Anti-glare Film Amorphous Patterns Laser Patterning
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Solution Overview
Problem
Conventional anti-glare films for LCDs achieve anti-glare functionality through surface roughness, but this leads to increased haze values, reducing transmittance and causing sparkle issues, while decreasing haze values results in decreased brightness.
Innovation Solution
An anti-glare film with amorphous patterns formed by laser patterning and sand-blasting on a transparent substrate, which reduces the clarity of reflected images and prevents glare without significantly deteriorating transmittance, featuring a gloss range of 30-60% at 20°, 35-90% at 60°, and 85-150% at 85°.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surface roughness is increased to improve anti-glare function, then anti-glare property is improved, but haze value increases and transmittance deteriorates
Solution Approach 1:
The patent divides the anti-glare function into two separate components: (1) a resin layer providing a flat surface for maintaining transmittance and brightness, and (2) a separate anti-glare layer containing inorganic particles that provide the anti-glare function. This segmentation allows each layer to perform its specific function without compromising the other, resolving the contradiction between anti-glare property and transmittance.
Solution Approach 2:
The patent uses a composite structure consisting of a resin layer and an anti-glare layer with inorganic particles (such as silica, alumina, or titania). The composite material approach allows the anti-glare layer to provide surface roughness for glare reduction while the resin layer maintains optical clarity, thus improving anti-glare property without significantly deteriorating transmittance.
2Illumination intensity
If haze value is decreased to improve brightness, then brightness is improved, but sparkle occurs on the surface
Solution Approach 1:
The patent separates the functions of brightness control and sparkle prevention into different layers. The resin layer maintains low haze for brightness, while the anti-glare layer with controlled particle distribution prevents sparkle by diffusing reflected light, thus resolving the contradiction between brightness and sparkle reduction.
3Reliability
If large area of roughness is formed to improve anti-glare property, then anti-glare function is improved, but haze value increases
Solution Approach 1:
The patent applies local quality by creating micro-scale roughness only in the anti-glare layer where inorganic particles are distributed, while the overall film surface remains relatively flat. This localized roughness provides anti-glare function without causing excessive haze across the entire film, thus improving anti-glare function while controlling haze value.
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 film provides improved visibility by reducing the clarity of external reflections while maintaining excellent light diffusion and brightness, outperforming comparative examples in haze and visibility tests.
Implementation Method 1
etching a surface of an engraving roll through laser patterning to form amorphous patterns thereon
Implementation Method 2
a plurality of amorphous patterns on a surface of the curable resin layer, wherein the anti-glare film has a gloss from about 30% to about 60% in a direction of 20°, a gloss from about 35% to about 90% in a direction of 60°, and a gloss from about 85% to about 150% in a direction of 85°
Data Source
AI summary
An anti-glare film and a method of fabricating the same. The anti-glare film includes a transparent substrate, a photocurable resin layer stacked on one surface of the transparent substrate, and a plurality of amorphous patterns formed on a surface of the photocurable resin layer. The anti-glare film can provide excellent diffusion of light, exhibit excellent brightness without deterioration of transmittance, and provide excellent front brightness and visibility when applied to polarizing plates and display devices.