Optical Laminate Anti-Reflection Thin Layer
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Solution Overview
Problem
Image display surfaces in devices like LCDs and CRTs suffer from interface reflection and interference fringes due to refractive index differences between layers, which degrade image visibility and appearance, especially when black is displayed.
Innovation Solution
A thin layer of resin with specific properties and a penetrative solvent is applied between the light transparent base material and the hardcoat layer to prevent interface reflection and interference fringes, enhancing mechanical strength and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a hardcoat layer is formed directly on a light transparent base material, then mechanical strength is improved, but interface reflection and interference fringes occur due to refractive index differences
Solution Approach 1:
The patent introduces a thin layer as an intermediary between the light transparent base material and the hardcoat layer. This thin layer has a refractive index that gradually transitions from the base material to the hardcoat layer, eliminating the abrupt refractive index difference that causes interface reflection and interference fringes, while still providing mechanical strength reinforcement.
Solution Approach 2:
The thin layer is applied locally only at the interface region where refractive index mismatch occurs, rather than throughout the entire structure. This localized application addresses the specific problem of interface reflection without unnecessarily adding material or complexity to other regions of the optical laminate.
2Object-affected harmful factors
If multiple layers with different refractive indices are stacked to reduce reflection, then anti-reflection performance is improved, but device complexity increases
Solution Approach 1:
The patent segments the anti-reflection function into a thin layer with gradually varying refractive index properties, rather than using multiple discrete layers with different fixed refractive indices. This segmentation approach achieves the anti-reflection effect through a continuous gradient, reducing structural complexity while maintaining functionality.
3Object-affected harmful factors
If a thin layer with specific resin properties is formed before the hardcoat layer, then interface reflection and interference fringes are eliminated, but manufacturing process complexity increases
Solution Approach 1:
The thin layer is formed as a preliminary step before applying the hardcoat layer. By preparing this intermediate layer in advance with appropriate refractive index properties, the subsequent hardcoat layer application becomes simpler and the overall manufacturing process is streamlined, despite the additional initial step.
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 solution effectively eliminates interface reflection and interference fringes, improving image visibility and the overall appearance of the display surface by creating a nearly interface-free zone between the base material and the hardcoat layer.
Implementation Method 1
a thin layer formed of a resin having a weight average molecular weight of not less than 200 and not more than 1000 with three or less functional groups and a penetrative solvent is provided on the light transparent base material
Implementation Method 2
In an optical laminate comprising layers with a large refractive index difference stacked on top of each other, however, interface reflection and interference fringes often occur at the interface of the mutually superimposed layers
Implementation Method 3
interface reflection and interference fringes often occur at the interface of the mutually superimposed layers
Data Source
AI summary
An optical laminate is provided including a thin layer formed of a resin having a weight average molecular weight of not less than 200 and not more than 1000 with three or less functional groups and a penetrative solvent is provided on a light transparent base material, and a hardcoat layer is provided on the thin layer.