Lens Driving Module with Nested Coil and Magnetic Members
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Solution Overview
Problem
Conventional zoom lenses are too large to be accommodated in the miniaturized electronic devices such as cameras and smartphones, posing a challenge for focus adjustment and image stabilization in these devices.
Innovation Solution
A lens driving module is designed with a lens holder, a driving coil, and magnetic members that allow the lens to move relative to the magnetic members along specific axes, utilizing electromagnetic induction to achieve focus adjustment and image stabilization, while being compact enough to fit within miniaturized devices by optimizing the arrangement of the driving coil and magnetic members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional zoom lenses are used, then focus adjustment and image stabilization functions are achieved, but the device size becomes too large for miniaturized electronic devices
Solution Approach 1:
The patent implements a nested structure where the driving coil is positioned within the magnetic member assembly, and the lens holder is integrated within the driving coil structure. This nesting arrangement allows multiple functional components to occupy overlapping spatial volumes, significantly reducing the overall footprint of the lens module while preserving focus adjustment and image stabilization capabilities
Solution Approach 2:
The patent transitions from conventional planar arrangements to a three-dimensional configuration where the driving coil surrounds the magnetic members in a radial arrangement. The lens holder moves along the optical axis while the driving coil and magnetic members are positioned in radial directions, utilizing vertical and radial dimensions simultaneously to achieve compact packaging without compromising functional performance
2Ease of operation
If the lens holder moves along the optical axis for focus adjustment, then focus functionality is achieved, but the required space increases device volume
Solution Approach 1:
The patent employs dynamic electromagnetic interaction between the driving coil and magnetic members to achieve lens movement. Instead of mechanical linkages or motors, the system uses controllable electromagnetic forces to move the lens holder along the optical axis, enabling focus adjustment with minimal mechanical structure and reduced space requirements
Solution Approach 2:
The patent replaces conventional mechanical focusing mechanisms (such as screw drives or cam mechanisms) with an electromagnetic driving system. The driving coil generates electromagnetic forces that directly act on the magnetic members attached to the lens holder, eliminating the need for complex mechanical transmission components and reducing overall module volume
3Volume of moving object
If the driving coil and magnetic members are arranged to minimize space, then device compactness is improved, but electromagnetic interference may increase
Solution Approach 1:
The patent employs asymmetric positioning of the driving coil relative to the magnetic members, with the coil offset from the central optical axis. This asymmetric arrangement creates non-uniform magnetic field distribution that reduces electromagnetic interference along the optical axis while maintaining effective driving force for lens movement, thereby minimizing interference without increasing module 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 enables focus adjustment and image stabilization in miniaturized electronic devices by allowing the lens to move effectively within the device's constraints, while maintaining a compact form factor, thus addressing the size limitations of conventional zoom lenses.
Implementation Method 1
utilizing electromagnetic induction to achieve focus adjustment and image stabilization
Implementation Method 2
a driving coil, and magnetic members that allow the lens to move relative to the magnetic members
Data Source
AI summary
A lens driving module for holding and moving a lens is provided, including a lens holder having an accommodating space, a driving coil, a plurality of first magnetic members having a longitudinal structure, a virtual plane, and a plurality of second magnetic members, wherein the lens is disposed in the accommodating space. The lens holder is disposed between the first magnetic members and between the second magnetic members. The driving coil is disposed on the lens holder and surrounds the accommodating space. The virtual plane is perpendicular to a longitudinal axis of the longitudinal structure. The projections of the driving coil and the first magnetic members on the virtual plane along the longitudinal axis of the longitudinal structure overlap each other. When a first current flows through the driving coil, the lens holder moves relative to the first and second magnetic members along a first direction.