Foldable Glass Window Grooves Reduce Fold Marks and Color Shift
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Solution Overview
Problem
Flexible electronic devices require a window that protects the display panel without impairing folding or bending operations and addresses visible marks and reflection color differences at folded portions due to refractive index variations.
Innovation Solution
A window design featuring a base glass with recessed grooves filled with a mineral dispersion having a refractive index difference of 0.02 or less, combined with a base resin, to maintain folding characteristics and improve display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional window structure is used to protect the display panel, then protection function is provided, but visible marks and reflection color differences appear at folded portions due to refractive index variations
Solution Approach 1:
The patent applies local quality by creating groove parts at specific locations (folding regions) of the window rather than uniform treatment across the entire window. The groove parts are selectively positioned where folding occurs, and filled with filling parts having specific refractive index properties (difference of 0.02 or less) to locally address the optical distortion problem at these critical areas while maintaining the overall window structure.
Solution Approach 2:
The patent uses composite materials by combining the base glass window with filling parts that have specifically controlled refractive indices. The filling parts are composed of materials (such as resins or gels) with refractive indices carefully selected to match the base glass, creating a composite structure that eliminates visible marks and reflection color differences at folded portions while maintaining protection function.
2Ease of operation
If the window structure is modified to address folding characteristics, then folding operation is improved, but the window may compromise protection capability or introduce new defects
Solution Approach 1:
The patent applies segmentation by dividing the window into distinct regions: groove parts located at folding regions and flat parts at non-folding regions. This segmentation allows the groove parts to accommodate folding movements and reduce stress concentration, while the flat parts maintain structural integrity and protection capability. The groove parts can be filled or left empty depending on the specific folding mechanism requirements.
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 window with excellent folding characteristics and minimizes visible marks and reflection color differences, ensuring good display quality in flexible electronic devices.
Implementation Method 1
a filling part configured to fill the at least one groove part, and including a mineral having a dispersion degree of about 0.02 or less, wherein the dispersion degree is a difference in the refractive index between a red color and a purple color of a color spectrum
Data Source
AI summary
A window including a base glass having at least one groove part recessed from at least one surface of an upper surface or a lower surface, and including a filling part configured to fill the at least one groove part and having a mineral with the dispersion degree of about 0.02 or less.