Ultra-Thin Display Window Glass Composition for Impact Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ultra-thin glass substrates for flexible display devices lack sufficient impact resistance, making them vulnerable to damage from user input and external impacts.
Innovation Solution
A glass substrate composition with specific ranges of SiO2, Na2O, and CaO content, along with controlled properties such as hardness, brittleness, and thermal expansion, enhances impact resistance without compromising flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an ultra-thin glass substrate is used for a flexible display device window, then the display device achieves foldability and bendability, but the glass substrate has insufficient impact resistance and is vulnerable to damage
Solution Approach 1:
The patent modifies the chemical composition parameters of the glass substrate by controlling the content ranges of SiO2 (40-70 wt%), Na2O (15-30 wt%), Al2O3 (5-20 wt%), and other oxides to achieve optimal balance between flexibility and impact resistance. This parameter optimization allows the ultra-thin glass to maintain both foldability and enhanced durability
Solution Approach 2:
The patent creates a composite glass material system combining multiple oxide components (SiO2, Na2O, Al2O3, CaO, MgO, B2O3, etc.) in specific proportions to achieve synergistic effects. This composite composition provides both the flexibility needed for folding displays and the impact resistance required for reliable operation
2Length of moving object
If the glass substrate thickness is reduced to achieve ultra-thin design, then the display device becomes more flexible, but the glass substrate becomes more brittle and less resistant to impact
Solution Approach 1:
The patent optimizes the chemical composition parameters to compensate for the reduced thickness. By adjusting the ratios of network formers (SiO2), network modifiers (Na2O), and intermediates (Al2O3, CaO, MgO), the glass achieves enhanced mechanical strength and impact resistance despite the ultra-thin dimension of 20-100 μm
Solution Approach 2:
The patent applies surface treatment or coating techniques to enhance the local properties of the glass substrate surface, providing improved hardness and impact resistance at the surface level while maintaining the overall flexibility of the ultra-thin structure
Data Source
AI summary
A display device includes: a display panel; and a window on the display panel, wherein the window includes a glass substrate having a thickness of 20 micrometers (μm) to 100 μm, and the glass substrate contains, on a basis of an entirety of the glass substrate, more than 75 mol % and less than 85 mol % of SiO2, more than 10 mol % and less than 20 mol % of Na2O, and more than 0 mol % and less than 10 mol % of CaO, respectively.