Micro Gimbal Camera Structure for 5-Axis Anti-Shake Control
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Solution Overview
Problem
Existing micro gimbal cameras in electronic devices can only prevent shaking of 4 degrees of freedom, failing to address the impact of shaking in the Rz direction, which degrades imaging quality, especially during night shooting and video recording.
Innovation Solution
A camera structure with a universal shaft, outer and inner gimbal supports, and gimbal carrier, equipped with a first and second driving mechanism, allowing the inner gimbal support to rotate relative to the outer support along two axes and the gimbal carrier to rotate relative to the inner support along a third axis, independently addressing Rz axis shake, thereby forming a 5-axis anti-shake system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional micro gimbal camera structure is used, then the device complexity is low, but the anti-shake performance is insufficient (only 4 degrees of freedom)
Solution Approach 1:
The gimbal system is segmented into multiple independent rotational mechanisms: an outer gimbal supporting the camera module and an inner gimbal supporting the flash module, with each capable of independent rotation. This segmentation allows each component to address specific shaking directions separately, achieving comprehensive 5-degree-of-freedom anti-shake while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The inner gimbal structure is nested within the outer gimbal structure, where the inner gimbal support rotates along with the outer gimbal's rotation. This nested configuration allows the flash module to be positioned independently while the camera module maintains its anti-shake capability, enabling the system to compensate for shaking in multiple directions without requiring a completely separate mechanism for each function.
2Adaptability or versatility
If the camera module and flash module share the same gimbal support, then the device complexity is reduced, but the independence of anti-shake control is compromised
Solution Approach 1:
The gimbal system is divided into separate support structures: the outer gimbal support specifically for the camera module and the inner gimbal support for the flash module. This segmentation enables independent rotational control of each module, allowing the camera to maintain precise anti-shake performance while the flash can be independently positioned, thereby achieving adaptability without excessive complexity through clear functional separation.
3Manufacturing precision
If only 4 degrees of freedom anti-shake is implemented, then the device complexity remains low, but the imaging quality during night shooting and video recording deteriorates
Solution Approach 1:
The system transitions from traditional 4-degree-of-freedom anti-shake to 5-degree-of-freedom by adding the inner gimbal's rotation along a third axis. This dimensional extension allows compensation for shaking in the Rz direction (rotation around the optical axis) in addition to the conventional three translational and one rotational direction, thereby improving imaging quality for night shooting and video recording while maintaining reasonable system complexity through efficient use of rotational mechanisms.
Data Source
AI summary
A camera structure includes a universal shaft, an outer gimbal support, an inner gimbal support, a gimbal carrier, a first driving mechanism, a second driving mechanism, and a camera module. The camera module is movably connected to the outer gimbal support, and the camera module is fixedly connected to the gimbal carrier. Two supporting portions of the universal shaft that are axially distributed along a first axis are hinged to the outer gimbal support, and two supporting portions of the universal shaft that are axially distributed along a second axis are hinged to the inner gimbal support. The first driving mechanism is configured to drive the inner gimbal support to rotate relative to the outer gimbal support along the first axis and/or the second axis. The second driving mechanism is configured to drive the gimbal carrier to rotate relative to the inner gimbal support along a third axis.