Camera Module Lens Drive with Orthogonal Flat Spring Guidance
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Solution Overview
Problem
Existing optical element driving devices face challenges in appropriately guiding the movement of optical elements due to rotational forces, leading to misalignment and improper movement.
Innovation Solution
The optical element driving device employs a guide mechanism with pairs of flat spring portions to guide the movement of movable bodies in orthogonal directions, utilizing piezoelectric drivers to precisely control the movement of optical elements along X, Y, and Z axes, ensuring accurate alignment and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a lens drive device uses V-shaped grooves and metal plates to guide movement, then the structure can be simplified, but the movement guidance precision deteriorates due to rotational forces causing misalignment
Solution Approach 1:
The guide mechanism is divided into multiple flat spring portions (first flat spring portions and second flat spring portions) that are separated in orthogonal directions. Each set of flat spring portions independently guides movement in its specific direction, preventing rotational forces from causing misalignment while maintaining structural simplicity.
Solution Approach 2:
Different regions of the guide mechanism have different functional properties - the first flat spring portions are optimized for guiding movement in the first direction while the second flat spring portions handle the second direction. This localized functional differentiation ensures precise movement guidance without requiring complex integrated structures.
2Manufacturing precision
If flat spring portions are used to guide movement in orthogonal directions, then movement guidance precision is improved, but device complexity increases
Solution Approach 1:
Multiple flat spring portions are integrated into a unified guide mechanism structure. The first flat spring portions and second flat spring portions are configured to work together as a coordinated system, sharing common mounting structures and working planes, which reduces overall device complexity despite the multi-directional guidance functionality.
Solution Approach 2:
The guide mechanism using flat spring portions serves multiple functions simultaneously - it guides movement in orthogonal directions, maintains alignment, and provides structural support. This multi-functionality reduces the need for separate components, thereby reducing overall device complexity.
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 guides and stabilizes the movement of optical elements, enhancing the precision and reliability of optical element positioning within camera modules.
Implementation Method 1
utilizing piezoelectric drivers to precisely control the movement of optical elements along X, Y, and Z axes
Implementation Method 2
a first guide mechanism configured to guide movement of the first movable body in the first movement direction, and a second guide mechanism configured to guide movement of the second movable body in the second movement direction
Data Source
AI summary
An optical element driving device includes a fixed-side member including a base member, an optical element holding member, a first movable body, a second movable body, a first driver, a second driver, a first guide mechanism, and a second guide mechanism. The first guide mechanism includes a pair of first flat spring portions facing each other in parallel and separated in a first movement direction and extending in a second movement direction. The second guide mechanism includes a pair of second flat spring portions facing each other in parallel and separated in the second movement direction and extending in the first movement direction.