Optical Element Drive Mechanism With Contact-Based Position Sensing
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Solution Overview
Problem
Existing optical element driving mechanisms require position sensing components like Hall sensors and magnets, which increase manufacturing costs and hinder miniaturization, while also being less accurate in determining the position of movable parts.
Innovation Solution
An optical element driving mechanism with a movable part and a fixed assembly, where the movable part includes a magnetically conductive material and an electrical conductive member that connects to different circuit assemblies based on its position, allowing an external control circuit to determine its position without the need for position sensing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If position sensing components like Hall sensors and magnets are used, then the position of movable parts can be determined, but manufacturing costs increase and device size increases
Solution Approach 1:
The patent extracts and eliminates the position sensing components (Hall sensors and magnets) from the optical element driving mechanism. Instead of using these separate sensing components, the invention uses the existing electrical conductive member that connects to different circuit assemblies based on position, thereby removing unnecessary components and reducing device complexity while maintaining position determination capability
Solution Approach 2:
The electrical conductive member is designed to serve dual functions: it acts as both an electrical connection component and a position sensing element. By connecting to different circuit assemblies (first circuit assembly or second circuit assembly) depending on its position, it provides position information without requiring separate sensing components, thus reducing overall device complexity
2Measurement precision
If position sensing components like Hall sensors and magnets are used, then the position of movable parts can be determined, but manufacturing costs increase
Solution Approach 1:
The patent removes the expensive position sensing components (Hall sensors and magnets) from the manufacturing process. The position determination is achieved through the existing electrical conductive member's connection to different circuit assemblies, eliminating the need to manufacture and assemble separate sensing components, thereby reducing manufacturing costs
Solution Approach 2:
The invention uses simple electrical conductive members with spring portions that can be easily manufactured and replaced if needed, rather than expensive Hall sensors. The spring portion provides reliable electrical connection and position indication through simple contact with different circuit assemblies, offering a cost-effective solution
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 solution enables accurate position sensing of the movable part without additional sensing components, reduces manufacturing costs, and facilitates miniaturization by eliminating the need for Hall sensors and magnets.
Implementation Method 1
the movable part includes a magnetically conductive material and an electrical conductive member... the electrical conductive member is configured to be electrically connected to the first circuit assembly... electrically connected to the second circuit assembly
Data Source
AI summary
The present disclosure provides an optical element driving mechanism, which includes a movable part, a fixed assembly, and a driving assembly. The movable part is configured to be connected to an optical element. The fixed assembly has a first opening, and the movable part is movable relative to the fixed assembly along a first axis. The driving assembly is configured to drive the movable part to move between a first position and a second position relative to the fixed assembly, so that the optical element selectively overlaps the first opening.