Anti-Reflective Stack Composite Layer Design for Outdoor Readability
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Solution Overview
Problem
Existing display technologies face challenges in achieving effective anti-reflective performance, especially in outdoor environments, due to high manufacturing costs and long production times, and the existing anti-reflective stacks have poor performance in reducing natural light reflectivity.
Innovation Solution
The proposed anti-reflective stack includes a substrate with a first refractive index, an antistatic layer with a second refractive index, and an anti-reflective layer comprising at least one composite layer with different refractive indices, which reduces the reflectivity of natural light by eliminating optical interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing anti-reflective stacks are used, then manufacturing cost and production time are reduced, but anti-reflective performance in outdoor environments deteriorates
Solution Approach 1:
The patent employs a composite anti-reflective layer structure consisting of multiple layers with different refractive indices (first anti-reflective layer with third refractive index, second anti-reflective layer with fourth refractive index). This composite structure optimizes optical interference to reduce reflectivity of natural light while maintaining manufacturing feasibility, thereby resolving the contradiction between manufacturing cost and anti-reflective performance.
Solution Approach 2:
The patent optimizes specific parameters including the refractive indices of different layers (third refractive index greater than first and fourth), thickness ratios (first anti-reflective layer thickness less than or equal to second anti-reflective layer thickness), and structural configuration. These parameter changes enable effective anti-reflective performance in outdoor environments while controlling manufacturing complexity.
2Ease of manufacture
If existing anti-reflective stacks are used, then manufacturing cost and production time are reduced, but readability in well-lit outdoor environments deteriorates
Solution Approach 1:
The multi-layer composite anti-reflective structure with optimized refractive indices reduces natural light reflection more effectively, thereby improving readability in well-lit outdoor environments. The composite design allows for better optical control without significantly increasing production time.
Solution Approach 2:
The patent applies different material properties and thicknesses to different layers of the anti-reflective structure (first anti-reflective layer with third refractive index attached to substrate, second anti-reflective layer with fourth refractive index attached to antistatic layer). This local optimization of layer properties enhances overall anti-reflective performance and readability while maintaining manufacturing efficiency.
3Reliability
If complex anti-reflective structures are used, then anti-reflective performance improves, but device complexity increases
Solution Approach 1:
The patent uses a composite anti-reflective layer with two distinct layers having different refractive indices and thicknesses. This composite approach achieves superior anti-reflective performance by optimizing optical interference, while the structured design maintains manufacturing feasibility and avoids excessive complexity.
Solution Approach 2:
The patent optimizes key parameters including the refractive index relationships (third and fourth refractive indices both greater than first and fourth), thickness ratios, and layer configuration. These parameter optimizations enable effective anti-reflective performance with a manageable structural complexity that does not excessively increase device complexity.
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 effectively reduces the reflectivity of natural light across the visible light spectrum (380 nm to 780 nm), enhancing the readability of display devices in well-lit outdoor environments while minimizing manufacturing costs and time.
Implementation Method 1
an anti-reflective layer between the substrate and the antistatic layer, where the anti-reflective layer includes at least one composite layer, the composite layer includes a first anti-reflective layer and a second anti-reflective layer... where the second refractive index is greater than the first refractive index and the fourth refractive index, and the third refractive index is greater than the first refractive index and the fourth refractive index
Data Source
AI summary
An anti-reflective stack and a method of manufacturing the same, a display panel, and a display device. The anti-reflective stack includes: a substrate having a first refractive index and a first surface; an antistatic layer on a side of the substrate, the antistatic layer having a second refractive index and a second surface opposite to the first surface; and an anti-reflective layer between the substrate and the antistatic layer, the anti-reflective layer including at least one composite layer which includes a first anti-reflective layer having a third refractive index and a second anti-reflective layer having a fourth refractive index, where at most one first anti-reflective layer is attached with the first surface, and at most one second anti-reflective layer is attached with the second surface, and each of the second refractive index and the third refractive index is greater than the first refractive index and the fourth refractive index.