Translucent Structure with Dual-Scale Convex Portions for Antiglare
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Solution Overview
Problem
Existing image display devices suffer from reduced visibility due to sparkle and insufficient antiglare properties when antiglare treatments are applied, as higher antiglare properties often increase sparkle and haze, while existing solutions fail to balance antireflection and antiglare performance effectively.
Innovation Solution
A translucent structure with a concave and convex surface featuring a combination of first and second convex portions, where the first convex portions have diameters exceeding 10 μm and the second convex portions have diameters exceeding 1 μm, both contributing to enhanced antiglare and antireflection properties, and a method for manufacturing this structure using an electrostatic coating apparatus with a rotary atomizing head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an antiglare layer with concave and convex structures is formed by spraying method to enhance antiglare property, then haze increases and antiglare property is improved, but sparkle is emphasized and visibility is reduced
Solution Approach 1:
The invention divides the convex portions into two distinct size categories: first convex portions with a diameter of 1 μm to 10 μm and second convex portions with a diameter of more than 10 μm. This segmentation allows each size category to perform different functions - the smaller first convex portions scatter light to provide antiglare effect while the larger second convex portions reduce sparkle, thereby resolving the contradiction between antiglare property and sparkle suppression
Solution Approach 2:
The invention applies different convex portion characteristics to different regions of the display surface. By controlling the diameter distribution of convex portions locally - with a specific density ratio between first and second convex portions - the surface achieves spatially varying optical properties that simultaneously provide antiglare effect in some areas and sparkle suppression in others
2Object-affected harmful factors
If antireflection treatment is applied to suppress reflection of external light, then reflectivity is reduced, but sparkle occurs and visibility is reduced
Solution Approach 1:
The invention segments the surface structure into convex portions of different size ranges (1-10 μm and >10 μm) that work together to achieve both antireflection and sparkle suppression. The smaller convex portions handle light scattering for antireflection while the larger convex portions control sparkle, resolving the contradiction between reducing external light reflection and preventing sparkle
3Object-generated harmful factors
If convex portions are made larger to suppress sparkle, then sparkle is reduced, but antiglare property deteriorates
Solution Approach 1:
The invention segments convex portions into two size categories with specific diameter ranges: first convex portions (1-10 μm) that provide antiglare effect through light scattering, and second convex portions (>10 μm) that suppress sparkle. By maintaining an appropriate density ratio between these segments, the invention achieves both sparkle suppression and antiglare property without the trade-off that would occur with uniform convex portion sizes
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 structure achieves superior antiglare and antireflection properties while effectively suppressing sparkle, maintaining a haze of 10% to 70% and reflectivity of 3% or less, thereby improving image visibility.
Implementation Method 1
a method in which coating liquid containing a silica precursor such as a hydrolytic condensate of alkoxysilane or the like is applied onto a substrate by a spraying method
Implementation Method 2
coating liquid containing a silica precursor such as a hydrolytic condensate of alkoxysilane
Implementation Method 3
hydrolytic condensate of alkoxysilane
Implementation Method 4
concave and convex structures are formed in the display surface to diffuse and reflect external light to thereby make a reflected image unclear
Implementation Method 5
an antireflection layer is formed in the display surface to thereby suppress reflection of external light itself
Data Source
AI summary
A translucent structure includes a translucent substrate and an antireflection layer provided on a visible side of the translucent substrate so that reflectivity of the translucent structure based on an SCI method is 3% or less. A visible-side outermost surface of the translucent structure includes a concave and convex structure as follows. The concave and convex structure includes a first convex portion and a second convex portion. The first convex portion has a diameter exceeding 10 μm and 185 μm or less in a specific section, and a specific maximum height is 0.2 to 8 μm. The second convex portion has a diameter exceeding 1 μm in a specific section, the number thereof is 0.0001 to 1.2 per 1 μm2, and a specific average height thereof is 0.1 to 8 μm.