Multi-Layer Liquid Crystal Light Valve With Opposite Alignment
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Solution Overview
Problem
Existing electronic devices using liquid crystal materials for dimmable applications face challenges in achieving optimal light transmittance control due to limitations in aligning liquid crystal molecules effectively across multiple layers, leading to suboptimal light absorption and transmission states.
Innovation Solution
The electronic device incorporates multiple liquid crystal layers with strategically aligned layers and electrodes to control the alignment of liquid crystal molecules, utilizing host-guest liquid crystal layers with chiral molecules and dichroic dye molecules, and alignment layers to modulate light transmittance by adjusting the electric field and alignment directions across the layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple liquid crystal layers are used to enhance light modulation capability, then light transmittance control is improved, but device complexity increases due to the need for multiple alignment layers and electrodes
Solution Approach 1:
The device is divided into multiple liquid crystal layers (first and second liquid crystal layers) with distinct functions. The first layer uses opposite alignment directions for its alignment layers, while the second layer uses perpendicular alignment directions, allowing independent optimization of light modulation in different polarization states and enhancing overall control capability
Solution Approach 2:
The patent extends the single-layer liquid crystal structure into a multi-layer configuration with different alignment orientations. By adding the second liquid crystal layer with perpendicular alignment directions, the system controls light modulation in an additional dimensional space, enabling superior performance in both bright and dark states simultaneously
2Object-affected harmful factors
If alignment layers are configured with opposite alignment directions to improve liquid crystal molecule alignment, then light absorption in dark state is improved, but light transmittance in bright state may be reduced
Solution Approach 1:
The light modulation function is segmented across two liquid crystal layers. The first layer with opposite alignment directions optimizes dark state absorption, while the second layer with perpendicular alignment directions restores bright state transmittance, allowing each layer to specialize in different aspects of the light modulation cycle
Solution Approach 2:
The system uses a composite structure of multiple liquid crystal layers with different alignment configurations. This composite approach combines the light absorption benefits of opposite alignment with the light transmission benefits of perpendicular alignment, achieving superior overall performance that neither single configuration could provide alone
3Illumination intensity
If liquid crystal molecules are aligned with perpendicular alignment directions to enhance bright state transmittance, then light transmission is improved, but dark state light absorption becomes insufficient
Solution Approach 1:
The alignment functions are segmented between two layers: the first layer employs opposite alignment directions for optimal dark state absorption, while the second layer uses perpendicular alignment directions for optimal bright state transmittance, allowing each layer to excel at different stages of modulation
Solution Approach 2:
By introducing a second layer with perpendicular alignment directions, the system adds another dimensional approach to light control. This enables the device to achieve high transmittance in bright state through the perpendicular alignment layer while the opposite alignment layer maintains effective absorption in dark state
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 configuration allows for precise control of light transmittance, achieving low transmittance in dark states and high transmittance in bright states, effectively addressing the limitations of previous technologies by ensuring efficient light modulation across multiple liquid crystal layers.
Implementation Method 1
Liquid crystal materials have dielectric anisotropy and optical anisotropy and may be used as light valves
Implementation Method 2
Liquid crystal materials have dielectric anisotropy and optical anisotropy and may be used as light valves
Implementation Method 3
host-guest liquid crystal layers with chiral molecules and dichroic dye molecules
Data Source
AI summary
Provided is an electronic device including a first liquid crystal layer having a first side and a second side opposite thereto; a second liquid crystal layer disposed on the first liquid crystal layer and having a third side and a fourth side opposite thereto; a first alignment layer disposed on the first side and having a first alignment direction; a second alignment layer disposed on the second side and having a second alignment direction opposite to the first alignment direction; a third alignment layer disposed on the third side and having a third alignment direction; and a fourth alignment layer disposed on the fourth side and having a fourth alignment direction opposite to the third alignment direction. The second alignment layer is between the first liquid crystal layer and the third alignment layer. The third alignment layer is between the second liquid crystal layer and the second alignment layer.