Lens Driving Device Electromagnetic Stabilization
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Solution Overview
Problem
Lens driving devices with optical image stabilization functions struggle to maintain a stable optical axis when used by hand, leading to poor imaging effects due to hand-shaking-induced deviations.
Innovation Solution
A lens driving device that incorporates a housing with a lens assembly, a shell connected via a clip, and a first driving structure comprising magnets and coils arranged in an arc-shaped rail with balls to facilitate rotation around the optical axis, utilizing electromagnetic forces to stabilize the lens module and adjust for hand movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a lens driving device with optical image stabilization function is used, then the lens can be stabilized during photography, but the device cannot avoid swaying due to hand shaking, causing the optical axis to continuously deviate
Solution Approach 1:
The patent replaces the traditional mechanical stabilization mechanism with an electromagnetic driving structure. The electromagnetic actuator uses magnetic fields and electrical currents to drive the lens assembly, eliminating mechanical contact points that would transmit hand shaking vibrations. This substitution allows for smoother, vibration-free lens movement while maintaining optical axis stability during hand-held photography.
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary between the control system and the lens assembly. Instead of direct mechanical coupling, the electromagnetic actuator converts electrical signals into precise lens positioning through magnetic field interaction. This intermediary mechanism isolates the lens system from mechanical vibrations caused by hand shaking, achieving stable optical axis during operation.
2Manufacturing precision
If the lens assembly is made rotatable around the optical axis to compensate for hand shaking, then imaging quality improves, but the device complexity increases
Solution Approach 1:
The electromagnetic driving structure serves multiple functions simultaneously: it provides rotational driving torque around the optical axis, enables precise angular positioning, and compensates for hand shaking vibrations. By integrating these functions into a single actuator system rather than using separate mechanisms for each function, the patent reduces overall device complexity while achieving high imaging quality through optical axis stabilization.
Solution Approach 2:
The patent controls the rotational position of the lens assembly by dynamically adjusting electrical parameters (current magnitude and direction) to the electromagnetic actuator. Instead of complex mechanical positioning mechanisms, the system achieves precise angular control through electrical parameter modulation, simplifying the driving structure while maintaining high imaging quality through accurate optical axis compensation.
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 device effectively stabilizes the lens module by rotating it around the optical axis, reducing the impact of hand movement and enhancing image quality through precise adjustment of the optical axis, thereby improving imaging effects.
Implementation Method 1
an electromagnetic acting force is generated between the magnet and the coil so that the lens assembly rotates around the optical axis direction thereof
Implementation Method 2
the ball can roll in the arc-shaped rail
Data Source
AI summary
The present invention provides a lens driving device and an electronic device, wherein the lens driving device comprises a housing and a lens assembly; the lens assembly includes a lens module and a shell for accommodating the lens module; a bottom wall of the housing is formed an arc-shaped rail; the lens driving device further includes a ball disposed between the housing and the shell and located in the arc-shaped rail; a first driving structure for driving the lens assembly to rotate around an optical axis is further arranged between the housing and the shell; and the first driving structure includes a magnet and a coil opposite to the magnet. The present invention realizes rotation of the lens module around the optical axis direction, thus avoiding the swaying of the lens driving device caused by hand movement, achieving image stabilization, and improving the imaging effect of the lens module.