Microstructured Diffuser Coating Valley Filling Antiglare
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Solution Overview
Problem
Current methods for producing matte films and antiglare surfaces often rely on matte particles or texturing methods that can be cumbersome and result in inconsistent optical and physical properties due to variations in particle distribution and coating thickness.
Innovation Solution
A microstructured diffuser is created using a light transmissive film with a first microstructured surface comprising peaks and valleys, where a coating partially fills the valleys to form a second microstructured surface, differing significantly in optical and physical properties, such as haze and clarity, without the use of embedded matte particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If matte particles are added to create a matte film, then the surface provides antiglare properties, but the optical and physical properties become inconsistent due to variations in particle distribution and coating thickness
Solution Approach 1:
The patent removes matte particles from the system entirely, replacing them with a microstructured surface topology. The coating layer is applied over this microstructured surface, and the valleys are selectively filled to create the matte effect without requiring dispersed particles, thereby eliminating the inconsistency caused by particle distribution variations.
Solution Approach 2:
The patent applies different properties to different regions of the surface. The microstructured surface has peaks and valleys with distinct geometries, and the coating selectively fills the valleys while leaving peaks exposed. This creates local variations in surface height and texture that produce consistent antiglare properties across the entire surface without relying on random particle distribution.
2Ease of manufacture
If texturing methods are used to roughen the surface, then a matte finish is achieved, but the process becomes cumbersome and results in inconsistent properties
Solution Approach 1:
The patent creates the microstructured surface with defined peaks and valleys as a preliminary step before applying the coating. This pre-formed microstructure serves as a template that guides the subsequent coating application, ensuring consistent valley filling and peak exposure. The microstructured surface is formed using established techniques such as phase separation or electrospinning, which are more controllable than direct texturing methods.
Solution Approach 2:
The patent introduces a coating layer as an intermediary between the microstructured surface and the external environment. This coating layer selectively fills the valleys of the microstructured surface while maintaining peak exposure, thereby mediating the transition from the microstructured topology to the final matte surface. The coating acts as a controlled medium that translates the microstructure into consistent optical properties.
3Manufacturing precision
If a coating is applied to fill valleys uniformly, then the surface becomes smoother, but the antiglare effect is reduced
Solution Approach 1:
The patent applies the coating selectively rather than uniformly across the entire surface. The coating fills the valleys of the microstructured surface while deliberately leaving the peaks exposed. This localized application creates regions of different surface heights - filled valleys and exposed peaks - that work together to produce the antiglare effect while maintaining overall surface uniformity at the macro scale.
Solution Approach 2:
The patent applies the coating in a controlled manner that achieves partial filling of the valleys rather than complete filling or uniform coating across all surface features. This partial action - filling only the valleys while leaving peaks exposed - is sufficient to create the desired matte effect and maintain antiglare performance without requiring excessive coating material that would smooth out the entire surface.
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 approach consistently achieves desired optical and physical properties, enhancing the film's performance as an antiglare surface with improved durability and uniformity, while avoiding the challenges of particle distribution and coating thickness variations.
Implementation Method 1
A coating is disposed on the first microstructured surface wherein the coating partially fills the valleys forming a second microstructured surface
Implementation Method 2
A coating is disposed on the first microstructured surface wherein the coating partially fills the valleys forming a second microstructured surface
Implementation Method 3
The first and second microstructured surface can each be characterized by at least one optical property such as haze or clarity
Data Source
AI summary
A microstructured diffuser is described comprising a light transmissive film comprising a first microstructured surface comprising a plurality of peaks and valleys. A coating is disposed on the first microstructured surface. The coating partially fills the valleys forming a second microstructured surface.