Textured Antiglare Glass With Dual-Frequency Sparkle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional antiglare glass surfaces exhibit high sparkle and reduced distinctness of image (DOI) characteristics, which are undesirable in high-resolution display devices, and existing methods to reduce sparkle often compromise antiglare properties.
Innovation Solution
A textured glass article with a dual spatial frequency region, comprising a low spatial frequency region and a high spatial frequency region, where the low spatial frequency region has an average lateral feature size exceeding the high spatial frequency region, and a surface roughness ranging from 10 nm to 1000 nm, achieved through multiple etching processes with specific etchants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional surface treatments are applied to reduce sparkle, then sparkle is reduced, but antiglare properties such as DOI deteriorate
Solution Approach 1:
The textured region is segmented into multiple spatial frequency regions (low spatial frequency region and high spatial frequency region) with different average lateral feature sizes. This segmentation allows each region to contribute differently to light scattering, reducing sparkle while preserving antiglare properties.
Solution Approach 2:
Different regions of the textured surface are given different local qualities through varying spatial frequencies and average lateral feature sizes. The low spatial frequency region provides broader light scattering for antiglare performance, while the high spatial frequency region provides finer scattering to reduce sparkle, achieving both goals simultaneously.
2Measurement precision
If high-resolution display devices are used, then display quality is improved, but sparkle effects are exacerbated
Solution Approach 1:
The solution moves from considering only the size of surface features to incorporating spatial frequency as an additional dimension. By controlling both the average lateral feature size and the spatial frequency distribution, the patent achieves sparkle reduction that works effectively with high-resolution displays where pixel pitch is reduced.
3Reliability
If surface roughness is increased to improve antiglare properties, then light scattering is enhanced, but sparkle increases
Solution Approach 1:
The patent changes multiple parameters simultaneously: surface roughness (Ra from 10 nm to 1000 nm), average lateral feature size (varying across spatial frequency regions), and spatial frequency distribution. By coordinating changes in these parameters across different regions, the patent achieves antiglare performance without excessive sparkle.
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 textured glass article achieves low sparkle and DOI of less than 70%, maintaining effective antiglare performance while minimizing sparkle and glare, suitable for high-resolution display devices.
Implementation Method 1
a first etching of a primary surface of a glass substrate with a first etchant to form a low spatial frequency textured region; and a second etching of the primary surface of the glass substrate with a second etchant to form a high spatial frequency textured region
Data Source
AI summary
A glass article is provided that includes: a glass substrate comprising a thickness and a primary surface; and a textured region defined by the primary surface. The textured region comprises a low spatial frequency region and a high spatial frequency region substantially superimposed within the low spatial frequency region. Further, the low spatial frequency region comprises an average lateral feature size that exceeds an average lateral feature size of the high spatial frequency region. In addition, the textured region comprises a surface roughness (Ra) from about 10 nm to about 1000 nm.