Segmented Glass Substrate for Flexible Display Bending
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Solution Overview
Problem
Conventional display apparatuses with glass substrates are rigid and difficult to bend, limiting their flexibility and adaptability in forming various shapes.
Innovation Solution
A display apparatus design featuring a first and second substrate with specific thickness and shape configurations, including a thinner intermediate portion, a curved surface, and an organic protective layer, along with an encapsulation and resin layer, to enhance flexibility and durability while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a glass substrate with high rigidity is used, then structural strength is improved, but bending flexibility deteriorates
Solution Approach 1:
The glass substrate is divided into multiple regions with different thicknesses: a first region with greater thickness for structural support, and a second region with smaller thickness for bending flexibility. This segmentation allows different parts of the substrate to fulfill different functional requirements simultaneously.
Solution Approach 2:
Different regions of the glass substrate are given different local properties through varying thickness. The first region has greater thickness to provide strength where needed, while the second region has smaller thickness to enable bending, creating local quality variations that resolve the contradiction between overall strength and bending flexibility.
2Adaptability or versatility
If the substrate thickness is reduced to improve flexibility, then bending flexibility is improved, but structural strength deteriorates
Solution Approach 1:
Instead of uniformly reducing substrate thickness, the substrate is segmented into regions of different thicknesses. The second region has reduced thickness to provide bending flexibility, while the first region maintains greater thickness to preserve structural strength, thus resolving the contradiction through spatial segmentation.
Solution Approach 2:
The substrate exhibits local quality variations in thickness to simultaneously achieve flexibility and strength. The thinner second region provides bending flexibility where needed, while the thicker first region maintains structural strength, allowing the substrate to satisfy both contradictory requirements in different locations.
3Ease of manufacture
If a uniform thickness substrate is used, then manufacturing simplicity is improved, but bending reliability deteriorates due to stress concentration
Solution Approach 1:
The substrate employs local quality variations with different thicknesses in different regions. This design optimizes stress distribution during bending operations, with the thinner second region accommodating bending stresses and the thicker first region providing structural support, thereby improving bending reliability while maintaining reasonable manufacturing complexity.
Data Source
AI summary
A display apparatus includes a first substrate, and a display member disposed on the first substrate. The first substrate includes a first-first portion overlapping the display member, and a first-second portion overlapping the display member and spaced apart from the first-first portion.