Vehicle Smart Glass Control Using Light-Responsive Pulse Power
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Solution Overview
Problem
Conventional smart glass systems using electrochromic devices face issues with transmittance control due to impurities in the electrochromic layer and require continuous power, leading to reduced vehicle driving efficiency and irreversible discoloration when exposed to light, necessitating a new method for controlling transmittance based on external light conditions.
Innovation Solution
A smart glass transmittance control system that automatically adjusts transmittance based on external light levels, using a control unit to manage power supply and determine driving environments, allowing for discoloration and achromatization in response to light quantity, with power application to increase transmittance when necessary, and pulse power for rapid achromatization in low-light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous power is applied to maintain smart glass transmittance control, then transmittance control is maintained, but vehicle driving power is reduced
Solution Approach 1:
The patent applies periodic pulsed power instead of continuous power to reset the electrochromic layer. The control unit sends periodic reset signals to the electrochromic layer to maintain its functionality without requiring continuous power supply, thereby reducing energy consumption while preserving transmittance control capability.
Solution Approach 2:
The smart glass system utilizes external light sources (sunlight, headlights) to automatically reset the electrochromic layer without requiring active power consumption from the vehicle. The electrochromic layer self-resets when exposed to sufficient light intensity, eliminating the need for continuous electrical power and reducing the load on vehicle driving power.
2Reliability
If smart glass is configured to be irreversibly discolored in light and achromatized only when power is applied, then transmittance can be controlled, but a new control method is required
Solution Approach 1:
The control unit monitors ambient light conditions and automatically adjusts smart glass transmittance accordingly. When external light intensity exceeds a threshold, the system automatically resets the electrochromic layer to achieve achromatization, creating a closed-loop feedback control system that simplifies operation while maintaining reliable transmittance control.
Solution Approach 2:
The system changes the operating parameters of the electrochromic layer by applying periodic voltage pulses or utilizing light-induced reset mechanisms. This allows the smart glass to transition between discolored and achromatized states based on environmental conditions, providing a new control method that adapts to varying light conditions without increasing system complexity.
3Ease of operation
If polarization technology is used to control smart glass transmittance, then transmittance is adjustable, but the function is deteriorated by impurities in electrochromic layer
Solution Approach 1:
The patent employs a composite structure combining electrochromic layer with auxiliary functional layers that compensate for impurity effects. The multi-layer composite design includes transparent conductive oxides and protective layers that enhance the overall performance and stability of the smart glass system, reducing the negative impact of electrochromic layer impurities on transmittance control reliability.
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 solution enables stable power management for vehicles, enhances user visibility by adapting to various driving environments, and maintains optimal transmittance levels, addressing the inefficiencies of conventional systems.
Implementation Method 1
Electrochromism is a phenomenon in which a color is reversibly changed by the direction of an electric field when voltage is applied, and an electrochromic material is a material having optical properties which are reversibly changeable by an electrochemical reduction-oxidation reaction.
Implementation Method 2
an electrochromic material is a material having optical properties which are reversibly changeable by an electrochemical reduction-oxidation reaction
Data Source
AI summary
A smart glass transmittance control system includes: a smart glass that decreases transmittance of the smart glass in response to the quantity of light introduced and increases the transmittance of the smart glass when electric power is applied; a power supply unit to supply the electric power to the smart glass; a control unit to control supply of the electric power from the power supply unit to the smart glass in order to control the transmittance of the smart glass according to a user request. In particular, the control unit controls the supply of the electric power from the power supply unit to the smart glass based on the driving environment of a vehicle, the quantity of light from an external light source, or the driving environment condition of the smart glass.