Optical Element Drive Mechanism With Position Sensing and Impact Buffering
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Solution Overview
Problem
Existing optical element driving mechanisms in electronic devices, such as smartphones and digital cameras, face challenges in efficiently controlling the movement of optical elements like shutters to manage light exposure and prevent damage from external forces, while maintaining compactness and reliability.
Innovation Solution
The optical element driving mechanism incorporates a first movable part with an optical element that moves between positions, driven by a first driving assembly along a first axis, and includes sensing assemblies to determine the optical element's position, with a second driving assembly for locking the movable part in place, and a stopping assembly to limit motion and absorb impacts, utilizing different materials for bases with varying Young's moduli to enhance durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical element is made movable to control light exposure, then light management capability is improved, but the device becomes more complex and vulnerable to external forces
Solution Approach 1:
The device is divided into a fixed assembly (containing the driving assembly and sensing assembly) and a movable assembly (containing the optical element and stopping assembly). This segmentation allows the optical element to move independently for light control while the fixed assembly provides stable support and protection against external forces.
Solution Approach 2:
The stopping assembly is pre-configured with a buffering element that can absorb external forces before they reach the optical element. When the movable assembly moves beyond its normal range, the buffering element engages to prevent damage, providing beforehand protection against potential harm from external forces.
2Adaptability or versatility
If the optical element is positioned to shield the opening, then light exposure control is improved, but the device structure becomes more complex
Solution Approach 1:
The optical element is integrated with the movable assembly, combining the light-shielding function with the positioning mechanism. The movable assembly merges the optical element, driving interface, and stopping mechanism into a single unit that moves together to control light exposure.
Solution Approach 2:
The sensing assembly automatically detects the position of the movable assembly and provides feedback to the driving assembly, enabling self-regulated positioning. When the optical element reaches the desired position to shield the opening, the sensing assembly triggers the driving assembly to stop, eliminating the need for complex external control mechanisms.
3Volume of moving object
If the device is made compact, then device size is reduced, but the reliability of optical element positioning may deteriorate
Solution Approach 1:
The sensing assembly is nested within the fixed assembly, with the sensor and sensed element housed in a receiving space formed by the first base and second base. The movable assembly is nested within the housing, allowing all components to be compactly arranged while maintaining reliable positioning through the integrated sensing and driving mechanisms.
Data Source
AI summary
An optical element driving mechanism is provided and includes a first movable part, a fixed assembly and a first driving assembly. The first movable part includes an optical element, and the first movable part is movable relative to the fixed assembly. The first driving assembly is configured to drive the first movable part to move relative to the fixed assembly. The fixed assembly includes a first base and a second base arranged along a first axis, and the first movable part moves along the first axis.