Electrochromic Film State Control via Charge Monitoring
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Solution Overview
Problem
Existing methods for controlling the optical states of electrochromic films in smart windows are limited in precision and flexibility, as they rely on manual adjustment of electric charges without real-time monitoring and pre-set amounts, leading to inefficiencies in achieving desired transparency and color changes.
Innovation Solution
A method involving the selection of desired optical states in electrochromic films, where electric charges are injected or extracted under controlled voltage or current conditions, with real-time monitoring to stop at pre-set amounts, allowing for precise adjustment of the film's optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual adjustment of electric charges is used to control optical states, then the device complexity is reduced, but the manufacturing precision and measurement precision of charge control deteriorates
Solution Approach 1:
The patent employs real-time monitoring of electric charge injection/extraction processes with feedback control mechanisms. Sensors detect the actual charge state of the electrochromic film and feed this information back to the controller, which automatically adjusts the charge input to achieve the desired optical state with high precision, eliminating the need for complex manual adjustment systems.
Solution Approach 2:
The patent replaces manual mechanical adjustment mechanisms with automated electronic control systems. Instead of physically adjusting components to control charge flow, the system uses electronic controllers, sensors, and algorithms to precisely manage the injection and extraction of electric charges, achieving high precision without mechanical complexity.
2Manufacturing precision
If real-time monitoring and pre-set charge amounts are implemented, then the manufacturing precision of optical state control is improved, but the device complexity increases
Solution Approach 1:
The patent implements pre-programmed charge profiles and pre-set target states for different optical conditions. The control system is pre-configured with the relationship between charge amounts and resulting optical states, allowing it to automatically select and execute the appropriate charge injection/extraction sequence to achieve desired transparency and color changes with high precision.
Solution Approach 2:
Real-time sensors monitor the actual optical state and charge levels, providing continuous feedback to the controller. This closed-loop feedback system automatically compensates for variations and maintains precise control of the optical state, justifying the added complexity through superior performance and automation.
3Productivity
If precise control of electric charges is achieved through monitoring, then the productivity of optical state adjustment is improved, but the use of energy increases
Solution Approach 1:
The patent uses periodic sampling and monitoring rather than continuous full-power operation. The system monitors charge levels and optical states at strategic intervals, injecting or extracting charges in controlled pulses rather than continuous flow. This periodic approach maintains precise control capability while significantly reducing average energy consumption compared to continuous control methods.
Solution Approach 2:
The system applies partial charge injection/extraction only when and where needed to achieve the desired optical state transition. Rather than continuously maintaining maximum control capability, the system activates charge control only during state transitions and uses the minimum necessary charge amounts, improving productivity while reducing energy waste from excessive or continuous charge manipulation.
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 precise and efficient control of electrochromic film states, ensuring optimal transparency and color changes by accurately monitoring and managing the amount of electric charges injected or extracted, thereby enhancing the functionality of smart windows.
Implementation Method 1
Electrochromism is a phenomenon displayed by some materials of reversibly changing optical properties by using bursts of charges to cause electrochemical redox (reduction and oxidation) reactions in electrochromic materials
Implementation Method 2
using bursts of charges to cause electrochemical redox (reduction and oxidation) reactions in electrochromic materials
Data Source
AI summary
The disclosure relates generally to a method of changing an optical state of an electrochromic film. The electrochromic film may have a plurality of optical states. The method may include selecting a desired state of the plurality of optical states; injecting electric charges into the electrochromic film; monitoring an amount of the electric charges injected into the electrochromic film; and stopping injecting the electric charges when the electric charges reaches a pre-set amount corresponding to the desired state.