Blade Driving Device with Electromagnetic Actuation for Aperture Control
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Solution Overview
Problem
Conventional blade and lens driving devices in portable electronic devices face challenges in light adjustment and proper lens movement due to fixed apertures and shutters, which hinder image quality and lens focusing, especially when correcting image shake.
Innovation Solution
The proposed solution involves a blade driving device with a rotating mechanism using a rod part and a wound coil interacting with a driving magnet, and a lens driving device with electromagnetic coils and magnet steels, allowing independent movement of the blade and lens for focusing and image stabilization without additional power traces, thus enabling effective light adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the aperture and shutter are made to move together with the lens for light adjustment, then light amount adjustment is improved, but the fixed aperture and shutter cannot properly perform light amount adjustment by movement of the lens driving device
Solution Approach 1:
The patent divides the blade driving device into independent components: the blade assembly (aperture/shutter) and the lens driving assembly. The blade is driven by a separate blade driving device with its own driving magnet and wound coil, while the lens is driven by a lens driving device with its own driving magnets and coils. This segmentation allows the blade and lens to move independently, enabling proper light amount adjustment through blade movement without being hindered by lens movement requirements.
2Use of energy by moving object
If a trace mechanism is added to supply power to the mobile aperture or shutter, then light adjustment capability is improved, but the trace mechanism hinders the action of the lens driving device
Solution Approach 1:
The patent replaces the mechanical trace mechanism with an electromagnetic driving system. The blade driving device uses a wound coil and driving magnet to generate electromagnetic force, which directly drives the blade without requiring any mechanical trace or contact mechanism. This substitution eliminates the hindering trace mechanism while providing sufficient power supply to the mobile blade through non-contact electromagnetic interaction.
3Ease of operation
If the driving portion of the blade driving device is added, then blade driving capability is improved, but the center of gravity of the lens driving device changes and it may not perform appropriate lens driving
Solution Approach 1:
The patent separates the blade driving function and lens driving function into distinct devices: the blade driving device with its driving magnet and wound coil, and the lens driving device with its own driving magnets and coils. By segmenting the driving systems, each device can be optimized independently for its specific function without interfering with the other, maintaining lens driving precision while providing effective blade driving capability.
Solution Approach 2:
The patent applies different driving mechanisms to different parts of the system: the blade driving device uses a wound coil and driving magnet configuration optimized for blade movement, while the lens driving device uses separate driving magnets and coils optimized for lens movement. This local optimization ensures that each component performs its specific function with high precision without being compromised by the requirements of other components.
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 enhances image quality by allowing precise light adjustment and improved lens movement without hindering the lens driving mechanism, effectively addressing the limitations of conventional devices.
Implementation Method 1
a wound coil interacting with a driving magnet
Implementation Method 2
lens driving device with electromagnetic coils and magnet steels, allowing independent movement of the blade and lens for focusing and image stabilization
Data Source
AI summary
A blade driving device includes: one or more blades; a base part for supporting the blade and to which an attraction magnet is fixed; a rod part rotatably and axially supported by the base part and including a connection portion connected to the blade; a rotation part rotatably and axially supported by the base part and including a connection portion connected to the rod part; a driving magnet-iron including magnet pole surfaces of different polarities fixed to the rotation part; and a coil wound around one of the magnet pole surfaces. The blade drive device includes a power supply terminal for supplying power from the wound coil to an external component, so as to supply power from a connection terminal provided at the connection line fixing base and connected to an external component via a spring leaf arranged on the lens driving device.