Optical Film Surface Texture for Anti-Glare and Jet-Black Appearance
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Solution Overview
Problem
Traditional optical films with larger depressions and projections suffer from reduced jet-black appearance due to reflected scattered light and compromised scratch resistance.
Innovation Solution
An optical film with a surface featuring depressions and projections that have a peak material volume (Vmp) between 0.010 ml/m2 and 0.050 ml/m2 and a minimum autocorrelation length (Sal) between 4.0 μm and 12.0 μm, along with a specific configuration that faces away from the display element, enhancing anti-glare properties and scratch resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If larger depressions and projections are formed on the surface of the optical film to improve anti-glare properties, then anti-glare properties are enhanced, but jet-black appearance deteriorates due to reflected scattered light
Solution Approach 1:
The patent applies parameter changes by precisely controlling the peak material volume (Vmp) within 0.010-0.050 ml/m2 and minimum autocorrelation length (Sal) within 4.0-12.0 μm. This quantitative parameter optimization resolves the contradiction by finding the optimal range that provides sufficient anti-glare properties while minimizing reflected scattered light that degrades jet-black appearance.
Solution Approach 2:
The patent uses partial action by forming depressions and projections with moderate dimensions rather than extreme values. The Vmp is kept within a specific range (0.010-0.050 ml/m2) that is sufficient to scatter glare but not excessive enough to create harmful reflected light, achieving a balanced partial solution.
2Ease of manufacture
If larger depressions and projections are formed on the surface of the optical film to improve anti-glare properties, then anti-glare properties are enhanced, but scratch resistance deteriorates
Solution Approach 1:
The patent resolves this contradiction through parameter changes by limiting the peak material volume to 0.010-0.050 ml/m2 and minimum autocorrelation length to 4.0-12.0 μm. These controlled parameters ensure the surface structure provides anti-glare functionality while maintaining sufficient material integrity and scratch resistance.
Solution Approach 2:
The patent applies local quality by creating a specific surface structure with controlled depression and projection characteristics in the top layer, while maintaining the overall film strength. The localized surface modification achieves anti-glare properties without compromising the global structural integrity and scratch resistance of the optical film.
3Object-generated harmful factors
If the surface structure is modified to reduce reflected scattered light, then jet-black appearance is improved, but anti-glare properties are reduced
Solution Approach 1:
The patent resolves this contradiction through precise parameter changes by optimizing the peak material volume (0.010-0.050 ml/m2) and minimum autocorrelation length (4.0-12.0 μm). This quantitative optimization ensures the surface structure reduces reflected scattered light sufficiently to maintain jet-black appearance while preserving adequate anti-glare properties.
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 film effectively suppresses reflected scattered light, maintaining a jet-black appearance and providing favorable scratch resistance.
Implementation Method 1
an optical film having a surface with depressions and projections may be disposed on their surfaces to suppress reflections of backgrounds such as lighting and people
Data Source
AI summary
Provided is an optical film which has high anti-glare properties, enables a suppress of a reduction in jet-black appearance by reflected scattered light, and has favorable scratch resistance. An optical film having a surface with depressions and projections, wherein the surface with depressions and projections has a peak material volume Vmp of 0.010 ml/m2 or more and 0.050 ml/m2 or less specified in ISO 25178-2:2012, and a minimum autocorrelation length Sal of 4.0 μm or more and 12.0 μm or less specified in ISO 25178-2:2012.