Optical Element Driving Unit With Embedded Ferromagnetic Carrier
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Solution Overview
Problem
Conventional optical systems struggle to achieve both high image quality and compactness, as the complexity and size of camera modules increase to accommodate driving mechanisms for optical elements, compromising miniaturization.
Innovation Solution
An optical element driving unit featuring a stationary body, a carrier with degrees of freedom, a supporting mechanism, and an electromagnetic driving assembly with a driving coil, magnet, and ferromagnetic element, which guides magnetic fields and provides electrical connections to minimize component count and enhance manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional camera modules include driving mechanisms for auto focus, optical image stabilization and optical zoom, then the functionalities are achieved, but the structure becomes more complex and the size increases
Solution Approach 1:
The patent combines multiple driving mechanisms into a single integrated electromagnetic driving assembly that can drive different optical elements (lens for auto focus, prism for optical image stabilization, and lens groups for optical zoom) simultaneously or independently, reducing structural complexity while maintaining all required functionalities
Solution Approach 2:
The electromagnetic driving assembly is designed as a universal driving mechanism that can perform multiple functions (auto focus, optical image stabilization, optical zoom) through a single device structure, eliminating the need for separate dedicated driving mechanisms for each function
2Adaptability or versatility
If conventional camera modules include driving mechanisms for optical elements, then the functionalities are achieved, but the size of the camera module and electronic device increases
Solution Approach 1:
Multiple driving mechanisms are merged into a compact electromagnetic driving assembly that occupies minimal space while providing all necessary driving functions for auto focus, optical image stabilization, and optical zoom through integrated coil and magnet structures
Solution Approach 2:
Traditional mechanical driving mechanisms (motors, gears, linkages) are replaced with an electromagnetic driving system that uses magnetic fields generated by coils to directly actuate optical elements, eliminating complex mechanical transmission components and significantly reducing the overall size
3Force
If the storage space for driving mechanism is increased to accommodate effective driving force, then the driving capability is improved, but the miniaturization requirement is compromised
Solution Approach 1:
The electromagnetic driving assembly optimizes the magnetic field strength and distribution by adjusting coil parameters (turns, current density) and magnet configurations (strength, geometry, positioning) to generate sufficient driving force within a minimal volume, achieving high force density through parameter optimization
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
The solution enables efficient movement of optical elements within a compact space, improving the design flexibility and manufacturing efficiency of optical systems while maintaining high image quality.
Implementation Method 1
an electromagnetic driving assembly (37) is configured to move the carrier (33) relative to the stationary body (31)... The electromagnetic driving assembly includes a driving coil (371), a driving magnet (373) and a ferromagnetic element (375)
Implementation Method 2
The ferromagnetic element (375) is one-piece formed and includes a magnetic field guiding part (3751)... The magnetic field guiding part (3751) faces at least one of the driving coil (371) and the driving magnet (373)
Data Source
AI summary
An optical element driving unit includes a stationary body, a carrier, a supporting mechanism and an electromagnetic driving assembly. The supporting mechanism is connected to the carrier and the stationary body and provides the carrier with a degree of freedom of movement relative to the stationary body. The carrier can be driven to move by the electromagnetic driving assembly. The electromagnetic driving assembly includes a driving coil, a driving magnet and a ferromagnetic element. The driving coil is disposed on the carrier. The driving magnet is disposed on the stationary body. The ferromagnetic element is one-piece formed and embedded in the carrier, and the ferromagnetic element includes a magnetic field guiding part and an electrical connection part. The magnetic field guiding part faces the driving coil and/or the driving magnet. The electrical connection part is exposed on a surface of the carrier and electrically connected to the driving coil.