MEMS Package Movable Platform Elastic Restoring Members
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Solution Overview
Problem
Existing MEMS actuator technologies face challenges in precisely adjusting focus length and sampling position in image acquiring devices with auto-focus and optical image stabilization functions, as they lack effective mechanisms for restoring the position of movable sensors after movement.
Innovation Solution
A MEMS package with a movable platform and elastic restoring members, where the platform is connected to a fixed frame via comb electrodes and elastic restoring members, allowing for precise movement and restoration, and incorporating a sensor chip for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a movable platform is used to adjust focus length and sampling position, then the adaptability of the image acquiring device is improved, but the reliability of position restoration deteriorates due to lack of effective restoring mechanism
Solution Approach 1:
The patent applies the dynamics principle by implementing a movable platform that can dynamically change position to achieve different focus lengths and sampling positions. The platform is designed to be movable rather than fixed, allowing real-time adjustment while maintaining reliable restoration through elastic restoring members that automatically return the platform to its original position after movement.
Solution Approach 2:
The patent applies parameter changes by utilizing the elastic properties of the restoring members to change the position parameter of the movable platform. The elastic restoring members store and release mechanical energy to change the platform's position dynamically, achieving both adaptability through position variation and reliability through automatic restoration to the initial state.
2Reliability
If elastic restoring members are added to restore platform position, then the reliability of position restoration is improved, but the device complexity increases
Solution Approach 1:
The patent applies the merging principle by combining multiple functions into the elastic restoring members. These members simultaneously provide mechanical support for the movable platform, enable position restoration through elastic force, and transmit electrical signals between the movable platform and fixed frame. This consolidation reduces device complexity while maintaining reliable position restoration.
Solution Approach 2:
The elastic restoring members are designed with multi-functionality, serving as structural support elements, restoring mechanisms, and electrical signal transmission pathways. This universal design reduces the need for separate components, thereby improving reliability of position restoration without significantly increasing device complexity.
3Reliability
If multiple elastic restoring members are used to ensure stable position restoration, then the reliability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies segmentation by dividing the position restoration function into multiple elastic restoring members distributed between the fixed frame and movable platform. Each restoring member handles a portion of the restoration task, which reduces the precision requirements for individual members while collectively achieving stable and reliable position restoration through distributed functionality.
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
Enables precise adjustment of focus length and sampling position, improving the performance of image acquiring devices by allowing the movable platform to return to its original position effectively, enhancing signal quality and device accuracy.
Implementation Method 1
The first comb electrodes and the second comb electrodes are used to generate electrostatic force to cause the moveable platform to have movement along at least one direction with respect to the fixed frame
Implementation Method 2
The multiple elastic restoring members are formed between the fixed frame and another two opposite edges, different from the two opposite edges, of the rectangular shape of the moveable platform, and configured to restore a position of the moved moveable platform
Data Source
AI summary
A MEMS package including a fixed frame, a moveable platform and elastic restoring members is provided. The moveable platform is moved with respect to the fixed frame. The elastic restoring members are connected between the fixed frame and the moveable platform, and used to restore the moved moveable platform to an original position.