Incident-Light Control via Extracted Permanent Magnet and Coil Interaction
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Solution Overview
Problem
Conventional incident-light controlling apparatuses with small size coils face challenges in generating sufficient magnetic power for rotating small structural members, making it difficult to achieve effective light control in compact devices.
Innovation Solution
The apparatus incorporates a permanent magnet directly joined to the incident-light controlling means, with a pair of coils having windings around a nonmagnetic core, where the magnetic field interaction between the coils and the permanent magnet allows for rotation between two stationary positions, enabling efficient light control without relying on long core lengths for magnetic power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a coil with a magnetic core is used to generate magnetic power for rotating small structural members, then the magnetic power can be effectively utilized, but the apparatus size increases due to the requirement for sufficient core length and coil turns
Solution Approach 1:
The patent extracts the magnetic core from the coil structure, eliminating the need for a magnetic core inside the coil. Instead, a permanent magnet is positioned outside the coil, allowing the coil to generate magnetic power without requiring a long core length or numerous turns, thus reducing apparatus size while maintaining effective magnetic power for rotating small structural members
Solution Approach 2:
The patent introduces a permanent magnet as an intermediary element that works in conjunction with the coil. The permanent magnet provides a stable magnetic field that interacts with the coil's magnetic field to generate rotational force, enabling the system to achieve sufficient magnetic power with a smaller, more compact coil structure
2Volume of moving object
If the core length is made short to reduce apparatus size, then the volume is reduced, but insufficient magnetic power is generated even with electric power supplied to the coil
Solution Approach 1:
The patent removes the magnetic core from inside the coil and repositions it outside as a permanent magnet. This extraction allows the coil to function with minimal length while the external permanent magnet provides the necessary magnetic field interaction to generate sufficient magnetic power for rotating small structural members
Solution Approach 2:
The patent changes the configuration parameters of the magnetic system by moving the magnetic core from an internal position within the coil to an external position. This parameter change allows the coil to be shortened significantly while maintaining or even enhancing magnetic power generation through the interaction between the coil's magnetic field and the external permanent magnet
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 allows for the creation of a compact incident-light controlling apparatus that can effectively rotate small structural members, such as a diaphragm blade, using minimal electric power, thereby enabling precise light control in small devices like microvideoscopes.
Implementation Method 1
The incident-light controlling means is rotated alternately between the first stationary position and the second stationary position by an interaction between a magnetic field which is generated due to a state of the coils upon passing an electric power, and a magnetic field which is generated due to the permanent magnet
Data Source
AI summary
An incident-light controlling apparatus has a first aperture in a substrate, a diaphragm blade which rotates around an axis, and controls light passing through the first aperture, by the diaphragm blade rotating alternately between a first stationary position coinciding with the first aperture, and a second stationary position retracted from the first aperture, a permanent magnet joined directly to the diaphragm blade, at a position of the axis of rotation of the diaphragm blade, and magnetized in a direction of a plane of rotation of the diaphragm blade, and a pair of coils having a winding around cores disposed such that an end portion of each coil faces the magnet. The diaphragm blade rotated alternately between the first and second stationary positions due to an interaction between a generated magnetic field upon passing an electric power, and a magnetic field generated due to the magnet.