Stabilizing-Focusing Motor Structure for Compact Multi-Axis Camera Modules
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Solution Overview
Problem
Existing camera modules in compact mobile devices suffer from image blurs and drifts due to external vibrations, particularly in intense vibration or low-light scenarios, with existing stabilization techniques having limitations in cost, size, power consumption, and stabilization effectiveness.
Innovation Solution
A stabilizing-focusing motor with a structure comprising an outer ball holder, inner ball holder, stabilizing magnet, stabilizing coil, and circuit board, along with a focusing structure including a second magnet holder, lens carrier, focusing magnet, focusing coil, and circuit board, utilizing electromagnetic forces for stabilization and focusing, enabling multi-axis movement and low-power, compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If OIS (Optical Image Stabilizer) is used to shift optical component with actuator, then image quality is improved through optical stabilizing compensations, but device size and weight increase due to heavy lens movement mechanism
Solution Approach 1:
The patent replaces the traditional mechanical OIS system with an electromagnetic driving system. The electromagnetic motor uses magnetic fields generated by coils to drive the lens module, eliminating the need for heavy mechanical actuators and moving parts. This substitution maintains the optical stabilizing function while significantly reducing the weight of moving components.
Solution Approach 2:
The electromagnetic motor structure serves multiple functions: it acts as both the stabilization actuator and the focusing actuator. The same electromagnetic driving mechanism controls both the stabilizing movement and focusing movement of the lens module, reducing overall device complexity and weight compared to having separate mechanical systems for each function.
2Reliability
If SSS (Sensor-Shift Stabilizer) is used to shift image sensor with actuator, then stabilization effect is improved with better high-frequency response and power consumption, but device complexity increases
Solution Approach 1:
The patent merges the stabilization function and focusing function into a single integrated electromagnetic motor system. Both the stabilizing movement and focusing movement of the lens module are controlled by the same electromagnetic driving mechanism, reducing device complexity while maintaining effective stabilization performance.
3Reliability
If mainstream GS (Gimbal Stabilizer) is used to mechanically drive whole camera module, then stabilization effect and image quality are improved, but manufacturing cost and device size increase
Solution Approach 1:
The patent replaces complex mechanical gimbal structures with an electromagnetic driving system. The electromagnetic motor uses magnetic field interactions to control lens movement, eliminating the need for mechanical gimbals, bearings, and associated mechanical components. This substitution significantly reduces manufacturing cost and device size while maintaining stabilization effectiveness.
Solution Approach 2:
The patent changes the fundamental operating principle from mechanical drive to electromagnetic drive. By using electromagnetic forces instead of mechanical forces, the system achieves the same stabilization function with reduced size, lower cost, and fewer moving parts.
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 provides effective stabilization and focusing with a simple, compact, and cost-efficient design, supporting multi-axis movement, reducing manufacturing costs and power consumption while ensuring quick and accurate focusing.
Implementation Method 1
the stabilizing coil is provided on the outer ball holder, and opposite to the stabilizing magnet
Implementation Method 2
the focusing coil is provided on the lens carrier
Data Source
AI summary
The present disclosure relates to a technical field of camera modules, and in particular to a stabilizing-focusing motor and an application module thereof. The stabilizing-focusing motor includes a stabilizing structure and a focusing structure, where the stabilizing structure includes an outer ball holder, an inner ball holder, balls, a stabilizing magnet, a stabilizing coil, and a stabilizing circuit board; and the focusing structure includes a second magnet holder, a lens carrier, a connecting spring, a focusing magnet, a focusing coil, and a focusing circuit board. The present disclosure can provide a multi-axis degree of freedom (DOF), reduce a power consumption and a size of a micro gimbal stabilizer (MGS) camera module, lessen impacts of an attitude error on stabilization performance, make assembly less difficult, and increase a maximum stabilizing angle.