Dual-Axis Optical Unit for Camera Shake Correction
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Solution Overview
Problem
Conventional prism devices can only correct the orientation of a camera module about one support shaft, making it difficult to effectively suppress image blur caused by camera shake in multiple directions.
Innovation Solution
An optical unit with a holder and support portions that allow the optical element to swing about two intersecting axes, utilizing magnetic mechanisms for precise adjustment, enabling correction of the optical element's orientation in both pitching and rolling axes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional prism device uses only one support shaft for orientation correction, then the device complexity is reduced, but the image stabilization effectiveness deteriorates because it cannot suppress image blur in multiple directions
Solution Approach 1:
The patent transitions from a single-axis rotation system to a dual-axis swing system. The optical element can now swing about a first swing axis and a second swing axis that intersects the first axis, adding a new dimension of motion. This enables correction of image blur in multiple directions (both pitching and rolling axes) rather than being limited to one direction, thereby improving image stabilization effectiveness without excessive complexity increase
2Ease of operation
If the optical element is fixed in orientation, then the device complexity is minimized, but the ability to correct camera shake deteriorates
Solution Approach 1:
The patent introduces dynamic swing mechanisms that allow the optical element to change its orientation relative to the camera module. The holder can swing about a first swing axis and the first support portion can swing about a second swing axis, enabling real-time adjustment of the optical element's orientation to counteract camera shake. This dynamic capability provides effective orientation correction while maintaining reasonable device complexity through controlled degrees of freedom
3Adaptability or versatility
If a single-axis swing mechanism is used, then the device complexity is reduced, but the adaptability to different camera shake directions deteriorates
Solution Approach 1:
The patent extends the swing capability from one dimension (single axis) to two dimensions by introducing a second swing axis that intersects the first axis. This dual-axis configuration enables the optical element to adapt to camera shake occurring in multiple directions - both along the first swing axis and the second swing axis. The system achieves broader adaptability to different camera shake directions by adding another dimension of motion freedom
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
This design improves the accuracy of image stabilization by allowing the optical element to be corrected in more directions, effectively reducing image blur caused by camera shake.
Implementation Method 1
The first swing mechanism includes a first magnet and a first coil. The first magnet is arranged on the holder. The first coil is arranged on the second support portion.
Implementation Method 2
The second swing mechanism includes a second magnet and a second coil. The second magnet is arranged on the first support portion. The second coil is arranged on the second support portion.
Data Source
AI summary
An optical unit includes an optical element, a holder, a first support portion, a second support portion, a first swing mechanism, and a second swing mechanism. The holder holds the optical element. The first support portion supports the holder so as to be swingable about a first swing axis. The second support portion supports the first support portion so as to be swingable about the second swing axis. The second swing mechanism includes a second magnet and a second coil. The second magnet is arranged on the first support portion. The second coil is arranged on the second support portion.