Lens Driving Structure With Elastic PCB Link for Vibration Stress Relief
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Solution Overview
Problem
Existing voice coil motor (VCM) technologies in micro-scale camera modules face challenges with increased stress and deformation due to vibrations, leading to operation failures and deterioration in optical image stabilization (OIS) performance, particularly in high-resolution cellular phone cameras.
Innovation Solution
A lens moving apparatus with an elastic connection portion and dampers to alleviate stress on support members, incorporating a stepped portion and guide structure to enhance stability and reduce stress on the circuit board connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate motor is disposed at each lens assembly to enable independent driving, then driving precision and independence are improved, but device complexity and space consumption increase
Solution Approach 1:
The patent merges multiple lens driving motors into a single motor that can drive multiple lens assemblies simultaneously. This single motor integrates the driving functions of what would traditionally require separate motors, reducing device complexity while maintaining the capability to independently control each lens assembly through a shared driving mechanism
2Adaptability or versatility
If a separate motor is disposed at each lens assembly, then independent driving capability is improved, but the space required in the optical device increases
Solution Approach 1:
The patent combines multiple lens driving functions into a single motor unit, reducing the total volume occupied by driving mechanisms. This merged motor design maintains independent driving capability for each lens assembly while consuming less space than having separate motors for each lens
3Adaptability or versatility
If motors are disposed at multiple positions to drive different lens assemblies, then functional versatility is improved, but manufacturing cost and structural complexity increase
Solution Approach 1:
The patent merges multiple lens driving motors into a single motor that can drive multiple lens assemblies, reducing manufacturing costs by eliminating the need to produce and assemble multiple separate motor units. This single motor design maintains functional versatility to independently control each lens assembly while simplifying the manufacturing process
Solution Approach 2:
The patent implements a universal motor design that can perform multiple lens driving functions simultaneously. This single motor is designed to drive different lens assemblies through different mechanisms, providing multi-functionality that would traditionally require separate specialized motors 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 solution effectively reduces stress on support members, improving the reliability and performance of auto-focusing and handshake correction functions in compact camera modules by minimizing deformation and disconnection risks.
Implementation Method 1
An embodiment includes an elastic connection portion provided on a circuit board, thereby alleviating or reducing the stress applied to a support member
Implementation Method 2
The lens moving apparatus may include a first damper disposed between the elastic connection portion and the body to connect the elastic connection portion to the body
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
One embodiment comprises: a housing; a bobbin arranged in the housing; a first coil arranged on the bobbin; a magnet, which is arranged in the housing and corresponds to the first coil; an upper elastic member coupled to the top of the bobbin and the top of the housing; a second coil, which is arranged below the housing and corresponds to the magnet in the optical axis direction; a circuit board including a body arranged below the second coil, and a connective elastic part extending from the body; a base arranged below the body of the circuit board; and a support member having one end coupled to the upper elastic member, and having the other end coupled to the connective elastic part, wherein the connective elastic part includes a coupling part coupled to the other end of the support member, and a connection part for connecting the body and the coupling part.