Antiglare Layer Height Uniformity for Display Sparkling
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Solution Overview
Problem
Display devices with antiglare layers experience sparkling, which degrades image quality and causes distortion due to non-uniform scattering of light by beads in the antiglare layer.
Innovation Solution
A display device design featuring a base film, a first coating layer with textured structures containing beads, and a second coating layer over the first layer, where the refractive indices of all layers are matched, and the second layer equalizes the heights of textured structures to prevent sparkling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If beads are added to the antiglare layer to scatter light, then light scattering performance is improved, but sparkling occurs due to non-uniform height distribution of textured structures
Solution Approach 1:
The patent applies parameter changes by carefully controlling the bead size (0.8-3.5 micrometers) and adjusting the coating layer thickness to ensure that the textured structures have uniform heights after coating. This uniformity in height parameter prevents the sparkling effect while maintaining effective light scattering through the beads.
Solution Approach 2:
The patent implements local quality by creating textured structures with beads embedded in the coating layer, where each local region has consistent height characteristics. This local uniformity in height distribution across the antiglare layer ensures that light scattering occurs uniformly without creating the sparkling effect associated with non-uniform surfaces.
2Illumination intensity
If textured structures with beads are formed in the antiglare layer, then light scattering is enhanced, but image distortion occurs due to height non-uniformity
Solution Approach 1:
The patent resolves the image distortion issue by controlling the height parameter of textured structures to be uniform across the antiglare layer. This is achieved by optimizing the coating process and bead size selection, ensuring that the height uniformity parameter is maintained while preserving the light scattering function of the textured structures.
3Object-generated harmful factors
If multiple coating layers are applied to equalize textured structure heights, then sparkling is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent reduces manufacturing complexity by optimizing the coating process parameters to achieve uniform textured structure heights in a single or minimal coating steps. By carefully selecting coating thickness and curing parameters, the patent achieves the desired height uniformity without requiring multiple sequential coating operations, thus reducing process complexity while still preventing sparkling.
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 solution effectively reduces image distortion and sparkling, enhancing image quality by ensuring uniform light scattering and maintaining consistent texture heights.
Implementation Method 1
The antiglare layer may scatter incident external light
Implementation Method 2
a first refractive index of the first coating layer, a second refractive index of the beads, and a third refractive index of the second coating layer may be the same
Data Source
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AI summary
Provided is a display device including an antiglare layer. The antiglare layer includes a base film, a first coating layer disposed over the base film and including a plurality of textured structures, a plurality of beads disposed inside the textured structures, and a second coating layer disposed over the first coating layer. The antiglare layer prevents sparkling.