Laminated Glass Anti-Glare Structure with Interdiffusion Regions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current glass-based materials for portable electronic devices face limitations in optical and mechanical properties, such as glare, scratches, and impact resistance, necessitating the development of glass materials with enhanced optical and mechanical characteristics.
Innovation Solution
A laminated glass substrate with a core layer and a clad layer, where the clad layer has a lower refractive index than the core layer, and interdiffusion regions with a higher refractive index than the clad layer are formed using ultrafast lasers to create a light-scattering surface, achieving both low sparkle and low distinctness-of-image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light-transmitting structure with anti-glare properties is implemented, then glare is reduced, but sparkle and distinctness-of-image may deteriorate
Solution Approach 1:
The patent applies local quality by creating interdiffusion regions with specific refractive index characteristics at localized positions within the glass substrate. These regions have a refractive index higher than the clad layer, forming light-scattering centers that selectively scatter glare-reducing wavelengths while maintaining image-forming light transmission. This localized modification of optical properties resolves the contradiction between glare reduction and image quality preservation.
Solution Approach 2:
The patent employs composite material structure by combining multiple glass layers (core layer with higher refractive index and clad layers with lower refractive index) to form a laminated glass substrate. The interdiffusion regions create a composite optical structure where different material regions work together: the core layer provides high refractive index for light scattering, while the clad layers provide low refractive index for light transmission, achieving both glare reduction and image quality maintenance.
2Illumination intensity
If coatings or surface treatments are applied to enhance glass-based materials, then optical properties are improved, but mechanical strength and structural integrity may deteriorate
Solution Approach 1:
The patent merges the optical enhancement function and mechanical strength function into a single integrated glass substrate structure. Instead of applying separate coatings that might compromise mechanical integrity, the anti-glare interdiffusion regions are formed within the bulk of the glass substrate through laser irradiation, combining optical property enhancement with structural integrity in one unified component.
Solution Approach 2:
The patent replaces the mechanical coating system with an optical field-based solution. Instead of applying physical coatings that add mechanical stress and potential failure points, the patent uses laser irradiation to induce interdiffusion regions that modify optical properties through refractive index changes, eliminating the need for separate mechanical coating layers and preserving structural integrity.
3Ease of manufacture
If conventional glass-based materials are used, then manufacturing simplicity is maintained, but optical and mechanical limitations persist
Solution Approach 1:
The patent applies parameter changes by modifying the refractive index parameter of the glass substrate through controlled laser irradiation. The laser treatment creates interdiffusion regions with altered refractive index (higher than the clad layer) without changing the fundamental glass material composition or requiring complex manufacturing processes. This parameter modification approach maintains manufacturing simplicity while achieving enhanced optical characteristics.
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 provides a glass substrate with improved optical parameters, including reduced glare and impact resistance, while maintaining transparency and mechanical strength, enhancing the performance of glass-based materials in electronic devices.
Implementation Method 1
irradiating a laminated glass substrate with a beam from a laser
Implementation Method 2
the beam from the laser is focused on a first interface between the core layer and the first clad layer to melt portions of the core layer and the first clad layer
Implementation Method 3
a light-scattering surface interposed with the first surface, each interdiffusion region comprising an interdiffusion composition that is transparent and has an interdiffusion refractive index nI that is higher than the first clad refractive index nCL1
Data Source
AI summary
A light-transmitting structure is disclosed. The light-transmitting structure includes a laminated glass substrate that has a core layer and a first clad layer fused to a first side of the core layer. The core layer comprises a core glass composition that is transparent and has a core refractive index nC. The first clad layer defines a first surface of the laminated glass substrate and comprises a first clad glass composition that is transparent and has a first clad refractive index nCL1 that is lower than the core refractive index nC. The light-transmitting structure further includes a plurality of interdiffusion regions that extend from the core layer and through the first clad layer to define a light-scattering surface interposed with the first surface. Each interdiffusion region comprises an interdiffusion composition that is transparent and has an interdiffusion refractive index nI that is higher than the first clad refractive index nCL1.