Anti-Reflective Window With Composite Layers For Display Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing windows for display devices face challenges in achieving low reflectance and excellent mechanical strength, which are essential for improving display quality and protecting the device from external impacts.
Innovation Solution
A window structure comprising a base layer with a refractive index of 1.6 to 2.0, a first layer with a lower refractive index, a middle adhesive layer, and a print layer, which work together to reduce surface reflectance and enhance mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional window structure is used, then the mechanical strength is adequate, but the surface reflectance is high which reduces display quality
Solution Approach 1:
The window employs a composite structure consisting of a base layer (glass substrate or polymer film) combined with multiple functional layers including a first layer (low refractive index material such as MgF2, SiO2, or fluorinated compounds), a second layer (fluorine-based compound), and a middle adhesive layer. This composite material approach reduces surface reflectance to 0.5% or less while maintaining excellent mechanical strength and durability.
Solution Approach 2:
The invention optimizes the refractive index parameters of different layers to achieve low reflectance. The base layer has a refractive index of 1.6-2.0, the first layer has a lower refractive index (1.3-1.5), and the second layer is composed of fluorine-based compounds. By precisely controlling these optical parameters and layer thicknesses, the window achieves ultra-low reflectance while maintaining structural integrity.
2Length of moving object
If the window is made thinner to reduce device thickness, then the device becomes more compact, but the window becomes more susceptible to external impacts and deformation
Solution Approach 1:
The window uses a composite structure with a base layer combined with multiple functional layers. The base layer can be a glass substrate or polymer film providing mechanical strength, while the additional layers (first layer with low refractive index, second layer with fluorine-based compound, and middle adhesive layer) provide optical performance and environmental resistance. This composite approach enables thin design while maintaining reliability.
Solution Approach 2:
The invention employs thin film technology with the first layer having a thickness of 50-150 nm, the second layer of 10-50 nm, and the middle adhesive layer of 5-30 nm. These ultra-thin functional layers provide the necessary optical and protective functions without significantly increasing overall thickness, enabling compact device design while maintaining 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 proposed window design achieves a low surface reflectance of 0.5% or less, while maintaining excellent mechanical strength, thereby improving the overall display efficiency and durability of the display device.
Implementation Method 1
a base layer having a transmission region and a bezel region adjacent to the transmission region and having a refractive index of about 1.6 to about 2.0, a first layer disposed on an upper side of the base layer and having a refractive index lower than the refractive index of the base layer
Implementation Method 2
In an embodiment, Specular Component Included (SCI) reflectance on an upper surface of the second layer may be about 0.5% or less
Data Source
AI summary
Provided are a window and a display device including the window. The window may include a base layer having a refractive index of about of 1.6 to about 2.0, a first layer on an upper side of the base layer and having a refractive index lower than that of the base layer, a second layer on an upper side of the first layer, a middle adhesive layer between the first layer and the second layer, and a print layer on a lower side of the base layer.