Piezoelectric Optical System for Auto-Focus and Stabilization
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Solution Overview
Problem
Existing camera module driving mechanisms struggle to simultaneously achieve auto-focus, optical image stabilization, and object tracking, which are essential for modern electronic devices like smartphones.
Innovation Solution
The optical system incorporates a fixed assembly, a movable part, and a driving assembly with a piezoelectric mechanism. The movable part is connected to an optical module and moves relative to the fixed assembly through a guiding assembly, driven by a contact member and transfer assembly that utilize piezoelectric elements to generate rapid and precise movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional driving mechanism is used, then the structure is simple, but it cannot simultaneously achieve auto-focus, optical image stabilization, and object tracking
Solution Approach 1:
The patent applies multi-functionality by integrating three distinct functions (auto-focus, optical image stabilization, and object tracking) into a single driving mechanism. The movable part is designed to perform multiple operations: moving along the optical axis for auto-focus, rotating around the optical axis for object tracking, and laterally for optical image stabilization. This allows one mechanism to replace what would traditionally require separate mechanisms for each function.
Solution Approach 2:
The patent employs dynamics by making the guiding assembly configurable between different states. The guiding assembly can switch between guiding the movable part along the optical axis (for auto-focus), guiding rotation around the optical axis (for object tracking), and guiding lateral movement (for optical image stabilization). This dynamic reconfiguration allows the same structural components to serve multiple functional purposes.
2Reliability
If the optical module is made heavier to improve image quality, then image quality improves, but the driving speed and response time decrease
Solution Approach 1:
The patent replaces conventional mechanical driving mechanisms with a piezoelectric driving mechanism. The piezoelectric element converts electrical signals directly into mechanical displacement, providing faster response times and higher precision. This substitution eliminates the need for traditional motors and transmission mechanisms, reducing mechanical inertia and enabling the optical module to achieve rapid positioning even when relatively heavy.
Solution Approach 2:
The patent changes the driving mechanism's fundamental parameter from electromagnetic (motors) to piezoelectric (direct electrical-to-mechanical conversion). This parameter change enables faster response times and higher precision positioning, allowing the system to maintain high driving speed even with a heavier optical module designed for improved image quality.
3Volume of moving object
If the camera module is miniaturized, then the device size is reduced, but the driving precision and stability deteriorate
Solution Approach 1:
The patent uses piezoelectric elements to replace conventional mechanical driving systems, enabling precise control of the movable part's position despite the miniaturized size. The piezoelectric effect allows for nanometer-level precision in displacement control, maintaining driving precision even when the overall module size is reduced for miniaturization.
Solution Approach 2:
The patent employs dynamic guiding through the guiding assembly, which can adaptively guide the movable part in different directions based on the required function. This dynamic guidance system maintains stability and precision by providing real-time directional control, allowing the miniaturized module to achieve accurate positioning without compromising driving precision.
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
This configuration enables the optical system to quickly and accurately drive the optical module, achieving the functions of auto-focus, optical image stabilization, and object tracking, thereby enhancing the camera module's performance and capabilities.
Implementation Method 1
The driving assembly is configured to drive the movable part to move relative to the fixed assembly. The optical system further includes a guiding assembly, and the movable part moves relative to the fixed assembly through the guiding assembly.
Data Source
AI summary
An optical system includes a fixed assembly, a movable part and a driving assembly. The movable part is configured to be connected to an optical module, and the movable part is movable relative to the fixed assembly. The driving assembly is configured to drive the movable part to move relative to the fixed assembly. The optical system further includes a guiding assembly, and the movable part moves relative to the fixed assembly through the guiding assembly.