Piezoelectric Image Stabilization Device for Mobile Camera Miniaturization
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Solution Overview
Problem
Existing image-stabilization systems for mobile phone cameras are complex and bulky, failing to provide effective anti-handshake compensation due to their design, which is not suitable for the miniaturized and lightweight nature of mobile phone cameras.
Innovation Solution
A miniaturized image-stabilization driving device using two intersecting piezoelectrical elements and integrated sliding members to drive an image sensor in a plane, featuring a simple structure and easy assembly, with elastic holding portions and piezoelectrical ceramic sheets for linear movement, and optionally incorporating a position sensor for feedback control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional multi-layer metal frame structures are used for image stabilization, then image stabilization function is achieved, but device complexity and volume increase
Solution Approach 1:
The patent combines multiple stabilization functions into a single integrated driving device. The first and second piezoelectrical elements are integrated within the same device housing, sharing common structural components such as the driving cavity and elastic holding portions. This merging approach achieves image stabilization functionality while reducing overall device complexity compared to separate stabilization systems.
Solution Approach 2:
The patent employs a nested structure where the first piezoelectrical element and second piezoelectrical element are positioned within the same driving device housing. The elastic holding portions are nested within the driving cavity, and the sliding members move within constrained paths defined by the housing structure. This nesting arrangement compactly packs multiple functional elements into a unified device.
2Reliability
If conventional image stabilization systems are integrated into mobile phone cameras, then anti-hand shake compensation is provided, but the system becomes bulky and difficult to miniaturize
Solution Approach 1:
The patent uses elastic holding portions made from flexible elastic materials to connect and support the piezoelectrical elements. These elastic components provide the necessary mechanical compliance and movement capability while occupying minimal space. The flexible nature of these elastic films allows the system to achieve stabilization functionality within a compact volume suitable for mobile phone integration.
Solution Approach 2:
The patent replaces traditional mechanical linkage systems with piezoelectrical elements that directly convert electrical signals to mechanical displacement. This substitution eliminates the need for complex mechanical gears, linkages, and transmission mechanisms, thereby significantly reducing system volume while maintaining effective anti-hand shake compensation capability.
3Reliability
If complex multi-component stabilization mechanisms are used, then image quality is stabilized, but assembly process becomes complicated
Solution Approach 1:
The patent integrates multiple stabilization functions into a single driving device housing that contains both piezoelectrical elements and their supporting structures. By combining what would traditionally be separate components into one integrated unit, the number of assembly steps is reduced, and the assembly process becomes simpler while maintaining effective image quality stabilization.
Solution Approach 2:
The elastic holding portions are designed to automatically secure the piezoelectrical elements through their elastic properties. The elastic materials naturally conform to and hold the piezoelectrical elements in place, eliminating the need for additional fastening operations or complex mounting procedures. This self-service characteristic simplifies the assembly process while ensuring reliable component positioning for effective image stabilization.
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 compact and easy-to-assemble image-stabilization system that effectively reduces hand-shake induced blur, enhancing image quality in mobile phone cameras by allowing precise movement of the image sensor, addressing the limitations of conventional systems.
Implementation Method 1
a first piezoelectrical element having first holding surfaces to be elastically held by the first elastic holding portion so as to drive the first sliding member to move linearly
Implementation Method 2
the first sliding member having a first elastic holding portion at bottom thereof; a first piezoelectrical element having first holding surfaces to be elastically held by the first elastic holding portion
Data Source
AI summary
Disclosed is an image-stabilization driving device including a first sliding member connected to an image sensor; a first piezoelectrical element for driving the first sliding member to move linearly along a first direction; a second sliding member connected to the first piezoelectrical element; and a second piezoelectrical element for driving the second sliding member to move linearly along a second direction intersecting with the first direction. The first and second piezoelectrical elements are adapted to drive the image sensor to move in a plane, thereby providing a structurally simple and miniaturized image-stabilization driving device.