Multi-Axis Optical Image Stabilization System
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Solution Overview
Problem
Conventional electronic devices with camera modules face challenges in effectively compensating for complex vibrations, leading to image blurring due to external shocks or impacts, as existing auto-focusing and optical image stabilization systems are inadequate in addressing vertical and horizontal vibrations simultaneously.
Innovation Solution
An optical system comprising a fixed module, a movable module, a driving coil, a sensing unit, and a control unit, which includes magnetic elements and sensors to detect and correct tilts around multiple axes, ensuring the optical axis alignment with the image-sensing element, thereby stabilizing the camera module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional auto-focusing and optical image stabilization systems are used, then the camera module can compensate for simple vertical and horizontal vibrations, but the system cannot effectively handle complex multi-axis tilts and rotations caused by external shocks
Solution Approach 1:
The patent divides the vibration compensation into multiple independent axes (first axis and second axis perpendicular to the optical axis). The driving assembly includes multiple driving coils that can independently drive the optical member holder to rotate around different axes, allowing the system to handle complex multi-axis tilts by combining simple single-axis compensation actions.
Solution Approach 2:
The patent introduces rotation around axes perpendicular to the optical axis (first axis and second axis), adding new degrees of freedom to the traditional auto-focusing system. This dimensional expansion enables the system to compensate for tilts and rotations in multiple directions, transforming a one-dimensional (optical axis only) compensation system into a multi-dimensional system that can handle complex vibrations.
2Productivity
If the optical member holder is made movable to enable auto-focusing, then the focusing function is improved, but the camera module becomes more susceptible to vibration and shock
Solution Approach 1:
The patent incorporates a sensing unit that detects the position and tilt of the optical member holder in real-time. Based on this feedback, the control unit adjusts the driving coils to compensate for vibrations and shocks, creating a closed-loop system that maintains optical alignment while allowing the holder to move for auto-focusing.
Solution Approach 2:
The patent makes the optical member holder dynamically adjustable through the driving assembly with multiple driving coils. The system can dynamically switch between different operating modes (focusing mode, stabilization mode, and compensation mode) to balance the auto-focusing function with vibration resistance based on real-time conditions.
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 optical system effectively compensates for both static and dynamic tilts, ensuring clear images by aligning the optical axis with the image-sensing element, enhancing the shockproof effect and image quality.
Implementation Method 1
When the auto focusing function is executed, a current is supplied to the coil, and electromagnetic induction occurs between the coil and the corresponding magnets, so that a lens holder affixed to the coil is moved along an optical axis
Implementation Method 2
The sensing unit is configured to obtain information related to a first rotation angle of the optical member holder when rotating around a first axis relative to the outer frame and a second rotation angle of the optical member holder when rotating around a second axis
Data Source
AI summary
An optical system is provided and includes a fixed module, a movable module, a driving coil, a sensing unit and a driving assembly. The fixed module includes an outer frame, and the movable module includes an optical member holder, configured to hold an optical member. The sensing unit is configured to obtain information related to a first rotation angle of the optical member holder when rotating around a first axis relative to the outer frame and a second rotation angle of the optical member holder when rotating around a second axis relative to the outer frame. The driving assembly is for driving the optical member holder to rotate around the first axis or the second axis according to the information related to the first rotation angle and the second rotation angle. The first axis or the second axis is perpendicular to an optical axis of the optical member.