Nano Liquid Crystal Capsule Smart Window Panel
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Solution Overview
Problem
Conventional light transmittance control devices for smart windows, particularly those using liquid crystals, require polarizing plates, alignment, and spacer insertion, leading to increased manufacturing costs and decreased haze characteristics, making them unsuitable for vehicle applications where high visibility is crucial.
Innovation Solution
A light transmission control panel that omits polarizing plates and liquid crystal alignment, utilizing nano liquid crystal capsules with dichroic dyes and a polymer matrix, allowing for active light transmittance adjustment without compromising visibility or increasing manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional liquid crystal-based light transmittance control devices use polarizing plates and alignment processes, then light transmittance control function is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The invention extracts and removes the polarizing plates and alignment processes from the conventional liquid crystal device structure, retaining only the essential liquid crystal capsule layer and electrode layers. This extraction eliminates the complex alignment processes and reduces manufacturing steps while maintaining the core light transmittance control function through the liquid crystal capsules' inherent optical properties
Solution Approach 2:
The invention uses liquid crystal capsules that can be directly applied without requiring durable alignment layers or complex polarizing plate assemblies. The capsule-based approach simplifies the structure to essential components only, reducing both manufacturing complexity and cost
2Illumination intensity
If conventional liquid crystal devices use polarizing plates and alignment films, then light transmittance control is achieved, but haze characteristics deteriorate
Solution Approach 1:
By removing the alignment films and polarizing plates from the device structure, the invention eliminates the sources of haze that these components introduce. The liquid crystal capsules maintain their optical clarity without the need for alignment layers, preserving superior haze characteristics while achieving effective light transmittance control
3Ease of manufacture
If PDLC-type transmittance control film is used, then manufacturing process is simplified, but light scattering occurs reducing driver visibility
Solution Approach 1:
The invention changes the key parameter of liquid crystal capsule size to the nanometer scale (50-200 nm), which is significantly smaller than PDLC microcapsules. This parameter change prevents light scattering that occurs with larger PDLC capsules, maintaining high driver visibility while preserving the simplified manufacturing process benefits of the capsule-based approach
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 simplifies the manufacturing process, enhances light-shielding performance, and maintains essential optical characteristics for vehicle smart windows, ensuring improved viewing angle and medium gray driving characteristics while achieving high shading rates and sufficient transmittance.
Implementation Method 1
a core material including a plurality of liquid crystals and a dichroic dye having positive dielectric anisotropy
Implementation Method 2
The plurality of liquid crystals is arranged in various directions in a state where no voltage is applied
Implementation Method 3
a dichroic dye having positive dielectric anisotropy
Data Source
AI summary
The present invention relates to a light transmission control panel for a smart window capable of actively adjusting light transmittance as necessary, and a smart window for a vehicle having the same. The present invention discloses The light transmission control panel for a smart window comprising: a first substrate on which a first electrode formed on one surface; a second substrate on which a second electrode is formed on one surface; and a liquid crystal capsule layer provided between the first substrate and the second substrate. According to the present invention of the light transmittance control panel, it has the effect of implementing improved viewing angle characteristics and medium level gray driving characteristics compared to conventional light transmittance control panel.