Triple-State Liquid Crystal Device Voltage Control
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Solution Overview
Problem
Conventional liquid crystal devices can only switch between two states, such as transparent white and transparent black, or transparent white and scattering, limiting their application in achieving a triple state with specific transmittance and haze values.
Innovation Solution
A triple state liquid crystal device is developed, capable of realizing transparent white, transparent black, and scattering states by adjusting the parallel conductivity of the liquid crystal layer to specific ranges, allowing inter-switching among these states through varying the applied voltage frequency and level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional liquid crystal device switches between only two states (transparent white and transparent black, or transparent white and scattering), then the device structure and control mechanism remain simple, but the application versatility and functional complexity are limited
Solution Approach 1:
The patent implements a triple-state liquid crystal device that dynamically switches between three distinct states (transparent white, transparent black, and scattering) by controlling the liquid crystal alignment through different voltage frequencies and levels. This dynamic multi-state capability enhances application versatility while maintaining a relatively simple device structure, resolving the contradiction between versatility and complexity.
Solution Approach 2:
The patent utilizes parameter changes in the liquid crystal layer, specifically controlling the parallel conductivity within a specific range (1.0×10^-5 to 1.0×10^-4 S/cm) and varying the frequency and level of applied voltage to achieve different optical states. By precisely controlling these parameters, the device achieves triple-state functionality without requiring complex structural modifications.
2Adaptability or versatility
If the parallel conductivity of the liquid crystal layer is adjusted to a specific range, then the triple state switching capability is achieved, but the manufacturing precision and material control requirements increase
Solution Approach 1:
The patent specifies a particular range for parallel conductivity (1.0×10^-5 to 1.0×10^-4 S/cm) to enable triple-state switching. By defining this specific parameter range, the patent balances the achievement of versatile state switching with manageable manufacturing precision requirements, avoiding overly stringent control demands while ensuring functional performance.
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 device effectively achieves the desired transmittance and haze values for each state, enabling broader applications in light modulation, including smart windows and displays, by controlling the conductivity of the liquid crystal layer.
Implementation Method 1
A liquid crystal device may control light transmittance by switching an alignment state of liquid crystals by an external signal such as an applied voltage
Implementation Method 2
The liquid crystal device may control light transmittance by switching an alignment state of liquid crystals by an external signal such as an applied voltage
Implementation Method 3
The liquid crystal layer has a parallel conductivity of 1.0 × 10^-5 to 1.0 × 10^-4 S/cm
Data Source
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AI summary
The present application relates to a liquid crystal device. The liquid crystal device of the present application may realize a transparent white state, a transparent black state and a scattering state according to a frequency and/or level of an applied voltage. The liquid crystal device may be applied to, for example, a window of a vehicle, a smart window, a window protective film, a display, a light cutoff panel for a display, an active retarder for a 3D image display or a viewing angle controlling film.