Optical Element Driving Unit With Embedded Magnetic Field Guide
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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 connection, allowing for compact and efficient movement of optical elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional camera modules include driving mechanisms for optical elements, then optical functionalities (auto focus, optical image stabilization, optical zoom) are achieved, but the structure becomes more complex and the size increases
Solution Approach 1:
The patent combines the driving mechanism and supporting mechanism into an integrated structure. The electromagnetic driving assembly (including driving coil, driving magnet, and ferromagnetic element) is merged with the carrier that holds optical elements, eliminating the need for separate driving mechanisms and reducing overall structural complexity while maintaining auto focus and optical image stabilization functionalities.
Solution Approach 2:
The carrier is designed to serve multiple functions: it holds optical elements, provides electromagnetic coupling for driving, and enables both auto focus and optical image stabilization through its degrees of freedom. This multi-functional design reduces the need for separate components for each optical functionality, thereby reducing structural complexity.
2Adaptability or versatility
If conventional camera modules include driving mechanisms for optical elements, then optical functionalities are achieved, but the size of camera modules increases
Solution Approach 1:
The electromagnetic driving assembly is integrated into the carrier structure, which itself is part of the compact optical lens system. This merging eliminates the need for additional space for separate driving mechanisms, enabling compact camera module design while maintaining auto focus and optical zoom functionalities.
Solution Approach 2:
The patent replaces traditional mechanical driving mechanisms with an electromagnetic driving assembly that uses electromagnetic coupling between the driving coil, driving magnet, and ferromagnetic element. This substitution eliminates the need for complex mechanical linkages and reduces the space required for driving mechanisms, enabling miniaturization of the camera module.
3Volume of moving object
If storage space is limited in optical lens system, then miniaturization is achieved, but insufficient space remains for installing driving mechanism
Solution Approach 1:
The electromagnetic driving assembly components (driving coil, driving magnet, ferromagnetic element) are nested within the carrier structure and optical lens system. The ferromagnetic element is embedded in the carrier, and the driving coil is disposed on the carrier, creating a nested arrangement that maximizes space utilization and enables miniaturization while providing sufficient space for the driving mechanism.
Solution Approach 2:
By replacing mechanical driving mechanisms with an electromagnetic system that uses magnetic coupling and electromagnetic induction, the patent eliminates the need for complex mechanical linkages and reduces the space required for installing driving mechanisms, thereby enabling miniaturization of the optical lens system.
4Volume of moving object
If storage space is limited in optical lens system, then miniaturization is achieved, but insufficient space remains for installing driving mechanism to provide effective driving force
Solution Approach 1:
The patent replaces mechanical force transmission with electromagnetic force generation. The electromagnetic driving assembly uses electromagnetic induction and magnetic coupling to generate driving force directly, eliminating the need for mechanical linkages and reducing space requirements while maintaining effective driving force for moving optical elements.
Solution Approach 2:
The patent optimizes the parameters of the electromagnetic driving assembly (such as the strength and distribution of magnetic fields, the configuration of the ferromagnetic element, and the electrical characteristics of the driving coil) to maximize driving force within the limited space of the miniaturized optical lens system.
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 compact optical systems with improved image quality by providing a robust and efficient driving mechanism that minimizes component count and assembly complexity, while maintaining the required degrees of freedom for optical elements.
Implementation Method 1
The electromagnetic driving assembly is configured to move the carrier relative to the stationary body. The electromagnetic driving assembly includes a driving coil, a driving magnet and a ferromagnetic element.
Implementation Method 2
The ferromagnetic element is one-piece formed and includes a magnetic field guiding part and a first electrical connection part. The magnetic field guiding part faces at least one of the driving coil and the driving magnet.
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.