flexible circuit board and a driving assembly that includes longitudinal and horizontal magnetic elements and coils, allowing for precise movement of optical elements for auto-focusing and optical image stabilization, while minimizing size and increasing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If miniaturization is implemented in electronic devices, then device size is reduced, but reliability and positioning accuracy of the driving mechanism deteriorate
Solution Approach 1:
The driving mechanism is divided into distinct functional modules: a driving assembly with voice coil motors for precise positioning, a movable platform holding the optical element, and a fixed platform with circuit substrates. This segmentation allows each module to be optimized independently, maintaining reliability while reducing overall device volume.
Solution Approach 2:
The circuit substrates are integrated within the fixed platform structure, and the movable platform is nested within the housing. The driving assembly components (coils and magnetic elements) are positioned in nested arrangements where coils are disposed on one side of the movable platform and magnetic elements on the other, maximizing space utilization while maintaining functional integrity.
2Volume of moving object
If miniaturization is implemented in electronic devices, then device size is reduced, but positioning accuracy of the driving mechanism deteriorates
Solution Approach 1:
Traditional mechanical focusing mechanisms are replaced with voice coil motor-driven electromagnetic systems. The driving assembly uses electromagnetic forces between coils and magnetic elements to achieve precise, contactless positioning of the optical element, eliminating mechanical wear and improving positioning accuracy in compact form factors.
Solution Approach 2:
The system employs dual voice coil motors with independent control, allowing for fine adjustment of positioning parameters. The movable platform can be positioned with high precision by controlling the electromagnetic force parameters, enabling accurate focus adjustment despite the reduced device size.
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 solution enhances the reliability and positioning accuracy of optical element movement, enabling efficient auto-focusing and optical image stabilization in compact electronic devices by utilizing a flexible circuit board and strategically positioned magnetic and coil components.
Implementation Method 1
a first coil and a second coil, the first and second coils being disposed on opposite sides of the movable platform... the first and second coils are configured for generating an electromagnetic force to move the first magnetic element and the movable part along an optical axis
Data Source
AI summary
A driving mechanism for moving an optical element is provided. The driving mechanism includes a fixed part, a movable part, and a driving assembly. The movable part is movably connected to the fixed part for holding the optical element. The driving assembly is configured for moving the optical element relative to the fixed part.