Optical Member Drive Structure for Variable Back Focal Lengths
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Solution Overview
Problem
Existing optical member driving mechanisms in electronic devices face challenges in accommodating optical members with varying back focal lengths without increasing device thickness, and ensuring stable and precise movement for functions like focusing, zooming, and optical image stabilization.
Innovation Solution
An optical member driving mechanism with a movable portion, fixed portion, and driving assembly, featuring a driving source, amplifying member, and guiding members, which allows for the optical member to move relative to the fixed portion, ensuring compatibility with different back focal lengths and providing stable movement through a longitudinal structure and guiding assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical member driving mechanism is designed to accommodate optical members with varying back focal lengths, then the adaptability is improved, but the device thickness increases
Solution Approach 1:
The patent employs a movable portion that can dynamically adjust its position along the optical axis to accommodate optical members with different back focal lengths. The driving assembly enables the movable portion to move between different positions, allowing the mechanism to adapt to varying optical requirements without increasing the overall device thickness. This dynamic adjustment capability resolves the contradiction between adaptability and compactness.
Solution Approach 2:
The patent implements a nested structure where the movable portion is disposed within the housing, and the driving assembly is integrated into the movable portion or housing. The guiding members are positioned within the housing to guide the movable portion's movement. This nesting arrangement allows multiple functional components to occupy overlapping spatial volumes, enabling the mechanism to accommodate varying back focal lengths while maintaining a compact overall thickness.
2Length of stationary object
If the movable portion is positioned closer to the light-entering side to reduce device thickness, then the device thickness is reduced, but the structural stability deteriorates
Solution Approach 1:
The patent employs asymmetric positioning of the movable portion within the housing, where the distance from the movable portion to the light-entering side is different from the distance to the light-exiting side. This asymmetric arrangement allows the movable portion to be positioned optimally for compactness while the guiding members and driving assembly provide structural support to maintain stability. The asymmetric design enables the mechanism to achieve both reduced thickness and maintained structural integrity.
3Length of stationary object
If the driving assembly is positioned closer to the light-entering side to reduce device thickness, then the device thickness is reduced, but the ease of assembly deteriorates
Solution Approach 1:
The patent divides the optical member driving mechanism into distinct modular segments: the housing, the movable portion, the driving assembly, and the guiding members. Each segment can be independently manufactured and then assembled together. The driving assembly is configured as a separate module that can be positioned at different locations along the optical axis depending on the specific application requirements, allowing for flexible assembly while maintaining compact dimensions.
Data Source
AI summary
An optical member driving mechanism is provided. The optical member driving mechanism includes a movable portion, a fixed portion, and a driving assembly. The movable portion is configured to connect an optical member, and the movable portion is movable relative to the fixed portion. The driving assembly is configured to drive the movable portion to move.