Carbon Nanotube Optical Laminate for Uniform Glare Control
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Solution Overview
Problem
Conventional glass windows and films lack the ability to evenly absorb the entire wavelength range of visible light, leading to issues such as glare and reduced visibility, and are prone to discoloration and deformation due to external factors.
Innovation Solution
An optical laminate comprising a substrate layer and an absorbing layer, with specific transmittance differences and thickness, using a curable resin composition containing carbon nanotubes to achieve uniform light absorption across the visible spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an external light blocking coating is applied to glass window, then glare is prevented during day, but visibility is reduced at night
Solution Approach 1:
The patent applies a dynamic transmittance control mechanism where the optical laminate can adjust its light absorption properties in real-time. The absorbing layer with specific composition and the control system enable the window to dynamically modify transmittance between 10-90%, allowing it to adapt to different lighting conditions (day/night) and prevent glare during the day while maintaining visibility at night.
Solution Approach 2:
The patent changes the transmittance parameter of the optical laminate from a fixed value to a variable range (10-90%). By controlling the absorbing layer's properties and thickness, the system can adjust the transmittance parameter to optimize both glare prevention and visibility according to ambient lighting conditions.
2Loss of energy
If absorbing film is applied to control sunlight transmittance, then energy conservation is improved, but the film is discolored and deformed by heat and humidity
Solution Approach 1:
The patent uses a composite material structure consisting of a substrate layer and an absorbing layer with specific composition. The absorbing layer contains organic compounds with conjugated double bonds and aromatic rings, combined with inorganic particles, creating a composite structure that provides both energy conservation functionality and resistance to heat and humidity, preventing discoloration and deformation.
Solution Approach 2:
The patent employs an absorbing layer with specific organic compounds that are designed to be stable under environmental conditions. The use of conjugated double bonds and aromatic rings in the molecular structure provides inherent resistance to heat and humidity, ensuring long-term reliability without requiring frequent replacement.
3Illumination intensity
If conventional absorbing film is used, then transmittance control is achieved, but light absorption is uneven across visible spectrum
Solution Approach 1:
The patent applies local quality by designing the absorbing layer with specific spatial distribution of absorbing materials. The absorbing layer contains organic compounds and inorganic particles distributed throughout the layer thickness (5-50 μm), creating localized absorption zones that collectively achieve uniform light absorption across the entire visible spectrum (380-780 nm).
Solution Approach 2:
The patent achieves homogeneous light absorption by using an absorbing layer with uniform composition and thickness. The organic compounds with conjugated double bonds and aromatic rings, combined with inorganic particles, are distributed homogeneously throughout the absorbing layer, ensuring consistent absorption characteristics across the visible spectrum and preventing color distortion.
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 optical laminate provides even light absorption, preventing glare and ensuring visibility while maintaining excellent light resistance.
Implementation Method 1
the optical laminate may have a 10% or less difference between the transmittance at a wavelength of 450 nm and the transmittance at a wavelength of 550 nm, a 10% or less difference between the transmittance at a wavelength of 550 nm and the transmittance at a wavelength of 650 nm
Data Source
Figure 1
AI summary
The present invention relates to an optical laminate comprising a base layer and an absorption layer, and may provide: an optical laminate which absorbs visible light of all wavelengths evenly, thereby providing good color, prevents glare while ensuring visibility, and has excellent light resistance; a display comprising same; and a window for a vehicle or building.