Folded-Path Optical Lens Drive for Compact Image Stabilization
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Solution Overview
Problem
Electronic devices with lens modules suffer from image blurriness due to device shaking, necessitating a vibration-proof lens module to maintain image quality.
Innovation Solution
A lens driving module with electromagnetic driving assemblies positioned at different heights and orientations, utilizing rolling elements and aligning elements to stabilize the optical lens, reducing electromagnetic interference and overall volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibration-proof lens module is implemented to prevent image blurriness from device shaking, then image quality and stability are improved, but device complexity and volume increase
Solution Approach 1:
The lens module is divided into separate functional components: a holder for the optical lens, a reflective element (prism) for optical path folding, and electromagnetic driving assemblies positioned at different locations. This segmentation allows each component to perform its specific function independently, achieving vibration compensation without requiring a completely redesigned complex system.
Solution Approach 2:
The patent introduces a reflective element (prism) that folds the optical path, effectively using a third dimension (vertical height) to redirect light. This allows the optical system to achieve compact horizontal layout while maintaining the necessary optical path length, and enables electromagnetic driving assemblies to be positioned at different heights for effective vibration compensation.
2Object-generated harmful factors
If electromagnetic driving assemblies are positioned at different heights to reduce interference, then electromagnetic interference is reduced, but device volume increases
Solution Approach 1:
Electromagnetic driving assemblies are positioned at different vertical heights within the lens module structure. The first electromagnetic driving assembly is positioned at a first height and the second electromagnetic driving assembly is positioned at a second height different from the first height. This vertical separation in the third dimension effectively reduces electromagnetic interference between the assemblies while maintaining a compact overall device volume.
3Volume of stationary object
If the optical path is folded by a reflective element, then the device volume is reduced, but manufacturing precision requirements increase
Solution Approach 1:
A reflective element (prism) is introduced to fold the optical path, redirecting light from the incident direction to a different direction. This allows the optical system to achieve a compact horizontal layout by utilizing the vertical dimension, thereby reducing the overall device volume. The prism is precisely positioned and oriented to ensure accurate optical path folding while maintaining 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
Achieves effective optical image stabilization and auto-focusing while minimizing device size and interference, enhancing image quality and stability.
Implementation Method 1
a driving assembly, and a metal sheet. The driving assembly is configured to drive the movable portion to move
Implementation Method 2
utilizing rolling elements and aligning elements to stabilize the optical lens
Data Source
AI summary
An optical element driving mechanism is provided. The optical element driving mechanism includes a movable portion, a fixed portion, a driving assembly, and a metal sheet. The movable portion is configured to connect an optical element having an optical axis. The optical element is configured to correspond to a light that travels along an incident direction and is turned to a first direction by a reflective element. The fixed portion includes a base, and the movable portion is movable relative to the fixed portion. The driving assembly is configured to drive the movable portion to move. The metal sheet is disposed on the base. When viewed in the incident direction, the metal sheet at least partially overlaps with the optical axis.