Dimming Window Temperature Compensation for Uniform Transmittance
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Solution Overview
Problem
Dye-doped liquid crystal dimming glass experiences dimming abnormalities due to varying light transmittance in different operating environments, caused by temperature changes and regional climate differences, leading to uneven light transmittance and potential ionization issues.
Innovation Solution
A windowing device with a dimming transparent substrate and a semiconductor temperature adjustment element, such as Peltier structures, coupled with a temperature sensor and controller to maintain the substrate's temperature within a predetermined range, ensuring consistent light transmittance across varying environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If dye-doped liquid crystal dimming glass is used to achieve rapid response and high contrast, then response speed and contrast are improved, but temperature sensitivity and uneven light transmittance occur in different environments
Solution Approach 1:
The patent applies temperature compensation by dynamically adjusting the voltage parameter applied to the liquid crystal layer based on detected temperature. The controller modifies operating parameters (voltage) in response to temperature changes, compensating for the temperature sensitivity of dye-doped liquid crystals and preventing uneven light transmittance while maintaining rapid response characteristics.
2Speed
If high temperature operation is maintained to reduce viscosity and improve response, then response speed is improved, but ionization occurs and causes dimming abnormalities
Solution Approach 1:
The patent implements a feedback control system where a temperature sensor continuously monitors the temperature of the dimming glass, and the controller adjusts the applied voltage based on this feedback. When temperature rises and approaches levels that cause ionization, the system automatically reduces the voltage to prevent ionization while maintaining adequate response speed through optimized voltage control.
3Object-affected harmful factors
If low temperature operation is maintained to prevent ionization, then ionization is reduced, but response speed decreases due to increased viscosity
Solution Approach 1:
The patent dynamically adjusts the voltage parameter based on temperature conditions. At lower temperatures where viscosity increases, the controller increases the applied voltage to compensate for the reduced molecular mobility, thereby maintaining adequate response speed without causing ionization, as the higher voltage overcomes the increased viscous resistance.
4Reliability
If temperature compensation is added to maintain uniform light transmittance, then light transmittance uniformity is improved, but device complexity increases
Solution Approach 1:
The patent introduces a temperature sensor as an intermediary component that detects temperature conditions and provides information to the controller. This intermediary enables automatic temperature compensation by measuring the physical state (temperature) and translating it into control actions, achieving uniform light transmittance through a relatively simple sensing and control architecture.
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 effectively prevents dimming abnormalities by adjusting the temperature of the dimming transparent substrate, maintaining consistent light transmittance and preventing ionization, thus ensuring stable performance across different environmental conditions.
Implementation Method 1
a semiconductor temperature adjustment element, such as Peltier structures
Implementation Method 2
dye-doped liquid crystal dimming glass has a wider application prospect due to such advantages as rapid response and high contrast
Data Source
AI summary
A windowing device includes: a windowing module including a dimming transparent substrate and a semiconductor temperature adjustment element, the dimming transparent substrate being provided with different light transmittances when the dimming transparent substrate has different adjustment parameters; a temperature adjustment circuitry configured to input a current to the semiconductor temperature adjustment element and adjust a temperature of the semiconductor temperature adjustment element; a temperature sensor configured to detect a temperature of an environment where the windowing module is located; and a controller configured to input a circuitry adjustment signal to the temperature adjustment circuitry when the temperature detected by the temperature sensor is beyond a predetermined temperature range, as to adjust a temperature of the dimming transparent substrate to be within the predetermined temperature range.