Optical Device Movable Unit with Permanent Magnet and Coil
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Solution Overview
Problem
Existing optical modulation devices, such as liquid crystal panels, have limitations in achieving high image resolution due to imprecise axis shifting of video light, which affects the driving precision and display characteristics of optical transmission plates in devices like wobbling devices.
Innovation Solution
An optical device with a movable unit supported by a swingable axis, featuring a permanent magnet and coil configuration that allows precise positioning and magnetic field application, enabling precise control of the distance between the magnet and coil to enhance driving efficiency and reduce moment of inertia, thus improving the shifting precision of the optical axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the permanent magnet and coil are positioned closer to each other to improve driving efficiency, then the magnetic field application becomes more effective, but the risk of contact between the components increases
Solution Approach 1:
The patent introduces a non-magnetic spacer as an intermediary component between the permanent magnet and the coil. This spacer maintains a precise gap that prevents direct contact between the magnet and coil while allowing the magnetic field to pass through effectively, thus resolving the contradiction between improving driving efficiency through closer positioning and preventing harmful contact between components.
2Measurement precision
If the optical transmission plate is swayed with higher precision to improve axis shifting accuracy, then image resolution increases, but the driving unit configuration becomes more complex
Solution Approach 1:
The patent replaces a complex mechanical driving unit with an electromagnetic driving unit consisting of a permanent magnet and coil. This substitution eliminates the need for mechanical linkages and moving parts, achieving high-precision axis shifting through electromagnetic force while simplifying the overall driving unit configuration.
Solution Approach 2:
The patent employs dynamic control of the electromagnetic driving unit by varying the current applied to the coil, enabling precise control of the optical transmission plate's movement. This dynamic approach allows for high-precision axis shifting without requiring complex mechanical positioning mechanisms.
3Speed
If the moment of inertia of the movable unit is reduced to improve swinging response, then the optical axis shifting speed increases, but the structural design becomes more challenging
Solution Approach 1:
The patent segments the movable unit into distinct functional components: the optical transmission plate, the permanent magnet, the coil, and the non-magnetic spacer. This segmentation allows for optimized distribution of mass and strategic placement of components to minimize the moment of inertia, thereby improving swinging response and optical axis shifting speed while maintaining manageable structural design.
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 optical device achieves high driving precision and efficient shifting of the optical axis, leading to improved display characteristics and increased image resolution by allowing closer placement of the magnet and coil while preventing contact and optimizing thermal expansion management.
Implementation Method 1
a coil that generates a magnetic field to be applied to the permanent magnet
Implementation Method 2
a permanent magnet that is provided in the movable unit; and a coil that generates a magnetic field to be applied to the permanent magnet
Data Source
AI summary
An optical device includes a glass plate, a movable unit that supports the glass plate, axis portions that swingably support the movable unit around a swing axis, a support unit that supports the axis portions and, a permanent magnet that is provided in the movable unit, and coils that are disposed to face the permanent magnet and generate a magnetic field to be applied to the permanent magnet. The movable unit includes a through hole that the permanent magnet is inserted into and a protrusion portion that protrudes inside the through hole to support the permanent magnet.