Segmented Electrode Smart Glazing for Uniform Light Modulation
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Solution Overview
Problem
Existing optically active glazing systems suffer from diffraction effects, non-uniform transitions, and susceptibility to physical contaminants, which can impact safety and performance.
Innovation Solution
The design incorporates substrates with electrodes featuring alternating main lines and branches that extend across the substrate, along with a protective coating to prevent contamination and ensure a uniform electric field, reducing diffraction and enhancing the stability of the optical modulator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional comb electrodes are used in optically active glazing, then the system can achieve transparent or opaque appearance by concentrating particles, but diffraction effects occur that are undesirable for glazing and can be distracting for vehicle operators
Solution Approach 1:
The electrode pattern is segmented into multiple main lines with branches extending from them, creating a more complex segmented structure that reduces diffraction while maintaining particle concentration capability
Solution Approach 2:
The electrode design uses asymmetric branch extensions from main lines rather than symmetric comb patterns, which helps reduce diffraction effects while maintaining the ability to concentrate particles for optical modulation
2Productivity
If traditional electrode designs are used, then the system can switch between transparent and opaque states, but the transition speed and uniformity across the glazing are not sufficient
Solution Approach 1:
The electrode is divided into multiple main lines with branches that create multiple electric field zones, enabling more uniform and faster particle redistribution across the entire glazing surface
Solution Approach 2:
The electrode design adds a dimensional component with branches extending from main lines, creating a two-dimensional electrode pattern that improves field uniformity and transition characteristics across the glazing surface
3Adaptability or versatility
If the glazing is configured half-way between opaque and transparent, then variable optical states are achieved, but a lack of uniformity can be confusing or distracting
Solution Approach 1:
The segmented electrode structure with multiple main lines and branches creates multiple controlled electric field zones that work together to achieve uniform particle distribution at intermediate optical states, eliminating appearance inconsistencies
4Productivity
If physical contaminants such as granules, fibers, or rocks are present in the fluid, then the system may achieve optical modulation, but the contaminants can cause physical damage to electrodes or disrupt electrical fields
Solution Approach 1:
A protective coating layer is applied to the electrodes, forming a thin film barrier that protects against physical damage from contaminants while maintaining electrical functionality and optical performance
5Productivity
If physical contaminants are present in the fluid, then optical modulation may occur, but contaminants can become electrically conductive and short-circuit the electrical field between electrodes
Solution Approach 1:
The protective coating forms an insulating thin film barrier on the electrodes that prevents electrical short-circuiting by contaminants while allowing the optical modulation function to operate normally
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 solution minimizes diffraction, achieves a more uniform opaque state, and reduces the impact of contaminants, leading to improved safety and performance by maintaining a stable electric field and preventing physical damage and short-circuiting.
Implementation Method 1
a fluid is provided in between said substrates, the fluid comprising particles, wherein the particles are electrically charged or chargeable... providing a potential difference to the electrodes... charged particles suspended in a fluid between the substrates can be moved by applying voltages to the electrodes
Data Source
AI summary
Some embodiments are directed to a light modulator comprising transparent or reflective substrates, multiple electrodes being applied to the substrates in a pattern across the substrate. A controller may apply an electric potential to the electrodes to obtain an electro-magnetic field between the electrodes providing electrophoretic movement of the particles towards or from an electrode.