Liquid Lens With Conical Bore And Top Electrodes
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Solution Overview
Problem
Existing liquid lens technologies face challenges in efficiently controlling the shape of the fluid interface within the lens, which affects optical power and functionality, particularly due to limitations in electrode placement and material interactions.
Innovation Solution
A method involving a layered structure with a conical bore and dielectric materials to create an electrowetting interface, allowing for precise control of the fluid interface through voltage differentials between electrodes positioned on opposite sides of the lens, enabling flexible shaping of the lens's optical power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electrodes are placed on opposite sides of the liquid lens, then control of the fluid interface is improved, but device complexity increases
Solution Approach 1:
The patent transitions from planar electrode arrangements to three-dimensional electrode placement by positioning electrodes on opposite sides of the liquid lens (top and bottom surfaces). This spatial dimensionality enables direct control of the fluid interface from multiple directions, improving optical control while managing the added complexity through structured electrode geometry
Solution Approach 2:
The electrode structure is segmented into distinct regions: first electrodes on the top surface and second electrodes on the bottom surface, with conductive materials divided into multiple segments (e.g., first conductive material and second conductive material). This segmentation allows independent control of different fluid interface regions while simplifying the overall device architecture through modular electrode design
2Reliability
If conductive materials are deposited on conical side surfaces, then electrical connection to conductive liquid is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs conical side surfaces in the electrode structure, utilizing curved geometry to improve electrical connection between conductive materials and the conductive liquid. The conical shape provides a gradual transition in surface area, enhancing contact area and electrical reliability while the curvature helps manage deposition uniformity challenges
Solution Approach 2:
The patent uses composite material structures combining dielectric materials with conductive materials in specific configurations. The dielectric layer is positioned between the conductive material on the conical surface and the conductive liquid, creating a composite structure that maintains electrical connection while providing necessary insulation and controlling the electrowetting interface
3Ease of operation
If dielectric materials are deposited on conductive materials, then electrowetting interface control is improved, but device complexity increases
Solution Approach 1:
The patent introduces dielectric materials as intermediary layers between the conductive materials and the conductive liquid. These dielectric layers (first dielectric material and second dielectric material) serve as mediators that enable controlled electrowetting by creating the necessary electrical field distribution while maintaining physical separation and providing structural support for the electrowetting interface
4Adaptability or versatility
If a conical bore is used in the liquid lens, then fluid interface shaping capability is improved, but manufacturing difficulty increases
Solution Approach 1:
The patent employs a conical bore structure in the liquid lens, utilizing curved geometry to enhance fluid interface shaping capability. The conical shape provides a gradual transition in cross-sectional area, enabling effective control of liquid flow and interface formation while the geometric simplicity helps mitigate manufacturing complexity compared to more complex curved surfaces
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 approach enhances the ability to control the fluid interface and optical power of the liquid lens, improving its functionality and design flexibility by allowing for top-only electrical connections and increased space for electrical contacts, thus overcoming previous limitations in existing liquid lens designs.
Implementation Method 1
at least a portion of the first dielectric material on the conical side surface is covered with an electrically insulating electrowetting material that is configured to provide an electrowetting interface with a conductive liquid
Data Source
AI summary
A liquid lens includes an intermediate layer having a tapered cavity. First and second outer layers are bonded to top and bottom sides, respectively of the intermediate layer. The liquid lens further includes a chamber that is formed, at least in part by the tapered cavity, and the first and second outer layers. A fluid interface is disposed between first and second fluids in the chamber. The liquid lens further includes first and second electrodes on a top side of the liquid lens. The second electrode is in electrical communication with the first fluid, whereby a position of the fluid interface is based at least in part on voltage applied between the first and second electrodes. The intermediate layer may optionally comprise silicon or glass.