Microelectrofluidic Liquid Lens for Miniaturized Optical Systems
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Solution Overview
Problem
Existing optical systems face challenges in miniaturization due to mechanical motion and moving machinery elements when using variable apertures and lenses for light modulation, limiting the integration of advanced image capture and display technologies.
Innovation Solution
A microelectrofluidic device utilizing a chamber with non-mixable fluids and an electrode group structure that allows for independent voltage control of electrodes to change the interface between fluids, controlling the size of an aperture or the curvature of a lens surface for light modulation, using electrowetting principles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical motion and moving machinery elements are used to drive variable apertures and lenses, then light modulation function is achieved, but device size increases and miniaturization is restricted
Solution Approach 1:
The patent replaces mechanical motion systems with electrowetting-based fluid interface control. Instead of moving mechanical blades or lenses, voltage is applied to electrodes to change the curvature of a liquid lens interface, which modulates light transmission. This eliminates mechanical components and enables miniaturization while maintaining light modulation functionality.
Solution Approach 2:
The patent changes the physical state parameter of the liquid from a fixed interface to a dynamically controllable curved interface through voltage application. By changing the curvature radius of the liquid lens interface via electrowetting, the system achieves variable aperture and focus functions without mechanical movement, thus reducing device volume.
2Measurement precision
If multiple electrodes are used to control fluid interface position, then control precision is improved, but voltage control complexity increases
Solution Approach 1:
The patent segments the electrode structure into multiple independent electrode units, where each unit can be controlled separately. This segmentation allows precise control of the fluid interface position by independently adjusting the voltage on specific electrode units, achieving both high precision and manageable control complexity through modular design.
Solution Approach 2:
The patent implements dynamic voltage control where the voltage applied to each electrode unit can be independently adjusted in real-time. This dynamic control allows the system to respond quickly to different operational requirements, achieving precise interface positioning while managing control complexity through flexible, adaptive voltage modulation rather than rigid fixed-voltage systems.
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
Enables efficient and precise control of light transmission and lens curvature with low power consumption and high control speed, facilitating miniaturization and integration in image capture and display technologies.
Implementation Method 1
a first electrode group a first electrode group including a plurality of electrodes that are disposed on an inner side of the chamber, and to which a voltage is applied to change an interface between the first fluid and the second fluid
Data Source
AI summary
A microelectrofluidic device includes: a chamber; a first fluid and a second fluid which are contained in the chamber and are not mixable with each other; and a first electrode group including a plurality of electrodes that are disposed on an inner side of the chamber, and to which a voltage is applied to change an interface between the first fluid and the second fluid, wherein the plurality of electrodes are connected to form a first electrode unit, a second electrode unit, and a third electrode unit that are independently turned on or off, and the plurality of electrodes are annular and coated with an insulating material, and adjacent electrodes are connected to different electrode units.