Optical System Tilt Compensation via Electromagnetic Drive
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Solution Overview
Problem
Conventional electronic devices with camera modules face challenges in effectively compensating for both static and dynamic tilts caused by external shocks or mechanical tolerances, leading to image blurriness due to misalignment of the optical axis with the image-sensing element.
Innovation Solution
An optical system comprising a fixed module, a movable module, a sensing unit, and a driving assembly, where the sensing unit detects rotation angles and the driving assembly, powered by electromagnetic forces, adjusts the optical member holder to align with the image-sensing element, utilizing a coil and magnetic elements to generate forces perpendicular to the optical axis, allowing for both static and dynamic tilt compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional camera modules are used with basic auto focusing, then the device can capture images, but the images become blurry when the camera module vibrates due to external shock or impact
Solution Approach 1:
The patent replaces traditional mechanical shockproof mechanisms with an electromagnetic drive assembly that uses electromagnetic induction between coils and magnets to generate driving forces. This allows for more precise and responsive compensation of camera module vibrations caused by external shocks or impacts, thereby maintaining image quality stability without the limitations of mechanical systems.
Solution Approach 2:
The patent dynamically adjusts the driving forces generated by the electromagnetic drive assembly based on detected vibration parameters. By changing the magnitude and direction of electromagnetic forces in response to real-time vibration conditions, the system effectively counteracts vibration-induced blur and maintains reliable image quality under varying shock conditions.
2Adaptability or versatility
If electromagnetic induction is used for auto focusing and horizontal offset correction, then the lens position can be corrected, but the system cannot effectively compensate for complicated vibrations that are not simply vertical or horizontal
Solution Approach 1:
The patent extends the electromagnetic drive assembly to provide multi-directional vibration compensation beyond simple vertical and horizontal correction. By configuring coils and magnets to generate driving forces in multiple directions, the system achieves universal adaptability to compensate for complex vibrations from any direction, making the shockproof effect effective against complicated vibration patterns.
Solution Approach 2:
The patent transitions from two-dimensional (vertical and horizontal) vibration compensation to three-dimensional compensation by adding capability to correct tilts and vibrations in additional spatial dimensions. This dimensional expansion allows the system to handle complex vibration patterns that involve rotational components and multi-axis movements, significantly improving adaptability to real-world shock conditions.
3Manufacturing precision
If the optical axis is misaligned with the image-sensing element due to tilt, then image quality deteriorates, but conventional systems lack the capability to detect and correct such tilts
Solution Approach 1:
The patent incorporates a sensing unit that detects the tilt angle of the optical member holder and feeds this information back to the control system. Based on the detected tilt parameters, the electromagnetic drive assembly generates appropriate driving forces to rotate the optical member holder and realign the optical axis with the image-sensing element, achieving precise alignment through closed-loop feedback control.
Solution Approach 2:
The patent replaces traditional mechanical alignment mechanisms with an electromagnetic rotation system. The electromagnetic drive assembly uses electromagnetic forces to rotate the optical member holder for tilt compensation, providing more precise and controllable alignment adjustment compared to mechanical systems, while enabling accurate detection and correction of optical axis misalignment.
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 tilts, ensuring the optical axis alignment with the image-sensing element, thereby improving image quality by stabilizing the camera module against external shocks and mechanical tolerances.
Implementation Method 1
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
Data Source
AI summary
An optical system is provided and includes a fixed module, a movable module, a sensing unit and a driving assembly. The fixed module includes a base, 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 base and a second rotation angle of the optical member holder when rotating around a second axis relative to the base. The driving assembly includes a coil, the coil and the movable module are arranged along an optical axis of the optical member, and the coil is disposed around an opening of the base. The first axis or the second axis is perpendicular to the optical axis.