Optical Member Drive Assembly for Thin Long-Focal Cameras
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Solution Overview
Problem
Conventional consumer electronic devices with long focal length lenses face challenges in maintaining thinness due to increased thickness, necessitating an efficient optical member driving mechanism that can adjust the emission direction of light without compromising device thickness.
Innovation Solution
An optical member driving mechanism comprising a first movable portion connected to an optical member, a fixed portion, and a first driving assembly that includes a magnet and coil for relative movement, along with a second movable portion and driving assembly, utilizing guiding members and elastic connections to enable precise rotation and adjustment of the optical member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a lens with long focal length is disposed in the electronic device, then the photography or recording function is improved, but the thickness of the electronic device is increased
Solution Approach 1:
The optical system is divided into multiple segments: a fixed lens assembly and a movable lens assembly. The movable lens assembly can be independently actuated to adjust focus without requiring the entire optical system to be long, thereby maintaining thin device profile while achieving long focal length photography capability through segmented optical paths
Solution Approach 2:
The movable lens assembly is nested within the fixed lens assembly structure. The movable portion containing the lens is positioned inside the housing of the fixed portion, allowing the optical system to achieve extended focal length through internal movement rather than external extension, thus avoiding increased device thickness
2Measurement precision
If a first driving assembly and second driving assembly are used to drive the movable portion, then the adjustment precision of light emission direction is improved, but the device complexity is increased
Solution Approach 1:
The first driving assembly and second driving assembly use the same electromagnetic drive mechanism design, allowing a single standardized module to perform multiple functions: the first driving assembly adjusts the tilt angle while the second driving assembly adjusts the pan angle. This multi-functionality approach reduces overall system complexity despite having multiple drive units
Solution Approach 2:
Traditional mechanical gear or linkage systems for angular adjustment are replaced with electromagnetic driving assemblies. The electromagnetic actuators directly drive the movable lens assembly to achieve precise angular positioning without complex mechanical transmission mechanisms, simplifying the overall drive structure while improving adjustment precision
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 focus adjustment and light direction change within a compact form factor, reducing device thickness while ensuring smooth operation and minimizing friction and stray light, thereby enhancing the functionality and design of consumer electronic devices.
Implementation Method 1
the first driving assembly includes a magnet and a coil respectively disposed on the first movable portion and the fixed portion
Implementation Method 2
the optical member is configured to adjust a emission direction of light from an incident direction to an outgoing direction
Data Source
AI summary
An optical member driving mechanism is provided, including a first movable portion, a fixed portion, and a first driving assembly. The first movable portion is connected to an optical member. The first movable portion is movable relative to the fixed portion. The first driving assembly is configured to drive the first movable portion to move relative to the fixed portion.