Prism Driver Magnetic Suspension for Compact OIS
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Solution Overview
Problem
Existing prism driving devices in electronic cameras require a large space due to multiple elastic pieces, which are prone to fracture, leading to failures in optical image stabilization.
Innovation Solution
A prism driving device with a housing assembly, angle-adjustable prism holder, and electromagnetic driving assembly, utilizing a support protrusion and groove for universal movement without the need for multiple elastic pieces, ensuring miniaturization and preventing fractures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple elastic pieces are disposed below the holder to prevent prism shaking, then the optical image stabilization function is achieved, but the prism driving device requires a relatively large space and is difficult to miniaturize
Solution Approach 1:
The patent extracts and eliminates the elastic pieces from the prism driving device structure. Instead of using multiple elastic pieces to prevent prism shaking, the invention uses a magnetic suspension mechanism where the prism holder is magnetically suspended above the housing assembly, eliminating the need for elastic pieces while maintaining the optical image stabilization function and enabling miniaturization.
Solution Approach 2:
The patent replaces the mechanical elastic piece-based suspension system with an electromagnetic magnetic suspension system. The magnetic attraction force between the magnet portion and coil portion substitutes for the mechanical function of elastic pieces in holding and stabilizing the prism, allowing for a more compact design without sacrificing reliability.
2Reliability
If multiple elastic pieces are used to support the holder, then the optical image stabilization function is achieved, but the elastic pieces are easy to fracture during use leading to functional failure
Solution Approach 1:
The patent removes the elastic pieces entirely from the system, eliminating the source of fracture failures. The magnetic suspension mechanism provides a more durable support system that does not suffer from the inherent fragility of elastic pieces, thereby improving reliability and preventing functional failure due to fracture.
Solution Approach 2:
The patent replaces the mechanical elastic piece system with an electromagnetic system that uses magnetic attraction forces. This substitution eliminates the fracture problem associated with elastic pieces, as magnetic fields do not have physical boundaries that can break, thereby significantly improving the strength and durability of the optical image stabilization function.
3Volume of moving object
If a compact design is implemented to reduce device size, then miniaturization is achieved, but the support protrusion and groove may be prone to fracture
Solution Approach 1:
The patent replaces the mechanical support protrusion and groove structure with a magnetic suspension mechanism. The magnetic attraction force between the magnet portion and coil portion provides the necessary support without requiring physical contact between protrusions and grooves, thereby eliminating the fracture risk associated with compact mechanical structures while maintaining miniaturization.
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 solution allows for a compact design that maintains optical image stabilization functionality while preventing the prism holder from shaking, ensuring reliability and reducing the risk of mechanical failure.
Implementation Method 1
The electromagnetic driving assembly includes a magnet portion and a coil portion disposed opposite to the magnet portion. One of the magnet portion or the coil portion is disposed on the prism holder, the other one is disposed on the housing assembly, and the electromagnetic driving assembly is configured to adjust a tilt angle of the prism holder.
Implementation Method 2
One of the housing assembly or the prism holder is provided with a support protrusion, and the other of the housing assembly and the prism is provided with a groove. At least a portion of the support protrusion is magnetically sucked into the groove, and the prism holder is capable of being universally moved relative to the housing assembly through the support protrusion and the groove which are in contact with each other.
Data Source
AI summary
Provided is a prism driving device. The prism driving device includes a housing assembly, a prism holder disposed on the housing assembly in an angle adjustable manner, and an electromagnetic driving assembly. The electromagnetic driving assembly includes a magnet portion and a coil portion disposed opposite the magnet portion, where one of the magnet portion or the coil portion is disposed on the prism holder, the other one is disposed on the housing assembly, and the electromagnetic driving assembly is configured to adjust a tilt angle of the prism holder. One of the housing assembly or the prism holder is provided with a support protrusion and the other is provided with a groove, and at least a portion of the support protrusion is magnetically sucked into the groove.