Optical Laminate Anti-Dazzle via Dual Particle Segmentation
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Solution Overview
Problem
Existing anti-glare films for high-resolution image display panels lack sufficient anti-dazzle properties while maintaining anti-glare and contrast, due to trade-offs in particle size, refractive index, and filler aggregation, leading to suboptimal performance.
Innovation Solution
An optical laminate with a translucent substrate and a micro-concave-convex optical functional layer containing two types of inorganic fine particles and resin particles, optimized to achieve specific haze conditions and transmitted image clarity, ensuring effective light scattering and uniform surface roughness for improved anti-dazzle properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the particle size of the filler is increased to improve anti-glare properties, then the anti-glare properties increase, but the anti-dazzle properties deteriorate due to an increase in the lens effect
Solution Approach 1:
The patent divides the filler into two distinct size categories: fine particles (0.1-10 μm) to control internal scattering and coarse particles (10-100 μm) to create surface micro-concave-convex structures. This segmentation allows each particle size to perform its specific function without interfering negatively, resolving the contradiction between anti-glare and anti-dazzle properties
Solution Approach 2:
The patent applies different particle sizes at different locations and depths: fine particles are distributed throughout the resin layer for internal scattering control, while coarse particles are concentrated at the surface to form micro-concave-convex structures. This local differentiation optimizes both anti-glare and anti-dazzle properties simultaneously
2Object-affected harmful factors
If the added amount of filler is increased to improve anti-glare properties, then the anti-glare properties increase, but the anti-dazzle properties deteriorate due to increased diffused light
Solution Approach 1:
The patent segments the filler addition into two controlled components with specific concentration ranges: fine particles at 1-20 parts by weight and coarse particles at 1-10 parts by weight relative to the resin. This segmented approach prevents excessive filler content while achieving both anti-glare and anti-dazzle effects
Solution Approach 2:
The patent optimizes the particle size distribution parameters and concentration ratios to achieve the desired optical properties. By controlling the average particle sizes and their weight ratios, the patent achieves optimal light scattering without excessive diffusion that would harm anti-dazzle properties
3Object-affected harmful factors
If a low-reflection layer is provided to improve contrast, then the contrast is improved, but the multilayer arrangement is disadvantageous in terms of cost
Solution Approach 1:
The patent combines the anti-glare function and the contrast enhancement function into a single integrated resin layer by incorporating both fine and coarse particles. This merging eliminates the need for a separate low-reflection layer, reducing structural complexity and cost while achieving both anti-glare and high contrast properties
Solution Approach 2:
The resin layer containing the dual particle system performs multiple functions simultaneously: it provides anti-glare properties through internal scattering from fine particles, anti-dazzle properties through the micro-concave-convex surface structure from coarse particles, and high contrast through controlled light scattering. This multi-functionality replaces what would traditionally require multiple separate layers
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 effectively suppresses dazzle while maintaining anti-glare and contrast, even on high-resolution image display panels, by uniformly scattering light and controlling the concave-convex structure, thus enhancing the anti-dazzle properties and luminance ratio.
Implementation Method 1
An anti-glare film has, on its surface, a concave-convex structure which scatters external light
Implementation Method 2
The anti-dazzle properties are improved with an increase in internal scattering due to the use of a filler having a refractive index that is greatly different from that of the resin
Data Source
AI summary
An optical laminate includes a translucent substrate, and at least one optical functional layer provided on of the translucent substrate. The optical functional layer has a concave-convex shape on at least one surface. The optical functional layer contains two types of inorganic fine particles, and resin particles. The optical laminate has an internal haze X and a total haze Y satisfying (1) Y>X, (2) Y≤X+17, (3) Y≤57, and (4) 19≤X≤40. The optical laminate has a transmitted image clarity of 30% to 70% as measured using a 0.5-mm width optical comb. The number of projections having a height of not smaller than 0.1 μm is not less than 600 per mm2 of measurement area in the concave-convex shape as measured by optical interferometry at an outermost surface of the optical functional layer.