Piezoelectric Lens Module Anti-Shake Mechanism
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Solution Overview
Problem
Conventional optical anti-shake mechanisms for lens modules are complex, difficult to assemble, costly, and occupy significant volume, making them inefficient in correcting position deviations caused by hand-shaking and external disturbances.
Innovation Solution
An anti-shake device featuring a piezoelectric motor mounted on a base plate with a friction plate and elastic elements, which detects position deviations and adjusts the lens module along two orthogonal axes to compensate for optical path shifts using a control module and position-detecting module, ensuring precise alignment with the image sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional optical anti-shake mechanisms are used, then position deviation compensation is achieved, but device complexity increases
Solution Approach 1:
The patent combines multiple anti-shake mechanisms into a single integrated device that simultaneously compensates for position deviations in both horizontal and vertical directions. The piezoelectric motor and elastic elements are merged into one compact assembly that works together to achieve stabilization, reducing the number of separate components needed.
Solution Approach 2:
The anti-shake device is designed to perform multiple functions: it compensates for position deviations in two orthogonal directions, maintains lens module stability, and provides vibration damping. This multi-functional design eliminates the need for separate mechanisms for each function, thereby reducing overall device complexity.
2Reliability
If conventional optical anti-shake mechanisms are used, then position deviation compensation is achieved, but manufacturing cost increases
Solution Approach 1:
The piezoelectric motor in the patent generates its own driving force through piezoelectric deformation without requiring external motors or complex actuation systems. The elastic elements automatically provide restoring forces based on their mechanical properties, eliminating the need for additional damping mechanisms or control systems.
Solution Approach 2:
The patent uses simple, inexpensive components such as elastic elements and piezoelectric motors that can be easily manufactured and replaced if needed. These components are designed to be cost-effective while still providing the required anti-shake functionality, reducing overall manufacturing costs.
3Reliability
If conventional optical anti-shake mechanisms are used, then position deviation compensation is achieved, but volume occupation increases
Solution Approach 1:
The patent employs a nested structure where the piezoelectric motor is positioned within the lens module assembly, and the elastic elements are arranged around the base plate. This nested arrangement allows multiple components to occupy overlapping spatial volumes, significantly reducing the overall device footprint.
Solution Approach 2:
The anti-shake mechanism compensates for deviations in two orthogonal directions (horizontal and vertical) using a compact two-dimensional arrangement. By addressing both directions within the same planar space rather than requiring three-dimensional separation, the device volume is minimized while maintaining full compensation capability.
4Reliability
If conventional optical anti-shake mechanisms are used, then position deviation compensation is achieved, but assembly difficulty increases
Solution Approach 1:
The patent divides the anti-shake device into distinct modular components: a base plate with elastic elements, a lens module with piezoelectric motor, and a friction plate. Each module can be assembled and tested independently before being integrated into the final assembly, significantly simplifying the manufacturing and assembly process.
Solution Approach 2:
The patent employs dynamic components such as elastic elements that automatically adjust to position deviations and piezoelectric motors that respond in real-time to stabilization needs. This dynamic design eliminates the need for complex mechanical linkages or rigid assemblies, making the overall structure easier to assemble and adjust.
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 provides a concise, easy-to-assemble, cost-effective anti-shake mechanism that effectively compensates for position deviations, maintaining image quality by precisely adjusting the lens module along the optical path, thus enhancing imaging stability without the drawbacks of traditional systems.
Implementation Method 1
The piezoelectric member is located on the base plate and provides the lens module to sit on the top thereof... the control module can provide relevant voltages to the piezoelectric members so as to actuate the piezoelectric members to move, along the first axial direction and the second axial direction, the lens module with respect to the base plate
Implementation Method 2
The elastic elements extending parallel to the optical path are located to circulate around the base plate so as to maintain substantial parallel spacing between the lens module and the base plate
Implementation Method 3
The friction plate is located to the bottom of the lens module and is to depress upon the piezoelectric members
Data Source
AI summary
An anti-shake device furnished between a lens module and an image sensor. An optical path is defined along the lens module and image sensor. The anti-shake device comprises a base plate, at least one piezoelectric member and a circuit member. The base plate is located in the optical path and has a surface facing the lens module, wherein a first axial direction and a second axial direction are defined on the surface. The piezoelectric member is located on the base plate and contacts with the lens module. The circuit member located on the base plate comprises a control module for controlling the piezoelectric member to drive the lens module moving alone the first and second axial directions in order to adjust the deviation caused by shaking.