Optical Element Drive Mechanism With Piezo Damping for Image Stability
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Solution Overview
Problem
Electronic devices such as smartphones and tablets often experience blurry images or video due to shock or vibration, which existing optical element drive mechanisms fail to adequately address, leading to a demand for higher quality image and video capture.
Innovation Solution
An optical element drive mechanism incorporating a drive assembly with a piezoelectric element, resilient element, and transmission element, along with a buffer assembly and guidance assembly, to stabilize and guide the movement of the optical element, ensuring accurate and stable positioning despite vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional drive mechanism is used, then the device structure is simple, but the image quality deteriorates due to shock and vibration causing blurry images
Solution Approach 1:
The drive mechanism is segmented into multiple functional components: a drive assembly containing piezoelectric elements for precise optical element positioning, a buffer assembly with damping elements for vibration absorption, and a guidance assembly with guide rails for stable movement. This segmentation allows each component to specialize in one function, achieving high image quality while managing overall system complexity through modular design
Solution Approach 2:
The buffer assembly acts as an intermediary between the external vibration environment and the optical element drive system. The damping elements in the buffer assembly absorb and isolate vibrations before they can affect the optical elements, protecting the imaging system from shock and vibration-induced blurriness
2Stability of the object's composition
If vibration absorption is enhanced, then image stability improves, but the response speed of the drive mechanism decreases
Solution Approach 1:
The system employs dynamic characteristics of the buffer assembly that adapts to different operating conditions. The damping elements provide vibration absorption during normal operation to ensure image stability, while the piezoelectric drive assembly maintains high response speed for rapid focusing adjustments. The guidance assembly ensures smooth, controlled movement that balances stability and speed
Solution Approach 2:
The buffer assembly is pre-configured with damping elements positioned to absorb vibrations before they can significantly impact the optical elements. This preliminary vibration mitigation allows the drive mechanism to maintain both image stability and responsive performance without compromising either attribute
3Manufacturing precision
If precise positioning is achieved through complex drive mechanisms, then manufacturing precision improves, but the ease of manufacture deteriorates
Solution Approach 1:
The positioning system is divided into independent modules: piezoelectric elements for precise actuation, buffer elements for vibration control, and guide rails for movement constraint. Each module can be manufactured and tested separately, then assembled into the complete drive mechanism, improving ease of manufacture while maintaining high positioning precision
Solution Approach 2:
The piezoelectric elements utilize the piezoelectric effect, where electrical voltage directly controls mechanical displacement with high precision. By changing electrical parameters (voltage, frequency) rather than mechanical parameters, the system achieves precise positioning control while simplifying the actuation mechanism and improving manufacturability
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 enhances image quality by enabling precise auto-focus and optical image stabilization, effectively reducing the impact of vibrations and shocks on image clarity.
Implementation Method 1
The piezoelectric element includes a piezoelectric material, the piezoelectric element generates a driving force
Implementation Method 2
The resilient element is disposed on the piezoelectric element
Implementation Method 3
the optical element drive mechanism further includes a buffer assembly for absorbing vibration of the driving assembly
Data Source
AI summary
An optical element drive mechanism is provided. The optical element drive mechanism includes an immovable part, a movable part, and a drive assembly. The movable part is connected to an optical element that includes an optical axis. The movable part is movable relative to the immovable part. The drive assembly drives the movable part to move relative to the immovable part.